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Added cloud backup parameters in Step 3: Configure Advanced Settings.

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Reviewed-by: Pristromskaia, Margarita <margarita.pristromskaia@t-systems.com>
Co-authored-by: Huijuan, Wang <wanghuijuan738@noreply.gitea.eco.tsi-dev.otc-service.com>
Co-committed-by: Huijuan, Wang <wanghuijuan738@noreply.gitea.eco.tsi-dev.otc-service.com>
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Huijuan, Wang 2024-08-02 15:50:16 +00:00 committed by zuul
parent 18d6c31e36
commit e2322cfa17
100 changed files with 3263 additions and 2924 deletions
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<a name="EN-US_TOPIC_0000001174675379"></a><a name="EN-US_TOPIC_0000001174675379"></a>
<h1 class="topictitle1">Fault Recovery</h1>
<div id="body0000001174675379"><p id="EN-US_TOPIC_0000001174675379__p20258120201813">Cloud Backup and Recovery (CBR) lets you back up and restore data in case of a failure. If an ECS or EVS disk is faulty or data is deleted accidentally, you can use data backups to quickly restore data.</p>
<div class="section" id="EN-US_TOPIC_0000001174675379__section4212145215467"><h4 class="sectiontitle">What Is <span id="EN-US_TOPIC_0000001174675379__text17760154163110">CBR</span>?</h4><p id="EN-US_TOPIC_0000001174675379__p768573334718"><span id="EN-US_TOPIC_0000001174675379__text13778059173112">CBR</span> enables you to back up <span id="EN-US_TOPIC_0000001174675379__text3335111912335">ECS</span>s and EVS disks with ease. If any exceptions occur, such as virus attack, accidental deletion, or software or hardware fault, you can restore data to any point in the past when the data was backed up.</p>
<p id="EN-US_TOPIC_0000001174675379__p96851733104714"><span id="EN-US_TOPIC_0000001174675379__text5258162673219">CBR</span> secures your services by ensuring the security and consistency of your data.</p>
</div>
<div class="section" id="EN-US_TOPIC_0000001174675379__section1660873164114"><h4 class="sectiontitle">Differences Between Cloud Server Backup and Cloud Disk Backup</h4><div class="p" id="EN-US_TOPIC_0000001174675379__p1852521716489">You can back up ECS data using Cloud Server Backup or Cloud Disk Backup.<ul id="EN-US_TOPIC_0000001174675379__ul18366112610528"><li id="EN-US_TOPIC_0000001174675379__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_0000001174675379__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="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001174675379__table1210762195612" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Differences between cloud server backup and cloud disk backup</caption><thead align="left"><tr id="EN-US_TOPIC_0000001174675379__row5108162155613"><th align="left" class="cellrowborder" valign="top" width="18.45184518451845%" id="mcps1.3.3.2.2.2.4.1.1"><p id="EN-US_TOPIC_0000001174675379__p910862155620">Item</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="38.983898389838984%" id="mcps1.3.3.2.2.2.4.1.2"><p id="EN-US_TOPIC_0000001174675379__p210812115563">Cloud Server Backup</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="42.56425642564256%" id="mcps1.3.3.2.2.2.4.1.3"><p id="EN-US_TOPIC_0000001174675379__p5108132112567">Cloud Disk Backup</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0000001174675379__row18108142116562"><td class="cellrowborder" valign="top" width="18.45184518451845%" headers="mcps1.3.3.2.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001174675379__p2108192113563">Resources to be backed up or restored</p>
</td>
<td class="cellrowborder" valign="top" width="38.983898389838984%" headers="mcps1.3.3.2.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001174675379__p2108162119562">All disks (system and data disks) on a server</p>
</td>
<td class="cellrowborder" valign="top" width="42.56425642564256%" headers="mcps1.3.3.2.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001174675379__p0108162118564">One or more specified disks (system or data disks)</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001174675379__row16108152115563"><td class="cellrowborder" valign="top" width="18.45184518451845%" headers="mcps1.3.3.2.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001174675379__p1610802165616">Recommended scenario</p>
</td>
<td class="cellrowborder" valign="top" width="38.983898389838984%" headers="mcps1.3.3.2.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001174675379__p1910832115563">An entire cloud server needs to be protected.</p>
</td>
<td class="cellrowborder" valign="top" width="42.56425642564256%" headers="mcps1.3.3.2.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001174675379__p1110872113568">Only data disks need to be backed up, because the system disk does not contain users' application data.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001174675379__row191080214562"><td class="cellrowborder" valign="top" width="18.45184518451845%" headers="mcps1.3.3.2.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001174675379__p7108112115563">Advantages</p>
</td>
<td class="cellrowborder" valign="top" width="38.983898389838984%" headers="mcps1.3.3.2.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001174675379__p4108921195616">All disks on a server are backed up at the same time, ensuring data consistency.</p>
</td>
<td class="cellrowborder" valign="top" width="42.56425642564256%" headers="mcps1.3.3.2.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001174675379__p1810812215569">Backup cost is reduced without compromising data security.</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0092435778.html">Security</a></div>
</div>
</div>

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<h1 class="topictitle1">Quota Adjustment</h1>
<div id="body0000001210881033"><div class="section" id="EN-US_TOPIC_0000001210881033__section15918030161717"><h4 class="sectiontitle">What Is Quota?</h4><p id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_p1415804616467">Quotas can limit the number or amount of resources available to users, such as the maximum number of ECSs or EVS disks that can be created.</p>
<div id="body0000001210881033"><div class="section" id="EN-US_TOPIC_0000001210881033__section15918030161717"><h4 class="sectiontitle">What Is Quota?</h4><p id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_p1415804616467">Quotas can limit the number or amount of resources available to users, such as the maximum number of <span id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_text5492174012487">ECSs</span> or EVS disks that can be created.</p>
<p id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_p547171214515">If the existing resource quota cannot meet your service requirements, you can apply for a higher quota.</p>
</div>
<div class="section" id="EN-US_TOPIC_0000001210881033__section1738715171810"><h4 class="sectiontitle">How Do I View My Quotas?</h4><ol id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_ol1222775692215"><li id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_li5648642910048">Log in to the management console.</li><li id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_li464234814566">Click <span><img id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_en-us_topic_0014250631_en-us_topic_0014250631_image1733511156361" src="en-us_image_0275513364.png"></span> in the upper left corner and select the desired region and project.</li><li id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_li3861581410048">In the upper right corner of the page, click <span><img id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_image99377514309" src="en-us_image_0152727234.png"></span>.<p id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_p1748884433119">The <strong id="EN-US_TOPIC_0000001210881033__en-us_topic_0040259342_b695801964614">Service Quota</strong> page is displayed.</p>

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<h1 class="topictitle1">How Do I Fix File Creation Failures Due to Inode Exhaustion?</h1>
<div id="body32001227"><div class="section" id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_section838705415374"><h4 class="sectiontitle">Symptom</h4><p id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_p56151259113710">When you create a file or directory, you get the error message "No space left on device", "Cannot create directory", or "Couldn't create temporary archive name."</p>
</div>
<div class="section" id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_section9571438103818"><h4 class="sectiontitle">Possible Causes</h4><p id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_p10146152621516">In Linux, both of the following use the disk space:</p>
<div class="section" id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_section9571438103818"><h4 class="sectiontitle">Possible Cause</h4><p id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_p10146152621516">In Linux, both of the following use the disk space:</p>
<ul id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_ul39571329121511"><li id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_li12451203817152">Data</li><li id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_li695732971517">Inode</li></ul>
<div class="note" id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_note0257130151015"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_p425853081018">An inode (index node) stores metadata of a file system object, such as a file, directory, device file, socket, and pipe in the file system, but does not contain the object's data and filename.</p>
</div></div>
</div>
<div class="section" id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_section20737154134010"><h4 class="sectiontitle">Constraints</h4><p id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_p531427154013">The procedures described in this section involve disk initialization. Back up data in advance.</p>
</div>
<div class="section" id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_section1424817864319"><h4 class="sectiontitle">Solution</h4><ol id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_ol9181346101110"><li id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_li01854611113">Run the following command to check the available space on the disk:<p id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_p16215162018432"><a name="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_li01854611113"></a><a name="en-us_topic_0176850943_li01854611113"></a><strong id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_b417672714433"># df -h</strong></p>
<div class="section" id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_section1424817864319"><h4 class="sectiontitle">Solution</h4><ol id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_ol9181346101110"><li id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_li01854611113">Run the following command to check the available space on the disk:<p id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_p16215162018432"><a name="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_li01854611113"></a><a name="en-us_topic_0176850943_li01854611113"></a><strong id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_b417672714433">df -h</strong></p>
<div class="fignone" id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_fig20632111816415"><a name="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_fig20632111816415"></a><a name="en-us_topic_0176850943_fig20632111816415"></a><span class="figcap"><b>Figure 1 </b>Checking the available disk space</span><br><span><img id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_image4632718124110" src="en-us_image_0183478729.png" title="Click to enlarge" class="imgResize"></span></div>
<p id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_p896311222139">As shown in <a href="#EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_fig20632111816415">Figure 1</a>, the disk still has enough available space.</p>
</li><li id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_li76111232171216">Run the following command to check the available inodes on the disk:<p id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_p6201832114217"><a name="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_li76111232171216"></a><a name="en-us_topic_0176850943_li76111232171216"></a><strong id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_b259723664210"># df -i</strong></p>
</li><li id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_li76111232171216">Run the following command to check the available inodes on the disk:<p id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_p6201832114217"><a name="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_li76111232171216"></a><a name="en-us_topic_0176850943_li76111232171216"></a><strong id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_b259723664210">df -i</strong></p>
<p id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_p61201515134211">If the value of <strong id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_b689117190339">Use%</strong> in the command output is <strong id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_b566262553313">100%</strong>, inodes are used up. Perform the following operations to free up inodes:</p>
<ol type="a" id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_ol189711240111417"><li id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_li1404113819140">Archive files in all directories.<p id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_p1359315555146"><a name="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_li1404113819140"></a><a name="en-us_topic_0176850943_li1404113819140"></a><strong id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_b453623963319"># tar czvf /tmp/backup.tar.gz /home/data</strong></p>
<ol type="a" id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_ol189711240111417"><li id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_li1404113819140">Archive files in all directories.<p id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_p1359315555146"><a name="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_li1404113819140"></a><a name="en-us_topic_0176850943_li1404113819140"></a><strong id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_b453623963319">tar czvf /tmp/backup.tar.gz /home/data</strong></p>
</li><li id="EN-US_TOPIC_0000001597810477__en-us_topic_0176850943_li15405173801410">Delete unnecessary files to release inodes.</li></ol>
</li></ol>
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</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0183016706.html">Resources and Tags</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0030893661.html">Viewing ECS Information</a></div>
</div>
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<h1 class="topictitle1">Reinstalling or Changing the OS</h1>
<div id="body0000001983533061"><p id="EN-US_TOPIC_0000001983533061__p8060118"></p>
</div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="en-us_topic_0024911405.html">Reinstalling the OS</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0031523135.html">Changing the OS</a></strong><br>
</li>
</ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0013771097.html">Instances</a></div>
</div>
</div>

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<a name="EN-US_TOPIC_0013771089"></a><a name="EN-US_TOPIC_0013771089"></a>
<h1 class="topictitle1">Login Overview</h1>
<h1 class="topictitle1">Login Overview (Linux)</h1>
<div id="body13189358"><div class="section" id="EN-US_TOPIC_0013771089__section15584113212291"><h4 class="sectiontitle">Constraints</h4><ul id="EN-US_TOPIC_0013771089__ul133171656112916"><li id="EN-US_TOPIC_0013771089__li1272572019368">Only a running <span id="EN-US_TOPIC_0013771089__text154442415251">ECS</span> can be logged in.</li><li id="EN-US_TOPIC_0013771089__li113176563299">For ECSs created using public images, login usernames, passwords, and constraints vary depending on OSs running on the ECSs. For details, see <em id="EN-US_TOPIC_0013771089__i129215466243"><a href="https://docs.otc.t-systems.com/image-management-service/public-images/" target="_blank" rel="noopener noreferrer">Public Images Introduction</a></em>.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0013771089__section95820318444"><h4 class="sectiontitle">Login Modes</h4><p id="EN-US_TOPIC_0013771089__p649275015440">You can choose from a variety of login modes based on your local OS type.</p>

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<div id="body30896486"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="en-us_topic_0030893661.html">Viewing ECS Information</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0030888079.html">Logging In to a Windows ECS</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0030831990.html">Logging In to a Linux ECS</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0133513874.html">Managing GPU Drivers of GPU-accelerated ECSs</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0176502615.html">Managing ECSs</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0030828258.html">Modifying ECS Specifications</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0133365988.html">Migrating an ECS</a></strong><br>
<li class="ulchildlink"><strong><a href="en-us_topic_0000001983533061.html">Reinstalling or Changing the OS</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0140313879.html">Obtaining Metadata and Passing User Data</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0074752335.html">(Optional) Configuring Mapping Between Hostnames and IP Addresses</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0133513874.html">(Optional) Installing a Driver and Toolkit</a></strong><br>
<li class="ulchildlink"><strong><a href="en-us_topic_0030893661.html">Viewing ECS Information</a></strong><br>
</li>
</ul>
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<a name="EN-US_TOPIC_0013771111"></a><a name="EN-US_TOPIC_0013771111"></a>
<h1 class="topictitle1"><span id="text2029754513432">ECS</span> and Other Services</h1>
<h1 class="topictitle1">ECS and Other Services</h1>
<div id="body41895032"><div class="p" id="EN-US_TOPIC_0013771111__p13479556155412"><a href="#EN-US_TOPIC_0013771111__fig44795566546">Figure 1</a> shows the relationships between ECS and other services.<div class="fignone" id="EN-US_TOPIC_0013771111__fig44795566546"><a name="EN-US_TOPIC_0013771111__fig44795566546"></a><a name="fig44795566546"></a><span class="figcap"><b>Figure 1 </b>Relationships between ECS and other services</span><br><span><img id="EN-US_TOPIC_0013771111__image1379462945514" src="en-us_image_0225439857.png" title="Click to enlarge" class="imgResize"></span></div>
</div>
<div class="section" id="EN-US_TOPIC_0013771111__section5776601918"><h4 class="sectiontitle"><span id="EN-US_TOPIC_0013771111__text492623264014">ECS</span>-related Services</h4><ul id="EN-US_TOPIC_0013771111__ul7006977183330"><li id="EN-US_TOPIC_0013771111__li42353705183333">Auto Scaling (AS)<p id="EN-US_TOPIC_0013771111__p5209059020818"><a name="EN-US_TOPIC_0013771111__li42353705183333"></a><a name="li42353705183333"></a>Automatically adjusts <span id="EN-US_TOPIC_0013771111__text122835134447">ECS</span> resources based on the configured AS policies. This improves resource usage and reduces resource costs.</p>

