Help Center/ Elastic Cloud Server/ API Reference (Ankara Region)/ APIs (Recommended)/ Status Management/ Reinstalling an ECS OS (Using an Image Without Cloud-Init Installed)
Updated on 2024-04-16 GMT+08:00
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Reinstalling an ECS OS (Using an Image Without Cloud-Init Installed)

Function

This API is used to reinstall an ECS OS.

This API is an asynchronous API. After the OS reinstallation request is successfully delivered, a job ID is returned. This does not mean the reinstallation is complete. You need to call the API by referring to Querying Task Execution Status to query the job status. The SUCCESS status indicates that the reinstallation is successful.

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

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

Constraints

  • You cannot reinstall OS on an ECS that does not have the system disk.
  • You are not allowed to perform other operations when reinstalling the OS. Otherwise, reinstalling the OS will fail.

URI

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

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-reinstall

Yes

Object

Reinstall the ECS. For details, see Table 3.
Table 3 os-reinstall field description

Parameter

Mandatory

Type

Description

keyname

Yes

String

Specifies the key name.

userid

Yes

String

Specifies the user ID.

metadata

No

Object

Specifies the metadata of the ECS for which the OS is to be reinstalled.

For more information, see Table 4.

mode

No

String

Specifies whether the ECS supports OS reinstallation when the ECS is running.

If the parameter value is withStopServer, the ECS supports OS reinstallation when the ECS is running. In such a case, the system automatically stops the ECS before reinstalling its OS.
Table 4 metadata field description

Parameter

Mandatory

Type

Description

BYOL

No

String

Specifies whether a user has the license of an image.

  • If this parameter is set to true, the license file delivered with the image is used, indicating that BYOL is used.
  • If this parameter is set to a value other than true, BYOL is not used, and the license file provided by the cloud platform must be used.

The default value is not true, indicating that BYOL is not used.

Response

For details, see Responses (Task).

Example Request

Reinstall an OS and use the key pair for login authentication after the reinstallation.

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

{
    "os-reinstall": {
        "keyname": "KeyPair-350b", 
        "userid": "7e25b1da389f4697a79df3a0e5bd494e"
    }
}

Example Response

See Responses (Task).

{      
    "job_id": "ff80808288d41e1b018990260955686a" 
}

Returned Values

See Returned Values for General Requests.

Error Codes

See Error Codes.

Parent topic: Status Management