自定义监控(mysql主从和mysql延迟)
2022/7/13 2:21:37
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自定义监控(mysql主从和mysql延迟)
准备工作
#在server主机上搭建zabbix服务
#在localhost主机上搭建zabbix客户端
#在master主机和localhost主机上安装mysql
//关闭主从端的防火墙
[root@localhost ~]# systemctl status firewalld.service
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; v>
Active: inactive (dead)
Docs: man:firewalld(1)
[root@master ~]# systemctl status firewalld.service
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; v>
Active: inactive (dead)
Docs: man:firewalld(1)
搭建mysql主从
主库
//在主库上创建用户repl授权给从库使用 mysql> grant replication slave on *.* to repl@'192.168.78.140' identified by 'repl123'; Query OK, 0 rows affected, 1 warning (0.01 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec)
配置主库文件
[root@master ~]# vim /etc/my.cnf [root@master ~]# cat /etc/my.cnf [mysqld] basedir = /usr/local/mysql datadir = /opt/data socket = /tmp/mysql.sock port = 3306 pid-file = /opt/data/mysql.pid user = mysql skip-name-resolve server-id=10 log-bin=mysql_bin [root@master ~]# systemctl restart mysqld.service [root@master ~]# mysql -uroot -pruntime123! mysql: [Warning] Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.7.37-log MySQL Community Server (GPL) Copyright (c) 2000, 2022, Oracle and/or its affiliates. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. mysql> show master status; +------------------+----------+--------------+------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+------------------+-------------------+ | mysql_bin.000001 | 154 | | | | +------------------+----------+--------------+------------------+-------------------+ 1 row in set (0.00 sec)
配置从库
[root@localhost ~]# vim /etc/my.cnf [root@localhost ~]# cat /etc/my.cnf [mysqld] basedir = /usr/local/mysql datadir = /opt/data socket = /tmp/mysql.sock port = 3306 pid-file = /opt/data/mysql.pid user = mysql skip-name-resolve server-id=20 relay-log=mysql-relay-bin [root@localhost ~]# systemctl restart mysqld.service
//连接数据库主从配置
mysql> change master to
-> master_host='192.168.78.142',
-> master_user='repl',
-> master_password='repl123',
-> master_log_file='mysql_bin.000001',
-> master_log_pos=154;
Query OK, 0 rows affected, 2 warnings (0.02 sec)
mysql> start slave； //启动
mysql> show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.78.142
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql_bin.000001
Read_Master_Log_Pos: 154
Relay_Log_File: mysql-relay-bin.000003
Relay_Log_Pos: 0
Relay_Master_Log_File: mysql_bin.000001
Slave_IO_Running: Yes //两个yse表示开启成功
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 154
Relay_Log_Space: 693
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 10
Master_UUID: 32748ca6-00f6-11ed-a5ea-000c29972037
Master_Info_File: /opt/data/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
1 row in set (0.00 sec)
测试
//主库添加123 [root@master ~]# mysql -uroot -p'runtime123!' -e 'create database 123;' mysql: [Warning] Using a password on the command line interface can be insecure. [root@master ~]# mysql -uroot -p'runtime123!' -e 'show databases;' mysql: [Warning] Using a password on the command line interface can be insecure. +--------------------+ | Database | +--------------------+ | information_schema | | 123 | | mysql | | performance_schema | | sys | | test | +--------------------+ //从库查看 [root@localhost ~]# mysql -uroot -p'runtime123!' -e 'show databases;' mysql: [Warning] Using a password on the command line interface can be insecure. +--------------------+ | Database | +--------------------+ | information_schema | | 123 | | mysql | | performance_schema | | sys | | test | +--------------------+
编写脚本
[root@localhost scropts]# cat mysqlms.sh
#!/bin/bash
count=$( mysql -uroot -pruntime123! -e "show slave status\G" 2>/dev/null | grep -v grep | grep -c 'Yes')
if [ $count -ne 2 ];then
echo '1'
else
echo '0'
fi
[root@localhost scropts]# chmod +x mysqlms.sh //赋予执行权限
[root@localhost scropts]# ll
总用量 12
-rwxr-xr-x. 1 root root 1554 7月 9 11:15 log.py
-rwxr-xr-x. 1 root root 176 7月 11 13:40 mysqlms.sh
[root@localhost scropts]# bash mysqlms.sh //结果为0，脚本没有问题
0
配置文件zabbix_agentd.conf
[root@localhost ~]# vim zabbix_agentd.conf
UserParameter=check_mysqlms,/bin/bash /scropts/mysqlms.sh //添加自定义监控
[root@localhost ~]# pkill zabbix_agentd
[root@localhost ~]# zabbix_agentd
配置zabbix网页
添加监控项（右上角）
添加触发器（右上角）
测试
//打开防火墙
[root@master ~]# systemctl start firewalld.service
[root@master ~]# systemctl status firewalld.service
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
Active: active (running) since Mon 2022-07-11 06:10:40 EDT; 32s ago
Docs: man:firewalld(1)
Main PID: 258109 (firewalld)
Tasks: 2 (limit: 11160)
Memory: 28.8M
CGroup: /system.slice/firewalld.service
└─258109 /usr/libexec/platform-python -s /usr/sbin/firewalld --nofork --nopid
查看zabbix
自定义监控mysql主从延迟
编写脚本
[root@localhost scropts]# cat mysql_delay.sh
#!/bin/bash
delay=$( mysql -uroot -pruntime123! -e "show slave status\G" 2>/dev/null | grep 'Seconds_Behind_Master'| awk '{print $2}')
echo $delay
//给执行权限
[root@localhost scropts]# chmod +x mysql_delay.sh
[root@localhost scropts]# ll
总用量 16
-rwxr-xr-x. 1 root root 1854 7月 9 16:15 log.py
-rwxr-xr-x. 1 root root 151 7月 11 18:30 mysql_delay.sh
-rwxr-xr-x. 1 root root 178 7月 11 17:20 mysqlms.sh
//修改文件
[root@localhost etc]# cd /usr/local/etc/
[root@localhost etc]# cat zabbix_agentd.conf
//添加
UserParameter=mysql_delay,/bin/bash /scropts/mysql_delay.sh
[root@localhost etc]# pkill zabbix_agentd
[root@localhost etc]# zabbix_agentd
//测试
[root@localhost scropts]# bash mysql_delay.sh
0
[root@zabbix.server ~]# zabbix_get -s 192.168.78.141 -k mysql_delay //服务端测试
0
配置zabbix网页
添加监控项（右上角）
1
添加触发器（右上角）
1
回到首页查看告警
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