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</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__b5435723111211"><span id="EN-US_TOPIC_0017130261__text10435152314126">Computing</span></strong>, choose <strong id="EN-US_TOPIC_0017130261__b19435323191214">Elastic Cloud Server</strong>.<p id="EN-US_TOPIC_0017130261__p28383428216">The <strong id="EN-US_TOPIC_0017130261__b66319339129">Elastic Cloud Server</strong> page is displayed. On this page, you can view your <span id="EN-US_TOPIC_0017130261__text1163233151211">ECS</span>s and the basic information about the <span id="EN-US_TOPIC_0017130261__text6638336129">ECS</span>s, such as their specifications, images, and IP addresses.</p>
</li><li id="EN-US_TOPIC_0017130261__li5741957114179">In the search box above the ECS list, select a filter (such as ECS name, ID, or private IP address), enter the corresponding information, and press <strong id="EN-US_TOPIC_0017130261__b20682145420455">Enter</strong>. </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 click the tabs and perform operations. For details, see <a href="en-us_topic_0093492517.html">Changing a Security Group</a>, <a href="en-us_topic_0093492518.html">Adding a Network Interface</a>, <a href="en-us_topic_0183019669.html">Adding Tags</a>, and <a href="en-us_topic_0174917535.html">Binding an EIP</a>.</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 click the tabs and perform operations. For details, see <a href="en-us_topic_0093492517.html">Changing a Security Group</a>, <a href="en-us_topic_0093492518.html">Adding a NIC</a>, <a href="en-us_topic_0183019669.html">Adding Tags</a>, and <a href="en-us_topic_0174917535.html">Binding an EIP</a>.</p>
</li></ol>
</div>
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<h1 class="topictitle1">Remotely Logging In to a Linux <span id="text925441411598">ECS</span> (Using an SSH Key Pair)</h1>
<h1 class="topictitle1">Logging In to a Linux ECS Using an SSH Key Pair</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 use an SSH key pair to remotely log in to a Linux ECS from a Windows and a Linux server, 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 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 ECS Details (List View)</a>.</li></ul>
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<div class="note" id="EN-US_TOPIC_0017955380__note19106747111724"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0017955380__p37743003111724">In the preceding command, replace <em id="EN-US_TOPIC_0017955380__i1681691002125432">path</em> with the actual path where the key file is saved.</p>
</div></div>
</li><li id="EN-US_TOPIC_0017955380__li4142714111724">Run the following command to log in to the <span id="EN-US_TOPIC_0017955380__text1087825831416">ECS</span>:<p id="EN-US_TOPIC_0017955380__p51016140103357"><strong id="EN-US_TOPIC_0017955380__b8935174191314">ssh -i /<em id="EN-US_TOPIC_0017955380__i393524161316">path</em>/kp-123.pem</strong> <em id="EN-US_TOPIC_0017955380__i17658378151627"><strong id="EN-US_TOPIC_0017955380__b46701284151627">Default username</strong></em><strong id="EN-US_TOPIC_0017955380__b7166428201240">@</strong><em id="EN-US_TOPIC_0017955380__i1779413984815"><strong id="EN-US_TOPIC_0017955380__b1951939114818"><span id="EN-US_TOPIC_0017955380__text14536992112">EIP</span></strong></em></p>
<p id="EN-US_TOPIC_0017955380__p34995982103441">For example, if the default username is <strong id="EN-US_TOPIC_0017955380__b1377156563">root</strong> and the <span id="EN-US_TOPIC_0017955380__text1187502510482">EIP</span> is <strong id="EN-US_TOPIC_0017955380__b18875984107">123.123.123.123</strong>, run the following command:</p>
<p id="EN-US_TOPIC_0017955380__p34995982103441">For example, if the default username is <strong id="EN-US_TOPIC_0017955380__b44638592312">root</strong> and the <span id="EN-US_TOPIC_0017955380__text1187502510482">EIP</span> is <strong id="EN-US_TOPIC_0017955380__b18875984107">123.123.123.123</strong>, run the following command:</p>
<p id="EN-US_TOPIC_0017955380__p37284434111724"><strong id="EN-US_TOPIC_0017955380__b2680330715535">ssh -i /<em id="EN-US_TOPIC_0017955380__i15586111724">path</em>/kp-123.pem root@</strong><strong id="EN-US_TOPIC_0017955380__b1890475919385">123.123.123.123</strong></p>
<div class="note" id="EN-US_TOPIC_0017955380__note1262490111724"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0017955380__p5866139194411">In the preceding command:</p>
<ul id="EN-US_TOPIC_0017955380__ul11362411111724"><li id="EN-US_TOPIC_0017955380__li35152842111724"><em id="EN-US_TOPIC_0017955380__i05266161117">path</em> refers to the path under which the key file is stored.</li><li id="EN-US_TOPIC_0017955380__li47940127111724"><em id="EN-US_TOPIC_0017955380__i15286162081218">EIP</em> is the <span id="EN-US_TOPIC_0017955380__text28038290489">EIP</span> bound to the <span id="EN-US_TOPIC_0017955380__text1084392191516">ECS</span>.</li></ul>

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<a name="EN-US_TOPIC_0017955381"></a><a name="EN-US_TOPIC_0017955381"></a>
<h1 class="topictitle1">Remotely Logging In to a Windows <span id="text206627713816">ECS</span> (Using MSTSC)</h1>
<h1 class="topictitle1">Logging In to a Windows ECS Using MSTSC</h1>
<div id="body1437210781594"><div class="section" id="EN-US_TOPIC_0017955381__section119451029135512"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0017955381__p2051937011921">This section describes how to use the remote login tool MSTSC to log in to a Windows <span id="EN-US_TOPIC_0017955381__text1360192010129">ECS</span> from a local computer.</p>
</div>
<div class="section" id="EN-US_TOPIC_0017955381__section30111449112059"><h4 class="sectiontitle">Prerequisites</h4><ul id="EN-US_TOPIC_0017955381__ul23108310112059"><li id="EN-US_TOPIC_0017955381__li18354497116">The target <span id="EN-US_TOPIC_0017955381__text1740721175119">ECS</span> is running.</li><li id="EN-US_TOPIC_0017955381__li21744107205119">You have obtained the password for logging in to the Windows ECS. For details, see <a href="en-us_topic_0031107266.html">Obtaining the Password for Logging In to a Windows ECS</a>.</li><li id="EN-US_TOPIC_0017955381__li6648204112059">You have bound an <span id="EN-US_TOPIC_0017955381__text879438191612">EIP</span> to the <span id="EN-US_TOPIC_0017955381__text127947851619">ECS</span>. For details, see <a href="en-us_topic_0174917535.html">Binding an EIP</a>.</li></ul>
<ul id="EN-US_TOPIC_0017955381__ul59833840112059"><li id="EN-US_TOPIC_0017955381__li1633651112059">Access to port 3389 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_0017955381__li39291782164659">The network connection between the login tool and the target <span id="EN-US_TOPIC_0017955381__text1162262525210">ECS</span> is normal. For example, the default port 3389 is not blocked by the firewall.</li><li id="EN-US_TOPIC_0017955381__li1180914813562">Remote Desktop Protocol (RDP) needs to be enabled on the target <span id="EN-US_TOPIC_0017955381__text16646742165210">ECS</span>. For <span id="EN-US_TOPIC_0017955381__text5312114445215">ECS</span>s created using public images, RDP has been enabled by default. For instructions about how to enable RDP, see <a href="#EN-US_TOPIC_0017955381__section65216898112059">Enabling RDP</a>.</li></ul>
<ul id="EN-US_TOPIC_0017955381__ul59833840112059"><li id="EN-US_TOPIC_0017955381__li1633651112059">Access to port 3389 is allowed in the inbound direction of the security group which the ECS belongs to. For details, see <a href="en-us_topic_0030878383.html">Configuring Security Group Rules</a>.</li><li id="EN-US_TOPIC_0017955381__li39291782164659">The network connection between the login tool and the target <span id="EN-US_TOPIC_0017955381__text1162262525210">ECS</span> is normal. For example, the default port 3389 is not blocked by the firewall.</li><li id="EN-US_TOPIC_0017955381__li1180914813562">Remote Desktop Protocol (RDP) needs to be enabled on the target <span id="EN-US_TOPIC_0017955381__text16646742165210">ECS</span>. For <span id="EN-US_TOPIC_0017955381__text5312114445215">ECS</span>s created using public images, RDP has been enabled by default. For instructions about how to enable RDP, see <a href="#EN-US_TOPIC_0017955381__section65216898112059">Enabling RDP</a>.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0017955381__section1011913410314"><h4 class="sectiontitle">Logging In to a Windows ECS Using MSTSC</h4><p id="EN-US_TOPIC_0017955381__p16299256133">If your local server runs Windows, you can use the remote desktop connection tool MSTSC delivered with the Windows OS to log in to a Windows <span id="EN-US_TOPIC_0017955381__text12183161512">ECS</span>.</p>
<ol id="EN-US_TOPIC_0017955381__ol8411414453"><li id="EN-US_TOPIC_0017955381__li1341101415517">Click the start menu on the local server.</li><li id="EN-US_TOPIC_0017955381__li11411121415519">In the <strong id="EN-US_TOPIC_0017955381__b84235270694226">Search programs and files</strong> text box, enter <strong id="EN-US_TOPIC_0017955381__b84235270694448">mstsc</strong>.</li><li id="EN-US_TOPIC_0017955381__li171035522613">In the <strong id="EN-US_TOPIC_0017955381__b84235270694543">Remote Desktop Connection</strong> dialog box, click <strong id="EN-US_TOPIC_0017955381__b8423527069463">Show Options</strong>.<div class="fignone" id="EN-US_TOPIC_0017955381__en-us_topic_0027290684_fig22996848191913"><span class="figcap"><b>Figure 1 </b>Show Options</span><br><span><img id="EN-US_TOPIC_0017955381__image1150418145412" src="en-us_image_0295941039.png" title="Click to enlarge" class="imgResize"></span></div>

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<a name="EN-US_TOPIC_0017955633"></a><a name="EN-US_TOPIC_0017955633"></a>
<h1 class="topictitle1">Remotely Logging In to a Linux <span id="text95633457599">ECS</span> (Using an SSH Password)</h1>
<h1 class="topictitle1">Logging In to a Linux ECS Using an SSH Password</h1>
<div id="body1437214636583"><div class="section" id="EN-US_TOPIC_0017955633__section193261132111117"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0017955633__p1517515510167">This section describes how to remotely log in to a Linux ECS using an SSH password from a Windows and a Linux server, respectively.</p>
<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__text1549627172318">EIP</span> to the <span id="EN-US_TOPIC_0017955633__text13496177172320">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>
<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 which the ECS belongs to. 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>
<ol id="EN-US_TOPIC_0017955633__ol50344891232730"><li id="EN-US_TOPIC_0017955633__li57514556232730">Use the SSH key to log in to the Linux ECS. For details, see <a href="en-us_topic_0017955380.html">Remotely Logging In to a Linux ECS (Using an SSH Key Pair)</a>.</li><li id="EN-US_TOPIC_0017955633__li10846772232738">Run the following command to change the value of <strong id="EN-US_TOPIC_0017955633__b842352706112840">PasswordAuthentication</strong> in <strong id="EN-US_TOPIC_0017955633__b842352706112849">/etc/ssh/sshd_config</strong> to <strong id="EN-US_TOPIC_0017955633__b842352706112856">yes</strong>:<p id="EN-US_TOPIC_0017955633__p21111801233128"><strong id="EN-US_TOPIC_0017955633__b3444734817347">sudo vi /etc/ssh/sshd_config</strong></p>
<ol id="EN-US_TOPIC_0017955633__ol50344891232730"><li id="EN-US_TOPIC_0017955633__li57514556232730">Use the SSH key to log in to the Linux ECS. For details, see <a href="en-us_topic_0017955380.html">Logging In to a Linux ECS Using an SSH Key Pair</a>.</li><li id="EN-US_TOPIC_0017955633__li10846772232738">Run the following command to change the value of <strong id="EN-US_TOPIC_0017955633__b842352706112840">PasswordAuthentication</strong> in <strong id="EN-US_TOPIC_0017955633__b842352706112849">/etc/ssh/sshd_config</strong> to <strong id="EN-US_TOPIC_0017955633__b842352706112856">yes</strong>:<p id="EN-US_TOPIC_0017955633__p21111801233128"><strong id="EN-US_TOPIC_0017955633__b3444734817347">sudo vi /etc/ssh/sshd_config</strong></p>
<div class="note" id="EN-US_TOPIC_0017955633__note64834529151948"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0017955633__p46639855151948">For the ECSs running the SUSE or OpenSUSE OSs, ensure that the values of <strong id="EN-US_TOPIC_0017955633__b84235270615321">PasswordAuthentication</strong>, <strong id="EN-US_TOPIC_0017955633__b842352706153212">ChallengeResponseAuthentication</strong>, and <strong id="EN-US_TOPIC_0017955633__b842352706153215">UsePAM</strong> in <strong id="EN-US_TOPIC_0017955633__b842352706153225">/etc/ssh/sshd_config</strong> are all <strong id="EN-US_TOPIC_0017955633__b743739488153233">yes</strong>.</p>
</div></div>
</li><li id="EN-US_TOPIC_0017955633__li23794373173045">Run the following command to change the <strong id="EN-US_TOPIC_0017955633__b84235270614583">ssh_pwauth</strong> value to <strong id="EN-US_TOPIC_0017955633__b842352706145830">1</strong> or <strong id="EN-US_TOPIC_0017955633__b842352706145832">true</strong> in <strong id="EN-US_TOPIC_0017955633__b842352706145836">/etc/cloud/cloud.cfg</strong>:<p id="EN-US_TOPIC_0017955633__p1619987173212"><strong id="EN-US_TOPIC_0017955633__b40517810173254">sudo vi /etc/cloud/cloud.cfg</strong></p>

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</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0101604506.html">How Can I Obtain the MAC Address of My ECS?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0115820205.html">How Can I Test Network Performance?</a></strong><br>
<li class="ulchildlink"><strong><a href="en-us_topic_0115820205.html">How Can I Test the Network Performance of Linux ECSs?</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0105130173.html">Why Can't I Use DHCP to Obtain a Private IP Address?</a></strong><br>
</li>

