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doc-exports/docs/css/api-ref/UpdateInstance.html
zhengxiu 8f6b8d3664 css api 25.6.0 version 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: zhengxiu <zhengxiu@huawei.com>
Co-committed-by: zhengxiu <zhengxiu@huawei.com>
2025-11-25 11:21:12 +00:00

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<a name="UpdateInstance"></a><a name="UpdateInstance"></a>
<h1 class="topictitle1">Replacing a Node</h1>
<div id="body1708331107508"><div class="section"><h4 class="sectiontitle">Function</h4><p>This API is used to replace a failed node.</p>
<p>If a node in an Elasticsearch cluster is faulty, you can replace it to restore services.</p>
<p>The node replacement process is as follows:</p>
<ol><li><p>Migrate data from the node that needs to be replaced to other available nodes.</p>
</li><li><p>Rebuild the node using the original ID, IP address, specifications, and AZ.</p>
</li><li><p>Add the new node into the cluster. The system automatically triggers a shard reallocation, migrating some of the shards</p>
</li></ol>
<p>to the new node</p>
<p>This process does not interrupt services because data is migrated from the replaced node to other available nodes.</p>
<div class="note"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody">All mission-critical data has been backed up before a node replacement. This is to prevent data loss.</div></div>
</div>
<div class="section" id="UpdateInstance__atuogenerate_1"><h4 class="sectiontitle">Calling Method</h4><p>For details, see <a href="css_03_0077.html">Calling APIs</a>.</p>
</div>
<div class="section" id="UpdateInstance__atuogenerate_2"><h4 class="sectiontitle">URI</h4><p>PUT /v1.0/{project_id}/clusters/{cluster_id}/instance/{instance_id}/replace</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Path Parameters</caption><thead align="left"><tr><th align="left" class="cellrowborder" valign="top" width="20%" id="mcps1.3.3.3.2.5.1.1"><p>Parameter</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="20%" id="mcps1.3.3.3.2.5.1.2"><p>Mandatory</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="20%" id="mcps1.3.3.3.2.5.1.3"><p>Type</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="40%" id="mcps1.3.3.3.2.5.1.4"><p>Description</p>
</th>
</tr>
</thead>
<tbody><tr><td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.3.3.2.5.1.1 "><p>project_id</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.3.3.2.5.1.2 "><p>Yes</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.3.3.2.5.1.3 "><p>String</p>
</td>
<td class="cellrowborder" valign="top" width="40%" headers="mcps1.3.3.3.2.5.1.4 "><p><strong>Definition</strong>:</p>
<p>Project ID. For details about how to obtain the project ID and name, see <a href="css_03_0071.html">Obtaining the Project ID and Name</a>.</p>
<p><strong>Constraints</strong>:</p>
<p>N/A</p>
<p><strong>Value range</strong>:</p>
<p>Project ID of the account.</p>
<p><strong>Default value</strong>:</p>
<p>N/A</p>
</td>
</tr>
<tr><td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.3.3.2.5.1.1 "><p>cluster_id</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.3.3.2.5.1.2 "><p>Yes</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.3.3.2.5.1.3 "><p>String</p>
</td>
<td class="cellrowborder" valign="top" width="40%" headers="mcps1.3.3.3.2.5.1.4 "><p><strong>Definition</strong>:</p>
<p>ID of the cluster where nodes are to be replaced. For details about how to obtain the cluster ID, see <a href="css_03_0101.html">Obtaining the Cluster ID</a>.</p>
<p><strong>Constraints</strong>:</p>
<p>N/A</p>
<p><strong>Value range</strong>:</p>
<p>Cluster ID.</p>
<p><strong>Default value</strong>:</p>
<p>N/A</p>
</td>
</tr>
<tr><td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.3.3.2.5.1.1 "><p>instance_id</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.3.3.2.5.1.2 "><p>Yes</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.3.3.2.5.1.3 "><p>String</p>
</td>
<td class="cellrowborder" valign="top" width="40%" headers="mcps1.3.3.3.2.5.1.4 "><p><strong>Definition</strong>:</p>
<p>ID of the node to be replaced.</p>
<p><strong>Constraints</strong>:</p>
<p>N/A</p>
<p><strong>Value range</strong>:</p>
<p>Node ID. Obtain the <strong>ID</strong> attribute in instances by referring to <a href="ShowClusterDetail.html">Querying Cluster Details</a>.</p>
<p><strong>Default value</strong>:</p>
<p>N/A</p>
</td>
</tr>
</tbody>
</table>
