linux上mysql MM(双主)架构及keepalived搭建

master1 10.1.1.14 VIP 10.1.1.16
master2 10.1.1.15 VIP 10.1.1.16

一.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;

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

! Configuration File for keepalived
global_defs {
#设置报警通知邮件地址，可以设置多个
notification_email {
root@localhost
}
#设置邮件的发送地址
notification_email_from mysql@xiaomi.com
#设置smtp server的地址,该地址必须是存在的
smtp_server 127.0.0.1
#设置连接smtp server的超时时间
smtp_connect_timeout 30
#运行Keepalived服务器的标识，发邮件时显示在邮件标题中的信息
router_id mysql_ha
}
# 检测脚本
vrrp_script chk_mysql {
script "/etc/keepalived/mysqlcheck/check_slave.sh"
interval 2
weight 2
}
#定义VRRP实例,实例名自定义
vrrp_instance mysql-ha {
#指定Keepalived的角色，MASTER主机 BACKUP备份
state BACKUP #此处两个都设置为BACKUP
#指定HA监测的接口
interface eth0
#虚拟路由标识，这个标识是一个数字(1-255)，在一个VRRP实例中主备服务器ID必须一样
virtual_router_id 68
#优先级，数字越大优先级越高，在一个实例中主服务器优先级要高于备服务器
priority 100 #从服务器99
#设置主备之间同步检查的时间间隔单位秒
advert_int 1
#设置不抢占模式（DB1设置即可）
nopreempt
#设置验证类型和密码
authentication {
#验证类型有两种{PASS|HA}
auth_type PASS
#设置验证密码，在一个实例中主备密码保持一样
auth_pass centos
}
track_script {
chk_mysql # 执行监控的服务
}
#定义虚拟IP地址,可以有多个，每行一个
virtual_ipaddress {
10.1.1.16
}
}

2.编辑心跳检测脚本：
#vim /etc/keepalived/mysqlcheck/check_slave.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 172.25.0.41 -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 {
#设置报警通知邮件地址，可以设置多个
notification_email {
root@localhost
}
#设置邮件的发送地址
notification_email_from mysql@xiaomi.com
#设置smtp server的地址,该地址必须是存在的
smtp_server 127.0.0.1
#设置连接smtp server的超时时间
smtp_connect_timeout 30
#运行Keepalived服务器的标识，发邮件时显示在邮件标题中的信息
router_id mysql_ha
}
# 检测脚本
vrrp_script chk_mysql {
script "/etc/keepalived/mysqlcheck/check_slave.sh"
interval 2
weight 2
}
#定义VRRP实例,实例名自定义
vrrp_instance mysql-ha {
#指定Keepalived的角色，MASTER主机 BACKUP备份
state BACKUP #此处两个都设置为BACKUP
#指定HA监测的接口
interface eth0
#虚拟路由标识，这个标识是一个数字(1-255)，在一个VRRP实例中主备服务器ID必须一样
virtual_router_id 68
#优先级，数字越大优先级越高，在一个实例中主服务器优先级要高于备服务器
priority 90 #从服务器99
#设置主备之间同步检查的时间间隔单位秒
advert_int 1
#设置不抢占模式（DB1设置即可）
#nopreempt
#设置验证类型和密码
authentication {
#验证类型有两种{PASS|HA}
auth_type PASS
#设置验证密码，在一个实例中主备密码保持一样
auth_pass centos
}
track_script {
chk_mysql # 执行监控的服务
}
#定义虚拟IP地址,可以有多个，每行一个
virtual_ipaddress {
10.1.1.16
}
}

4.编辑检测脚本
# vim /etc/keepalived/mysqlcheck/check_slave.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 172.25.0.42 -w1 -c1 &>/dev/null
if [ $? -ne 0 ]
then
systemctl stop keepalived
killall keepalived
fi

5.vip漂移检测
1)master1和master2上同时开启keepalived和mysql
2)查看master1上ip地址
3)停掉master1上的mysql服务
4)观察master1和master2上的ip地址