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bms_umn_0309

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Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: guoyanyan <guoyanyan3@huawei.com>
Co-committed-by: guoyanyan <guoyanyan3@huawei.com>
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guoyanyan 2023-04-12 13:06:01 +00:00 committed by zuul
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<h1 class="topictitle1">Creating a BMS Supporting Quick Provisioning</h1>
<div id="body1435883576187"><div class="section" id="EN-US_TOPIC_0053536894__section3085770410423"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0053536894__p8060118">When you create a common BMS (that is, a BMS booted from a local disk), its OS needs to be downloaded from the cloud and it also takes some time to install the OS. When you create a BMS that uses an EVS as its system disk, the OS has been installed on the disk and does not need to be downloaded or installed. In this way, the BMS can be provisioned within a short time when you apply for it.</p>
<p id="EN-US_TOPIC_0053536894__p202721157192513">BMSs supporting quick provisioning have the following advantages over other BMSs:</p>
<ul id="EN-US_TOPIC_0053536894__ul1673513472812"><li id="EN-US_TOPIC_0053536894__li197351934142810">BMSs booted from EVS disks can be provisioned within about 5 minutes.</li><li id="EN-US_TOPIC_0053536894__li5713555182815">BMSs support CSBS backups, ensuring data security.</li><li id="EN-US_TOPIC_0053536894__li490011528335">BMS rebuilding upon faults is supported, enabling quick service recovery.</li><li id="EN-US_TOPIC_0053536894__li04591573810">An image of a BMS can be exported to apply configurations of the BMS to other BMSs, eliminating the need to repeatedly configure BMSs.</li></ul>
<ul id="EN-US_TOPIC_0053536894__ul1673513472812"><li id="EN-US_TOPIC_0053536894__li197351934142810">BMSs booted from EVS disks can be provisioned within about 5 minutes.</li><li id="EN-US_TOPIC_0053536894__li5713555182815">CSBS backups ensure data security.</li><li id="EN-US_TOPIC_0053536894__li490011528335">BMS rebuilding upon faults is supported, enabling quick service recovery.</li><li id="EN-US_TOPIC_0053536894__li04591573810">An image of a BMS can be exported to apply configurations of the BMS to other BMSs, eliminating the need to repeatedly configure BMSs.</li></ul>
<p id="EN-US_TOPIC_0053536894__p184139804312">On the page for creating a BMS, select a flavor that supports quick BMS provisioning, set the system disk type and capacity, and configure other required parameters.</p>
</div>
<div class="section" id="EN-US_TOPIC_0053536894__section3498539110333"><h4 class="sectiontitle">Procedure</h4><p id="EN-US_TOPIC_0053536894__p2935510255">You can create a BMS supporting quick provisioning by following the instructions in <a href="en-us_topic_0053536933.html">Creating a Common BMS</a>.</p>

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</div>
<div class="section" id="EN-US_TOPIC_0053536933__section1936519509264"><h4 class="sectiontitle">Prerequisites</h4><ul id="EN-US_TOPIC_0053536933__ul182391910202815"><li id="EN-US_TOPIC_0053536933__li42391810162813">You have completed <a href="en-us_topic_0083737005.html">Preparations</a>.</li><li id="EN-US_TOPIC_0053536933__li657182210307">To inject user data, you have prepared <a href="en-us_topic_0083737011.html">user data scripts</a>.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0053536933__section45090433181819"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0053536933__ol840959510341"><li id="EN-US_TOPIC_0053536933__li5014483410341">Log in to the management console.</li><li id="EN-US_TOPIC_0053536933__li4325763319221">Under <strong id="EN-US_TOPIC_0053536933__b651565561">Computing</strong>, click <strong id="EN-US_TOPIC_0053536933__b1151888554">Bare Metal Server</strong>.<p id="EN-US_TOPIC_0053536933__p5377438219221">The BMS console is displayed.</p>
</li><li id="EN-US_TOPIC_0053536933__li7877899105917">Click <strong id="EN-US_TOPIC_0053536933__b1769309053">Allocate BMS</strong>.</li><li id="EN-US_TOPIC_0053536933__li171249226259">Select a region.<p id="EN-US_TOPIC_0053536933__p012417223257"><a name="EN-US_TOPIC_0053536933__li171249226259"></a><a name="li171249226259"></a>BMSs in different regions cannot communicate with each other over an intranet. You are advised to select the region closest to your services to lower the network delay and improve the access speed. Note that after a BMS is created, its region cannot be changed.</p>
<div class="section" id="EN-US_TOPIC_0053536933__section45090433181819"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0053536933__ol840959510341"><li id="EN-US_TOPIC_0053536933__li5014483410341">Log in to the management console.</li><li id="EN-US_TOPIC_0053536933__li4325763319221">Under <strong id="EN-US_TOPIC_0053536933__b35285644">Computing</strong>, click <strong id="EN-US_TOPIC_0053536933__b1265807531">Bare Metal Server</strong>.<p id="EN-US_TOPIC_0053536933__p5377438219221">The BMS console is displayed.</p>
</li><li id="EN-US_TOPIC_0053536933__li7877899105917">Click <strong id="EN-US_TOPIC_0053536933__b83793602">Allocate BMS</strong>.</li><li id="EN-US_TOPIC_0053536933__li171249226259">Select a region.<p id="EN-US_TOPIC_0053536933__p012417223257"><a name="EN-US_TOPIC_0053536933__li171249226259"></a><a name="li171249226259"></a>BMSs in different regions cannot communicate with each other over an intranet. You are advised to select the region closest to your services to lower the network delay and improve the access speed. Note that after a BMS is created, its region cannot be changed.</p>
</li><li id="EN-US_TOPIC_0053536933__en-us_topic_0013859510_li5888528011813">Select an AZ.<p id="EN-US_TOPIC_0053536933__en-us_topic_0013859510_p28624073201254"><a name="EN-US_TOPIC_0053536933__en-us_topic_0013859510_li5888528011813"></a><a name="en-us_topic_0013859510_li5888528011813"></a>An AZ is a physical region where resources use independent power supply and networks. AZs are physically isolated but interconnected through an internal network.</p>
<ul id="EN-US_TOPIC_0053536933__ul13651523133211"><li id="EN-US_TOPIC_0053536933__li136512234329">It is recommended that you create BMSs in different AZs to ensure high availability of applications running on the BMSs.</li><li id="EN-US_TOPIC_0053536933__li19214113315327">To lower the network delay, create BMSs in the same AZ.</li></ul>
</li><li id="EN-US_TOPIC_0053536933__li1515274917103">Select a flavor.<p id="EN-US_TOPIC_0053536933__p136594393119"><a name="EN-US_TOPIC_0053536933__li1515274917103"></a><a name="li1515274917103"></a><strong id="EN-US_TOPIC_0053536933__b3387134123411">Flavor</strong> contains the CPU, memory, local disks, and extended configuration of the BMS. After you select a flavor, the name and use scenarios of the flavor are displayed under the flavor list.</p>
<p id="EN-US_TOPIC_0053536933__p208374127256"><strong id="EN-US_TOPIC_0053536933__b38023073">Extended Configuration</strong> provides the NIC information of the selected flavor. For example, 2 x 2*10GE indicates that the BMS has two 10GE NICs, each with two ports. One NIC is used for the BMS to connect to a VPC and the other is used for the BMS to communicate with other BMSs in a high-speed network.</p>
<p id="EN-US_TOPIC_0053536933__p208374127256"><strong id="EN-US_TOPIC_0053536933__b1420995253">Extended Configuration</strong> provides the NIC information of the selected flavor. For example, 2 x 2*10GE indicates that the BMS has two 10GE NICs, each with two ports. One NIC is used for the BMS to connect to a VPC and the other is used for the BMS to communicate with other BMSs in a high-speed network.</p>
<div class="note" id="EN-US_TOPIC_0053536933__note367644812128"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0053536933__ul998710527352"><li id="EN-US_TOPIC_0053536933__li109872052103510">Configuration in the flavor, such as the CPU, memory, and local disks, cannot be changed.</li><li id="EN-US_TOPIC_0053536933__li17988145283513">The bandwidth of different BMS flavors varies. Choose a flavor that meets your requirements.</li><li id="EN-US_TOPIC_0053536933__li33471454419">Some flavors support quick BMS provisioning. If you select a flavor of this type, parameter <strong id="EN-US_TOPIC_0053536933__b1428022152120">System Disk</strong> is displayed under <strong id="EN-US_TOPIC_0053536933__b14149044122119">Disk</strong>. The OS will be installed on the EVS disk attached to the BMS.</li></ul>
</div></div>
</li><li id="EN-US_TOPIC_0053536933__li1024877191620">Set <strong id="EN-US_TOPIC_0053536933__b1985312817">Image</strong>.<ul id="EN-US_TOPIC_0053536933__ul077310516166"><li id="EN-US_TOPIC_0053536933__li187741751171616">Public Image<p id="EN-US_TOPIC_0053536933__p778025111165"><a name="EN-US_TOPIC_0053536933__li187741751171616"></a><a name="li187741751171616"></a>A public image is a standard OS image provided by the system and is available to all users. It contains an OS and pre-installed public applications, such as the SDI iNIC driver, bms-network-config (a network configuration program), and Cloud-Init (an initialization tool). If you need other applications or software, configure them on the new BMSs.</p>
</li><li id="EN-US_TOPIC_0053536933__li1024877191620">Set <strong id="EN-US_TOPIC_0053536933__b337642973">Image</strong>.<ul id="EN-US_TOPIC_0053536933__ul077310516166"><li id="EN-US_TOPIC_0053536933__li187741751171616">Public Image<p id="EN-US_TOPIC_0053536933__p778025111165"><a name="EN-US_TOPIC_0053536933__li187741751171616"></a><a name="li187741751171616"></a>A public image is a standard OS image provided by the system and is available to all users. It contains an OS and pre-installed public applications, such as the SDI iNIC driver, bms-network-config (a network configuration program), and Cloud-Init (an initialization tool). If you need other applications or software, configure them on the new BMSs.</p>
</li><li id="EN-US_TOPIC_0053536933__li10782115114166">Private Image<p id="EN-US_TOPIC_0053536933__p378385112165"><a name="EN-US_TOPIC_0053536933__li10782115114166"></a><a name="li10782115114166"></a>A private image is created from an external image file or a BMS and is available only to the user who created it. It contains an OS, preinstalled public applications, and the user's private applications. </p>
</li><li id="EN-US_TOPIC_0053536933__li10787185114169">Shared Image<p id="EN-US_TOPIC_0053536933__p15789155112167"><a name="EN-US_TOPIC_0053536933__li10787185114169"></a><a name="li10787185114169"></a>A shared image is a private image shared by another public cloud user with you.</p>
</li></ul>
</li><li id="EN-US_TOPIC_0053536933__li101792515174">Set <strong id="EN-US_TOPIC_0053536933__b1304227817">License Type</strong>.<p id="EN-US_TOPIC_0053536933__p92901134171920">Set a license type for using an OS or software on the cloud platform. This parameter is available only if the public image you selected is charged.</p>
</li><li id="EN-US_TOPIC_0053536933__li101792515174">Set <strong id="EN-US_TOPIC_0053536933__b1107869378">License Type</strong>.<p id="EN-US_TOPIC_0053536933__p92901134171920">Set a license type for using an OS or software on the cloud platform. This parameter is available only if the public image you selected is charged.</p>
<ul id="EN-US_TOPIC_0053536933__ul17821726141911"><li id="EN-US_TOPIC_0053536933__li10823726171919">Use license from the system<p id="EN-US_TOPIC_0053536933__p14827152614190"><a name="EN-US_TOPIC_0053536933__li10823726171919"></a><a name="li10823726171919"></a>Allows you to use the license provided by the cloud platform. Obtaining the authorization of such a license is charged.</p>
</li><li id="EN-US_TOPIC_0053536933__li98281626121911">Bring your own licenses (BYOL)<p id="EN-US_TOPIC_0053536933__p1183262615198"><a name="EN-US_TOPIC_0053536933__li98281626121911"></a><a name="li98281626121911"></a>Allows you to use your existing OS license. In such a case, you do not need to apply for a license again.</p>
</li></ul>
</li><li id="EN-US_TOPIC_0053536933__li17168121182016">Set <strong id="EN-US_TOPIC_0053536933__b18317665">Disk</strong>.<p id="EN-US_TOPIC_0053536933__p207711258162210">A BMS has one system disk and one or more data disks. You can add multiple data disks for a BMS and customize the system disk size.</p>
</li><li id="EN-US_TOPIC_0053536933__li17168121182016">Set <strong id="EN-US_TOPIC_0053536933__b87545579">Disk</strong>.<p id="EN-US_TOPIC_0053536933__p207711258162210">A BMS has one system disk and one or more data disks. You can add multiple data disks for a BMS and customize the system disk size.</p>
<ul id="EN-US_TOPIC_0053536933__ul19297175417229"><li id="EN-US_TOPIC_0053536933__li1830045412229">System disk<p id="EN-US_TOPIC_0053536933__p163041254182212"><a name="EN-US_TOPIC_0053536933__li1830045412229"></a><a name="li1830045412229"></a>If you select a flavor that supports quick provisioning, parameter <strong id="EN-US_TOPIC_0053536933__b1547951673219">System Disk</strong> is available. You can set the system disk type and size as needed.</p>
