pushing latest changes

Reviewed-by: gtema <artem.goncharov@gmail.com>
Co-authored-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-committed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
This commit is contained in:
Hasko, Vladimir 2022-09-06 15:22:18 +00:00 committed by zuul
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<h1 class="topictitle1">Backing Up ECS Data</h1>
<div id="body0000001128604648"><div class="section" id="EN-US_TOPIC_0000001128604648__section1650061192010"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0000001128604648__p8263208152018">CBR enhances data integrity and service continuity. For example, if an ECS or a EVS disk is faulty or a misoperation causes data loss, you can use data backups to quickly restore data. This section describes how to back up ECSs and EVS disks.</p>
<p id="EN-US_TOPIC_0000001128604648__p8177113721018">For more information, <a href="en-us_topic_0000001128445638.html#EN-US_TOPIC_0000001128445638__section10399144613501">CBR Architecture</a>, <a href="en-us_topic_0000001128445638.html#EN-US_TOPIC_0000001128445638__section696712594578">Backup Mechanism</a>, and <a href="en-us_topic_0000001128445638.html#EN-US_TOPIC_0000001128445638__section533362013">Backup Options</a>.</p>
<div class="p" id="EN-US_TOPIC_0000001128604648__p1852521716489">You can back up ECS data using the Cloud Server Backup or Cloud Disk Backup function.<ul id="EN-US_TOPIC_0000001128604648__ul18366112610528"><li id="EN-US_TOPIC_0000001128604648__li16366926185213">Cloud Server Backup (recommended): Use this backup function if you want to back up the data of all EVS disks (system and data disks) on an ECS. This prevents data inconsistency caused by time difference in creating a backup.</li><li id="EN-US_TOPIC_0000001128604648__li6193532193917">Cloud Disk Backup: Use this backup function if you want to back up the data of one or more EVS disks (system or data disk) on an ECS. This minimizes backup costs on the basis of data security.</li></ul>
<div class="p" id="EN-US_TOPIC_0000001128604648__p1852521716489">You can back up ECS data using Cloud Server Backup or Cloud Disk Backup.<ul id="EN-US_TOPIC_0000001128604648__ul18366112610528"><li id="EN-US_TOPIC_0000001128604648__li16366926185213">Cloud Server Backup (recommended): Use this backup function if you want to back up the data of all EVS disks (system and data disks) on an ECS. This prevents data inconsistency caused by time difference in creating a backup.</li><li id="EN-US_TOPIC_0000001128604648__li6193532193917">Cloud Disk Backup: Use this backup function if you want to back up the data of one or more EVS disks (system or data disk) on an ECS. This minimizes backup costs on the basis of data security.</li></ul>
</div>
</div>
<div class="section" id="EN-US_TOPIC_0000001128604648__section1685231310443"><h4 class="sectiontitle">ECS Backup Procedure</h4><ol id="EN-US_TOPIC_0000001128604648__ol147701510184519"><li id="EN-US_TOPIC_0000001128604648__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0000001128604648__li464234814566">Click <span><img id="EN-US_TOPIC_0000001128604648__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0000001128604648__li1654693454617">Under <strong id="EN-US_TOPIC_0000001128604648__b7106164010277"><span id="EN-US_TOPIC_0000001128604648__text9991640152718">Computing</span></strong>, click <strong id="EN-US_TOPIC_0000001128604648__b31061440112716">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0000001128604648__li113648682416">Locate the row that contains the target ECS. Click <strong id="EN-US_TOPIC_0000001128604648__b29177129503">More</strong> in the <strong id="EN-US_TOPIC_0000001128604648__b191716125504">Operation</strong> column and select <strong id="EN-US_TOPIC_0000001128604648__b291721285011">Manage Image/Disk &gt; Create Backup</strong>.<ul id="EN-US_TOPIC_0000001128604648__ul4315152019362"><li id="EN-US_TOPIC_0000001128604648__li12315220163611">If the ECS has been associated with a vault, configure the backup information as prompted.<ul id="EN-US_TOPIC_0000001128604648__ul74118744418"><li id="EN-US_TOPIC_0000001128604648__li164287184411"><strong id="EN-US_TOPIC_0000001128604648__b5847194118180">Server List</strong>: The ECS to be backed up is selected by default.</li><li id="EN-US_TOPIC_0000001128604648__li104214713447"><strong id="EN-US_TOPIC_0000001128604648__b674664614184">Name</strong>: Customize your backup name.</li><li id="EN-US_TOPIC_0000001128604648__li134214754413"><strong id="EN-US_TOPIC_0000001128604648__b1343010551187">Description</strong>: Supplementary information about the backup.</li><li id="EN-US_TOPIC_0000001128604648__li1421372447"><strong id="EN-US_TOPIC_0000001128604648__b163811013198">Full Backup</strong>: If this option is selected, the system will perform full backup for the ECS to be associated. The storage capacity used by the backup increases accordingly.</li></ul>
<div class="section" id="EN-US_TOPIC_0000001128604648__section1685231310443"><h4 class="sectiontitle">ECS Backup Procedure</h4><ol id="EN-US_TOPIC_0000001128604648__ol147701510184519"><li id="EN-US_TOPIC_0000001128604648__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0000001128604648__li464234814566">Click <span><img id="EN-US_TOPIC_0000001128604648__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0000001128604648__li1654693454617">Under <strong id="EN-US_TOPIC_0000001128604648__b18308515152819"><span id="EN-US_TOPIC_0000001128604648__text8308215192815">Computing</span></strong>, click <strong id="EN-US_TOPIC_0000001128604648__b130821514288">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0000001128604648__li113648682416">Locate the row that contains the target ECS. Click <strong id="EN-US_TOPIC_0000001128604648__b29177129503">More</strong> in the <strong id="EN-US_TOPIC_0000001128604648__b191716125504">Operation</strong> column and select <strong id="EN-US_TOPIC_0000001128604648__b291721285011">Manage Image/Disk &gt; Create Backup</strong>.<ul id="EN-US_TOPIC_0000001128604648__ul4315152019362"><li id="EN-US_TOPIC_0000001128604648__li12315220163611">If the ECS has been associated with a vault, configure the backup information as prompted.<ul id="EN-US_TOPIC_0000001128604648__ul74118744418"><li id="EN-US_TOPIC_0000001128604648__li164287184411"><strong id="EN-US_TOPIC_0000001128604648__b5847194118180">Server List</strong>: The ECS to be backed up is selected by default.</li><li id="EN-US_TOPIC_0000001128604648__li104214713447"><strong id="EN-US_TOPIC_0000001128604648__b674664614184">Name</strong>: Customize your backup name.</li><li id="EN-US_TOPIC_0000001128604648__li134214754413"><strong id="EN-US_TOPIC_0000001128604648__b1343010551187">Description</strong>: Supplementary information about the backup.</li><li id="EN-US_TOPIC_0000001128604648__li1421372447"><strong id="EN-US_TOPIC_0000001128604648__b163811013198">Full Backup</strong>: If this option is selected, the system will perform full backup for the ECS to be associated. The storage capacity used by the backup increases accordingly.</li></ul>
</li><li id="EN-US_TOPIC_0000001128604648__li1523293617363">If the ECS is not associated with a vault, buy a vault first and then configure the backup information as prompted.<p id="EN-US_TOPIC_0000001128604648__p959812452243"><a name="EN-US_TOPIC_0000001128604648__li1523293617363"></a><a name="li1523293617363"></a>For details, see <em id="EN-US_TOPIC_0000001128604648__i1248374682415">Cloud Backup and Recovery User Guide</em>.</p>
</li></ul>
</li><li id="EN-US_TOPIC_0000001128604648__li175591309446">Click <strong id="EN-US_TOPIC_0000001128604648__b354222122517">OK</strong>. The system automatically creates a backup for the ECS.<p id="EN-US_TOPIC_0000001128604648__p1805632194414">On the <strong id="EN-US_TOPIC_0000001128604648__b873775316237">Backups</strong> tab page, if the status of the backup is <strong id="EN-US_TOPIC_0000001128604648__b7936121217409">Available</strong>, the backup task is successful.</p>
<p id="EN-US_TOPIC_0000001128604648__p12791616192815">The ECS can be restarted if the backup progress of an ECS exceeds 10%. However, to ensure data integrity, restart it after the backup is complete.</p>
</li></ol>
</div>
<div class="section" id="EN-US_TOPIC_0000001128604648__section7890518132019"><h4 class="sectiontitle">EVS Disk Backup Procedure</h4><ol id="EN-US_TOPIC_0000001128604648__ol17890418192017"><li id="EN-US_TOPIC_0000001128604648__li1789091817209">Log in to the management console.</li><li id="EN-US_TOPIC_0000001128604648__li7890171852016">Click <span><img id="EN-US_TOPIC_0000001128604648__en-us_topic_0014250631_image1862675853202121_1" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0000001128604648__li68901818132010">Under <strong id="EN-US_TOPIC_0000001128604648__b118577468278"><span id="EN-US_TOPIC_0000001128604648__text6850134682715">Computing</span></strong>, click <strong id="EN-US_TOPIC_0000001128604648__b17857946132712">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0000001128604648__li138904183204">Locate the row that contains the target ECS. Click <strong id="EN-US_TOPIC_0000001128604648__b1746151917415">More</strong> in the <strong id="EN-US_TOPIC_0000001128604648__b34610192416">Operation</strong> column and select <strong id="EN-US_TOPIC_0000001128604648__b493383911298">Create Backup</strong>.<ul id="EN-US_TOPIC_0000001128604648__ul10890418122011"><li id="EN-US_TOPIC_0000001128604648__li28901318112015">If the ECS has been associated with a vault, configure the backup information as prompted.<ul id="EN-US_TOPIC_0000001128604648__ul12890418122010"><li id="EN-US_TOPIC_0000001128604648__li128901518102012"><strong id="EN-US_TOPIC_0000001128604648__b17719174110139">Server List</strong>: The ECS to be backed up is selected by default. Click <span><img id="EN-US_TOPIC_0000001128604648__image53598395422" src="en-us_image_0000001128656892.png" title="Click to enlarge" class="imgResize"></span> to view the disks attached to the ECSs. Select the disks to be backed up.</li><li id="EN-US_TOPIC_0000001128604648__li1789016180208"><strong id="EN-US_TOPIC_0000001128604648__b51371052134118">Name</strong>: Customize your backup name.</li><li id="EN-US_TOPIC_0000001128604648__li168901718172014"><strong id="EN-US_TOPIC_0000001128604648__b106911853174116">Description</strong>: Supplementary information about the backup.</li><li id="EN-US_TOPIC_0000001128604648__li1489017189204"><strong id="EN-US_TOPIC_0000001128604648__b18291318162117">Full Backup</strong>: If this option is selected, the system will perform full backup for the disks to be associated. The storage capacity used by the backup increases accordingly.</li></ul>
<div class="section" id="EN-US_TOPIC_0000001128604648__section7890518132019"><h4 class="sectiontitle">EVS Disk Backup Procedure</h4><ol id="EN-US_TOPIC_0000001128604648__ol17890418192017"><li id="EN-US_TOPIC_0000001128604648__li1789091817209">Log in to the management console.</li><li id="EN-US_TOPIC_0000001128604648__li7890171852016">Click <span><img id="EN-US_TOPIC_0000001128604648__en-us_topic_0014250631_image1862675853202121_1" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0000001128604648__li68901818132010">Under <strong id="EN-US_TOPIC_0000001128604648__b61859373299"><span id="EN-US_TOPIC_0000001128604648__text1718543742916">Computing</span></strong>, click <strong id="EN-US_TOPIC_0000001128604648__b1518516372293">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0000001128604648__li138904183204">Locate the row that contains the target ECS. Click <strong id="EN-US_TOPIC_0000001128604648__b1746151917415">More</strong> in the <strong id="EN-US_TOPIC_0000001128604648__b34610192416">Operation</strong> column and select <strong id="EN-US_TOPIC_0000001128604648__b493383911298">Create Backup</strong>.<ul id="EN-US_TOPIC_0000001128604648__ul10890418122011"><li id="EN-US_TOPIC_0000001128604648__li28901318112015">If the ECS has been associated with a vault, configure the backup information as prompted.<ul id="EN-US_TOPIC_0000001128604648__ul12890418122010"><li id="EN-US_TOPIC_0000001128604648__li128901518102012"><strong id="EN-US_TOPIC_0000001128604648__b17719174110139">Server List</strong>: The ECS to be backed up is selected by default. Click <span><img id="EN-US_TOPIC_0000001128604648__image53598395422" src="en-us_image_0000001128656892.png" title="Click to enlarge" class="imgResize"></span> to view the disks attached to the ECSs. Select the disks to be backed up.</li><li id="EN-US_TOPIC_0000001128604648__li1789016180208"><strong id="EN-US_TOPIC_0000001128604648__b51371052134118">Name</strong>: Customize your backup name.</li><li id="EN-US_TOPIC_0000001128604648__li168901718172014"><strong id="EN-US_TOPIC_0000001128604648__b106911853174116">Description</strong>: Supplementary information about the backup.</li><li id="EN-US_TOPIC_0000001128604648__li1489017189204"><strong id="EN-US_TOPIC_0000001128604648__b18291318162117">Full Backup</strong>: If this option is selected, the system will perform full backup for the disks to be associated. The storage capacity used by the backup increases accordingly.</li></ul>
</li><li id="EN-US_TOPIC_0000001128604648__li6890201892017">If the ECS is not associated with a vault, buy a vault first and then configure the backup information as prompted.<p id="EN-US_TOPIC_0000001128604648__p18917194192511"><a name="EN-US_TOPIC_0000001128604648__li6890201892017"></a><a name="li6890201892017"></a>For details, see <em id="EN-US_TOPIC_0000001128604648__i1101192181716">Cloud Backup and Recovery User Guide</em>.</p>
</li></ul>
</li><li id="EN-US_TOPIC_0000001128604648__li8890131812012">Click <strong id="EN-US_TOPIC_0000001128604648__b538510218222">OK</strong>. The system automatically creates a backup for the disk.<p id="EN-US_TOPIC_0000001128604648__p2890171817207">On the <strong id="EN-US_TOPIC_0000001128604648__b12171926244">Backups</strong> tab page, if the status of the backup is <strong id="EN-US_TOPIC_0000001128604648__b161813262416">Available</strong>, the backup task is successful.</p>

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</div>
<div class="section" id="EN-US_TOPIC_0000001210881033__section44761618172016"><h4 class="sectiontitle">How Do I Apply for a Higher Quota?</h4><p id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_p133802054172617">The system does not support online quota adjustment. If you need to adjust a quota, call the hotline or send an email to the customer service mailbox. Customer service personnel will timely process your request for quota adjustment and inform you of the real-time progress by making a call or sending an email.</p>
<p id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_p13745144852611">Before dialing the hotline number or sending an email, make sure that the following information has been obtained:</p>
<ul id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_ul37351029162712"><li id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_li12735132932714">Domain name, project name, and project ID, which can be obtained by performing the following operations:<p id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_p1973542918275"><a name="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_li12735132932714"></a><a name="en-us_topic_0040259342_li12735132932714"></a>Log in to the management console using the cloud account, click the username in the upper right corner, select <strong id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_b198340190">My Credentials</strong> from the drop-down list, and obtain the domain name, project name, and project ID on the <strong id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_b2029210854">My Credentials</strong> page.</p>
<ul id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_ul37351029162712"><li id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_li12735132932714">Domain name, project name, and project ID, which can be obtained by performing the following operations:<p id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_p1973542918275"><a name="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_li12735132932714"></a><a name="en-us_topic_0040259342_li12735132932714"></a>Log in to the management console using the cloud account, click the username in the upper right corner, select <strong id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_b171181053141511">My Credentials</strong> from the drop-down list, and obtain the domain name, project name, and project ID on the <strong id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_b1956165671712">My Credentials</strong> page.</p>
</li><li id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_li13735182917270">Quota information, which includes:<ul id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_ul6735102912273"><li id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_li1073516296277">Service name</li><li id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_li6735152972712">Quota type</li><li id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_li773592992718">Required quota</li></ul>
</li></ul>
<p id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_p126761744182712"><a href="https://docs.otc.t-systems.com/en-us/public/learnmore.html" target="_blank" rel="noopener noreferrer">Learn how to obtain the service hotline and email address.</a></p>

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<a name="EN-US_TOPIC_0000001234175322"></a><a name="EN-US_TOPIC_0000001234175322"></a>
<h1 class="topictitle1">Key Pairs</h1>
<div id="body0000001234175322"><p id="EN-US_TOPIC_0000001234175322__p8060118"></p>
</div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="en-us_topic_0000001278335673.html">Application Scenarios for Using Key Pairs</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0000001278350057.html">(Recommended) Creating a Key Pair on the Management Console</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0000001234335274.html">Creating a Key Pair Using PuTTYgen</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0000001278734873.html">Importing a Key Pair</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0000001234183498.html">Obtaining and Deleting the Password of an Windows ECS</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0140313881.html">Passwords and Key Pairs</a></div>
</div>
</div>

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<a name="EN-US_TOPIC_0000001234183498"></a><a name="EN-US_TOPIC_0000001234183498"></a>
<h1 class="topictitle1">Obtaining and Deleting the Password of an Windows ECS</h1>
<div id="body0000001234183498"><p id="EN-US_TOPIC_0000001234183498__p8060118"></p>
</div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="en-us_topic_0031107266.html">Obtaining the Password for Logging In to a Windows ECS</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0031107267.html">Deleting the Initial Password for Logging In to a Windows ECS</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0000001234175322.html">Key Pairs</a></div>
</div>
</div>