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<h1 class="topictitle1">Reinstalling the OS</h1>
<div id="body1453949350712"><div class="section" id="EN-US_TOPIC_0024911405__section60394636111543"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0024911405__p6371572616452">If the OS of an <span id="EN-US_TOPIC_0024911405__text1677416247272">ECS</span> fails to start or requires optimization, reinstall the OS.</p>
</div>
<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">Remotely Logging In to a Linux ECS (Using an SSH Key Pair)</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>
<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">Logging In to a Linux ECS Using an SSH Key Pair</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 quotas 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__b1522312722812"><span id="EN-US_TOPIC_0024911405__text192220720281">Computing</span></strong>, choose <strong id="EN-US_TOPIC_0024911405__b142247714288">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0024911405__li175538024410">Locate the row containing the target ECS and choose <strong id="EN-US_TOPIC_0024911405__b19767171424715">More</strong> &gt; <strong id="EN-US_TOPIC_0024911405__b192951418194714">Manage Image/Backup</strong> &gt; <strong id="EN-US_TOPIC_0024911405__b11451722134718">Reinstall OS</strong> in the <strong id="EN-US_TOPIC_0024911405__b205161225124715">Operation</strong> column.<p id="EN-US_TOPIC_0024911405__p85531706443">Only stopped <span id="EN-US_TOPIC_0024911405__text193733114464">ECS</span>s support OS reinstallation. If the <span id="EN-US_TOPIC_0024911405__text469190152">ECS</span> is not stopped, stop it before proceeding with reinstallation.</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__b1522312722812"><span id="EN-US_TOPIC_0024911405__text192220720281">Computing</span></strong>, choose <strong id="EN-US_TOPIC_0024911405__b142247714288">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0024911405__li175538024410">Locate the row containing the target ECS and choose <strong id="EN-US_TOPIC_0024911405__b19767171424715">More</strong> &gt; <strong id="EN-US_TOPIC_0024911405__b192951418194714">Manage Image/Backup</strong> &gt; <strong id="EN-US_TOPIC_0024911405__b11451722134718">Reinstall OS</strong> in the <strong id="EN-US_TOPIC_0024911405__b205161225124715">Operation</strong> column.<p id="EN-US_TOPIC_0024911405__p85531706443">Only stopped <span id="EN-US_TOPIC_0024911405__text193733114464">ECS</span>s support OS reinstallation. If the <span id="EN-US_TOPIC_0024911405__text758900146">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">Encrypted</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 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_li5286191313611"><strong id="EN-US_TOPIC_0024911405__en-us_topic_0163572589_b144241223203814">Xrole Name</strong>: set to <strong id="EN-US_TOPIC_0024911405__en-us_topic_0163572589_b443821453912">EVSAccessKMS</strong>, which means 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_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_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>
@ -29,7 +29,7 @@
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0176502615.html">Managing ECSs</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0000001983533061.html">Reinstalling or Changing the OS</a></div>
</div>
</div>

6
docs/ecs/umn/en-us_topic_0027157850.html
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@ -8,9 +8,9 @@
<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__b510317620405"><span id="EN-US_TOPIC_0027157850__text15103463404">Computing</span></strong>, click <strong id="EN-US_TOPIC_0027157850__b12103186114015">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">On the <strong id="EN-US_TOPIC_0027157850__b187181585409">Network Interfaces</strong> tab, click <span><img id="EN-US_TOPIC_0027157850__image16740174871" src="en-us_image_0128851717.png"></span>. Then, disable <strong id="EN-US_TOPIC_0027157850__b171814894016">Source/Destination Check</strong>.<div class="fignone" id="EN-US_TOPIC_0027157850__fig2463867272"><span class="figcap"><b>Figure 1 </b>Disabling source/destination check</span><br><span><img id="EN-US_TOPIC_0027157850__image24641261275" src="en-us_image_0000001659671776.png" title="Click to enlarge" class="imgResize"></span></div>
<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__b510317620405"><span id="EN-US_TOPIC_0027157850__text15103463404">Computing</span></strong>, click <strong id="EN-US_TOPIC_0027157850__b12103186114015">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">On the <strong id="EN-US_TOPIC_0027157850__b9998102114715">NICs</strong> tab, click <span><img id="EN-US_TOPIC_0027157850__image16740174871" src="en-us_image_0128851717.png"></span>. Then, disable <strong id="EN-US_TOPIC_0027157850__b171814894016">Source/Destination Check</strong>.<div class="fignone" id="EN-US_TOPIC_0027157850__fig2463867272"><span class="figcap"><b>Figure 1 </b>Disabling source/destination check</span><br><span><img id="EN-US_TOPIC_0027157850__image24641261275" src="en-us_image_0000001659671776.png" title="Click to enlarge" class="imgResize"></span></div>
<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__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 (Linux)</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>
<pre class="screen" id="EN-US_TOPIC_0027157850__screen63212540113959">64 bytes from 220.181.111.148: icmp_seq=1 ttl=51 time=9.34 ms
@ -40,7 +40,7 @@
</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 2</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 2 </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__b842352706161257"><span id="EN-US_TOPIC_0027157850__text159160124215">Network</span></strong>, click <strong id="EN-US_TOPIC_0027157850__b842352706161254">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. In the route table list, click a target route table. 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__b1136243656">Destination</strong>: indicates the destination network segment. The default value is <strong id="EN-US_TOPIC_0027157850__b1150070724">0.0.0.0/0</strong>.</li><li id="EN-US_TOPIC_0027157850__li43337918113959"><strong id="EN-US_TOPIC_0027157850__b1200696474">Next Hop</strong>: indicates the private IP address of the proxy <span id="EN-US_TOPIC_0027157850__text943815586">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__b842352706161257"><span id="EN-US_TOPIC_0027157850__text159160124215">Network</span></strong>, click <strong id="EN-US_TOPIC_0027157850__b842352706161254">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. In the route table list, click a target route table. 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__b131948031">Destination</strong>: indicates the destination network segment. The default value is <strong id="EN-US_TOPIC_0027157850__b1138886271">0.0.0.0/0</strong>.</li><li id="EN-US_TOPIC_0027157850__li43337918113959"><strong id="EN-US_TOPIC_0027157850__b696770382">Next Hop</strong>: indicates the private IP address of the proxy <span id="EN-US_TOPIC_0027157850__text573849155">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>

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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</span></p>
</td>
<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_p573813017812">A shared image is a private image another user has shared with you.</p>
<p id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_p7991323165259">For more information about shared images, see "Sharing Images" in <em id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_i135011121165718">Image Management Service User Guide</em>.</p>
<p id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_p7991323165259">For more information, see "Sharing Images" in <em id="EN-US_TOPIC_0030828254__en-us_topic_0013901609_i135011121165718">Image Management Service User Guide</em>.</p>
</td>
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<p id="EN-US_TOPIC_0030828257__p1388113065018">Your account automatically comes with a default security group. The default security group allows all outbound data, denies all inbound data, and allows all data between <span id="EN-US_TOPIC_0030828257__text192935571406">ECS</span>s in the group. Your <span id="EN-US_TOPIC_0030828257__text148441317613">ECS</span>s in the security group can communicate with each other without the need to add rules.</p>
<div class="fignone" id="EN-US_TOPIC_0030828257__fig11890174421819"><span class="figcap"><b>Figure 1 </b>Default security group</span><br><span><img class="imgResize" id="EN-US_TOPIC_0030828257__en-us_topic_0118534003_image22171236172514" src="en-us_image_0000001230120807.png" title="Click to enlarge"></span></div>
<p id="EN-US_TOPIC_0030828257__p511784554512"></p>
<p id="EN-US_TOPIC_0030828257__p14738751115618"><a href="#EN-US_TOPIC_0030828257__table1580115155277">Table 1</a> describes default security group rules.</p>
<p id="EN-US_TOPIC_0030828257__p14738751115618"><a href="#EN-US_TOPIC_0030828257__table1580115155277">Table 1</a> describes the rules in the default security group.</p>
<div class="tablenoborder"><a name="EN-US_TOPIC_0030828257__table1580115155277"></a><a name="table1580115155277"></a><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0030828257__table1580115155277" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Default security group rules</caption><thead align="left"><tr id="EN-US_TOPIC_0030828257__en-us_topic_0118534003_row12930145141920"><th align="left" class="cellrowborder" valign="top" width="11.83%" id="mcps1.3.3.7.2.6.1.1"><p id="EN-US_TOPIC_0030828257__en-us_topic_0118534003_p3930145118194">Direction</p>
</th>
@ -57,7 +57,7 @@
</div>
<div class="section" id="EN-US_TOPIC_0030828257__section9843135016217"><h4 class="sectiontitle">Network QoS</h4><p id="EN-US_TOPIC_0030828257__p2719863452">Network QoS uses basic technologies to improve the quality of network communication. A network with QoS enabled offers predictable network performance and effectively allocates network bandwidth to use network resources.</p>
<p id="EN-US_TOPIC_0030828257__p177731525134614">To obtain the QoS data of an ECS flavor, including the maximum bandwidth, assured bandwidth, maximum packets per second (PPS), and NIC multi-queue, see <a href="en-us_topic_0177512565.html">A Summary List of ECS Specifications</a>.</p>
<div class="p" id="EN-US_TOPIC_0030828257__p835110576352">The intranet bandwidth and PPS of an ECS are determined by its flavor.<ul id="EN-US_TOPIC_0030828257__ul123521357113516"><li id="EN-US_TOPIC_0030828257__li17352957153514">Assured intranet bandwidth: indicates the guaranteed bandwidth allocated to an ECS.</li><li id="EN-US_TOPIC_0030828257__li20352457113514">Maximum intranet bandwidth: indicates the maximum bandwidth that can be allocated to an ECS.</li><li id="EN-US_TOPIC_0030828257__li2352195783519">Maximum intranet PPS: indicates the maximum ECS capability in transmitting and receiving packets.</li><li id="EN-US_TOPIC_0030828257__li192851238163616">NIC multi-queue: allocates NIC interrupt requests to multiple vCPUs for higher PPS performance and bandwidth.<div class="note" id="EN-US_TOPIC_0030828257__note187491138374"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0030828257__ul1274915137378"><li id="EN-US_TOPIC_0030828257__li6749121316378">For instructions about how to test PPS, see <a href="en-us_topic_0115820205.html">How Can I Test Network Performance?</a></li><li id="EN-US_TOPIC_0030828257__li18749413163714">For instructions about how to enable NIC multi-queue, see <a href="en-us_topic_0058758453.html">Enabling NIC Multi-Queue</a>.</li></ul>
<div class="p" id="EN-US_TOPIC_0030828257__p835110576352">The intranet bandwidth and PPS of an ECS are determined by its flavor.<ul id="EN-US_TOPIC_0030828257__ul123521357113516"><li id="EN-US_TOPIC_0030828257__li17352957153514">Assured intranet bandwidth: indicates the guaranteed bandwidth allocated to an ECS.</li><li id="EN-US_TOPIC_0030828257__li20352457113514">Maximum intranet bandwidth: indicates the maximum bandwidth that can be allocated to an ECS.</li><li id="EN-US_TOPIC_0030828257__li2352195783519">Maximum intranet PPS: indicates the maximum ECS capability in transmitting and receiving packets.</li><li id="EN-US_TOPIC_0030828257__li192851238163616">NIC multi-queue: allocates NIC interrupt requests to multiple vCPUs for higher PPS performance and bandwidth.<div class="note" id="EN-US_TOPIC_0030828257__note187491138374"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0030828257__ul1274915137378"><li id="EN-US_TOPIC_0030828257__li6749121316378">For instructions about how to test PPS, see <a href="en-us_topic_0115820205.html">How Can I Test the Network Performance of Linux ECSs?</a></li><li id="EN-US_TOPIC_0030828257__li18749413163714">For instructions about how to enable NIC multi-queue, see <a href="en-us_topic_0058758453.html">Enabling NIC Multi-Queue</a>.</li></ul>
</div></div>
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<div id="body8662426"></div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="en-us_topic_0013771089.html">Login Overview</a></strong><br>
<li class="ulchildlink"><strong><a href="en-us_topic_0013771089.html">Login Overview (Linux)</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0093263550.html">Remotely Logging In to a Linux ECS (Using VNC)</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0017955380.html">Remotely Logging In to a Linux ECS (Using an SSH Key Pair)</a></strong><br>
<li class="ulchildlink"><strong><a href="en-us_topic_0017955380.html">Logging In to a Linux ECS Using an SSH Key Pair</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0017955633.html">Remotely Logging In to a Linux ECS (Using an SSH Password)</a></strong><br>
<li class="ulchildlink"><strong><a href="en-us_topic_0017955633.html">Logging In to a Linux ECS Using an SSH Password</a></strong><br>
</li>
</ul>

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<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="en-us_topic_0092494943.html">Login Overview</a></strong><br>
<li class="ulchildlink"><strong><a href="en-us_topic_0092494943.html">Login Overview (Windows)</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0027268511.html">Remotely Logging In to a Windows ECS (Using VNC)</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0017955381.html">Remotely Logging In to a Windows ECS (Using MSTSC)</a></strong><br>
<li class="ulchildlink"><strong><a href="en-us_topic_0017955381.html">Logging In to a Windows ECS Using MSTSC</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0275383051.html">Remotely Logging In to a Windows ECS (from a Linux Computer)</a></strong><br>
<li class="ulchildlink"><strong><a href="en-us_topic_0275383051.html">Logging In to a Windows ECS from a Linux Computer</a></strong><br>
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</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0060610074.html">Exporting ECS Information</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0000001630328828.html">Searching for ECSs</a></strong><br>
</li>
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<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>. 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__text18984195862115">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__b1967518220919"><span id="EN-US_TOPIC_0031107266__text7675132211912">Computing</span></strong>, click <strong id="EN-US_TOPIC_0031107266__b176754221695">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__b194135119">Operation</strong> column, click <strong id="EN-US_TOPIC_0031107266__b514283585">More</strong> and select <strong id="EN-US_TOPIC_0031107266__b1574177023">Get Password</strong>.<div class="fignone" id="EN-US_TOPIC_0031107266__fig1599613332547"><span class="figcap"><b>Figure 1 </b>Get Password</span><br><span><img id="EN-US_TOPIC_0031107266__image4997833195414" src="en-us_image_0000001659531420.png" title="Click to enlarge" class="imgResize"></span></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__b1967518220919"><span id="EN-US_TOPIC_0031107266__text7675132211912">Computing</span></strong>, click <strong id="EN-US_TOPIC_0031107266__b176754221695">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__b2003400776">Operation</strong> column, click <strong id="EN-US_TOPIC_0031107266__b333700778">More</strong> and select <strong id="EN-US_TOPIC_0031107266__b866465906">Get Password</strong>.<div class="fignone" id="EN-US_TOPIC_0031107266__fig1599613332547"><span class="figcap"><b>Figure 1 </b>Get Password</span><br><span><img id="EN-US_TOPIC_0031107266__image4997833195414" src="en-us_image_0000001659531420.png" title="Click to enlarge" class="imgResize"></span></div>
</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 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>
<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">project_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 details, see <a href="https://docs.otc.t-systems.com/elastic-cloud-server/api-ref/native_openstack_nova_apis/key_and_password_management/obtaining_the_password_for_logging_in_to_an_ecs.html#en-us-topic-0031176553" target="_blank" rel="noopener noreferrer">Obtaining the Password for Logging In to an ECS</a>.</p>
</div></div>
</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>
<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 <em id="EN-US_TOPIC_0031107266__i12113557112618">rsa_pem.key</em> -out <em id="EN-US_TOPIC_0031107266__i1869141019274">pkcs8_der.key</em> -nocrypt</strong></p>
</li><li id="EN-US_TOPIC_0031107266__li50037454154235">Invoke the Java class library <strong id="EN-US_TOPIC_0031107266__b842352706165810">org.bouncycastle.jce.provider.BouncyCastleProvider</strong> and use the key file to edit the code decryption ciphertext.</li></ol>
</li></ol>
</div>

