Pausing and Deleting a Migration Task

Scenarios

This section describes how to pause and delete a migration task by calling APIs. For details, see Calling APIs.

Before deleting a migration task, you need to obtain a token and pause the migration task. After the migration task is paused, you need to query the task status. The migration task can be deleted only after it is paused.

Involved APIs

Obtaining a User Token Through Password Authentication: This API is used to obtain a user token for authentication.
Managing Migration Tasks (Pause): This API is used to pause a migration task with a specified ID.
Querying a Migration Task: This API is used to query the details of a migration task with a specified ID to check whether the migration task is successfully paused.
Deleting a Migration Task: This API is used to delete a migration task with a specified ID.

Procedure

Obtain an IAM user token.

API
URI format: POST /v3/auth/tokens

For details, see Obtaining a User Token Through Password Authentication.

Example request

POST: https://{iam_endpoint}/v3/auth/tokens

Obtain {endpoint} from Regions and Endpoints.

Body:

{
    "auth": {
        "identity": {
            "methods": [
                "password"
            ],
            "password": {
                "user": {
                    "name": "testname",
                    "domain": {
                        "name": "testname"
                    },
                    "password": "Password"
                }
            }
        },
        "scope": {
            "project": {
                "id": "0215ef11e49d4743be23dd97a1561xxx"
            }
        }
    }
}

In the response header, the value of X-Subject-Token is the token.

X-Subject-Token: MIIDkgYJKoZIhvcNAQcCoIIDgzCCA38CAQExDTALBglghkgBZQMEAgEwgXXXXX...

Pause the desired migration task.

API
URI format:
```
POST /v3/tasks/{task_id}/action
```
For details, see Managing Migration Tasks (Pause).

Example request

POST  https://sms.myhuaweicloud.eu/v3/tasks/8abda8635e09d185015e09d188dd0001xx/action

Header:

Content-Type: application/json
X-Auth-Token: "Token"

Body:

{
        "operation" : "stop"
}

If the response code is 200, the API is successfully called.

View the migration task status.

API
URI format:
```
GET /v3/tasks/{task_id}
```
For details, see Querying a Migration Task.

Example request

GET  https://sms.myhuaweicloud.eu/v3/tasks/8abda8635e09d185015e09d188dd0001xx

Header:

Content-Type: application/json
X-Auth-Token: "Token"