</li><li id="EN-US_TOPIC_0053536933__li23061054182219">Data disk<p id="EN-US_TOPIC_0053536933__p6309175452218"><a name="EN-US_TOPIC_0053536933__li23061054182219"></a><a name="li23061054182219"></a>You can add multiple data disks for a BMS and enable sharing for each data disk.</p>
<ul id="EN-US_TOPIC_0053536933__ul13335154812617"><li id="EN-US_TOPIC_0053536933__li1833574802618">Currently, BMSs only support SCSI disks.</li><li id="EN-US_TOPIC_0053536933__li147395542266"><strong id="EN-US_TOPIC_0053536933__b1339806449">Share</strong>: indicates that the EVS disk can be shared. A shared disk can be attached to multiple BMSs simultaneously.</li></ul>
<ul id="EN-US_TOPIC_0053536933__ul13335154812617"><li id="EN-US_TOPIC_0053536933__li1833574802618">Currently, BMSs only support SCSI disks.</li><li id="EN-US_TOPIC_0053536933__li147395542266"><strong id="EN-US_TOPIC_0053536933__b1984652029">Share</strong>: indicates that the EVS disk can be shared. A shared disk can be attached to multiple BMSs simultaneously.</li></ul>
</li></ul>
</li><li id="EN-US_TOPIC_0053536933__li18616483207">Set network parameters, including <strong id="EN-US_TOPIC_0053536933__b842352706193236">VPC</strong>, <strong id="EN-US_TOPIC_0053536933__b842352706193248">NIC</strong>, and <strong id="EN-US_TOPIC_0053536933__b842352706193244">Security Group</strong>.<p id="EN-US_TOPIC_0053536933__p1871465672617">When you use VPC for the first time, the system automatically creates a VPC for you, including the security group and NIC. The default subnet segment is 192.168.1.0/24 and the subnet gateway is 192.168.1.1. Dynamic Host Configuration Protocol (DHCP) is enabled for the subnet.</p>
@ -67,8 +67,8 @@
</td>
<td class="cellrowborder" valign="top" width="75.94999999999999%" headers="mcps1.3.3.2.10.5.2.3.1.2 "><p id="EN-US_TOPIC_0053536933__p12630162913549">An EIP is a static public IP address bound to a BMS in a VPC. Using the EIP, the BMS can access the Internet.</p>
<p id="EN-US_TOPIC_0053536933__p1963018299549">You can select one of the following three options for <strong id="EN-US_TOPIC_0053536933__b1240014596445">EIP</strong> as needed:</p>
<ul id="EN-US_TOPIC_0053536933__ul8445823113211"><li id="EN-US_TOPIC_0053536933__li13445123173215"><strong id="EN-US_TOPIC_0053536933__b84235270618401">Not required</strong>: The BMS cannot communicate with the Internet and can be used only on a private network for deploying services or used to deploy a cluster.</li><li id="EN-US_TOPIC_0053536933__li1038544310333"><strong id="EN-US_TOPIC_0053536933__b32847791">Automatically assign</strong>: The system automatically assigns an EIP with a dedicated bandwidth to the BMS. The bandwidth is configurable.</li><li id="EN-US_TOPIC_0053536933__li1886110913420"><strong id="EN-US_TOPIC_0053536933__b1272568065">Use existing</strong>: An existing EIP is assigned to the BMS.</li></ul>
<div class="note" id="EN-US_TOPIC_0053536933__note684184743013"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="EN-US_TOPIC_0053536933__p884134712300">If you select <strong id="EN-US_TOPIC_0053536933__b464876306">Use existing</strong>, you can create only one BMS at a time.</p>
<ul id="EN-US_TOPIC_0053536933__ul8445823113211"><li id="EN-US_TOPIC_0053536933__li13445123173215"><strong id="EN-US_TOPIC_0053536933__b84235270618401">Not required</strong>: The BMS cannot communicate with the Internet and can be used only on a private network for deploying services or used to deploy a cluster.</li><li id="EN-US_TOPIC_0053536933__li1038544310333"><strong id="EN-US_TOPIC_0053536933__b1152002764">Automatically assign</strong>: The system automatically assigns an EIP with a dedicated bandwidth to the BMS. The bandwidth is configurable.</li><li id="EN-US_TOPIC_0053536933__li1886110913420"><strong id="EN-US_TOPIC_0053536933__b1097968377">Use existing</strong>: An existing EIP is assigned to the BMS.</li></ul>
<div class="note" id="EN-US_TOPIC_0053536933__note684184743013"><span class="notetitle"> NOTE: </span><div class="notebody"><p id="EN-US_TOPIC_0053536933__p884134712300">If you select <strong id="EN-US_TOPIC_0053536933__b1959854195">Use existing</strong>, you can create only one BMS at a time.</p>
</div></div>
</td>
</tr>
@ -84,19 +84,19 @@
</li><li id="EN-US_TOPIC_0053536933__li104031930204712">Set the BMS login mode.<p id="EN-US_TOPIC_0053536933__p03539812418"><a name="EN-US_TOPIC_0053536933__li104031930204712"></a><a name="li104031930204712"></a><strong id="EN-US_TOPIC_0053536933__b842352706175824">Key pair</strong>: A key pair is used for BMS login authentication. You can select an existing key pair, or click <strong id="EN-US_TOPIC_0053536933__b1719019756141458">View Key Pair</strong> and create one.</p>
<div class="note" id="EN-US_TOPIC_0053536933__en-us_topic_0013859510_note56551667113428"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0053536933__en-us_topic_0013859510_p39202959113428">If you use an existing key pair, ensure that you have saved the key file locally. Otherwise, logging in to the BMS will fail.</p>
</div></div>
</li><li id="EN-US_TOPIC_0053536933__li996418351511">(Optional) Configure <strong id="EN-US_TOPIC_0053536933__b84235270618326">Advanced Settings</strong>.<p id="EN-US_TOPIC_0053536933__p28335510716">To use functions listed in <strong id="EN-US_TOPIC_0053536933__b1961440386">Advanced Settings</strong>, click <strong id="EN-US_TOPIC_0053536933__b1583960105">Configure now</strong>. Otherwise, click <strong id="EN-US_TOPIC_0053536933__b2098459211">Do not configure</strong>.</p>
<ul id="EN-US_TOPIC_0053536933__ul116731225193720"><li id="EN-US_TOPIC_0053536933__li119621227529"><strong id="EN-US_TOPIC_0053536933__b901955732">User Data Injection</strong> enables the BMS to automatically inject user data when the BMS starts for the first time. After this function is enabled, the BMS automatically injects user data upon its first startup.<p id="EN-US_TOPIC_0053536933__p1111643016214">This parameter is available only when <strong id="EN-US_TOPIC_0053536933__b164711185599">Key pair</strong> is selected for <strong id="EN-US_TOPIC_0053536933__b1564714189596">Login Mode</strong>. For detailed operations, see <a href="en-us_topic_0083737011.html">Injecting User Data</a>.</p>
</li><li id="EN-US_TOPIC_0053536933__li996418351511">(Optional) Configure <strong id="EN-US_TOPIC_0053536933__b84235270618326">Advanced Settings</strong>.<p id="EN-US_TOPIC_0053536933__p28335510716">To use functions listed in <strong id="EN-US_TOPIC_0053536933__b994003778">Advanced Settings</strong>, click <strong id="EN-US_TOPIC_0053536933__b986408440">Configure now</strong>. Otherwise, click <strong id="EN-US_TOPIC_0053536933__b544625378">Do not configure</strong>.</p>
<ul id="EN-US_TOPIC_0053536933__ul116731225193720"><li id="EN-US_TOPIC_0053536933__li119621227529"><strong id="EN-US_TOPIC_0053536933__b1484157166">User Data Injection</strong> enables the BMS to automatically inject user data when the BMS starts for the first time. After this function is enabled, the BMS automatically injects user data upon its first startup.<p id="EN-US_TOPIC_0053536933__p1111643016214">This parameter is available only when <strong id="EN-US_TOPIC_0053536933__b164711185599">Key pair</strong> is selected for <strong id="EN-US_TOPIC_0053536933__b1564714189596">Login Mode</strong>. For detailed operations, see <a href="en-us_topic_0083737011.html">Injecting User Data</a>.</p>
</li><li id="EN-US_TOPIC_0053536933__li1333112152913">(Optional) <strong id="EN-US_TOPIC_0053536933__b14410145810221">Tag</strong><p id="EN-US_TOPIC_0053536933__p1319043272912">Tagging BMSs helps you better identify and manage your BMSs. You can add up to nine tags to a BMS.</p>
<p id="EN-US_TOPIC_0053536933__p12560161113375">For detailed operations on tags, see <a href="en-us_topic_0110378367.html">Adding Tags</a>.</p>
</li><li id="EN-US_TOPIC_0053536933__li1262142573018"><strong id="EN-US_TOPIC_0053536933__b583818232310">Agency</strong><p id="EN-US_TOPIC_0053536933__p1650214615913">An agency provides BMSs with temporary security credentials for accessing other cloud services. The agency is created by the tenant administrator on the IAM console.</p>
<p id="EN-US_TOPIC_0053536933__p1991412369319">If you have created an agency in IAM, you can select the agency from the drop-down list. Currently, agencies are mainly used for server monitoring.</p>
</li></ul>
</li><li id="EN-US_TOPIC_0053536933__li1851494201">Set <strong id="EN-US_TOPIC_0053536933__b1378251254">BMS Name</strong>.<p id="EN-US_TOPIC_0053536933__p4210179488">The name can be customized but can contain only letters, digits, underscores (_), hyphens (-), and periods (.).</p>
</li><li id="EN-US_TOPIC_0053536933__li1851494201">Set <strong id="EN-US_TOPIC_0053536933__b6636633">BMS Name</strong>.<p id="EN-US_TOPIC_0053536933__p4210179488">The name can be customized but can contain only letters, digits, underscores (_), hyphens (-), and periods (.).</p>
<p id="EN-US_TOPIC_0053536933__p379613355205">If you create multiple BMSs at a time, suffixes will be added to the BMSs in sequence, such as <strong id="EN-US_TOPIC_0053536933__b3919103225917">bms-0001</strong>, <strong id="EN-US_TOPIC_0053536933__b791913285914">bms-0002</strong>, ... If you create multiple BMSs again, the values in the new BMS names increase from the existing maximum value. For example, the existing BMS with the maximum number in name is <strong id="EN-US_TOPIC_0053536933__b7836174445919">bms-0010</strong>. If you enter <strong id="EN-US_TOPIC_0053536933__b58364440599">bms</strong>, the names of the new BMSs will be <strong id="EN-US_TOPIC_0053536933__b283784419595">bms-0011</strong>, <strong id="EN-US_TOPIC_0053536933__b138379445595">bms-0012</strong>, .... When the value reaches 9999, it will start from 0001 again.</p>
</li><li id="EN-US_TOPIC_0053536933__li114913332216">Set your desired number of BMSs, which is a maximum of all available BMSs.<p id="EN-US_TOPIC_0053536933__p1799226143020"><a name="EN-US_TOPIC_0053536933__li114913332216"></a><a name="li114913332216"></a>After the configuration, click <strong id="EN-US_TOPIC_0053536933__en-us_topic_0013859510_b842352706175618">Price Calculator</strong> to view the BMS configuration fee.</p>
<div class="note" id="EN-US_TOPIC_0053536933__note615581382320"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0053536933__p1160915437579">If you manually set an IP address when configuring <strong id="EN-US_TOPIC_0053536933__b61551845103419">NIC</strong> or <strong id="EN-US_TOPIC_0053536933__b011594017341">High-Speed NIC</strong> or select <strong id="EN-US_TOPIC_0053536933__b17526443113815">Use existing</strong> when configuring <strong id="EN-US_TOPIC_0053536933__b18222103610">EIP</strong>, you can create only one BMS at a time.</p>
</div></div>
</li><li id="EN-US_TOPIC_0053536933__li16713132710242">Click <strong id="EN-US_TOPIC_0053536933__b2247948182217"></strong><strong id="EN-US_TOPIC_0053536933__b3247134862212">Allocate Now</strong>.</li><li id="EN-US_TOPIC_0053536933__li157151823142612">On the displayed page, confirm the specifications and click <strong id="EN-US_TOPIC_0053536933__b842352706165425">Submit</strong>.<p id="EN-US_TOPIC_0053536933__p2657125515269">The BMS status changes to <strong id="EN-US_TOPIC_0053536933__b1498600586">Running</strong> after about 30 minutes. If you select a flavor that supports quick provisioning, you can obtain a BMS within about five minutes.</p>
</li><li id="EN-US_TOPIC_0053536933__li16713132710242">Click <strong id="EN-US_TOPIC_0053536933__b2247948182217"></strong><strong id="EN-US_TOPIC_0053536933__b3247134862212">Allocate Now</strong>.</li><li id="EN-US_TOPIC_0053536933__li157151823142612">On the displayed page, confirm the specifications and click <strong id="EN-US_TOPIC_0053536933__b842352706165425">Submit</strong>.<p id="EN-US_TOPIC_0053536933__p2657125515269">The BMS status changes to <strong id="EN-US_TOPIC_0053536933__b777242417">Running</strong> after about 30 minutes. If you select a flavor that supports quick provisioning, you can obtain a BMS within about five minutes.</p>
<div class="note" id="EN-US_TOPIC_0053536933__note18816171442714"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0053536933__p134457577370">You can view the BMS creation status. For details, see <a href="en-us_topic_0053536924.html">Viewing BMS Creation Statuses</a>.</p>
</div></div>
</li></ol>

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<h1 class="topictitle1">Network</h1>
<div id="body1501333957803"><p id="EN-US_TOPIC_0069070105__p3850162811324">BMS provides four types of networks: VPC, high-speed network, user-defined VLAN, and IB network. They are isolated from each other.</p>
<p id="EN-US_TOPIC_0069070105__p988163713326">VPC and high-speed network interfaces are VLAN sub-interfaces created after system maintenance VLAN NICs are bonded. You can manage and configure NICs of user-defined VLANs and IB networks.</p>
<p id="EN-US_TOPIC_0069070105__p10763103712188">The QingtTian architecture improves the network performance and VPC NIC bonding provides high reliability.</p>