</div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><caption><b>Table 2 </b>Query Parameters</caption><thead align="left"><tr><th align="left" class="cellrowborder" valign="top" width="20%" id="mcps1.3.3.4.2.5.1.1"><p>Parameter</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="20%" id="mcps1.3.3.4.2.5.1.2"><p>Mandatory</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="20%" id="mcps1.3.3.4.2.5.1.3"><p>Type</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="40%" id="mcps1.3.3.4.2.5.1.4"><p>Description</p>
</th>
</tr>
</thead>
<tbody><tr><td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.3.4.2.5.1.1 "><p>migrateData</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.3.4.2.5.1.2 "><p>No</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.3.4.2.5.1.3 "><p>String</p>
</td>
<td class="cellrowborder" valign="top" width="40%" headers="mcps1.3.3.4.2.5.1.4 "><p><strong>Definition</strong>:</p>
<p>Whether to migrate data.</p>
<p><strong>Constraints</strong>:</p>
<p>N/A</p>
<p><strong>Value range</strong>:</p>
<ul><li><p>true: Migrate data.</p>
</li><li><p>false: Do not migrate data.</p>
</li></ul>
<p><strong>Default value</strong>:</p>
<p>true</p>
</td>
</tr>
<tr><td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.3.4.2.5.1.1 "><p>agency</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.3.4.2.5.1.2 "><p>No</p>
</td>
<td class="cellrowborder" valign="top" width="20%" headers="mcps1.3.3.4.2.5.1.3 "><p>String</p>
</td>
<td class="cellrowborder" valign="top" width="40%" headers="mcps1.3.3.4.2.5.1.4 "><p><strong>Definition</strong>:</p>
<p>Agency name. You can create an agency to allow CSS to call other cloud services.</p>
<p><strong>Constraints</strong>:</p>
<ul><li><p>VPC permissions required by the agency: "vpc:subnets:get","vpc:ports:*".</p>
</li><li><p>This parameter is mandatory when the new IAM plane is connected. This parameter is optional when the old IAM plane is connected.</p>
</li><li><p>The value can contain only letters (a-z and A-Z), digits (0-9), hyphens (-), and underscores (_). It cannot contain Chinese characters or other special characters.</p>
</li></ul>
<p><strong>Value range</strong>:</p>
<p>N/A</p>
<p><strong>Default value</strong>:</p>
<p>N/A</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section"><h4 class="sectiontitle">Request Parameters</h4><p>None</p>
</div>
<div class="section"><h4 class="sectiontitle">Response Parameters</h4><p><strong>Status code: 200</strong></p>
<p>Request succeeded.</p>
<p>None</p>
</div>
<div class="section"><h4 class="sectiontitle">Example Requests</h4><p>Replace a node.</p>
<pre class="screen">PUT https://{Endpoint}/v1.0/{project_id}/clusters/4f3deec3-efa8-4598-bf91-560aad1377a3/instance/43e63449-339c-4280-a6e9-da36b0685995/replace?migrateData=true</pre>
</div>
<div class="section"><h4 class="sectiontitle">Example Responses</h4><p>None</p>
</div>
<div class="section"><h4 class="sectiontitle">Status Codes</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="UpdateInstance__status_code" frame="border" border="1" rules="all"><thead align="left"><tr><th align="left" class="cellrowborder" valign="top" width="15%" id="mcps1.3.8.2.1.3.1.1"><p>Status Code</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="85%" id="mcps1.3.8.2.1.3.1.2"><p>Description</p>
</th>
</tr>
</thead>
<tbody><tr><td class="cellrowborder" valign="top" width="15%" headers="mcps1.3.8.2.1.3.1.1 "><p>200</p>
</td>
<td class="cellrowborder" valign="top" width="85%" headers="mcps1.3.8.2.1.3.1.2 "><p>Request succeeded.</p>
</td>
</tr>
<tr><td class="cellrowborder" valign="top" width="15%" headers="mcps1.3.8.2.1.3.1.1 "><p>400</p>
</td>
<td class="cellrowborder" valign="top" width="85%" headers="mcps1.3.8.2.1.3.1.2 "><p>Invalid request.</p>
<p>The client should modify the request instead of re-initiating it.</p>
</td>
</tr>
<tr><td class="cellrowborder" valign="top" width="15%" headers="mcps1.3.8.2.1.3.1.1 "><p>404</p>
</td>
<td class="cellrowborder" valign="top" width="85%" headers="mcps1.3.8.2.1.3.1.2 "><p>The requested resource could not be found.</p>
<p>The client should modify the request instead of re-initiating it.</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section"><h4 class="sectiontitle">Error Codes</h4><p>See <a href="css_03_0076.html">Error Codes</a>.</p>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="cluster_management.html">Cluster Management</a></div>
</div>
</div>
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