Changing an ECS OS (Using an Image Without Cloud-Init Installed)

Function

This API is used to change the OS of an ECS.

After this API is called, the system uninstalls the system disk, uses the new image to create a system disk, and attaches it to the ECS. In this way, the OS is changed.

This API supports the images without Cloud-Init or Cloudbase-Init installed. Otherwise, use the API described in Changing an ECS OS (Using an Image with Cloud-Init Installed).

Constraints

Only a stopped ECS or an ECS on which reinstalling or changing the OS failed supports changing OS.
Only an ECS with a system disk supports changing OS.
You are not allowed to perform other operations when changing the OS. Otherwise, changing the OS will fail.

URI

POST /v1/{project_id}/cloudservers/{server_id}/changeos

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.

Request

Table 2 describes the request parameters.

Table 2 Request parameters
Parameter	Mandatory	Type	Description
os-change	Yes	Object	Changes the OS of an ECS. For details, see Table 3.

Table 3 os-change field description
Parameter	Mandatory	Type	Description
adminpass	No	String	Specifies the initial password of the ECS administrator. The Windows administrator username is Administrator, and the Linux administrator username is root. Password complexity requirements: 8 to 26 characters The password must contain at least three of the following character types: uppercase letters, lowercase letters, digits, and special characters (!@$%^-_=+[{}]:,./?~#*). NOTE: You can only log in to a Windows ECS using a username and password, and the password cannot contain the username, the username in reverse, or more than two characters in the same sequence as they appear in the username. Either adminpass or keyname is empty. Either adminpass or keyname is set.
keyname	No	String	Specifies the key name.
userid	No	String	Specifies the user ID. When the keyname parameter is being specified, the value of this parameter is used preferentially. If this parameter is left blank, the user ID in the token is used by default.
imageid	Yes	String	Specifies the ID of the new image in UUID format. You can obtain the image ID from the console or by following the instructions provided in "Querying Images" in Image Management Service API Reference.

Response

For details, see Responses (Task).

Example Request

POST https://{endpoint}/v1/{project_id}/cloudservers/{server_id}/changeos

{
    "os-change": {
        "keyname": "KeyPair-350b", 
        "userid": "7e25b1da389f4697a79df3a0e5bd494e", 
        "imageid": "e215580f-73ad-429d-b6f2-5433947433b0"
    }
}

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Changing an ECS OS (Using an Image Without Cloud-Init Installed)

Function

Constraints

URI

Request

Response

Example Request

Example Response

Returned Values

Error Codes