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@ -7,7 +7,7 @@
</div>
<div class="section" id="EN-US_TOPIC_0031523135__section21723173114530"><h4 class="sectiontitle">Constraints</h4><ul id="EN-US_TOPIC_0031523135__ul66848156141149"><li id="EN-US_TOPIC_0031523135__li68038492239">The OS change takes about 10 to 20 minutes During this process, the <span id="EN-US_TOPIC_0031523135__text1821124103312">ECS</span> status is <strong id="EN-US_TOPIC_0031523135__b128242473318">Changing OS</strong>.</li><li id="EN-US_TOPIC_0031523135__li8803184922312">Do not perform any operations on the ECS before the system injects the password or key. Otherwise, the login will fail.</li><li id="EN-US_TOPIC_0031523135__li31738699195952">The ECS for which you want to change the OS must be in any of the following states: <strong id="EN-US_TOPIC_0031523135__b13748192124615">Stopped</strong>, <strong id="EN-US_TOPIC_0031523135__b165388615466">Reinstallation failed</strong>, or <strong id="EN-US_TOPIC_0031523135__b9101511124619">Failed to change the OS</strong>.</li><li id="EN-US_TOPIC_0031523135__li4397542520019">The target <span id="EN-US_TOPIC_0031523135__text49488517246">ECS</span> must have a system disk attached.</li><li id="EN-US_TOPIC_0031523135__li61491838141054">The EVS disk quota must be greater than 0.</li><li id="EN-US_TOPIC_0031523135__li799454911582">The system disk type cannot be changed.</li><li id="EN-US_TOPIC_0031523135__li3375642181010">The system disk can be encrypted.</li><li id="EN-US_TOPIC_0031523135__li15800141283111">For details about the change between different OSs, see <a href="#EN-US_TOPIC_0031523135__section1852122261012">Notes on Change Between Windows and Linux</a>.</li><li id="EN-US_TOPIC_0031523135__li5399152414277">If an ECS OS is to be changed using a full-ECS image, the ECS system disk can be encrypted.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0031523135__section34193483165818"><h4 class="sectiontitle">Notes</h4><ul id="EN-US_TOPIC_0031523135__ul57938298174117"><li id="EN-US_TOPIC_0031523135__li4523794174117">After the OS is changed, the original OS is not retained, and the original system disk is deleted, including the data in all partitions of the system disk.</li><li id="EN-US_TOPIC_0031523135__li11628132425511">Back up data before changing the OS. </li><li id="EN-US_TOPIC_0031523135__li15142465169">Changing the OS does not affect data in data disks.</li><li id="EN-US_TOPIC_0031523135__li4111648121710">After the OS is changed, your service running environment must be deployed in the new OS again.</li><li id="EN-US_TOPIC_0031523135__li20928142617465">After the OS is changed, the <span id="EN-US_TOPIC_0031523135__text1482784142414">ECS</span> will be automatically started.</li><li id="EN-US_TOPIC_0031523135__li12911023610">After the OS is changed, the system disk type of the ECS cannot be changed.</li><li id="EN-US_TOPIC_0031523135__li3784113720411">After the OS is changed, the IP and MAC addresses of the <span id="EN-US_TOPIC_0031523135__text116191542192414">ECS</span> remain unchanged.</li><li id="EN-US_TOPIC_0031523135__li1996774354616">After the OS is changed, customized configurations, such as DNS and hostname of the original OS will be reset and require reconfiguration.</li><li id="EN-US_TOPIC_0031523135__li153642091262">It takes about 10 to 20 minutes to change the OS. During this process, the <span id="EN-US_TOPIC_0031523135__text84597433244">ECS</span> is in <strong id="EN-US_TOPIC_0031523135__b1965965515210">Changing OS</strong> state.</li><li id="EN-US_TOPIC_0031523135__li439952411274">After the OS is changed, the password for logging in to the ECS is reset. To retrieve the password, perform the following operations:<ul id="EN-US_TOPIC_0031523135__ul1739982472717"><li id="EN-US_TOPIC_0031523135__li1939952412713">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">Remotely Logging In to a Linux ECS (Using an SSH Key Pair)</a>.</li><li id="EN-US_TOPIC_0031523135__li73991224142715">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>
<div class="section" id="EN-US_TOPIC_0031523135__section34193483165818"><h4 class="sectiontitle">Notes</h4><ul id="EN-US_TOPIC_0031523135__ul57938298174117"><li id="EN-US_TOPIC_0031523135__li4523794174117">After the OS is changed, the original OS is not retained, and the original system disk is deleted, including the data in all partitions of the system disk.</li><li id="EN-US_TOPIC_0031523135__li11628132425511">Back up data before changing the OS. </li><li id="EN-US_TOPIC_0031523135__li15142465169">Changing the OS does not affect data in data disks.</li><li id="EN-US_TOPIC_0031523135__li4111648121710">After the OS is changed, your service running environment must be deployed in the new OS again.</li><li id="EN-US_TOPIC_0031523135__li20928142617465">After the OS is changed, the <span id="EN-US_TOPIC_0031523135__text1482784142414">ECS</span> will be automatically started.</li><li id="EN-US_TOPIC_0031523135__li12911023610">After the OS is changed, the system disk type of the ECS cannot be changed.</li><li id="EN-US_TOPIC_0031523135__li3784113720411">After the OS is changed, the IP and MAC addresses of the <span id="EN-US_TOPIC_0031523135__text116191542192414">ECS</span> remain unchanged.</li><li id="EN-US_TOPIC_0031523135__li1996774354616">After the OS is changed, customized configurations, such as DNS and hostname of the original OS will be reset and require reconfiguration.</li><li id="EN-US_TOPIC_0031523135__li153642091262">It takes about 10 to 20 minutes to change the OS. During this process, the <span id="EN-US_TOPIC_0031523135__text84597433244">ECS</span> is in <strong id="EN-US_TOPIC_0031523135__b1965965515210">Changing OS</strong> state.</li><li id="EN-US_TOPIC_0031523135__li439952411274">After the OS is changed, the password for logging in to the ECS is reset. To retrieve the password, perform the following operations:<ul id="EN-US_TOPIC_0031523135__ul1739982472717"><li id="EN-US_TOPIC_0031523135__li1939952412713">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">Logging In to a Linux ECS Using an SSH Key Pair</a>.</li><li id="EN-US_TOPIC_0031523135__li73991224142715">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></ul>
<ul id="EN-US_TOPIC_0031523135__ul18707673284"><li id="EN-US_TOPIC_0031523135__li10954135083316">The system disk capacity of an <span id="EN-US_TOPIC_0031523135__text109953488248">ECS</span> with OS changed may change because the system disk capacity specified by the image of the changed OS may be changed.</li><li id="EN-US_TOPIC_0031523135__li14700191710294">You can choose to encrypt the system disk of an ECS during OS change.</li></ul>
</div>
@ -21,7 +21,7 @@
</li><li id="EN-US_TOPIC_0031523135__li19425937143519">If you plan to use a private image to change the OS, ensure that a private image is available. For details about how to create a private image, see <em id="EN-US_TOPIC_0031523135__i26643581348">Image Management Service User Guide</em>.<ul id="EN-US_TOPIC_0031523135__ul16160101111503"><li id="EN-US_TOPIC_0031523135__li112128495415">If the image of a specified <span id="EN-US_TOPIC_0031523135__text98820428488">ECS</span> is required, make sure that a private image has been created using this <span id="EN-US_TOPIC_0031523135__text9883742124815">ECS</span>.</li><li id="EN-US_TOPIC_0031523135__li19120046204513">If a local image file is required, make sure that the image file has been imported to the cloud platform and registered as a private image.</li><li id="EN-US_TOPIC_0031523135__li1838258174613">If a private image from another region is required, make sure that the image has been copied.</li><li id="EN-US_TOPIC_0031523135__li19484544194814">If a private image from another user account is required, make sure that the image has been shared with you.</li></ul>
</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0031523135__section208284422018"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0031523135__ol6031768220119"><li id="EN-US_TOPIC_0031523135__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0031523135__li464234814566">Click <span><img id="EN-US_TOPIC_0031523135__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_0031523135__en-us_topic_0031523135_en-us_topic_0024911405_li45082966143628"><a name="EN-US_TOPIC_0031523135__en-us_topic_0031523135_en-us_topic_0024911405_li45082966143628"></a><a name="en-us_topic_0031523135_en-us_topic_0024911405_li45082966143628"></a>Under <strong id="EN-US_TOPIC_0031523135__b64771213113612"><span id="EN-US_TOPIC_0031523135__text947741323619">Computing</span></strong>, choose <strong id="EN-US_TOPIC_0031523135__b1747761373620">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0031523135__li175115191038">Locate the row containing the target ECS and choose <strong id="EN-US_TOPIC_0031523135__b253915344810">More</strong> &gt; <strong id="EN-US_TOPIC_0031523135__b95405536485">Manage Image/Backup</strong> &gt; <strong id="EN-US_TOPIC_0031523135__b3540253154820">Change OS</strong> in the <strong id="EN-US_TOPIC_0031523135__b6540165314484">Operation</strong> column.<p id="EN-US_TOPIC_0031523135__p115219191436">Only stopped <span id="EN-US_TOPIC_0031523135__text39717298496">ECS</span>s support OS change. If the <span id="EN-US_TOPIC_0031523135__text54189033">ECS</span> is not stopped, stop it before proceeding with changing.</p>
<div class="section" id="EN-US_TOPIC_0031523135__section208284422018"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0031523135__ol6031768220119"><li id="EN-US_TOPIC_0031523135__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0031523135__li464234814566">Click <span><img id="EN-US_TOPIC_0031523135__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_0031523135__en-us_topic_0031523135_en-us_topic_0024911405_li45082966143628"><a name="EN-US_TOPIC_0031523135__en-us_topic_0031523135_en-us_topic_0024911405_li45082966143628"></a><a name="en-us_topic_0031523135_en-us_topic_0024911405_li45082966143628"></a>Under <strong id="EN-US_TOPIC_0031523135__b64771213113612"><span id="EN-US_TOPIC_0031523135__text947741323619">Computing</span></strong>, choose <strong id="EN-US_TOPIC_0031523135__b1747761373620">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0031523135__li175115191038">Locate the row containing the target ECS and choose <strong id="EN-US_TOPIC_0031523135__b253915344810">More</strong> &gt; <strong id="EN-US_TOPIC_0031523135__b95405536485">Manage Image/Backup</strong> &gt; <strong id="EN-US_TOPIC_0031523135__b3540253154820">Change OS</strong> in the <strong id="EN-US_TOPIC_0031523135__b6540165314484">Operation</strong> column.<p id="EN-US_TOPIC_0031523135__p115219191436">Only stopped <span id="EN-US_TOPIC_0031523135__text39717298496">ECS</span>s support OS change. If the <span id="EN-US_TOPIC_0031523135__text738360769">ECS</span> is not stopped, stop it before proceeding with changing.</p>
</li><li id="EN-US_TOPIC_0031523135__li359341520111">Select the target image.<p id="EN-US_TOPIC_0031523135__p4891784120112"><a name="EN-US_TOPIC_0031523135__li359341520111"></a><a name="li359341520111"></a>For more details, see <a href="en-us_topic_0021831611.html">Creating an ECS</a>.</p>
<div class="fignone" id="EN-US_TOPIC_0031523135__fig61751138286"><span class="figcap"><b>Figure 1 </b>OS Change</span><br><span><img id="EN-US_TOPIC_0031523135__image1017617388811" src="en-us_image_0000001658474496.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0031523135__li8531832155310">(Optional) Select the <strong id="EN-US_TOPIC_0031523135__b1408122218304">Encryption</strong> option to encrypt the system disk during OS change.<p id="EN-US_TOPIC_0031523135__p767712438280">To enable encryption, click <span class="uicontrol" id="EN-US_TOPIC_0031523135__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 details, see <a href="en-us_topic_0047272493.html">Can All Users Use the Encryption Feature?</a></p>
@ -30,7 +30,7 @@
</li><li id="EN-US_TOPIC_0031523135__li17273849113530">(Optional) Select a <strong id="EN-US_TOPIC_0031523135__b84235270615319">License Type</strong> (<strong id="EN-US_TOPIC_0031523135__b842352706153129">Use license from the system</strong> or <strong id="EN-US_TOPIC_0031523135__b842352706153134">Bring your own license (BYOL)</strong>) if the changed OS running on your ECS is billed. For more details, see <a href="en-us_topic_0046566932.html">License Types</a>.<div class="p" id="EN-US_TOPIC_0031523135__p57004530113530">The following OSs are billed:<ul id="EN-US_TOPIC_0031523135__ul43278730113530"><li id="EN-US_TOPIC_0031523135__en-us_topic_0046566932_li2586589022251">SUSE Linux Enterprise Server</li><li id="EN-US_TOPIC_0031523135__en-us_topic_0046566932_li6521605722253">Oracle Enterprise Linux</li><li id="EN-US_TOPIC_0031523135__en-us_topic_0046566932_li37000181205155">Red Hat Enterprise Linux</li></ul>
</div>
</li><li id="EN-US_TOPIC_0031523135__li5336143212240">Configure the login mode.<p id="EN-US_TOPIC_0031523135__p1154194111115"><a name="EN-US_TOPIC_0031523135__li5336143212240"></a><a name="li5336143212240"></a>If the target <span id="EN-US_TOPIC_0031523135__text1916311471252">ECS</span> uses key pair authentication, you can replace the original key pair.</p>
</li><li id="EN-US_TOPIC_0031523135__en-us_topic_0031523135_en-us_topic_0024911405_li4798821517833">Click <strong id="EN-US_TOPIC_0031523135__b153798544917">OK</strong>.</li><li id="EN-US_TOPIC_0031523135__en-us_topic_0031523135_en-us_topic_0024911405_li45992498111556"><a name="EN-US_TOPIC_0031523135__en-us_topic_0031523135_en-us_topic_0024911405_li45992498111556"></a><a name="en-us_topic_0031523135_en-us_topic_0024911405_li45992498111556"></a>On the <strong id="EN-US_TOPIC_0031523135__b157194117366">Change ECS OS</strong> page, confirm the specifications, and click <strong id="EN-US_TOPIC_0031523135__b11104413360">Submit</strong>.<p id="EN-US_TOPIC_0031523135__p4013850816820">After the application is submitted, the status <strong id="EN-US_TOPIC_0031523135__b84235270616717">Changing OS</strong> is displayed. When this status disappears, the OS change is complete.</p>
</li><li id="EN-US_TOPIC_0031523135__en-us_topic_0031523135_en-us_topic_0024911405_li4798821517833">Click <strong id="EN-US_TOPIC_0031523135__b153798544917">OK</strong>.</li><li id="EN-US_TOPIC_0031523135__en-us_topic_0031523135_en-us_topic_0024911405_li45992498111556"><a name="EN-US_TOPIC_0031523135__en-us_topic_0031523135_en-us_topic_0024911405_li45992498111556"></a><a name="en-us_topic_0031523135_en-us_topic_0024911405_li45992498111556"></a>In the <strong id="EN-US_TOPIC_0031523135__b157194117366">Change ECS OS</strong> dialog box, confirm the specifications, and click <strong id="EN-US_TOPIC_0031523135__b11104413360">Submit</strong>.<p id="EN-US_TOPIC_0031523135__p4013850816820">After the application is submitted, the status <strong id="EN-US_TOPIC_0031523135__b84235270616717">Changing OS</strong> is displayed. When this status disappears, the OS change is complete.</p>
<div class="note" id="EN-US_TOPIC_0031523135__note1993244016842"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0031523135__p3492635716815">A temporary <span id="EN-US_TOPIC_0031523135__text26231188142">ECS</span> is created during the OS change process. After the process is complete, this <span id="EN-US_TOPIC_0031523135__text1418210226147">ECS</span> will be automatically deleted.</p>
</div></div>
</li></ol>
@ -45,7 +45,7 @@
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0176502615.html">Managing ECSs</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0000001983533061.html">Reinstalling or Changing the OS</a></div>
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@ -71,7 +71,7 @@ echo "Hello, the time is now $(date -R)" | tee /root/output.txt</pre>
<p id="EN-US_TOPIC_0032380449__p316665544119">After the <span id="EN-US_TOPIC_0032380449__text1654745284317">ECS</span> is created, start it and run the <strong id="EN-US_TOPIC_0032380449__b741518589424">cat </strong><em id="EN-US_TOPIC_0032380449__i39973094314">[file]</em> command to check the script execution result.</p>
<pre class="screen" id="EN-US_TOPIC_0032380449__screen353671394316">[root@XXXXXXXX ~]# cat /root/output.txt
Hello, the time is now Mon, 16 Jul 2016 16:03:18+0800</pre>
<p id="EN-US_TOPIC_0032380449__p1849372719381"><strong id="EN-US_TOPIC_0032380449__b1650204422">Example 2: Inject a Cloud-Config data script.</strong></p>
<p id="EN-US_TOPIC_0032380449__p1849372719381"><strong id="EN-US_TOPIC_0032380449__b200073486">Example 2: Inject a Cloud-Config data script.</strong></p>
<p id="EN-US_TOPIC_0032380449__p104921296416">When creating an <span id="EN-US_TOPIC_0032380449__text231733611919">ECS</span>, set <strong id="EN-US_TOPIC_0032380449__b83221136111911">User Data</strong> to <strong id="EN-US_TOPIC_0032380449__b632319362193">As text</strong> and enter the customized user data script.</p>
<pre class="screen" id="EN-US_TOPIC_0032380449__screen188011505456">#cloud-config
bootcmd:
@ -233,7 +233,7 @@ runcmd:
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0140313879.html">Obtaining Metadata and Passing User Data</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0176502615.html">Managing ECSs</a></div>
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<p id="EN-US_TOPIC_0035470096__p177731525134614">To obtain the QoS data of an ECS flavor, including the maximum bandwidth, assured bandwidth, maximum intranet PPS, and NIC multi-queue, see <a href="en-us_topic_0177512565.html">A Summary List of ECS Specifications</a>.</p>
<div class="p" id="EN-US_TOPIC_0035470096__p835110576352">The intranet bandwidth and PPS of an ECS are determined by the ECS flavor.<ul id="EN-US_TOPIC_0035470096__ul123521357113516"><li id="EN-US_TOPIC_0035470096__li37913491485">Assured intranet bandwidth: indicates the guaranteed bandwidth allocated to an ECS when there is a network bandwidth contention in the entire network.</li><li id="EN-US_TOPIC_0035470096__li379249134818">Maximum intranet bandwidth: indicates the maximum bandwidth that can be allocated to an ECS when the ECS does not compete for network bandwidth (other ECSs on the host do not have high requirements on network bandwidth).</li><li id="EN-US_TOPIC_0035470096__li2352195783519">Maximum intranet PPS: indicates the maximum ECS capability in sending and receiving packets.<p id="EN-US_TOPIC_0035470096__p167561739502"><a name="EN-US_TOPIC_0035470096__li2352195783519"></a><a name="li2352195783519"></a>PPS: packets per second, indicates the number of packets sent per second. It is usually used to measure the network performance.</p>
</li><li id="EN-US_TOPIC_0035470096__li192851238163616">NIC multi-queues: allocates NIC interrupt requests to multiple vCPUs for higher PPS performance and bandwidth</li><li id="EN-US_TOPIC_0035470096__li839012814476">Maximum NICs: indicates the maximum number of NICs that can be attached to an ECS.</li><li id="EN-US_TOPIC_0035470096__li1444103915474">Maximum supplementary NICs: indicates the maximum number of supplementary NICs that can be attached to an <span id="EN-US_TOPIC_0035470096__text146199522473">ECS</span>.</li></ul>
<div class="note" id="EN-US_TOPIC_0035470096__note439042864715"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0035470096__ul1439014285471"><li id="EN-US_TOPIC_0035470096__li239011287472">For instructions about how to test PPS, see <a href="en-us_topic_0115820205.html">How Can I Test Network Performance?</a>.</li><li id="EN-US_TOPIC_0035470096__li17390182813478">For instructions about how to enable NIC multi-queue, see <a href="en-us_topic_0058758453.html">Enabling NIC Multi-Queue</a>.</li><li id="EN-US_TOPIC_0035470096__li6651911036">The maximum bandwidth is the total bandwidth allocated to an ECS. If an ECS has multiple NICs, the sum of the maximum bandwidths allocated to all NICs cannot exceed the maximum bandwidth allocated to the ECS.</li></ul>
<div class="note" id="EN-US_TOPIC_0035470096__note439042864715"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0035470096__ul1439014285471"><li id="EN-US_TOPIC_0035470096__li239011287472">For instructions about how to test PPS, see <a href="en-us_topic_0115820205.html">How Can I Test the Network Performance of Linux ECSs?</a>.</li><li id="EN-US_TOPIC_0035470096__li17390182813478">For instructions about how to enable NIC multi-queue, see <a href="en-us_topic_0058758453.html">Enabling NIC Multi-Queue</a>.</li><li id="EN-US_TOPIC_0035470096__li6651911036">The maximum bandwidth is the total bandwidth allocated to an ECS. If an ECS has multiple NICs, the sum of the maximum bandwidths allocated to all NICs cannot exceed the maximum bandwidth allocated to the ECS.</li></ul>
</div></div>
</div>
</div>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0271001300.html">Instances</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0271001300.html">ECS Types and Specifications</a></div>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0132345719.html">ECS Specifications and Types</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0132345719.html">ECS Specifications</a></div>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0132345719.html">ECS Specifications and Types</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0132345719.html">ECS Specifications</a></div>
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</tbody>
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</div>
</p></li><li id="EN-US_TOPIC_0036068717__li25214666174432"><span>Log in to the ECS.</span><p><p id="EN-US_TOPIC_0036068717__p17714710174432">For more details, see <a href="en-us_topic_0013771089.html">Login Overview</a>.</p>
</p></li><li id="EN-US_TOPIC_0036068717__li25214666174432"><span>Log in to the ECS.</span><p><p id="EN-US_TOPIC_0036068717__p17714710174432">For more details, see <a href="en-us_topic_0013771089.html">Login Overview (Linux)</a>.</p>
</p></li><li id="EN-US_TOPIC_0036068717__li60772019174432"><span id="EN-US_TOPIC_0036068717__p1085213201859">Install the passthrough NIC driver on the ECS. In this procedure, Red Hat Enterprise Linux 7.2 64bit is used as an example.</span><p><ol type="a" id="EN-US_TOPIC_0036068717__ol50819110174442"><li id="EN-US_TOPIC_0036068717__li54718812174442">Configure the passthrough NIC.<div class="p" id="EN-US_TOPIC_0036068717__p30042656175419"><a name="EN-US_TOPIC_0036068717__li54718812174442"></a><a name="li54718812174442"></a>Not all ECS OSs identify passthrough NICs using the standard NIC naming rule of <strong id="EN-US_TOPIC_0036068717__b4888194152611">eth</strong><em id="EN-US_TOPIC_0036068717__i788819410266">x</em>, where <em id="EN-US_TOPIC_0036068717__i58891341152614">x</em> is a number. If this is the case, you must configure the ECS so that it can identify the passthrough NIC. The procedure is as follows:<ol class="substepthirdol" id="EN-US_TOPIC_0036068717__ol35405014175415"><li id="EN-US_TOPIC_0036068717__li50209671175415">Run the following command to view all NICs on the ECS and identify the passthrough NIC:<p id="EN-US_TOPIC_0036068717__p21174591175532"><a name="EN-US_TOPIC_0036068717__li50209671175415"></a><a name="li50209671175415"></a><strong id="EN-US_TOPIC_0036068717__b11157447175530">ifconfig -a</strong></p>
</li><li id="EN-US_TOPIC_0036068717__li40451590175415">Run the following command to switch to the directory where configuration files are stored:<p id="EN-US_TOPIC_0036068717__p16412066175736"><a name="EN-US_TOPIC_0036068717__li40451590175415"></a><a name="li40451590175415"></a><strong id="EN-US_TOPIC_0036068717__b20057758175733">cd /etc/sysconfig/network-scripts/</strong></p>
</li><li id="EN-US_TOPIC_0036068717__li55353390175415">Run the following command to create a configuration file for the passthrough NIC:<p id="EN-US_TOPIC_0036068717__p5096763920343"><a name="EN-US_TOPIC_0036068717__li55353390175415"></a><a name="li55353390175415"></a><strong id="EN-US_TOPIC_0036068717__b3535160420355">cp ifcfg-eth0 ifcfg-</strong><em id="EN-US_TOPIC_0036068717__i5428923120355">NIC_name</em></p>

