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wanghuijuan738 effc5e0a2f ECS API 250919 verison. Updating dependent actions.

Reviewed-by: Pristromskaia, Margarita <margarita.pristromskaia@t-systems.com>
Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: wanghuijuan738 <wanghuijuan738@huawei.com>
Co-committed-by: wanghuijuan738 <wanghuijuan738@huawei.com>

2025-11-14 18:58:00 +00:00

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Modifying the Specifications of an ECS

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 cannot be used independently. The VM status needs to be queried in polling mode. When status is VERIFY_RESIZE, OS-EXT-STS:task_state is "", and OS-EXT-STS:vm_state is RESIZED, this API must be used together with Confirming the Specifications Modification of an ECS (POST /v2.1/{project_id}/servers/{server_id}/action) or Rolling Back ECS Specifications Modification (POST /v2.1/{project_id}/servers/{server_id}/action).

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 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

Change the flavor of a specified ECS to s3.medium.2.

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

None

Returned Values

See Returned Values for General Requests.

Parent topic: Status Management

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