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<a name="EN-US_TOPIC_0000001234335274"></a><a name="EN-US_TOPIC_0000001234335274"></a>
<h1 class="topictitle1">Creating a Key Pair Using PuTTYgen</h1>
<div id="body0000001234335274"><div class="section" id="EN-US_TOPIC_0000001234335274__section11761642123315"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0000001234335274__p1816103765411">You can use PuTTYgen to create a key pair and store the public key and private key locally.</p>
<div class="note" id="EN-US_TOPIC_0000001234335274__note13108124945412"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0000001234335274__p10108134919543">Key pairs created using puttygen.exe must be imported by referring to <a href="en-us_topic_0000001278734873.html">Importing a Key Pair</a> before they are used.</p>
</div></div>
</div>
<div class="section" id="EN-US_TOPIC_0000001234335274__section10701785349"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0000001234335274__ol174034114342"><li id="EN-US_TOPIC_0000001234335274__li164031311103411">Download and install PuTTY and PuTTYgen.<p id="EN-US_TOPIC_0000001234335274__p1679692494411"><a name="EN-US_TOPIC_0000001234335274__li164031311103411"></a><a name="li164031311103411"></a><a href="https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html" target="_blank" rel="noopener noreferrer">https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html</a></p>
<div class="note" id="EN-US_TOPIC_0000001234335274__note45922157111724"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0000001234335274__p10646236111724">PuTTYgen is a key generator, which is used to create a key pair that consists of a public key and a private key for PuTTY.</p>
</div></div>
</li><li id="EN-US_TOPIC_0000001234335274__li240361183417">Obtain the public and private keys.<ol type="a" id="EN-US_TOPIC_0000001234335274__en-us_topic_0037960038_ol25604984155818"><li id="EN-US_TOPIC_0000001234335274__en-us_topic_0037960038_li149523815580">Double-click <strong id="EN-US_TOPIC_0000001234335274__b124701247616">puttygen.exe</strong> to open <strong id="EN-US_TOPIC_0000001234335274__b1347044561">PuTTY Key Generator</strong>.<div class="fignone" id="EN-US_TOPIC_0000001234335274__en-us_topic_0037960038_fig4490538015580"><span class="figcap"><b>Figure 1 </b>PuTTY Key Generator</span><br><span><img id="EN-US_TOPIC_0000001234335274__image1085155834213" src="en-us_image_0000001234512206.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0000001234335274__en-us_topic_0037960038_li5400542415580">Click <strong id="EN-US_TOPIC_0000001234335274__b19398221363">Generate</strong>.<p id="EN-US_TOPIC_0000001234335274__en-us_topic_0037960038_p1345714315580">The key generator automatically generates a key pair that consists of a public key and a private key. The content shown in the red box in <a href="#EN-US_TOPIC_0000001234335274__en-us_topic_0037960038_fig4678746517750">Figure 2</a> is the public key.</p>
<div class="fignone" id="EN-US_TOPIC_0000001234335274__en-us_topic_0037960038_fig4678746517750"><a name="EN-US_TOPIC_0000001234335274__en-us_topic_0037960038_fig4678746517750"></a><a name="en-us_topic_0037960038_fig4678746517750"></a><span class="figcap"><b>Figure 2 </b>Generating the public and private keys</span><br><span><img id="EN-US_TOPIC_0000001234335274__image17566352204514" src="en-us_image_0000001278632153.png" title="Click to enlarge" class="imgResize"></span></div>
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</li><li id="EN-US_TOPIC_0000001234335274__li18403111116343"><a name="EN-US_TOPIC_0000001234335274__li18403111116343"></a><a name="li18403111116343"></a>Copy the public key to a .txt file and save it to a local directory.<div class="note" id="EN-US_TOPIC_0000001234335274__note31016447113457"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0000001234335274__p4928242511355">Do not save the public key by clicking <strong id="EN-US_TOPIC_0000001234335274__b157132042999">Save public key</strong> because this operation will change the format of the public key content and cause the public key to fail to be imported to the management console.</p>
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</li><li id="EN-US_TOPIC_0000001234335274__li740317117344">Save the private key and keep it secure. The private key can be downloaded only once.<p id="EN-US_TOPIC_0000001234335274__en-us_topic_0014250631_p14390612143442"><a name="EN-US_TOPIC_0000001234335274__li740317117344"></a><a name="li740317117344"></a>The format in which to save your private key file varies depending on application scenarios.</p>
<ul id="EN-US_TOPIC_0000001234335274__en-us_topic_0014250631_ul484510143442"><li id="EN-US_TOPIC_0000001234335274__en-us_topic_0014250631_li18866571143442">When using PuTTY to log in to a Linux ECS:<div class="p" id="EN-US_TOPIC_0000001234335274__en-us_topic_0014250631_p61748609143442"><a name="EN-US_TOPIC_0000001234335274__en-us_topic_0014250631_li18866571143442"></a><a name="en-us_topic_0014250631_li18866571143442"></a>Save the private key file in the <span class="parmvalue" id="EN-US_TOPIC_0000001234335274__parmvalue612085373610"><b>.ppk</b></span> format.<ol type="a" id="EN-US_TOPIC_0000001234335274__en-us_topic_0014250631_ol21774037143442"><li id="EN-US_TOPIC_0000001234335274__en-us_topic_0014250631_li62406652143442">On the <strong id="EN-US_TOPIC_0000001234335274__b16113153398">PuTTY Key Generator</strong> page, choose <strong id="EN-US_TOPIC_0000001234335274__b061291517394">File</strong> &gt; <strong id="EN-US_TOPIC_0000001234335274__b761311155392">Save private key</strong>.<div class="fignone" id="EN-US_TOPIC_0000001234335274__fig1031955919299"><span class="figcap"><b>Figure 3 </b>Saving a private key</span><br><span><img id="EN-US_TOPIC_0000001234335274__image1836618020521" src="en-us_image_0000001278352685.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0000001234335274__en-us_topic_0014250631_li24788958143442">Save the converted private key file, such as <strong id="EN-US_TOPIC_0000001234335274__b148740183919">kp-123.ppk</strong>, locally.</li></ol>
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</li><li id="EN-US_TOPIC_0000001234335274__en-us_topic_0014250631_li22423455143442">When using Xshell to log in to a Linux ECS or obtaining the password for logging in to a Windows ECS:<div class="p" id="EN-US_TOPIC_0000001234335274__en-us_topic_0014250631_p2491495143442"><a name="EN-US_TOPIC_0000001234335274__en-us_topic_0014250631_li22423455143442"></a><a name="en-us_topic_0014250631_li22423455143442"></a>Save the private key file in the <span class="parmvalue" id="EN-US_TOPIC_0000001234335274__parmvalue76228413435"><b>.pem</b></span> format.<ol type="a" id="EN-US_TOPIC_0000001234335274__en-us_topic_0014250631_ol45016075143442"><li id="EN-US_TOPIC_0000001234335274__en-us_topic_0014250631_li63522095143442">Choose <strong id="EN-US_TOPIC_0000001234335274__b32667264438">Conversions</strong> &gt; <strong id="EN-US_TOPIC_0000001234335274__b2267726194319">Export OpenSSH key</strong>.<div class="note" id="EN-US_TOPIC_0000001234335274__note101379875915"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0000001234335274__p0137118165910">If you use this private file to obtain the password for logging in to a Windows <span id="EN-US_TOPIC_0000001234335274__text172667229304">ECS</span>, do not specify <strong id="EN-US_TOPIC_0000001234335274__b0355529184315">Key passphrase</strong> for <strong id="EN-US_TOPIC_0000001234335274__b635562913437">Export OpenSSH key</strong> so that you can obtain the password successfully.</p>
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<div class="fignone" id="EN-US_TOPIC_0000001234335274__fig15752222153016"><span class="figcap"><b>Figure 4 </b>Saving a private key</span><br><span><img id="EN-US_TOPIC_0000001234335274__image14824133144713" src="en-us_image_0000001278751917.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0000001234335274__en-us_topic_0014250631_li34827947143442">Save the private key, for example, <strong id="EN-US_TOPIC_0000001234335274__b58833308463">kp-123.pem</strong>, locally.</li></ol>
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</li></ul>
</li><li id="EN-US_TOPIC_0000001234335274__li1340321173413">After you have saved the key pair, import your public key to the ECS by referring to <a href="en-us_topic_0000001278734873.html">Importing a Key Pair</a>.</li></ol>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0000001234175322.html">Key Pairs</a></div>
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<h1 class="topictitle1">Application Scenarios for Using Key Pairs</h1>
<div id="body0000001278335673"><div class="section" id="EN-US_TOPIC_0000001278335673__section336851111274"><h4 class="sectiontitle">Key Pairs</h4><p id="EN-US_TOPIC_0000001278335673__p48923129273">Key pairs are a set of security credentials for identity authentication when you remotely log in to ECSs.</p>
<p id="EN-US_TOPIC_0000001278335673__p12739174062815">A key pair consists of a public key and a private key. ECS stores the public key and you store the private key. If you have imported a public key into a Linux ECS, you can use the corresponding private key to log in to the ECS without a password. Therefore, you do not need to worry about password interception, cracking, or leakage.</p>
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<div class="section" id="EN-US_TOPIC_0000001278335673__section72625177171"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0000001278335673__p64851122187">When purchasing an ECS, you are advised to select the key pair login mode. For Windows ECSs, key pairs are required to decrypt the passwords so that you can use the decrypted password to log in.</p>
<ul id="EN-US_TOPIC_0000001278335673__ul114361152198"><li id="EN-US_TOPIC_0000001278335673__li14436191511190">Logging in to a Linux ECS<div class="p" id="EN-US_TOPIC_0000001278335673__p18838194782716"><a name="EN-US_TOPIC_0000001278335673__li14436191511190"></a><a name="li14436191511190"></a>You can directly use a key pair to log in.<ul id="EN-US_TOPIC_0000001278335673__ul181461546172719"><li id="EN-US_TOPIC_0000001278335673__li71454469278">When creating an ECS, select the key pair login mode. For details, see "Set Login Mode" in <a href="en-us_topic_0163572591.html">Step 3: Configure Advanced Settings</a>. </li><li id="EN-US_TOPIC_0000001278335673__li1114624612274">After the ECS is created, bind a key pair to the ECS by referring to "Binding a Key Pair" in the <em id="EN-US_TOPIC_0000001278335673__i2105132216190">Data Encryption Workshop User Guide</em>.</li></ul>
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<ul id="EN-US_TOPIC_0000001278335673__ul6174151881910"><li id="EN-US_TOPIC_0000001278335673__li417414186193">Logging in to a Windows ECS<p id="EN-US_TOPIC_0000001278335673__p8107142963217"><a name="EN-US_TOPIC_0000001278335673__li417414186193"></a><a name="li417414186193"></a>You can use the key pair to obtain a password for login. The password is randomly generated and therefore is more secure.</p>
<p id="EN-US_TOPIC_0000001278335673__p1950533818159">For details, see <a href="en-us_topic_0031107266.html">Obtaining the Password for Logging In to a Windows ECS</a>.</p>
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<div class="section" id="EN-US_TOPIC_0000001278335673__section11987840143215"><h4 class="sectiontitle">Creating a Key Pair</h4><p id="EN-US_TOPIC_0000001278335673__p57138362142357">You can create a key pair or use an existing one for remote login authentication.</p>
<ul id="EN-US_TOPIC_0000001278335673__ul1480389919483"><li id="EN-US_TOPIC_0000001278335673__li91334411120">Creating a key pair<div class="p" id="EN-US_TOPIC_0000001278335673__p305358071120"><a name="EN-US_TOPIC_0000001278335673__li91334411120"></a><a name="li91334411120"></a>You can create a key pair using either of the following method:<ul id="EN-US_TOPIC_0000001278335673__ul4158767114307"><li id="EN-US_TOPIC_0000001278335673__li4071623014303">Follow the instructions in <a href="en-us_topic_0000001278350057.html">(Recommended) Creating a Key Pair on the Management Console</a>. The public key is automatically stored in the system, and the private key is stored locally.</li><li id="EN-US_TOPIC_0000001278335673__li3351550103416">Follow the instructions in <a href="en-us_topic_0000001234335274.html">Creating a Key Pair Using PuTTYgen</a>. Both the public and private keys are stored locally.<p id="EN-US_TOPIC_0000001278335673__p162110523343">After the key pair is created, import the key pair following the instructions provided in <a href="en-us_topic_0000001278734873.html">Importing a Key Pair</a> so that you can use it.</p>
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</li><li id="EN-US_TOPIC_0000001278335673__li5856373211153">Using an existing key pair<p id="EN-US_TOPIC_0000001278335673__p1397914811153"><a name="EN-US_TOPIC_0000001278335673__li5856373211153"></a><a name="li5856373211153"></a>If an existing key pair (created using PuTTYgen, for example) is available, you can import the public key by referring to <a href="en-us_topic_0000001278734873.html">Importing a Key Pair</a> on the management console to let the system maintain the public key for you.</p>
<div class="note" id="EN-US_TOPIC_0000001278335673__note34429373192252"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0000001278335673__p45841647192116">If the public key of the existing key pair is stored by clicking <strong id="EN-US_TOPIC_0000001278335673__b15253196121110">Save public key</strong> on PuTTY Key Generator, the public key cannot be imported to the management console.</p>
<p id="EN-US_TOPIC_0000001278335673__p41428907192252">If you want to use this existing key pair for remote login, see <a href="en-us_topic_0047654687.html">Why Does a Key Pair Created Using puttygen.exe Fail to Be Imported on the Management Console?</a></p>
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</li></ul>
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<div class="section" id="EN-US_TOPIC_0000001278335673__section57670118165256"><h4 class="sectiontitle">Constraints</h4><ul id="EN-US_TOPIC_0000001278335673__ul39416956165437"><li id="EN-US_TOPIC_0000001278335673__li914832612416">Key pairs can be used to remotely log in to Linux ECSs only.</li><li id="EN-US_TOPIC_0000001278335673__li173231662366">SSH-2 key pairs created on the console support only the RSA-2048 cryptographic algorithms.</li><li id="EN-US_TOPIC_0000001278335673__li33811559184416">Key pairs are only for one user but they can be imported to other users.</li><li id="EN-US_TOPIC_0000001278335673__li258245044717">Key pairs can be used only for ECSs in the same region.</li><li id="EN-US_TOPIC_0000001278335673__li11304141193611">Imported key pairs support the following cryptographic algorithms:<ul id="EN-US_TOPIC_0000001278335673__ul92724289362"><li id="EN-US_TOPIC_0000001278335673__li2069732612367">RSA-1024</li><li id="EN-US_TOPIC_0000001278335673__li1870018264364">RSA-2048</li><li id="EN-US_TOPIC_0000001278335673__li270219265362">RSA-4096</li></ul>
</li><li id="EN-US_TOPIC_0000001278335673__li3163843411410">Store your private key in a secure place because you need to use it to prove your identity when logging in to your ECS. The private key can be downloaded once only.</li></ul>
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<h1 class="topictitle1">(Recommended) Creating a Key Pair on the Management Console</h1>
<div id="body0000001278350057"><div class="section" id="EN-US_TOPIC_0000001278350057__section4859995204421"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0000001278350057__p45751306523">You can use the management console to create a key pair. ECS stores the public key and you store the private key.</p>
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<div class="section" id="EN-US_TOPIC_0000001278350057__section35336147204538"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0000001278350057__ol1373281010048"><li id="EN-US_TOPIC_0000001278350057__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0000001278350057__li0975135720214">Click <span><img id="EN-US_TOPIC_0000001278350057__en-us_topic_0014250631_image1733511156361" src="en-us_image_0000001234668870.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0000001278350057__li3861581410048">Under <strong id="EN-US_TOPIC_0000001278350057__b57052041164811"><span id="EN-US_TOPIC_0000001278350057__text1570564144817">Computing</span></strong>, click <strong id="EN-US_TOPIC_0000001278350057__b9706134115481">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0000001278350057__li1199800610048">In the navigation pane on the left, choose <strong id="EN-US_TOPIC_0000001278350057__b162483549591">Key Pair</strong>.</li><li id="EN-US_TOPIC_0000001278350057__li4087319010048">On the <strong id="EN-US_TOPIC_0000001278350057__b9885614153417">Key Pair Service</strong> page, click <strong id="EN-US_TOPIC_0000001278350057__b1840322415452">Create Key Pair</strong>.</li><li id="EN-US_TOPIC_0000001278350057__li3231439110048">Enter a key pair name and click <strong id="EN-US_TOPIC_0000001278350057__b1927165654814">OK</strong>.<p id="EN-US_TOPIC_0000001278350057__p1740111712710">The default key pair name consists of <strong id="EN-US_TOPIC_0000001278350057__b154723103494">KeyPair-</strong> and four random characters in the "KeyPair-<em id="EN-US_TOPIC_0000001278350057__i103938406367">xxxx</em>" format. Change it to an easy-to-remember one, for example, <strong id="EN-US_TOPIC_0000001278350057__b947341014910">KeyPair-xxxx_ecs</strong>.</p>
</li><li id="EN-US_TOPIC_0000001278350057__li22000910048">Manually or automatically download a .pem private key file with the name that you specify as the key name. Store it in a secure place and click <strong id="EN-US_TOPIC_0000001278350057__b9321655175319">OK</strong>.<div class="note" id="EN-US_TOPIC_0000001278350057__note118145116483"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0000001278350057__p158141810481">This is the only chance for you to save the private key file. Keep it secure. You'll need to provide the key pair name when you create an ECS, and the corresponding private key each time you connect to the ECS through SSH.</p>
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<h1 class="topictitle1">Importing a Key Pair</h1>
<div id="body0000001278734873"><div class="section" id="EN-US_TOPIC_0000001278734873__section1597865916344"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0000001278734873__p13406323135614">You need to import a key pair in either of the following scenarios:</p>
<ul id="EN-US_TOPIC_0000001278734873__ul4158767114307"><li id="EN-US_TOPIC_0000001278734873__li1054247214303">Create a key pair using PuTTYgen and import the public key to the ECS.</li></ul>
<ul id="EN-US_TOPIC_0000001278734873__ul1480389919483"><li id="EN-US_TOPIC_0000001278734873__li5856373211153">Import the public key of an existing key pair to the ECS to let the system maintain your public key.<div class="note" id="EN-US_TOPIC_0000001278734873__note34429373192252"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0000001278734873__p45841647192116">If the public key of the existing key pair is stored by clicking <strong id="EN-US_TOPIC_0000001278734873__b63839817120">Save public key</strong> on PuTTY Key Generator, the public key cannot be imported to the management console.</p>
<p id="EN-US_TOPIC_0000001278734873__p41428907192252">If you want to use this existing key pair for remote login, see <a href="en-us_topic_0047654687.html">Why Does a Key Pair Created Using puttygen.exe Fail to Be Imported on the Management Console?</a></p>
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<div class="section" id="EN-US_TOPIC_0000001278734873__section62005706143441"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0000001278734873__ol49887931143442"><li id="EN-US_TOPIC_0000001278734873__li4261248104818">Log in to the management console.</li><li id="EN-US_TOPIC_0000001278734873__li464234814566">Click <span><img id="EN-US_TOPIC_0000001278734873__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0000001278734873__li44979101143442">Under <strong id="EN-US_TOPIC_0000001278734873__b181740554484"><span id="EN-US_TOPIC_0000001278734873__text8174165544811">Computing</span></strong>, click <strong id="EN-US_TOPIC_0000001278734873__b11174155184811">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0000001278734873__li2158728143442">In the navigation pane on the left, choose <strong id="EN-US_TOPIC_0000001278734873__b46541856518">Key Pair</strong>.</li><li id="EN-US_TOPIC_0000001278734873__li32291957143442">On the <strong id="EN-US_TOPIC_0000001278734873__b1535364720341">Key Pair Service</strong> page, click <strong id="EN-US_TOPIC_0000001278734873__b196332291428">Import Key Pair</strong>.<div class="fignone" id="EN-US_TOPIC_0000001278734873__fig30209536143442"><span class="figcap"><b>Figure 1 </b>Import Public Key</span><br><span><img id="EN-US_TOPIC_0000001278734873__image154212135343" src="en-us_image_0000001234671514.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0000001278734873__li37898602143442">Use either of the following methods to import the key pair:<ul id="EN-US_TOPIC_0000001278734873__ul4210955143442"><li id="EN-US_TOPIC_0000001278734873__li57034482143442">Selecting a file<ol type="a" id="EN-US_TOPIC_0000001278734873__ol1214990115226"><li id="EN-US_TOPIC_0000001278734873__li2371687115226">In the <strong id="EN-US_TOPIC_0000001278734873__b842352706112651">Import Key Pair</strong> dialog box of the management console, click <strong id="EN-US_TOPIC_0000001278734873__b842352706112725">Select File</strong> and select the locally stored public key file (for example, the .txt file saved in <a href="en-us_topic_0000001234335274.html#EN-US_TOPIC_0000001234335274__li18403111116343">3</a> in <a href="en-us_topic_0000001234335274.html">Creating a Key Pair Using PuTTYgen</a>).<div class="note" id="EN-US_TOPIC_0000001278734873__note2825014412158"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0000001278734873__p5292471112158">Make sure that the file to be imported is a public key file.</p>
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</li><li id="EN-US_TOPIC_0000001278734873__li36968064152326">Click <strong id="EN-US_TOPIC_0000001278734873__b3851022171115">OK</strong>.<p id="EN-US_TOPIC_0000001278734873__p53154419152328">After the public key is imported, you can change its name.</p>
</li></ol>
</li><li id="EN-US_TOPIC_0000001278734873__li37750586143442">Copying the public key content<ol type="a" id="EN-US_TOPIC_0000001278734873__ol13914245152430"><li id="EN-US_TOPIC_0000001278734873__li64384119152430">Copy the public key content from the locally stored .txt file into the <strong id="EN-US_TOPIC_0000001278734873__b186614394126">Public Key Content</strong> text box.</li><li id="EN-US_TOPIC_0000001278734873__li41017523152430">Click <strong id="EN-US_TOPIC_0000001278734873__b7807153911213">OK</strong>.</li></ol>
</li></ul>
</li></ol>
</div>
<div class="section" id="EN-US_TOPIC_0000001278734873__section6289800511384"><h4 class="sectiontitle">Helpful Links</h4><ul id="EN-US_TOPIC_0000001278734873__ul62571473163353"><li id="EN-US_TOPIC_0000001278734873__li24752671163353"><a href="en-us_topic_0019883415.html">What Should I Do If a Key Pair Cannot Be Imported?</a></li><li id="EN-US_TOPIC_0000001278734873__li65934068163353"><a href="en-us_topic_0047654687.html">Why Does a Key Pair Created Using puttygen.exe Fail to Be Imported on the Management Console?</a></li></ul>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0000001234175322.html">Key Pairs</a></div>
</div>
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<a name="EN-US_TOPIC_0000001351167793"></a><a name="EN-US_TOPIC_0000001351167793"></a>
<h1 class="topictitle1">Images</h1>
<div id="body0000001351167793"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="en-us_topic_0030828254.html">Image Types</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0048642616.html">Cloud-Init</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0092494580.html">Service Overview</a></div>
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<ol id="EN-US_TOPIC_0013771092__ol1580125031315"><li id="EN-US_TOPIC_0013771092__li158065010135">On the page providing details about the ECS, view the ECS specifications.<div class="fignone" id="EN-US_TOPIC_0013771092__fig14561414141716"><span class="figcap"><b>Figure 1 </b>Viewing ECS specifications</span><br><span><img id="EN-US_TOPIC_0013771092__image199481252184017" src="en-us_image_0121090576.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0013771092__li530413618147">Check the specifications tables in <a href="en-us_topic_0035470096.html">ECS Types</a> for the virtualization type.</li></ol>
</div>
<div class="section" id="EN-US_TOPIC_0013771092__en-us_topic_0013859511_section57753505172833"><h4 class="sectiontitle">Notes</h4><ul id="EN-US_TOPIC_0013771092__en-us_topic_0013859511_ul35475327193536"><li id="EN-US_TOPIC_0013771092__en-us_topic_0013859511_li63799810105126">If <span id="EN-US_TOPIC_0013771092__text911941164015">ECS</span> specifications are downgraded, the <span id="EN-US_TOPIC_0013771092__text13383153964912">ECS</span> performance will deteriorate.</li><li id="EN-US_TOPIC_0013771092__li344174672418">Certain ECSs do not support specifications modification currently. For details about available ECS types as well as their functions and usage, see "Notes" in <a href="en-us_topic_0035470096.html">ECS Types</a>.</li><li id="EN-US_TOPIC_0013771092__li143963249488">When the disk status is <strong id="EN-US_TOPIC_0013771092__b1045710382410">Expanding</strong>, you are not allowed to modify the specifications of the <span id="EN-US_TOPIC_0013771092__text163331642194016">ECS</span> where the disk is attached.</li><li id="EN-US_TOPIC_0013771092__li14961154101510">Before modifying the specifications of a Windows ECS, modify the SAN policy by following the instructions provided in <a href="en-us_topic_0114225937.html">Why Does a Disk Attached to a Windows ECS Go Offline?</a> to prevent disks from going offline after the specifications are modified.</li><li id="EN-US_TOPIC_0013771092__li883917325184">Before modifying specifications, make sure that the <span id="EN-US_TOPIC_0013771092__text17235243154011">ECS</span> has been stopped.</li></ul>
<div class="section" id="EN-US_TOPIC_0013771092__en-us_topic_0013859511_section57753505172833"><h4 class="sectiontitle">Notes</h4><ul id="EN-US_TOPIC_0013771092__en-us_topic_0013859511_ul35475327193536"><li id="EN-US_TOPIC_0013771092__en-us_topic_0013859511_li63799810105126">If <span id="EN-US_TOPIC_0013771092__text911941164015">ECS</span> specifications are downgraded, the <span id="EN-US_TOPIC_0013771092__text13383153964912">ECS</span> performance will deteriorate.</li><li id="EN-US_TOPIC_0013771092__li344174672418">Certain ECS types do not support specifications modification currently. For details about available ECS types as well as their functions and usage, see "Notes" in <a href="en-us_topic_0035470096.html">ECS Types</a>.</li><li id="EN-US_TOPIC_0013771092__li143963249488">When the disk status is <strong id="EN-US_TOPIC_0013771092__b1045710382410">Expanding</strong>, you are not allowed to modify the specifications of the <span id="EN-US_TOPIC_0013771092__text163331642194016">ECS</span> where the disk is attached.</li><li id="EN-US_TOPIC_0013771092__li14961154101510">Before modifying the specifications of a Windows ECS, modify the SAN policy by following the instructions provided in <a href="en-us_topic_0114225937.html">Why Does a Disk Attached to a Windows ECS Go Offline?</a> to prevent disks from going offline after the specifications are modified.</li><li id="EN-US_TOPIC_0013771092__li883917325184">Before modifying specifications, make sure that the <span id="EN-US_TOPIC_0013771092__text17235243154011">ECS</span> has been stopped.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0013771092__section997143905215"><h4 class="sectiontitle">Step 1: Modify Specifications</h4><ol id="EN-US_TOPIC_0013771092__ol97324075216"><li id="EN-US_TOPIC_0013771092__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0013771092__li464234814566">Click <span><img id="EN-US_TOPIC_0013771092__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0013771092__li17112406525">Under <strong id="EN-US_TOPIC_0013771092__b18394521181913"><span id="EN-US_TOPIC_0013771092__text13941721111916">Computing</span></strong>, click <strong id="EN-US_TOPIC_0013771092__b1839532131916">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0013771092__li117214409522">On the <strong id="EN-US_TOPIC_0013771092__b1234022165217">Elastic Cloud Server</strong> page, view the status of the target <span id="EN-US_TOPIC_0013771092__text10467144714020">ECS</span>.<p id="EN-US_TOPIC_0013771092__p144608369486">If the ECS is not in <strong id="EN-US_TOPIC_0013771092__b842352706113828">Stopped</strong> state, click <strong id="EN-US_TOPIC_0013771092__b842352706113834">More</strong> in the <strong id="EN-US_TOPIC_0013771092__b133847578419153">Operation</strong> column and select <strong id="EN-US_TOPIC_0013771092__b842352706123127">Stop</strong>.</p>
<div class="section" id="EN-US_TOPIC_0013771092__section997143905215"><h4 class="sectiontitle">Step 1: Modify Specifications</h4><ol id="EN-US_TOPIC_0013771092__ol97324075216"><li id="EN-US_TOPIC_0013771092__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0013771092__li464234814566">Click <span><img id="EN-US_TOPIC_0013771092__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0013771092__li17112406525">Under <strong id="EN-US_TOPIC_0013771092__b125682153314"><span id="EN-US_TOPIC_0013771092__text162568215330">Computing</span></strong>, click <strong id="EN-US_TOPIC_0013771092__b162560220331">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0013771092__li117214409522">On the <strong id="EN-US_TOPIC_0013771092__b1234022165217">Elastic Cloud Server</strong> page, view the status of the target <span id="EN-US_TOPIC_0013771092__text10467144714020">ECS</span>.<p id="EN-US_TOPIC_0013771092__p144608369486">If the ECS is not in <strong id="EN-US_TOPIC_0013771092__b842352706113828">Stopped</strong> state, click <strong id="EN-US_TOPIC_0013771092__b842352706113834">More</strong> in the <strong id="EN-US_TOPIC_0013771092__b133847578419153">Operation</strong> column and select <strong id="EN-US_TOPIC_0013771092__b842352706123127">Stop</strong>.</p>
</li><li id="EN-US_TOPIC_0013771092__li572184075211">Click <strong id="EN-US_TOPIC_0013771092__b25955399219229">More</strong> in the <strong id="EN-US_TOPIC_0013771092__b211788459919229">Operation</strong> column and select <strong id="EN-US_TOPIC_0013771092__b84235270619250">Modify Specifications</strong>.<p id="EN-US_TOPIC_0013771092__p20946954194414">The <strong id="EN-US_TOPIC_0013771092__b842352706172049">Modify ECS Specifications</strong> page is displayed.</p>
</li><li id="EN-US_TOPIC_0013771092__li137218401522">Select the new <span id="EN-US_TOPIC_0013771092__text1626718488409">ECS</span> type, vCPUs, and memory as prompted.</li><li id="EN-US_TOPIC_0013771092__li654534825212">(Optional) Set <strong id="EN-US_TOPIC_0013771092__b8423527062212">DeH</strong>.<p id="EN-US_TOPIC_0013771092__p196261841172818">If the ECS is created on a DeH, the system allows you to change the DeH.</p>
<p id="EN-US_TOPIC_0013771092__p1730463595012">To do so, select the target DeH from the drop-down list. If no DeH is available in the drop-down list, remaining DeH resources are insufficient and cannot be used to create the ECS with specifications modified.</p>
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</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0013771092__section9461027528"><a name="EN-US_TOPIC_0013771092__section9461027528"></a><a name="section9461027528"></a><h4 class="sectiontitle">Follow-up Procedure</h4><p id="EN-US_TOPIC_0013771092__p8156201916532">Perform the following operations in the event of a specifications modification failure:</p>
<ol id="EN-US_TOPIC_0013771092__ol8483192220537"><li id="EN-US_TOPIC_0013771092__li16375104774517">Log in to the management console.</li><li id="EN-US_TOPIC_0013771092__li206631552125313">Under <strong id="EN-US_TOPIC_0013771092__b842352706172744">Management &amp; Deployment</strong>, click <strong id="EN-US_TOPIC_0013771092__b1136051407172817">Cloud Trace Service</strong>.</li><li id="EN-US_TOPIC_0013771092__li077853845414">In the navigation pane on the left, choose <strong id="EN-US_TOPIC_0013771092__b842352706143413">Trace List</strong>.</li><li id="EN-US_TOPIC_0013771092__li104504323416">In the <strong id="EN-US_TOPIC_0013771092__b44447745514440">Trace Name</strong> column, locate the <strong id="EN-US_TOPIC_0013771092__b842352706143624">resizeServer</strong> event by resource ID.<p id="EN-US_TOPIC_0013771092__p1166001972618">The resource ID is the ID of the <span id="EN-US_TOPIC_0013771092__text169919920413">ECS</span> on which the specifications modification failed.</p>
<ol id="EN-US_TOPIC_0013771092__ol8483192220537"><li id="EN-US_TOPIC_0013771092__li16375104774517">Log in to the management console.</li><li id="EN-US_TOPIC_0013771092__li206631552125313">Under <strong id="EN-US_TOPIC_0013771092__b06511539204113">Management &amp; Deployment</strong>, click <strong id="EN-US_TOPIC_0013771092__b16652193984116">Cloud Trace Service</strong>.</li><li id="EN-US_TOPIC_0013771092__li077853845414">In the navigation pane on the left, choose <strong id="EN-US_TOPIC_0013771092__b842352706143413">Trace List</strong>.</li><li id="EN-US_TOPIC_0013771092__li104504323416">In the <strong id="EN-US_TOPIC_0013771092__b44447745514440">Trace Name</strong> column, locate the <strong id="EN-US_TOPIC_0013771092__b842352706143624">resizeServer</strong> event by resource ID.<p id="EN-US_TOPIC_0013771092__p1166001972618">The resource ID is the ID of the <span id="EN-US_TOPIC_0013771092__text169919920413">ECS</span> on which the specifications modification failed.</p>
</li><li id="EN-US_TOPIC_0013771092__li648352205319">Click <strong id="EN-US_TOPIC_0013771092__b842352706144643">View Trace</strong> in the <strong id="EN-US_TOPIC_0013771092__b842352706144646">Operation</strong> column to view the failure cause.<p id="EN-US_TOPIC_0013771092__p6736191420314">If the fault cannot be rectified based on logs, contact customer service.</p>
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<h1 class="topictitle1">What Is ECS?</h1>
<div id="body55752527"><p id="EN-US_TOPIC_0013771112__p024184315493">An Elastic Cloud Server (ECS) is a basic computing unit that consists of vCPUs, memory, OS, and Elastic Volume Service (EVS) disks. After an <span id="EN-US_TOPIC_0013771112__text852305312495">ECS</span> is created, you can use it on the cloud similarly to how you would use your local PC or physical server.</p>
<p id="EN-US_TOPIC_0013771112__p47101664518"><span id="EN-US_TOPIC_0013771112__text33411108512">ECS</span>s support self-service creation, modification, and operation. You can create an <span id="EN-US_TOPIC_0013771112__text1038617675911">ECS</span> by specifying its vCPUs, memory, OS, and login mode. After an <span id="EN-US_TOPIC_0013771112__text255114101595">ECS</span> is created, you can modify its specifications if necessary. ECS works with other services to provide a reliable, secure, efficient computing environment.</p>
<ul id="EN-US_TOPIC_0013771112__ul5683122783111"><li id="EN-US_TOPIC_0013771112__li1168311276318">For details about the operating systems supported by ECS, see <a href="en-us_topic_0030828254.html">Image Types</a>.</li><li id="EN-US_TOPIC_0013771112__li1868312710319">For details about login modes, see <a href="en-us_topic_0092494193.html">Logging In to an ECS</a>.</li></ul>
<div class="section" id="EN-US_TOPIC_0013771112__section25920740113331"><h4 class="sectiontitle">System Architecture</h4><p id="EN-US_TOPIC_0013771112__p36030326113343"><span id="EN-US_TOPIC_0013771112__text1071310409595">ECS</span> works with other products and services to provide computing, storage, and network resources. You can quickly migrate and replicate existing ECSs using images.</p>
<ul id="EN-US_TOPIC_0013771112__ul39646801113416"><li id="EN-US_TOPIC_0013771112__li49170428113458"><span id="EN-US_TOPIC_0013771112__text2515225144312">ECS</span>s can be deployed in multiple availability zones (AZs) connected with each other through an internal network. If one AZ becomes faulty, other AZs in the same region will not be affected.</li><li id="EN-US_TOPIC_0013771112__li49614826113518">With the Virtual Private Cloud (VPC) service, you can build your own dedicated network on the cloud. You can also set subnets and security groups within your VPC for further isolation. You can allow your VPC to communicate with the external network through an <span id="EN-US_TOPIC_0013771112__text9714352173411">EIP</span> (bandwidth support required).</li><li id="EN-US_TOPIC_0013771112__li860244113533">With the Image Management Service (IMS), you can use an image to create <span id="EN-US_TOPIC_0013771112__text154203210180">ECS</span>s. Alternatively, you can use an existing <span id="EN-US_TOPIC_0013771112__text145585117201">ECS</span> to create a private image and use the private image to create the same <span id="EN-US_TOPIC_0013771112__text2031834014312">ECS</span>s for rapid service deployment.</li><li id="EN-US_TOPIC_0013771112__li45571980113416">Elastic Volume Service (EVS) provides storage space and Volume Backup Service (VBS) provides data backup and restoration functions.</li><li id="EN-US_TOPIC_0013771112__li115141636122018">Cloud Eye lets you keep a close eye on the performance and resource utilization of <span id="EN-US_TOPIC_0013771112__text562624654314">ECS</span>s, ensuring <span id="EN-US_TOPIC_0013771112__text7334938142515">ECS</span> reliability and availability.</li><li id="EN-US_TOPIC_0013771112__li179651546225">Volume Backup Service (VBS) allows you to create data backups for EVS disks and use the backups to restore the EVS disks. This maximizes user data correctness and security.</li><li id="EN-US_TOPIC_0013771112__li42327332278">Cloud Server Backup Service (CSBS) backs up all EVS disks of an ECS, including the system disk and data disks, and uses the backup to restore the ECS.</li></ul>
<div class="fignone" id="EN-US_TOPIC_0013771112__fig36062790113621"><span class="figcap"><b>Figure 1 </b>System architecture</span><br><span><img class="imgResize" id="EN-US_TOPIC_0013771112__image319962452815" src="en-us_image_0071898891.png" title="Click to enlarge"></span></div>

