两台机器(centos7系统)安装mysql
bash
[root@mysql-keep-master ~]# wget https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm
[root@mysql-keep-master ~]# rpm -ivh mysql80-community-release-el7-3.noarch.rpm
[root@mysql-keep-master ~]# yum -y install yum-utils #安装yum工具包
[root@mysql-keep-master ~]# vim /etc/yum.repos.d/mysql-community.repo
bash
安装mysql
[root@mysql-keep-master ~]# yum install -y mysql-community-server
[root@mysql-keep-master ~]# systemctl start mysqld
[root@mysql-keep-master ~]# systemctl enable mysqld
修改密码
[root@mysql-keep-master ~]# grep pass /var/log/mysqld.log
2020-02-18T13:54:25.706635Z 1 [Note] A temporary password is generated for root@localhost: %baWi=4!NsT)
[root@mysql-keep-master ~]# mysqladmin -uroot -p'%baWi=4!NsT)' password 'Admin@123!'制作互为主从:
root@mysql-keep-master \~\]# vim /etc/my.cnf #编辑配置文件开启gtid
log-bin=m1.log
server-id=1
gtid_mode = ON #开启gtid
enforce_gtid_consistency=1 #强制gtid移植性
\[root@mysql-keep-master \~\]# systemctl restart mysqld
\[root@mysql-keep-master \~\]# mysql -uroot -p'Admin@123!' #登录数据库
mysql\> GRANT ALL ON \*.\* TO 'root'@'%' IDENTIFIED BY 'Admin@123'; #创建远程登录用户
mysql\> flush privileges;
mysql\> grant replication slave,reload,super on \*.\* to 'slave'@'%' identified by 'Admin@123'; ---创建主从授权用户
mysql\> flush privileges; #刷新授权
mysql\> \\e #指定主服务器信息
CHANGE MASTER TO
MASTER_HOST='192.168.58.136', #指定主服务器的ip或者主机名
MASTER_USER='slave', #授权用户
MASTER_PASSWORD='QianFeng@123', #授权用户密码
master_auto_position=1
-\> ;
启动slave
mysql\> start slave;
[root@mysql-keep-backup ~]# vim /etc/my.cnf
log-bin=m2.log
server-id=2
gtid_mode = ON
enforce_gtid_consistency=1
[root@mysql-keep-backup ~]# systemctl restart mysqld
[root@mysql-keep-backup ~]# mysql -uroot -p'QianFeng@123!'
mysql> GRANT ALL ON *.* TO 'root'@'%' IDENTIFIED BY 'QianFeng@123';
mysql> flush privileges;
mysql> grant replication slave,reload,super on *.* to 'slave'@'%' identified by 'QianFeng@123';
mysql> flush privileges;
指定主服务器信息
mysql> \e
CHANGE MASTER TO
MASTER_HOST='192.168.58.135',
MASTER_USER='slave',
MASTER_PASSWORD='QianFeng@123',
master_auto_position=1
-> ;
启动slave
mysql> start slave;
两台机器验证是否为yes
mysql\> show slave status\\G
两台机器安装keepalived
[root@mysql-keep-master ~]# yum -y install keepalived
[root@mysql-keep-master ~]# cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
[root@mysql-keep-master ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id master1
}
vrrp_instance VI_1 {
state MASTER
interface ens33
virtual_router_id 80
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.58.16/24
}
}
将配置文件拷贝到backu机器
[root@mysql-keep-backup ~]# mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
[root@mysql-keep-master ~]# scp /etc/keepalived/keepalived.conf 192.168.58.136:/etc/keepalived/
[root@mysql-keep-backup ~]# vim /etc/keepalived/keepalived.conf #修改如下
! Configuration File for keepalived
global_defs {
router_id backup1
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 80
priority 50
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.58.16/24
}
}
两台机器启动keepalived
[root@mysql-keep-master ~]# systemctl start keepalived
[root@mysql-keep-backup ~]# systemctl start keepalived
[root@mysql-keep-master ~]# ip a #vip在master上面
1: lo: