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Dong, Qiu Jian
86fb05065f
Reviewed-by: Eotvos, Oliver <oliver.eotvos@t-systems.com> Co-authored-by: Dong, Qiu Jian <qiujiandong1@huawei.com> Co-committed-by: Dong, Qiu Jian <qiujiandong1@huawei.com>
49 lines
11 KiB
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49 lines
11 KiB
HTML
<a name="cce_faq_00027"></a><a name="cce_faq_00027"></a>
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<h1 class="topictitle1">How Do I Troubleshoot Problems Occurred When Adding Nodes to a CCE Cluster?</h1>
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<div id="body8662426"><div class="section" id="cce_faq_00027__section136231139121819"><h4 class="sectiontitle">Note</h4><ul id="cce_faq_00027__ul447711121115"><li id="cce_faq_00027__li2478612141112">The node images in the same cluster must be the same. Pay attention to this when creating, adding, or accepting nodes in a cluster.</li><li id="cce_faq_00027__li0478181219113">If you need to allocate user space from the data disk when creating a node, do not set the data storage path to any key directory. For example, to store data in the <strong id="cce_faq_00027__b1978295612222">/home</strong> directory, set the directory to <strong id="cce_faq_00027__b978825611228">/home/test</strong> instead of <strong id="cce_faq_00027__b878825692216">/home</strong>.<div class="note" id="cce_faq_00027__note168401426124510"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="cce_faq_00027__en-us_topic_0107283640_p384172604518">Do not set <strong id="cce_faq_00027__b129219557263">Path inside a node</strong> to the root directory <strong id="cce_faq_00027__b2293355192615">/</strong>. Otherwise, the mounting fails. Set <strong id="cce_faq_00027__b54732129297">Path inside a node</strong> to any of the following:</p>
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<ul id="cce_faq_00027__en-us_topic_0107283640_ul9786952142610"><li id="cce_faq_00027__en-us_topic_0107283640_li19786105242619">/opt/xxxx (excluding <strong id="cce_faq_00027__b168553269295">/opt/cloud</strong>)</li><li id="cce_faq_00027__en-us_topic_0107283640_li278615525269">/mnt/xxxx (excluding <strong id="cce_faq_00027__b47816336292">/mnt/paas</strong>)</li><li id="cce_faq_00027__en-us_topic_0107283640_li167861752152610">/tmp/xxx</li><li id="cce_faq_00027__en-us_topic_0107283640_li1176843184115">/var/xxx (excluding key directories such as <strong id="cce_faq_00027__b1146418460299">/var/lib</strong>, <strong id="cce_faq_00027__b947074612914">/var/script</strong>, and <strong id="cce_faq_00027__b17470114612917">/var/paas</strong>)</li><li id="cce_faq_00027__en-us_topic_0107283640_li8786105216260">/xxxx (It cannot conflict with the system directory, such as <strong id="cce_faq_00027__b192806476302">bin</strong>, <strong id="cce_faq_00027__b318212510309">lib</strong>, <strong id="cce_faq_00027__b697215314307">home</strong>, <strong id="cce_faq_00027__b1572145919304">root</strong>, <strong id="cce_faq_00027__b176309310311">boot</strong>, <strong id="cce_faq_00027__b149961953315">dev</strong>, <strong id="cce_faq_00027__b96130813317">etc</strong>, <strong id="cce_faq_00027__b6807112913323">lost+found</strong>, <strong id="cce_faq_00027__b42531633133110">mnt</strong>, <strong id="cce_faq_00027__b342353611318">proc</strong>, <strong id="cce_faq_00027__b12765739183117">sbin</strong>, <strong id="cce_faq_00027__b15230742123116">srv</strong>, <strong id="cce_faq_00027__b8485344153117">tmp</strong>, <strong id="cce_faq_00027__b17476547183112">var</strong>, <strong id="cce_faq_00027__b1597420512317">media</strong>, <strong id="cce_faq_00027__b136876541311">opt</strong>, <strong id="cce_faq_00027__b18518659143112">selinux</strong>, <strong id="cce_faq_00027__b1172826328">sys</strong>, and <strong id="cce_faq_00027__b144415713327">usr</strong>.)</li></ul>
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<p id="cce_faq_00027__en-us_topic_0107283640_p5195124511719">Do not set it to <strong id="cce_faq_00027__b5675163320321">/home/paas</strong>, <strong id="cce_faq_00027__b19676203317325">/var/paas</strong>, <strong id="cce_faq_00027__b9676173363215">/var/lib</strong>, <strong id="cce_faq_00027__b267653363220">/var/script</strong>, <strong id="cce_faq_00027__b7676173363217">/mnt/paas</strong>, or <strong id="cce_faq_00027__b1167615331324">/opt/cloud</strong>. Otherwise, the system or node installation will fail.</p>