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<a name="EN-US_TOPIC_0014250631"></a><a name="EN-US_TOPIC_0014250631"></a>
<h1 class="topictitle1">Creating a Key Pair</h1>
<div id="body1432782836438"><div class="section" id="EN-US_TOPIC_0014250631__section4859995204421"><h4 class="sectiontitle">Overview</h4><p id="EN-US_TOPIC_0014250631__p5237854719483">A key pair that consists of a public key and a private key is required for authentication when you log in to an ECS. Both the public and private keys are used for authentication. Therefore, you must use an existing key pair or create a new one for remote login authentication.</p>
<ul id="EN-US_TOPIC_0014250631__ul1480389919483"><li id="EN-US_TOPIC_0014250631__li91334411120">Creating a key pair<div class="p" id="EN-US_TOPIC_0014250631__p305358071120"><a name="EN-US_TOPIC_0014250631__li91334411120"></a><a name="li91334411120"></a>If no key pair is available, create one, in which the private key is used for login authentication. You can use either of the following methods to create a key pair:<ul id="EN-US_TOPIC_0014250631__ul4158767114307"><li id="EN-US_TOPIC_0014250631__li4071623014303">(Recommended) Create a key pair on the management console. After the creation, the public key is automatically stored in the system, and the private key is manually stored in a local directory. For details, see <a href="#EN-US_TOPIC_0014250631__section35336147204538">Creating a Key Pair on the Management Console</a>.</li><li id="EN-US_TOPIC_0014250631__li1054247214303">Create a key pair using <strong id="EN-US_TOPIC_0014250631__b104468217711">puttygen.exe</strong>. After the creation, both the public key and private key are stored locally. For details, see <a href="#EN-US_TOPIC_0014250631__section38463609165715">Creating a Key Pair Using puttygen.exe</a>. After the creation, import the key pair by following the instructions provided in <a href="#EN-US_TOPIC_0014250631__section62005706143441">Importing a Key Pair</a>. Then, the key pair can be used.</li></ul>
</div>
</li><li id="EN-US_TOPIC_0014250631__li5856373211153">Using an existing key pair<p id="EN-US_TOPIC_0014250631__p1397914811153"><a name="EN-US_TOPIC_0014250631__li5856373211153"></a><a name="li5856373211153"></a>If a key pair is available locally, for example, generated using PuTTYgen, you can import the public key on the management console so that the system maintains the public key file. For details, see <a href="#EN-US_TOPIC_0014250631__section62005706143441">Importing a Key Pair</a>.</p>
<div class="note" id="EN-US_TOPIC_0014250631__note34429373192252"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0014250631__p45841647192116">If the public key of the existing key pair is stored by clicking <strong id="EN-US_TOPIC_0014250631__b1868201019376">Save public key</strong> of <strong id="EN-US_TOPIC_0014250631__b12687510203715">puttygen.exe</strong>, the public key cannot be imported to the management console.</p>
<p id="EN-US_TOPIC_0014250631__p41428907192252">If this key pair must be used for remote authentication, see <a href="en-us_topic_0047654687.html">Why Does a Key Pair Created Using puttygen.exe Fail to Be Imported on the Management Console?</a></p>
</div></div>
</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0014250631__section57670118165256"><h4 class="sectiontitle">Constraints</h4><ul id="EN-US_TOPIC_0014250631__ul39416956165437"><li id="EN-US_TOPIC_0014250631__li5399140114047">ECSs support the following encryption algorithms:<ul id="EN-US_TOPIC_0014250631__ul6846097114050"><li id="EN-US_TOPIC_0014250631__li11916496165437">SSH-2 (RSA, 1024)</li><li id="EN-US_TOPIC_0014250631__li2309142165437">SSH-2 (RSA, 2048)</li><li id="EN-US_TOPIC_0014250631__li1825470192156">SSH-2 (RSA, 4096)</li></ul>
</li><li id="EN-US_TOPIC_0014250631__li3163843411410">The private key is one of the most important functions for protecting your <span id="EN-US_TOPIC_0014250631__text06652334361">ECS</span> during remote login. Save the private key to your local directory and keep it secure. The private key can be downloaded only once.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0014250631__section35336147204538"><a name="EN-US_TOPIC_0014250631__section35336147204538"></a><a name="section35336147204538"></a><h4 class="sectiontitle">Creating a Key Pair on the Management Console</h4><ol id="EN-US_TOPIC_0014250631__ol1373281010048"><li id="EN-US_TOPIC_0014250631__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0014250631__li0975135720214">Click <span><img id="EN-US_TOPIC_0014250631__image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0014250631__li3861581410048">Under <strong id="EN-US_TOPIC_0014250631__b57131714203614"><span id="EN-US_TOPIC_0014250631__text170715142360">Computing</span></strong>, click <strong id="EN-US_TOPIC_0014250631__b1271351416367">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0014250631__li1199800610048">In the navigation pane on the left, choose <strong id="EN-US_TOPIC_0014250631__b529216685349">Key Pair</strong>.</li><li id="EN-US_TOPIC_0014250631__li4087319010048">On the right side of the page, click <strong>Create Key Pair</strong>.</li><li id="EN-US_TOPIC_0014250631__li3231439110048">Enter the key name and click <strong id="EN-US_TOPIC_0014250631__b842352706111745">OK</strong>.<p id="EN-US_TOPIC_0014250631__p1740111712710">An automatically allocated key name consists of <strong id="EN-US_TOPIC_0014250631__b842352706111821">KeyPair-</strong> and a 4-digit random number. Change it to an easy-to-remember one, for example, <strong id="EN-US_TOPIC_0014250631__b842352706111955">KeyPair-xxxx_ecs</strong>.</p>
</li><li id="EN-US_TOPIC_0014250631__li22000910048">Manually or automatically download the private key file. The file name is the specified key pair name with a suffix of .pem. Securely store the private key file. In the displayed dialog box, click <strong id="EN-US_TOPIC_0014250631__b1734242054153732">OK</strong>.<div class="note" id="EN-US_TOPIC_0014250631__note118145116483"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0014250631__p158141810481">This is the only opportunity for you to save the private key file. Keep it secure. When creating an <span id="EN-US_TOPIC_0014250631__text202771223103810">ECS</span>, provide the name of your desired key pair. Each time you log in to the <span id="EN-US_TOPIC_0014250631__text12825232383">ECS</span> using SSH, provide the private key.</p>
</div></div>
</li></ol>
</div>
<div class="section" id="EN-US_TOPIC_0014250631__section38463609165715"><a name="EN-US_TOPIC_0014250631__section38463609165715"></a><a name="section38463609165715"></a><h4 class="sectiontitle">Creating a Key Pair Using <strong id="EN-US_TOPIC_0014250631__b1274453433161744">puttygen.exe</strong></h4><ol id="EN-US_TOPIC_0014250631__en-us_topic_0037960038_ol1236320615580"><li id="EN-US_TOPIC_0014250631__li2796152434413"><span>Download and install PuTTY and PuTTYgen.</span><p><p id="EN-US_TOPIC_0014250631__p1679692494411"><a href="https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html" target="_blank" rel="noopener noreferrer">https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html</a></p>
<div class="note" id="EN-US_TOPIC_0014250631__note45922157111724"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0014250631__p10646236111724">PuTTYgen is a key generator, which is used to create a key pair that consists of a public key and a private key for PuTTY.</p>
</div></div>
</p></li><li id="EN-US_TOPIC_0014250631__en-us_topic_0037960038_li14408360155813"><span>Obtain the public and private keys.</span><p><ol type="a" id="EN-US_TOPIC_0014250631__en-us_topic_0037960038_ol25604984155818"><li id="EN-US_TOPIC_0014250631__en-us_topic_0037960038_li149523815580">Double-click <strong id="EN-US_TOPIC_0014250631__b842352706202157">puttygen.exe</strong> to switch to the <strong id="EN-US_TOPIC_0014250631__b842352706202217">PuTTY Key Generator</strong> page.<div class="fignone" id="EN-US_TOPIC_0014250631__en-us_topic_0037960038_fig4490538015580"><span class="figcap"><b>Figure 1 </b>PuTTY Key Generator</span><br><span><img id="EN-US_TOPIC_0014250631__image1085155834213" src="en-us_image_0272917695.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0014250631__en-us_topic_0037960038_li5400542415580">Click <strong id="EN-US_TOPIC_0014250631__b842352706202244">Generate</strong>.<p id="EN-US_TOPIC_0014250631__en-us_topic_0037960038_p1345714315580">The key generator automatically generates a key pair that consists of a public key and a private key. The public key is shown in the red box in <a href="#EN-US_TOPIC_0014250631__en-us_topic_0037960038_fig4678746517750">Figure 2</a>.</p>
<div class="fignone" id="EN-US_TOPIC_0014250631__en-us_topic_0037960038_fig4678746517750"><a name="EN-US_TOPIC_0014250631__en-us_topic_0037960038_fig4678746517750"></a><a name="en-us_topic_0037960038_fig4678746517750"></a><span class="figcap"><b>Figure 2 </b>Obtaining the public and private keys</span><br><span><img id="EN-US_TOPIC_0014250631__image17566352204514" src="en-us_image_0272919399.png"></span></div>
</li></ol>
</p></li><li id="EN-US_TOPIC_0014250631__li24584709151818"><a name="EN-US_TOPIC_0014250631__li24584709151818"></a><a name="li24584709151818"></a><span>Copy the public key content to a .txt file and save the file in a local directory.</span><p><div class="note" id="EN-US_TOPIC_0014250631__note31016447113457"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0014250631__p4928242511355">Do not save the public key by clicking <strong id="EN-US_TOPIC_0014250631__b842352706202716">Save public key</strong>. Storing a public key by clicking <strong id="EN-US_TOPIC_0014250631__b610903815387">Save public key</strong> of <strong id="EN-US_TOPIC_0014250631__b91136381385">puttygen.exe</strong> will change the format of the public key content. Such a key cannot be imported to the management console.</p>
</div></div>
</p></li><li id="EN-US_TOPIC_0014250631__li428232215217"><span>Save the private key and keep it secure. The private key can be downloaded only once.</span><p><p id="EN-US_TOPIC_0014250631__en-us_topic_0014250631_p14390612143442">The format in which to save your private key varies depending on application scenarios:</p>
<ul id="EN-US_TOPIC_0014250631__en-us_topic_0014250631_ul484510143442"><li id="EN-US_TOPIC_0014250631__en-us_topic_0014250631_li18866571143442">Saving the private key in .ppk format<div class="p" id="EN-US_TOPIC_0014250631__en-us_topic_0014250631_p61748609143442"><a name="EN-US_TOPIC_0014250631__en-us_topic_0014250631_li18866571143442"></a><a name="en-us_topic_0014250631_li18866571143442"></a>When you are required to log in to a Linux <span id="EN-US_TOPIC_0014250631__text5829165813815">ECS</span> using PuTTY, you must use the .ppk private key. To save the private key in .ppk format, perform the following operations:<ol type="a" id="EN-US_TOPIC_0014250631__en-us_topic_0014250631_ol21774037143442"><li id="EN-US_TOPIC_0014250631__en-us_topic_0014250631_li62406652143442">On the <strong id="EN-US_TOPIC_0014250631__b842352706204219">PuTTY Key Generator</strong> page, choose <strong id="EN-US_TOPIC_0014250631__b842352706163532">File</strong> &gt; <strong id="EN-US_TOPIC_0014250631__b842352706204231">Save private key</strong>.<div class="fignone" id="EN-US_TOPIC_0014250631__fig1031955919299"><span class="figcap"><b>Figure 3 </b>Save private key</span><br><span><img id="EN-US_TOPIC_0014250631__image1836618020521" src="en-us_image_0276033982.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0014250631__en-us_topic_0014250631_li24788958143442">Save the converted private key, for example, <strong>kp-123.ppk</strong>, in a local directory.</li></ol>
</div>
</li><li id="EN-US_TOPIC_0014250631__en-us_topic_0014250631_li22423455143442">Saving the private key in .pem format<div class="p" id="EN-US_TOPIC_0014250631__en-us_topic_0014250631_p2491495143442"><a name="EN-US_TOPIC_0014250631__en-us_topic_0014250631_li22423455143442"></a><a name="en-us_topic_0014250631_li22423455143442"></a>When you are required to log in to a Linux <span id="EN-US_TOPIC_0014250631__text81081319203912">ECS</span> using Xshell or attempt to obtain the password for logging in to a Windows <span id="EN-US_TOPIC_0014250631__text511371963911">ECS</span>, you must use the .pem private key for authentication. To save the private key in .pem format, perform the following operations:<ol type="a" id="EN-US_TOPIC_0014250631__en-us_topic_0014250631_ol45016075143442"><li id="EN-US_TOPIC_0014250631__en-us_topic_0014250631_li63522095143442">Choose <strong id="EN-US_TOPIC_0014250631__b842352706204526">Conversions</strong> &gt; <strong id="EN-US_TOPIC_0014250631__b842352706204529">Export OpenSSH key</strong>.<div class="note" id="EN-US_TOPIC_0014250631__note101379875915"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0014250631__p0137118165910">If you use this private file to obtain the password for logging in to a Windows <span id="EN-US_TOPIC_0014250631__text22401225153918">ECS</span>, when you choose <strong id="EN-US_TOPIC_0014250631__b924592520394">Export OpenSSH key</strong>, do not configure <strong id="EN-US_TOPIC_0014250631__b1624592516399">Key passphrase</strong>. Otherwise, obtaining the password will fail.</p>
</div></div>
<div class="fignone" id="EN-US_TOPIC_0014250631__fig15752222153016"><span class="figcap"><b>Figure 4 </b>Export OpenSSH key</span><br><span><img id="EN-US_TOPIC_0014250631__image14824133144713" src="en-us_image_0272919409.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0014250631__en-us_topic_0014250631_li34827947143442">Save the private key, for example, <strong>kp-123.pem</strong>, in a local directory.</li></ol>
</div>
</li></ul>
</p></li><li id="EN-US_TOPIC_0014250631__li48664209151053"><span>Import the public key to the system. For details, see "Copying the public key content" in <a href="#EN-US_TOPIC_0014250631__section62005706143441">Importing a Key Pair</a>.</span></li></ol>
</div>
<div class="section" id="EN-US_TOPIC_0014250631__section62005706143441"><a name="EN-US_TOPIC_0014250631__section62005706143441"></a><a name="section62005706143441"></a><h4 class="sectiontitle">Importing a Key Pair</h4><p id="EN-US_TOPIC_0014250631__p1114017312139">If you store a public key by clicking <strong id="EN-US_TOPIC_0014250631__b26562066164826">Save public key</strong> of <strong id="EN-US_TOPIC_0014250631__b37732003164826">puttygen.exe</strong>, the format of the public key content will change. Such a key cannot be imported to the management console. To resolve this issue, obtain the public key content in correct format and import the content to the management console. For details, see <a href="en-us_topic_0047654687.html">Why Does a Key Pair Created Using puttygen.exe Fail to Be Imported on the Management Console?</a></p>
<ol id="EN-US_TOPIC_0014250631__ol49887931143442"><li id="EN-US_TOPIC_0014250631__li4261248104818">Log in to the management console.</li><li id="EN-US_TOPIC_0014250631__li464234814566">Click <span><img id="EN-US_TOPIC_0014250631__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0014250631__li44979101143442">Under <strong id="EN-US_TOPIC_0014250631__b74181224203614"><span id="EN-US_TOPIC_0014250631__text241212473617">Computing</span></strong>, click <strong id="EN-US_TOPIC_0014250631__b20419142493611">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0014250631__li2158728143442">In the navigation pane on the left, choose <strong id="EN-US_TOPIC_0014250631__b603973981">Key Pair</strong>.</li><li id="EN-US_TOPIC_0014250631__li32291957143442">On the right side of the page, click <strong id="EN-US_TOPIC_0014250631__b1997011165238">Import Key Pair</strong>.<div class="fignone" id="EN-US_TOPIC_0014250631__fig30209536143442"><span class="figcap"><b>Figure 5 </b>Import Key Pair</span><br><span><img id="EN-US_TOPIC_0014250631__image154212135343" src="en-us_image_0037980515.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0014250631__li37898602143442">Use either of the following methods to import the key pair:<ul id="EN-US_TOPIC_0014250631__ul4210955143442"><li id="EN-US_TOPIC_0014250631__li57034482143442">Selecting a file<ol type="a" id="EN-US_TOPIC_0014250631__ol1214990115226"><li id="EN-US_TOPIC_0014250631__li2371687115226">On the <strong id="EN-US_TOPIC_0014250631__b842352706112651">Import Key Pair</strong> page of the management console, click <strong id="EN-US_TOPIC_0014250631__b842352706112725">Select File</strong> and select the local public key file, for example, the .txt file saved in <a href="#EN-US_TOPIC_0014250631__li24584709151818">3</a>.<div class="note" id="EN-US_TOPIC_0014250631__note2825014412158"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0014250631__p5292471112158">When importing a key pair, ensure that the public key is imported. Otherwise, the importing will fail.</p>
</div></div>
</li><li id="EN-US_TOPIC_0014250631__li36968064152326">Click <strong id="EN-US_TOPIC_0014250631__b842352706162957">OK</strong>.<p id="EN-US_TOPIC_0014250631__p53154419152328">After the public key is imported, you can change its name.</p>
</li></ol>
</li><li id="EN-US_TOPIC_0014250631__li37750586143442">Copying the public key content<ol type="a" id="EN-US_TOPIC_0014250631__ol13914245152430"><li id="EN-US_TOPIC_0014250631__li64384119152430">Copy the content of the public key in .txt file into the <strong id="EN-US_TOPIC_0014250631__b1789216345163526">Public Key Content</strong> text box.</li><li id="EN-US_TOPIC_0014250631__li41017523152430">Click <strong id="EN-US_TOPIC_0014250631__b1395011615">OK</strong>.</li></ol>
</li></ul>
</li></ol>
</div>
<div class="section" id="EN-US_TOPIC_0014250631__section6289800511384"><h4 class="sectiontitle">Helpful Links</h4><ul id="EN-US_TOPIC_0014250631__ul62571473163353"><li id="EN-US_TOPIC_0014250631__li24752671163353"><a href="en-us_topic_0019883415.html">What Should I Do If a Key Pair Cannot Be Imported?</a></li><li id="EN-US_TOPIC_0014250631__li65934068163353"><a href="en-us_topic_0047654687.html">Why Does a Key Pair Created Using puttygen.exe Fail to Be Imported on the Management Console?</a></li></ul>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0140313881.html">Passwords and Key Pairs</a></div>
</div>
</div>
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<div id="body1435883576187"><div class="section" id="EN-US_TOPIC_0017130261__section3759917014179"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0017130261__p2563394814179">After obtaining <span id="EN-US_TOPIC_0017130261__text95540359913">ECS</span>s, you can view and manage them on the management console. This section describes how to view detailed <span id="EN-US_TOPIC_0017130261__text128503371694">ECS</span> configurations, including its name, image, system disk, data disks, VPC, NIC, security group, and <span id="EN-US_TOPIC_0017130261__text1950318107244">EIP</span>.</p>
<p id="EN-US_TOPIC_0017130261__p1177410251818">To view the private IP address of an <span id="EN-US_TOPIC_0017130261__text732212402912">ECS</span>, view it on the <strong id="EN-US_TOPIC_0017130261__b143545713161">Elastic Cloud Server</strong> page.</p>
</div>
<div class="section" id="EN-US_TOPIC_0017130261__section2937894314179"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0017130261__ol3088417414179"><li id="EN-US_TOPIC_0017130261__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0017130261__li464234814566">Click <span><img id="EN-US_TOPIC_0017130261__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0017130261__li1859019014179">Under <strong id="EN-US_TOPIC_0017130261__b842352706201456"><span id="EN-US_TOPIC_0017130261__text5631375258">Computing</span></strong>, click <strong id="EN-US_TOPIC_0017130261__b84235270620150">Elastic Cloud Server</strong>.<p id="EN-US_TOPIC_0017130261__p28383428216">The <strong id="EN-US_TOPIC_0017130261__b85561016131711">Elastic Cloud Server</strong> page is displayed. On this page, you can view your <span id="EN-US_TOPIC_0017130261__text1482614432912">ECS</span>s and the basic information about the <span id="EN-US_TOPIC_0017130261__text1330252917175">ECS</span>s, such as their private IP addresses.</p>
<div class="section" id="EN-US_TOPIC_0017130261__section2937894314179"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0017130261__ol3088417414179"><li id="EN-US_TOPIC_0017130261__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0017130261__li464234814566">Click <span><img id="EN-US_TOPIC_0017130261__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0017130261__li1859019014179">Under <strong id="EN-US_TOPIC_0017130261__b8330141310221"><span id="EN-US_TOPIC_0017130261__text1433051312215">Computing</span></strong>, click <strong id="EN-US_TOPIC_0017130261__b1033001312223">Elastic Cloud Server</strong>.<p id="EN-US_TOPIC_0017130261__p28383428216">The <strong id="EN-US_TOPIC_0017130261__b85561016131711">Elastic Cloud Server</strong> page is displayed. On this page, you can view your <span id="EN-US_TOPIC_0017130261__text1482614432912">ECS</span>s and the basic information about the <span id="EN-US_TOPIC_0017130261__text1330252917175">ECS</span>s, such as their private IP addresses.</p>
</li><li id="EN-US_TOPIC_0017130261__li5741957114179">In the search box above the <span id="EN-US_TOPIC_0017130261__text16466347993">ECS</span> list, enter the <span id="EN-US_TOPIC_0017130261__text8946165115172">ECS</span> name, IP address, or ID, and click <span><img id="EN-US_TOPIC_0017130261__image13405105333511" src="en-us_image_0128851621.png"></span> for search. Alternatively, click <strong id="EN-US_TOPIC_0017130261__b4944133418426">Search by Tag</strong> above the upper right corner of the ECS list and search for an ECS by tag key and value.</li><li id="EN-US_TOPIC_0017130261__li1472787014179">Click the name of the target <span id="EN-US_TOPIC_0017130261__text83910499918">ECS</span>.<p id="EN-US_TOPIC_0017130261__p216070221280">The page providing details about the <span id="EN-US_TOPIC_0017130261__text0939849496">ECS</span> is displayed.</p>
</li><li id="EN-US_TOPIC_0017130261__li5210683614179">View the <span id="EN-US_TOPIC_0017130261__text17922750899">ECS</span> details.<p id="EN-US_TOPIC_0017130261__p4939654514179">You can modify <span id="EN-US_TOPIC_0017130261__text153151152693">ECS</span> configurations, for example, change its security group, add a NIC or tag to it, or bind an <span id="EN-US_TOPIC_0017130261__text13811637134719">EIP</span> to it, by clicking corresponding links or buttons.</p>
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<h1 class="topictitle1">Login Using an SSH Key</h1>
<div id="body1437210781593"><div class="section" id="EN-US_TOPIC_0017955380__section1547194115913"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0017955380__p112185456913">This section describes how to remotely log in to a Linux ECS using an SSH key pair from Windows and Linux, respectively.</p>
</div>
<div class="section" id="EN-US_TOPIC_0017955380__section6801971111724"><h4 class="sectiontitle">Prerequisites</h4><ul id="EN-US_TOPIC_0017955380__ul14088797111724"><li id="EN-US_TOPIC_0017955380__li8057630204858">You have obtained the private key file used during <span id="EN-US_TOPIC_0017955380__text1710831620141">ECS</span> creation.</li><li id="EN-US_TOPIC_0017955380__li59690312111724">You have bound an <span id="EN-US_TOPIC_0017955380__text1281813161820">EIP</span> to the <span id="EN-US_TOPIC_0017955380__text1881818161127">ECS</span>. For details, see <a href="en-us_topic_0017130261.html">Viewing Details About an ECS</a>.</li></ul>
<div class="section" id="EN-US_TOPIC_0017955380__section6801971111724"><h4 class="sectiontitle">Prerequisites</h4><ul id="EN-US_TOPIC_0017955380__ul14088797111724"><li id="EN-US_TOPIC_0017955380__li8057630204858">You have obtained the private key file used for creating the ECS. For details about how to create a key pair, see <a href="en-us_topic_0000001278350057.html">(Recommended) Creating a Key Pair on the Management Console</a>.</li><li id="EN-US_TOPIC_0017955380__li59690312111724">You have bound an <span id="EN-US_TOPIC_0017955380__text1281813161820">EIP</span> to the <span id="EN-US_TOPIC_0017955380__text1881818161127">ECS</span>. For details, see <a href="en-us_topic_0017130261.html">Viewing Details About an ECS</a>.</li></ul>
</div>
<ul id="EN-US_TOPIC_0017955380__ul341899111724"><li id="EN-US_TOPIC_0017955380__li3077095111724">You have configured the inbound rules of the security group. For details, see <a href="en-us_topic_0030878383.html">Configuring Security Group Rules</a>.</li><li id="EN-US_TOPIC_0017955380__li23377058164348">The network connection between the login tool (PuTTY) and the target <span id="EN-US_TOPIC_0017955380__text912922101412">ECS</span> is normal. For example, the default port 22 is not blocked by the firewall.</li></ul>
<div class="section" id="EN-US_TOPIC_0017955380__section47918167111724"><a name="EN-US_TOPIC_0017955380__section47918167111724"></a><a name="section47918167111724"></a><h4 class="sectiontitle">Logging In to the Linux ECS from Local Windows</h4><p id="EN-US_TOPIC_0017955380__p56166336111724">To log in to the Linux <span id="EN-US_TOPIC_0017955380__text9196132313143">ECS</span> from local Windows, perform the operations described in this section.</p>

