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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>
31 lines
5.4 KiB
HTML
31 lines
5.4 KiB
HTML
<a name="cce_faq_00039"></a><a name="cce_faq_00039"></a>
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<h1 class="topictitle1">How Do I Locate the Fault When a Cluster Is Unavailable?</h1>
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<div id="body1528083621790"><p id="cce_faq_00039__p14997101094014">If a cluster is <strong id="cce_faq_00039__b114580411118">Unavailable</strong>, perform the following operations to locate the fault.</p>
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<div class="section" id="cce_faq_00039__section49007783018"><h4 class="sectiontitle">Troubleshooting Process</h4><p id="cce_faq_00039__p17987205213470">The issues here are described in order of how likely they are to occur.</p>
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<p id="cce_faq_00039__p997211345215">Check these causes one by one until you find the cause of the fault.</p>
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<ul id="cce_faq_00039__ul466713514304"><li id="cce_faq_00039__li166711350307"><a href="#cce_faq_00039__section48059154014">Check Item 1: Whether the Security Group Is Modified</a></li><li id="cce_faq_00039__li5925125219415"><a href="#cce_faq_00039__section1821659134014">Check Item 2: Whether There Are Residual Listeners and Backend Server Groups on the Load Balancer</a></li></ul>
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<p id="cce_faq_00039__p1441919272419">If the fault persists, and contact the customer service to help you locate the fault.</p>
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<div class="fignone" id="cce_faq_00039__fig1676014246427"><span class="figcap"><b>Figure 1 </b>Fault locating</span><br><span><img id="cce_faq_00039__image776032419422" src="en-us_image_0000001851743880.png"></span></div>
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</div>
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<div class="section" id="cce_faq_00039__section48059154014"><a name="cce_faq_00039__section48059154014"></a><a name="section48059154014"></a><h4 class="sectiontitle">Check Item 1: Whether the Security Group Is Modified</h4><ol id="cce_faq_00039__ol568514916220"><li id="cce_faq_00039__li1820043613567"><span>Log in to the management console, and choose <strong id="cce_faq_00039__b1780791815113">Service List</strong> > <strong id="cce_faq_00039__b480718183513">Networking</strong> > <strong id="cce_faq_00039__b580771845116">Virtual Private Cloud</strong>. In the navigation pane on the left, choose <strong id="cce_faq_00039__b1580812183513">Access Control</strong> > <strong id="cce_faq_00039__b1680861811519">Security Groups</strong> to find the security group of the master node in the cluster.</span><p><p id="cce_faq_00039__p4751538205611">The name of this security group is in the format of <em id="cce_faq_00039__i1828571219574">Cluster name</em>-cce-<strong id="cce_faq_00039__b1928519129578">control</strong>-<em id="cce_faq_00039__i7286201285717">ID</em>.</p>
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</p></li><li id="cce_faq_00039__li18627872281"><span>Click the security group. On the details page displayed, ensure that the security group rules of the master node are correct.</span><p><p id="cce_faq_00039__p6709115018355">For details, see <a href="cce_faq_00265.html">How Can I Configure a Security Group Rule in a Cluster?</a>.</p>
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</p></li></ol>
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</div>
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<div class="section" id="cce_faq_00039__section1821659134014"><a name="cce_faq_00039__section1821659134014"></a><a name="section1821659134014"></a><h4 class="sectiontitle">Check Item 2: Whether There Are Residual Listeners and Backend Server Groups on the Load Balancer</h4><p id="cce_faq_00039__p57771325132115"><strong id="cce_faq_00039__b11850123342518">Reproducing the Problem</strong></p>
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<p id="cce_faq_00039__p17345113502513">A cluster exception occurs when a LoadBalancer Service is being created or deleted. After the fault is rectified, the Service is deleted successfully, but there are residual listeners and backend server group.</p>
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<ol id="cce_faq_00039__ol1694354917259"><li id="cce_faq_00039__li11943349122517"><span>Pre-create a CCE cluster. In the cluster, use the official Nginx image to create workloads, preset load balancers, Services, and ingresses.</span></li><li id="cce_faq_00039__li194318498255"><span>Ensure that the cluster is running properly and the Nginx workload is stable.</span></li><li id="cce_faq_00039__li49432498255"><span>Create and delete 10 LoadBalancer Services every 20 seconds.</span></li><li id="cce_faq_00039__li1994344922519"><span>An injection exception occurs in the cluster. For example, the etcd pod is unavailable or the cluster is hibernated.</span></li></ol>
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<p id="cce_faq_00039__p127517711297"><strong id="cce_faq_00039__b155178571217">Possible Causes</strong></p>
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<p id="cce_faq_00039__p103591812132911">There are residual listeners and backend server groups on the load balancer.</p>
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<p id="cce_faq_00039__p687853612288"><strong id="cce_faq_00039__b206721819193214">Solution</strong></p>
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<p id="cce_faq_00039__p393524210288">Manually clear residual listeners and backend server groups.</p>
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<ol id="cce_faq_00039__ol738174212320"><li id="cce_faq_00039__li17387429324"><span>Log in to the management console and choose <strong id="cce_faq_00039__b1189372313211">Network</strong> > <strong id="cce_faq_00039__b4898182343211">Elastic Load Balance</strong> from the service list.</span></li><li id="cce_faq_00039__li798875483213"><span>In the load balancer list, click the name of the target load balancer to go to the details page. On the <strong id="cce_faq_00039__b365554223213">Listeners</strong> tab page, locate the target listener and delete it.</span></li><li id="cce_faq_00039__li15612101316365"><span>On the <strong id="cce_faq_00039__b742995253211">Backend Server Groups</strong> tab page, locate the target backend server group and delete it.</span></li></ol>
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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_00279.html">Cluster Running</a></div>
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</div>
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</div>
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