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</tbody>
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</div>
</li><li id="EN-US_TOPIC_0038024694__li36507823151326">An ECS can have a maximum of 60 attached disks, including the system disk. For details about constraints, see <a href="en-us_topic_0018073215.html">Can I Attach Multiple Disks to an ECS?</a><p id="EN-US_TOPIC_0038024694__p65958213151326">For example, an E3 ECS can have one system disk and 59 EVS disks.</p>
</li><li id="EN-US_TOPIC_0038024694__li36507823151326">An ECS can have a maximum of 60 attached disks, including the system disk. For details about constraints, see <a href="en-us_topic_0018073215.html">Can I Attach Multiple Disks to an ECS?</a><p id="EN-US_TOPIC_0038024694__p65958213151326">For example, an E3 ECS can have one system disk and 59 data disks.</p>
<div class="note" id="EN-US_TOPIC_0038024694__note54794089164745"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"></div></div>
</li></ul>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0132345719.html">ECS Specifications and Types</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0132345719.html">ECS Specifications</a></div>
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<div id="body1475916349625"><div class="section" id="EN-US_TOPIC_0039588795__section52267161284"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0039588795__p192271016152813">After submitting the request for creating an <span id="EN-US_TOPIC_0039588795__text67111012253">ECS</span>, you can view the creation status. This section describes how to view the creation status of an <span id="EN-US_TOPIC_0039588795__text174152252512">ECS</span>.</p>
</div>
<div class="section" id="EN-US_TOPIC_0039588795__section40936232171845"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0039588795__ol1607973117228"><li id="EN-US_TOPIC_0039588795__li3490190117228">Log in to the management console.</li><li id="EN-US_TOPIC_0039588795__li464234814566">Click <span><img id="EN-US_TOPIC_0039588795__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_0039588795__li1859019014179">Under <strong id="EN-US_TOPIC_0039588795__b1315112356312"><span id="EN-US_TOPIC_0039588795__text13151183518317">Computing</span></strong>, click <strong id="EN-US_TOPIC_0039588795__b1815216356318">Elastic Cloud Server</strong>.</li><li id="EN-US_TOPIC_0039588795__li8248795172237">After creating an ECS, view the creation status above the ECS list beside the common operations (<strong id="EN-US_TOPIC_0039588795__b842352706224353">Start</strong>, <strong id="EN-US_TOPIC_0039588795__b842352706224359">Stop</strong>, <strong id="EN-US_TOPIC_0039588795__b842352706224412">Restart</strong>, and <strong id="EN-US_TOPIC_0039588795__b1256162714514">Delete</strong>).<div class="fignone" id="EN-US_TOPIC_0039588795__fig95001618173416"><span class="figcap"><b>Figure 1 </b>ECS creation status</span><br><span><img id="EN-US_TOPIC_0039588795__image750151803413" src="en-us_image_0000001705420301.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0039588795__li5737160017537">Click the number displayed above <strong id="EN-US_TOPIC_0039588795__b842352706193120">Creating</strong> and view task details.<div class="note" id="EN-US_TOPIC_0039588795__note757395218525"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0039588795__ul8917181844517"><li id="EN-US_TOPIC_0039588795__li124091521144514">An ECS that is being created is in one of the following states:<ul id="EN-US_TOPIC_0039588795__ul71264208715"><li id="EN-US_TOPIC_0039588795__li1412652020718"><strong id="EN-US_TOPIC_0039588795__b842352706171726">Creating</strong>: The ECS is being created.</li><li id="EN-US_TOPIC_0039588795__li62730432364"><strong id="EN-US_TOPIC_0039588795__b1354557602">Faulty</strong>: Creating the ECS failed. In such a case, the system automatically rolls back the task and displays an error code on the GUI, for example, <strong id="EN-US_TOPIC_0039588795__b886218021">Ecs.0013 Insufficient EIP quota</strong>.</li><li id="EN-US_TOPIC_0039588795__li11517121613158"><strong id="EN-US_TOPIC_0039588795__b1882137987">Running</strong>: The request of creating the ECS has been processed, and the ECS is running properly. An ECS in this state can provide services for you.<p id="EN-US_TOPIC_0039588795__p15171216151514">See <a href="en-us_topic_0032398121.html">How Do I Handle Error Messages Displayed on the Management Console?</a> for troubleshooting.</p>
</li><li id="EN-US_TOPIC_0039588795__li5737160017537">Click the number displayed above <strong id="EN-US_TOPIC_0039588795__b842352706193120">Creating</strong> and view task details.<div class="note" id="EN-US_TOPIC_0039588795__note757395218525"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0039588795__ul8917181844517"><li id="EN-US_TOPIC_0039588795__li124091521144514">An ECS that is being created is in one of the following states:<ul id="EN-US_TOPIC_0039588795__ul71264208715"><li id="EN-US_TOPIC_0039588795__li1412652020718"><strong id="EN-US_TOPIC_0039588795__b842352706171726">Creating</strong>: The ECS is being created.</li><li id="EN-US_TOPIC_0039588795__li62730432364"><strong id="EN-US_TOPIC_0039588795__b1030361551">Faulty</strong>: Creating the ECS failed. In such a case, the system automatically rolls back the task and displays an error code on the GUI, for example, <strong id="EN-US_TOPIC_0039588795__b1151010909">Ecs.0013 Insufficient EIP quota</strong>.</li><li id="EN-US_TOPIC_0039588795__li11517121613158"><strong id="EN-US_TOPIC_0039588795__b434947765">Running</strong>: The request of creating the ECS has been processed, and the ECS is running properly. An ECS in this state can provide services for you.<p id="EN-US_TOPIC_0039588795__p15171216151514">See <a href="en-us_topic_0032398121.html">How Do I Handle Error Messages Displayed on the Management Console?</a> for troubleshooting.</p>
</li></ul>
</li><li id="EN-US_TOPIC_0039588795__li16917201819452">If you find that the task status area shows an ECS creation failure but the ECS has been created successfully and displayed in the ECS list, see <a href="en-us_topic_0039524582.html">Why Does the Failures Area Show an ECS Creation Failure But the ECS List Displays the Created ECS?</a></li></ul>
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</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0041169567__row4686203144913"><td class="cellrowborder" valign="top" width="18.970000000000002%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0041169567__p19687143164918">2024-05-11</p>
<tbody><tr id="EN-US_TOPIC_0041169567__row1188718585452"><td class="cellrowborder" valign="top" width="18.970000000000002%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0041169567__p188881658144511">2024-07-23</p>
</td>
<td class="cellrowborder" valign="top" width="81.03%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0041169567__p1888818586459">Modified the following content:</p>
<p id="EN-US_TOPIC_0041169567__p20415172014611">Added cloud backup parameters in <a href="en-us_topic_0163572591.html">Step 3: Configure Advanced Settings</a>.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0041169567__row4686203144913"><td class="cellrowborder" valign="top" width="18.970000000000002%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0041169567__p19687143164918">2024-05-11</p>
</td>
<td class="cellrowborder" valign="top" width="81.03%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0041169567__p5249175315507">Modified the following content:</p>
<p id="EN-US_TOPIC_0041169567__p43721659105010">Terminated M2 ECSs in <a href="en-us_topic_0035550301.html">Memory-optimized ECSs</a>.</p>
@ -138,7 +144,7 @@
<tr id="EN-US_TOPIC_0041169567__row10388742599"><td class="cellrowborder" valign="top" width="18.970000000000002%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0041169567__p103891485913">2022-04-02</p>
</td>
<td class="cellrowborder" valign="top" width="81.03%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0041169567__p11389194145916">Modified the following content:</p>
<p id="EN-US_TOPIC_0041169567__p1785981414597">Added the OSs supported by ECSs in <a href="en-us_topic_0132345719.html">ECS Specifications and Types</a>.</p>
<p id="EN-US_TOPIC_0041169567__p1785981414597">Added the OSs supported by ECSs in <a href="en-us_topic_0132345719.html">ECS Specifications</a>.</p>
</td>
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<tr id="EN-US_TOPIC_0041169567__row191141028165010"><td class="cellrowborder" valign="top" width="18.970000000000002%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0041169567__p6115628105015">2022-03-11</p>
@ -409,7 +415,7 @@
<tr id="EN-US_TOPIC_0041169567__row25416456109"><td class="cellrowborder" valign="top" width="18.970000000000002%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0041169567__p154124510103">2018-07-01</p>
</td>
<td class="cellrowborder" valign="top" width="81.03%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0041169567__p19541845111015">Added the following content:</p>
<ul id="EN-US_TOPIC_0041169567__ul166115173512"><li id="EN-US_TOPIC_0041169567__li19516158152118"><a href="en-us_topic_0116266206.html">CTS</a></li><li id="EN-US_TOPIC_0041169567__li08285113511"><a href="en-us_topic_0115820205.html">How Can I Test Network Performance?</a></li><li id="EN-US_TOPIC_0041169567__li598651143516"><a href="en-us_topic_0018339851.html">Why Does an Authentication Failure Occurs After I Attempt to Remotely Log In to a Windows ECS?</a></li></ul>
<ul id="EN-US_TOPIC_0041169567__ul166115173512"><li id="EN-US_TOPIC_0041169567__li19516158152118"><a href="en-us_topic_0116266206.html">CTS</a></li><li id="EN-US_TOPIC_0041169567__li08285113511"><a href="en-us_topic_0115820205.html">How Can I Test the Network Performance of Linux ECSs?</a></li><li id="EN-US_TOPIC_0041169567__li598651143516"><a href="en-us_topic_0018339851.html">Why Does an Authentication Failure Occurs After I Attempt to Remotely Log In to a Windows ECS?</a></li></ul>
<p id="EN-US_TOPIC_0041169567__p18656439192111">Modified the following content:</p>
<ul id="EN-US_TOPIC_0041169567__ul520711514352"><li id="EN-US_TOPIC_0041169567__li220720514351">Allowed to export certain ECSs in <a href="en-us_topic_0060610074.html">Exporting ECS Information</a>.</li><li id="EN-US_TOPIC_0041169567__li726845116355">Modified prerequisites in <a href="en-us_topic_0031523135.html">Changing the OS</a>, allowing you to change the OS of an ECS on which reinstalling the OS failed.</li><li id="EN-US_TOPIC_0041169567__li102833065520">Modified description in <a href="en-us_topic_0093492517.html">Changing a Security Group</a>, allowing you to change the security group in the <strong id="EN-US_TOPIC_0041169567__b842352706171755">Operation</strong> column.</li></ul>
</td>
@ -532,7 +538,7 @@
<tr id="EN-US_TOPIC_0041169567__row8254132413320"><td class="cellrowborder" valign="top" width="18.970000000000002%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0041169567__p22545248311">2017-09-06</p>
</td>
<td class="cellrowborder" valign="top" width="81.03%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0041169567__p2935113713317">Modified the following content:</p>
<ul id="EN-US_TOPIC_0041169567__ul45605086223143"><li id="EN-US_TOPIC_0041169567__li40903694223143">Modified key description and added an image for the encryption process in <a href="en-us_topic_0046912051.html">User Encryption</a>.</li><li id="EN-US_TOPIC_0041169567__li79713417420">Added the official website for downloading TightVNC in <a href="en-us_topic_0013771089.html">Login Overview</a>.</li><li id="EN-US_TOPIC_0041169567__li23882168223328">Added examples for configuring routing policies in <a href="en-us_topic_0018073216.html">Can Multiple EIPs Be Bound to an ECS?</a></li><li id="EN-US_TOPIC_0041169567__li60569117223551">Added description in <a href="en-us_topic_0025445670.html">Will NICs Added to an ECS Start Automatically?</a>, indicating that only the NICs added to an ECS running the CentOS 7.0 OS requires manual activation.</li><li id="EN-US_TOPIC_0041169567__li7899138191110"><a href="en-us_topic_0030932496.html">What Should I Do If I Cannot Use the German Keyboard to Enter Characters When I Log In to a Linux ECS Using VNC?</a></li></ul>
<ul id="EN-US_TOPIC_0041169567__ul45605086223143"><li id="EN-US_TOPIC_0041169567__li40903694223143">Modified key description and added an image for the encryption process in <a href="en-us_topic_0046912051.html">User Encryption</a>.</li><li id="EN-US_TOPIC_0041169567__li79713417420">Added the official website for downloading TightVNC in <a href="en-us_topic_0013771089.html">Login Overview (Linux)</a>.</li><li id="EN-US_TOPIC_0041169567__li23882168223328">Added examples for configuring routing policies in <a href="en-us_topic_0018073216.html">Can Multiple EIPs Be Bound to an ECS?</a></li><li id="EN-US_TOPIC_0041169567__li60569117223551">Added description in <a href="en-us_topic_0025445670.html">Will NICs Added to an ECS Start Automatically?</a>, indicating that only the NICs added to an ECS running the CentOS 7.0 OS requires manual activation.</li><li id="EN-US_TOPIC_0041169567__li7899138191110"><a href="en-us_topic_0030932496.html">What Should I Do If I Cannot Use the German Keyboard to Enter Characters When I Log In to a Linux ECS Using VNC?</a></li></ul>
</td>
</tr>
<tr id="EN-US_TOPIC_0041169567__row13687142491115"><td class="cellrowborder" valign="top" width="18.970000000000002%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0041169567__p1268712412117">2017-08-22</p>
@ -635,7 +641,7 @@
<td class="cellrowborder" valign="top" width="81.03%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0041169567__p8519185714317">Added the following content:</p>
<ul id="EN-US_TOPIC_0041169567__ul530951486"><li id="EN-US_TOPIC_0041169567__li1393416104415"><a href="en-us_topic_0032980085.html">Managing ECS Groups</a></li><li id="EN-US_TOPIC_0041169567__li139342144418"><a href="en-us_topic_0039588795.html">Viewing ECS Creation Statuses</a></li><li id="EN-US_TOPIC_0041169567__li1493414134413"><a href="en-us_topic_0039524582.html">Why Does the Failures Area Show an ECS Creation Failure But the ECS List Displays the Created ECS?</a></li></ul>
<p id="EN-US_TOPIC_0041169567__p13887111124417">Modified the following content:</p>
<ul id="EN-US_TOPIC_0041169567__ul39346112441"><li id="EN-US_TOPIC_0041169567__li182219174912">Added information for remotely logging in to ECSs in <a href="en-us_topic_0027268511.html">Remotely Logging In to a Windows ECS (Using VNC)</a>, <a href="en-us_topic_0017955380.html">Remotely Logging In to a Linux ECS (Using an SSH Key Pair)</a>, <a href="en-us_topic_0017955633.html">Remotely Logging In to a Linux ECS (Using an SSH Password)</a>, and <a href="en-us_topic_0017955381.html">Remotely Logging In to a Windows ECS (Using MSTSC)</a>.</li><li id="EN-US_TOPIC_0041169567__li1793471174413">Added document links to the default keyboard types of the ECSs created using public images in <a href="en-us_topic_0027268511.html">Remotely Logging In to a Windows ECS (Using VNC)</a>.</li><li id="EN-US_TOPIC_0041169567__li13934171164410">Added notes on keyboard language settings for VNC-based ECS logins and the mapping between four types of keyboards in <a href="en-us_topic_0027268511.html">Remotely Logging In to a Windows ECS (Using VNC)</a>. Provided configuration examples and links to related FAQs.</li></ul>
<ul id="EN-US_TOPIC_0041169567__ul39346112441"><li id="EN-US_TOPIC_0041169567__li182219174912">Added information for remotely logging in to ECSs in <a href="en-us_topic_0027268511.html">Remotely Logging In to a Windows ECS (Using VNC)</a>, <a href="en-us_topic_0017955380.html">Logging In to a Linux ECS Using an SSH Key Pair</a>, <a href="en-us_topic_0017955633.html">Logging In to a Linux ECS Using an SSH Password</a>, and <a href="en-us_topic_0017955381.html">Logging In to a Windows ECS Using MSTSC</a>.</li><li id="EN-US_TOPIC_0041169567__li1793471174413">Added document links to the default keyboard types of the ECSs created using public images in <a href="en-us_topic_0027268511.html">Remotely Logging In to a Windows ECS (Using VNC)</a>.</li><li id="EN-US_TOPIC_0041169567__li13934171164410">Added notes on keyboard language settings for VNC-based ECS logins and the mapping between four types of keyboards in <a href="en-us_topic_0027268511.html">Remotely Logging In to a Windows ECS (Using VNC)</a>. Provided configuration examples and links to related FAQs.</li></ul>
</td>
</tr>
<tr id="EN-US_TOPIC_0041169567__row1097572261717"><td class="cellrowborder" valign="top" width="18.970000000000002%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0041169567__p1797522215173">2016-09-30</p>