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<div class="notice" id="EN-US_TOPIC_0017955633__note411052861612"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="EN-US_TOPIC_0017955633__p3007142694710">Logging in to a Linux ECS using SSH password authentication is disabled by default. If you require password authentication, configure it after logging in to the ECS. To ensure system security, reset the common user password for logging in to the Linux ECS after configuring SSH password authentication.</p>
</div></div>
</div>
<div class="section" id="EN-US_TOPIC_0017955633__section58260650112020"><h4 class="sectiontitle">Prerequisites</h4><ul id="EN-US_TOPIC_0017955633__ul21492248112020"><li id="EN-US_TOPIC_0017955633__li1586644205812">The target <span id="EN-US_TOPIC_0017955633__text69091938182114">ECS</span> is running.</li><li id="EN-US_TOPIC_0017955633__li59212509112020">You have bound an <span id="EN-US_TOPIC_0017955633__text7116102416277">EIP</span> to the <span id="EN-US_TOPIC_0017955633__text61167244273">ECS</span>. For details, see <a href="en-us_topic_0174917535.html">Binding an EIP</a>.</li></ul>
<div class="section" id="EN-US_TOPIC_0017955633__section58260650112020"><h4 class="sectiontitle">Prerequisites</h4><ul id="EN-US_TOPIC_0017955633__ul21492248112020"><li id="EN-US_TOPIC_0017955633__li1586644205812">The target <span id="EN-US_TOPIC_0017955633__text69091938182114">ECS</span> is running.</li><li id="EN-US_TOPIC_0017955633__li59212509112020">You have bound an <span id="EN-US_TOPIC_0017955633__text1391705314108">EIP</span> to the <span id="EN-US_TOPIC_0017955633__text8923853161019">ECS</span>. For details, see <a href="en-us_topic_0174917535.html">Binding an EIP</a>.</li></ul>
<ul id="EN-US_TOPIC_0017955633__ul63150538112020"><li id="EN-US_TOPIC_0017955633__li31483937112020">Access to port 22 is allowed in the inbound direction of the security group to which the ECS belongs. For details, see <a href="en-us_topic_0030878383.html">Configuring Security Group Rules</a>.</li><li id="EN-US_TOPIC_0017955633__li12606704164652">The network connection between the login tool (PuTTY) and the target <span id="EN-US_TOPIC_0017955633__text19843161218228">ECS</span> is normal. For example, the default port 22 is not blocked by the firewall.</li><li id="EN-US_TOPIC_0017955633__li5618120217032">You have obtained the SSH login permission and reset the common user password for logging in to the Linux ECS. For details, see <a href="#EN-US_TOPIC_0017955633__section6207684794951">Configuring the Login Permission Using SSH Password Authentication</a>.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0017955633__section6207684794951"><a name="EN-US_TOPIC_0017955633__section6207684794951"></a><a name="section6207684794951"></a><h4 class="sectiontitle">Configuring the Login Permission Using SSH Password Authentication</h4><p id="EN-US_TOPIC_0017955633__p38147731233149"><strong id="EN-US_TOPIC_0017955633__b1645685255112658">Assigning the remote login permission using SSH key authentication</strong></p>

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</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0018073218.html">What Happens After I Click the Delete Button?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0018073221.html">Can I Provision an ECS I Deleted?</a></strong><br>
<li class="ulchildlink"><strong><a href="en-us_topic_0018073221.html">Can a Deleted ECS Be Provisioned Again?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0029792884.html">Can I Forcibly Restart or Stop an ECS?</a></strong><br>
</li>

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<td class="cellrowborder" valign="top" width="16.41%" headers="mcps1.3.1.2.2.3.2.5.1.3 "><p id="EN-US_TOPIC_0018073215__p18413105011504">59</p>
</td>
<td class="cellrowborder" valign="top" width="48.92%" headers="mcps1.3.1.2.2.3.2.5.1.4 "><p id="EN-US_TOPIC_0018073215__p2413115045016">VBD disks + SCSI disks ≤ 60 (This constraint does not apply to local disks.)</p>
<p id="EN-US_TOPIC_0018073215__p341335020502">The number of local disks is determined based on the <span id="EN-US_TOPIC_0018073215__text494046976">ECS</span> flavor.</p>
<p id="EN-US_TOPIC_0018073215__p341335020502">The number of local disks is determined based on the <span id="EN-US_TOPIC_0018073215__text1518108793">ECS</span> flavor.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0018073215__row17413145010507"><td class="cellrowborder" valign="top" width="18.6%" headers="mcps1.3.1.2.2.3.2.5.1.1 "><p id="EN-US_TOPIC_0018073215__p3413050125016">D2</p>
@ -31,7 +31,7 @@
<td class="cellrowborder" valign="top" width="16.41%" headers="mcps1.3.1.2.2.3.2.5.1.3 "><p id="EN-US_TOPIC_0018073215__p141345010506">30</p>
</td>
<td class="cellrowborder" valign="top" width="48.92%" headers="mcps1.3.1.2.2.3.2.5.1.4 "><p id="EN-US_TOPIC_0018073215__p64135501508">VBD disks + SCSI disks ≤ 54 (This constraint does not apply to local disks.)</p>
<p id="EN-US_TOPIC_0018073215__p17413550145015">The number of local disks is determined based on the <span id="EN-US_TOPIC_0018073215__text1404419106">ECS</span> flavor.</p>
<p id="EN-US_TOPIC_0018073215__p17413550145015">The number of local disks is determined based on the <span id="EN-US_TOPIC_0018073215__text275181818">ECS</span> flavor.</p>
</td>
</tr>
</tbody>

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<p id="EN-US_TOPIC_0018073216__p30721816164524"><strong id="EN-US_TOPIC_0018073216__b84235270601921">Example 2:</strong></p>
<p id="EN-US_TOPIC_0018073216__p55315599164548">Based on example 1, if you are required to enable routing for default public network traffic through standby NIC <strong id="EN-US_TOPIC_0018073216__b7037019810216">eth1</strong>, perform the following operations to configure a route:</p>
<ol id="EN-US_TOPIC_0018073216__ol16816170164734"><li id="EN-US_TOPIC_0018073216__li56130240164734">Log in to the <span id="EN-US_TOPIC_0018073216__text66355316182">ECS</span>.</li><li id="EN-US_TOPIC_0018073216__li51081423164738">Run the following command to delete the default route:<p id="EN-US_TOPIC_0018073216__p49989555164813"><a name="EN-US_TOPIC_0018073216__li51081423164738"></a><a name="li51081423164738"></a><strong id="EN-US_TOPIC_0018073216__b62521877164816">ip route delete default</strong></p>
<div class="notice" id="EN-US_TOPIC_0018073216__note1762381210332"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="EN-US_TOPIC_0018073216__p96231412163313">Exercise caution when deleting the default route because this operation will interrupt the network and result in SSH login failures.</p>
</div></div>
</li><li id="EN-US_TOPIC_0018073216__li16873338164820">Run the following command to configure a new default route:<p id="EN-US_TOPIC_0018073216__p2759619316498"><a name="EN-US_TOPIC_0018073216__li16873338164820"></a><a name="li16873338164820"></a><strong id="EN-US_TOPIC_0018073216__b7933526124213">ip route add 0.0.0.0/0 dev eth1 via 192.168.2.1</strong></p>
<p id="EN-US_TOPIC_0018073216__p52517685164934">In the preceding command, <strong id="EN-US_TOPIC_0018073216__b1965872420">192.168.2.1</strong> is the gateway IP address of standby NIC <strong id="EN-US_TOPIC_0018073216__b706638583">eth1</strong>.</p>
<p id="EN-US_TOPIC_0018073216__p52517685164934">In the preceding command, <strong id="EN-US_TOPIC_0018073216__b1444089939">192.168.2.1</strong> is the gateway IP address of standby NIC <strong id="EN-US_TOPIC_0018073216__b64828729">eth1</strong>.</p>
</li></ol>
</div>
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<h1 class="topictitle1">What Happens After I Click the <strong id="b15960720173416">Delete</strong> Button?</h1>
<div id="body1437550181838"><p id="EN-US_TOPIC_0018073218__p27630372203410">After you click <strong id="EN-US_TOPIC_0018073218__b9261203111817">Delete</strong>, the selected <span id="EN-US_TOPIC_0018073218__text10379010389">ECS</span> is deleted. You can also choose to delete the EVS disk and <span id="EN-US_TOPIC_0018073218__text113815545712">EIP</span> of the <span id="EN-US_TOPIC_0018073218__text256951931817">ECS</span>. If you do not delete them, they will be retained. If necessary, you can manually delete them later.</p>
<p id="EN-US_TOPIC_0018073218__p22999252173018">To delete an <span id="EN-US_TOPIC_0018073218__text15419162273818">ECS</span>, perform the following operations:</p>
<ol id="EN-US_TOPIC_0018073218__ol20435070172850"><li id="EN-US_TOPIC_0018073218__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0018073218__li4282974172855">Under <strong id="EN-US_TOPIC_0018073218__b153231310194514"><span id="EN-US_TOPIC_0018073218__text631185714340">Computing</span></strong>, click <strong id="EN-US_TOPIC_0018073218__b163231010104514">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0018073218__li13480705172913">Select the <span id="EN-US_TOPIC_0018073218__text357813243382">ECS</span> to be deleted.</li><li id="EN-US_TOPIC_0018073218__li7501782172954">In the upper part of the <span id="EN-US_TOPIC_0018073218__text13282132516380">ECS</span> list, click <strong id="EN-US_TOPIC_0018073218__b063323818192">Delete</strong>.</li></ol>
<ol id="EN-US_TOPIC_0018073218__ol20435070172850"><li id="EN-US_TOPIC_0018073218__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0018073218__li4282974172855">Under <strong id="EN-US_TOPIC_0018073218__b117271848163518"><span id="EN-US_TOPIC_0018073218__text1727174813350">Computing</span></strong>, click <strong id="EN-US_TOPIC_0018073218__b5727144823520">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0018073218__li13480705172913">Select the <span id="EN-US_TOPIC_0018073218__text357813243382">ECS</span> to be deleted.</li><li id="EN-US_TOPIC_0018073218__li7501782172954">In the upper part of the <span id="EN-US_TOPIC_0018073218__text13282132516380">ECS</span> list, click <strong id="EN-US_TOPIC_0018073218__b063323818192">Delete</strong>.</li></ol>
</div>
<div>
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<a name="EN-US_TOPIC_0018073221"></a><a name="EN-US_TOPIC_0018073221"></a>
<h1 class="topictitle1">Can I Provision an ECS I Deleted?</h1>
<h1 class="topictitle1">Can a Deleted <span id="text67001855114819">ECS</span> Be Provisioned Again?</h1>
<div id="body1437550181838"><p id="EN-US_TOPIC_0018073221__p5461115135513">No. <span id="EN-US_TOPIC_0018073221__text1798018592551">ECS</span>s in the <strong id="EN-US_TOPIC_0018073221__b837513162719">Deleted</strong> state cannot provide services and are soon removed from the system.</p>
<p id="EN-US_TOPIC_0018073221__p24653502171051">A deleted <span id="EN-US_TOPIC_0018073221__text36221647175611">ECS</span> is retained in the <span id="EN-US_TOPIC_0018073221__text88085500564">ECS</span> list on the management console only for a short period of time before it is permanently removed from the system. You can create a new <span id="EN-US_TOPIC_0018073221__text735835123814">ECS</span> with the same specifications again.</p>
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<a name="EN-US_TOPIC_0018078522"></a><a name="EN-US_TOPIC_0018078522"></a>
<h1 class="topictitle1">Can I Change the OS of an <span id="text1845112135413">ECS</span>?</h1>
<div id="body1437566841621"><p id="EN-US_TOPIC_0018078522__p24003387154450">Yes. You can change the OS of an <span id="EN-US_TOPIC_0018078522__text7826195373617">ECS</span>.</p>
<div id="body1437566841621"><p id="EN-US_TOPIC_0018078522__p24003387154450">Yes, you can change the OS of an ECS.</p>
<p id="EN-US_TOPIC_0018078522__p66171416105918">If the OS running on an ECS cannot meet service requirements, for example, a higher OS version is required, you can change the ECS OS.</p>
<p id="EN-US_TOPIC_0018078522__p2272727415483">For instructions about how to change an ECS OS, see <a href="en-us_topic_0031523135.html">Changing the OS</a>.</p>
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<h1 class="topictitle1">Why Does an Authentication Failure Occurs After I Attempt to Remotely Log In to a Windows ECS?</h1>
<div id="body1438216771584"><div class="section" id="EN-US_TOPIC_0018339851__section142338358917"><h4 class="sectiontitle">Symptom</h4><p id="EN-US_TOPIC_0018339851__p17625338093">When a local computer running Windows attempts to access a Windows <span id="EN-US_TOPIC_0018339851__text1572112818383">ECS</span> using RDP (for example, MSTSC), an identity authentication failure occurs and the desired function is not supported.</p>
<ul id="EN-US_TOPIC_0018339851__ul147821152174920"><li id="EN-US_TOPIC_0018339851__li17822052124915">If the error message contains only the information that an identity authentication failure occurs and that the desired function is not supported, rectify the fault by following the instructions provided in <a href="#EN-US_TOPIC_0018339851__section9947102411203">Solution</a>.</li><li id="EN-US_TOPIC_0018339851__li107821052184912">If the error message shows that the fault was caused by "CredSSP Encryption Oracle Remediation", as shown in <a href="#EN-US_TOPIC_0018339851__fig18932134871212">Figure 1</a>, the fault may be caused by a security patch released by Microsoft in March 2018. This patch may affect RDP-based CredSSP connections. As a result, setting up RDP-based connections to <span id="EN-US_TOPIC_0018339851__text20735113415385">ECS</span>s failed. For details, see <a href="https://blogs.technet.microsoft.com/mckittrick/unable-to-rdp-to-virtual-machine-credssp-encryption-oracle-remediation/" target="_blank" rel="noopener noreferrer">Unable to RDP to Virtual Machine: CredSSP Encryption Oracle Remediation</a>. Rectify the fault by following the instructions provided in <a href="https://support.microsoft.com/en-us/help/4093492/credssp-updates-for-cve-2018-0886-march-13-2018" target="_blank" rel="noopener noreferrer">official Microsoft document</a>.<div class="fignone" id="EN-US_TOPIC_0018339851__fig18932134871212"><a name="EN-US_TOPIC_0018339851__fig18932134871212"></a><a name="fig18932134871212"></a><span class="figcap"><b>Figure 1 </b>Failed to set up a remote desktop connection</span><br><span><img id="EN-US_TOPIC_0018339851__image12932114801211" src="en-us_image_0117334497.png"></span></div>
<ul id="EN-US_TOPIC_0018339851__ul147821152174920"><li id="EN-US_TOPIC_0018339851__li17822052124915">If the error message contains only the information that an identity authentication failure occurs and that the desired function is not supported, rectify the fault by following the instructions provided in <a href="#EN-US_TOPIC_0018339851__section9947102411203">Solution</a>.</li><li id="EN-US_TOPIC_0018339851__li107821052184912">If the error message shows that the fault was caused by "CredSSP Encryption Oracle Remediation", as shown in <a href="#EN-US_TOPIC_0018339851__fig18932134871212">Figure 1</a>, the fault may be caused by a security patch released by Microsoft in March 2018. This patch may affect RDP-based CredSSP connections. As a result, setting up RDP-based connections to <span id="EN-US_TOPIC_0018339851__text20735113415385">ECS</span>s failed. Rectify the fault by following the instructions provided in <a href="https://support.microsoft.com/en-us/topic/credssp-updates-for-cve-2018-0886-5cbf9e5f-dc6d-744f-9e97-7ba400d6d3ea" target="_blank" rel="noopener noreferrer">Microsoft documents</a>.<div class="fignone" id="EN-US_TOPIC_0018339851__fig18932134871212"><a name="EN-US_TOPIC_0018339851__fig18932134871212"></a><a name="fig18932134871212"></a><span class="figcap"><b>Figure 1 </b>Failed to set up a remote desktop connection</span><br><span><img id="EN-US_TOPIC_0018339851__image12932114801211" src="en-us_image_0117334497.png"></span></div>
</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0018339851__section9947102411203"><a name="EN-US_TOPIC_0018339851__section9947102411203"></a><a name="section9947102411203"></a><h4 class="sectiontitle">Solution</h4><p id="EN-US_TOPIC_0018339851__p466323910257">Modify the remote desktop connection settings on the Windows <span id="EN-US_TOPIC_0018339851__text1840119353311">ECS</span>:</p>