<p id="EN-US_TOPIC_0069070105__p10763103712188">The QingTian architecture improves the network performance and VPC NIC bonding provides high reliability.</p>
<div class="fignone" id="EN-US_TOPIC_0069070105__fig7937124915341"><span class="figcap"><b>Figure 1 </b>BMS networks</span><br><span><img class="vsd" id="EN-US_TOPIC_0069070105__image1393754923416" src="en-us_image_0160824210.png"></span></div>
<div class="note" id="EN-US_TOPIC_0069070105__note1745102211203"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0069070105__ul125853602018"><li id="EN-US_TOPIC_0069070105__li57372691041">In the preceding figure, ToR indicates the cabling mode in the server cabinet. The access switch is placed on top of the rack and the server is placed beneath it. HB indicates a high-speed network. QinQ indicates an 802.1Q tunnel.</li><li id="EN-US_TOPIC_0069070105__li202587365208">VPC and high-speed network interfaces are generated by the system and cannot be changed. They are configured in the same NIC bond.</li><li id="EN-US_TOPIC_0069070105__li3655588993148">BMSs can communicate with ECSs through VPCs or IB networks (if any).</li><li id="EN-US_TOPIC_0069070105__li970657693333">Only VPC supports security groups, EIPs, and ELB.</li><li id="EN-US_TOPIC_0069070105__li4041967493526">For a high-speed network and user-defined VLAN, BMSs in the same network communicate with each other only through layer-2 connections.</li></ul>
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</div>
<div class="section" id="EN-US_TOPIC_0075481008__section691873585116"><h4 class="sectiontitle">Possible Causes</h4><p id="EN-US_TOPIC_0075481008__p2529605085123">The BMS OS configuration does not allow remote login to the BMS.</p>
</div>
<div class="section" id="EN-US_TOPIC_0075481008__section26118472161749"><h4 class="sectiontitle">Solution</h4><p id="EN-US_TOPIC_0075481008__p4690522993243">Use a key pair to log in to the BMS and configure the OS as required. The configuration varies depending on the OS. The following part provides configurations of some OSs as examples. For details, see "Configuring Remote Login to a BMS" in <em id="EN-US_TOPIC_0075481008__i721010271560">Bare Metal Server Private Image Creation Guide</em>.</p>
<div class="section" id="EN-US_TOPIC_0075481008__section26118472161749"><h4 class="sectiontitle">Solution</h4><p id="EN-US_TOPIC_0075481008__p4690522993243">Use a key pair to log in to the BMS and configure the OS as required. The configuration varies depending on the OS. The following part provides configurations of some OSs as examples. For details, see "Configuring Remote Login to a BMS" in <em id="EN-US_TOPIC_0075481008__i12225322189">Bare Metal Server Private Image Creation Guide</em>.</p>
<ol id="EN-US_TOPIC_0075481008__ol64588493011"><li id="EN-US_TOPIC_0075481008__li14212932141220">Modify the configuration file.<ul id="EN-US_TOPIC_0075481008__ul1363913221148"><li id="EN-US_TOPIC_0075481008__li1664018229149">For SUSE Linux Enterprise Server 12 SP2, SUSE Linux Enterprise Server 12 SP1, Ubuntu 16.04 Server, CentOS Linux 7.3, and EulerOS 2.2, use the vi editor to open the <strong id="EN-US_TOPIC_0075481008__b84235270615236">/etc/default/grub</strong> file and add <strong id="EN-US_TOPIC_0075481008__b842352706152416">console=tty0 console=ttyS0</strong> after <strong id="EN-US_TOPIC_0075481008__b842352706152430">GRUB_CMDLINE_LINUX</strong>.<div class="fignone" id="EN-US_TOPIC_0075481008__fig27192519448"><span class="figcap"><b>Figure 1 </b>Example</span><br><span><img id="EN-US_TOPIC_0075481008__image372192524419" src="en-us_image_0284616130.png" title="Click to enlarge" class="imgResize"></span></div>
</li><li id="EN-US_TOPIC_0075481008__li5432930151619">For Oracle Linux 7.3 and Red Hat Enterprise Linux 7.3, use the vi editor to open the <strong id="EN-US_TOPIC_0075481008__b842352706152511">/etc/sysconfig/grub</strong> file and add <strong id="EN-US_TOPIC_0075481008__b842352706152526">console=tty0 console=ttyS0</strong> after <strong id="EN-US_TOPIC_0075481008__b842352706152536">GRUB_CMDLINE_LINUX</strong>.<div class="fignone" id="EN-US_TOPIC_0075481008__fig134251116114611"><span class="figcap"><b>Figure 2 </b>Example</span><br><span><img id="EN-US_TOPIC_0075481008__image104255160462" src="en-us_image_0284616133.png" title="Click to enlarge" class="imgResize"></span></div>
</li></ul>

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<div id="body1506434966225"><div class="section" id="EN-US_TOPIC_0078468105__section9787459153815"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0078468105__p1746716163919">You can create and register a private image using an external image file. <a href="#EN-US_TOPIC_0078468105__fig38131647453">Figure 1</a> shows the procedure.</p>
<div class="fignone" id="EN-US_TOPIC_0078468105__fig38131647453"><a name="EN-US_TOPIC_0078468105__fig38131647453"></a><a name="fig38131647453"></a><span class="figcap"><b>Figure 1 </b>Creating a private image from an external image file</span><br><span><img id="EN-US_TOPIC_0078468105__image178132471755" src="en-us_image_0260591452.png" title="Click to enlarge" class="imgResize"></span></div>
<p id="EN-US_TOPIC_0078468105__p426294114232">The procedure contains the following steps:</p>
<ol id="EN-US_TOPIC_0078468105__ol1081220142410"><li id="EN-US_TOPIC_0078468105__li88121903245">Prepare an image file. For details, see <em id="EN-US_TOPIC_0078468105__i55376111515">Bare Metal Server Private Image Creation Guide</em>.</li><li id="EN-US_TOPIC_0078468105__li468215221244">Upload the image file to your OBS bucket. For details, see <a href="#EN-US_TOPIC_0078468105__section175082275342">Upload an External Image File</a>.</li><li id="EN-US_TOPIC_0078468105__li5980165519274">On the management console, select the uploaded image file and register it as a private image. For details, see <a href="#EN-US_TOPIC_0078468105__section17202836566">Register a Private Image</a>.</li></ol>
<ol id="EN-US_TOPIC_0078468105__ol1081220142410"><li id="EN-US_TOPIC_0078468105__li88121903245">Prepare an image file. For details, see <em id="EN-US_TOPIC_0078468105__i10583134611501">Bare Metal Server Private Image Creation Guide</em>.</li><li id="EN-US_TOPIC_0078468105__li468215221244">Upload the image file to your OBS bucket. For details, see <a href="#EN-US_TOPIC_0078468105__section175082275342">Upload an External Image File</a>.</li><li id="EN-US_TOPIC_0078468105__li5980165519274">On the management console, select the uploaded image file and register it as a private image. For details, see <a href="#EN-US_TOPIC_0078468105__section17202836566">Register a Private Image</a>.</li></ol>
</div>
<div class="section" id="EN-US_TOPIC_0078468105__section175082275342"><a name="EN-US_TOPIC_0078468105__section175082275342"></a><a name="section175082275342"></a><h4 class="sectiontitle">Upload an External Image File</h4><p id="EN-US_TOPIC_0078468105__p18384369344">You can import an image file in VHD, VMDK, QCOW2, RAW, VHDX, QCOW, VDI, QED, ZVHD, or ZVHD2 format to create a private image.</p>
<p id="EN-US_TOPIC_0078468105__p207671947133913">Use OBS Browser to upload external image files. For details, see <em id="EN-US_TOPIC_0078468105__i27764336017">Object Storage Service User Guide</em>.</p>
<p id="EN-US_TOPIC_0078468105__p207671947133913">Use OBS Browser to upload external image files. For details, see <em id="EN-US_TOPIC_0078468105__i1240711559315">Object Storage Service User Guide</em>.</p>
<p id="EN-US_TOPIC_0078468105__p1244614170503">When uploading the external image file, you must select an OBS bucket with standard storage.</p>
</div>
<div class="section" id="EN-US_TOPIC_0078468105__section17202836566"><a name="EN-US_TOPIC_0078468105__section17202836566"></a><a name="section17202836566"></a><h4 class="sectiontitle">Register a Private Image</h4><ol id="EN-US_TOPIC_0078468105__ol5672144817506"><li id="EN-US_TOPIC_0078468105__li10711121911548">Log in to the management console.</li><li id="EN-US_TOPIC_0078468105__li1462714207575">Under <strong id="EN-US_TOPIC_0078468105__b141616145216">Computing</strong>, click <strong id="EN-US_TOPIC_0078468105__b323013529">Image Management Service</strong>.<p id="EN-US_TOPIC_0078468105__p137681833135711">The IMS console is displayed. </p>
@ -15,7 +15,7 @@
<ul id="EN-US_TOPIC_0078468105__ul13511122155920"><li id="EN-US_TOPIC_0078468105__li4393105143016"><strong id="EN-US_TOPIC_0078468105__b1015865421">Type</strong>: Select <strong id="EN-US_TOPIC_0078468105__b132160341727">System disk image</strong>.</li><li id="EN-US_TOPIC_0078468105__li1982635218328"><strong id="EN-US_TOPIC_0078468105__b25321198515">Source</strong>: Select <strong id="EN-US_TOPIC_0078468105__b069334019518">Image file</strong>.<p id="EN-US_TOPIC_0078468105__p528085319325">In the bucket list, select the bucket that stores the image file and select the image file.</p>
</li></ul>
<p id="EN-US_TOPIC_0078468105__p106841112193319"><strong id="EN-US_TOPIC_0078468105__b17694123617616">Image Information</strong></p>
<ul id="EN-US_TOPIC_0078468105__ul62781128123317"><li id="EN-US_TOPIC_0078468105__li627812803317"><strong id="EN-US_TOPIC_0078468105__b1639216431614">Function</strong>: Select <strong id="EN-US_TOPIC_0078468105__b977312120719">BMS system disk image</strong>.<p id="EN-US_TOPIC_0078468105__p124731643315">Ensure that you have completed initialization configuration on the image file by following the instructions in <em id="EN-US_TOPIC_0078468105__i1531113714367">Bare Metal Server Private Image Creation Guide</em>.</p>
<ul id="EN-US_TOPIC_0078468105__ul62781128123317"><li id="EN-US_TOPIC_0078468105__li627812803317"><strong id="EN-US_TOPIC_0078468105__b1639216431614">Function</strong>: Select <strong id="EN-US_TOPIC_0078468105__b977312120719">BMS system disk image</strong>.<p id="EN-US_TOPIC_0078468105__p124731643315">Ensure that you have completed initialization configuration on the image file by following the instructions in <em id="EN-US_TOPIC_0078468105__i62327265116">Bare Metal Server Private Image Creation Guide</em>.</p>
</li><li id="EN-US_TOPIC_0078468105__li12441035183415"><strong id="EN-US_TOPIC_0078468105__b1922961081118">OS</strong>: (Optional) Select the OS of the image file.<p id="EN-US_TOPIC_0078468105__p5781835153413">To ensure that the image can be created and used properly, select the OS consistent with that of the image file.</p>
</li><li id="EN-US_TOPIC_0078468105__li384184335914"><strong id="EN-US_TOPIC_0078468105__b19542257161213">System Disk (GB)</strong>: Set the system disk size. You are advised to set the value to the image system disk size plus 2 GB.</li><li id="EN-US_TOPIC_0078468105__li13771314171411"><strong id="EN-US_TOPIC_0078468105__b1603118132">Name</strong>: Enter a name for the image to be created. The value can contain only letters, digits, spaces, hyphens (-), underscores (_), and periods (.), and cannot start or end with a space.</li><li id="EN-US_TOPIC_0078468105__li17551011611"><strong id="EN-US_TOPIC_0078468105__b59711516209">Tag</strong>: (Optional) Add a tag to the image to identify and manage the image more easily.</li><li id="EN-US_TOPIC_0078468105__li157231514181811"><strong id="EN-US_TOPIC_0078468105__b1768417392216">Description</strong>: (Optional) Enter description of the image.</li></ul>
</li><li id="EN-US_TOPIC_0078468105__li39790319717">Click <strong id="EN-US_TOPIC_0078468105__b23531125153713"></strong><strong id="EN-US_TOPIC_0078468105__b173531125193713">Create Now</strong><strong id="EN-US_TOPIC_0078468105__b1735410256375"></strong>.<p id="EN-US_TOPIC_0078468105__p16221541499">On the displayed <strong id="EN-US_TOPIC_0078468105__b98118356376">Details</strong> page, confirm the configuration and click <strong id="EN-US_TOPIC_0078468105__b287173523712"></strong><strong id="EN-US_TOPIC_0078468105__b18733593711">Submit</strong><strong id="EN-US_TOPIC_0078468105__b11881935113711"></strong>.</p>

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@ -65,7 +65,7 @@ echo "Hello, the time is now $(date -R)" | tee /root/output.txt</pre>
<p id="EN-US_TOPIC_0083737011__p316665544119">After the BMS is created, start it and run the <strong id="EN-US_TOPIC_0083737011__b132256191307">cat </strong><em id="EN-US_TOPIC_0083737011__i346609220155733">[file]</em> command to check the script execution result.</p>
<pre class="screen" id="EN-US_TOPIC_0083737011__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_0083737011__p1849372719381"><strong id="EN-US_TOPIC_0083737011__b651005689">Example 2: Inject a Cloud-Config Data script.</strong></p>
<p id="EN-US_TOPIC_0083737011__p1849372719381"><strong id="EN-US_TOPIC_0083737011__b890599499">Example 2: Inject a Cloud-Config Data script.</strong></p>
<p id="EN-US_TOPIC_0083737011__p104921296416">When creating a BMS, set <strong id="EN-US_TOPIC_0083737011__b114231432124011">User Data</strong> to <strong id="EN-US_TOPIC_0083737011__b1042923204018">As Text</strong> and enter the user data script content.</p>
<pre class="screen" id="EN-US_TOPIC_0083737011__screen188011505456">#cloud-config