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<td class="cellrowborder" valign="top" width="24%" headers="mcps1.3.3.3.2.4.1.2 "><p id="EN-US_TOPIC_0042400609__p714571205111">/securitykey</p>
</td>
<td class="cellrowborder" valign="top" width="54%" headers="mcps1.3.3.3.2.4.1.3 "><p id="EN-US_TOPIC_0042400609__p17145915518">Obtains temporary AKs and SKs.</p>
<p id="EN-US_TOPIC_0042400609__p11608355141017">Before enabling an <span id="EN-US_TOPIC_0042400609__text7729652145914">ECS</span> to obtain a temporary AK and SK, make sure that the <strong id="EN-US_TOPIC_0042400609__b872995225911">op_svc_ecs</strong> account has been authorized on IAM and that the desired <span id="EN-US_TOPIC_0042400609__text10731852185910">ECS</span> resources have been authorized for management.</p>
<p id="EN-US_TOPIC_0042400609__p11608355141017">Before enabling an <span id="EN-US_TOPIC_0042400609__text6889416133713">ECS</span> to obtain a temporary AK and SK, authorize agency permissions to the <strong id="EN-US_TOPIC_0042400609__b8889716123716">op_svc_ecs</strong> account and ECSs in IAM.</p>
<div class="note" id="EN-US_TOPIC_0042400609__note6961737132312"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="EN-US_TOPIC_0042400609__p179619371238">You can determine what permissions are granted to the agency based on the principal of least privilege (PoLP).</p>
<p id="EN-US_TOPIC_0042400609__p15538829112612">ECSs will not use agencies to perform operations on resources.</p>
</div></div>
</td>
</tr>
<tr id="EN-US_TOPIC_0042400609__row16772135161746"><td class="cellrowborder" valign="top" width="22%" headers="mcps1.3.3.3.2.4.1.1 "><p id="EN-US_TOPIC_0042400609__p4373564516822">EC2-compatible</p>
@ -359,7 +362,7 @@
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0140313879.html">Obtaining Metadata and Passing User Data</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0176502615.html">Managing ECSs</a></div>
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<div id="body1487147188799"><p id="EN-US_TOPIC_0048642616__p24907765162841">Cloud-Init is an open-source cloud initialization program, which initializes some of the customized configurations of a newly created <span id="EN-US_TOPIC_0048642616__text169521139133911">ECS</span>, such as the hostname, key pair, and user data.</p>
<p id="EN-US_TOPIC_0048642616__p28807954171256">All standard (Standard_xxx) and enterprise (Enterprise_xxx) images support Cloud-Init. Only certain community images (Community_xxx) do not support it.</p>
<p id="EN-US_TOPIC_0048642616__p61388894444">Using Cloud-Init to initialize your <span id="EN-US_TOPIC_0048642616__text995012410423">ECS</span>s will affect your <span id="EN-US_TOPIC_0048642616__text823920531281">ECS</span>, IMS, and AS services.</p>
<div class="section" id="EN-US_TOPIC_0048642616__section1150469610136"><h4 class="sectiontitle">Impact on IMS</h4><div class="p" id="EN-US_TOPIC_0048642616__p19778043173734">To ensure that <span id="EN-US_TOPIC_0048642616__text988919911421">ECS</span>s created using a private image support custom configurations, you must install Cloud-Init or Cloudbase-Init on the <span id="EN-US_TOPIC_0048642616__text2526249418">ECS</span>s before using them to create private images.<ul id="EN-US_TOPIC_0048642616__ul46952306173918"><li id="EN-US_TOPIC_0048642616__li36111246173918">For Windows OSs, download and install Cloudbase-Init.</li><li id="EN-US_TOPIC_0048642616__li31598379173918">For Linux OSs, download and install Cloud-Init.</li></ul>
<div class="section" id="EN-US_TOPIC_0048642616__section1150469610136"><h4 class="sectiontitle">Impact on IMS</h4><div class="p" id="EN-US_TOPIC_0048642616__p19778043173734">To ensure that <span id="EN-US_TOPIC_0048642616__text988919911421">ECS</span>s that are created using a private image support custom configurations, you must install Cloud-Init or Cloudbase-Init on the <span id="EN-US_TOPIC_0048642616__text2526249418">ECS</span>s before using them to create private images.<ul id="EN-US_TOPIC_0048642616__ul46952306173918"><li id="EN-US_TOPIC_0048642616__li36111246173918">For Windows OSs, download and install Cloudbase-Init.</li><li id="EN-US_TOPIC_0048642616__li31598379173918">For Linux OSs, download and install Cloud-Init.</li></ul>
</div>
<p id="EN-US_TOPIC_0048642616__p9773181454916">After being installed in an image, Cloud-Init or Cloudbase-Init automatically configures initial attributes for the <span id="EN-US_TOPIC_0048642616__text1114712294">ECS</span>s created using this image.</p>
<p id="EN-US_TOPIC_0048642616__p23919191171848">For more information, see <em id="EN-US_TOPIC_0048642616__i8423526979632">Image Management Service User Guide</em>.</p>
</div>
<div class="section" id="EN-US_TOPIC_0048642616__section2746706105950"><h4 class="sectiontitle">Impact on <span id="EN-US_TOPIC_0048642616__text1789415428342">ECS</span></h4><ul id="EN-US_TOPIC_0048642616__ul2000904310113"><li id="EN-US_TOPIC_0048642616__li4158057911579">When creating an <span id="EN-US_TOPIC_0048642616__text128818191429">ECS</span>, if the selected image supports Cloud-Init, you can use the <strong id="EN-US_TOPIC_0048642616__b0450143011233">User Data</strong> function to specify custom configuration, such as <span id="EN-US_TOPIC_0048642616__text12574123817301">ECS</span> login password to the <span id="EN-US_TOPIC_0048642616__text10228125710911">ECS</span>. Such custom settings will take effect upon <span id="EN-US_TOPIC_0048642616__text1435771541017">ECS</span> initialization. For details, see <a href="en-us_topic_0032380449.html">Passing User Data to ECSs</a>.</li><li id="EN-US_TOPIC_0048642616__li4924709610430">If Cloud-Init is supported, ECSs do not support password authentication anymore. All newly created ECSs use key pair authentication. This change will influence your ECS logins. For details, see the following sections:<ul id="EN-US_TOPIC_0048642616__ul19415265103937"><li id="EN-US_TOPIC_0048642616__li42939148103759"><a href="en-us_topic_0013771089.html">Login Overview</a></li><li id="EN-US_TOPIC_0048642616__li24750406103813"><a href="en-us_topic_0037633087.html">What Is the Cloudbase-Init Account in Windows ECSs Used for?</a></li><li id="EN-US_TOPIC_0048642616__li61757858104056"><a href="en-us_topic_0031734664.html">Why Does the Login to My Linux ECS Using a Key File Fail?</a></li><li id="EN-US_TOPIC_0048642616__li12097450103839"><a href="en-us_topic_0031736846.html">Why Does the System Display a Message Indicating that the Password for Logging In to a Windows ECS Cannot Be Obtained?</a></li></ul>
<div class="section" id="EN-US_TOPIC_0048642616__section2746706105950"><h4 class="sectiontitle">Impact on <span id="EN-US_TOPIC_0048642616__text1789415428342">ECS</span></h4><ul id="EN-US_TOPIC_0048642616__ul2000904310113"><li id="EN-US_TOPIC_0048642616__li4158057911579">When creating an <span id="EN-US_TOPIC_0048642616__text128818191429">ECS</span>, if the selected image supports Cloud-Init, you can use the <strong id="EN-US_TOPIC_0048642616__b0450143011233">User Data</strong> function to specify custom configuration, such as <span id="EN-US_TOPIC_0048642616__text12574123817301">ECS</span> login password to the <span id="EN-US_TOPIC_0048642616__text10228125710911">ECS</span>. Such custom settings will take effect upon <span id="EN-US_TOPIC_0048642616__text1435771541017">ECS</span> initialization. For details, see <a href="en-us_topic_0032380449.html">Passing User Data to ECSs</a>.</li><li id="EN-US_TOPIC_0048642616__li4924709610430">If Cloud-Init is supported, ECSs do not support password authentication anymore. All newly created ECSs use key pair authentication. This change will influence your ECS logins. For details, see the following sections:<ul id="EN-US_TOPIC_0048642616__ul19415265103937"><li id="EN-US_TOPIC_0048642616__li42939148103759"><a href="en-us_topic_0013771089.html">Login Overview (Linux)</a></li><li id="EN-US_TOPIC_0048642616__li24750406103813"><a href="en-us_topic_0037633087.html">What Is the Cloudbase-Init Account in Windows ECSs Used for?</a></li><li id="EN-US_TOPIC_0048642616__li61757858104056"><a href="en-us_topic_0031734664.html">Why Does the Login to My Linux ECS Using a Key File Fail?</a></li><li id="EN-US_TOPIC_0048642616__li12097450103839"><a href="en-us_topic_0031736846.html">Why Does the System Display a Message Indicating that the Password for Logging In to a Windows ECS Cannot Be Obtained?</a></li></ul>
</li><li id="EN-US_TOPIC_0048642616__li25296237101910">If Cloud-Init is supported, you can view and use metadata to configure and manage running <span id="EN-US_TOPIC_0048642616__text14752153254217">ECS</span>s. For details, see <a href="en-us_topic_0042400609.html">Obtaining Metadata</a>.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0048642616__section4202207210118"><h4 class="sectiontitle">Impact on AS</h4><ul id="EN-US_TOPIC_0048642616__ul11675179111444"><li id="EN-US_TOPIC_0048642616__li17822332111444">When creating an AS configuration, you can use the <strong id="EN-US_TOPIC_0048642616__b7901175110233">User Data</strong> function to specify <span id="EN-US_TOPIC_0048642616__text2732946174214">ECS</span> configurations for initialization. If the AS configuration has taken effect in an AS group, the <span id="EN-US_TOPIC_0048642616__text11779154943119">ECS</span>s newly created in the AS group will automatically initialize their configurations based on the specified <span id="EN-US_TOPIC_0048642616__text5281103441117">ECS</span> configurations.</li><li id="EN-US_TOPIC_0048642616__li27735704111447">For an existing AS configuration, if its private image does not have Cloud-Init or Cloudbase-Init installed, the login mode of the <span id="EN-US_TOPIC_0048642616__text498535803212">ECS</span>s created in the AS group where the AS configuration takes effect may fail to take effect.<p id="EN-US_TOPIC_0048642616__p1760013719529">To resolve this issue, see "How Does Cloud-Init Affect the AS Service?" in <em id="EN-US_TOPIC_0048642616__i1284589276">Auto Scaling User Guide</em>.</p>
<div class="section" id="EN-US_TOPIC_0048642616__section4202207210118"><h4 class="sectiontitle">Impact on AS</h4><ul id="EN-US_TOPIC_0048642616__ul11675179111444"><li id="EN-US_TOPIC_0048642616__li17822332111444">When creating an AS configuration, you can use the <strong id="EN-US_TOPIC_0048642616__b7901175110233">User Data</strong> function to specify <span id="EN-US_TOPIC_0048642616__text2732946174214">ECS</span> configurations for initialization. If the AS configuration has taken effect in an AS group, the <span id="EN-US_TOPIC_0048642616__text11779154943119">ECS</span>s newly created in the AS group will automatically initialize their configurations based on the specified <span id="EN-US_TOPIC_0048642616__text5281103441117">ECS</span> configurations.</li><li id="EN-US_TOPIC_0048642616__li27735704111447">For an existing AS configuration, if its private image does not have Cloud-Init or Cloudbase-Init installed, the login mode of the <span id="EN-US_TOPIC_0048642616__text498535803212">ECS</span>s created in the AS group where the AS configuration takes effect may fail to take effect.<p id="EN-US_TOPIC_0048642616__p1760013719529">To resolve this issue, see "How Does Cloud-Init Affect the AS Service?" in <em id="EN-US_TOPIC_0048642616__i829697757">Auto Scaling User Guide</em>.</p>
</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0048642616__section44995720162019"><h4 class="sectiontitle">Notes</h4><ul id="EN-US_TOPIC_0048642616__ul27309930162147"><li id="EN-US_TOPIC_0048642616__li57792420162147">When using Cloud-Init, enable DHCP in the VPC to which the <span id="EN-US_TOPIC_0048642616__text1781819502422">ECS</span> belongs.</li><li id="EN-US_TOPIC_0048642616__li3134774162149">When using Cloud-Init, ensure that security group rules for the outbound direction meet the following requirements:<ul id="EN-US_TOPIC_0048642616__ul58881557162226"><li id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_li4991456153157"><strong id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_b84235270617418">Protocol</strong>: <strong id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_b842352706174111">TCP</strong></li><li id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_li5391447153614"><strong id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_b842352706174117">Port</strong>: <strong id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_b842352706174120">80</strong></li><li id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_li57518749153625"><strong id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_b7921153132519">Destination</strong>: <strong id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_b1492117320252">169.254.0.0/16</strong></li></ul>
<div class="section" id="EN-US_TOPIC_0048642616__section44995720162019"><h4 class="sectiontitle">Notes</h4><ul id="EN-US_TOPIC_0048642616__ul27309930162147"><li id="EN-US_TOPIC_0048642616__li57792420162147">When using Cloud-Init, enable DHCP in the VPC which the <span id="EN-US_TOPIC_0048642616__text1781819502422">ECS</span> belongs to.</li><li id="EN-US_TOPIC_0048642616__li3134774162149">When using Cloud-Init, ensure that security group rules for the outbound direction meet the following requirements:<ul id="EN-US_TOPIC_0048642616__ul58881557162226"><li id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_li4991456153157"><strong id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_b84235270617418">Protocol</strong>: <strong id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_b842352706174111">TCP</strong></li><li id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_li5391447153614"><strong id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_b842352706174117">Port</strong>: <strong id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_b842352706174120">80</strong></li><li id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_li57518749153625"><strong id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_b7921153132519">Destination</strong>: <strong id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_b1492117320252">169.254.0.0/16</strong></li></ul>
<div class="note" id="EN-US_TOPIC_0048642616__note40094412162251"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0048642616__en-us_topic_0042400609_p6641537815423">If you use the default security group rules for the outbound direction, the metadata can be accessed because the default rules meet the preceding requirements. For details about the default security group rules for the outbound direction, see <a href="en-us_topic_0030828257.html#EN-US_TOPIC_0030828257__section15617142420109">Security Group</a>.</p>
</div></div>
</li></ul>

