配置keepalive实现mysql双主高可用
配置keepalive实现mysql双主高可用1.安装keepalive
2。配置keepalive
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
router_idmysql_ha
}
vrrp_script check_mysqld {
script"/etc/keepalived/mysqlcheck/keepalived_check_mysql.sh "
interval 2
}
vrrp_instance HA_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 100
advert_int 1
nopreempt
authentication{
auth_typePASS
auth_pass1111
}
track_script {
check_mysqld
}
virtual_ipaddress {
192.168.32.100/24 dev eth0
}
}
两个keepalive的state都设置为BACKUP
检查mysql脚本keepalived_check_mysql.sh
#!/bin/bash
MYSQL=/usr/bin/mysql
MYSQL_HOST=localhost
MYSQL_USER=root
MYSQL_PASSWORD=www.123
CHECK_TIME=3
#mysqlis workingMYSQL_OK is 1 , mysql down MYSQL_OK is 0
MYSQL_OK=1
function check_mysql_helth (){
$MYSQL -h $MYSQL_HOST -u $MYSQL_USER -p${MYSQL_PASSWORD}-e "show status;" >/dev/null 2>&1
if [ $? = 0 ] ;then
MYSQL_OK=1
else
MYSQL_OK=0
fi
return $MYSQL_OK
}
while [ $CHECK_TIME -ne 0 ]
do
let "CHECK_TIME -= 1"
check_mysql_helth
if [ $MYSQL_OK = 1 ] ; then
CHECK_TIME=0
exit 0
fi
if [ $MYSQL_OK -eq 0 ] &&[ $CHECK_TIME -eq 0 ]
then
/etc/init.d/keepalived stop
exit 1
fi
sleep 1
done
/etc/init.d/keepalived start
测试高可用：关掉DB1的mysql时.他的vip会飘到DB2
测试mysql主从同步功能
1.在远程客户端通过vip登录测试
2.数据复制功能测试
在DB1中创建了一个数据库。在DB2查看是否有这个数据库
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