bootcmd:
@ -116,14 +116,14 @@ echo "Hello, BAT Test" &gt; C:\1111.txt</pre>
<p id="EN-US_TOPIC_0083737011__p98918311634">When creating a BMS, set <strong id="EN-US_TOPIC_0083737011__b78595543395">User Data</strong> to <strong id="EN-US_TOPIC_0083737011__b1085912543394">As Text</strong> and enter the user data script content.</p>
<pre class="screen" id="EN-US_TOPIC_0083737011__screen513912312149">#ps1
echo "Hello, Powershell Test" &gt; C:\aaaa.txt</pre>
<p id="EN-US_TOPIC_0083737011__p1264110811418">After the BMS is created, start it and check the script execution result. In this example, a text file named <strong id="EN-US_TOPIC_0083737011__b1114189478">aaaa</strong> is added to disk C:\.</p>
<p id="EN-US_TOPIC_0083737011__p1264110811418">After the BMS is created, start it and check the script execution result. In this example, a text file named <strong id="EN-US_TOPIC_0083737011__b1051389396">aaaa</strong> is added to disk C:\.</p>
<div class="fignone" id="EN-US_TOPIC_0083737011__fig103618447159"><span class="figcap"><b>Figure 5 </b>Text file aaaa.txt</span><br><span><img id="EN-US_TOPIC_0083737011__image18329152315154" src="en-us_image_0158694651.png" title="Click to enlarge" class="imgResize"></span></div>
<p id="EN-US_TOPIC_0083737011__p1433752314165">To view the user data injected into the Windows BMS, log in at http://169.254.169.254/openstack/latest/user_data.</p>
<div class="fignone" id="EN-US_TOPIC_0083737011__fig124617204176"><span class="figcap"><b>Figure 6 </b>Viewing user data in aaaa.txt</span><br><span><img id="EN-US_TOPIC_0083737011__image1779081310172" src="en-us_image_0158694652.jpg" title="Click to enlarge" class="imgResize"></span></div>
</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0083737011__section6298124315470"><h4 class="sectiontitle">Case 1</h4><p id="EN-US_TOPIC_0083737011__p198881544174711">This case illustrates how to inject user data so as to simplify BMS configuration.</p>
<p id="EN-US_TOPIC_0083737011__p62981134486">In this example, vim is configured to enable syntax highlighting, display line numbers, and set the tab stop to <strong id="EN-US_TOPIC_0083737011__b842352706203929">4</strong>. Configuration file <strong id="EN-US_TOPIC_0083737011__b842352706145011">.vimrc</strong> is created and injected into the <strong id="EN-US_TOPIC_0083737011__b842352706145017">/root/.vimrc</strong> directory during BMS creation. After the BMS is created, vim is automatically configured based on your requirements. This helps to improve BMS configuration efficiency, especially when you are creating ECSs in a batch.</p>
<p id="EN-US_TOPIC_0083737011__p62981134486">In this example, vim is configured to enable syntax highlighting, display line numbers, and set the tab stop to <strong id="EN-US_TOPIC_0083737011__b842352706203929">4</strong>. Configuration file <strong id="EN-US_TOPIC_0083737011__b842352706145011">.vimrc</strong> is created and injected into the <strong id="EN-US_TOPIC_0083737011__b842352706145017">/root/.vimrc</strong> directory during BMS creation. After the BMS is created, vim is automatically configured based on your requirements. This helps to improve BMS configuration efficiency, especially when you are creating BMSs in a batch.</p>
<p id="EN-US_TOPIC_0083737011__p194518613526">The script is as follows:</p>
<pre class="screen" id="EN-US_TOPIC_0083737011__screen65596078144036">#cloud-config
write_files:

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</div>
</li></ul>
</div>
<ul id="EN-US_TOPIC_0083745258__ul225313467013"><li id="EN-US_TOPIC_0083745258__li1352825412">I/O-optimized<p id="EN-US_TOPIC_0083745258__p83392279112"><a name="EN-US_TOPIC_0083745258__li1352825412"></a><a name="li1352825412"></a>This BMS type uses SSD disks as both the system and data disks and does not support cloud storage. It is ideal for services that require local high I/O storage or Intel SGX-based trusted execution environments (TEE).</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0083745258__table2991157718" frame="border" border="1" rules="all"><caption><b>Table 5 </b>I/O-optimized BMS specifications</caption><thead align="left"><tr id="EN-US_TOPIC_0083745258__row1499115711111"><th align="left" class="cellrowborder" valign="top" width="21.057894210578944%" id="mcps1.3.3.1.2.2.6.1.1"><p id="EN-US_TOPIC_0083745258__p59591224429">Flavor Name/ID</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="21.057894210578944%" id="mcps1.3.3.1.2.2.6.1.2"><p id="EN-US_TOPIC_0083745258__p1133471084816">CPU</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="21.057894210578944%" id="mcps1.3.3.1.2.2.6.1.3"><p id="EN-US_TOPIC_0083745258__p1533991024818">Memory</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="21.057894210578944%" id="mcps1.3.3.1.2.2.6.1.4"><p id="EN-US_TOPIC_0083745258__p63415102482">Local Disk</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="15.768423157684234%" id="mcps1.3.3.1.2.2.6.1.5"><p id="EN-US_TOPIC_0083745258__p4342410154815">Extended Configuration</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0083745258__row8992757512"><td class="cellrowborder" valign="top" width="21.057894210578944%" headers="mcps1.3.3.1.2.2.6.1.1 "><p id="EN-US_TOPIC_0083745258__p11298313717">physical.i7n.28xlarge.4</p>
</td>
<td class="cellrowborder" valign="top" width="21.057894210578944%" headers="mcps1.3.3.1.2.2.6.1.2 "><p id="EN-US_TOPIC_0083745258__p51291331675">2*28core Intel Icelake 6348 V6(</p>
<p id="EN-US_TOPIC_0083745258__p51299311476">2.6GHz,42MB Cache)</p>
</td>
<td class="cellrowborder" valign="top" width="21.057894210578944%" headers="mcps1.3.3.1.2.2.6.1.3 "><p id="EN-US_TOPIC_0083745258__p112923111713">DDR4 RAM (512 GB)</p>
</td>
<td class="cellrowborder" valign="top" width="21.057894210578944%" headers="mcps1.3.3.1.2.2.6.1.4 "><p id="EN-US_TOPIC_0083745258__p912919317718">2*960GB SATA SSD + 6*960GB SATA SSD</p>
</td>
<td class="cellrowborder" valign="top" width="15.768423157684234%" headers="mcps1.3.3.1.2.2.6.1.5 "><p id="EN-US_TOPIC_0083745258__p15129183115713">NIC: 2 x 25GE + 2 x 25GE</p>
</td>
</tr>
</tbody>
</table>
</div>
<div class="note" id="EN-US_TOPIC_0083745258__note3301193214117"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0083745258__ul78082337216"><li id="EN-US_TOPIC_0083745258__li1580818334215">BMS does not support auto scaling.</li><li id="EN-US_TOPIC_0083745258__li1580883320215">BMS supports public images, private images, and BYOL.</li><li id="EN-US_TOPIC_0083745258__li98081133925">BMS does not support RDS, ELB, MRS, CBR, or DNS.</li><li id="EN-US_TOPIC_0083745258__li98080331029">BMS only supports a single security group.</li></ul>
</div></div>
</li></ul>
</div>
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<div class="section" id="EN-US_TOPIC_0083745259__en-us_topic_0184026189_section193971112578"><h4 class="sectiontitle">Selecting an AZ</h4><p id="EN-US_TOPIC_0083745259__en-us_topic_0184026189_p859161416717">When deploying resources, consider your applications' requirements on disaster recovery (DR) and network latency.</p>
<ul id="EN-US_TOPIC_0083745259__en-us_topic_0184026189_ul157203571473"><li id="EN-US_TOPIC_0083745259__en-us_topic_0184026189_li7720175710711">For high DR capability, deploy resources in different AZs within the same region.</li><li id="EN-US_TOPIC_0083745259__en-us_topic_0184026189_li109763595719">For lower network latency, deploy resources in the same AZ.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0083745259__en-us_topic_0184026189_section1110135820407"><h4 class="sectiontitle">Regions and Endpoints</h4><p id="EN-US_TOPIC_0083745259__en-us_topic_0184026189_p361784821111">Before you use an API to call resources, specify its region and endpoint. For more details, see <a href="https://docs.otc.t-systems.com/en-us/endpoint/index.html" target="_blank" rel="noopener noreferrer">Regions and Endpoints</a>.</p>
<div class="section" id="EN-US_TOPIC_0083745259__en-us_topic_0184026189_section1110135820407"><h4 class="sectiontitle">Regions and Endpoints</h4><p id="EN-US_TOPIC_0083745259__en-us_topic_0184026189_p361784821111">Before you use an API to call resources, specify its region and endpoint. For more details, see <a href="https://docs.otc.t-systems.com/additional/endpoints.html" target="_blank" rel="noopener noreferrer">Regions and Endpoints</a>.</p>
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<p id="EN-US_TOPIC_0083745260__p1292710425411">Unlike traditional servers that can only use local disks, BMSs can use EVS disks that are not constrained by capacity. Shared EVS disks allow concurrent reads and writes by multiple BMSs, enabling you to deploy core applications in clusters.</p>
</div>
<div class="section" id="EN-US_TOPIC_0083745260__section589163701010"><h4 class="sectiontitle">EVS Disk Types</h4><p id="EN-US_TOPIC_0083745260__p1114004284319">BMSs support the following types of EVS disks:</p>
<ul id="EN-US_TOPIC_0083745260__ul2784123016155"><li id="EN-US_TOPIC_0083745260__li1178483017158">Common I/O: This EVS disk type delivers a maximum of 1000 IOPS. It is ideal for application scenarios that require large capacity, medium read/write speed, and fewer transactions, such as enterprise applications and small-scale testing.</li><li id="EN-US_TOPIC_0083745260__li1784103018157">High I/O: This EVS disk type delivers a maximum of 3000 IOPS and a minimum of 6 ms read/write latency. It is designed to meet the needs of mainstream high-performance, high-reliability application scenarios, such as enterprise applications, large-scale development and testing, and web server logs.</li><li id="EN-US_TOPIC_0083745260__li1878513304158">Ultra-high I/O: This EVS disk type delivers a maximum of 20,000 IOPS and a minimum of 1 ms read/write latency. It is excellent for ultra-high I/O, ultra-high bandwidth, and read/write-intensive application scenarios, such as distributed file systems in HPC or NoSQL/RDS in I/O-intensive scenarios.</li><li id="EN-US_TOPIC_0083745260__li197051139204215">Extreme SSD: This EVS disk type delivers up to 128,000 IOPS and sub-millisecond read latencies. With RDMA integrated with low-latency congestion control algorithms, this disk type is suitable for application scenarios that require ultra-high bandwidth and ultra-low latency.</li></ul>
<ul id="EN-US_TOPIC_0083745260__ul2784123016155"><li id="EN-US_TOPIC_0083745260__li1178483017158">Common I/O: This EVS disk type delivers a maximum of 1000 IOPS. It is ideal for application scenarios that require large capacity, medium read/write speed, and fewer transactions, such as enterprise applications and small-scale testing.</li><li id="EN-US_TOPIC_0083745260__li1784103018157">High I/O: This EVS disk type delivers a maximum of 3,000 IOPS and a minimum of 6 ms read/write latency. It is designed to meet the needs of mainstream high-performance, high-reliability application scenarios, such as enterprise applications, large-scale development and testing, and web server logs.</li><li id="EN-US_TOPIC_0083745260__li1878513304158">Ultra-high I/O: This EVS disk type delivers a maximum of 20,000 IOPS and a minimum of 1 ms read/write latency. It is excellent for ultra-high I/O, ultra-high bandwidth, and read/write-intensive application scenarios, such as distributed file systems in HPC or NoSQL/RDS in I/O-intensive scenarios.</li><li id="EN-US_TOPIC_0083745260__li197051139204215">Extreme SSD: This EVS disk type delivers up to 128,000 IOPS and sub-millisecond read latencies. With RDMA integrated with low-latency congestion control algorithms, this disk type is suitable for application scenarios that require ultra-high bandwidth and ultra-low latency.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0083745260__section156512755611"><h4 class="sectiontitle">EVS Disk Performance</h4><p id="EN-US_TOPIC_0083745260__p5219153215613">The key indicators of EVS disk performance include read/write latency, IOPS, and throughput.</p>
<ul id="EN-US_TOPIC_0083745260__ul54942712165743"><li id="EN-US_TOPIC_0083745260__li58016212165743">IOPS: number of read/write operations performed by an EVS disk per second</li><li id="EN-US_TOPIC_0083745260__li5135502516586">Throughput: amount of data successfully transmitted by an EVS disk per second, that is, the amount of data read from and written into an EVS disk</li><li id="EN-US_TOPIC_0083745260__li15471431151012">Read/write latency: minimum interval between two consecutive read/write operations of an EVS disk</li></ul>
<p id="EN-US_TOPIC_0083745260__p2518192319579">For more details, see <em id="EN-US_TOPIC_0083745260__i64673367426">Elastic Volume Service User Guide</em>.</p>
<p id="EN-US_TOPIC_0083745260__p2518192319579">For more details, see <em id="EN-US_TOPIC_0083745260__i128011828587">Elastic Volume Service User Guide</em>.</p>
</div>
<div class="section" id="EN-US_TOPIC_0083745260__section139751861558"><h4 class="sectiontitle">EVS Disk Device Types</h4><p id="EN-US_TOPIC_0083745260__p3490482555">BMS supports only Small Computer System Interface (SCSI) EVS disks.</p>
