Help Center/ Elastic Cloud Server/ API Reference/ OpenStack Nova APIs/ Metadata Management/ Modifying ECS Metadata with a Specified Key
Updated on 2022-09-23 GMT+08:00

Modifying ECS Metadata with a Specified Key

Function

This API is used to modify the ECS metadata with a specified key.

  • If the metadata does not contain the target field, the field is automatically added.
  • If the metadata contains the target field, the field value is automatically updated.

Constraints

An ECS must be in active, stopped, paused, or suspended state, which is specified by OS-EXT-STS:vm_state.

URI

PUT /v2.1/{project_id}/servers/{server_id}/metadata/{key}

Table 1 describes the parameters in the URI.
Table 1 Parameter description

Parameter

Mandatory

Description

project_id

Yes

Specifies the project ID.

For details about how to obtain the ID, see Obtaining a Project ID.

server_id

Yes

Specifies the ECS ID.

key

Yes

Specifies the ECS metadata key.

Request

Table 2 describes the request parameters.

Table 2 Request parameters

Parameter

Mandatory

Type

Description

meta

Yes

Object

Specifies the user-defined metadata key pair.

For a metadata key:

It contains a maximum of 255 Unicode characters and cannot be left blank. A key can contain uppercase letters (A-Z), lowercase letters (a-z), digits (0-9), hyphens (-), underscores (_), colons (:), and periods (.).

For a metadata value:

It contains a maximum of 255 Unicode characters.

Response

Table 3 describes the response parameters.
Table 3 Response parameters

Parameter

Type

Description

meta

Object

Specifies the user-defined metadata key-value pair.

Example Request

PUT https://{endpoint}/v2.1/{project_id}/servers/{server_id}/metadata/{key}
{
    "meta":{
        "key":"value"
    }
} 

Example Response

{
    "meta":{
        "key":"value"
    }
}