# Starting a BMS (Native OpenStack API)

#### Function

This API is used to start a single BMS.

#### URI

POST /v2.1/{project_id}/servers/{server_id}/action

Table 1 lists the parameters.

Table 1 Parameter description
Parameter | Mandatory | Description
--- | --- | ---
project_id | Yes | Specifies the project ID. For how to obtain the project ID, see Obtaining Required Information.
server_id | Yes | Specifies the BMS ID. You can obtain the BMS ID from the BMS console or using the Querying BMSs (Native OpenStack API) API.

#### Request

- Request parameters

  Parameter | Mandatory | Type | Description
  --- | --- | --- | ---
  os-start | Yes | null | Specifies the operation of starting the BMS. The data structure is empty.

- Example request

      1

      POST https://{ECS Endpoint}/v2.1/c685484a8cc2416b97260938705deb65/servers/95bf2490-5428-432c-ad9b-5e3406f869dd/action

      1
      2
      3

      {
          "os-start": {}
                          }

#### Response

N/A

#### Returned Values

Normal values

Returned Values | Description
--- | ---
204 | The server has processed the request but did not return any content.

For details about other returned values, see Status Codes.

#### Error Codes

See Error Codes.

Parent topic: BMS Status Management