doc-exports/docs/gaussdb_mysql/api-ref/gaussdb_11_0015.html

Creating a Read Replica

Function

This API is used to create a read replica. Before calling this API:

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

URI

• URI format

  POST https://{endpoint}/mysql/v3/{project_id}/instances/{instance_id}/nodes/enlarge

• Example

  POST https://gaussdb-mysql.eu-de.otc.t-systems.com/mysql/v3/0483b6b16e954cb88930a360d2c4e663/instances/dsfae23fsfdsae3435in01/nodes/enlarge

• Parameter description

  Table 1 Parameter description

  Name	Mandatory	Description
  project_id	Yes	Project ID of a tenant in a region. To obtain this value, see Obtaining a Project ID.
  instance_id	Yes	DB 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.
X-Language	No	String	Language.
Content-Type	Yes	String	MIME type of the request body. You are advised to use the default value application/json. For APIs used to upload objects or images, the value can vary depending on the flow type.

Table 3 Request body parameters

Parameter	Mandatory	Type	Description
priorities	Yes	Array of integers	Read replica failover priority ranging from 1 to 16. The total number of the primary node and read replicas is up to 16.

Response Parameters

Status code: 201

Table 4 Response body parameters

Parameter	Type	Description
instance_id	String	DB instance ID.
node_names	Array of strings	Node name list
job_id	String	ID of the task for creating a DB instance. This parameter is returned only when pay-per-use DB instances are created.
order_id	String	Order ID. This parameter is returned only when yearly/monthly instances are created.

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

Creating a read replica

POST https://gaussdb-mysql.eu-de.otc.t-systems.com/mysql/v3/0483b6b16e954cb88930a360d2c4e663/instances/ba62a0b83a1b42bfab275829d86ac0fdin07/nodes/enlarge
{
  "priorities" : [ 1, 2 ]
}

Example Response

Status code: 201

Success.

{
  "instance_id" : "f381d0b539e644df8f5b0d3a62129515in07",
  "node_names" : [ "gauss-ccf5_node03" ],
  "job_id" : "dff1d289-4d03-4942-8b9f-463ea07c000d"
}

Status Code

For details, see Status Codes.

Error Code

For details, see Error Codes.

Parent topic: Instance Management