mysql主从的搭建+shell实现检测并邮件报警

做mysql主从复制
安装mysql

[root@localhost ~]# yum -y install mariadb mariadb-server

修改配置文件开启二进制日志（添加在mysqld模块内）

[root@localhost ~]# vim /etc/my.cnf
server-id=1
log-bin=mysql-master-bin

关闭防火墙、sulinux。

[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# setenforce 0

重启mysql

[root@localhost ~]# systemctl restart mariadb

设置mysql密码

[root@localhost ~]# mysqladmin -uroot password 123456

登录数据库

[root@localhost ~]# mysql -uroot -p123456

MariaDB [(none)]> grant all on *.* to tom@'%' identified by 'tom';
MariaDB [(none)]> show master status \G;
*************************** 1. row ***************************
            File: mysql-master-bin.000003
        Position: 505

（从）
安装

[root@localhost ~]# yum -y install mariadb mariadb-server

修改配置文件（mysqld模块中添加）

[root@localhost ~]# vim /etc/my.cnf
server-id=2
log-bin=mysql-server-bin
relay-log=relay-server-bin

关闭防火墙、sulinux

[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# setenforce 0

重启mysql

[root@localhost ~]# systemctl restart mariadb

设置mysql密码

[root@localhost ~]# mysqladmin -uroot password 123456

登录数据库

[root@localhost ~]# mysql -uroot -p123456
MariaDB [(none)]> change master to master_host='192.168.33.136',
    -> master_user='tom',
    -> master_password='tom',
    -> master_log_file='mysql-master-bin.000003',
    -> master_log_pos=505;
    Query OK, 0 rows affected (0.03 sec)
    
    MariaDB [(none)]> start slave;
    Query OK, 0 rows affected (0.02 sec)

	MariaDB [(none)]> show slave status \G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.33.136
                  Master_User: tom
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-master-bin.000003
          Read_Master_Log_Pos: 505
               Relay_Log_File: relay-server-bin.000002
                Relay_Log_Pos: 536
        Relay_Master_Log_File: mysql-master-bin.000003
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

编写shell脚本实现邮件报警
安装maile

[root@localhost ~]# yum -y install mailx

编辑maile配置文件（添加）

[root@localhost ~]# vim /etc/mail.rc
#########################
set from=[email protected]
set smtp=smtp.qq.com
set smtp-auth-user=[email protected]
set smtp-auth-password=ncmekcuebqdcbdic
set smtp-auth=login
########################

编写脚本

[root@localhost ~]# vim /shell/check_mysql.sh

#!/bin/bash
num=`mysql -e "show slave status \G" | grep Yes |awk -F ':' '{print $2}' | wc -l`
if [ $num -eq 2 ];then
        echo "mysql 主从正常！"
else
        echo "mysql 主从异常，请及时修正！" | mail -s "chenk mail" [email protected]
fi

执行脚本测试

[root@localhost ~]# sh /shell/check_mysql.sh 
mysql 主从正常！

关闭slave并再次测试

MariaDB [(none)]> stop slave;
Query OK, 0 rows affected (0.00 sec)

[root@localhost ~]# sh /shell/check_mysql.sh