Manually Switching Primary/Standby DB Instances

Function

This API is used to manually switch primary/standby DB instances as required.

Before calling an API, you need to understand the API in Authentication.

Constraints

This API is supported for MySQL and PostgreSQL.
This API is supported for primary/standby DB instances only.
Primary/standby DB instances cannot be manually switched if they are in any of the following statuses:
- For MySQL and PostgreSQL: creating, rebooting, upgrading, changing instance class, restoring, changing port, or creating database account
- For MySQL: deleting database account

URI

URI format
PUT /v3/{project_id}/instances/{instance_id}/failover
Example
https://{Endpoint}/v3/0483b6b16e954cb88930a360d2c4e663/instances/dsfae23fsfdsae3435in01/failover

Parameter description

**Table 1** Parameter description
Name	Mandatory	Description
project_id	Yes	Specifies the project ID of a tenant in a region. For details about how to obtain the project ID, see Obtaining a Project ID.
instance_id	Yes	Specifies the DB instance ID.

Request

Parameter description
None

Request example
```
{}
```

Response

Normal response

Name	Description
workflowId	Indicates the workflow ID.
instanceId	Indicates the DB instance ID.
nodeId	Indicates the node ID.

Example normal response

{
    "workflowId":"072beb09-0573-40bf-bfe8-4be5cec9e85a",
    "instanceId":"794c38e5309344818f4b33b86ebce9b4in03",
    "nodeId":"b94ba815747040f1b0d641cd13364a06no03"
}