Keepalived+mysql 自動切換
項目環境:
VIP 192.168.246.100
mysql1 192.168.246.162 keepalived-master
mysql2 192.168.246.163 keepalived-slave
一、mysql 主主同步(互爲主從) (不使用共享存儲,數據保存本地存儲)
二、安裝keepalived
三、keepalived主備配置文件
四、mysql狀態檢測腳本/root/bin/keepalived_check_mysql.sh
五、測試及診斷
======================================================
實施步驟:
一、mysql 主主同步 <略>
===================================================================================
mysql兩個節點均操作
[root@mysql-keepalived-master ~]# yum -y install maraidb-server mariadb
[root@mysql-keepalived-master ~]# systemctl start mariadb
[root@mysql-keepalived-master ~]# mysql
節點1創建qf1庫名,以便測試
MariaDB [(none)]> create database qf1;
MariaDB [(none)]> quit;
創建一個客戶端能夠測試連接的用戶
MariaDB [(none)]> grant all privileges on *.* to root@'%' identified by '123456';
MariaDB [(none)]> flush privileges;
[root@mysql-keepalived-slave ~]# yum -y install mariadb-server mariadb
[root@mysql-keepalived-slave ~]# systemctl start mariadb
[root@mysql-keepalived-slave ~]# mysql
節點1創建qf2庫名,以便測試
MariaDB [(none)]> create database qf2;
MariaDB [(none)]> quit;
創建一個客戶端能夠測試連接的用戶
MariaDB [(none)]> grant all privileges on *.* to root@'%' identified by '123456';
MariaDB [(none)]> flush privileges;
====================================================================================
二、安裝keepalived---兩臺機器都操作
[root@mysql-keepalived-master ~]# yum -y install keepalived
[root@mysql-keepalived-slave ~]# yum -y install keepalived
三、keepalived 主備配置文件
192.168.246.162 master配置
[root@mysql-keepalived-master ~]# mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
[root@mysql-keepalived-master ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id master
}
vrrp_script check_run {
script "/etc/keepalived/keepalived_chech_mysql.sh"
interval 5
}
vrrp_instance VI_1 {
state MASTER
interface ens33
virtual_router_id 89
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.246.18/24
}
track_script {
check_run
}
}
===========================================================================
slave 192.168.246.163 配置
[root@mysql-keepalived-slave ~]# cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
[root@mysql-keepalived-slave ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id backup
}
vrrp_script check_run {
script "/etc/keepalived/keepalived_check_mysql.sh"
interval 5
}
vrrp_instance VI_1 {
state BACKUP
nopreempt
interface ens33
virtual_router_id 89
priority 50
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.246.18/24
}
track_script {
check_run
}
}
四、mysql狀態檢測腳本/root/keepalived_check_mysql.sh(兩臺MySQL同樣的腳本)
版本一:簡單使用:
[root@mysql-keepalived-master ~]# vim /etc/keepalived/keepalived_chech_mysql.sh
#!/bin/bash
/usr/bin/mysql -uroot -p'QianFeng@2019!' -e "show status" &>/dev/null
if [ $? -ne 0 ] ;then
# service keepalived stop
systemctl stop keepalived
fi
[root@mysql-keepalived-master ~]# chmod +x /etc/keepalived/keepalived_chech_mysql.sh
==========================================================================
兩邊均啓動keepalived
方式一:
[root@mysql-keepalived-master ~]# systemctl restart keepalived
[root@mysql-keepalived-master ~]# systemctl enable keepalived
方式二:
# /etc/init.d/keepalived start
# /etc/init.d/keepalived start
# chkconfig --add keepalived
# chkconfig keepalived on
注意:在任意一臺機器作爲客戶端。在測試的時候記得檢查mysql用戶的可不可以遠程登錄。
用客戶端去連接測試
[root@client ~]# mysql -uroot -p -h 192.168.246.18
Enter password:
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| qf1 |
| test |
+--------------------+
可以看到qf1庫
停止節點1的mariadb服務,查看vip是否漂移
[root@mysql-keepalived-master ~]# systemctl stop mariadb
可以看到vip會漂移到節點2上面
再次用客戶端去連接測試
[root@client ~]# mysql -uroot -p -h 192.168.246.18
Enter password:
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| qf2 |
| test |
+--------------------+
可以看到qf1庫
MySQL+Keepalived實現自動切換
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