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</div>
<div class="section" id="EN-US_TOPIC_0057711189__section24136850162414"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0057711189__ol912751214117"><li id="EN-US_TOPIC_0057711189__li18794256135515"><span>Log in to the <span id="EN-US_TOPIC_0057711189__text1711148541">ECS</span>.</span></li><li id="EN-US_TOPIC_0057711189__li28042285214117"><span>Check and modify the grub file.</span><p><div class="p" id="EN-US_TOPIC_0057711189__p23745547161255">The configuration method varies depending on the OS.<div class="note" id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_note999712176384"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_p5998131714384">To prevent impact on the start of the recovery mode, you are advised to modify only the item used for the default start.</p>
</div></div>
<ul id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_ul18769785171238"><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li1325741171238">For CentOS and Red Hat 6, perform the following steps:<ol type="a" id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_ol41624950171443"><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li45594548171443">Run the following command to open the configuration file:<p id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_p57885201171447"><a name="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li45594548171443"></a><a name="en-us_topic_0057450886_li45594548171443"></a><strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b7697751171443">vi /boot/grub/menu.lst</strong></p>
<ul id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_ul18769785171238"><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li1325741171238">For CentOS 6 and Red Hat 6, perform the following steps:<ol type="a" id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_ol41624950171443"><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li45594548171443">Run the following command to open the configuration file:<p id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_p57885201171447"><a name="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li45594548171443"></a><a name="en-us_topic_0057450886_li45594548171443"></a><strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b7697751171443">vi /boot/grub/menu.lst</strong></p>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li19538075171443">Locate the row that contains <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b842352706115641">linux</strong>, <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b842352706115649">linux16</strong>, or <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b842352706115658">kernel</strong> (depending on the system), add <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b842352706115711">console=ttyS0</strong> to its end, and delete parameter <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b842352706115723">rhgb quiet</strong>. If <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b92835785919637">console=ttyS0</strong> already exists, you do not need to add it. Save the change and exit.</li></ol>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li6061980171248">For CentOS 7, Red Hat 7, and Ubuntu 14, perform the following steps:<ol type="a" id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_ol4344894171452"><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li58180088171452">Run the following command to open the configuration file:<p id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_p55209546171459"><a name="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li58180088171452"></a><a name="en-us_topic_0057450886_li58180088171452"></a><strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b58365653175441">vi /boot/grub2/grub.cfg</strong></p>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li482766171452">Locate the row that contains <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1290812151">linux</strong>, <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1420084945">linux16</strong>, or <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1943280773">kernel</strong> (depending on the system), add <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1082519500">console=ttyS0</strong> to its end, and delete parameter <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b318630904">rhgb quiet</strong>. If <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1517333686">console=ttyS0</strong> already exists, you do not need to add it. Save the change and exit.</li></ol>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li482766171452">Locate the row that contains <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b988168152">linux</strong>, <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1537884474">linux16</strong>, or <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b2071723053">kernel</strong> (depending on the system), add <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1805678113">console=ttyS0</strong> to its end, and delete parameter <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b792683246">rhgb quiet</strong>. If <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b762978066">console=ttyS0</strong> already exists, you do not need to add it. Save the change and exit.</li></ol>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li499662617132">For SUSE Linux 11, perform the following steps:<ol type="a" id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_ol36144979171413"><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li39085626171413">Run the following command to open the configuration file:<p id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_p2611227517147"><a name="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li39085626171413"></a><a name="en-us_topic_0057450886_li39085626171413"></a><strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b45748722171837">vi /boot/grub/menu.1st</strong></p>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li25642817171428">Locate the row that contains <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b920929005">linux</strong>, <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b615041073">linux16</strong>, or <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1813885751">kernel</strong> (depending on the system) and add <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1337927186">console=ttyS0</strong> to its end. If <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1635567279">console=ttyS0</strong> already exists, you do not need to add it. Save the change and exit.</li></ol>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li25642817171428">Locate the row that contains <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b215521630">linux</strong>, <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1011710740">linux16</strong>, or <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1836342707">kernel</strong> (depending on the system) and add <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1493444810">console=ttyS0</strong> to its end. If <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1772023644">console=ttyS0</strong> already exists, you do not need to add it. Save the change and exit.</li></ol>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li62848105171712">For SUSE Linux 12, openSUSE 13, and openSUSE 42, perform the following steps:<ol type="a" id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_ol28762041171712"><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li57531782171712">Run the following command to open the configuration file:<p id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_p48023993171712"><a name="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li57531782171712"></a><a name="en-us_topic_0057450886_li57531782171712"></a><strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b38870278172219">vi /boot/grub2/grub.cfg</strong></p>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li64738205171712">Locate the row that contains <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b541734133">linux</strong>, <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b280528699">linux16</strong>, or <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1473615543">kernel</strong> (depending on the system) and add <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b847449827115924">console=ttyS0</strong> to its end. If <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1993155176">console=ttyS0</strong> already exists, you do not need to add it. Save the change and exit.</li></ol>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li64738205171712">Locate the row that contains <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b2033202239">linux</strong>, <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b336879893">linux16</strong>, or <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b74225742">kernel</strong> (depending on the system) and add <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b847449827115924">console=ttyS0</strong> to its end. If <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1654442546">console=ttyS0</strong> already exists, you do not need to add it. Save the change and exit.</li></ol>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li8983690171710">For Debian and Ubuntu 16, perform the following steps:<ol type="a" id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_ol13744349171710"><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li56590279171710">Run the following command to open the configuration file:<p id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_p39550465171710"><a name="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li56590279171710"></a><a name="en-us_topic_0057450886_li56590279171710"></a><strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b54593791172530">vi /boot/grub/grub.cfg</strong></p>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li49471090171710">Locate the row that contains <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1175607315">linux</strong>, <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b747071421">linux16</strong>, or <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1898970644">kernel</strong> (depending on the system) and add <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b101027624">console=ttyS0</strong> to its end. If <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1462491901">console=ttyS0</strong> already exists, you do not need to add it. Save the change and exit.</li></ol>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li49471090171710">Locate the row that contains <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1865281285">linux</strong>, <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1972108689">linux16</strong>, or <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b868735994">kernel</strong> (depending on the system) and add <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1172001478">console=ttyS0</strong> to its end. If <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1941940586">console=ttyS0</strong> already exists, you do not need to add it. Save the change and exit.</li></ol>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li4553691517177">For Fedora, perform the following steps:<ol type="a" id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_ol717905417177"><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li6461149317177">Run the following command to open the configuration file:<p id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_p4463252717177"><a name="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li6461149317177"></a><a name="en-us_topic_0057450886_li6461149317177"></a><strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b40031083172624">vi /boot/grub2/grub.cfg</strong></p>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li5846497317177">Locate the row that contains <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1612479029">linux</strong>, <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1028540883">linux16</strong>, or <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1763567926">kernel</strong> (depending on the system) and add <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b2000575844">console=ttyS0</strong> to its end. If <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1223337530">console=ttyS0</strong> already exists, you do not need to add it. Save the change and exit.</li></ol>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li5846497317177">Locate the row that contains <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1526339780">linux</strong>, <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b2082286059">linux16</strong>, or <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1023269332">kernel</strong> (depending on the system) and add <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b1238656126">console=ttyS0</strong> to its end. If <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b835606829">console=ttyS0</strong> already exists, you do not need to add it. Save the change and exit.</li></ol>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li106424171526">For FreeBSD, perform the following steps:<ol type="a" id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_ol957823171526"><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li8620413171526">Run the following command to open the configuration file:<p id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_p10474859171526"><a name="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li8620413171526"></a><a name="en-us_topic_0057450886_li8620413171526"></a><strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b4471428217566">vi /boot/loader.conf</strong></p>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li43157284171526">Add <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b842352706175832">console="comconsole"</strong>. If <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b67325338">console="comconsole"</strong> already exists, you do not need to add it. Save the change and exit.</li></ol>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li43157284171526">Add <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b842352706175832">console="comconsole"</strong>. If <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b858535039">console="comconsole"</strong> already exists, you do not need to add it. Save the change and exit.</li></ol>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li58358914172853">For CoreOS, perform the following steps:<ol type="a" id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_ol55468183172853"><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li45429473172941">Run the following command to check whether <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b842352706175921">ttyS0</strong> has been configured:<p id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_p3717713017324"><strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b39660533173218">cat /proc/cmdline | grep ttyS0</strong></p>
<ul id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_ul39194071173021"><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li42793695173021">If yes, <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b769578641175950">ttyS0</strong> has been configured.</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li27524297173038">If no, <strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b18579132912131">ttyS0</strong> has not been configured. Go to <a href="#EN-US_TOPIC_0057711189__en-us_topic_0057450886_li29451607172853">2.b</a>.</li></ul>
</li><li id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li29451607172853"><a name="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li29451607172853"></a><a name="en-us_topic_0057450886_li29451607172853"></a>Run the following command to open the configuration file to be edited:<p id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_p28525433173339"><a name="EN-US_TOPIC_0057711189__en-us_topic_0057450886_li29451607172853"></a><a name="en-us_topic_0057450886_li29451607172853"></a><strong id="EN-US_TOPIC_0057711189__en-us_topic_0057450886_b47034320173348">vi /usr/share/oem/grub.cfg</strong></p>

