Grafana +MySQL Data Source

1. grafana 、mysql安装

• 
  
• grafana 安装
  

Grafana Linux版本安装地址

mysql 安装

这里选 mariadb

• 安装

 yum -y install mariadb mariadb-server

• 启动MariaDB,设置开机自启动

systemctl start mariadb

systemctl enable mariadb

• mariadb初始化

[root@cloud01 ~]# mysql_secure_installation

NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB
      SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!

In order to log into MariaDB to secure it, we'll need the current
password for the root user.  If you've just installed MariaDB, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.

Enter current password for root (enter for none): 
OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MariaDB
root user without the proper authorisation.

Set root password? [Y/n] 
New password: 
Re-enter new password: 
Password updated successfully!
Reloading privilege tables..
 ... Success!


By default, a MariaDB installation has an anonymous user, allowing anyone
to log into MariaDB without having to have a user account created for
them.  This is intended only for testing, and to make the installation
go a bit smoother.  You should remove them before moving into a
production environment.

Remove anonymous users? [Y/n] 
 ... Success!

Normally, root should only be allowed to connect from 'localhost'.  This
ensures that someone cannot guess at the root password from the network.

Disallow root login remotely? [Y/n] 
 ... Success!

By default, MariaDB comes with a database named 'test' that anyone can
access.  This is also intended only for testing, and should be removed
before moving into a production environment.

Remove test database and access to it? [Y/n] 
 - Dropping test database...
 ... Success!
 - Removing privileges on test database...
 ... Success!

Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.

Reload privilege tables now? [Y/n] 
 ... Success!

Cleaning up...

All done!  If you've completed all of the above steps, your MariaDB
installation should now be secure.

Thanks for using MariaDB!
[root@cloud01 ~]# 

• 测试登入mariadb,创建表grafana，修改连接权限

[root@cloud01 ~]# mysql -uroot -p 
Enter password: 
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 14
Server version: 5.5.56-MariaDB MariaDB Server医用

Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> 
MariaDB [mysql]> CREATE DATABASE grafana;
Query OK, 1 row affected (0.00 sec)

MariaDB [mysql]> 
MariaDB [mysql]> select user,host from user;
+------+-----------+
| user | host      |
+------+-----------+
| root | 127.0.0.1 |
| root | ::1       |
| root | localhost |
+------+-----------+
3 rows in set (0.00 sec)

MariaDB [mysql]> update user set host = '%' where user = 'root'; 
ERROR 1062 (23000): Duplicate entry '%-root' for key 'PRIMARY'
MariaDB [mysql]> select user,host from user;
+------+-----------+
| user | host      |
+------+-----------+
| root | %         |
| root | 127.0.0.1 |
| root | ::1       |
+------+-----------+
3 rows in set (0.00 sec)

MariaDB [mysql]> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

MariaDB [mysql]> 

2.数据导入mariadb

• 前期测试直接把测试数据（excle表）导入mariadb中。
• 贴一个grafana 中使用mysql 的官方文档
  Using MySQL In Grafana

3.Grafana+MariaDB Data Source

- 添加数据源

- 配置数据源

- 创建模板

- 选grafana

- 编辑配置

- 选着添加好的数据源

- Add Query

SELECT
  UNIX_TIMESTAMP(Date_Time) as time_sec,
  Total_Current as value,
  Timer_Id as metric
FROM workinfo
WHERE $__timeFilter(Date_Time)
ORDER BY Date_Time ASC

- 指标上下限设置