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</div></div>
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</li></ul>
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</div>
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<div class="section" id="cce_faq_00027__section749313281020"><h4 class="sectiontitle">Check Item 1: Subnet Quota</h4><p id="cce_faq_00027__p1624510493119"><strong id="cce_faq_00027__b116551253111">Symptom</strong></p>
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<p id="cce_faq_00027__p185043252713">New nodes cannot be added to a CCE cluster, and a message is displayed indicating that the subnet quota is insufficient.</p>
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<p id="cce_faq_00027__p6278112416299"></p>
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<p id="cce_faq_00027__p10362349201112"><strong id="cce_faq_00027__b22931942103617">Cause Analysis</strong></p>
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<p id="cce_faq_00027__p13821163274011">Example:</p>
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<p id="cce_faq_00027__p1620392814404">VPC CIDR block: 192.168.66.0/24</p>
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<p id="cce_faq_00027__p18203728124017">Subnet CIDR block: 192.168.66.0/24</p>
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<p id="cce_faq_00027__p72035280404">In 192.168.66.0/24, all 251 private IP addresses have been used.</p>
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<p id="cce_faq_00027__p275313254418"><strong id="cce_faq_00027__b4231152012393">Solution</strong></p>
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<ol id="cce_faq_00027__ol1274871844416"><li id="cce_faq_00027__li17748191894419"><span>Expand the VPC.</span><p><p id="cce_faq_00027__p5221175112407">Log in to the console and choose <span class="uicontrol" id="cce_faq_00027__uicontrol1481262764519"><b>Virtual Private Cloud</b></span> from the service list. On the page displayed, locate the row containing the target VPC and click <span class="uicontrol" id="cce_faq_00027__uicontrol4213758114718"><b>Edit CIDR Block</b></span> in the <span class="uicontrol" id="cce_faq_00027__uicontrol199016567476"><b>Operation</b></span> column.</p>
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</p></li><li id="cce_faq_00027__li103351825204420"><span>Change the subnet mask to <strong id="cce_faq_00027__b10676336429">16</strong> and click <strong id="cce_faq_00027__b2312113017529">OK</strong>.</span><p><p id="cce_faq_00027__p112714914491"></p>
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</p></li><li id="cce_faq_00027__li1313717754919"><span>Click the VPC name. On the <strong id="cce_faq_00027__b13289413125518">Summary</strong> tab page, click the number next to <strong id="cce_faq_00027__b181162302552">Subnets</strong> on the right and click <strong id="cce_faq_00027__b102561141195617">Create Subnet</strong> to create a subnet.</span><p><p id="cce_faq_00027__p316761712513"></p>
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</p></li><li id="cce_faq_00027__li6315171475116"><span>Return to the page for adding a node on the CCE console, and select the newly created subnet.</span><p><div class="note" id="cce_faq_00027__note19655394710"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ol type="a" id="cce_faq_00027__ol1754213383"><li id="cce_faq_00027__li16542539818">Adding subnets to the VPC does not affect the use of the existing 192.168.66.0/24 CIDR block.<p id="cce_faq_00027__p25741458817"><a name="cce_faq_00027__li16542539818"></a><a name="li16542539818"></a>You can select a new subnet when creating a CCE node. The new subnet has a maximum of 251 private IP addresses. If the number of private IP addresses cannot meet service requirements, you can add more subnets.</p>
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</li><li id="cce_faq_00027__li65421734810">Subnets in the same VPC can communicate with each other.</li></ol>
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</div></div>
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</p></li></ol>
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</div>
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<div class="section" id="cce_faq_00027__en-us_topic_0089615102_s29366dd7fe2e4257bd9481f435155270"><h4 class="sectiontitle">Check Item 2: EIP Quota</h4><p id="cce_faq_00027__p687661615816"><strong id="cce_faq_00027__b693609196">Symptom</strong></p>
