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Maintain DM Clusters Using OpenAPI
Learn about how to use OpenAPI interface to manage the cluster status and data replication.

Maintain DM Clusters Using OpenAPI

Warning:

DM OpenAPI is still an experimental feature and disabled by default. It is not recommended to use it in a production environment.

DM provides the OpenAPI feature for querying and operating the DM cluster, which is similar to the feature of dmctl tools. If you need to enable this feature, add the following configuration in the DM-master configuration file:

[experimental]
openapi = true

Note:

  • DM provides the specification document that meets the OpenAPI 3.0.0 standard. This document contains all the request parameters and returned values. You can copy the document yaml and preview it in Swagger Editor.

  • After you deploy the DM-master nodes, you can access http://{master-addr}/api/v1/docs to preview the documentation online.

You can use the APIs to perform the following maintenance operations on the DM cluster:

APIs for managing clusters

APIs for managing data sources

APIs for managing replication tasks

The following sections describe the specific usage of the APIs.

API error message template

After sending an API request, if an error occurs, the returned error message is in the following format:

{
    "error_msg": "",
    "error_code": ""
}

From the above JSON output, error_msg describes the error message and error_code is the corresponding error code.

Get the information of a DM-master node

This API is a synchronous interface. If the request is successful, the information of the corresponding node is returned.

Request URI

GET /api/v1/cluster/masters

Example

{{< copyable "shell-regular" >}}

curl -X 'GET' \
  'http://127.0.0.1:8261/api/v1/cluster/masters' \
  -H 'accept: application/json'
{
  "total": 1,
  "data": [
    {
      "name": "master1",
      "alive": true,
      "leader": true,
      "addr": "127.0.0.1:8261"
    }
  ]
}

Stop a DM-master node

This API is a synchronous interface. If the request is successful, the status code of the returned body is 204.

Request URI

DELETE /api/v1/cluster/masters/{master-name}

Example

{{< copyable "shell-regular" >}}

curl -X 'DELETE' \
  'http://127.0.0.1:8261/api/v1/cluster/masters/master1' \
  -H 'accept: */*'

Get the information of a DM-worker node

This API is a synchronous interface. If the request is successful, the information of the corresponding node is returned.

Request URI

GET /api/v1/cluster/workers

Example

{{< copyable "shell-regular" >}}

curl -X 'GET' \
  'http://127.0.0.1:8261/api/v1/cluster/workers' \
  -H 'accept: application/json'
{
  "total": 1,
  "data": [
    {
      "name": "worker1",
      "addr": "127.0.0.1:8261",
      "bound_stage": "bound",
      "bound_source_name": "mysql-01"
    }
  ]
}

Stop a DM-worker node

This API is a synchronous interface. If the request is successful, the status code of the returned body is 204.

Request URI

DELETE /api/v1/cluster/workers/{worker-name}

Example

{{< copyable "shell-regular" >}}

curl -X 'DELETE' \
  'http://127.0.0.1:8261/api/v1/cluster/workers/worker1' \
  -H 'accept: */*'

Create a data source

This API is a synchronous interface. If the request is successful, the information of the corresponding data source is returned.

Request URI

POST /api/v1/sources

Example

{{< copyable "shell-regular" >}}

curl -X 'POST' \
  'http://127.0.0.1:8261/api/v1/sources' \
  -H 'accept: application/json' \
  -H 'Content-Type: application/json' \
  -d '{
  "source_name": "mysql-01",
  "host": "127.0.0.1",
  "port": 3306,
  "user": "root",
  "password": "123456",
  "enable_gtid": false,
  "security": {
    "ssl_ca_content": "",
    "ssl_cert_content": "",
    "ssl_key_content": "",
    "cert_allowed_cn": [
      "string"
    ]
  },
  "purge": {
    "interval": 3600,
    "expires": 0,
    "remain_space": 15
  }
}'
{
  "source_name": "mysql-01",
  "host": "127.0.0.1",
  "port": 3306,
  "user": "root",
  "password": "123456",
  "enable_gtid": false,
  "security": {
    "ssl_ca_content": "",
    "ssl_cert_content": "",
    "ssl_key_content": "",
    "cert_allowed_cn": [
      "string"
    ]
  },
  "purge": {
    "interval": 3600,
    "expires": 0,
    "remain_space": 15
  },
  "status_list": [
    {
      "source_name": "mysql-replica-01",
      "worker_name": "worker-1",
      "relay_status": {
        "master_binlog": "(mysql-bin.000001, 1979)",
        "master_binlog_gtid": "e9a1fc22-ec08-11e9-b2ac-0242ac110003:1-7849",
        "relay_dir": "./sub_dir",
        "relay_binlog_gtid": "e9a1fc22-ec08-11e9-b2ac-0242ac110003:1-7849",
        "relay_catch_up_master": true,
        "stage": "Running"
      },
      "error_msg": "string"
    }
  ]
}

Get the data source list

This API is a synchronous interface. If the request is successful, the data source list is returned.

Request URI

GET /api/v1/sources

Example

{{< copyable "shell-regular" >}}

curl -X 'GET' \
  'http://127.0.0.1:8261/api/v1/sources?with_status=true' \
  -H 'accept: application/json'
{
  "data": [
    {
      "enable_gtid": false,
      "host": "127.0.0.1",
      "password": "******",
      "port": 3306,
      "purge": {
        "expires": 0,
        "interval": 3600,
        "remain_space": 15
      },
      "security": null,
      "source_name": "mysql-01",
      "user": "root"
    },
    {
      "enable_gtid": false,
      "host": "127.0.0.1",
      "password": "******",
      "port": 3307,
      "purge": {
        "expires": 0,
        "interval": 3600,
        "remain_space": 15
      },
      "security": null,
      "source_name": "mysql-02",
      "user": "root"
    }
  ],
  "total": 2
}

Delete the data source

This API is a synchronous interface. If the request is successful, the status code of the returned body is 204.

Request URI

DELETE /api/v1/sources/{source-name}

Example

{{< copyable "shell-regular" >}}

curl -X 'DELETE' \
  'http://127.0.0.1:8261/api/v1/sources/mysql-01?force=true' \
  -H 'accept: application/json'

Get the information of a data source

This API is a synchronous interface. If the request is successful, the information of the corresponding node is returned.

Request URI

GET /api/v1/sources/{source-name}/status

Example

{{< copyable "shell-regular" >}}

curl -X 'GET' \
  'http://127.0.0.1:8261/api/v1/sources/mysql-replica-01/status' \
  -H 'accept: application/json'
{
  "total": 1,
  "data": [
    {
      "source_name": "mysql-replica-01",
      "worker_name": "worker-1",
      "relay_status": {
        "master_binlog": "(mysql-bin.000001, 1979)",
        "master_binlog_gtid": "e9a1fc22-ec08-11e9-b2ac-0242ac110003:1-7849",
        "relay_dir": "./sub_dir",
        "relay_binlog_gtid": "e9a1fc22-ec08-11e9-b2ac-0242ac110003:1-7849",
        "relay_catch_up_master": true,
        "stage": "Running"
      },
      "error_msg": "string"
    }
  ]
}

Start the relay-log feature for data sources

This API is an asynchronous interface. If the request is successful, the status code of the returned body is 200. To learn about its latest status, You can get the information of a data source.

Request URI

PATCH /api/v1/sources/{source-name}/start-relay

Example

{{< copyable "shell-regular" >}}

curl -X 'PATCH' \
  'http://127.0.0.1:8261/api/v1/sources/mysql-01/start-relay' \
  -H 'accept: */*' \
  -H 'Content-Type: application/json' \
  -d '{
  "worker_name_list": [
    "worker-1"
  ],
  "relay_binlog_name": "mysql-bin.000002",
  "relay_binlog_gtid": "e9a1fc22-ec08-11e9-b2ac-0242ac110003:1-7849",
  "relay_dir": "./relay_log"
}'

Stop the relay-log feature for data sources

This API is an asynchronous interface. If the request is successful, the status code of the returned body is 200. To learn about its latest status, You can get the information of a data source.

Request URI

PATCH /api/v1/sources/{source-name}/stop-relay

Example

{{< copyable "shell-regular" >}}

curl -X 'PATCH' \
  'http://127.0.0.1:8261/api/v1/sources/mysql-01/stop-relay' \
  -H 'accept: */*' \
  -H 'Content-Type: application/json' \
  -d '{
  "worker_name_list": [
    "worker-1"
  ]
}'

Pause the relay-log feature for data sources

This API is an asynchronous interface. If the request is successful, the status code of the returned body is 200. To learn about its latest status, You can get the information of a data source.

Request URI

PATCH /api/v1/sources/{source-name}/pause-relay

Example

{{< copyable "shell-regular" >}}

curl -X 'PATCH' \
  'http://127.0.0.1:8261/api/v1/sources/mysql-01/pause-relay' \
  -H 'accept: */*'

Resume the relay-log feature for data sources

This API is an asynchronous interface. If the request is successful, the status code of the returned body is 200. To learn about its latest status, You can get the information of a data source.

Request URI

PATCH /api/v1/sources/{source-name}/resume-relay

Example

{{< copyable "shell-regular" >}}

curl -X 'PATCH' \
  'http://127.0.0.1:8261/api/v1/sources/mysql-01/resume-relay' \
  -H 'accept: */*'

Change the bindings between the data source and DM-workers

This API is an asynchronous interface. If the request is successful, the status code of the returned body is 200. To learn about its latest status, You can get the information of a DM-worker node.

Request URI

PATCH /api/v1/sources/{source-name}/transfer

Example

{{< copyable "shell-regular" >}}

curl -X 'PATCH' \
  'http://127.0.0.1:8261/api/v1/sources/mysql-01/transfer' \
  -H 'accept: */*' \
  -H 'Content-Type: application/json' \
  -d '{
  "worker_name": "worker-1"
}'

Get the list of schema names of a data source

This API is a synchronous interface. If the request is successful, the corresponding list is returned.

Request URI

GET /api/v1/sources/{source-name}/schemas

Example

{{< copyable "shell-regular" >}}

curl -X 'GET' \
  'http://127.0.0.1:8261/api/v1/sources/source-1/schemas' \
  -H 'accept: application/json'
[
  "db1"
]

Get the list of table names of a specified schema in a data source

This API is a synchronous interface. If the request is successful, the corresponding list is returned.

Request URI

GET /api/v1/sources/{source-name}/schemas/{schema-name}

Example

{{< copyable "shell-regular" >}}

curl -X 'GET' \
  'http://127.0.0.1:8261/api/v1/sources/source-1/schemas/db1' \
  -H 'accept: application/json'
[
  "table1"
]

Create a replication task

This API is an asynchronous interface. If the request is successful, the status code of the returned body is 200. To learn about its latest status, You can get the information of a replication task.

Request URI

POST /api/v1/tasks

Example

{{< copyable "shell-regular" >}}

curl -X 'POST' \
  'http://127.0.0.1:8261/api/v1/tasks' \
  -H 'accept: application/json' \
  -H 'Content-Type: application/json' \
  -d '{
  "remove_meta": false,
  "task": {
    "name": "task-1",
    "task_mode": "all",
    "shard_mode": "pessimistic",
    "meta_schema": "dm-meta",
    "enhance_online_schema_change": true,
    "on_duplicate": "overwrite",
    "target_config": {
      "host": "127.0.0.1",
      "port": 3306,
      "user": "root",
      "password": "123456",
      "security": {
        "ssl_ca_content": "",
        "ssl_cert_content": "",
        "ssl_key_content": "",
        "cert_allowed_cn": [
          "string"
        ]
      }
    },
    "binlog_filter_rule": {
      "rule-1": {
        "ignore_event": [
          "all dml"
        ],
        "ignore_sql": [
          "^Drop"
        ]
      },
      "rule-2": {
        "ignore_event": [
          "all dml"
        ],
        "ignore_sql": [
          "^Drop"
        ]
      },
      "rule-3": {
        "ignore_event": [
          "all dml"
        ],
        "ignore_sql": [
          "^Drop"
        ]
      }
    },
    "table_migrate_rule": [
      {
        "source": {
          "source_name": "source-name",
          "schema": "db-*",
          "table": "tb-*"
        },
        "target": {
          "schema": "db1",
          "table": "tb1"
        },
        "binlog_filter_rule": [
          "rule-1",
          "rule-2",
          "rule-3",
        ]
      }
    ],
    "source_config": {
      "full_migrate_conf": {
        "export_threads": 4,
        "import_threads": 16,
        "data_dir": "./exported_data",
        "consistency": "auto"
      },
      "incr_migrate_conf": {
        "repl_threads": 16,
        "repl_batch": 100
      },
      "source_conf": [
        {
          "source_name": "mysql-replica-01",
          "binlog_name": "binlog.000001",
          "binlog_pos": 4,
          "binlog_gtid": "03fc0263-28c7-11e7-a653-6c0b84d59f30:1-7041423,05474d3c-28c7-11e7-8352-203db246dd3d:1-170"
        }
      ]
    }
  },
  "source_name_list": [
    "source-1"
  ]
}'
{
  "name": "task-1",
  "task_mode": "all",
  "shard_mode": "pessimistic",
  "meta_schema": "dm-meta",
  "enhance_online_schema_change": true,
  "on_duplicate": "overwrite",
  "target_config": {
    "host": "127.0.0.1",
    "port": 3306,
    "user": "root",
    "password": "123456",
    "security": {
      "ssl_ca_content": "",
      "ssl_cert_content": "",
      "ssl_key_content": "",
      "cert_allowed_cn": [
        "string"
      ]
    }
  },
  "binlog_filter_rule": {
    "rule-1": {
      "ignore_event": [
        "all dml"
      ],
      "ignore_sql": [
        "^Drop"
      ]
    },
    "rule-2": {
      "ignore_event": [
        "all dml"
      ],
      "ignore_sql": [
        "^Drop"
      ]
    },
    "rule-3": {
      "ignore_event": [
        "all dml"
      ],
      "ignore_sql": [
        "^Drop"
      ]
    }
  },
  "table_migrate_rule": [
    {
      "source": {
        "source_name": "source-name",
        "schema": "db-*",
        "table": "tb-*"
      },
      "target": {
        "schema": "db1",
        "table": "tb1"
      },
      "binlog_filter_rule": [
        "rule-1",
        "rule-2",
        "rule-3",
      ]
    }
  ],
  "source_config": {
    "full_migrate_conf": {
      "export_threads": 4,
      "import_threads": 16,
      "data_dir": "./exported_data",
      "consistency": "auto"
    },
    "incr_migrate_conf": {
      "repl_threads": 16,
      "repl_batch": 100
    },
    "source_conf": [
      {
        "source_name": "mysql-replica-01",
        "binlog_name": "binlog.000001",
        "binlog_pos": 4,
        "binlog_gtid": "03fc0263-28c7-11e7-a653-6c0b84d59f30:1-7041423,05474d3c-28c7-11e7-8352-203db246dd3d:1-170"
      }
    ]
  }
}

Get the replication task list

This API is a synchronous interface. If the request is successful, the information of the corresponding replication task is returned.

Request URI

GET /api/v1/tasks

Example

{{< copyable "shell-regular" >}}

curl -X 'GET' \
  'http://127.0.0.1:8261/api/v1/tasks' \
  -H 'accept: application/json'
{
  "total": 2,
  "data": [
    {
      "name": "task-1",
      "task_mode": "all",
      "shard_mode": "pessimistic",
      "meta_schema": "dm-meta",
      "enhance_online_schema_change": true,
      "on_duplicate": "overwrite",
      "target_config": {
        "host": "127.0.0.1",
        "port": 3306,
        "user": "root",
        "password": "123456",
        "security": {
          "ssl_ca_content": "",
          "ssl_cert_content": "",
          "ssl_key_content": "",
          "cert_allowed_cn": [
            "string"
          ]
        }
      },
      "binlog_filter_rule": {
        "rule-1": {
          "ignore_event": [
            "all dml"
          ],
          "ignore_sql": [
            "^Drop"
          ]
        },
        "rule-2": {
          "ignore_event": [
            "all dml"
          ],
          "ignore_sql": [
            "^Drop"
          ]
        },
        "rule-3": {
          "ignore_event": [
            "all dml"
          ],
          "ignore_sql": [
            "^Drop"
          ]
        }
      },
      "table_migrate_rule": [
        {
          "source": {
            "source_name": "source-name",
            "schema": "db-*",
            "table": "tb-*"
          },
          "target": {
            "schema": "db1",
            "table": "tb1"
          },
          "binlog_filter_rule": [
            "rule-1",
            "rule-2",
            "rule-3",
          ]
        }
      ],
      "source_config": {
        "full_migrate_conf": {
          "export_threads": 4,
          "import_threads": 16,
          "data_dir": "./exported_data",
          "consistency": "auto"
        },
        "incr_migrate_conf": {
          "repl_threads": 16,
          "repl_batch": 100
        },
        "source_conf": [
          {
            "source_name": "mysql-replica-01",
            "binlog_name": "binlog.000001",
            "binlog_pos": 4,
            "binlog_gtid": "03fc0263-28c7-11e7-a653-6c0b84d59f30:1-7041423,05474d3c-28c7-11e7-8352-203db246dd3d:1-170"
          }
        ]
      }
    }
  ]
}

Stop a replication task

This API is an asynchronous interface. If the request is successful, the status code of the returned body is 204. To learn about its latest status, You can get the information of a replication task.

Request URI

DELETE /api/v1/tasks/{task-name}

Example

{{< copyable "shell-regular" >}}

curl -X 'DELETE' \
  'http://127.0.0.1:8261/api/v1/tasks/task-1' \
  -H 'accept: */*'

Get the information of a replication task

This API is a synchronous interface. If the request is successful, the information of the corresponding node is returned.

Request URI

GET /api/v1/tasks/task-1/status

Example

{{< copyable "shell-regular" >}}

curl -X 'GET' \
  'http://127.0.0.1:8261/api/v1/tasks/task-1/status?stage=running' \
  -H 'accept: application/json'
{
  "total": 1,
  "data": [
    {
      "name": "string",
      "source_name": "string",
      "worker_name": "string",
      "stage": "runing",
      "unit": "sync",
      "unresolved_ddl_lock_id": "string",
      "load_status": {
        "finished_bytes": 0,
        "total_bytes": 0,
        "progress": "string",
        "meta_binlog": "string",
        "meta_binlog_gtid": "string"
      },
      "sync_status": {
        "total_events": 0,
        "total_tps": 0,
        "recent_tps": 0,
        "master_binlog": "string",
        "master_binlog_gtid": "string",
        "syncer_binlog": "string",
        "syncer_binlog_gtid": "string",
        "blocking_ddls": [
          "string"
        ],
        "unresolved_groups": [
          {
            "target": "string",
            "ddl_list": [
              "string"
            ],
            "first_location": "string",
            "synced": [
              "string"
            ],
            "unsynced": [
              "string"
            ]
          }
        ],
        "synced": true,
        "binlog_type": "string",
        "seconds_behind_master": 0
      }
    }
  ]
}

Pause a replication task

This API is an asynchronous interface. If the request is successful, the status code of the returned body is 200. To learn about its latest status, You can get the information of a replication task.