4
docs/ecs/umn/en-us_topic_0058758453.html
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@ -7,7 +7,7 @@
<ul id="EN-US_TOPIC_0058758453__ul18339124413523"><li id="EN-US_TOPIC_0058758453__li93409442529">If the <span id="EN-US_TOPIC_0058758453__text123671732152610">ECS</span> was created using a public image listed in <a href="#EN-US_TOPIC_0058758453__section892862210138">Support of NIC Multi-Queue</a>, NIC multi-queue has been enabled on the <span id="EN-US_TOPIC_0058758453__text192036472266">ECS</span> by default. Therefore, you do not need to perform the operations described in this section.</li><li id="EN-US_TOPIC_0058758453__li1895904011918">If the ECS was created using a private image and the OS of the external image file is listed in <a href="#EN-US_TOPIC_0058758453__section892862210138">Support of NIC Multi-Queue</a>, perform the following operations to enable NIC multi-queue:<ol id="EN-US_TOPIC_0058758453__ol17110762810"><li id="EN-US_TOPIC_0058758453__li1112713287"><a href="#EN-US_TOPIC_0058758453__section1659682611504">Importing the External Image File to the IMS Console</a></li><li id="EN-US_TOPIC_0058758453__li53532712283"><a href="#EN-US_TOPIC_0058758453__section1949113217282">Setting NIC Multi-Queue for the Image</a></li><li id="EN-US_TOPIC_0058758453__li8105536102818"><a href="#EN-US_TOPIC_0058758453__section1841681225617">Creating an ECS Using a Private Image</a></li><li id="EN-US_TOPIC_0058758453__li19115173516"><a href="#EN-US_TOPIC_0058758453__section214227201118">Enabling NIC Multi-Queue</a></li></ol>
</li></ul>
<div class="section" id="EN-US_TOPIC_0058758453__section892862210138"><a name="EN-US_TOPIC_0058758453__section892862210138"></a><a name="section892862210138"></a><h4 class="sectiontitle">Support of NIC Multi-Queue</h4><p id="EN-US_TOPIC_0058758453__p1813542419615">NIC multi-queue can be enabled on an <span id="EN-US_TOPIC_0058758453__text10250582313">ECS</span> only when the <span id="EN-US_TOPIC_0058758453__text5960131412718">ECS</span> specifications, virtualization type, and image OS meet the requirements described in this section.</p>
<ul id="EN-US_TOPIC_0058758453__ul16287543717"><li id="EN-US_TOPIC_0058758453__li1357793002014">For details about the ECS specifications that support NIC multi-queue, see <a href="en-us_topic_0132345719.html">ECS Specifications and Types</a>.<div class="note" id="EN-US_TOPIC_0058758453__note105772301203"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0058758453__p75776303202">If the number of NIC queues is greater than 1, NIC multi-queue is supported.</p>
<ul id="EN-US_TOPIC_0058758453__ul16287543717"><li id="EN-US_TOPIC_0058758453__li1357793002014">For details about the ECS specifications that support NIC multi-queue, see <a href="en-us_topic_0132345719.html">ECS Specifications</a>.<div class="note" id="EN-US_TOPIC_0058758453__note105772301203"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0058758453__p75776303202">If the number of NIC queues is greater than 1, NIC multi-queue is supported.</p>
</div></div>
</li><li id="EN-US_TOPIC_0058758453__li15287546717">The virtualization type must be KVM.</li><li id="EN-US_TOPIC_0058758453__li6990243163614">The Linux public images listed in <a href="#EN-US_TOPIC_0058758453__table1572993710538">Table 2</a> support NIC multi-queue.<div class="note" id="EN-US_TOPIC_0058758453__note1099084343617"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0058758453__ul395563414619"><li id="EN-US_TOPIC_0058758453__li157643965">Windows public images have not supported NIC multi-queue. If you enable NIC multi-queue in a Windows public image, starting an ECS created using such an image may be slow.</li><li id="EN-US_TOPIC_0058758453__li10294640361">It is a good practice to upgrade the kernel version of the Linux ECS to 2.6.35 or later. Otherwise, NIC multi-queue is not supported.<p id="EN-US_TOPIC_0058758453__p1029434015618"><a name="EN-US_TOPIC_0058758453__li10294640361"></a><a name="li10294640361"></a>Run the <strong id="EN-US_TOPIC_0058758453__b12001614193418">uname -r</strong> command to obtain the kernel version. If the kernel version is earlier than 2.6.35, contact technical support to upgrade the kernel.</p>
</li></ul>
@ -273,7 +273,7 @@ done</pre>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0092497777.html">NICs</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0092497777.html">NIC</a></div>
</div>
</div>

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@ -29,7 +29,7 @@
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0013771097.html">Instances</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0176502615.html">Managing ECSs</a></div>
</div>
</div>

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@ -17,7 +17,7 @@
</p></li><li id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_li33296033102625"><a name="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_li33296033102625"></a><a name="en-us_topic_0000001855867909_en-us_topic_0000001855169053_li33296033102625"></a><span>Disks are displayed in the right pane. In the <strong id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_b842352706192224">Disk 1</strong> area, right-click <strong id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_b842352706192244">Offline</strong> and choose <strong id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_b842352706192256">Online</strong> from the shortcut menu to online the disk.</span><p><div class="fignone" id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_fig102484362217"><span class="figcap"><b>Figure 2 </b>Online the disk</span><br><span><img id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_image171261348175312" src="en-us_image_0000001809029912.png" title="Click to enlarge" class="imgResize"></span></div>
<div class="note" id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_note4504418111734"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_p274444611734">If the disk is offline, you need to bring it online before initializing it.</p>
</div></div>
</p></li><li id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_li1703337311146"><span>After making the disk online, the disk status changes from <strong id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_b689355908171858">Offline</strong> to <strong id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_b58237880171858">Not Initialized</strong>. Right-click the disk status and choose <strong id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_b542117337171858">Initialize Disk</strong> from the shortcut menu.</span><p><div class="fignone" id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_fig409808111224"><span class="figcap"><b>Figure 3 </b>Initialize Disk</span><br><span><img id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_image2374105914559" src="en-us_image_0000001809189756.png" title="Click to enlarge" class="imgResize"></span></div>
</p></li><li id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_li1703337311146"><span>After making the disk online, the status of <strong id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_b5563919135">Disk 1</strong> changes from <strong id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_b689355908171858">Offline</strong> to <strong id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_b58237880171858">Not Initialized</strong>. Right-click the disk status and choose <strong id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_b542117337171858">Initialize Disk</strong> from the shortcut menu.</span><p><div class="fignone" id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_fig409808111224"><span class="figcap"><b>Figure 3 </b>Initialize Disk</span><br><span><img id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_image2374105914559" src="en-us_image_0000001809189756.png" title="Click to enlarge" class="imgResize"></span></div>
</p></li><li id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_li34991214122212"><a name="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_li34991214122212"></a><a name="en-us_topic_0000001855867909_en-us_topic_0000001855169053_li34991214122212"></a><span>In the <strong id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_b842352706165531">Initialize Disk</strong> dialog box, select the target disk, click <strong id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_b842352706165554">MBR (Master Boot Record)</strong> or <strong id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_b12309111733110">GPT (GUID Partition Table)</strong>, and click <strong id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_b842352706165612">OK</strong>.</span><p><div class="fignone" id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_fig68332918241"><a name="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_fig68332918241"></a><a name="en-us_topic_0000001855867909_en-us_topic_0000001855169053_fig68332918241"></a><span class="figcap"><b>Figure 4 </b>Unallocated space</span><br><span><img id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_image15264857111617" src="en-us_image_0000001855868557.png" title="Click to enlarge" class="imgResize"></span></div>
<div class="p" id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_p46071644112515"><div class="notice" id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_note9642468151238"><span class="noticetitle"><img src="public_sys-resources/notice_3.0-en-us.png"> </span><div class="noticebody"><p id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_en-us_topic_0085245975_p11834286151113">The maximum disk size supported by MBR is 2 TiB, and that supported by GPT is 18 EiB. Because an EVS data disk currently supports up to 32 TiB, use GPT if your disk size is greater than 2 TiB.</p>
<p id="EN-US_TOPIC_0085634796__en-us_topic_0000001855867909_en-us_topic_0000001855169053_en-us_topic_0085245975_p612681541585">If the partition style is changed after the disk has been used, all data on the disk will be lost, so take care to select an appropriate partition style when initializing the disk. If you must change the partition style to GPT after a disk has been used, it is recommended that you back up the disk data before the change.</p>

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@ -69,8 +69,8 @@ First sector (2048-209715199, default 2048):</pre>
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-209715199, default 209715199):</pre>
</div>
<p id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_en-us_topic_0000001808330216_p4034033118642"><span class="parmname" id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_parmname844857410"><b>Last sector</b></span> indicates the end sector. The value ranges from <strong id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_b2107546067">2048</strong> to <strong id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_en-us_topic_0000001808330216_b1798151514556">209715199</strong>, and the default value is <strong id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_b1919025971">209715199</strong>.</p>
</p></li><li id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_en-us_topic_0000001808330216_li657968113217"><span>Select the default end sector <strong id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_en-us_topic_0000001808330216_b842352706112515">209715199</strong> and press <strong id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_b2008232583">Enter</strong>.</span><p><p id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_en-us_topic_0000001808330216_p1675124661216">The system displays the start and end sectors of the partition's available space. You can customize the value within this range or use the default value. The start sector must be smaller than the partition's end sector.</p>
<p id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_en-us_topic_0000001808330216_p4034033118642"><span class="parmname" id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_parmname689410059"><b>Last sector</b></span> indicates the end sector. The value ranges from <strong id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_b1328832187">2048</strong> to <strong id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_en-us_topic_0000001808330216_b1798151514556">209715199</strong>, and the default value is <strong id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_b1411273467">209715199</strong>.</p>
</p></li><li id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_en-us_topic_0000001808330216_li657968113217"><span>Select the default end sector <strong id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_en-us_topic_0000001808330216_b842352706112515">209715199</strong> and press <strong id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_b2049046632">Enter</strong>.</span><p><p id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_en-us_topic_0000001808330216_p1675124661216">The system displays the start and end sectors of the partition's available space. You can customize the value within this range or use the default value. The start sector must be smaller than the partition's end sector.</p>
<p id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_en-us_topic_0000001808330216_p457918818329">Information similar to the following is displayed:</p>
<pre class="screen" id="EN-US_TOPIC_0085634797__en-us_topic_0000001809189108_en-us_topic_0000001808330216_screen116541323132915">Last sector, +sectors or +size{K,M,G} (2048-209715199, default 209715199):
Using default value 209715199

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<ul class="ullinks">
<li class="ulchildlink"><strong><a href="en-us_topic_0000001449637793.html">Data Protection</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0000001174675379.html">Fault Recovery</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0046566932.html">License Types</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0070518971.html">Project</a></strong><br>

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</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0271001300.html">Instances</a></div>
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0271001300.html">ECS Types and Specifications</a></div>
</div>
</div>

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