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<p id="EN-US_TOPIC_0021426802__p8297706215640"><strong id="EN-US_TOPIC_0021426802__b43636294195211">sudo apt-get install ntfs-3g chntpw</strong></p>
<p id="EN-US_TOPIC_0021426802__p36390052195223">Method 2:</p>
<p id="EN-US_TOPIC_0021426802__p1448445101313">Download the ntfs-3g and chntpw software packages of the version required by the temporary <span id="EN-US_TOPIC_0021426802__text1974473512204">ECS</span> OS.</p>
<p id="EN-US_TOPIC_0021426802__p16023271195323">To obtain the ntfs-3g software package, log in at <a href="http://www.tuxera.com/community/open-source-ntfs-3g/" target="_blank" rel="noopener noreferrer">www.tuxera.com/community/open-source-ntfs-3g/</a>.</p>
<p id="EN-US_TOPIC_0021426802__p22816579195323">To obtain the chntpw software package, log in at <a href="https://www.chntpw.com/download/" target="_blank" rel="noopener noreferrer">https://www.chntpw.com/download/</a>.</p>
</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0021426802__section1052621215437"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0021426802__ol11891624125717"><li id="EN-US_TOPIC_0021426802__li168911724165711">Stop the original <span id="EN-US_TOPIC_0021426802__text43929361208">ECS</span>, detach the system disk from it, and attach the system disk to the temporary <span id="EN-US_TOPIC_0021426802__text14993123531717">ECS</span>.<ol type="a" id="EN-US_TOPIC_0021426802__ol64363114145227"><li id="EN-US_TOPIC_0021426802__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0021426802__li464234814566">Click <span><img id="EN-US_TOPIC_0021426802__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0021426802__li32846719144331">Under <strong id="EN-US_TOPIC_0021426802__b175218554355"><span id="EN-US_TOPIC_0021426802__text24610550351">Computing</span></strong>, click <strong id="EN-US_TOPIC_0021426802__b652165514354">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0021426802__li16925428202157">Stop the original Windows <span id="EN-US_TOPIC_0021426802__text131511138202011">ECS</span>, switch to the page providing details about the ECS, and click the <strong id="EN-US_TOPIC_0021426802__b551913512188">Disks</strong> tab.<div class="note" id="EN-US_TOPIC_0021426802__note32654683101914"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0021426802__p25456698101914">Do not forcibly stop the Windows <span id="EN-US_TOPIC_0021426802__text15900121411184">ECS</span>. Otherwise, password reset may fail.</p>
<div class="section" id="EN-US_TOPIC_0021426802__section1052621215437"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0021426802__ol11891624125717"><li id="EN-US_TOPIC_0021426802__li168911724165711">Stop the original <span id="EN-US_TOPIC_0021426802__text43929361208">ECS</span>, detach the system disk from it, and attach the system disk to the temporary <span id="EN-US_TOPIC_0021426802__text14993123531717">ECS</span>.<ol type="a" id="EN-US_TOPIC_0021426802__ol64363114145227"><li id="EN-US_TOPIC_0021426802__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0021426802__li464234814566">Click <span><img id="EN-US_TOPIC_0021426802__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0021426802__li32846719144331">Under <strong id="EN-US_TOPIC_0021426802__b14977549104218"><span id="EN-US_TOPIC_0021426802__text89771349164218">Computing</span></strong>, click <strong id="EN-US_TOPIC_0021426802__b17977549124216">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0021426802__li16925428202157">Stop the original Windows <span id="EN-US_TOPIC_0021426802__text131511138202011">ECS</span>, switch to the page providing details about the ECS, and click the <strong id="EN-US_TOPIC_0021426802__b551913512188">Disks</strong> tab.<div class="note" id="EN-US_TOPIC_0021426802__note32654683101914"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0021426802__p25456698101914">Do not forcibly stop the Windows <span id="EN-US_TOPIC_0021426802__text15900121411184">ECS</span>. Otherwise, password reset may fail.</p>
</div></div>
</li><li id="EN-US_TOPIC_0021426802__li49674320202157"><a name="EN-US_TOPIC_0021426802__li49674320202157"></a><a name="li49674320202157"></a>Locate the row containing the system disk to be detached and click <strong id="EN-US_TOPIC_0021426802__b129721858184120">Detach</strong> to detach the system disk from the ECS.</li><li id="EN-US_TOPIC_0021426802__li33733137172114">On the page providing details about the temporary <span id="EN-US_TOPIC_0021426802__text12567392209">ECS</span>, click the <strong id="EN-US_TOPIC_0021426802__b1053414917197">Disks</strong> tab.</li><li id="EN-US_TOPIC_0021426802__li32570973202157"><a name="EN-US_TOPIC_0021426802__li32570973202157"></a><a name="li32570973202157"></a>Click <strong id="EN-US_TOPIC_0021426802__b161532951911">Attach Disk</strong>. In the displayed dialog box, select the system disk detached in step <a href="#EN-US_TOPIC_0021426802__li49674320202157">1.e</a> and attach it to the temporary <span id="EN-US_TOPIC_0021426802__text148561039192012">ECS</span>.</li></ol>
</li><li id="EN-US_TOPIC_0021426802__li7881114019576">Log in to the temporary <span id="EN-US_TOPIC_0021426802__text154242409201">ECS</span> remotely and attach the system disk.<ol type="a" id="EN-US_TOPIC_0021426802__ol774330520859"><li id="EN-US_TOPIC_0021426802__li20334892202157"><a name="EN-US_TOPIC_0021426802__li20334892202157"></a><a name="li20334892202157"></a>Run the following command to view the directory of the system disk detached from the original Windows <span id="EN-US_TOPIC_0021426802__text1893694082013">ECS</span> now attached to the temporary <span id="EN-US_TOPIC_0021426802__text1391538162013">ECS</span>:<p id="EN-US_TOPIC_0021426802__p48796301202157"><strong id="EN-US_TOPIC_0021426802__b48318482201615">fdisk -l</strong></p>
@ -30,7 +28,7 @@ Windows fully (no hibernation or fast restarting), or mount the volume
read-only with the 'ro' mount option.</pre>
<p id="EN-US_TOPIC_0021426802__p1887312119392">Back up the disk data, run the following command to rectify the NTFS file system inconsistency, and attach the system disk:</p>
<p id="EN-US_TOPIC_0021426802__p17152203304912"><strong id="EN-US_TOPIC_0021426802__b1573769891153243">ntfsfix /dev/</strong><em id="EN-US_TOPIC_0021426802__i828149149153243">Result obtained in step <a href="#EN-US_TOPIC_0021426802__li20334892202157">2.a</a></em></p>
<p id="EN-US_TOPIC_0021426802__p1115263314917">For example, if the result obtained in step <a href="#EN-US_TOPIC_0021426802__li20334892202157">2.a</a> is <strong id="EN-US_TOPIC_0021426802__b1267950437">xvde2</strong>, run the following command:</p>
<p id="EN-US_TOPIC_0021426802__p1115263314917">For example, if the result obtained in step <a href="#EN-US_TOPIC_0021426802__li20334892202157">2.a</a> is <strong id="EN-US_TOPIC_0021426802__b838481404">xvde2</strong>, run the following command:</p>
<p id="EN-US_TOPIC_0021426802__p0152173394910"><strong id="EN-US_TOPIC_0021426802__b1715213364915">ntfsfix /dev/xvde2</strong></p>
</li></ol>
</li><li id="EN-US_TOPIC_0021426802__li11815752105716">Change the password and clear the original password.<ol type="a" id="EN-US_TOPIC_0021426802__ol50424782201550"><li id="EN-US_TOPIC_0021426802__li62607680202157">Run the following command to back up the SAM file:<p id="EN-US_TOPIC_0021426802__p26598214202157"><a name="EN-US_TOPIC_0021426802__li62607680202157"></a><a name="li62607680202157"></a><strong id="EN-US_TOPIC_0021426802__b38057335202157">cp /mnt/Windows/System32/config/SAM /mnt/Windows/System32/config/SAM.bak</strong></p>
@ -75,7 +73,7 @@ Write hive files? (y/n) [n] : y
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0031073513.html">Resetting a Login Password</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0031073513.html">Passwords</a></div>
</div>
</div>

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@ -33,7 +33,7 @@
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0031073513.html">Resetting a Login Password</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0031073513.html">Passwords</a></div>
</div>
</div>

View File

@ -6,12 +6,12 @@
<div class="section" id="EN-US_TOPIC_0024911405__section37447471165714"><h4 class="sectiontitle">Notes</h4><ul id="EN-US_TOPIC_0024911405__ul52549321513"><li id="EN-US_TOPIC_0024911405__li22547311515">After the OS is reinstalled, the IP and MAC addresses of the <span id="EN-US_TOPIC_0024911405__text510665714187">ECS</span> remain unchanged.</li><li id="EN-US_TOPIC_0024911405__li714412518167">Reinstalling the OS clears the data in all partitions of the EVS system disk, including the system partition. Therefore, back up data before reinstalling the OS.</li><li id="EN-US_TOPIC_0024911405__li32546316151">Reinstalling the OS does not affect data disks.</li><li id="EN-US_TOPIC_0024911405__li1619118131711">Do not perform any operations on the ECS immediately after its OS is reinstalled. Wait for several minutes until the system successfully injects the password or key. Otherwise, the injection may fail, and the ECS cannot be logged in to.</li><li id="EN-US_TOPIC_0024911405__li1225453201512">After the OS is reinstalled, the password for logging in to the ECS will be reset. To retrieve the password, perform the following operations:<ul id="EN-US_TOPIC_0024911405__ul47135949174127"><li id="EN-US_TOPIC_0024911405__li64411840174127">For a Linux ECS, log in to it using the key and set a new password. For instructions about how to log in to an ECS using a key pair, see <a href="en-us_topic_0017955380.html">Login Using an SSH Key</a>.</li><li id="EN-US_TOPIC_0024911405__li49976570174127">For a Windows ECS, retrieve the password by following the instructions provided in <a href="en-us_topic_0031107266.html">Obtaining the Password for Logging In to a Windows ECS</a>.</li></ul>
</li><li id="EN-US_TOPIC_0024911405__li18581102418264">You can choose to encrypt the system disk of an ECS during OS reinstallation.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0024911405__section4500313111616"><h4 class="sectiontitle">Constraints</h4><ul id="EN-US_TOPIC_0024911405__ul66848156141149"><li id="EN-US_TOPIC_0024911405__li49552913144725">The EVS disk quota must be greater than 0.</li><li id="EN-US_TOPIC_0024911405__li19114641141149">If the target <span id="EN-US_TOPIC_0024911405__text4665833132318">ECS</span> is created using a private image, ensure that the private image is available.</li><li id="EN-US_TOPIC_0024911405__li48826997113436">H2 ECSs do not support OS reinstallation.</li><li id="EN-US_TOPIC_0024911405__li1287917124216">If an ECS OS is to be reinstalled using a full-ECS image, the ECS system disk can be encrypted.</li></ul>
<div class="section" id="EN-US_TOPIC_0024911405__section4500313111616"><h4 class="sectiontitle">Constraints</h4><ul id="EN-US_TOPIC_0024911405__ul66848156141149"><li id="EN-US_TOPIC_0024911405__li49552913144725">The EVS disk quota must be greater than 0.</li><li id="EN-US_TOPIC_0024911405__li19114641141149">If the target <span id="EN-US_TOPIC_0024911405__text4665833132318">ECS</span> is created using a private image, ensure that the private image is available.</li><li id="EN-US_TOPIC_0024911405__li1287917124216">If an ECS OS is to be reinstalled using a full-ECS image, the ECS system disk can be encrypted.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0024911405__section2641260214160"><h4 class="sectiontitle">Prerequisites</h4><ul id="EN-US_TOPIC_0024911405__ul5982276195952"><li id="EN-US_TOPIC_0024911405__li31738699195952">The target <span id="EN-US_TOPIC_0024911405__text158042287207">ECS</span> is stopped.</li><li id="EN-US_TOPIC_0024911405__li4397542520019">The target <span id="EN-US_TOPIC_0024911405__text18074162111">ECS</span> has a system disk attached.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0024911405__section58299059111554"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0024911405__ol22026412143346"><li id="EN-US_TOPIC_0024911405__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0024911405__li464234814566">Click <span><img id="EN-US_TOPIC_0024911405__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0024911405__li20776247143354"><a name="EN-US_TOPIC_0024911405__li20776247143354"></a><a name="li20776247143354"></a>Under <strong id="EN-US_TOPIC_0024911405__b842352706201456"><span id="EN-US_TOPIC_0024911405__text13831172342714">Computing</span></strong>, click <strong id="EN-US_TOPIC_0024911405__b84235270620150">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0024911405__li1085462314256">Locate the row containing the target <span id="EN-US_TOPIC_0024911405__text615091615218">ECS</span>. Click <strong id="EN-US_TOPIC_0024911405__b18151716152119">More</strong> in the <strong id="EN-US_TOPIC_0024911405__b5151111622111">Operation</strong> column and select <strong id="EN-US_TOPIC_0024911405__b5222101584415">Manage Image/Disk</strong> &gt; <strong id="EN-US_TOPIC_0024911405__b1315161615214">Reinstall OS</strong>.<p id="EN-US_TOPIC_0024911405__p3854122302512">Only stopped <span id="EN-US_TOPIC_0024911405__text63993291215">ECS</span>s support OS reinstallation. If the <span id="EN-US_TOPIC_0024911405__text512812372212">ECS</span> is not stopped, stop it before proceeding with reinstallation.</p>
</li><li id="EN-US_TOPIC_0024911405__li8531832155310">(Optional) Select the <strong id="EN-US_TOPIC_0024911405__b67851632192510">Encryption</strong> option to encrypt the system disk during OS reinstallation.<p id="EN-US_TOPIC_0024911405__p767712438280">To enable encryption, click <span class="uicontrol" id="EN-US_TOPIC_0024911405__en-us_topic_0163572589_en-us_topic_0144542112_uicontrol528614138616"><b>Create Xrole</b></span> to assign KMS access permissions to EVS. If you have rights granting permission, assign the KMS access permissions to EVS. If you do not have the permission, contact the user having the security administrator rights to assign the KMS access permissions. For more details, see <a href="en-us_topic_0047272493.html">Can All Users Use the Encryption Feature?</a></p>
<div class="section" id="EN-US_TOPIC_0024911405__section58299059111554"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0024911405__ol22026412143346"><li id="EN-US_TOPIC_0024911405__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0024911405__li464234814566">Click <span><img id="EN-US_TOPIC_0024911405__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0024911405__li20776247143354"><a name="EN-US_TOPIC_0024911405__li20776247143354"></a><a name="li20776247143354"></a>Under <strong id="EN-US_TOPIC_0024911405__b12190175781214"><span id="EN-US_TOPIC_0024911405__text219018570129">Computing</span></strong>, click <strong id="EN-US_TOPIC_0024911405__b1619012572127">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0024911405__li1085462314256">Locate the row containing the target <span id="EN-US_TOPIC_0024911405__text615091615218">ECS</span>. Click <strong id="EN-US_TOPIC_0024911405__b18151716152119">More</strong> in the <strong id="EN-US_TOPIC_0024911405__b5151111622111">Operation</strong> column and select <strong id="EN-US_TOPIC_0024911405__b5222101584415">Manage Image/Disk</strong> &gt; <strong id="EN-US_TOPIC_0024911405__b1315161615214">Reinstall OS</strong>.<p id="EN-US_TOPIC_0024911405__p3854122302512">Only stopped <span id="EN-US_TOPIC_0024911405__text63993291215">ECS</span>s support OS reinstallation. If the <span id="EN-US_TOPIC_0024911405__text512812372212">ECS</span> is not stopped, stop it before proceeding with reinstallation.</p>
</li><li id="EN-US_TOPIC_0024911405__li8531832155310">(Optional) Select the <strong id="EN-US_TOPIC_0024911405__b67851632192510">Encryption</strong> option to encrypt the system disk during OS reinstallation.<p id="EN-US_TOPIC_0024911405__p767712438280">To enable encryption, click <span class="uicontrol" id="EN-US_TOPIC_0024911405__en-us_topic_0163572589_en-us_topic_0144542112_uicontrol528614138616"><b>Create Xrole</b></span> to assign KMS access permissions to EVS. If you have rights granting permission, assign the KMS access permissions to EVS. If you do not have the permission, contact the user having the security administrator rights to assign the KMS access permissions. For more details, see <a href="en-us_topic_0047272493.html">Can All Users Use the Encryption Feature?</a> </p>
<p id="EN-US_TOPIC_0024911405__en-us_topic_0144542112_p228631310615">Encryption parameters are as follows:</p>
<ul id="EN-US_TOPIC_0024911405__en-us_topic_0144542112_ul202865131169"><li id="EN-US_TOPIC_0024911405__en-us_topic_0163572589_en-us_topic_0144542112_li14286813962"><strong id="EN-US_TOPIC_0024911405__en-us_topic_0163572589_en-us_topic_0013859510_b84235270618740">Encryption</strong>: indicates that the EVS disk has been encrypted.</li><li id="EN-US_TOPIC_0024911405__en-us_topic_0163572589_en-us_topic_0144542112_li182868131664"><strong id="EN-US_TOPIC_0024911405__en-us_topic_0163572589_en-us_topic_0013859510_b8423527061882">Create Xrole</strong>: assigns KMS access permissions to EVS to obtain KMS keys. After the permissions are assigned, follow-up operations do not require assigning permissions again.</li><li id="EN-US_TOPIC_0024911405__en-us_topic_0163572589_en-us_topic_0144542112_li152868131619"><strong id="EN-US_TOPIC_0024911405__en-us_topic_0163572589_b959511561916">KMS Key Name</strong>: specifies the name of the key used by the encrypted EVS disk. You can select an existing key, or click <strong id="EN-US_TOPIC_0024911405__en-us_topic_0163572589_b2406645144311">Create KMS Key</strong> and create a new one on the KMS console. The default value is <strong id="EN-US_TOPIC_0024911405__en-us_topic_0163572589_b626615844413">evs/default</strong>.</li><li id="EN-US_TOPIC_0024911405__en-us_topic_0163572589_en-us_topic_0144542112_li5286191313611"><strong id="EN-US_TOPIC_0024911405__en-us_topic_0163572589_en-us_topic_0013859510_b84235270615143">Xrole Name: EVSAccessKMS</strong>: specifies that permissions have been assigned to EVS to obtain KMS keys for encrypting or decrypting EVS disks.</li><li id="EN-US_TOPIC_0024911405__en-us_topic_0163572589_en-us_topic_0144542112_li528671319610"><strong id="EN-US_TOPIC_0024911405__en-us_topic_0163572589_en-us_topic_0013859510_b842352706155046">KMS Key ID</strong>: specifies the ID of the key used by the encrypted data disk.</li></ul>
</li><li id="EN-US_TOPIC_0024911405__li23576357205117">(Optional) Select a <strong id="EN-US_TOPIC_0024911405__b84235270615319">License Type</strong> (<strong id="EN-US_TOPIC_0024911405__b842352706153129">Use license from the system</strong> or <strong id="EN-US_TOPIC_0024911405__b842352706153134">Bring your own license (BYOL)</strong>) if the reinstalled OS running on your ECS is billed. For more details, see <a href="en-us_topic_0046566932.html">License Type</a>.<p id="EN-US_TOPIC_0024911405__p46529483205117">The following OSs are billed:</p>

