| 数据库角色 | IP | 主机名 |
|---|---|---|
| 主数据库 | 192.168.25.132 | node02-Linux.example.com |
| 从数据库 | 192.168.25.133 | node03-Linux.example.com |
主数据库192.168.25.132已经安装了agent
从数据库安装agent
我要评论[root@node02-linux ~]# yum -y install wget vim gcc gcc-c++ pcre-devel
[root@node03-Linux ~]# wget https://cdn.zabbix.com/zabbix/sources/stable/5.0/zabbix-5.0.2.tar.gz
[root@node03-Linux ~]# tar xf zabbix-5.0.2.tar.gz
[root@node03-Linux ~]# cd zabbix-5.0.2
[root@node03-Linux zabbix-5.0.2]# ./configure --enable-agent
[root@node03-Linux zabbix-5.0.2]# make install
[root@node03-Linux etc]# useradd -r -M -s /sbin/nologin zabbix
[root@node03-Linux zabbix-5.0.2]# cd /usr/local/etc/
[root@node03-Linux etc]# vim zabbix_agentd.conf
...
Server=192.168.25.131
...
ServerActive=192.168.25.131
...
Hostname=MySQL_Slave1
[root@node03-Linux ~]# zabbix_agentd
[root@node03-Linux ~]# systemctl stop firewalld
[root@node03-Linux ~]# systemctl disable firewalld
[root@node03-Linux ~]# ss -antl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:10050 *:*
LISTEN 0 50 *:3306 *:*
LISTEN 0 128 *:22 *:*
LISTEN 0 100 127.0.0.1:25 *:*
LISTEN 0 128 :::22 :::*
LISTEN 0 100 ::1:25 :::*
安装配置主数据库
[root@node02-linux ~]# yum -y install mariadb*
[root@node02-linux ~]# systemctl enable --now mariadb
#在主数据库里创建一个同步账号授权给从数据库使用
[root@node02-linux ~]# mysql
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 2
Server version: 5.5.65-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)]> create user 'repl'@'192.168.25.133' identified by 'repl123';
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> grant replication slave on *.* to 'repl'@'192.168.25.133';
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> flush privileges;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> exit
Bye
#配置主数据库
[root@node02-linux ~]# vim /etc/my.cnf
log-bin = mysql_bin
server-id = 10
#重启mysql服务
[root@node02-linux ~]# systemctl restart mariadb
#查看主库的状态
[root@node02-linux ~]# mysql
...
MariaDB [(none)]> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql_bin.000001 | 245 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
安装配置从数据库
[root@node03-Linux ~]# yum -y install mariadb*
[root@node03-Linux ~]# vim /etc/my.cnf
server-id = 20
relay-log = myrelay_log
[root@node03-Linux ~]# systemctl enable --now mariadb
[root@node03-Linux ~]# mysql
...
MariaDB [(none)]> change master to \
-> master_host='192.168.25.132',
-> master_user='repl',
-> master_password='repl123',
-> master_log_file='mysql_bin.000001',
-> master_log_pos=245;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> start slave;
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.25.132
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql_bin.000001
Read_Master_Log_Pos: 245
Relay_Log_File: myrelay_log.000002
Relay_Log_Pos: 529
Relay_Master_Log_File: mysql_bin.000001
Slave_IO_Running: Yes
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: 245
Relay_Log_Space: 819
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
1 row in set (0.00 sec)
[root@node03-Linux ~]# mkdir -p /scripts/zabbix
[root@node03-Linux ~]# vim /scripts/zabbix/check_replication.sh
#!/bin/bash
mysql_status=$(mysql -uroot -e 'show slave status\G' 2>/dev/null|grep 'Slave.*Running'|grep -c 'Yes')
if [ $mysql_status -ne 2 ];then
echo '1'
else
echo '0'
fi
[root@node03-Linux ~]# vim /usr/local/etc/zabbix_agentd.conf
...
UnsafeUserParameters=1
...
UserParameter=check_replication,/bin/bash /scripts/zabbix/check_replication.sh
...
[root@node03-Linux ~]# pkill zabbix
[root@node03-Linux ~]# zabbix_agentd
[root@node03-Linux ~]# systemctl stop mariadb
通过命令“show slave status\G;”获取Seconds_Behind_Master这一项的值，可以作为主从延迟的值
[root@node03-Linux ~]# vim /scripts/zabbix/delay_replication.sh
#!/bin/bash
delay_value=$(mysql -uroot -e 'show slave status\G' 2>/dev/null|grep 'Seconds_Behind_Master'|awk -F'[: ]+' '{print $3}')
echo $delay_value
[root@node03-Linux ~]# vim /usr/local/etc/zabbix_agentd.conf
...
UserParameter=delay_replication,/bin/bash /scripts/zabbix/delay_replication.sh
...
[root@node03-Linux ~]# pkill zabbix
[root@node03-Linux ~]# zabbix_agentd
为了直观的看到效果，我们把没有延迟作为告警
本文地址：https://blog.csdn.net/qq996616/article/details/107502328
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