<p id="EN-US_TOPIC_0083745260__p12226328195814">On the management console, you can create EVS disks with <strong id="EN-US_TOPIC_0083745260__b842352706145311">Device Type</strong> set to <strong id="EN-US_TOPIC_0083745260__b202375965913">SCSI</strong>. The EVS disks support transparent SCSI command transmission, allowing BMS OSs to directly access underlying storage media. The EVS disks support basic read/write SCSI commands and advanced SCSI commands.</p>
<div class="note" id="EN-US_TOPIC_0083745260__note19575183103220"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0083745260__p1757519316324">BMS public image OSs are preinstalled with the driver required to use SCSI disks, so you do not need to install the driver. To know how to install the driver, see "Installing the SDI Card Driver" in <em id="EN-US_TOPIC_0083745260__i665043015471">Bare Metal Server Private Image Creation Guide</em>.</p>
<div class="note" id="EN-US_TOPIC_0083745260__note19575183103220"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0083745260__p1757519316324">BMS public image OSs are preinstalled with the driver required to use SCSI disks, so you do not need to install the driver. To know how to install the driver, see "Installing the SDI Card Driver" in <em id="EN-US_TOPIC_0083745260__i1841335455">Bare Metal Server Private Image Creation Guide</em>.</p>
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<div class="section" id="EN-US_TOPIC_0083745263__section528893335315"><h4 class="sectiontitle">Impact on IMS</h4><p id="EN-US_TOPIC_0083745263__p1084623495317">To ensure that BMSs you create using private images support customized configurations, you must install Cloud-Init or Cloudbase-Init when you create private images.</p>
<ul id="EN-US_TOPIC_0083745263__ul519862711568"><li id="EN-US_TOPIC_0083745263__li1419815276569">For Windows OSs, download and install Cloudbase-Init.</li><li id="EN-US_TOPIC_0083745263__li74263495569">For Linux OSs, download and install Cloud-Init.</li></ul>
<p id="EN-US_TOPIC_0083745263__p82481922165611">After Cloud-Init or Cloudbase-Init is installed in an image, Cloud-Init or Cloudbase-Init will automatically initialize the BMS that created from the image. For details about how to install Cloud-Init and Cloudbase-Init, see <em id="EN-US_TOPIC_0083745263__i198721348577">Bare Metal Server Private Image Creation Guide</em>.</p>
<p id="EN-US_TOPIC_0083745263__p82481922165611">After Cloud-Init or Cloudbase-Init is installed in an image, Cloud-Init or Cloudbase-Init will automatically initialize the BMS that created from the image. For details about how to install Cloud-Init and Cloudbase-Init, see <em id="EN-US_TOPIC_0083745263__i1330219488366">Bare Metal Server Private Image Creation Guide</em>.</p>
</div>
<div class="section" id="EN-US_TOPIC_0083745263__section951214112013"><h4 class="sectiontitle">Impact on BMS</h4><ul id="EN-US_TOPIC_0083745263__ul565562811016"><li id="EN-US_TOPIC_0083745263__li36553281003">When you create a BMS, if Cloud-Init has been installed in the image you select, you can initialize the BMS by injecting customized configurations (such as the BMS login password) into it. For details, see <a href="en-us_topic_0083737011.html">Injecting User Data</a>.</li><li id="EN-US_TOPIC_0083745263__li1232313141316">For a BMS with Cloud-Init installed, you can view the BMS metadata and configure and manage the BMS. For more information, see <a href="en-us_topic_0096279463.html">Retrieving Metadata</a>.</li></ul>
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<a name="EN-US_TOPIC_0083745264"></a><a name="EN-US_TOPIC_0083745264"></a>
<h1 class="topictitle1">Security Group</h1>
<div id="body1510649203641"><div class="section" id="EN-US_TOPIC_0083745264__section5671748165410"><h4 class="sectiontitle">What Is a Security Group?</h4><p id="EN-US_TOPIC_0083745264__p4326812174820">A security group is a virtual firewall that detects status and filters data packets. It is an important network isolation method used to set access control for ECSs, BMSs, load balancers, and database instances.</p>
<p id="EN-US_TOPIC_0083745264__p551951234812">You can configure security group rules to allow instances in a security group to access the public or private network.</p>
<ul id="EN-US_TOPIC_0083745264__ul768810587546"><li id="EN-US_TOPIC_0083745264__li04307175490">A security group is a logical group. You can add BMSs that have the same security protection requirements within a region to the same security group.</li><li id="EN-US_TOPIC_0083745264__li1788114111544">By default, BMSs in the same security group can communicate with each other through an internal network, whereas BMSs in different security groups cannot.</li><li id="EN-US_TOPIC_0083745264__li9688758195416">You can modify a security group rule at any time, and the modification takes effect immediately.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0083745264__section7270549185510"><h4 class="sectiontitle">Default Security Group</h4><p id="EN-US_TOPIC_0083745264__p292815085511">When you create a BMS in a region, the system will create a default security group if no security group exists in the region.</p>
<p id="EN-US_TOPIC_0083745264__p22891251233">The default security group rule allows all outgoing data packets and blocks incoming data packets. BMSs in this security group can access each other already. You do not need to add additional rules.</p>
<div class="fignone" id="EN-US_TOPIC_0083745264__fig864956103515"><span class="figcap"><b>Figure 1 </b>Default security group</span><br><span><img id="EN-US_TOPIC_0083745264__image106499616355" src="en-us_image_0287158389.png"></span></div>
<p id="EN-US_TOPIC_0083745264__p14718937344"><a href="#EN-US_TOPIC_0083745264__table57441530644">Table 1</a> lists the rules for a default security group.</p>
<div class="tablenoborder"><a name="EN-US_TOPIC_0083745264__table57441530644"></a><a name="table57441530644"></a><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0083745264__table57441530644" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Default security group rules</caption><thead align="left"><tr id="EN-US_TOPIC_0083745264__row87461030648"><th align="left" class="cellrowborder" valign="top" width="13.639999999999999%" id="mcps1.3.2.6.2.6.1.1"><p id="EN-US_TOPIC_0083745264__p974620306420">Direction</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="13.530000000000001%" id="mcps1.3.2.6.2.6.1.2"><p id="EN-US_TOPIC_0083745264__p1474683019414">Protocol</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="14.360000000000001%" id="mcps1.3.2.6.2.6.1.3"><p id="EN-US_TOPIC_0083745264__p1674620305413">Port Range</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="23%" id="mcps1.3.2.6.2.6.1.4"><p id="EN-US_TOPIC_0083745264__p17461130343">Source/Destination</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="35.47%" id="mcps1.3.2.6.2.6.1.5"><p id="EN-US_TOPIC_0083745264__p1474683010413">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0083745264__row674616301415"><td class="cellrowborder" valign="top" width="13.639999999999999%" headers="mcps1.3.2.6.2.6.1.1 "><p id="EN-US_TOPIC_0083745264__p774610301047">Outbound</p>
</td>
<td class="cellrowborder" valign="top" width="13.530000000000001%" headers="mcps1.3.2.6.2.6.1.2 "><p id="EN-US_TOPIC_0083745264__p674613011415">All</p>
</td>
<td class="cellrowborder" valign="top" width="14.360000000000001%" headers="mcps1.3.2.6.2.6.1.3 "><p id="EN-US_TOPIC_0083745264__p0746113016418">All</p>
</td>
<td class="cellrowborder" valign="top" width="23%" headers="mcps1.3.2.6.2.6.1.4 "><p id="EN-US_TOPIC_0083745264__p1774612307416">Destination: 0.0.0.0/0</p>
</td>
<td class="cellrowborder" valign="top" width="35.47%" headers="mcps1.3.2.6.2.6.1.5 "><p id="EN-US_TOPIC_0083745264__p1074673014417">Allows all outbound traffic.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0083745264__row147461630449"><td class="cellrowborder" valign="top" width="13.639999999999999%" headers="mcps1.3.2.6.2.6.1.1 "><p id="EN-US_TOPIC_0083745264__p157464301342">Inbound</p>
</td>
<td class="cellrowborder" valign="top" width="13.530000000000001%" headers="mcps1.3.2.6.2.6.1.2 "><p id="EN-US_TOPIC_0083745264__p107460302413">All</p>
</td>
<td class="cellrowborder" valign="top" width="14.360000000000001%" headers="mcps1.3.2.6.2.6.1.3 "><p id="EN-US_TOPIC_0083745264__p1974610305413">All</p>
</td>
<td class="cellrowborder" valign="top" width="23%" headers="mcps1.3.2.6.2.6.1.4 "><p id="EN-US_TOPIC_0083745264__p57461430147">Source: current security group ID (for example, sg-<em id="EN-US_TOPIC_0083745264__i19385142014618">xxxxx</em>)</p>
</td>
<td class="cellrowborder" valign="top" width="35.47%" headers="mcps1.3.2.6.2.6.1.5 "><p id="EN-US_TOPIC_0083745264__p207462308411">Allows inbound traffic from BMSs in the same security group.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0083745264__row174653015415"><td class="cellrowborder" valign="top" width="13.639999999999999%" headers="mcps1.3.2.6.2.6.1.1 "><p id="EN-US_TOPIC_0083745264__p10747330547">Inbound</p>
</td>
<td class="cellrowborder" valign="top" width="13.530000000000001%" headers="mcps1.3.2.6.2.6.1.2 "><p id="EN-US_TOPIC_0083745264__p87471130740">TCP</p>
</td>
<td class="cellrowborder" valign="top" width="14.360000000000001%" headers="mcps1.3.2.6.2.6.1.3 "><p id="EN-US_TOPIC_0083745264__p1474783018411">22</p>
</td>
<td class="cellrowborder" valign="top" width="23%" headers="mcps1.3.2.6.2.6.1.4 "><p id="EN-US_TOPIC_0083745264__p27475302049">Source: 0.0.0.0/0</p>
</td>
<td class="cellrowborder" valign="top" width="35.47%" headers="mcps1.3.2.6.2.6.1.5 "><p id="EN-US_TOPIC_0083745264__p7747103017410">Allows all IP addresses to access Linux BMSs over SSH.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0083745264__row117470305417"><td class="cellrowborder" valign="top" width="13.639999999999999%" headers="mcps1.3.2.6.2.6.1.1 "><p id="EN-US_TOPIC_0083745264__p4747113011410">Inbound</p>
</td>
<td class="cellrowborder" valign="top" width="13.530000000000001%" headers="mcps1.3.2.6.2.6.1.2 "><p id="EN-US_TOPIC_0083745264__p1774720308415">TCP</p>
</td>
<td class="cellrowborder" valign="top" width="14.360000000000001%" headers="mcps1.3.2.6.2.6.1.3 "><p id="EN-US_TOPIC_0083745264__p107475301546">3389</p>
</td>
<td class="cellrowborder" valign="top" width="23%" headers="mcps1.3.2.6.2.6.1.4 "><p id="EN-US_TOPIC_0083745264__p12747163013419">Source: 0.0.0.0/0</p>
</td>
<td class="cellrowborder" valign="top" width="35.47%" headers="mcps1.3.2.6.2.6.1.5 "><p id="EN-US_TOPIC_0083745264__p1574714301943">Allows all IP addresses to access Windows BMSs over RDP.</p>
</td>
</tr>
</tbody>
</table>
</div>
<p id="EN-US_TOPIC_0083745264__p9888021161310">For more information, see <em id="EN-US_TOPIC_0083745264__i922616296560">Virtual Private Cloud User Guide</em>.</p>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0102159482.html">Security</a></div>
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<ul class="ullinks">
<li class="ulchildlink"><strong><a href="en-us_topic_0078758302.html">Installing and Configuring Agent</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0084461768.html">Supported Monitoring Metrics (with Agent Installed)</a></strong><br>
<li class="ulchildlink"><strong><a href="en-us_topic_0084461768.html">Monitored Metrics (with Agent Installed)</a></strong><br>
</li>
</ul>
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<a name="EN-US_TOPIC_0084461768"></a><a name="EN-US_TOPIC_0084461768"></a>
<h1 class="topictitle1">Supported Monitoring Metrics (with Agent Installed)</h1>
<h1 class="topictitle1">Monitored Metrics (with Agent Installed)</h1>
<div id="body1511076384392"><div class="section" id="EN-US_TOPIC_0084461768__en-us_topic_0107606742_section1233112278019"><h4 class="sectiontitle">Description</h4><p id="EN-US_TOPIC_0084461768__en-us_topic_0107606742_p277742815016">This section describes monitoring metrics reported by BMS to Cloud Eye as well as their namespaces and dimensions. You can use the management console or APIs provided by Cloud Eye to query the metrics of the monitored objects and alarms generated for BMS.</p>
<div class="note" id="EN-US_TOPIC_0084461768__en-us_topic_0107606742_note1593711522"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0084461768__en-us_topic_0107606742_p39812186511">After installing the Agent on a BMS, you can view its OS monitoring metrics. Monitoring data is collected at an interval of 1 minute.</p>
</div></div>
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</td>
<td class="cellrowborder" valign="top" width="34.660000000000004%" headers="mcps1.3.3.4.2.7.1.3 "><p id="EN-US_TOPIC_0084461768__en-us_topic_0107606742_en-us_topic_0104704449_p19781246114915">Percentage of time that the CPU is used by kernel space</p>
<p id="EN-US_TOPIC_0084461768__en-us_topic_0107606742_en-us_topic_0104704449_p0978134644916">Check the metric value changes in the <strong id="EN-US_TOPIC_0084461768__b8837029105013">/proc/stat</strong> file in a collection period.</p>
