linux上mysql MM(双主)及keepalived搭建

一、主备机IP及VIP规划：
master1 10.1.1.14 VIP 10.1.1.16
master2 10.1.1.15 VIP 10.1.1.16

二、mysql MM配置
1.修改master1的my.cnf
# vi /etc/my.cnf
[mysqld]
basedir = /usr/local/mysql/
datadir=/usr/local/mysql/data
log-error=/usr/local/mysql/mysqld.log
port = 3306
socket=/usr/local/mysql/mysql.sock
pid-file=/usr/local/mysql/mysql.pid

expire-logs-days=10

#binlog-do-db=db1
#binlog-ignore-db=db2

server-id = 1
log-bin = binlog
relay_log = relay-bin
log_slave_updates =1
auto_increment_increment=2
auto_increment_offset=1

2.修改master2的my.cnf
# vim /etc/my.cnf
[mysqld]
basedir = /usr/local/mysql/
datadir=/usr/local/mysql/data
log-error=/usr/local/mysql/mysqld.log
port = 3306
socket=/usr/local/mysql/mysql.sock
pid-file=/usr/local/mysql/mysql.pid

expire-logs-days=10

#binlog-do-db=db1
#binlog-ignore-db=db2

server-id=2
relay_log=relay-bin
log_bin =binlog
log_slave_updates =1
auto_increment_increment=2
auto_increment_offset=2

3.创建master1复制账号
grant replication slave,replication client on *.* to 'repl'@'10.1.1.15' identified by 'repl';

4.创建master2复制账号
grant replication slave,replication client on *.* to 'repl'@'10.1.1.14' identified by 'repl';

5.为master1配置master
show master status;
change master to master_host='10.1.1.15',master_user='repl',master_password='repl',master_log_file='binlog.000005',master_log_pos=154;

6.为master2配置master
show master status;
change master to master_host='10.1.1.14',master_user='repl',master_password='repl',master_log_file='binlog.000001',master_log_pos=154;

7.启动slave
master1:
start slave;
master2:
start slave;

三、keepalived配置
1.编辑master1的keepalived配置文件
#vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived
global_defs {
#配置告警通知邮箱，可以配置多个
notification_email {
root@localhost
}
#配置邮件发送目标地址
notification_email_from mysql@xiaomi.com
#配置smtp服务器地址,其必须存在
smtp_server 10.1.1.11
#配置连接smtp服务器的超时时间
smtp_connect_timeout 30
#设置运行Keepalived实例的标识，其将显示于邮件标题中
router_id mysql_ha
}
#监控脚本
vrrp_script chk_mysql {
script "/etc/keepalived/check_mysql.sh"
interval 2
weight 2
}
#配置VRRP实例,实例命名任意
vrrp_instance mysql-ha {
#配置Keepalived角色，MASTER为主机 BACKUP为备机，此处两个都设置为BACKUP
state BACKUP
#配置keepalived监测的网络接口
interface eth0
#虚拟路由标识，其为一个(1-255)的数字，一个VRRP实例中主机的该ID必须相同
virtual_router_id 66
#服务器优先级，数字越大优先级越高，一个实例中主服务器优先级要高于备服务器
priority 50
#配置主备服务器间同步检查的时间间隔（秒）
advert_int 1
#配置服务器抢占模式，这里配置为非抢占模式（只需对master1配置即可）
nopreempt
#配置验证类型和密码
authentication {
#两种验证类型{PASS|HA}
auth_type PASS
#指定验证密码，一个实例中的主备服务器密码要一样
auth_pass centos
}
track_script {
#指定执行监控的服务
chk_mysql
}
#配置虚拟IP,可指定有多个,每个占一行
virtual_ipaddress {
10.1.1.16
}
}

2.编辑master1心跳检测脚本：
#vi /etc/keepalived/check_mysql.sh

#!/bin/bash
#This scripts is check for Mysql Slave status
counter=$(netstat -na|grep "LISTEN"|grep "3311"|wc -l)
if [ "${counter}" -eq 0 ]; then
service keepalived stop
killall keepalived
fi
ping 10.1.1.14 -w1 -c1 &>/dev/null
if [ $? -ne 0 ]
then
systemctl stop keepalived
killall keepalived
fi

3.编辑master2的keepalived配置文件
# vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived
global_defs {
#配置告警通知邮箱，可以配置多个
notification_email {
root@localhost
}
#配置邮件发送目标地址
notification_email_from mysql@xiaomi.com
#配置smtp服务器地址,其必须存在
smtp_server 10.1.1.11
#配置连接smtp服务器的超时时间
smtp_connect_timeout 30
#设置运行Keepalived实例的标识，其将显示于邮件标题中
router_id mysql_ha
}
# 监控监本
vrrp_script chk_mysql {
script "/etc/keepalived/check_mysql.sh"
interval 2
weight 2
}
#配置VRRP实例,实例命名任意
vrrp_instance mysql-ha {
#配置Keepalived角色，MASTER为主机 BACKUP为备机，此处两个都设置为BACKUP
state BACKUP
#配置keepalived监测的网络接口
interface eth0
#虚拟路由标识，其为一个(1-255)的数字，一个VRRP实例中主机的该ID必须相同
virtual_router_id 66
#服务器优先级，数字越大优先级越高，一个实例中主服务器优先级要高于备服务器
priority 49
#配置主备服务器间同步检查的时间间隔（秒）
advert_int 1
#配置服务器抢占模式，这里配置为非抢占模式（只需对master1配置即可）
#nopreempt
#配置验证类型和密码
authentication {
#两种验证类型{PASS|HA}
auth_type PASS
#指定验证密码，一个实例中的主备服务器密码要一样
auth_pass centos
}
track_script {
#指定执行监控的服务
chk_mysql
}
#配置虚拟IP,可指定有多个,每个占一行
virtual_ipaddress {
10.1.1.16
}
}

4.编辑master2检测脚本
# vim /etc/keepalived/check_mysql.sh

#!/bin/bash
#This scripts is check for Mysql Slave status
counter=$(netstat -na|grep "LISTEN"|grep "3306"|wc -l)
if [ "${counter}" -eq 0 ]; then
systemctl stop keepalived
killall keepalived
fi
ping 10.1.1.15 -w1 -c1 &>/dev/null
if [ $? -ne 0 ]
then
service keepalived stop
killall keepalived
fi

5.vip漂移检测
1)master1和master2上同时开启keepalived和mysql
#service keepalived start
#service mysqld start
2)查看master1上ip地址
ip addr
3)登录10.1.1.16上的mysql
mysql -uusername -ppassword -h20.1.1.16 -P3311
4)停掉master1上的mysql服务
service mysqld stop
5)观察master1和master2上的ip地址
ip addr
6)继续在3)中的session中运行mysql命令，看看发生了什么
mysql> use information_schema;