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<p id="cce_faq_00027__en-us_topic_0089615102_a0d47456e1aad4d29bb57c7f8a20a9537">When a node is added, <strong id="cce_faq_00027__b18321114815107">EIP</strong><strong id="cce_faq_00027__b1032310617110"></strong> is set to <strong id="cce_faq_00027__b63211480108">Auto create</strong>. The node cannot be created, and a message indicating that EIPs are insufficient is displayed.</p>
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<p id="cce_faq_00027__p14193184013582"><strong id="cce_faq_00027__b1447762118136">Solution</strong></p>
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</div>
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<p id="cce_faq_00027__en-us_topic_0089615102_p81731324722">Two methods are available to solve the problem.</p>
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<ul id="cce_faq_00027__en-us_topic_0089615102_ul952893916210"><li id="cce_faq_00027__en-us_topic_0089615102_li155281239622"><strong id="cce_faq_00027__b8731145481314">Method 1:</strong> Unbind the VMs bound with EIPs and add a node again.<ol id="cce_faq_00027__en-us_topic_0089615102_ol174337174410"><li id="cce_faq_00027__en-us_topic_0089615102_li4432141719411">Log in to the management console.</li><li id="cce_faq_00027__en-us_topic_0089615102_li5432017741">Choose <strong id="cce_faq_00027__b6202743103014">Service List</strong> > <strong id="cce_faq_00027__b169181539135713">Compute</strong><strong id="cce_faq_00027__b15768195285719"></strong> > <strong id="cce_faq_00027__b35501502303"></strong><strong id="cce_faq_00027__b16899854193019">Elastic Cloud Server</strong>.</li><li id="cce_faq_00027__li6246201521515">In the ECS list, locate the target ECS and click its name.</li><li id="cce_faq_00027__en-us_topic_0089615102_li1943391718417">On the page displayed, click the <strong id="cce_faq_00027__b356651516510">EIPs</strong> tab. In the EIP list, locate the row containing the target EIP, click <strong id="cce_faq_00027__b128311118115517">Unbind</strong>, and click <strong id="cce_faq_00027__b16461020115516">Yes</strong>.</li><li id="cce_faq_00027__li19724172015380">Return to the page for adding a node on the CCE console, select <strong id="cce_faq_00027__b096111012576">Use existing</strong> for <strong id="cce_faq_00027__b175481223131718">EIP</strong>, and add the node again.</li></ol>
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</li><li id="cce_faq_00027__en-us_topic_0089615102_li7308114751116"><strong id="cce_faq_00027__b1952504911254">Method 2:</strong> Increase the EIP quota.</li></ul>
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<div class="section" id="cce_faq_00027__section6376856455"><h4 class="sectiontitle">Check Item 3: Security Group</h4><p id="cce_faq_00027__p13768181715372"><strong id="cce_faq_00027__b75701446101918">Symptom</strong></p>
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<p id="cce_faq_00027__p1476819174378">A node cannot be added to a CCE cluster.</p>
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<p id="cce_faq_00027__p676819177378"><strong id="cce_faq_00027__b12719537199">Solution</strong></p>
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<p id="cce_faq_00027__p146815453425">You can click the cluster name to view the cluster details. In the <strong id="cce_faq_00027__b7491537101114">Networking Configuration</strong> area, click the icon next to <strong id="cce_faq_00027__b449103711117">Default security group of the node</strong> to check whether the default security group is deleted and whether the security group rules comply with <a href="cce_faq_00265.html">How Can I Configure a Security Group Rule in a Cluster?</a>.</p>
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<p id="cce_faq_00027__p62221044316">If your account has multiple clusters and you need to manage network security policies of nodes in a unified manner, you can specify custom security groups.</p>
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<p id="cce_faq_00027__p158671535152820"></p>
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<p id="cce_faq_00027__p539424144214"></p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="cce_faq_00280.html">Node Creation</a></div>
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</div>
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</div>
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