<p id="EN-US_TOPIC_0084461768__en-us_topic_0107606742_en-us_topic_0104704449_p9978184613492">Run the <strong id="EN-US_TOPIC_0084461768__b14586542">top</strong> command to check the <strong id="EN-US_TOPIC_0084461768__b445835769">%Cpu(s) sy</strong> value.</p>
<p id="EN-US_TOPIC_0084461768__en-us_topic_0107606742_en-us_topic_0104704449_p9978184613492">Run the <strong id="EN-US_TOPIC_0084461768__b370891541">top</strong> command to check the <strong id="EN-US_TOPIC_0084461768__b62826918">%Cpu(s) sy</strong> value.</p>
<p id="EN-US_TOPIC_0084461768__en-us_topic_0107606742_p1259919133513">Unit: percent</p>
</td>
<td class="cellrowborder" valign="top" width="9.120000000000001%" headers="mcps1.3.3.4.2.7.1.4 "><p id="EN-US_TOPIC_0084461768__en-us_topic_0107606742_p1758603923418">0-100%</p>
@ -382,7 +382,7 @@
<td class="cellrowborder" valign="top" width="17.331733173317332%" headers="mcps1.3.3.7.2.7.1.2 "><p id="EN-US_TOPIC_0084461768__en-us_topic_0107606742_en-us_topic_0104704449_p839018338516">(Agent) Used Disk Space</p>
</td>
<td class="cellrowborder" valign="top" width="34.713471347134714%" headers="mcps1.3.3.7.2.7.1.3 "><p id="EN-US_TOPIC_0084461768__en-us_topic_0107606742_en-us_topic_0104704449_p13390113385119">Used disk space of the monitored object</p>
<p id="EN-US_TOPIC_0084461768__en-us_topic_0107606742_en-us_topic_0104704449_p1839083310512">Run the <strong id="EN-US_TOPIC_0084461768__b757150177">df -h</strong> command to check the data in the <strong id="EN-US_TOPIC_0084461768__b70037967">Used</strong> column.</p>
<p id="EN-US_TOPIC_0084461768__en-us_topic_0107606742_en-us_topic_0104704449_p1839083310512">Run the <strong id="EN-US_TOPIC_0084461768__b29000479">df -h</strong> command to check the data in the <strong id="EN-US_TOPIC_0084461768__b1523544233">Used</strong> column.</p>
<p id="EN-US_TOPIC_0084461768__en-us_topic_0107606742_p13875212218">The path of the mount point prefix cannot exceed 64 characters. It must start with a letter, and contain only digits, letters, hyphens (-), dots (.), and swung dashes (~).</p>
<p id="EN-US_TOPIC_0084461768__en-us_topic_0107606742_p8711162973819">Unit: GB</p>
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<h1 class="topictitle1">Creating a Private Image from a BMS</h1>
<div id="body1511253909455"><div class="section" id="EN-US_TOPIC_0084807532__section9787459153815"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0084807532__p1688711437212">You can create a private image from a BMS and copy the system disk data of the BMS to the private image. The system disk contains an OS and pre-installed applications for running services.</p>
</div>
<div class="section" id="EN-US_TOPIC_0084807532__section036311301271"><h4 class="sectiontitle">Constraints</h4><ul id="EN-US_TOPIC_0084807532__ul28769361274"><li id="EN-US_TOPIC_0084807532__li16876163618713">This operation is supported only when the system disk is an EVS disk.</li><li id="EN-US_TOPIC_0084807532__li422917441877">Data disks of a BMS cannot be exported as images.</li><li id="EN-US_TOPIC_0084807532__li191731850273">The BMS must be stopped.</li><li id="EN-US_TOPIC_0084807532__li819331114238">This operation depends on the bms-network-config and Cloud-Init plug-ins in the BMS image.<ul id="EN-US_TOPIC_0084807532__ul37602276236"><li id="EN-US_TOPIC_0084807532__li107609270236">If the BMS is created using a public image, the image has the bms-network-config and Cloud-Init plug-ins by default.</li><li id="EN-US_TOPIC_0084807532__li1649403972316">If the BMS is created using a private image, check whether bms-network-config and Cloud-Init are installed by following the instructions in <em id="EN-US_TOPIC_0084807532__i1011814534308">Bare Metal Server Private Image Creation Guide</em>.</li></ul>
<div class="section" id="EN-US_TOPIC_0084807532__section036311301271"><h4 class="sectiontitle">Constraints</h4><ul id="EN-US_TOPIC_0084807532__ul28769361274"><li id="EN-US_TOPIC_0084807532__li16876163618713">This operation is supported only when the system disk is an EVS disk.</li><li id="EN-US_TOPIC_0084807532__li422917441877">Data disks of a BMS cannot be exported as images.</li><li id="EN-US_TOPIC_0084807532__li191731850273">The BMS must be stopped.</li><li id="EN-US_TOPIC_0084807532__li819331114238">This operation depends on the bms-network-config and Cloud-Init plug-ins in the BMS image.<ul id="EN-US_TOPIC_0084807532__ul37602276236"><li id="EN-US_TOPIC_0084807532__li107609270236">If the BMS is created using a public image, the image has the bms-network-config and Cloud-Init plug-ins by default.</li><li id="EN-US_TOPIC_0084807532__li1649403972316">If the BMS is created using a private image, check whether bms-network-config and Cloud-Init are installed by following the instructions in <em id="EN-US_TOPIC_0084807532__i8138514817">Bare Metal Server Private Image Creation Guide</em>.</li></ul>
</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0084807532__section443273503917"><h4 class="sectiontitle">Precautions</h4><ul id="EN-US_TOPIC_0084807532__ul194231249161916"><li id="EN-US_TOPIC_0084807532__li4671152711">Delete sensitive data from the BMS before using it to creating a private image to prevent data leak.</li><li id="EN-US_TOPIC_0084807532__li148854319432">Delete residual files from the OS. For details, see "Deleting Files" in <em id="EN-US_TOPIC_0084807532__i1451383415312">Bare Metal Server Private Image Creation Guide</em>.</li><li id="EN-US_TOPIC_0084807532__li15423349111919">During the image creation process, do not change the BMS status. Otherwise, the image will fail to be created.</li></ul>
<div class="section" id="EN-US_TOPIC_0084807532__section443273503917"><h4 class="sectiontitle">Precautions</h4><ul id="EN-US_TOPIC_0084807532__ul194231249161916"><li id="EN-US_TOPIC_0084807532__li4671152711">Delete sensitive data from the BMS before using it to creating a private image to prevent data leak.</li><li id="EN-US_TOPIC_0084807532__li148854319432">Delete residual files from the OS. For details, see "Deleting Files" in <em id="EN-US_TOPIC_0084807532__i210104454916">Bare Metal Server Private Image Creation Guide</em>.</li><li id="EN-US_TOPIC_0084807532__li15423349111919">During the image creation process, do not change the BMS status. Otherwise, the image will fail to be created.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0084807532__section183213224212"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0084807532__ol1295193013589"><li id="EN-US_TOPIC_0084807532__li10711121911548">Log in to the management console.</li><li id="EN-US_TOPIC_0084807532__li969810464567">Under <strong id="EN-US_TOPIC_0084807532__en-us_topic_0053536924_b1134469344202623">Computing</strong>, click <strong id="EN-US_TOPIC_0084807532__en-us_topic_0053536924_b856921432202623">Bare Metal Server</strong>.<p id="EN-US_TOPIC_0084807532__en-us_topic_0053536924_p127731959141113">The BMS console is displayed.</p>
</li><li id="EN-US_TOPIC_0084807532__li05731571717">Locate the row that contains the target BMS, click <strong id="EN-US_TOPIC_0084807532__b842352706215333">More</strong> in the <strong id="EN-US_TOPIC_0084807532__b842352706215337">Operation</strong> column, and select <strong id="EN-US_TOPIC_0084807532__b842352706215343">Stop</strong> from the drop-down list.<p id="EN-US_TOPIC_0084807532__p312322017115">Only a BMS in stopped state can be used to create a private image.</p>

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<ul class="ullinks">
<li class="ulchildlink"><strong><a href="en-us_topic_0083745262.html">License Type</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0083745264.html">Security Group</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0083745263.html">Cloud-Init</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0140735214.html">Key Pair</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="en-us_topic_0147508514.html">Access Control</a></strong><br>
<li class="ulchildlink"><strong><a href="en-us_topic_0147508514.html">Identity Authentication and Access Control</a></strong><br>
</li>
</ul>

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<div class="section" id="EN-US_TOPIC_0102427987__section52421843111514"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0102427987__ol1662752015169"><li id="EN-US_TOPIC_0102427987__li10711121911548">Log in to the management console.</li><li id="EN-US_TOPIC_0102427987__li969810464567">Under <strong id="EN-US_TOPIC_0102427987__en-us_topic_0053536924_b1134469344202623">Computing</strong>, click <strong id="EN-US_TOPIC_0102427987__en-us_topic_0053536924_b856921432202623">Bare Metal Server</strong>.<p id="EN-US_TOPIC_0102427987__en-us_topic_0053536924_p127731959141113">The BMS console is displayed.</p>
</li><li id="EN-US_TOPIC_0102427987__li17143459143113">In the upper right corner of the BMS list, enter the name, private IP address, ID, or flavor of a BMS and click <span><img id="EN-US_TOPIC_0102427987__image6144205917319" src="en-us_image_0102459954.png"></span> to search for the desired BMS.</li><li id="EN-US_TOPIC_0102427987__li4144155920313">Click the name of the target BMS.<p id="EN-US_TOPIC_0102427987__p18144205916319"><a name="EN-US_TOPIC_0102427987__li4144155920313"></a><a name="li4144155920313"></a>The page showing details of the BMS is displayed.</p>
</li><li id="EN-US_TOPIC_0102427987__li1114425923112">Click the <strong id="EN-US_TOPIC_0102427987__b3166031238574">Disks</strong> tab. Then, click <strong id="EN-US_TOPIC_0102427987__b62538178185745">Attach Disk</strong>.<p id="EN-US_TOPIC_0102427987__p3144159153115">The <strong id="EN-US_TOPIC_0102427987__b84235270622427">Attach Disk</strong> dialog box is displayed.</p>
</li><li id="EN-US_TOPIC_0102427987__li265213223205">Select the disk type and target disk, and set the mount point as prompted.<div class="note" id="EN-US_TOPIC_0102427987__note975811323213"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0102427987__p143641130142812">If no EVS disks are available, click <strong id="EN-US_TOPIC_0102427987__b1021317501">Create Disk</strong> in the lower part of the list.</p>
</li><li id="EN-US_TOPIC_0102427987__li265213223205">Select the disk type and target disk, and set the mount point as prompted.<div class="note" id="EN-US_TOPIC_0102427987__note975811323213"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0102427987__p143641130142812">If no EVS disks are available, click <strong id="EN-US_TOPIC_0102427987__b259543454">Create Disk</strong> in the lower part of the list.</p>
</div></div>
</li><li id="EN-US_TOPIC_0102427987__li114751027112119">Click <strong id="EN-US_TOPIC_0102427987__b84235270611855">OK</strong>.<p id="EN-US_TOPIC_0102427987__p3368171218302">After the disk is attached, you can view the information about it on the <strong id="EN-US_TOPIC_0102427987__b842352706221346">Disks</strong> tab.</p>
</li></ol>

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<p id="EN-US_TOPIC_0110378367__p773716268254">You can add tags to a BMS in either of the following ways:</p>
<ul id="EN-US_TOPIC_0110378367__ul892185642713"><li id="EN-US_TOPIC_0110378367__li159245682718"><a href="#EN-US_TOPIC_0110378367__section125012913114">Add Tags During BMS Creation</a></li><li id="EN-US_TOPIC_0110378367__li497196132810"><a href="#EN-US_TOPIC_0110378367__section14780204519234">Add Tags on the BMS Details Page</a></li></ul>
<div class="section" id="EN-US_TOPIC_0110378367__section125012913114"><a name="EN-US_TOPIC_0110378367__section125012913114"></a><a name="section125012913114"></a><h4 class="sectiontitle">Add Tags During BMS Creation</h4><ol id="EN-US_TOPIC_0110378367__ol977719412512"><li id="EN-US_TOPIC_0110378367__li10711121911548">Log in to the management console.</li><li id="EN-US_TOPIC_0110378367__li969810464567">Under <strong id="EN-US_TOPIC_0110378367__en-us_topic_0053536924_b1134469344202623">Computing</strong>, click <strong id="EN-US_TOPIC_0110378367__en-us_topic_0053536924_b856921432202623">Bare Metal Server</strong>.<p id="EN-US_TOPIC_0110378367__en-us_topic_0053536924_p127731959141113">The BMS console is displayed.</p>
</li><li id="EN-US_TOPIC_0110378367__li134261899523">Click <strong id="EN-US_TOPIC_0110378367__b134816615458"></strong><strong id="EN-US_TOPIC_0110378367__b2034876114515"></strong><strong id="EN-US_TOPIC_0110378367__b18349156144518">Allocate</strong><strong id="EN-US_TOPIC_0110378367__b53491168456"> BMS</strong>.</li><li id="EN-US_TOPIC_0110378367__li430205915415">Configure the BMS parameters.<p id="EN-US_TOPIC_0110378367__p16219164915713"><a name="EN-US_TOPIC_0110378367__li430205915415"></a><a name="li430205915415"></a>Select <strong id="EN-US_TOPIC_0110378367__b115381742181620">Configure now</strong> for <strong id="EN-US_TOPIC_0110378367__b390314791519">Advanced Settings</strong> and add a tag key and tag value. For the tag key and tag value requirements, see <a href="en-us_topic_0157874334.html#EN-US_TOPIC_0157874334__table124931582713">Table 1</a>.</p>
