Question

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
    }