Function

This API is used to change instance specifications.

URI

POST /v2/{project_id}/rocketmq/instances/{instance_id}/extend

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Definition Project ID. For details about how to obtain it, see Obtaining a Project ID. Constraints N/A Range N/A Default Value N/A
instance_id	Yes	String	Definition Instance ID. You can call the API for querying all instances to obtain the instance ID. The instance ID is in the response body. Constraints N/A Range N/A Default Value N/A

Request Parameters

**Table 2** Request body parameters
Parameter	Mandatory	Type	Description
oper_type	Yes	String	Definition Change type. Constraints N/A Range storage: Expand the storage without changing the broker quantity. horizontal: Scale up the RocketMQ 5.x instance specification. Default Value N/A
new_storage_space	No	Integer	Definition New storage specification Constraints This parameter is valid and mandatory when oper_type is set to storage. If oper_type is set to storage, the storage space of each broker must be expanded by at least 100 GB. If oper_type is set to horizontal, the storage space of each broker remains unchanged. Range N/A Default Value N/A
new_product_id	No	String	Definition New product ID Constraints For RocketMQ 5.x: this parameter is valid and mandatory if oper_type is set to horizontal. Specification changes are only for cluster instances. Range N/A Default Value N/A
publicip_id	No	String	Definition ID of the EIP bound to the instance. Use commas (,) to separate multiple EIP IDs. Constraints This parameter is mandatory when oper_type is horizontal and public access is enabled. Range N/A Default Value N/A

Response Parameters

Status code: 200

**Table 3** Response body parameters
Parameter	Type	Description
job_id	String	Definition ID of the specification modification task. Constraints N/A Range N/A Default Value N/A

Example Requests

Increasing an instance flavor

POST https://{endpoint}/v2/{project_id}/rocketmq/instances/{instance_id}/extend

{
  "oper_type" : "horizontal",
  "new_product_id" : "rocketmq.b2.large.4",
  "new_storage_space" : 1200
}

Expanding instance storage

POST https://{endpoint}/v2/{project_id}/rocketmq/instances/{instance_id}/extend

{
  "oper_type" : "storage",
  "new_storage_space" : 300
}

Example Responses

Status code: 200

Instance specifications changed.

{
  "job_id" : "93b94287-728d-4bb1-a158-cb66cb0854e7"
}

Status Codes

Status Code	Description
200	Instance specifications changed.

Error Codes

See Error Codes.

Changing Instance Specifications