Request URI

PATCH /api/v1/tasks/task-1/pause

Example

{{< copyable "shell-regular" >}}

curl -X 'PATCH' \
  'http://127.0.0.1:8261/api/v1/tasks/task-1/pause' \
  -H 'accept: */*' \
  -H 'Content-Type: application/json' \
  -d '[
  "source-1"
]'

Resume a replication task

This API is an asynchronous interface. If the request is successful, the status code of the returned body is 200. To learn about its latest status, You can get the information of a replication task.

Request URI

PATCH /api/v1/tasks/task-1/resume

Example

{{< copyable "shell-regular" >}}

curl -X 'PATCH' \
  'http://127.0.0.1:8261/api/v1/tasks/task-1/resume' \
  -H 'accept: */*' \
  -H 'Content-Type: application/json' \
  -d '[
  "source-1"
]'

Get the list of schema names of the data source that is associated with a replication task

This API is a synchronous interface. If the request is successful, the corresponding list is returned.

Request URI

GET /api/v1/tasks/{task-name}/sources/{source-name}/schemas

Example

{{< copyable "shell-regular" >}}

curl -X 'GET' \
  'http://127.0.0.1:8261/api/v1/tasks/task-1/sources/source-1/schemas' \
  -H 'accept: application/json'
[
  "db1"
]

Get the list of table names of a specified schema in the data source that is associated with a replication task

This API is a synchronous interface. If the request is successful, the corresponding list is returned.

Request URI

GET /api/v1/tasks/{task-name}/sources/{source-name}/schemas/{schema-name}

Example

{{< copyable "shell-regular" >}}

curl -X 'GET' \
  'http://127.0.0.1:8261/api/v1/tasks/task-1/sources/source-1/schemas/db1' \
  -H 'accept: application/json'
[
  "table1"
]

Get the CREATE statement for schemas of the data source that is associated with a replication task

This API is a synchronous interface. If the request is successful, the corresponding CREATE statement is returned.

Request URI

GET /api/v1/tasks/{task-name}/sources/{source-name}/schemas/{schema-name}/{table-name}

Example

{{< copyable "shell-regular" >}}

curl -X 'GET' \
  'http://127.0.0.1:8261/api/v1/tasks/task-1/sources/source-1/schemas/db1/table1' \
  -H 'accept: application/json'
{
  "schema_name": "db1",
  "table_name": "table1",
  "schema_create_sql": "CREATE TABLE `t1` (`id` int(11) NOT NULL AUTO_INCREMENT,PRIMARY KEY (`id`) /*T![clustered_index] CLUSTERED */) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin"
}

Update the CREATE statement for schemas of the data source that is associated with a replication task

This API is a synchronous interface. If the request is successful, the status code of the returned body is 200.

Request URI

PATCH /api/v1/tasks/{task-name}/sources/{source-name}/schemas/{schema-name}/{table-name}

Example

{{< copyable "shell-regular" >}}

curl -X 'PUT' \
  'http://127.0.0.1:8261/api/v1/tasks/task-1/sources/task-1/schemas/db1/table1' \
  -H 'accept: */*' \
  -H 'Content-Type: application/json' \
  -d '{
  "sql_content": "CREATE TABLE `t1` ( `c1` int(11) DEFAULT NULL, `c2` int(11) DEFAULT NULL, `c3` int(11) DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;",
  "flush": true,
  "sync": true
}'

Delete a schema of the data source that is associated with a replication task

This API is a synchronous interface. If the request is successful, the status code of the returned body is 200.

Request URI

DELETE /api/v1/tasks/{task-name}/sources/{source-name}/schemas/{schema-name}/{table-name}

Example

{{< copyable "shell-regular" >}}

curl -X 'DELETE' \
  'http://127.0.0.1:8261/api/v1/tasks/task-1/sources/source-1/schemas/db1/table1' \
  -H 'accept: */*'