Function

This API is used to modify the specifications of an ECS.

For a running ECS, the system will automatically stop the ECS, copy the ECS data to the target node, which can be the source node, and then restart the ECS.

This API supports automatic rollback if the underlying resources are insufficient.

This API must be used with the API for verifying ECS specifications modification (POST /v2.1/{project_id}/servers/{server_id}/action) or the API for rolling back ECS specifications modification (POST /v2.1/{project_id}/servers/{server_id}/action) if an ECS is detected to be in VERIFY_RESIZE state and its OS-EXT-STS:vm_state is RESIZED.

URI

POST /v2.1/{project_id}/servers/{server_id}/action

POST /v2/{project_id}/servers/{server_id}/action

Table 1 describes the parameters in the URI.

**Table 1** Parameter description
Parameter	Mandatory	Description
project_id	Yes	Specifies the project ID.
server_id	Yes	Specifies the ECS ID.

Request

Table 2 describes the request parameters.

**Table 2** Request parameters
Parameter	Mandatory	Type	Description
resize	Yes	Object	For details about how to modify ECS specifications, see Table 3.

**Table 3** **resize** field description
Parameter	Mandatory	Type	Description
flavorRef	Yes	String	Specifies the new flavor ID or URI.

Response

None

Example Request

POST https://{endpoint}/v2/{project_id}/servers/{server_id}/action
POST https://{endpoint}/v2.1/{project_id}/servers/{server_id}/action

{
    "resize" : {
        "flavorRef" : "s3.medium.2"
    }
}

Example Response