Promoting a Read Replica to Primary

Function

This API is used to promote a read replica to the primary node. Before calling this API:

Learn how to authorize and authenticate it.
Obtain the required region and endpoint.

URI

PUT /v3/{project_id}/instances/{instance_id}/switchover

**Table 1** URI parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID of a tenant in a region. To obtain this value, see Obtaining a Project ID.
instance_id	Yes	String	Instance ID, which is compliant with the UUID format.

Request Parameters

**Table 2** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	User token. It can be obtained by calling the IAM API used to obtain a user token. The value of X-Subject-Token in the response header is the token value.
X-Language	No	String	Request language type. The default value is en-us. Values: en-us zh-cn

**Table 3** Request body parameter
Parameter	Mandatory	Type	Description
node_id	Yes	String	ID of the read replica that will be promoted to the primary.

Response Parameters

Status code: 200

**Table 4** Response body parameter
Parameter	Type	Description
job_id	String	Task ID.

Status code: 400

**Table 5** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error message.

Status code: 500

**Table 6** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error message.

Example Request

Promoting a read replica to primary

PUT https://{endpoint}/v3/056538411200d4cd2f79c003c7606412/instances/096c0fc43e804757b59946b80dc27f8bin07/switchover
{
  "node_id" : "1801a615b52b4a5697cfe385f6affbf4no07"
}

Example Response

Status code: 200

Success.

{
  "job_id" : "e0fbbfc8-1ac4-4721-b9e9-7dd685c5bdd7"
}

Status Code

For details, see Status Codes.

Error Code

For details, see Error Codes.

Parent topic: Instance Management

Previous topic: Unbinding an EIP

Next topic: Changing a Maintenance Window

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