View File

@ -1,14 +1,14 @@
<a name="EN-US_TOPIC_0027157850"></a><a name="EN-US_TOPIC_0027157850"></a>
<h1 class="topictitle1">Enabling Internet Connectivity for an <span id="text123765419131">ECS</span> Without an EIP</h1>
<div id="body1457574115625"><div class="section" id="EN-US_TOPIC_0027157850__section6427533194453"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0027157850__p6524555495935">To ensure platform security and conserve EIPs, EIPs are assigned only to specified <span id="EN-US_TOPIC_0027157850__text1545011314395">ECS</span>s. <span id="EN-US_TOPIC_0027157850__text11886342077">ECS</span>s without EIPs cannot access the Internet directly. If these <span id="EN-US_TOPIC_0027157850__text635593312396">ECS</span>s need to access the Internet (for example, to perform a software upgrade or install a patch), you can select an <span id="EN-US_TOPIC_0027157850__text122101734153911">ECS</span> with an EIP bound to function as a proxy <span id="EN-US_TOPIC_0027157850__text03771635103917">ECS</span>, providing an access channel for these <span id="EN-US_TOPIC_0027157850__text549463041120">ECS</span>.</p>
<div id="body1457574115625"><div class="section" id="EN-US_TOPIC_0027157850__section6427533194453"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0027157850__p6524555495935">To ensure platform security and conserve EIPs, EIPs are assigned only to specified <span id="EN-US_TOPIC_0027157850__text1545011314395">ECS</span>s. <span id="EN-US_TOPIC_0027157850__text11886342077">ECS</span>s without EIPs cannot access the Internet directly. If these ECSs need to access the Internet (for example, to perform a software upgrade or install a patch), you can select an ECS with an EIP bound to function as a proxy ECS, providing an access channel for these ECSs.</p>
<div class="note" id="EN-US_TOPIC_0027157850__note133331220133410"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0027157850__p19333520143410">NAT Gateway is recommended, which provides both the SNAT and DNAT functions for your <span id="EN-US_TOPIC_0027157850__text19249736143915">ECS</span>s in a VPC and allows the <span id="EN-US_TOPIC_0027157850__text11698155411811">ECS</span>s to access or provide services accessible from the Internet. </p>
</div></div>
</div>
<div class="section" id="EN-US_TOPIC_0027157850__section2608915610029"><h4 class="sectiontitle">Prerequisites</h4><ul id="EN-US_TOPIC_0027157850__ul57147806103027"><li id="EN-US_TOPIC_0027157850__li5394806103027">A proxy <span id="EN-US_TOPIC_0027157850__text15137193753916">ECS</span> with an EIP bound is available.</li><li id="EN-US_TOPIC_0027157850__li43600437114252">The IP address of the proxy <span id="EN-US_TOPIC_0027157850__text1698539203918">ECS</span> is in the same network and same security group as the <span id="EN-US_TOPIC_0027157850__text3883204613918">ECS</span>s that need to access the Internet.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0027157850__section6907807103042"><h4 class="sectiontitle">Linux Proxy <span id="EN-US_TOPIC_0027157850__text11280191042018">ECS</span></h4><p id="EN-US_TOPIC_0027157850__p96322674819">In this example, the proxy <span id="EN-US_TOPIC_0027157850__text120563515207">ECS</span> runs CentOS 6.5.</p>
<ol id="EN-US_TOPIC_0027157850__ol33320884113959"><li id="EN-US_TOPIC_0027157850__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0027157850__li464234814566">Click <span><img id="EN-US_TOPIC_0027157850__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0027157850__li46924084113959">Under <strong id="EN-US_TOPIC_0027157850__b1930438019"><span id="EN-US_TOPIC_0027157850__text1911418865">Computing</span></strong>, click <strong id="EN-US_TOPIC_0027157850__b809235628">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0027157850__li42754441113959">In the search box above the upper right corner of the <span id="EN-US_TOPIC_0027157850__text6178154220399">ECS</span> list, enter the proxy <span id="EN-US_TOPIC_0027157850__text6468125715118">ECS</span> name for search.</li><li id="EN-US_TOPIC_0027157850__li49245655113959">Click the name of the proxy <span id="EN-US_TOPIC_0027157850__text10882134212391">ECS</span>. The page providing details about the <span id="EN-US_TOPIC_0027157850__text1799143012106">ECS</span> is displayed.</li><li id="EN-US_TOPIC_0027157850__li38671581113959">Click the <strong id="EN-US_TOPIC_0027157850__b84235270618429">Network Interfaces</strong> tab and then <span><img id="EN-US_TOPIC_0027157850__image16740174871" src="en-us_image_0128851717.png"></span>. Then, disable <strong id="EN-US_TOPIC_0027157850__b84235270618529">Source/Destination Check</strong>.<p id="EN-US_TOPIC_0027157850__p1846151153411">By default, the source/destination check function is enabled. When this function is enabled, the system checks whether source IP addresses contained in the packets sent by <span id="EN-US_TOPIC_0027157850__text159541444113919">ECS</span>s are correct. If the IP addresses are incorrect, the system does not allow the <span id="EN-US_TOPIC_0027157850__text16431453151110">ECS</span>s to send the packets. This mechanism prevents packet spoofing, thereby improving system security. However, this mechanism prevents the packet sender from receiving returned packets. Therefore, disable the source/destination check.</p>
<ol id="EN-US_TOPIC_0027157850__ol33320884113959"><li id="EN-US_TOPIC_0027157850__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0027157850__li464234814566">Click <span><img id="EN-US_TOPIC_0027157850__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0027157850__li46924084113959">Under <strong id="EN-US_TOPIC_0027157850__b2067314412401"><span id="EN-US_TOPIC_0027157850__text186731346406">Computing</span></strong>, click <strong id="EN-US_TOPIC_0027157850__b167419410405">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0027157850__li42754441113959">In the search box above the upper right corner of the <span id="EN-US_TOPIC_0027157850__text6178154220399">ECS</span> list, enter the proxy <span id="EN-US_TOPIC_0027157850__text6468125715118">ECS</span> name for search.</li><li id="EN-US_TOPIC_0027157850__li49245655113959">Click the name of the proxy <span id="EN-US_TOPIC_0027157850__text10882134212391">ECS</span>. The page providing details about the <span id="EN-US_TOPIC_0027157850__text1799143012106">ECS</span> is displayed.</li><li id="EN-US_TOPIC_0027157850__li38671581113959">Click the <strong id="EN-US_TOPIC_0027157850__b84235270618429">Network Interfaces</strong> tab and then <span><img id="EN-US_TOPIC_0027157850__image16740174871" src="en-us_image_0128851717.png"></span>. Then, disable <strong id="EN-US_TOPIC_0027157850__b84235270618529">Source/Destination Check</strong>.<p id="EN-US_TOPIC_0027157850__p1846151153411">By default, the source/destination check function is enabled. When this function is enabled, the system checks whether source IP addresses contained in the packets sent by <span id="EN-US_TOPIC_0027157850__text159541444113919">ECS</span>s are correct. If the IP addresses are incorrect, the system does not allow the <span id="EN-US_TOPIC_0027157850__text16431453151110">ECS</span>s to send the packets. This mechanism prevents packet spoofing, thereby improving system security. However, this mechanism prevents the packet sender from receiving returned packets. Therefore, disable the source/destination check.</p>
</li><li id="EN-US_TOPIC_0027157850__li5860308113959">Log in to the proxy <span id="EN-US_TOPIC_0027157850__text7842746163912">ECS</span>.<p id="EN-US_TOPIC_0027157850__p45390388113959">For more details, see <a href="en-us_topic_0013771089.html">Login Overview</a>.</p>
</li><li id="EN-US_TOPIC_0027157850__li32041953113959">Run the following command to check whether the proxy <span id="EN-US_TOPIC_0027157850__text525035053916">ECS</span> can access the Internet:<p id="EN-US_TOPIC_0027157850__p4922924113959"><strong id="EN-US_TOPIC_0027157850__b52742774113959">ping www.google.com</strong></p>
<p id="EN-US_TOPIC_0027157850__p44306317113959">The proxy <span id="EN-US_TOPIC_0027157850__text12634115123917">ECS</span> can access the Internet if information similar to the following is displayed:</p>
@ -18,11 +18,11 @@
</li><li id="EN-US_TOPIC_0027157850__li1543981113959">Run the following command to check whether IP forwarding is enabled on the proxy <span id="EN-US_TOPIC_0027157850__text168503538394">ECS</span>:<p id="EN-US_TOPIC_0027157850__p45261401113959"><strong id="EN-US_TOPIC_0027157850__b19942125113959">cat /proc/sys/net/ipv4/ip_forward</strong></p>
<ul id="EN-US_TOPIC_0027157850__ul29997715113959"><li id="EN-US_TOPIC_0027157850__li42294878113959">If <strong id="EN-US_TOPIC_0027157850__b842352706182537">0</strong> (disabled) is displayed, go to <a href="#EN-US_TOPIC_0027157850__li51820417113959">10</a>.</li><li id="EN-US_TOPIC_0027157850__li3333079113959">If <strong id="EN-US_TOPIC_0027157850__b842352706182611">1</strong> (enabled), go to <a href="#EN-US_TOPIC_0027157850__li49419571113959">16</a>.</li></ul>
</li><li id="EN-US_TOPIC_0027157850__li51820417113959"><a name="EN-US_TOPIC_0027157850__li51820417113959"></a><a name="li51820417113959"></a>Run the following command to open the IP forwarding configuration file in the vi editor:<p id="EN-US_TOPIC_0027157850__p57953607113959"><a name="EN-US_TOPIC_0027157850__li51820417113959"></a><a name="li51820417113959"></a><strong id="EN-US_TOPIC_0027157850__b13895830113959">vi /etc/sysctl.conf</strong></p>
</li><li id="EN-US_TOPIC_0027157850__li63730573113959">Press <strong>i</strong> to enter editing mode.</li><li id="EN-US_TOPIC_0027157850__li61902825113959">Set the <strong id="EN-US_TOPIC_0027157850__b84235270618748">net.ipv4.ip_forward</strong> value to <strong id="EN-US_TOPIC_0027157850__b84235270618753">1</strong>.<p id="EN-US_TOPIC_0027157850__p36704253113959">Set the <strong id="EN-US_TOPIC_0027157850__b84235270618280">net.ipv4.ip_forward</strong> value to <strong id="EN-US_TOPIC_0027157850__b84235270618288">1</strong>.</p>
</li><li id="EN-US_TOPIC_0027157850__li63730573113959">Press <strong id="EN-US_TOPIC_0027157850__b4743173411917">i</strong> to enter editing mode.</li><li id="EN-US_TOPIC_0027157850__li61902825113959">Set the <strong id="EN-US_TOPIC_0027157850__b84235270618748">net.ipv4.ip_forward</strong> value to <strong id="EN-US_TOPIC_0027157850__b84235270618753">1</strong>.<p id="EN-US_TOPIC_0027157850__p36704253113959">Set the <strong id="EN-US_TOPIC_0027157850__b84235270618280">net.ipv4.ip_forward</strong> value to <strong id="EN-US_TOPIC_0027157850__b84235270618288">1</strong>.</p>
<div class="note" id="EN-US_TOPIC_0027157850__note1343611566227"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0027157850__p64362056162212">If the <strong id="EN-US_TOPIC_0027157850__b84235270615710">sysctl.conf</strong> file does not contain the <strong id="EN-US_TOPIC_0027157850__b84235270615720">net.ipv4.ip_forward</strong> parameter, run the following command to add it:</p>
<p id="EN-US_TOPIC_0027157850__p107321635152314"><strong id="EN-US_TOPIC_0027157850__b1918516579232">echo net.ipv4.ip_forward=1 &gt;&gt; /etc/sysctl.conf</strong></p>
</div></div>
</li><li id="EN-US_TOPIC_0027157850__li30002886113959">Press <strong>Esc</strong>, type <strong id="EN-US_TOPIC_0027157850__en-us_topic_0023092408_b123758096717552">:wq</strong>, and press <strong>Enter</strong>.<p id="EN-US_TOPIC_0027157850__p48072896113959">The system saves the configurations and exits the vi editor.</p>
</li><li id="EN-US_TOPIC_0027157850__li30002886113959">Press <strong id="EN-US_TOPIC_0027157850__b147468341496">Esc</strong>, type <strong id="EN-US_TOPIC_0027157850__en-us_topic_0023092408_b123758096717552">:wq</strong>, and press <strong id="EN-US_TOPIC_0027157850__b1874653412912">Enter</strong>.<p id="EN-US_TOPIC_0027157850__p48072896113959">The system saves the configurations and exits the vi editor.</p>
</li><li id="EN-US_TOPIC_0027157850__li61723653113959">Run the following command to make the modification take effect:<p id="EN-US_TOPIC_0027157850__p14314724113959"><a name="EN-US_TOPIC_0027157850__li61723653113959"></a><a name="li61723653113959"></a><strong id="EN-US_TOPIC_0027157850__b1590524113959">sysctl -p /etc/sysctl.conf</strong></p>
</li><li id="EN-US_TOPIC_0027157850__li33604568113959">Run the following commands to configure default <strong id="EN-US_TOPIC_0027157850__b15498822203118">iptables</strong> rules:<p id="EN-US_TOPIC_0027157850__p1823117619111"><strong id="EN-US_TOPIC_0027157850__b127896214110">iptables -P INPUT ACCEPT</strong></p>
<p id="EN-US_TOPIC_0027157850__p6610987119"><strong id="EN-US_TOPIC_0027157850__b167131011419">iptables -P OUTPUT ACCEPT</strong></p>
@ -32,14 +32,14 @@
</li><li id="EN-US_TOPIC_0027157850__li49419571113959"><a name="EN-US_TOPIC_0027157850__li49419571113959"></a><a name="li49419571113959"></a>Run the following command to configure source network address translation (SNAT) to enable <span id="EN-US_TOPIC_0027157850__text2053045423910">ECS</span>s in the same network segment to access the Internet through the proxy <span id="EN-US_TOPIC_0027157850__text91921352191313">ECS</span>:<p id="EN-US_TOPIC_0027157850__p54843236113959"><strong id="EN-US_TOPIC_0027157850__b15551319111713">iptables -t nat -A POSTROUTING -o eth0 -s</strong> <em id="EN-US_TOPIC_0027157850__i2995066113959">subnet/netmask-bits</em> <strong id="EN-US_TOPIC_0027157850__b16811994122">-j SNAT --to</strong> <em id="EN-US_TOPIC_0027157850__i35919854113959">nat-instance-ip</em></p>
<p id="EN-US_TOPIC_0027157850__p23827079113959">For example, if the proxy <span id="EN-US_TOPIC_0027157850__text658665612395">ECS</span> is in network 192.168.125.0, the subnet mask has 24 bits, and the private IP address is 192.168.125.4, run the following command:</p>
<p id="EN-US_TOPIC_0027157850__p27860684113959"><strong id="EN-US_TOPIC_0027157850__b1855517361179">iptables -t nat -A POSTROUTING -o eth0 -s</strong> <em id="EN-US_TOPIC_0027157850__i55853760113959">192.168.125.0/24</em> <strong id="EN-US_TOPIC_0027157850__b077717554176">-j SNAT --to 192.168.125.4</strong></p>
<div class="note" id="EN-US_TOPIC_0027157850__note534810584596"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0027157850__p1834865845912">To retain the preceding configuration even after the ECS is restarted, run the <strong id="EN-US_TOPIC_0027157850__b65178291107">vi /etc/rc.local</strong> command to edit the <strong id="EN-US_TOPIC_0027157850__b193651827806">rc.local</strong> file. Specifically, copy the rule described in step <a href="#EN-US_TOPIC_0027157850__li49419571113959">16</a> into <strong id="EN-US_TOPIC_0027157850__b51046198115">rc.local</strong>, press <strong id="EN-US_TOPIC_0027157850__b11309226327">Esc</strong> to exit the editing mode, and enter <strong id="EN-US_TOPIC_0027157850__b519133013213">:wq</strong> to save and exit the file.</p>
<div class="note" id="EN-US_TOPIC_0027157850__note534810584596"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0027157850__p1834865845912">To retain the preceding configuration even after the ECS is restarted, run the <strong id="EN-US_TOPIC_0027157850__b65178291107">vi /etc/rc.local</strong> command to edit the <strong id="EN-US_TOPIC_0027157850__b193651827806">rc.local</strong> file. Specifically, copy the rule described in step <a href="#EN-US_TOPIC_0027157850__li49419571113959">16</a> into <strong id="EN-US_TOPIC_0027157850__b51046198115">rc.local</strong>, press <strong id="EN-US_TOPIC_0027157850__b11309226327">Esc</strong> to exit Insert mode, and enter <strong id="EN-US_TOPIC_0027157850__b519133013213">:wq</strong> to save the settings and exit.</p>
</div></div>
</li><li id="EN-US_TOPIC_0027157850__li6277114516107">Run the following commands to save the iptables configuration and make it start up automatically upon ECS startup:<p id="EN-US_TOPIC_0027157850__p13140758161010"><a name="EN-US_TOPIC_0027157850__li6277114516107"></a><a name="li6277114516107"></a><strong id="EN-US_TOPIC_0027157850__b15331059111014">service iptables save</strong></p>
<p id="EN-US_TOPIC_0027157850__p146661755112"><strong id="EN-US_TOPIC_0027157850__b516115413411">chkconfig iptables on</strong></p>
</li><li id="EN-US_TOPIC_0027157850__li47056383113959">Run the following command to check whether SNAT has been configured:<p id="EN-US_TOPIC_0027157850__p43562301113959"><a name="EN-US_TOPIC_0027157850__li47056383113959"></a><a name="li47056383113959"></a><strong id="EN-US_TOPIC_0027157850__b42122957113959">iptables -t nat --list</strong></p>
<p id="EN-US_TOPIC_0027157850__p38885512113959">SNAT has been configured if information similar to <a href="#EN-US_TOPIC_0027157850__fig27598108113959">Figure 1</a> is displayed.</p>
<div class="fignone" id="EN-US_TOPIC_0027157850__fig27598108113959"><a name="EN-US_TOPIC_0027157850__fig27598108113959"></a><a name="fig27598108113959"></a><span class="figcap"><b>Figure 1 </b>Successful SNAT configuration</span><br><span><img id="EN-US_TOPIC_0027157850__image62718780113959" src="en-us_image_0027174005.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0027157850__li66936514113959">Add a route.<ol type="a" id="EN-US_TOPIC_0027157850__ol52176633113959"><li id="EN-US_TOPIC_0027157850__li648610515510">Log in to the management console.</li><li id="EN-US_TOPIC_0027157850__li7951089219">Click <span><img id="EN-US_TOPIC_0027157850__en-us_topic_0014250631_image1862675853202121_1" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0027157850__li53470716113959">Under <strong id="EN-US_TOPIC_0027157850__b473631270"><span id="EN-US_TOPIC_0027157850__text159160124215">Network</span></strong>, click <strong id="EN-US_TOPIC_0027157850__b1224488898">Virtual Private Cloud</strong>.</li><li id="EN-US_TOPIC_0027157850__li11474399113959">Select a VPC to which a route is to be added and click <strong id="EN-US_TOPIC_0027157850__b842352706173124">Route Tables</strong>. On the <strong id="EN-US_TOPIC_0027157850__b782752106173138">Route Tables</strong> page, click <strong id="EN-US_TOPIC_0027157850__b73147752173149">Add Route</strong>.</li><li id="EN-US_TOPIC_0027157850__li20710484113959">Set route information on the displayed page.<ul id="EN-US_TOPIC_0027157850__ul54496948113959"><li id="EN-US_TOPIC_0027157850__li36160729113959"><strong id="EN-US_TOPIC_0027157850__b1960397686">Destination</strong>: indicates the destination network segment. The default value is <strong id="EN-US_TOPIC_0027157850__b1142897281">0.0.0.0/0</strong>.</li><li id="EN-US_TOPIC_0027157850__li43337918113959"><strong id="EN-US_TOPIC_0027157850__b1955257345">Next Hop</strong>: indicates the private IP address of the SNAT <span id="EN-US_TOPIC_0027157850__text213978391">ECS</span>.<p id="EN-US_TOPIC_0027157850__p57011107113959">You can obtain the private IP address of the <span id="EN-US_TOPIC_0027157850__text48821157123917">ECS</span> on the <strong id="EN-US_TOPIC_0027157850__b11550213161515">Elastic Cloud Server</strong> page.</p>
</li><li id="EN-US_TOPIC_0027157850__li66936514113959">Add a route.<ol type="a" id="EN-US_TOPIC_0027157850__ol52176633113959"><li id="EN-US_TOPIC_0027157850__li648610515510">Log in to the management console.</li><li id="EN-US_TOPIC_0027157850__li7951089219">Click <span><img id="EN-US_TOPIC_0027157850__en-us_topic_0014250631_image1862675853202121_1" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0027157850__li53470716113959">Under <strong id="EN-US_TOPIC_0027157850__b782678548"><span id="EN-US_TOPIC_0027157850__text159160124215">Network</span></strong>, click <strong id="EN-US_TOPIC_0027157850__b1145158893">Virtual Private Cloud</strong>.</li><li id="EN-US_TOPIC_0027157850__li11474399113959">Choose <strong id="EN-US_TOPIC_0027157850__b18105111173">Route Tables</strong> in the left navigation pane. On the displayed page, click a VPC which a route is to be added to. On the displayed page, click <strong id="EN-US_TOPIC_0027157850__b73147752173149">Add Route</strong>.</li><li id="EN-US_TOPIC_0027157850__li20710484113959">Set route information on the displayed page.<ul id="EN-US_TOPIC_0027157850__ul54496948113959"><li id="EN-US_TOPIC_0027157850__li36160729113959"><strong id="EN-US_TOPIC_0027157850__b1055789097">Destination</strong>: indicates the destination network segment. The default value is <strong id="EN-US_TOPIC_0027157850__b1527561505">0.0.0.0/0</strong>.</li><li id="EN-US_TOPIC_0027157850__li43337918113959"><strong id="EN-US_TOPIC_0027157850__b1109805267">Next Hop</strong>: indicates the private IP address of the SNAT <span id="EN-US_TOPIC_0027157850__text1979372535">ECS</span>.<p id="EN-US_TOPIC_0027157850__p57011107113959">You can obtain the private IP address of the <span id="EN-US_TOPIC_0027157850__text48821157123917">ECS</span> on the <strong id="EN-US_TOPIC_0027157850__b11550213161515">Elastic Cloud Server</strong> page.</p>
</li></ul>
</li></ol>
</li><li id="EN-US_TOPIC_0027157850__li8776155274817">To delete the added iptables rules, run the following command:<p id="EN-US_TOPIC_0027157850__p237194319550"><a name="EN-US_TOPIC_0027157850__li8776155274817"></a><a name="li8776155274817"></a><strong id="EN-US_TOPIC_0027157850__b113917801813">iptables -t nat -D POSTROUTING -o eth0 -s</strong> <em id="EN-US_TOPIC_0027157850__i8372144335512">subnet/netmask-bits</em> <strong id="EN-US_TOPIC_0027157850__b1460282592619">-j SNAT --to</strong> <em id="EN-US_TOPIC_0027157850__i5374194312551">nat-instance-ip</em></p>

View File

@ -188,9 +188,9 @@
</div>
<div class="section" id="EN-US_TOPIC_0027268511__section5982347111459"><a name="EN-US_TOPIC_0027268511__section5982347111459"></a><a name="section5982347111459"></a><h4 class="sectiontitle">Log In to a Windows ECS Using a Non-English Keyboard</h4><ol id="EN-US_TOPIC_0027268511__ol14808116111459"><li id="EN-US_TOPIC_0027268511__li66164181111459">Log in to the management console.</li><li id="EN-US_TOPIC_0027268511__li046177101213">Click <span><img id="EN-US_TOPIC_0027268511__en-us_topic_0014250631_image1862675853202121_1" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0027268511__li17452565111640">Under <strong id="EN-US_TOPIC_0027268511__b10427447115915">Computing</strong>, click <strong id="EN-US_TOPIC_0027268511__b12427247205916">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0027268511__li52373941115359">Obtain the password for logging in to the ECS.<p id="EN-US_TOPIC_0027268511__p5038532111540"><a name="EN-US_TOPIC_0027268511__li52373941115359"></a><a name="li52373941115359"></a>Before logging in to the ECS, you must have the login password.</p>
<p id="EN-US_TOPIC_0027268511__p89681118152820">For instructions about how to obtain the password for logging in to a Windows ECS, see <a href="en-us_topic_0031107266.html">Obtaining the Password for Logging In to a Windows ECS</a>.</p>
</li><li id="EN-US_TOPIC_0027268511__li49523598111459">In the search box above the upper right corner of the ECS list, enter the ECS name, IP address, or ID, and click <span><img id="EN-US_TOPIC_0027268511__image1130062801103443" src="en-us_image_0030874275.png"></span> for search.</li><li id="EN-US_TOPIC_0027268511__li50214528111459">Locate the row containing the ECS and click <strong id="EN-US_TOPIC_0027268511__b1735697937">Remote Login</strong> in the <strong id="EN-US_TOPIC_0027268511__b189497035">Operation</strong> column.</li><li id="EN-US_TOPIC_0027268511__li49277573111459">In the displayed <strong id="EN-US_TOPIC_0027268511__b56972969520052">Configure Keyboard Layout for Remote Login</strong> dialog box, select the keyboard that suits your language.<ul id="EN-US_TOPIC_0027268511__ul40844978111459"><li id="EN-US_TOPIC_0027268511__li32060489111459">When logging in to the ECS using VNC for the first time, select the default English keyboard. The ECS OS uses the English keyboard by default.</li><li id="EN-US_TOPIC_0027268511__li20108945111459">If you have changed the keyboard language of the ECS OS, select the keyboard language to which you have changed.</li></ul>
</li><li id="EN-US_TOPIC_0027268511__li49523598111459">In the search box above the upper right corner of the ECS list, enter the ECS name, IP address, or ID, and click <span><img id="EN-US_TOPIC_0027268511__image1130062801103443" src="en-us_image_0030874275.png"></span> for search.</li><li id="EN-US_TOPIC_0027268511__li50214528111459">Locate the row containing the ECS and click <strong id="EN-US_TOPIC_0027268511__b2115867667">Remote Login</strong> in the <strong id="EN-US_TOPIC_0027268511__b1932579859">Operation</strong> column.</li><li id="EN-US_TOPIC_0027268511__li49277573111459">In the displayed <strong id="EN-US_TOPIC_0027268511__b56972969520052">Configure Keyboard Layout for Remote Login</strong> dialog box, select the keyboard that suits your language.<ul id="EN-US_TOPIC_0027268511__ul40844978111459"><li id="EN-US_TOPIC_0027268511__li32060489111459">When logging in to the ECS using VNC for the first time, select the default English keyboard. The ECS OS uses the English keyboard by default.</li><li id="EN-US_TOPIC_0027268511__li20108945111459">If you have changed the keyboard language of the ECS OS, select the keyboard language to which you have changed.</li></ul>
<div class="fignone" id="EN-US_TOPIC_0027268511__fig46762780111459"><span class="figcap"><b>Figure 5 </b>Keyboard layout configuration</span><br><span><img id="EN-US_TOPIC_0027268511__en-us_topic_0027268511_image198214318316" src="en-us_image_0030874270.png" title="Click to enlarge" class="imgResize"></span></div>
</li></ol><ol start="8" id="EN-US_TOPIC_0027268511__ol65873268111459"><li id="EN-US_TOPIC_0027268511__li55988502111459">Click <strong id="EN-US_TOPIC_0027268511__b919217606">Remote Login</strong>.</li><li id="EN-US_TOPIC_0027268511__li34134472111459">(Optional) If you have changed the system language, in the dialog box that is displayed, click <strong id="EN-US_TOPIC_0027268511__en-us_topic_0027268511_b2144786640211514">Remote Login</strong>.<div class="fignone" id="EN-US_TOPIC_0027268511__en-us_topic_0027268511_fig54376817111459"><span class="figcap"><b>Figure 6 </b>Remote Login</span><br><span><img id="EN-US_TOPIC_0027268511__en-us_topic_0027268511_image42446047111459" src="en-us_image_0030874271.png" title="Click to enlarge" class="imgResize"></span></div>
</li></ol><ol start="8" id="EN-US_TOPIC_0027268511__ol65873268111459"><li id="EN-US_TOPIC_0027268511__li55988502111459">Click <strong id="EN-US_TOPIC_0027268511__b457488501">Remote Login</strong>.</li><li id="EN-US_TOPIC_0027268511__li34134472111459">(Optional) If you have changed the system language, in the dialog box that is displayed, click <strong id="EN-US_TOPIC_0027268511__en-us_topic_0027268511_b2144786640211514">Remote Login</strong>.<div class="fignone" id="EN-US_TOPIC_0027268511__en-us_topic_0027268511_fig54376817111459"><span class="figcap"><b>Figure 6 </b>Remote Login</span><br><span><img id="EN-US_TOPIC_0027268511__en-us_topic_0027268511_image42446047111459" src="en-us_image_0030874271.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0027268511__li56190747193213">(Optional) When the system displays "Press CTRL+ALT+DELETE to log on", click <strong id="EN-US_TOPIC_0027268511__en-us_topic_0027290684_b842352706201616_1">Send CtrlAltDel</strong> in the upper part of the remote login page to log in to the ECS.<div class="fignone" id="EN-US_TOPIC_0027268511__en-us_topic_0027290684_fig22996848191913_1"><span class="figcap"><b>Figure 7 </b>Send CtrlAltDel</span><br><span><img id="EN-US_TOPIC_0027268511__en-us_topic_0027290684_image50805371191913_1" src="en-us_image_0042322120.png"></span></div>
</li><li id="EN-US_TOPIC_0027268511__li64981560195132">(Optional) If you need your cursor to be displayed on the remote login page, click <strong id="EN-US_TOPIC_0027268511__en-us_topic_0027268511_b16217152025520">Local Cursor</strong>.<div class="fignone" id="EN-US_TOPIC_0027268511__en-us_topic_0027268511_fig3022163194924"><span class="figcap"><b>Figure 8 </b>Local Cursor</span><br><span><img id="EN-US_TOPIC_0027268511__en-us_topic_0027268511_en-us_topic_0036067988_image5640621116424" src="en-us_image_0036068239.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0027268511__li58839855111459">Enter the ECS password as prompted.<ul id="EN-US_TOPIC_0027268511__ul59796655111459"><li id="EN-US_TOPIC_0027268511__li1298990111459">When logging in to the ECS using VNC for the first time, use the English keyboard to enter the password. After you have logged in to the ECS, see <a href="#EN-US_TOPIC_0027268511__section66962382111459">Changing the OS Keyboard Language</a> to change the keyboard language of the ECS OS. You can then select the keyboard language and enter the password the next time you log in.</li><li id="EN-US_TOPIC_0027268511__li38109398111459">If you have changed the keyboard language of the ECS OS, ensure that the keyboard language in use, the keyboard language selected in step <a href="#EN-US_TOPIC_0027268511__li17715715111459">7</a>, and the changed OS keyboard language are all the same.</li></ul>

