linux上mysql MM(雙主)及keepalived搭建

1、主備機IP及VIP規劃：
master1 10.1.1.14 VIP 10.1.1.16
master2    10.1.1.15 VIP 10.1.1.16

2、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.建立master1複製帳號
  grant replication slave,replication client on *.* to 'repl'@'10.1.1.15' identified by 'repl';
  
4.建立master2複製帳號
  grant replication slave,replication client on *.* to 'repl'@'10.1.1.14' identified by 'repl';
  
5.爲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.爲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.啓動slave
  master1:
  start slave;
  master2:
  start slave;

3、keepalived配置
1.編輯master1的keepalived配置文件
  #vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived
global_defs {
    #配置告警通知郵箱，能夠配置多個
   notification_email {
    root@localhost
   }
   #配置郵件發送目標地址
   notification_email_from mysql@xiaomi.com
   #配置smtp服務器地址,其必須存在
   smtp_server 10.1.1.11
   #配置鏈接smtp服務器的超時時間
   smtp_connect_timeout 30
   #設置運行Keepalived實例的標識，其將顯示於郵件標題中
   router_id mysql_ha
}
#監控腳本
vrrp_script chk_mysql {
    script "/etc/keepalived/check_mysql.sh"
    interval 2
    weight 2
}
#配置VRRP實例,實例命名任意
vrrp_instance mysql-ha {
    #配置Keepalived角色，MASTER爲主機 BACKUP爲備機，此處兩個都設置爲BACKUP
    state BACKUP 
    #配置keepalived監測的網絡接口
    interface eth0
    #虛擬路由標識，其爲一個(1-255)的數字，一個VRRP實例中主機的該ID必須相同
    virtual_router_id 66
    #服務器優先級，數字越大優先級越高，一個實例中主服務器優先級要高於備服務器
    priority 50  
    #配置主備服務器間同步檢查的時間間隔（秒）
    advert_int 1
    #配置服務器搶佔模式，這裏配置爲非搶佔模式（只需對master1配置便可）
    nopreempt
    #配置驗證類型和密碼
    authentication {
        #兩種驗證類型{PASS|HA}
        auth_type PASS
        #指定驗證密碼，一個實例中的主備服務器密碼要同樣
        auth_pass centos
    }
    track_script {
    #指定執行監控的服務
        chk_mysql
    }
    #配置虛擬IP,可指定有多個,每一個佔一行
    virtual_ipaddress {
    10.1.1.16
    }
}

2.編輯master1心跳檢測腳本：
#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.編輯master2的keepalived配置文件
# vim /etc/keepalived/keepalived.conf 

! Configuration File for keepalived
global_defs {
   #配置告警通知郵箱，能夠配置多個
   notification_email {
    root@localhost
   }
   #配置郵件發送目標地址
   notification_email_from mysql@xiaomi.com
   #配置smtp服務器地址,其必須存在
   smtp_server 10.1.1.11
   #配置鏈接smtp服務器的超時時間
   smtp_connect_timeout 30
   #設置運行Keepalived實例的標識，其將顯示於郵件標題中
   router_id mysql_ha
}
# 監控監本
vrrp_script chk_mysql {
    script "/etc/keepalived/check_mysql.sh"
    interval 2
    weight 2
}
#配置VRRP實例,實例命名任意
vrrp_instance mysql-ha {
    #配置Keepalived角色，MASTER爲主機 BACKUP爲備機，此處兩個都設置爲BACKUP
    state BACKUP
    #配置keepalived監測的網絡接口
    interface eth0
    #虛擬路由標識，其爲一個(1-255)的數字，一個VRRP實例中主機的該ID必須相同
    virtual_router_id 66
    #服務器優先級，數字越大優先級越高，一個實例中主服務器優先級要高於備服務器
    priority 49
    #配置主備服務器間同步檢查的時間間隔（秒）
    advert_int 1
    #配置服務器搶佔模式，這裏配置爲非搶佔模式（只需對master1配置便可）
    #nopreempt
    #配置驗證類型和密碼
    authentication {
        #兩種驗證類型{PASS|HA}
        auth_type PASS
        #指定驗證密碼，一個實例中的主備服務器密碼要同樣
        auth_pass centos
    }
    track_script {
    #指定執行監控的服務
        chk_mysql  
    }
    #配置虛擬IP,可指定有多個,每一個佔一行
    virtual_ipaddress {
    10.1.1.16
    }
}

4.編輯master2檢測腳本
# 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漂移檢測1)master1和master2上同時開啓keepalived和mysql  #service keepalived start  #service mysqld start2)查看master1上ip地址  ip addr3)登陸10.1.1.16上的mysql  mysql -uusername -ppassword -h10.1.1.16 -P33114)停掉master1上的mysql服務  service mysqld stop5)觀察master1和master2上的ip地址  ip addr6)繼續在3)中的session中運行mysql命令，看看發生了什麼  mysql> use information_schema;