Replacing a Node

Function

This API is used to replace a failed node.

If a node in an Elasticsearch cluster is faulty, you can replace it to restore services.

The node replacement process is as follows:

  1. Migrate data from the node that needs to be replaced to other available nodes.

  2. Rebuild the node using the original ID, IP address, specifications, and AZ.

  3. Add the new node into the cluster. The system automatically triggers a shard reallocation, migrating some of the shards

to the new node

This process does not interrupt services because data is migrated from the replaced node to other available nodes.

All mission-critical data has been backed up before a node replacement. This is to prevent data loss.

Calling Method

For details, see Calling APIs.

URI

PUT /v1.0/{project_id}/clusters/{cluster_id}/instance/{instance_id}/replace

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Definition:

Project ID. For details about how to obtain the project ID and name, see Obtaining the Project ID and Name.

Constraints:

N/A

Value range:

Project ID of the account.

Default value:

N/A

cluster_id

Yes

String

Definition:

ID of the cluster where nodes are to be replaced. For details about how to obtain the cluster ID, see Obtaining the Cluster ID.

Constraints:

N/A

Value range:

Cluster ID.

Default value:

N/A

instance_id

Yes

String

Definition:

ID of the node to be replaced.

Constraints:

N/A

Value range:

Node ID. Obtain the ID attribute in instances by referring to Querying Cluster Details.

Default value:

N/A
Table 2 Query Parameters

Parameter

Mandatory

Type

Description

migrateData

No

String

Definition:

Whether to migrate data.

Constraints:

N/A

Value range:

  • true: Migrate data.

  • false: Do not migrate data.

Default value:

true

agency

No

String

Definition:

Agency name. You can create an agency to allow CSS to call other cloud services.

Constraints:

  • VPC permissions required by the agency: "vpc:subnets:get","vpc:ports:*".

  • This parameter is mandatory when the new IAM plane is connected. This parameter is optional when the old IAM plane is connected.

  • 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.

Value range:

N/A

Default value:

N/A

Request Parameters

None

Response Parameters

Status code: 200

Request succeeded.

None

Example Requests

Replace a node.

PUT https://{Endpoint}/v1.0/{project_id}/clusters/4f3deec3-efa8-4598-bf91-560aad1377a3/instance/43e63449-339c-4280-a6e9-da36b0685995/replace?migrateData=true

Example Responses

None

Status Codes

Status Code

Description

200

Request succeeded.

400

Invalid request.

The client should modify the request instead of re-initiating it.

404

The requested resource could not be found.

The client should modify the request instead of re-initiating it.

Error Codes

See Error Codes.

Parent topic: Cluster Management