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<a name="EN-US_TOPIC_0027371529"></a><a name="EN-US_TOPIC_0027371529"></a>
<h1 class="topictitle1">Monitoring <span id="text1861139112010">ECS</span>s</h1>
<div id="body1457936833743"><p id="EN-US_TOPIC_0027371529__p63724626201225">Monitoring is key for ensuring <span id="EN-US_TOPIC_0027371529__text10546105914418">ECS</span> performance, reliability, and availability. Using monitored data, you can determine <span id="EN-US_TOPIC_0027371529__text12637154012186">ECS</span> resource utilization. The public cloud provides Cloud Eye to help you obtain the running statuses of your <span id="EN-US_TOPIC_0027371529__text39081064216">ECS</span>s. You can use Cloud Eye to automatically monitor <span id="EN-US_TOPIC_0027371529__text1249019110424">ECS</span>s in real time and manage alarms and notifications to keep track of <span id="EN-US_TOPIC_0027371529__text1314133651914">ECS</span> performance metrics.</p>
<div id="body1457936833743"><p id="EN-US_TOPIC_0027371529__p63724626201225">Monitoring is key for ensuring <span id="EN-US_TOPIC_0027371529__text10546105914418">ECS</span> performance, reliability, and availability. Using monitored data, you can determine <span id="EN-US_TOPIC_0027371529__text12637154012186">ECS</span> resource utilization. The cloud service platform provides Cloud Eye to help you obtain the running statuses of your <span id="EN-US_TOPIC_0027371529__text39081064216">ECS</span>s. You can use Cloud Eye to automatically monitor <span id="EN-US_TOPIC_0027371529__text1249019110424">ECS</span>s in real time and manage alarms and notifications to keep track of <span id="EN-US_TOPIC_0027371529__text1314133651914">ECS</span> performance metrics.</p>
<p id="EN-US_TOPIC_0027371529__p26987325222523">This section covers the following content:</p>
<ul id="EN-US_TOPIC_0027371529__ul36154885222527"><li id="EN-US_TOPIC_0027371529__li3416595223128">Viewing basic <span id="EN-US_TOPIC_0027371529__text13841142104219">ECS</span> metrics</li><li id="EN-US_TOPIC_0027371529__li59315067222540">Customizing <span id="EN-US_TOPIC_0027371529__text4506454215">ECS</span> alarm rules</li><li id="EN-US_TOPIC_0027371529__li55633920222617">Viewing <span id="EN-US_TOPIC_0027371529__text7643046420">ECS</span> running statuses for routine monitoring</li></ul>
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</li><li id="EN-US_TOPIC_0027371530__li6253115215042">The target <span id="EN-US_TOPIC_0027371530__text1764222384412">ECS</span> has been properly running for at least 10 minutes.<p id="EN-US_TOPIC_0027371530__p4456900815042">The monitoring data and graphics are available for a new <span id="EN-US_TOPIC_0027371530__text334910241445">ECS</span> after the <span id="EN-US_TOPIC_0027371530__text19556153795919">ECS</span> runs for at least 10 minutes.</p>
</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0027371530__section44667294224513"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0027371530__ol52641911224530"><li id="EN-US_TOPIC_0027371530__li4015157224530">Log in to the management console.</li><li id="EN-US_TOPIC_0027371530__li464234814566">Click <span><img id="EN-US_TOPIC_0027371530__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0027371530__li36136418224530">Under <strong id="EN-US_TOPIC_0027371530__b395133913618"><span id="EN-US_TOPIC_0027371530__text15711551103412">Computing</span></strong>, click <strong id="EN-US_TOPIC_0027371530__b159516391612">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0027371530__li56082099224530">In the search box above the upper right corner of the <span id="EN-US_TOPIC_0027371530__text689872554419">ECS</span> list, enter the <span id="EN-US_TOPIC_0027371530__text32966585590">ECS</span> name, IP address, or ID for search.</li><li id="EN-US_TOPIC_0027371530__li46356152224530">Click the name of the target <span id="EN-US_TOPIC_0027371530__text3112012019">ECS</span>. The page providing details about the <span id="EN-US_TOPIC_0027371530__text554019020">ECS</span> is displayed.</li><li id="EN-US_TOPIC_0027371530__li63860846224530">Click the <strong id="EN-US_TOPIC_0027371530__b384015217013">Monitoring</strong> tab to view the monitoring data.</li><li id="EN-US_TOPIC_0027371530__li327952315319">In the <span id="EN-US_TOPIC_0027371530__text152439289442">ECS</span> monitoring area, select a duration to view the monitoring data.<p id="EN-US_TOPIC_0027371530__p1627202510306">You can view the monitoring data of the <span id="EN-US_TOPIC_0027371530__text109301628194413">ECS</span> in the last 1, 3, or 12 hours.</p>
<div class="section" id="EN-US_TOPIC_0027371530__section44667294224513"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0027371530__ol52641911224530"><li id="EN-US_TOPIC_0027371530__li4015157224530">Log in to the management console.</li><li id="EN-US_TOPIC_0027371530__li464234814566">Click <span><img id="EN-US_TOPIC_0027371530__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0027371530__li36136418224530">Under <strong id="EN-US_TOPIC_0027371530__b97231010119"><span id="EN-US_TOPIC_0027371530__text0723809114">Computing</span></strong>, click <strong id="EN-US_TOPIC_0027371530__b19724809110">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0027371530__li56082099224530">In the search box above the upper right corner of the <span id="EN-US_TOPIC_0027371530__text689872554419">ECS</span> list, enter the <span id="EN-US_TOPIC_0027371530__text32966585590">ECS</span> name, IP address, or ID for search.</li><li id="EN-US_TOPIC_0027371530__li46356152224530">Click the name of the target <span id="EN-US_TOPIC_0027371530__text3112012019">ECS</span>. The page providing details about the <span id="EN-US_TOPIC_0027371530__text554019020">ECS</span> is displayed.</li><li id="EN-US_TOPIC_0027371530__li63860846224530">Click the <strong id="EN-US_TOPIC_0027371530__b384015217013">Monitoring</strong> tab to view the monitoring data.</li><li id="EN-US_TOPIC_0027371530__li327952315319">In the <span id="EN-US_TOPIC_0027371530__text152439289442">ECS</span> monitoring area, select a duration to view the monitoring data.<p id="EN-US_TOPIC_0027371530__p1627202510306">You can view the monitoring data of the <span id="EN-US_TOPIC_0027371530__text109301628194413">ECS</span> in the last 1, 3, or 12 hours.</p>
</li></ol>
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<div id="body1457936839864"><div class="section" id="EN-US_TOPIC_0027371531__section38299792222911"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0027371531__p40311482223529">Setting <span id="EN-US_TOPIC_0027371531__text329816144417">ECS</span> alarm rules allows you to customize the monitored objects and notification policies so that you can closely monitor your <span id="EN-US_TOPIC_0027371531__text1924842620522">ECS</span>s.</p>
<p id="EN-US_TOPIC_0027371531__p22430771222915">This section describes how to set <span id="EN-US_TOPIC_0027371531__text17138103144412">ECS</span> alarm rules, including alarm rule names, monitoring objects, monitoring metrics, alarm thresholds, monitoring intervals, and notifications.</p>
</div>
<div class="section" id="EN-US_TOPIC_0027371531__section7969360222918"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0027371531__ol4340316622382"><li id="EN-US_TOPIC_0027371531__li5508418122382">Log in to the management console.</li><li id="EN-US_TOPIC_0027371531__li464234814566">Click <span><img id="EN-US_TOPIC_0027371531__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0027371531__li2599558622382">Under <strong id="EN-US_TOPIC_0027371531__b842352706143818">Management &amp; Deployment</strong>, click <strong id="EN-US_TOPIC_0027371531__b842352706143835">Cloud Eye</strong>.</li><li id="EN-US_TOPIC_0027371531__li13187821225633">In the navigation pane on the left, choose <strong id="EN-US_TOPIC_0027371531__b842352706141717">Alarm Management</strong> &gt; <strong id="EN-US_TOPIC_0027371531__b842352706141723">Alarm Rules</strong>.</li><li id="EN-US_TOPIC_0027371531__li32623014182110">On the <strong id="EN-US_TOPIC_0027371531__b842352706151722">Alarm Rules</strong> page, click <strong id="EN-US_TOPIC_0027371531__b842352706151737">Create Alarm Rule</strong> to create an alarm rule, or modify an existing alarm rule.<p id="EN-US_TOPIC_0027371531__p25089226182136">The following operations use modifying an existing alarm rule as an example.</p>
<div class="section" id="EN-US_TOPIC_0027371531__section7969360222918"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0027371531__ol4340316622382"><li id="EN-US_TOPIC_0027371531__li5508418122382">Log in to the management console.</li><li id="EN-US_TOPIC_0027371531__li464234814566">Click <span><img id="EN-US_TOPIC_0027371531__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0027371531__li2599558622382">Click <strong id="EN-US_TOPIC_0027371531__b10874355131810">Service List</strong>. Under <strong id="EN-US_TOPIC_0027371531__b1871963610162">Management &amp; Deployment</strong>, select <strong id="EN-US_TOPIC_0027371531__b2720236131611">Cloud Eye</strong>.</li><li id="EN-US_TOPIC_0027371531__li13187821225633">In the navigation pane on the left, choose <strong id="EN-US_TOPIC_0027371531__b842352706141717">Alarm Management</strong> &gt; <strong id="EN-US_TOPIC_0027371531__b842352706141723">Alarm Rules</strong>.</li><li id="EN-US_TOPIC_0027371531__li32623014182110">On the <strong id="EN-US_TOPIC_0027371531__b842352706151722">Alarm Rules</strong> page, click <strong id="EN-US_TOPIC_0027371531__b842352706151737">Create Alarm Rule</strong> to create an alarm rule, or modify an existing alarm rule.<p id="EN-US_TOPIC_0027371531__p25089226182136">The following uses modifying an existing alarm rule as an example.</p>
<ol type="a" id="EN-US_TOPIC_0027371531__ol1418093822382"><li id="EN-US_TOPIC_0027371531__li27152355173633">Click the target alarm rule.</li><li id="EN-US_TOPIC_0027371531__li6051958522382">Click <strong id="EN-US_TOPIC_0027371531__b84235270616432">Modify</strong> in the upper right corner of the page.</li><li id="EN-US_TOPIC_0027371531__li780535922382">In the <strong id="EN-US_TOPIC_0027371531__b50226220151959">Modify Alarm Rule</strong> dialog box shown in <a href="#EN-US_TOPIC_0027371531__fig5398007222382">Figure 1</a>, set the parameters as prompted.<div class="fignone" id="EN-US_TOPIC_0027371531__fig5398007222382"><a name="EN-US_TOPIC_0027371531__fig5398007222382"></a><a name="fig5398007222382"></a><span class="figcap"><b>Figure 1 </b>Modifying an alarm rule</span><br><span><img id="EN-US_TOPIC_0027371531__image1743484863710" src="en-us_image_0022382203.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0027371531__li438155322382">Click <strong>OK</strong>.<p id="EN-US_TOPIC_0027371531__p48954978174047">After an alarm rule is modified, the system automatically notifies you of an alarm when the alarm complying with the alarm rule is generated.</p>
</li><li id="EN-US_TOPIC_0027371531__li438155322382">Click <strong id="EN-US_TOPIC_0027371531__b15901629194810">Modify</strong>.<p id="EN-US_TOPIC_0027371531__p48954978174047">After an alarm rule is modified, the system automatically notifies you of an alarm when the alarm complying with the alarm rule is generated.</p>
</li></ol>
<div class="note" id="EN-US_TOPIC_0027371531__note3330132182216"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0027371531__p1690110337325">For more information about <span id="EN-US_TOPIC_0027371531__text660581185514">ECS</span> alarm rules, see <em id="EN-US_TOPIC_0027371531__i21479162552">Cloud Eye User Guide</em>.</p>
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<h1 class="topictitle1">Can an <span id="text4310151463118">ECS</span> Without an EIP Access the Internet?</h1>
<div id="body1462258683339"><p id="EN-US_TOPIC_0030013188__p952982715405">Yes.</p>
<ul id="EN-US_TOPIC_0030013188__ul7474103416333"><li id="EN-US_TOPIC_0030013188__li647416348336">Method 1: Configure a SNAT server.<p id="EN-US_TOPIC_0030013188__p153115102379"><a name="EN-US_TOPIC_0030013188__li647416348336"></a><a name="li647416348336"></a>You can configure the SNAT server so that the ECS without an EIP bound can access the Internet.</p>
<p id="EN-US_TOPIC_0030013188__p91951736113914">For details, see <a href="https://docs.otc.t-systems.com/en-us/usermanual/vpc/vpc_route_0004.html" target="_blank" rel="noopener noreferrer">"Configuring an SNAT Server"</a> in <em id="EN-US_TOPIC_0030013188__i1572269656">Virtual Private Cloud User Guide</em>.</p>
<p id="EN-US_TOPIC_0030013188__p91951736113914">For details, see <a href="https://docs.otc.t-systems.com/en-us/usermanual/vpc/vpc_route_0004.html" target="_blank" rel="noopener noreferrer">"Configuring an SNAT Server"</a> in <em id="EN-US_TOPIC_0030013188__i1285576725">Virtual Private Cloud User Guide</em>.</p>
</li><li id="EN-US_TOPIC_0030013188__li14100173743318">Method 2: Create a NAT gateway.<p id="EN-US_TOPIC_0030013188__p6943173893214"><a name="EN-US_TOPIC_0030013188__li14100173743318"></a><a name="li14100173743318"></a>If a large number of concurrent connections are required, it is a good practice to use the NAT Gateway service provided by the cloud platform.</p>
<p id="EN-US_TOPIC_0030013188__p19505735172914">The NAT Gateway service offers the NAT function for ECSs in a VPC, allowing these ECSs to access the Internet using an EIP. For more information about NAT Gateway, see <em id="EN-US_TOPIC_0030013188__i8423526979632">NAT Gateway User Guide</em>.</p>
</li></ul>

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<a name="EN-US_TOPIC_0030828254"></a><a name="EN-US_TOPIC_0030828254"></a>
<h1 class="topictitle1">Images</h1>
<h1 class="topictitle1">Image Types</h1>
<div id="body8662426"><div class="section" id="EN-US_TOPIC_0030828254__en-us_topic_0027498836_section6105436615564"><h4 class="sectiontitle">What Is Image?</h4><p id="EN-US_TOPIC_0030828254__p5290031521543">An image is an <span id="EN-US_TOPIC_0030828254__text169521139133911">ECS</span> template that contains an OS and may also contain proprietary software and application software, such as database software. You can use images to create <span id="EN-US_TOPIC_0030828254__text17412026105012">ECS</span>s.</p>
<p id="EN-US_TOPIC_0030828254__en-us_topic_0027498836_p37701211163751">Images can be public or private. Public images are provided by the system by default, and private images are manually created. You can use any type of image to create an <span id="EN-US_TOPIC_0030828254__text144644919398">ECS</span>. You can also create a private image using an existing <span id="EN-US_TOPIC_0030828254__text1397395119390">ECS</span> or external image. This provides you with a simple and fast way to create <span id="EN-US_TOPIC_0030828254__text8975142918523">ECS</span>s tailored to your needs. For example, if you use web services, your image can contain web server configurations, static configurations, and dynamic page code. After you use this image to create an <span id="EN-US_TOPIC_0030828254__text886165716394">ECS</span>, the web server will run on the newly created ECS.</p>
<p id="EN-US_TOPIC_0030828254__en-us_topic_0027498836_p37701211163751">Images can be public or private. Public images are provided by the system by default, and private images are manually created. You can use any type of image to create an <span id="EN-US_TOPIC_0030828254__text144644919398">ECS</span>. You can also create a private image using an existing <span id="EN-US_TOPIC_0030828254__text1397395119390">ECS</span> or external image. This provides you with a simple and fast way to create <span id="EN-US_TOPIC_0030828254__text4488175403915">ECS</span>s tailored to your needs. For example, if you use web services, your image can contain web server configurations, static configurations, and dynamic page code. After you use this image to create an <span id="EN-US_TOPIC_0030828254__text886165716394">ECS</span>, the web server will run on the newly created ECS.</p>
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<div class="section" id="EN-US_TOPIC_0030828254__en-us_topic_0027498836_section31040989164158"><h4 class="sectiontitle">Image Types</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0030828254__en-us_topic_0027498836_table25967296164224" frame="border" border="1" rules="all"><thead align="left"><tr id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_en-us_topic_0029124570_en-us_topic_0029124523_row6204106512614"><th align="left" class="cellrowborder" valign="top" width="18.990000000000002%" id="mcps1.3.2.2.1.3.1.1"><p id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_en-us_topic_0029124570_en-us_topic_0029124523_p5927036212614">Image Type</p>
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<td class="cellrowborder" valign="top" width="81.01%" headers="mcps1.3.2.2.1.3.1.2 "><p id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_p6239130142016">A private image contains an OS or service data, preinstalled public applications, and a user's personal applications. Private images are only available to the users who created them.</p>
<p id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_p978715419106">A private image can be a system disk image, data disk image, or full-ECS image.</p>
<ul id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_ul28904698175326"><li id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_li8388790175326">A system disk image contains an OS and pre-installed software for various services. You can use a system disk image to create ECSs and migrate your services to the cloud.</li><li id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_li46458941175329">A data disk image contains only service data. You can use a data disk image to create EVS disks and use them to migrate your service data to the cloud.</li><li id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_li353442991605">A full-ECS image contains an OS, pre-installed software, and service data. A full-ECS image is created using differential backups and the creation takes less time than creating a system or data disk image of the same size.</li></ul>
<ul id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_ul28904698175326"><li id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_li8388790175326">A system disk image contains an OS and preinstalled software for various services. You can use a system disk image to create ECSs and migrate your services to the cloud.</li><li id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_li46458941175329">A data disk image contains only service data. You can use a data disk image to create EVS disks and use them to migrate your service data to the cloud.</li><li id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_li353442991605">A full-ECS image contains an OS, preinstalled software, and service data. A full-ECS image is created using differential backups and the creation takes less time than creating a system or data disk image of the same size.</li></ul>
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<tr id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_row22261334165248"><td class="cellrowborder" valign="top" width="18.990000000000002%" headers="mcps1.3.2.2.1.3.1.1 "><p id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_p66134282165248"><span class="keyword" id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_keyword290210687151536">Shared image</span></p>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0092494580.html">Service Overview</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0000001351167793.html">Images</a></div>
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<li class="ulchildlink"><strong><a href="en-us_topic_0085634796.html">Initializing a Windows Data Disk (Windows Server 2008)</a></strong><br>
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<li class="ulchildlink"><strong><a href="en-us_topic_0117490178.html">Initializing a Windows Data Disk (Windows Server 2016)</a></strong><br>
<li class="ulchildlink"><strong><a href="en-us_topic_0117490178.html">Initializing a Windows Data Disk (Windows Server 2019)</a></strong><br>
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<li class="ulchildlink"><strong><a href="en-us_topic_0085634797.html">Initializing a Linux Data Disk (fdisk)</a></strong><br>
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<ul id="EN-US_TOPIC_0030878383__ul1499818151265"><li id="EN-US_TOPIC_0030878383__li169988152261">Inbound: Inbound rules allow external network traffic to be sent to the <span id="EN-US_TOPIC_0030878383__text6334450160">ECS</span>s in the security group.</li><li id="EN-US_TOPIC_0030878383__li1399891572612">Outbound: Outbound rules allow network traffic from the <span id="EN-US_TOPIC_0030878383__text16112155519169">ECS</span>s in the security group to be sent out of the security group.</li></ul>
<p id="EN-US_TOPIC_0030878383__p91319310819">For details about the default security group rules, see <em id="EN-US_TOPIC_0030878383__i842352697143119">Virtual Private Cloud User Guide</em>. For details about configuration examples for security group rules, see <a href="en-us_topic_0140323152.html">Security Group Configuration Examples</a>.</p>
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<div class="section" id="EN-US_TOPIC_0030878383__en-us_topic_0029320966_section40712064223843"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0030878383__en-us_topic_0029320966_ol291224422402"><li id="EN-US_TOPIC_0030878383__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0030878383__li464234814566">Click <span><img id="EN-US_TOPIC_0030878383__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0029320966_li50026016224047">Under <strong id="EN-US_TOPIC_0030878383__b17222131144113"><span id="EN-US_TOPIC_0030878383__text662313512324">Computing</span></strong>, click <strong id="EN-US_TOPIC_0030878383__b9223131118412">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0030878383__li34401539214315">On the <strong id="EN-US_TOPIC_0030878383__b9251123218404">Elastic Cloud Server</strong> page, click the name of the target <span id="EN-US_TOPIC_0030878383__text10144144802310">ECS</span>.<p id="EN-US_TOPIC_0030878383__p19982029214319">The page providing details about the <span id="EN-US_TOPIC_0030878383__text826344194018">ECS</span> is displayed.</p>
<div class="section" id="EN-US_TOPIC_0030878383__en-us_topic_0029320966_section40712064223843"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0030878383__en-us_topic_0029320966_ol291224422402"><li id="EN-US_TOPIC_0030878383__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0030878383__li464234814566">Click <span><img id="EN-US_TOPIC_0030878383__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0029320966_li50026016224047">Under <strong id="EN-US_TOPIC_0030878383__b151740248419"><span id="EN-US_TOPIC_0030878383__text111748249418">Computing</span></strong>, click <strong id="EN-US_TOPIC_0030878383__b217515246414">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0030878383__li34401539214315">On the <strong id="EN-US_TOPIC_0030878383__b9251123218404">Elastic Cloud Server</strong> page, click the name of the target <span id="EN-US_TOPIC_0030878383__text10144144802310">ECS</span>.<p id="EN-US_TOPIC_0030878383__p19982029214319">The page providing details about the <span id="EN-US_TOPIC_0030878383__text826344194018">ECS</span> is displayed.</p>
</li><li id="EN-US_TOPIC_0030878383__li45534692214355">Click the <strong id="EN-US_TOPIC_0030878383__b8423527069595">Security Groups</strong> tab, expand the information of the security group, and view security group rules.</li><li id="EN-US_TOPIC_0030878383__li2997365821442">Click the security group ID.<p id="EN-US_TOPIC_0030878383__p5857465521443"><a name="EN-US_TOPIC_0030878383__li2997365821442"></a><a name="li2997365821442"></a>The system automatically switches to the security group details page.</p>
</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0029320966_li110100322530">On the <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b1458122962419">Inbound Rules</strong> tab, click <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b84235270615562">Add Rule</strong>. In the displayed dialog box, set required parameters to add an inbound rule.<p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p10544530320">You can click <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b84235270617413">+</strong> to add more inbound rules.</p>
<div class="fignone" id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_fig1786518124129"><span class="figcap"><b>Figure 1 </b>Add Inbound Rule</span><br><span><img id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_image186617129126" src="en-us_image_0284920908.png" title="Click to enlarge" class="imgResize"></span></div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_table111445216564" width="90%" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Inbound rule parameter description</caption><thead align="left"><tr id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_row1811565205613"><th align="left" class="cellrowborder" valign="top" width="12.55%" id="mcps1.3.2.2.7.5.2.4.1.1"><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p51151452125620"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b144769317">Parameter</strong></p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_table111445216564" width="90%" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Inbound rule parameter description</caption><thead align="left"><tr id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_row1811565205613"><th align="left" class="cellrowborder" valign="top" width="12.55%" id="mcps1.3.2.2.7.5.2.4.1.1"><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p51151452125620"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b715982124">Parameter</strong></p>
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<th align="left" class="cellrowborder" valign="top" width="69.45%" id="mcps1.3.2.2.7.5.2.4.1.2"><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p5115552175613"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b274130243">Description</strong></p>
<th align="left" class="cellrowborder" valign="top" width="69.45%" id="mcps1.3.2.2.7.5.2.4.1.2"><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p5115552175613"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b691416392">Description</strong></p>
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<th align="left" class="cellrowborder" valign="top" width="18%" id="mcps1.3.2.2.7.5.2.4.1.3"><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p711565219563"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b984193573219">Example Value</strong></p>
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<tbody><tr id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_row9115105219562"><td class="cellrowborder" rowspan="2" valign="top" width="12.55%" headers="mcps1.3.2.2.7.5.2.4.1.1 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p151157525565">Protocol &amp; Port</p>
<p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p3510193211510"></p>
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<td class="cellrowborder" valign="top" width="69.45%" headers="mcps1.3.2.2.7.5.2.4.1.2 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p1711515526562"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b1939852442315">Protocol</strong>: The network protocol. Currently, the value can be <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b1834752736">All</strong>, <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b7650782">TCP</strong>, <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b820556115">UDP</strong>, <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b463221084">ICMP</strong>, <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b227049963">GRE</strong>, or others.</p>
<td class="cellrowborder" valign="top" width="69.45%" headers="mcps1.3.2.2.7.5.2.4.1.2 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p1711515526562"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b1939852442315">Protocol</strong>: The network protocol. Currently, the value can be <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b1443367866">All</strong>, <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b1218305018">TCP</strong>, <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b1316684674">UDP</strong>, <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b1409289777">ICMP</strong>, <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b1604725750">GRE</strong>, or others.</p>
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<td class="cellrowborder" valign="top" width="18%" headers="mcps1.3.2.2.7.5.2.4.1.3 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p193908441914">TCP</p>
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<tr id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_row6510532121511"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.7.5.2.4.1.1 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p4115175245613"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b208761925162517">Port</strong>: The port or port range over which the traffic can reach your ECS. The value ranges from 1 to 65535. </p>
<tr id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_row6510532121511"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.7.5.2.4.1.1 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p4115175245613"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b134441812558">Port</strong>: The port or port range over which the traffic can reach your ECS. The value ranges from 1 to 65535. </p>
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<td class="cellrowborder" valign="top" headers="mcps1.3.2.2.7.5.2.4.1.2 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p1551023251511">22, or 22-30</p>
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<tr id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_row511615528561"><td class="cellrowborder" valign="top" width="12.55%" headers="mcps1.3.2.2.7.5.2.4.1.1 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p86899991813">Source</p>
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<td class="cellrowborder" valign="top" width="69.45%" headers="mcps1.3.2.2.7.5.2.4.1.2 "><div class="p" id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p18116175212564">The source of the security group rule. The value can be a single IP address or a security group to allow access from the IP address or instances in the security group. For example:<ul id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_ul12116352195619"><li id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_li18391357452">xxx.xxx.xxx.xxx/32 (IPv4 address)</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_li6529544124510">xxx.xxx.xxx.0/24 (IP address range)</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_li06004484454">0.0.0.0/0 (all IP addresses)</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_li1611612527567">sg-abc (security group)</li></ul>
<td class="cellrowborder" valign="top" width="69.45%" headers="mcps1.3.2.2.7.5.2.4.1.2 "><div class="p" id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p18116175212564">The source of the security group rule. The value can be a single IP address or a security group to allow access from IP addresses or instances in the security group. For example:<ul id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_ul12116352195619"><li id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_li18391357452">xxx.xxx.xxx.xxx/32 (IPv4 address)</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_li6529544124510">xxx.xxx.xxx.0/24 (IPv4 address range)</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_li06004484454">0.0.0.0/0 (all IPv4 addresses)</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_li1611612527567">sg-abc (security group)</li></ul>
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<p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p1252129194014">If the source is a security group, this rule will apply to all instances associated with the selected security group.</p>
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</li><li id="EN-US_TOPIC_0030878383__li114871417141">On the <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b663618586245">Outbound Rules</strong> tab, click <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b1398880106">Add Rule</strong>. In the displayed dialog box, set required parameters to add an outbound rule.<p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p161151454111115">You can click <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b842352706174116">+</strong> to add more outbound rules.</p>
</li><li id="EN-US_TOPIC_0030878383__li114871417141">On the <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b663618586245">Outbound Rules</strong> tab, click <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b115789195">Add Rule</strong>. In the displayed dialog box, set required parameters to add an outbound rule.<p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p161151454111115">You can click <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b842352706174116">+</strong> to add more outbound rules.</p>
<div class="fignone" id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_fig11809848184019"><span class="figcap"><b>Figure 2 </b>Add Outbound Rule</span><br><span><img id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_image138102048204017" src="en-us_image_0284993717.png" title="Click to enlarge" class="imgResize"></span></div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_table0614192319232" width="90%" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Outbound rule parameter description</caption><thead align="left"><tr id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_row19614623202312"><th align="left" class="cellrowborder" valign="top" width="12.55%" id="mcps1.3.2.2.8.5.2.4.1.1"><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p361592319230"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b1308829699">Parameter</strong></p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_table0614192319232" width="90%" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Outbound rule parameter description</caption><thead align="left"><tr id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_row19614623202312"><th align="left" class="cellrowborder" valign="top" width="12.55%" id="mcps1.3.2.2.8.5.2.4.1.1"><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p361592319230"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b2145810946">Parameter</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="69.45%" id="mcps1.3.2.2.8.5.2.4.1.2"><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p1961514231232"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b64605891">Description</strong></p>
<th align="left" class="cellrowborder" valign="top" width="69.45%" id="mcps1.3.2.2.8.5.2.4.1.2"><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p1961514231232"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b1795887525">Description</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="18%" id="mcps1.3.2.2.8.5.2.4.1.3"><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p1061552372311"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b78071625745">Example Value</strong></p>
</th>
@ -65,19 +65,19 @@
<tbody><tr id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_row76161523132311"><td class="cellrowborder" rowspan="2" valign="top" width="12.55%" headers="mcps1.3.2.2.8.5.2.4.1.1 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p1761652313238">Protocol &amp; Port</p>
<p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p4616323182310"></p>
</td>
<td class="cellrowborder" valign="top" width="69.45%" headers="mcps1.3.2.2.8.5.2.4.1.2 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p1461632352313"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b114706499477">Protocol</strong>: The network protocol. Currently, the value can be <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b606773792">All</strong>, <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b431440021">TCP</strong>, <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b1142402363">UDP</strong>, <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b272568062">ICMP</strong>, <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b953371851">GRE</strong>, or others.</p>
<td class="cellrowborder" valign="top" width="69.45%" headers="mcps1.3.2.2.8.5.2.4.1.2 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p1461632352313"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b114706499477">Protocol</strong>: The network protocol. Currently, the value can be <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b535370288">All</strong>, <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b862614030">TCP</strong>, <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b438994982">UDP</strong>, <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b532524327">ICMP</strong>, <strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b1450619343">GRE</strong>, or others.</p>
</td>
<td class="cellrowborder" valign="top" width="18%" headers="mcps1.3.2.2.8.5.2.4.1.3 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p157082238193">TCP</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_row5616723112313"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.8.5.2.4.1.1 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p761613239235"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b670323214221">Port</strong>: The port or port range over which the traffic can leave your ECS. The value ranges from 1 to 65535. </p>
<tr id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_row5616723112313"><td class="cellrowborder" valign="top" headers="mcps1.3.2.2.8.5.2.4.1.1 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p761613239235"><strong id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_b942314575568">Port</strong>: The port or port range over which the traffic can leave your ECS. The value ranges from 1 to 65535. </p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.2.2.8.5.2.4.1.2 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p12616182311235">22, or 22-30</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_row2617112315232"><td class="cellrowborder" valign="top" width="12.55%" headers="mcps1.3.2.2.8.5.2.4.1.1 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p15617623172315">Destination</p>
</td>
<td class="cellrowborder" valign="top" width="69.45%" headers="mcps1.3.2.2.8.5.2.4.1.2 "><div class="p" id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p196171823152315">The destination of the security group rule. The value can be a single IP address or a security group to allow access to the IP address or instances in the security group. For example:<ul id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_ul16177237233"><li id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_li8617323202310">xxx.xxx.xxx.xxx/32 (IPv4 address)</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_li10617152312231">xxx.xxx.xxx.0/24 (IP address range)</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_li206171823182318">0.0.0.0/0 (all IP addresses)</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_li6930529354">sg-abc (security group)</li></ul>
<td class="cellrowborder" valign="top" width="69.45%" headers="mcps1.3.2.2.8.5.2.4.1.2 "><div class="p" id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p196171823152315">The destination of the security group rule. The value can be a single IP address or a security group to allow access to IP addresses or instances in the security group. For example:<ul id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_ul16177237233"><li id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_li8617323202310">xxx.xxx.xxx.xxx/32 (IPv4 address)</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_li10617152312231">xxx.xxx.xxx.0/24 (IPv4 address range)</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_li206171823182318">0.0.0.0/0 (all IPv4 addresses)</li><li id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_li6930529354">sg-abc (security group)</li></ul>
</div>
</td>
<td class="cellrowborder" valign="top" width="18%" headers="mcps1.3.2.2.8.5.2.4.1.3 "><p id="EN-US_TOPIC_0030878383__en-us_topic_0118534005_p4617102352310">0.0.0.0/0</p>

