Show Meta Info Action

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

  {
      "msg": "success",
      "code": 0,
      "data": {
          "default_cluster:information_schema": 0,
          "default_cluster:db1": 381
      },
      "count": 0
  }

• SHOW_HA

  {
      "msg": "success",
      "code": 0,
      "data": {
          "can_read": "true",
          "role": "MASTER",
          "is_ready": "true",
          "last_checkpoint_version": "1492",
          "last_checkpoint_time": "1596465109000",
          "current_journal_id": "1595",
          "electable_nodes": "",
          "observer_nodes": "",
          "master": "10.81.85.89"
      },
      "count": 0
  }

Examples

1. 查看集群各个数据库的数据量大小

   GET /api/show_meta_info?action=show_db_size
   
   Response:
   {
       "msg": "success",
       "code": 0,
       "data": {
           "default_cluster:information_schema": 0,
           "default_cluster:db1": 381
       },
       "count": 0
   }

2. 查看FE选举组情况

   GET /api/show_meta_info?action=show_ha
   
   Response:
   {
       "msg": "success",
       "code": 0,
       "data": {
           "can_read": "true",
           "role": "MASTER",
           "is_ready": "true",
           "last_checkpoint_version": "1492",
           "last_checkpoint_time": "1596465109000",
           "current_journal_id": "1595",
           "electable_nodes": "",
           "observer_nodes": "",
           "master": "10.81.85.89"
       },
       "count": 0
   }