</li><li id="EN-US_TOPIC_0110378367__li134261899523">Click <strong id="EN-US_TOPIC_0110378367__b7876172544816"></strong><strong id="EN-US_TOPIC_0110378367__b387732518484"></strong><strong id="EN-US_TOPIC_0110378367__b28778254485">Allocate</strong><strong id="EN-US_TOPIC_0110378367__b88771925164812"> BMS</strong>.</li><li id="EN-US_TOPIC_0110378367__li430205915415">Configure the BMS parameters.<p id="EN-US_TOPIC_0110378367__p16219164915713"><a name="EN-US_TOPIC_0110378367__li430205915415"></a><a name="li430205915415"></a>Select <strong id="EN-US_TOPIC_0110378367__b115381742181620">Configure now</strong> for <strong id="EN-US_TOPIC_0110378367__b390314791519">Advanced Settings</strong> and add a tag key and tag value. For the tag key and tag value requirements, see <a href="en-us_topic_0157874334.html#EN-US_TOPIC_0157874334__table124931582713">Table 1</a>.</p>
<div class="note" id="EN-US_TOPIC_0110378367__note5493144534314"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0110378367__p154941245204312">For details about other parameters, see <a href="en-us_topic_0053536933.html">Creating a Common BMS</a>.</p>
</div></div>
</li></ol>

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<ul id="EN-US_TOPIC_0117747866__en-us_topic_0040259342_ul37351029162712"><li id="EN-US_TOPIC_0117747866__en-us_topic_0040259342_li12735132932714">Domain name, project name, and project ID, which can be obtained by performing the following operations:<p id="EN-US_TOPIC_0117747866__en-us_topic_0040259342_p1973542918275"><a name="EN-US_TOPIC_0117747866__en-us_topic_0040259342_li12735132932714"></a><a name="en-us_topic_0040259342_li12735132932714"></a>Log in to the management console using the cloud account, click the username in the upper right corner, select <strong id="EN-US_TOPIC_0117747866__en-us_topic_0040259342_b171181053141511">My Credentials</strong> from the drop-down list, and obtain the domain name, project name, and project ID on the <strong id="EN-US_TOPIC_0117747866__en-us_topic_0040259342_b1956165671712">My Credentials</strong> page.</p>
</li><li id="EN-US_TOPIC_0117747866__en-us_topic_0040259342_li13735182917270">Quota information, which includes:<ul id="EN-US_TOPIC_0117747866__en-us_topic_0040259342_ul6735102912273"><li id="EN-US_TOPIC_0117747866__en-us_topic_0040259342_li1073516296277">Service name</li><li id="EN-US_TOPIC_0117747866__en-us_topic_0040259342_li6735152972712">Quota type</li><li id="EN-US_TOPIC_0117747866__en-us_topic_0040259342_li773592992718">Required quota</li></ul>
</li></ul>
<p id="EN-US_TOPIC_0117747866__en-us_topic_0040259342_p126761744182712"><a href="https://docs.otc.t-systems.com/en-us/public/learnmore.html" target="_blank" rel="noopener noreferrer">Learn how to obtain the service hotline and email address.</a></p>
<p id="EN-US_TOPIC_0117747866__en-us_topic_0040259342_p126761744182712"><a href="https://open-telekom-cloud.com/en/contact" target="_blank" rel="noopener noreferrer">Learn how to obtain the service hotline and email address.</a></p>
</div>
</div>
<div>

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</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0128546229__row203371156172011"><td class="cellrowborder" valign="top" width="28.000000000000004%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0128546229__p1133816562203">2022-10-30</p>
<tbody><tr id="EN-US_TOPIC_0128546229__row39606544274"><td class="cellrowborder" valign="top" width="28.000000000000004%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0128546229__p2961105462711">2023-03-06</p>
</td>
<td class="cellrowborder" valign="top" width="72%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0128546229__p1673163112288">Modified the following content:</p>
<p id="EN-US_TOPIC_0128546229__p3821203210280">Added a new flavor in <a href="en-us_topic_0083745258.html">Instance Family</a>.</p>
<p id="EN-US_TOPIC_0128546229__p77667591700">Added the OSs supported by the new flavor in <a href="en-us_topic_0263802108.html">OSs Supported by Different Types of BMSs</a>.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0128546229__row10708111316162"><td class="cellrowborder" valign="top" width="28.000000000000004%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0128546229__p5708313191617">2023-01-05</p>
</td>
<td class="cellrowborder" valign="top" width="72%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0128546229__p59481131141610">Modified the following content:</p>
<p id="EN-US_TOPIC_0128546229__p1659210201247">Moved security groups, key pairs, and passwords from other sections in <a href="en-us_topic_0102159482.html">Security</a> to <a href="en-us_topic_0147508514.html">Identity Authentication and Access Control</a>.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0128546229__row203371156172011"><td class="cellrowborder" valign="top" width="28.000000000000004%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0128546229__p1133816562203">2022-10-30</p>
</td>
<td class="cellrowborder" valign="top" width="72%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0128546229__p662183712113">Modified the following content:</p>
<p id="EN-US_TOPIC_0128546229__p53372406214">Deleted attaching or detaching data disks for BMSs from <a href="en-us_topic_0110303862.html">BMS Operations Recorded by CTS</a>.</p>
@ -17,7 +30,7 @@
<tr id="EN-US_TOPIC_0128546229__row13429720142213"><td class="cellrowborder" valign="top" width="28.000000000000004%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0128546229__p14301920142211">2022-09-30</p>
</td>
<td class="cellrowborder" valign="top" width="72%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0128546229__p98981730152413">Modified the following content:</p>
<p id="EN-US_TOPIC_0128546229__p544823217245">Added OSs supported by BMSs and related description in <a href="en-us_topic_0263802108.html">OSs Supported by Different Types of BMSs</a>.</p>
<p id="EN-US_TOPIC_0128546229__p544823217245">Added CentOS versions supported by BMSs and related description in <a href="en-us_topic_0263802108.html">OSs Supported by Different Types of BMSs</a>.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0128546229__row5313192313"><td class="cellrowborder" valign="top" width="28.000000000000004%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0128546229__p10420142313">2022-07-28</p>
@ -56,7 +69,7 @@
<tr id="EN-US_TOPIC_0128546229__row104141224123319"><td class="cellrowborder" valign="top" width="28.000000000000004%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0128546229__p9414112443318">2018-08-25</p>
</td>
<td class="cellrowborder" valign="top" width="72%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0128546229__p14414162413319">Modified the following content:</p>
<ul id="EN-US_TOPIC_0128546229__ul149641204410"><li id="EN-US_TOPIC_0128546229__li189641223441">Changed "account" to "tenant" in section <a href="en-us_topic_0083745264.html">Security Group</a>.</li><li id="EN-US_TOPIC_0128546229__li37811949442">Changed "Buy licenses from platform" to "Use license from the system" in sections <a href="en-us_topic_0083745262.html">License Type</a> and <a href="en-us_topic_0053536933.html">Creating a Common BMS</a>.</li><li id="EN-US_TOPIC_0128546229__li4642774619">Deleted extra sections.</li></ul>
<ul id="EN-US_TOPIC_0128546229__ul149641204410"><li id="EN-US_TOPIC_0128546229__li37811949442">Changed "Buy licenses from platform" to "Use license from the system" in sections <a href="en-us_topic_0083745262.html">License Type</a> and <a href="en-us_topic_0053536933.html">Creating a Common BMS</a>.</li><li id="EN-US_TOPIC_0128546229__li4642774619">Deleted extra sections.</li></ul>
</td>
</tr>
<tr id="EN-US_TOPIC_0128546229__row174141724163312"><td class="cellrowborder" valign="top" width="28.000000000000004%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0128546229__p841432411330">2018-08-09</p>
@ -188,7 +201,7 @@
<tr id="EN-US_TOPIC_0128546229__row14151224143313"><td class="cellrowborder" valign="top" width="28.000000000000004%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0128546229__p341562423320">2017-10-04</p>
</td>
<td class="cellrowborder" valign="top" width="72%" headers="mcps1.3.1.1.3.1.2 "><p id="EN-US_TOPIC_0128546229__p104154248332">Modified the following content:</p>
<p id="EN-US_TOPIC_0128546229__p941811482437">Optimized the description in section <a href="en-us_topic_0078468105.html">Creating a Private Image from an External Image File</a>.</p>
<p id="EN-US_TOPIC_0128546229__p941811482437">Optimized the description in <a href="en-us_topic_0078468105.html">Creating a Private Image from an External Image File</a>.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0128546229__row1541512411335"><td class="cellrowborder" valign="top" width="28.000000000000004%" headers="mcps1.3.1.1.3.1.1 "><p id="EN-US_TOPIC_0128546229__p041513249334">2017-09-30</p>

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<a name="EN-US_TOPIC_0140735214"></a><a name="EN-US_TOPIC_0140735214"></a>
<h1 class="topictitle1">Key Pair</h1>
<div id="body1542244480400"><div class="section" id="EN-US_TOPIC_0140735214__section131153585615"><h4 class="sectiontitle">What Is a Key Pair?</h4><p id="EN-US_TOPIC_0140735214__p8060118">A key pair, or SSH key pair, is an authentication method used when you remotely log in to Linux instances. A key pair is generated using an encryption algorithm. It contains a public key, and a private key reserved for you. The public key is used to encrypt data (for example, a password), and the private key is used to decrypt the data.</p>
<p id="EN-US_TOPIC_0140735214__p137401571907">The cloud platform stores the public key, and you need to store the private key. Do not share your private key with anyone. Keep your private key secure.</p>
</div>
<div class="section" id="EN-US_TOPIC_0140735214__section11136322132315"><h4 class="sectiontitle">Advantages</h4><p id="EN-US_TOPIC_0140735214__p850512310231">The key pair is more secure and convenient than the username/password method.</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0140735214__table310419771318" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Comparison between the key pair and username/password</caption><thead align="left"><tr id="EN-US_TOPIC_0140735214__row710518710136"><th align="left" class="cellrowborder" valign="top" width="23.22232223222322%" id="mcps1.3.2.3.2.4.1.1"><p id="EN-US_TOPIC_0140735214__p10105117151319">Item</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="35.31353135313531%" id="mcps1.3.2.3.2.4.1.2"><p id="EN-US_TOPIC_0140735214__p18105278138">Key Pair</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="41.46414641464147%" id="mcps1.3.2.3.2.4.1.3"><p id="EN-US_TOPIC_0140735214__p110515751320">Username and Password</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0140735214__row510513714134"><td class="cellrowborder" valign="top" width="23.22232223222322%" headers="mcps1.3.2.3.2.4.1.1 "><p id="EN-US_TOPIC_0140735214__p1810527101311">Security</p>
</td>
<td class="cellrowborder" valign="top" width="35.31353135313531%" headers="mcps1.3.2.3.2.4.1.2 "><ul id="EN-US_TOPIC_0140735214__ul09081258171613"><li id="EN-US_TOPIC_0140735214__li49081158131617">More secure than the password and free from brute-force attacks</li><li id="EN-US_TOPIC_0140735214__li1562919017171">The private key cannot be derived from the public key.</li></ul>
</td>
<td class="cellrowborder" valign="top" width="41.46414641464147%" headers="mcps1.3.2.3.2.4.1.3 "><p id="EN-US_TOPIC_0140735214__p1910620715133">Poor security</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0140735214__row7106573132"><td class="cellrowborder" valign="top" width="23.22232223222322%" headers="mcps1.3.2.3.2.4.1.1 "><p id="EN-US_TOPIC_0140735214__p1110667191319">Convenience</p>
</td>
<td class="cellrowborder" valign="top" width="35.31353135313531%" headers="mcps1.3.2.3.2.4.1.2 "><p id="EN-US_TOPIC_0140735214__p31065716137">Simultaneous login to a large number of Linux instances, simplifying management</p>
</td>
<td class="cellrowborder" valign="top" width="41.46414641464147%" headers="mcps1.3.2.3.2.4.1.3 "><p id="EN-US_TOPIC_0140735214__p1010618720136">Login to only one Linux instance at one time, giving no chance of batch maintenance</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section" id="EN-US_TOPIC_0140735214__section1283812457235"><h4 class="sectiontitle">Constraints</h4><ul id="EN-US_TOPIC_0140735214__ul145951119183017"><li id="EN-US_TOPIC_0140735214__li17595111911308">Only Linux instances support the key pair method.</li><li id="EN-US_TOPIC_0140735214__li030119313305">Only RSA key pairs are supported. RSA keys are typically 1024, 2048, or 4096 bits long.</li><li id="EN-US_TOPIC_0140735214__li14958517334">A Linux instance can have only one key pair. If a key pair has been bound to your BMS and you bind a new key pair to the BMS, the new key pair will replace the original one.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0140735214__section13455325174014"><h4 class="sectiontitle">Generation Method</h4><ul id="EN-US_TOPIC_0140735214__ul52071129144011"><li id="EN-US_TOPIC_0140735214__li1720792918403">Create a key pair on the management console.<div class="note" id="EN-US_TOPIC_0140735214__note124931629164219"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0140735214__p7493142954217">When a key pair is generated, download and properly keep it.</p>