Example response

{
 "id": "8abda8635e09d185015e09d188dd0001xx",
 "name": "MigrationTask",
 "type": "MIGRATE_FILE",
 "os_type": "LINUX",
 "state": "ABORT",
 "estimate_complete_time": 1600391014000,
 "create_date": 1600159831000,
 "start_date": 1600159831000,
 "finish_date": 1600343128000,
 "priority": 1,
 "speed_limit": 0,
 "migrate_speed": 0,
 "start_target_server": true,
 "error_json": "",
 "total_time": 935000,
 "float_ip": "192.168.0.xxx",
 "migration_ip": "192.168.0.xxx",
 "vm_template_id": null,
 "region_name": "region_name",
 "region_id": "region_id",
 "project_name": ""project_name",
 "project_id": "05825205120026802ff0c01721bc1xxx",
 "sub_tasks": [
  {
   "id": 3514,
   "name": "SSL_CONFIG",
   "progress": 100,
   "start_date": 1600159847000,
   "end_date": 1600159851000,
   "user_op": "REPLICATE"
  },
  {
   "id": 3515,
   "name": "ATTACH_AGENT_IMAGE",
   "progress": 100,
   "start_date": 1600159851000,
   "end_date": 1600160027000,
   "user_op": "REPLICATE"
  },
  {
   "id": 3516,
   "name": "FORMAT_DISK_LINUX_FILE",
   "progress": 100,
   "start_date": 1600160027000,
   "end_date": 1600160030000,
   "user_op": "REPLICATE"
  },
  {
   "id": 3517,
   "name": "MIGRATE_LINUX_FILE",
   "progress": 100,
   "start_date": 1600160080000,
   "end_date": 1600160088000,
   "user_op": "REPLICATE"
  },
  {
   "id": 3582,
   "name": "CONFIGURE_LINUX_FILE",
   "progress": 100,
   "start_date": 1600333914000,
   "end_date": 1600334025000,
   "user_op": "CUTOVER0"
  },
  {
   "id": 3583,
   "name": "DETTACH_AGENT_IMAGE",
   "progress": 100,
   "start_date": 1600334029000,
   "end_date": 1600334103000,
   "user_op": "CUTOVER0"
  },
  {
   "id": 3584,
   "name": "SSL_CONFIG",
   "progress": 100,
   "start_date": 1600334185000,
   "end_date": 1600334188000,
   "user_op": "RESYNC0"
  },
  {
   "id": 3585,
   "name": "ATTACH_AGENT_IMAGE",
   "progress": 100,
   "start_date": 1600334189000,
   "end_date": 1600334375000,
   "user_op": "RESYNC0"
  },
  {
   "id": 3586,
   "name": "SYNC_LINUX_FILE",
   "progress": 100,
   "start_date": 1600334375000,
   "end_date": 1600334376000,
   "user_op": "RESYNC0"
  },
  {
   "id": 3587,
   "name": "CONFIGURE_LINUX_FILE",
   "progress": 100,
   "start_date": 1600342952000,
   "end_date": 1600343052000,
   "user_op": "CUTOVER1"
  },
  {
   "id": 3588,
   "name": "DETTACH_AGENT_IMAGE",
   "progress": 100,
   "start_date": 1600343056000,
   "end_date": 1600343128000,
   "user_op": "CUTOVER1"
  },
  {
   "id": 3589,
   "name": "SSL_CONFIG",
   "progress": 100,
   "start_date": 1600390756000,
   "end_date": 1600390760000,
   "user_op": "RESYNC1"
  },
  {
   "id": 3590,
   "name": "ATTACH_AGENT_IMAGE",
   "progress": 100,
   "start_date": 1600390760000,
   "end_date": 1600390953000,
   "user_op": "RESYNC1"
  },
  {
   "id": 3591,
   "name": "SYNC_LINUX_FILE",
   "progress": 100,
   "start_date": 1600390954000,
   "end_date": 1600390954000,
   "user_op": "RESYNC1"
  }
 ],
 "source_server": {
  "id": "621f2cb5-ba4f-4819-b00d-ee48ca2c35ea",
  "ip": "192.168.0.176",
  "name": "ecs-4bb4",
  "os_type": "LINUX",
  "os_version": "CENTOS_7_6_64BIT",
  "oem_system": false,
  "state": "syncing",
  "migration_cycle": "syncing"
 },
 "target_server": {
  "id": "de35f45d-b6d5-4769-9148-984c8fab4xxx",
  "vm_id": "6d51477f-0a02-4917-8d7d-b13969f4axxx",
  "name": "ecs-4bb4",
  "ip": null,
  "os_type": "LINUX",
  "os_version": null,
  "system_dir": null,
  "disks": [
   {
    "id": 86364,
    "name": "/dev/sda",
    "relation_name": "/dev/vda",
    "disk_id": "ed3c78d0-3166-48d1-bee0-d29e7d834xxx",
    "partition_style": "MBR",
    "size": 42949672960,
    "used_size": 42948624384,
    "device_use": "BOOT",
    "os_disk": false,
    "physical_volumes": [
     {
      "id": 132594,
      "uuid": null,
      "index": 0,
      "name": "/dev/sda1",
      "relation_name": "/dev/vda1",
      "device_use": "OS",
      "file_system": "ext4",
      "mount_point": "/",
      "size": 42948624384,
      "used_size": 2467393536,
      "free_size": 40481230848
     }
    ],
    "disk_index": "z"
   }
  ],
  "volume_groups": [],
  "image_disk_id": "9700f5ce-02ae-4a71-a057-deffe9b69xxx",
  "rollback_snapshot_ids": null
 },
 "clone_server": null,
 "target_snapshot_id": null,
 "remain_seconds": 60000
}

state indicates the task execution status. ABORT indicates that the task has been paused.

Delete the migration task.
- API
  URI format:
```
DELETE /v3/tasks/{task_id}
```
  For details, see Deleting a Migration Task.
- Example request
```
https://sms.myhuaweicloud.eu/v3/tasks/8abda8635e09d185015e09d188dd0001xx
```
  Header:
```
Content-Type: application/json
X-Auth-Token: "Token"
```
  If the response code is 200, the migration task has been deleted successfully.