Show Meta Info Action

Show Meta Info Action

Request

GET /api/show_meta_info

Description

Used to display some metadata information

Path parameters

无

Query parameters

• action

  Specify the type of metadata information to be obtained. Currently supports the following:

  • SHOW_DB_SIZE

    Get the data size of the specified database, in bytes.

  • SHOW_HA

    Obtain the playback status of FE metadata logs and the status of electable groups.

Request body

None

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. View the data size of each database in the cluster

   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. View the FE election group situation

   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
   }