Querying the Target ECS Flavors to Which a Flavor Can Be Changed

Function

An ECS flavor cannot be changed to certain flavors. This API is used to query the target flavors to which a specified ECS flavor can be changed.

URI

GET /v1/{project_id}/cloudservers/resize_flavors?instance_uuid={instance_uuid}&source_flavor_id={source_flavor_id}&source_flavor_name={source_flavor_name}

Table 1 describes the parameters in the URI.

**Table 1** Path parameters
Parameter	Mandatory	Description
project_id	Yes	Specifies the project ID. For details about how to obtain the ID, see Obtaining a Project ID.

One of the instance_uuid, source_flavor_id, and source_flavor_name parameters must be configured. If multiple parameters are configured, the system processes the instance_uuid, source_flavor_id, and source_flavor_name parameters in descending order by default.

If instance_uuid is used to query the flavors that can be changed to, only the flavors supporting the image based on which the target ECS is created are returned. The reason is as follows: Images rely on flavors. If an ECS is created using a public image, the API filters the flavors supported by the image.

Table 2 describes the request parameters.

**Table 2** Query parameters
Parameter	Mandatory	Type	Description
instance_uuid	No	String	Specifies the target ECS ID in UUID format.
source_flavor_id	No	String	Specifies the source flavor ID.
source_flavor_name	No	String	Specifies the source flavor name.
sort_key	No	String	Indicates the field for sorting. The default value is flavorid. Options: flavorid: indicates the flavor ID. name: indicates the flavor name. memory_mb: indicates the memory size. vcpus: indicates the number of vCPUs. root_gb: indicates the system disk size.
sort_dir	No	String	Specifies the ascending (asc) or descending (desc) sorting. Options: asc: indicates the ascending order. desc: indicates the descending order.
limit	No	Integer	Specifies the maximum number of flavors that can be displayed on one page. The default value is 1,000.
marker	No	String	Specifies the ID of the last flavor on each page as the paging marker.

Request

None

Response

Table 3 describes the response parameters.

**Table 3** Response parameters
Parameter	Type	Description
flavors	Array of objects	Specifies ECS flavors. For details, see Table 4.

**Table 4** **flavors** field description
Parameter	Type	Description
id	String	Specifies the ECS flavor ID.
name	String	Specifies the ECS flavor name.
vcpus	String	Specifies the number of vCPUs in the ECS flavor.
ram	Integer	Specifies the memory size (MB) in the ECS flavor.
disk	String	Specifies the system disk size in the ECS flavor. This parameter has not been used. Its default value is 0.
swap	String	Specifies the swap partition size required by the ECS flavor. This parameter has not been used. Its default value is "".
OS-FLV-EXT-DATA:ephemeral	Integer	Specifies the temporary disk size. This is an extended attribute. This parameter has not been used. Its default value is 0.
OS-FLV-DISABLED:disabled	Boolean	Specifies whether the ECS flavor has been disabled. This is an extended attribute. This parameter has not been used. Its default value is false.
rxtx_factor	Float	Specifies the ratio of the available network bandwidth to the network hardware bandwidth of the ECS. This parameter has not been used. Its default value is 1.
rxtx_quota	String	Specifies the software constraints of the network bandwidth that can be used by the ECS. This parameter has not been used. Its default value is null.
rxtx_cap	String	Specifies the hardware constraints of the network bandwidth that can be used by the ECS. This parameter has not been used. Its default value is null.
os-flavor-access:is_public	Boolean	Specifies whether a flavor is available to all tenants. This is an extended attribute. true: indicates that a flavor is available to all tenants. false: indicates that a flavor is available only to certain tenants. Default value: true
links	Array of objects	Specifies the shortcut link of the ECS flavor. For details, see Table 5.
extra_specs	Object	Specifies the extended field of the ECS specifications. For details, see Table 6.
instance_quota	Object	This is a reserved parameter.

**Table 5** **links** field description
Parameter	Type	Description
rel	String	Specifies the shortcut link marker name.
href	String	Provides the shortcut link.
type	String	Specifies the shortcut link type. This parameter has not been used. Its default value is null.

Example Request

Query the flavors that the ECS flavor c3.xlarge.2 can be changed to.

GET https://{endpoint}/v1/{project_id}/cloudservers/resize_flavors?source_flavor_id=c3.xlarge.2

Example Response

{
    "flavors": [
        {
            "id": "c3.15xlarge.2",
            "name": "c3.15xlarge.2",
            "vcpus": "60",
            "ram": 131072,
            "disk": "0",
            "swap": "",
            "links": [
                {
                    "rel": "self",
                    "href": "https://ecs.region.xxx.com/v1.0/743b4c0428d94531b9f2add666642e6b/flavors/c3.15xlarge.2",
                    "type": null
                },
                {
                    "rel": "bookmark",
                    "href": "https://ecs.region.xxx.com/743b4c0428d94531b9f2add666642e6b/flavors/c3.15xlarge.2",
                    "type": null
                }
            ],
            "OS-FLV-EXT-DATA:ephemeral": 0,
            "rxtx_factor": 1,
            "OS-FLV-DISABLED:disabled": false,
            "rxtx_quota": null,
            "rxtx_cap": null,
            "os-flavor-access:is_public": true,
            "extra_specs": {
                "ecs:virtualization_env_types": "CloudCompute",
                "ecs:generation": "c3",
                "ecs:performancetype": "computingv3",
                "resource_type": "IOoptimizedC3_2"
             }
        }
    ]
}