Attaching a Disk to an ECS¶

Scenarios¶

If the existing disks of an ECS fail to meet service requirements, for example, due to insufficient disk space or poor disk performance, you can attach more available disks to the ECS, or call the EVS disk creation API to create disks and attach them to the ECS. To attach an EVS disk to an ECS, you need to call the required API.

Note

You can attach a data disk by setting the data_volumes parameter during ECS creation or attach a data disk after the ECS is created. This section describes how to attach a disk to a created ECS.

Involved APIs¶

Attaching a disk involves the following APIs:

API for creating an EVS disk
API for attaching a disk to an ECS
API for viewing disks attached to an ECS

Procedure¶

Create an EVS disk.

API
URI format: POST /v2/{tenant_id}/volumes
For details, see section "Creating an EVS Disk (Native OpenStack API v2)" in Elastic Cloud Server API Reference.

Request example

POST: https://{endpoint}/v2/74610f3a5ad941998e91f076297ecf27/volumes

Obtain the endpoint from Regions and Endpoints.

Body

{
    "volume": {
        "name": "openapi_vol02",
        "availability_zone": "eu-de-01",
        "description": "create for api test",
        "volume_type": "SATA",
        "size": 40
    }
}

Response example

{
  "volume": {
    "status": "creating",
    "user_id": "f79791beca3c48159ac2553fff22e166",
    "attachments": [],
    "links": [
      {
        "href": "https://xxx/v2/74610f3a5ad941998e91f076297ecf27/volumes/51f45e08-1d4f-44c6-a4a9-84a488e0e8d3",
        "rel": "self"
      },
      {
        "href": "https://xxx/74610f3a5ad941998e91f076297ecf27/volumes/51f45e08-1d4f-44c6-a4a9-84a488e0e8d3",
        "rel": "bookmark"
      }
    ],
    "availability_zone": "eu-de-01",
    "bootable": "false",
    "encrypted": false,
    "created_at": "2018-05-16T11:19:33.992984",
    "description": "create for api test",
    "updated_at": null,
    "volume_type": "SATA",
    "name": "openapi_vol02",
    "replication_status": "disabled",
    "consistencygroup_id": null,
    "source_volid": null,
    "snapshot_id": null,
    "shareable": false,
    "multiattach": false,
    "metadata": {
      "__system__volume_name": "openapi_vol02"
    },
    "id": "51f45e08-1d4f-44c6-a4a9-84a488e0e8d3",
    "size": 40
  }
}

Record the volume ID in the response.

Attach the disk to the ECS.

API
URI format: POST /v2/{tenant_id}/servers/{server_id}/os-volume_attachments
For details, see section "Attaching a Disk to an ECS" in Elastic Cloud Server API Reference.
Request example
https://{endpoint}/v2/74610f3a5ad941998e91f076297ecf27/servers/9f4d9281-95e7-4915-a126-1ee597101e2e/os-volume_attachments
Obtain the endpoint from Regions and Endpoints.
Body
```
{
    "volumeAttachment": {
        "volumeId": "51f45e08-1d4f-44c6-a4a9-84a488e0e8d3",
        "device": "/dev/sdb"
    }
}
```

Response example

{
  "volumeAttachment": {
    "id": "51f45e08-1d4f-44c6-a4a9-84a488e0e8d3",
    "volumeId": "51f45e08-1d4f-44c6-a4a9-84a488e0e8d3",
    "serverId": "9f4d9281-95e7-4915-a126-1ee597101e2e",
    "device": "/dev/sdb"
  }
}

Verify the disk attachment.

API
URI format: GET /v2/{tenant_id}/servers/{server_id}/os-volume_attachments
For details, see section "Querying Disks Attached to an ECS" in Elastic Cloud Server API Reference.
Request example
https://{endpoint}/v2/74610f3a5ad941998e91f076297ecf27/servers/9f4d9281-95e7-4915-a126-1ee597101e2e/os-volume_attachments
Obtain the endpoint from Regions and Endpoints.

Response example

{
  "volumeAttachments": [
    {
      "volumeId": "4fc0b4cc-9d6c-431c-be70-3dfeec2ff6e0",
      "id": "4fc0b4cc-9d6c-431c-be70-3dfeec2ff6e0",
      "device": "/dev/sda",
      "serverId": "9f4d9281-95e7-4915-a126-1ee597101e2e"
    },
    {
      "volumeId": "51f45e08-1d4f-44c6-a4a9-84a488e0e8d3",
      "id": "51f45e08-1d4f-44c6-a4a9-84a488e0e8d3",
      "device": "/dev/sdb",
      "serverId": "9f4d9281-95e7-4915-a126-1ee597101e2e"
    }
  ]
}

last updated: 2024-04-24 02:16