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

1. Response:
2. {
3. "msg": "success",
4. "code": 0,
5. "data": {
6. "default_cluster:information_schema": 0,
7. "default_cluster:db1": 381
8. },
9. "count": 0
10. } ```
11. 查看FE选举组情况

``` 1. GET /api/show_meta_info?action=show_ha

1. Response:
2. {
3. "msg": "success",
4. "code": 0,
5. "data": {
6. "can_read": "true",
7. "role": "MASTER",
8. "is_ready": "true",
9. "last_checkpoint_version": "1492",
10. "last_checkpoint_time": "1596465109000",
11. "current_journal_id": "1595",
12. "electable_nodes": "",
13. "observer_nodes": "",
14. "master": "10.81.85.89"
15. },
16. "count": 0
17. } ```