</div></div>
</li><li id="EN-US_TOPIC_0140735214__li1554123114419">Use PuTTYgen to create a key pair and import the key pair into the cloud platform.</li></ul>
</div>
<div class="section" id="EN-US_TOPIC_0140735214__section1077412356484"><h4 class="sectiontitle">Related Operations</h4><p id="EN-US_TOPIC_0140735214__p2712827131612"><a href="en-us_topic_0083737006.html">Using an SSH Key Pair</a></p>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="en-us_topic_0102159482.html">Security</a></div>
</div>
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<h1 class="topictitle1">Step 1: Create a BMS</h1>
<div id="body1542246271544"><div class="section" id="EN-US_TOPIC_0140737434__section847213219013"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0140737434__p11772038502">This section helps you quickly create a BMS that will be used as a web server. For details about all the parameters used for creating a BMS, see <a href="en-us_topic_0083745259.html">Region and AZ</a>. To create a BMS by calling an API, see <a href="https://docs.otc.t-systems.com/en-us/api/bms/en-us_topic_0053158682.html" target="_blank" rel="noopener noreferrer">Creating a BMS</a>.</p>
<div id="body1542246271544"><div class="section" id="EN-US_TOPIC_0140737434__section847213219013"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0140737434__p11772038502">This section helps you quickly create a BMS that will be used as a web server. For details about all the parameters used for creating a BMS, see <a href="en-us_topic_0083745259.html">Region and AZ</a>. To create a BMS by calling an API, see "Creating a BMS (Native OpenStack API)" in <em id="EN-US_TOPIC_0140737434__i348105651111">Bare Metal Server API Reference</em>.</p>
</div>
<div class="section" id="EN-US_TOPIC_0140737434__section48261028182215"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0140737434__ol71629351227"><li id="EN-US_TOPIC_0140737434__li8162835122212">Log in to the Cloud Server Console.</li><li id="EN-US_TOPIC_0140737434__li1454105972210">In the navigation pane, choose <strong id="EN-US_TOPIC_0140737434__b74705505567">Bare Metal Server</strong>.</li><li id="EN-US_TOPIC_0140737434__li18106625122716">In the upper right corner, click <strong id="EN-US_TOPIC_0140737434__b59069588619"></strong><strong id="EN-US_TOPIC_0140737434__b290611581966"></strong><strong id="EN-US_TOPIC_0140737434__b2907105815612">Allocate BMS</strong>.</li><li id="EN-US_TOPIC_0140737434__li1413632492712">Configure parameters.<ul id="EN-US_TOPIC_0140737434__ul136331451162918"><li id="EN-US_TOPIC_0140737434__li163355115297">Specify <strong id="EN-US_TOPIC_0140737434__b176587221520">Region</strong> and <strong id="EN-US_TOPIC_0140737434__b866162217519">AZ</strong>. <div class="note" id="EN-US_TOPIC_0140737434__note103091486344"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0140737434__p63091085349">After the BMS is created, you cannot change its region or AZ.</p>
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<h1 class="topictitle1">Stopping a BMS</h1>
<div id="body1542247088489"><div class="section" id="EN-US_TOPIC_0140740387__section89140121163"><h4 class="sectiontitle">Scenarios</h4><p id="EN-US_TOPIC_0140740387__p113085144611">You can stop BMSs in <strong id="EN-US_TOPIC_0140740387__b206581747173616">Running</strong> state.</p>
<div class="note" id="EN-US_TOPIC_0140740387__note20185152293315"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0140740387__p718652215330">If you choose to forcibly stop a BMS, services running on the BMS will be stopped. Before performing this operation, ensure that you have saved files on the BMS.</p>
<div class="note" id="EN-US_TOPIC_0140740387__note20185152293315"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0140740387__ul208564378612"><li id="EN-US_TOPIC_0140740387__li685719371369">If you choose to forcibly stop a BMS, services running on the BMS will be stopped. Before performing this operation, ensure that you have saved files on the BMS.</li><li id="EN-US_TOPIC_0140740387__li128577371564">You can stop a BMS only on the management console and cannot run <strong id="EN-US_TOPIC_0140740387__b29565610503">shutdown</strong> to stop it. It is because that the <strong id="EN-US_TOPIC_0140740387__b11741824125310">shutdown</strong> and other commands attempting to stop a BMS will be regarded as unexpected operations and will not take effect.</li></ul>
</div></div>
</div>
<div class="section" id="EN-US_TOPIC_0140740387__section1534145814619"><h4 class="sectiontitle">Procedure</h4><ol id="EN-US_TOPIC_0140740387__ol24676273383"><li id="EN-US_TOPIC_0140740387__li10711121911548">Log in to the management console.</li><li id="EN-US_TOPIC_0140740387__li969810464567">Under <strong id="EN-US_TOPIC_0140740387__en-us_topic_0053536924_b1134469344202623">Computing</strong>, click <strong id="EN-US_TOPIC_0140740387__en-us_topic_0053536924_b856921432202623">Bare Metal Server</strong>.<p id="EN-US_TOPIC_0140740387__en-us_topic_0053536924_p127731959141113">The BMS console is displayed.</p>

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<p id="EN-US_TOPIC_0166937671__p166291834658">Host names of BMSs created from some types of images have suffix <strong id="EN-US_TOPIC_0166937671__b84235270616178">.novalocal</strong>, whereas others do not.</p>
<div class="section" id="EN-US_TOPIC_0166937671__section152294541871"><h4 class="sectiontitle">Troubleshooting</h4><p id="EN-US_TOPIC_0166937671__p1870117710820">This is a normal phenomenon. You can ignore it.</p>
</div>
<p id="EN-US_TOPIC_0166937671__p917933915817">The static host name of a Linux BMS is user-defined and injected using Cloud-Init during the BMS creation. According to the test results, Cloud-Init adapts to OSs differently. As a result, hostnames of some ECSs have suffix <strong id="EN-US_TOPIC_0166937671__b84235270616229">.novalocal</strong>, whereas others do not.</p>
<p id="EN-US_TOPIC_0166937671__p917933915817">The static host name of a Linux BMS is user-defined and injected using Cloud-Init during the BMS creation. According to the test results, Cloud-Init adapts to OSs differently. As a result, hostnames of some BMSs have suffix <strong id="EN-US_TOPIC_0166937671__b84235270616229">.novalocal</strong>, whereas others do not.</p>
<p id="EN-US_TOPIC_0166937671__p1686018267395">If you really do not want any host names with the suffix <strong id="EN-US_TOPIC_0166937671__b4929819193011">.novalocal</strong>, you can change the hostname. For details, see <a href="en-us_topic_0083737000.html">Changing the Name of a BMS</a></p>
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<h1 class="topictitle1">What Are the Advanced Features of BMSs Using EVS Disks?</h1>
<div id="body1578638656316"><p id="EN-US_TOPIC_0218787611__p5591721161012">BMSs that use EVS disks as their system disks can be provisioned within a shorter time, which facilitates quick service recovery.</p>
<p id="EN-US_TOPIC_0218787611__p17002381203">Such BMSs have the following advanced features:</p>
<ul id="EN-US_TOPIC_0218787611__ul5347125413113"><li id="EN-US_TOPIC_0218787611__en-us_topic_0053536894_li197351934142810">BMSs booted from EVS disks can be provisioned within about 5 minutes.</li><li id="EN-US_TOPIC_0218787611__en-us_topic_0053536894_li5713555182815">BMSs support CSBS backups, ensuring data security.</li><li id="EN-US_TOPIC_0218787611__en-us_topic_0053536894_li490011528335">BMS rebuilding upon faults is supported, enabling quick service recovery.</li><li id="EN-US_TOPIC_0218787611__en-us_topic_0053536894_li04591573810">An image of a BMS can be exported to apply configurations of the BMS to other BMSs, eliminating the need to repeatedly configure BMSs.</li></ul>
<ul id="EN-US_TOPIC_0218787611__ul5347125413113"><li id="EN-US_TOPIC_0218787611__en-us_topic_0053536894_li197351934142810">BMSs booted from EVS disks can be provisioned within about 5 minutes.</li><li id="EN-US_TOPIC_0218787611__en-us_topic_0053536894_li5713555182815">CSBS backups ensure data security.</li><li id="EN-US_TOPIC_0218787611__en-us_topic_0053536894_li490011528335">BMS rebuilding upon faults is supported, enabling quick service recovery.</li><li id="EN-US_TOPIC_0218787611__en-us_topic_0053536894_li04591573810">An image of a BMS can be exported to apply configurations of the BMS to other BMSs, eliminating the need to repeatedly configure BMSs.</li></ul>
<div class="section" id="EN-US_TOPIC_0218787611__section740398971"><h4 class="sectiontitle">Helpful Links</h4><p id="EN-US_TOPIC_0218787611__p821218501991"><a href="en-us_topic_0053536894.html">Creating a BMS Supporting Quick Provisioning</a></p>
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<h1 class="topictitle1">OSs Supported by Different Types of BMSs</h1>
<div id="body1595407510147"><p id="EN-US_TOPIC_0263802108__p8060118">The following tables list the 64-bit OSs supported by different BMS types.</p>
<ul id="EN-US_TOPIC_0263802108__ul42952044134011"><li id="EN-US_TOPIC_0263802108__li1729684484018"><a href="#EN-US_TOPIC_0263802108__table145638289168">Table 1</a> lists the OSs supported by compute-optimized physical.o2.medium BMSs.</li><li id="EN-US_TOPIC_0263802108__li11396184284114"><a href="#EN-US_TOPIC_0263802108__table221119842419">Table 2</a> lists the OSs supported by GPU-accelerated P1 and P2 BMSs.</li><li id="EN-US_TOPIC_0263802108__li642213563419"><a href="#EN-US_TOPIC_0263802108__table1261773364111">Table 3</a> lists the OSs supported by high-performance computing physical.h2.large BMSs.</li><li id="EN-US_TOPIC_0263802108__li58136415424"><a href="#EN-US_TOPIC_0263802108__table16114231102412">Table 4</a> lists the OSs supported by memory-optimized M2 BMSs.</li></ul>
<ul id="EN-US_TOPIC_0263802108__ul42952044134011"><li id="EN-US_TOPIC_0263802108__li1729684484018"><a href="#EN-US_TOPIC_0263802108__table145638289168">Table 1</a> lists the OSs supported by compute-optimized physical.o2.medium BMSs.</li><li id="EN-US_TOPIC_0263802108__li11396184284114"><a href="#EN-US_TOPIC_0263802108__table221119842419">Table 2</a> lists the OSs supported by GPU-accelerated P1 and P2 BMSs.</li><li id="EN-US_TOPIC_0263802108__li642213563419"><a href="#EN-US_TOPIC_0263802108__table1261773364111">Table 3</a> lists the OSs supported by high-performance computing physical.h2.large BMSs.</li><li id="EN-US_TOPIC_0263802108__li58136415424"><a href="#EN-US_TOPIC_0263802108__table16114231102412">Table 4</a> lists the OSs supported by memory-optimized M2 BMSs.</li><li id="EN-US_TOPIC_0263802108__li1352825412"><a href="#EN-US_TOPIC_0263802108__table188617221012">Table 5</a> lists the OSs supported by I/O optimized physical.i7n.28xlarge.4 BMSs.</li></ul>
<div class="note" id="EN-US_TOPIC_0263802108__note17877129161011"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="EN-US_TOPIC_0263802108__ul1558014353104"><li id="EN-US_TOPIC_0263802108__li195804358107">It is recommended that you use the official OS release versions. Do not tailor or customize the release versions, or problems may occur.</li><li id="EN-US_TOPIC_0263802108__li2581123551018">OS vendors do not always update OS release versions regularly. Some versions are no longer maintained, and these deprecated versions no longer receive security patches. Ensure that you read the update notifications from OS vendors and update your OS so that it runs properly.</li><li id="EN-US_TOPIC_0263802108__li298123718109">For CentOS 7.4 or earlier, BMS extension NICs cannot be pinged due to known kernel issues. So, you are advised to use CentOS 7.5 or later. For details, see <a href="en-us_topic_0151554411.html">How Do I Handle the Failure to Ping a CentOS 7 Extension NIC?</a></li></ul>
</div></div>
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</tbody>
</table>
</div>
<div class="tablenoborder"><a name="EN-US_TOPIC_0263802108__table188617221012"></a><a name="table188617221012"></a><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0263802108__table188617221012" frame="border" border="1" rules="all"><caption><b>Table 5 </b>I/O-optimized physical.i7n.28xlarge.4</caption><thead align="left"><tr id="EN-US_TOPIC_0263802108__row1588792214112"><th align="left" class="cellrowborder" valign="top" width="34.77%" id="mcps1.3.8.2.3.1.1"><p id="EN-US_TOPIC_0263802108__p7282174117111">OS</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="65.23%" id="mcps1.3.8.2.3.1.2"><p id="EN-US_TOPIC_0263802108__p12887142215117">Version</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0263802108__row1888710221619"><td class="cellrowborder" valign="top" width="34.77%" headers="mcps1.3.8.2.3.1.1 "><p id="EN-US_TOPIC_0263802108__p215973711310">Ubuntu</p>
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<td class="cellrowborder" valign="top" width="65.23%" headers="mcps1.3.8.2.3.1.2 "><p id="EN-US_TOPIC_0263802108__p1965064911716">Ubuntu 22.04 LTS</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
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