自定义监控MySQL主从状态
zabbix自定义监控Mysql主从状态和延迟
目录监控Mysql主从状态
主从同步
监控mysql主从状态监控的是从库，所以只用在从库是安装并启动zabbix_aength
以下启动安装可参考
这里实验使用的yum安装的mariadb，实战中请2进制安装mysql
mysql主从同步可参考
主库配置
#给主库改一个名字
[root@localhost ~]# hostnamectl set-hostname nie
[root@localhost ~]# bash
#这里实验使用yum安装mariadb，并设置开机自启立即启动
[root@nie ~]# dnf -y install mariadb*
[root@nie ~]# systemctl enable --now mariadb
Created symlink /etc/systemd/system/mysql.service → /usr/lib/systemd/system/mariadb.service.
Created symlink /etc/systemd/system/mysqld.service → /usr/lib/systemd/system/mariadb.service.
Created symlink /etc/systemd/system/multi-user.target.wants/mariadb.service → /usr/lib/systemd/system/mariadb.service.
#更改mariadb数据库密码
[root@nie ~]# mysql
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 8
Server version: 10.3.28-MariaDB MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> set password = password('123456');
Query OK, 0 rows affected (0.000 sec)
MariaDB [(none)]> quit
Bye
[root@nie ~]# mysql -uroot -p123456
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 9
Server version: 10.3.28-MariaDB MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]>
#在主库上创建同步账号
MariaDB [(none)]> grant replication slave on *.* to 'repl'@'192.168.118.136' identified by '123456';
Query OK, 0 rows affected (0.000 sec)
MariaDB [(none)]> quit
Bye
#编写主库配置文件
[root@nie ~]# vim /etc/my.cnf.d/mariadb-server.cnf
...
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mariadb/mariadb.log
pid-file=/run/mariadb/mariadb.pid
log-bin = mysql_bin //启用binlog日志
server-id=10 //数据库服务器唯一标识符，此处需要小于从库
...
[root@nie ~]# systemctl restart mariadb
#查看主库状态
[root@nie ~]# mysql -uroot -p123456
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 9
Server version: 10.3.28-MariaDB MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> show nie status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql_bin.000001 | 328 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.000 sec)
从库配置
#从库中安装并启动zabbix_agent
[root@136 ~]# ss -antl
State Recv-Q Send-Q Local Address:Port Peer Address:Port Process
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 128 0.0.0.0:10050 0.0.0.0:*
#这里实验使用yum安装mariadb，并设置开机自启立即启动
[root@136 ~]# dnf -y install mariadb*
[root@136 ~]# systemctl enable --now mariadb
Created symlink /etc/systemd/system/mysql.service → /usr/lib/systemd/system/mariadb.service.
Created symlink /etc/systemd/system/mysqld.service → /usr/lib/systemd/system/mariadb.service.
Created symlink /etc/systemd/system/multi-user.target.wants/mariadb.service → /usr/lib/systemd/system/mariadb.service.
#更改mariadb数据库密码
[root@136 ~]# mysql
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 8
Server version: 10.3.28-MariaDB MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> set password = password('123456');
Query OK, 0 rows affected (0.000 sec)
MariaDB [(none)]> quit
Bye
[root@136 ~]# mysql -uroot -p123456
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 9
Server version: 10.3.28-MariaDB MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]>
#编写从库配置文件
[root@136 ~]# vim /etc/my.cnf.d/mariadb-server.cnf
...
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mariadb/mariadb.log
pid-file=/run/mariadb/mariadb.pid
relay-log = myrelay
server-id = 20
...
[root@136 ~]# systemctl restart mariadb
#配置主从
[root@136 ~]# mysql -uroot -p123456
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 9
Server version: 10.3.28-MariaDB MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> change nie to
-> nie_host='192.168.48.141',
-> nie_user='repl',
-> nie_password='123456',
-> nie_log_file='mysql_bin.000001',
-> nie_log_pos=328;
Query OK, 0 rows affected (0.003 sec)
MariaDB [(none)]> start slave;
Query OK, 0 rows affected (0.001 sec)
MariaDB [(none)]> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for nie to send event
nie_Host: 192.168.118.130
nie_User: repl
nie_Port: 3306
Connect_Retry: 60
nie_Log_File: mysql_bin.000001
Read_nie_Log_Pos: 328
Relay_Log_File: myrelay.000002
Relay_Log_Pos: 555
Relay_nie_Log_File: mysql_bin.000001
Slave_IO_Running: Yes //此处必须为yes
Slave_SQL_Running: Yes //此处必须为yes
Replicate_Do_DB:
...
测试验证
在主数据库中创建一个runtime数据库
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
+--------------------+
3 rows in set (0.001 sec)
MariaDB [(none)]> create database runtime;
Query OK, 1 row affected (0.000 sec)
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| runtime |
+--------------------+
4 rows in set (0.000 sec)
在从库中查看，这里也多了一个runtime数据库，验证成功。
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| runtime |
+--------------------+
4 rows in set (0.000 sec)
配置监控脚本
从库配置文件与编写脚本
#编写脚本
[root@136 ~]# vim /etc/scripts/mysql_status.sh
#!/bin/bash
yes=`mysql -uroot -p123456 -e " show slave status\G" 2> /dev/null |grep "Running:"|grep -c "Yes"`
if [ $yes == 2 ]; then
echo "0"
else
echo "1"
fi
[root@136 ~]# chmod +x /etc/scripts/mysql_status.sh
#在从库修改配置文件
[root@136 ~]# vim /usr/local/etc/zabbix_agentd.conf
...
UserParameter=check_mysql_status,/bin/bash /etc/scripts/mysql_status.sh
#重启服务生效配置
[root@136 ~]# pkill zabbix_agentd
[root@136 ~]# zabbix_agentd
服务端检查key是否可以使用
[root@zabbix ~]# zabbix_get -s 192.168.118.136 -k check_mysql_status
0
添加监控项
手动触发报警，查看报警信息
自定义监控MySQL延迟
配置监控脚本
监控延迟，我们需要关注 Seconds_Behind_Master这一项
//在被监控端，也就是从库，首先修改配置文件
[root@localhost ~]# vim /usr/local/etc/zabbix_agentd.conf
UserParameter=check_mysqlyc,/bin/bash /scripts/mysqlyc.sh
//重启服务生效配置
[root@localhost ~]# pkill zabbix_agentd
[root@localhost ~]# zabbix_agentd
//再编写脚本
[root@localhost ~]# vim /scripts/mysqlyc.sh
#!/bin/bash
yc=`mysql -uroot -p123456 -e "show slave status\G" 2> /dev/null |awk '/Seconds_Behind_Master/ {print $2}' `
echo $yc
[root@localhost ~]# chmod +x /scripts/mysqlyc.sh
//去服务端检查key是否可用
[root@zabbix ~]# zabbix_get -s 192.168.48.151 -k check_mysqlyc
0