验证集群运行状态

在部署完一套 TiDB 集群后,需要检查集群是否正常运行。本文介绍如何通过 TiUP 命令、TiDB Dashboard 和 Grafana 检查集群状态,以及如何登录 TiDB 数据库执行简单的 SQL 操作。

检查集群状态的命令是 ,例如:

预期结果输出:各节点 Status 状态信息为 Up 说明集群状态正常。

本节介绍如何通过 和 Grafana 检查集群状态。

  1. 通过 {pd-ip}:{pd-port}/dashboard 登录 TiDB Dashboard,登录用户和口令为 TiDB 数据库 root 用户和口令。如果你修改过数据库的 root 密码,则以修改后的密码为准,默认密码为空。

  2. 主页面显示 TiDB 集群中节点信息

    TiDB-Dashboard-status

  • 通过 {Grafana-ip}:3000 登录 Grafana 监控,默认用户名及密码为 admin/admin

执行如下命令登录数据库:

  1. mysql -u root -h 10.0.1.4 -P 4000

输出下列信息表示登录成功:

  1. Welcome to the MySQL monitor. Commands end with ; or \g.
  2. Your MySQL connection id is 3
  3. Server version: 5.7.25-TiDB-v4.0.0 TiDB Server (Apache License 2.0) Community Edition, MySQL 5.7 compatible
  4. Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
  5. Oracle is a registered trademark of Oracle Corporation and/or its
  6. affiliates. Other names may be trademarks of their respective
  7. owners.
  8. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
  • 创建 PingCAP database

    1. create database pingcap;
    1. use pingcap;

    预期输出

    1. Database changed
    1. CREATE TABLE `tab_tidb` (
    2. `id` int(11) NOT NULL AUTO_INCREMENT,
    3. `name` varchar(20) NOT NULL DEFAULT '',
    4. `age` int(11) NOT NULL DEFAULT 0,
    5. `version` varchar(20) NOT NULL DEFAULT '',
    6. PRIMARY KEY (`id`),

    预期输出

    1. Query OK, 0 rows affected (0.11 sec)
  • 插入数据

    1. insert into `tab_tidb` values (1,'TiDB',5,'TiDB-v4.0.0');

    预期输出

  • 查看 tab_tidb 结果

    1. select * from tab_tidb;

    预期输出

    1. +----+------+-----+-------------+
    2. | id | name | age | version |
    3. +----+------+-----+-------------+
    4. | 1 | TiDB | 5 | TiDB-v4.0.0 |
    5. +----+------+-----+-------------+
    6. 1 row in set (0.00 sec)
  • 查看 TiKV store 状态、store_id、存储情况以及启动时间

    1. select STORE_ID,ADDRESS,STORE_STATE,STORE_STATE_NAME,CAPACITY,AVAILABLE,UPTIME from INFORMATION_SCHEMA.TIKV_STORE_STATUS;

    预期输出

    1. +----------+--------------------+-------------+------------------+----------+-----------+--------------------+
    2. | STORE_ID | ADDRESS | STORE_STATE | STORE_STATE_NAME | CAPACITY | AVAILABLE | UPTIME |
    3. +----------+--------------------+-------------+------------------+----------+-----------+--------------------+
    4. | 1 | 10.0.1.1:20160 | 0 | Up | 49.98GiB | 46.3GiB | 5h21m52.474864026s |
    5. | 4 | 10.0.1.2:20160 | 0 | Up | 49.98GiB | 46.32GiB | 5h21m52.522669177s |
    6. | 5 | 10.0.1.3:20160 | 0 | Up | 49.98GiB | 45.44GiB | 5h21m52.713660541s |
    7. +----------+--------------------+-------------+------------------+----------+-----------+--------------------+
    8. 3 rows in set (0.00 sec)
  • 退出

    预期输出