mysql使用keepalived做高可用
- mysql+keepalived
- 主库服务器配置
- 从库服务器配置
- 两台服务器安装
mysql+keepalived
先做两台服务器数据库互为主从
主库服务器配置
开启binlog服务
mkdir -pv /data/ //创建存放binlog日志目录
chown mysql.mysql /data //修改目录所有者和属组vim /etc/my.cnf //mysql配置文件
server-id=175 //设置serverid
log-bin=/data/mysql-bin //设置logbin日志存放目录systemctl restart mysqld //修改mysql文件，需要重启服务创建一个提供远程复制的用户mysql> grant replication slave on *.* to 'replication'@'%' identified by '0'; //创建一个只有复制权限的用户
mysql> flush privileges; //刷新数据表
mysql> reset master; //重新记载binlog日志
mysql> show master status\G
mysql> CHANGE MASTER TO //配置从库连接主库信息MASTER_HOST='10.12.153.172',MASTER_USER='replication',MASTER_PASSWORD='0',MASTER_PORT=3306,MASTER_LOG_FILE='mysql-bin.000001',MASTER_LOG_POS=154,MASTER_CONNECT_RETRY=10;mysql>start slave;
mysql> show slave status\G
从库服务器配置
开启binlog服务
mkdir -pv /data/ //创建存放binlog日志目录
chown mysql.mysql /data //修改目录所有者和属组vim /etc/my.cnf //mysql配置文件
server-id=175 //设置serverid
log-bin=/data/mysql-bin //设置logbin日志存放目录systemctl restart mysqld //修改mysql文件，需要重启服务创建一个提供远程复制的用户mysql> grant replication slave on *.* to 'replication'@'%' identified by '0'; //创建一个只有复制权限的用户
mysql> flush privileges; //刷新数据表
mysql> reset master; //重新记载binlog日志
mysql> show master status\G
mysql> CHANGE MASTER TO //配置从库连接主库信息MASTER_HOST='10.12.153.172',MASTER_USER='replication',MASTER_PASSWORD='0',MASTER_PORT=3306,MASTER_LOG_FILE='mysql-bin.000001',MASTER_LOG_POS=154,MASTER_CONNECT_RETRY=10;mysql>start slave;
mysql> show slave status\G
两台服务器安装
yum -y install keepalivedmaster端设置
vim /etc/keepalived/keepalived.conf
! Configuration File for keepalivedglobal_defs {router_id master
}
vrrp_script check_run {script "/etc/keepalived/keepalived_chech_mysql.sh"interval 5
}vrrp_instance VI_1 {state MASTERinterface ens33virtual_router_id 89priority 100advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.246.100/24 #vip地址}track_script {check_run}
}backup端设置
vim /etc/keepalived/keepalived.conf
! Configuration File for keepalivedglobal_defs {router_id backup
}
vrrp_script check_run {script "/etc/keepalived/keepalived_check_mysql.sh"interval 5
}vrrp_instance VI_1 {state BACKUPnopreemptinterface ens33virtual_router_id 89priority 50advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.246.100/24}track_script {check_run}
}两台服务器都设置mysql检测脚本
vim /etc/keepalived/keepalived_check_mysql.sh
#!/bin/bash
/usr/bin/mysql -uroot -p'QianFeng@2019!' -e "show status" &>/dev/null
if [ $? -ne 0 ] ;then
# service keepalived stopsystemctl stop keepalived
fichmod +x /etc/keepalived/keepalived_check_mysql.shsystemctl start keepalived //启动keepalived
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