Show Meta Info Action

Request

GET /api/show_meta_info

Description

用于显示一些元数据信息

Path parameters

无

Query parameters

  • action

    指定要获取的元数据信息类型。目前支持如下：

    • SHOW_DB_SIZE

      获取指定数据库的数据量大小，单位为字节。

    • SHOW_HA

      获取 FE 元数据日志的回放情况，以及可选举组的情况。

Request body

无

Response

  • SHOW_DB_SIZE

    1. {
    2.     "msg": "success",
    3.     "code": 0,
    4.     "data": {
    5.         "default_cluster:information_schema": 0,
    6.         "default_cluster:db1": 381
    7.     },
    8.     "count": 0
    9. }

  • SHOW_HA

    1. {
    2.     "msg": "success",
    3.     "code": 0,
    4.     "data": {
    5.         "can_read": "true",
    6.         "role": "MASTER",
    7.         "is_ready": "true",
    8.         "last_checkpoint_version": "1492",
    9.         "last_checkpoint_time": "1596465109000",
    10.         "current_journal_id": "1595",
    11.         "electable_nodes": "",
    12.         "observer_nodes": "",
    13.         "master": "10.81.85.89"
    14.     },
    15.     "count": 0
    16. }

Examples

  1. 查看集群各个数据库的数据量大小

    1. GET /api/show_meta_info?action=show_db_size
    3. Response:
    4. {
    5.     "msg": "success",
    6.     "code": 0,
    7.     "data": {
    8.         "default_cluster:information_schema": 0,
    9.         "default_cluster:db1": 381
    10.     },
    11.     "count": 0
    12. }

  2. 查看FE选举组情况

    1. GET /api/show_meta_info?action=show_ha
    3. Response:
    4. {
    5.     "msg": "success",
    6.     "code": 0,
    7.     "data": {
    8.         "can_read": "true",
    9.         "role": "MASTER",
    10.         "is_ready": "true",
    11.         "last_checkpoint_version": "1492",
    12.         "last_checkpoint_time": "1596465109000",
    13.         "current_journal_id": "1595",
    14.         "electable_nodes": "",
    15.         "observer_nodes": "",
    16.         "master": "10.81.85.89"
    17.     },
    18.     "count": 0
    19. }