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Show Meta Info Action

Show Meta Info Action

Request​

GET /api/show_meta_info

Description​

Used to display some metadata information

Path parameters​

ζ— 

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
    }