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</div>
<div class="section" id="EN-US_TOPIC_0030911465__section24282572112133"><h4 class="sectiontitle">Namespace</h4><p id="EN-US_TOPIC_0030911465__p20731317112133">SYS.ECS</p>
</div>
<div class="section" id="EN-US_TOPIC_0030911465__section1377504154"><h4 class="sectiontitle">ECS Metrics</h4><p id="EN-US_TOPIC_0030911465__p21718060105118"><span id="EN-US_TOPIC_0030911465__text414544214">ECS</span> metrics vary depending on <span id="EN-US_TOPIC_0030911465__text122901057162119">ECS</span> OSs and types. For details, see <a href="#EN-US_TOPIC_0030911465__table1474714113454">Table 1</a>. √ indicates that the metric is supported, and x indicates that the metric is not supported.</p>
<div class="section" id="EN-US_TOPIC_0030911465__section1377504154"><h4 class="sectiontitle">ECS Metrics</h4><p id="EN-US_TOPIC_0030911465__p21718060105118"><span id="EN-US_TOPIC_0030911465__text414544214">ECS</span> metrics vary depending on <span id="EN-US_TOPIC_0030911465__text12333112124214">ECS</span> OSs and types. For details, see <a href="#EN-US_TOPIC_0030911465__table1474714113454">Table 1</a>. √ indicates that the metric is supported, and x indicates that the metric is not supported.</p>
</div>
<div class="tablenoborder"><a name="EN-US_TOPIC_0030911465__table1474714113454"></a><a name="table1474714113454"></a><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0030911465__table1474714113454" frame="border" border="1" rules="all"><caption><b>Table 1 </b>ECS metrics</caption><thead align="left"><tr id="EN-US_TOPIC_0030911465__row12747131114515"><th align="left" class="cellrowborder" valign="top" width="36.04%" id="mcps1.3.4.2.4.1.1"><p id="EN-US_TOPIC_0030911465__p11747711184518">Metric</p>
@ -109,7 +109,7 @@
<p id="EN-US_TOPIC_0030911465__p97144516550">The monitoring intervals for the following ECSs with raw monitoring metrics are as follows:</p>
<ul id="EN-US_TOPIC_0030911465__ul527772625619"><li id="EN-US_TOPIC_0030911465__li327862685614">KVM <span id="EN-US_TOPIC_0030911465__text888451217254">ECS</span>: 5 minutes</li></ul>
<div class="tablenoborder"><a name="EN-US_TOPIC_0030911465__table64866324222846"></a><a name="table64866324222846"></a><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0030911465__table64866324222846" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Metric description</caption><thead align="left"><tr id="EN-US_TOPIC_0030911465__row15175257222846"><th align="left" class="cellrowborder" valign="top" width="15%" id="mcps1.3.9.2.7.1.1"><p id="EN-US_TOPIC_0030911465__p55090151112133">Metric</p>
<div class="tablenoborder"><a name="EN-US_TOPIC_0030911465__table64866324222846"></a><a name="table64866324222846"></a><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0030911465__table64866324222846" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Metric description</caption><thead align="left"><tr id="EN-US_TOPIC_0030911465__row15175257222846"><th align="left" class="cellrowborder" valign="top" width="15%" id="mcps1.3.9.2.7.1.1"><p id="EN-US_TOPIC_0030911465__p55090151112133">Metric ID</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="13%" id="mcps1.3.9.2.7.1.2"><p id="EN-US_TOPIC_0030911465__p21236279222846">Parameter</p>
</th>
@ -301,8 +301,8 @@
<td class="cellrowborder" valign="top" width="13%" headers="mcps1.3.9.2.7.1.2 "><p id="EN-US_TOPIC_0030911465__p65605483141717">InfiniBand NIC status</p>
</td>
<td class="cellrowborder" valign="top" width="28.999999999999996%" headers="mcps1.3.9.2.7.1.3 "><p id="EN-US_TOPIC_0030911465__p12443932141717">Status of an InfiniBand NIC on an H2 <span id="EN-US_TOPIC_0030911465__text1413033194319">ECS</span></p>
<p id="EN-US_TOPIC_0030911465__p1325610141717">The system periodically checks the status and returns check results using value <strong id="EN-US_TOPIC_0030911465__b1014565397">0</strong> or <strong id="EN-US_TOPIC_0030911465__b2101420149">1</strong>.</p>
<ul id="EN-US_TOPIC_0030911465__ul94245295397"><li id="EN-US_TOPIC_0030911465__li58084791141959"><strong id="EN-US_TOPIC_0030911465__b83413381197">0</strong>: The system is running properly. That is, the InfiniBand NIC is functional.</li><li id="EN-US_TOPIC_0030911465__li19426429173919"><strong id="EN-US_TOPIC_0030911465__b1776183902">1</strong>: The system is not running properly. That is, the InfiniBand NIC malfunctions. When the physical NIC corresponding to a virtual NIC becomes faulty, for example, the network cable is not securely connected to the NIC, the switch or adapter is incompatible with the InfiniBand NIC, or the NIC is disabled, the returned value is <strong id="EN-US_TOPIC_0030911465__b842352706174428">1</strong>.</li></ul>
<p id="EN-US_TOPIC_0030911465__p1325610141717">The system periodically checks the status and returns check results using value <strong id="EN-US_TOPIC_0030911465__b1245636963">0</strong> or <strong id="EN-US_TOPIC_0030911465__b1424923177">1</strong>.</p>
<ul id="EN-US_TOPIC_0030911465__ul94245295397"><li id="EN-US_TOPIC_0030911465__li58084791141959"><strong id="EN-US_TOPIC_0030911465__b83413381197">0</strong>: The system is running properly. That is, the InfiniBand NIC is functional.</li><li id="EN-US_TOPIC_0030911465__li19426429173919"><strong id="EN-US_TOPIC_0030911465__b497521122">1</strong>: The system is not running properly. That is, the InfiniBand NIC malfunctions. When the physical NIC corresponding to a virtual NIC becomes faulty, for example, the network cable is not securely connected to the NIC, the switch or adapter is incompatible with the InfiniBand NIC, or the NIC is disabled, the returned value is <strong id="EN-US_TOPIC_0030911465__b842352706174428">1</strong>.</li></ul>
<div class="note" id="EN-US_TOPIC_0030911465__note14324438161653"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="EN-US_TOPIC_0030911465__p61811084161653">Only Mellanox EDR 100 GB single-port InfiniBand NICs are supported.</p>
</div></div>
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<a name="EN-US_TOPIC_0031073513"></a><a name="EN-US_TOPIC_0031073513"></a>
<h1 class="topictitle1">Resetting a Login Password</h1>
<h1 class="topictitle1">Passwords</h1>
<div id="body1464272645011"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="en-us_topic_0035643949.html">Application Scenarios for Using Passwords</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0122627689.html">Changing the Login Password on an ECS</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0021426802.html">Resetting the Password for Logging In to a Windows ECS</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0021427650.html">Resetting the Password for Logging In to a Linux ECS</a></strong><br>

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@ -4,11 +4,11 @@
<div id="body1464342274212"><div class="section" id="EN-US_TOPIC_0031107266__section83915017466"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0031107266__p5548482995849">Password authentication is required to log in to a Windows <span id="EN-US_TOPIC_0031107266__text2418174235815">ECS</span>. Therefore, you must use the key file used when you created the <span id="EN-US_TOPIC_0031107266__text9971154710587">ECS</span> to obtain the administrator password generated during <span id="EN-US_TOPIC_0031107266__text120830195810">ECS</span> creation. The administrator user is <strong id="EN-US_TOPIC_0031107266__b2049513373585">Administrator</strong> or the user configured using Cloudbase-Init. This password is randomly generated, offering high security.</p>
<p id="EN-US_TOPIC_0031107266__p703221995027">You can obtain the initial password for logging in to a Windows <span id="EN-US_TOPIC_0031107266__text66814149599">ECS</span> through the management console or APIs. For details, see this section.</p>
</div>
<div class="section" id="EN-US_TOPIC_0031107266__section38475220193847"><h4 class="sectiontitle">Obtaining the Password Through the Management Console</h4><ol id="EN-US_TOPIC_0031107266__ol5405292620557"><li id="EN-US_TOPIC_0031107266__li584178495530">Obtain the private key file (.pem file) used when you created the <span id="EN-US_TOPIC_0031107266__text136800010221">ECS</span>.</li><li id="EN-US_TOPIC_0031107266__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0031107266__li464234814566">Click <span><img id="EN-US_TOPIC_0031107266__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0031107266__en-us_topic_0029320966_li40039532224047">Under <strong id="EN-US_TOPIC_0031107266__b4854133017388"><span id="EN-US_TOPIC_0031107266__text584793015383">Computing</span></strong>, click <strong id="EN-US_TOPIC_0031107266__b188551530113817">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0031107266__en-us_topic_0029320966_li24833369224047">On the <strong id="EN-US_TOPIC_0031107266__b577318918018">Elastic Cloud Server</strong> page, select the target <span id="EN-US_TOPIC_0031107266__text11584529221">ECS</span>.</li><li id="EN-US_TOPIC_0031107266__li46427097215215">In the <strong id="EN-US_TOPIC_0031107266__b695600106">Operation</strong> column, click <strong id="EN-US_TOPIC_0031107266__b308632659">More</strong> and select <strong id="EN-US_TOPIC_0031107266__b77716640">Get Password</strong>.</li><li id="EN-US_TOPIC_0031107266__li50525424215555">Use either of the following methods to obtain the password through the key file:<ul id="EN-US_TOPIC_0031107266__ul6527186921565"><li id="EN-US_TOPIC_0031107266__li1887355017131">Click <strong id="EN-US_TOPIC_0031107266__b842352706144939">Select File</strong> and upload the key file from a local directory.</li><li id="EN-US_TOPIC_0031107266__li42486460215639">Copy the key file content to the text field.</li></ul>
<div class="section" id="EN-US_TOPIC_0031107266__section38475220193847"><h4 class="sectiontitle">Obtaining the Password Through the Management Console</h4><ol id="EN-US_TOPIC_0031107266__ol5405292620557"><li id="EN-US_TOPIC_0031107266__li584178495530">Obtain the private key file (.pem file) used when you created the <span id="EN-US_TOPIC_0031107266__text136800010221">ECS</span>.</li><li id="EN-US_TOPIC_0031107266__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0031107266__li464234814566">Click <span><img id="EN-US_TOPIC_0031107266__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0031107266__en-us_topic_0029320966_li40039532224047">Under <strong id="EN-US_TOPIC_0031107266__b1270110994914"><span id="EN-US_TOPIC_0031107266__text370109104910">Computing</span></strong>, click <strong id="EN-US_TOPIC_0031107266__b12702109164919">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0031107266__en-us_topic_0029320966_li24833369224047">On the <strong id="EN-US_TOPIC_0031107266__b577318918018">Elastic Cloud Server</strong> page, select the target <span id="EN-US_TOPIC_0031107266__text11584529221">ECS</span>.</li><li id="EN-US_TOPIC_0031107266__li46427097215215">In the <strong id="EN-US_TOPIC_0031107266__b1417298090">Operation</strong> column, click <strong id="EN-US_TOPIC_0031107266__b1411244636">More</strong> and select <strong id="EN-US_TOPIC_0031107266__b310991290">Get Password</strong>.</li><li id="EN-US_TOPIC_0031107266__li50525424215555">Use either of the following methods to obtain the password through the key file:<ul id="EN-US_TOPIC_0031107266__ul6527186921565"><li id="EN-US_TOPIC_0031107266__li1887355017131">Click <strong id="EN-US_TOPIC_0031107266__b842352706144939">Select File</strong> and upload the key file from a local directory.</li><li id="EN-US_TOPIC_0031107266__li42486460215639">Copy the key file content to the text field.</li></ul>
</li><li id="EN-US_TOPIC_0031107266__li18672759215816">Click <strong id="EN-US_TOPIC_0031107266__b102668266317244">Get Password</strong> to obtain a random password.</li></ol>
</div>
<div class="section" id="EN-US_TOPIC_0031107266__section1118765310423"><h4 class="sectiontitle">Obtaining the Password Through APIs</h4><ol id="EN-US_TOPIC_0031107266__ol507546510433"><li id="EN-US_TOPIC_0031107266__li17213488101942">Obtain the private key file (.pem file) used when you created the <span id="EN-US_TOPIC_0031107266__text356411314017">ECS</span>.</li><li id="EN-US_TOPIC_0031107266__li1110886810299">Set up the API calling environment.</li><li id="EN-US_TOPIC_0031107266__li54866977184131">Call APIs. For details, see <a href="https://docs.otc.t-systems.com/api/ecs/en-us_topic_0020805967.html" target="_blank" rel="noopener noreferrer">API Usage Guidelines</a> in <em id="EN-US_TOPIC_0031107266__i84235269711913">Elastic Cloud Server API Reference</em>.</li><li id="EN-US_TOPIC_0031107266__li5770130102852"><a name="EN-US_TOPIC_0031107266__li5770130102852"></a><a name="li5770130102852"></a>Obtain the ciphertext password.<p id="EN-US_TOPIC_0031107266__p44462590102854"><a name="EN-US_TOPIC_0031107266__li5770130102852"></a><a name="li5770130102852"></a>Call the password obtaining APIs to obtain the ciphertext password of the public key encrypted using RSA. The API URI is in the format "GET /v2/{<em id="EN-US_TOPIC_0031107266__i842352697152819">tenant_id</em>}/servers/{<em id="EN-US_TOPIC_0031107266__i842352697152825">server_id</em>}/os-server-password".</p>
<div class="note" id="EN-US_TOPIC_0031107266__note58305696141012"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0031107266__p54989223141012">For instructions about how to call the APIs, see <a href="https://docs.otc.t-systems.com/api/ecs/en-us_topic_0031176553.html" target="_blank" rel="noopener noreferrer">Retrieving the Password for Logging In to a Windows ECS (Native OpenStack API)</a> in <em id="EN-US_TOPIC_0031107266__i84235269722537">Elastic Cloud Server API Reference</em>.</p>
<div class="note" id="EN-US_TOPIC_0031107266__note58305696141012"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0031107266__p54989223141012">For details, see <a href="https://docs.otc.t-systems.com/api/ecs/en-us_topic_0031176553.html" target="_blank" rel="noopener noreferrer">Obtaining the Password for Logging In to an ECS</a>.</p>
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</li><li id="EN-US_TOPIC_0031107266__li20331687102654">Decrypt the ciphertext password.<p id="EN-US_TOPIC_0031107266__p28094918102655"><a name="EN-US_TOPIC_0031107266__li20331687102654"></a><a name="li20331687102654"></a>Use the private key file used when you created the ECS to decrypt the ciphertext password obtained in step <a href="#EN-US_TOPIC_0031107266__li5770130102852">4</a>.</p>
<ol type="a" id="EN-US_TOPIC_0031107266__ol27402695153412"><li id="EN-US_TOPIC_0031107266__li45297668153412">Run the following command to convert the ciphertext password format to ".key -nocrypt" using OpenSSL:<p id="EN-US_TOPIC_0031107266__p60327754154216"><a name="EN-US_TOPIC_0031107266__li45297668153412"></a><a name="li45297668153412"></a><strong id="EN-US_TOPIC_0031107266__b46168377154226">openssl pkcs8 -topk8 -inform PEM -outform DER -in rsa_pem.key -out pkcs8_der.key -nocrypt</strong></p>
@ -18,7 +18,7 @@
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<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0140313881.html">Passwords and Key Pairs</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0000001234183498.html">Obtaining and Deleting the Password of an Windows ECS</a></div>
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<div id="body1464342274213"><div class="section" id="EN-US_TOPIC_0031107267__section39747844174914"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0031107267__p430025032259">After you obtain the initial password, it is a good practice to delete it to ensure system security.</p>
<p id="EN-US_TOPIC_0031107267__p5287502922531">Deleting the initial password does not affect <span id="EN-US_TOPIC_0031107267__text12833918122219">ECS</span> operation or login. Once deleted, the password cannot be retrieved. Before you delete a password, it is a good practice to record it.</p>
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<div class="section" id="EN-US_TOPIC_0031107267__section2644336121598"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0031107267__ol5405292620557"><li id="EN-US_TOPIC_0031107267__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0031107267__li464234814566">Click <span><img id="EN-US_TOPIC_0031107267__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0031107267__en-us_topic_0029320966_li40039532224047">Under <strong id="EN-US_TOPIC_0031107267__b4751240123811"><span id="EN-US_TOPIC_0031107267__text97451401388">Computing</span></strong>, click <strong id="EN-US_TOPIC_0031107267__b10752174093811">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0031107267__en-us_topic_0029320966_li24833369224047">On the <strong id="EN-US_TOPIC_0031107267__b165659201067">Elastic Cloud Server</strong> page, select the target <span id="EN-US_TOPIC_0031107267__text105654207620">ECS</span>.</li><li id="EN-US_TOPIC_0031107267__li46427097215215">In the <strong id="EN-US_TOPIC_0031107267__b84235270612174">Operation</strong> column, click <strong id="EN-US_TOPIC_0031107267__b84235270612177">More</strong> and select <strong id="EN-US_TOPIC_0031107267__b842352706121710">Delete Password</strong>.<p id="EN-US_TOPIC_0031107267__p9631509215432">The system displays a message, asking you whether you want to delete the password.</p>
<div class="section" id="EN-US_TOPIC_0031107267__section2644336121598"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0031107267__ol5405292620557"><li id="EN-US_TOPIC_0031107267__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0031107267__li464234814566">Click <span><img id="EN-US_TOPIC_0031107267__en-us_topic_0014250631_image1862675853202121" src="en-us_image_0210779229.png"></span> in the upper left corner and select your region and project.</li><li id="EN-US_TOPIC_0031107267__en-us_topic_0029320966_li40039532224047">Under <strong id="EN-US_TOPIC_0031107267__b18298193517572"><span id="EN-US_TOPIC_0031107267__text1729813355573">Computing</span></strong>, click <strong id="EN-US_TOPIC_0031107267__b8298735145713">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0031107267__en-us_topic_0029320966_li24833369224047">On the <strong id="EN-US_TOPIC_0031107267__b165659201067">Elastic Cloud Server</strong> page, select the target <span id="EN-US_TOPIC_0031107267__text105654207620">ECS</span>.</li><li id="EN-US_TOPIC_0031107267__li46427097215215">In the <strong id="EN-US_TOPIC_0031107267__b84235270612174">Operation</strong> column, click <strong id="EN-US_TOPIC_0031107267__b84235270612177">More</strong> and select <strong id="EN-US_TOPIC_0031107267__b842352706121710">Delete Password</strong>.<p id="EN-US_TOPIC_0031107267__p9631509215432">The system displays a message, asking you whether you want to delete the password.</p>
</li><li id="EN-US_TOPIC_0031107267__li18672759215816">Click <strong id="EN-US_TOPIC_0031107267__b842352706145910">OK</strong> to delete the password.</li></ol>
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</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0140313881.html">Passwords and Key Pairs</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0000001234183498.html">Obtaining and Deleting the Password of an Windows ECS</a></div>
</div>
</div>

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