linux上mysql MM(雙主)及keepalived搭建

一、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

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.建立master1複製賬號
  grant replication slave,replication client on *.* to 'repl'@'10.1.1.15' identified by 'repl';
  
4.建立master2複製賬號
  grant replication slave,replication client on *.* to 'repl'@'10.1.1.14' identified by 'repl';
  
5.為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.為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.啟動slave
  master1:
  start slave;
  master2:
  start slave;

三、keepalived配置
1.編輯master1的keepalived配置檔案
  #vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived
global_defs {
    #配置告警通知郵箱，可以配置多個
   notification_email {
    root@localhost
   }
   #配置郵件傳送目標地址
   notification_email_from mysql@xiaomi.com
   #配置smtp伺服器地址,其必須存在
   smtp_server 10.1.1.11
   #配置連線smtp伺服器的超時時間
   smtp_connect_timeout 30
   #設定執行Keepalived例項的標識，其將顯示於郵件標題中
   router_id mysql_ha
}
#監控指令碼
vrrp_script chk_mysql {
    script "/etc/keepalived/check_mysql.sh"
    interval 2
    weight 2
}
#配置VRRP例項,例項命名任意
vrrp_instance mysql-ha {
    #配置Keepalived角色，MASTER為主機 BACKUP為備機，此處兩個都設定為BACKUP
    state BACKUP 
    #配置keepalived監測的網路介面
    interface eth0
    #虛擬路由標識，其為一個(1-255)的數字，一個VRRP例項中主機的該ID必須相同
    virtual_router_id 66
    #伺服器優先順序，數字越大優先順序越高，一個例項中主伺服器優先順序要高於備伺服器
    priority 50  
    #配置主備伺服器間同步檢查的時間間隔（秒）
    advert_int 1
    #配置伺服器搶佔模式，這裡配置為非搶佔模式（只需對master1配置即可）
    nopreempt
    #配置驗證型別和密碼
    authentication {
        #兩種驗證型別{PASS|HA}
        auth_type PASS
        #指定驗證密碼，一個例項中的主備伺服器密碼要一樣
        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,每個佔一行
    virtual_ipaddress {
    10.1.1.16
    }
}

2.編輯master1心跳檢測指令碼：
#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配置檔案
# vim /etc/keepalived/keepalived.conf 

! Configuration File for keepalived
global_defs {
   #配置告警通知郵箱，可以配置多個
   notification_email {
    root@localhost
   }
   #配置郵件傳送目標地址
   notification_email_from mysql@xiaomi.com
   #配置smtp伺服器地址,其必須存在
   smtp_server 10.1.1.11
   #配置連線smtp伺服器的超時時間
   smtp_connect_timeout 30
   #設定執行Keepalived例項的標識，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例項,例項命名任意
vrrp_instance mysql-ha {
    #配置Keepalived角色，MASTER為主機 BACKUP為備機，此處兩個都設定為BACKUP
    state BACKUP
    #配置keepalived監測的網路介面
    interface eth0
    #虛擬路由標識，其為一個(1-255)的數字，一個VRRP例項中主機的該ID必須相同
    virtual_router_id 66
    #伺服器優先順序，數字越大優先順序越高，一個例項中主伺服器優先順序要高於備伺服器
    priority 49
    #配置主備伺服器間同步檢查的時間間隔（秒）
    advert_int 1
    #配置伺服器搶佔模式，這裡配置為非搶佔模式（只需對master1配置即可）
    #nopreempt
    #配置驗證型別和密碼
    authentication {
        #兩種驗證型別{PASS|HA}
        auth_type PASS
        #指定驗證密碼，一個例項中的主備伺服器密碼要一樣
        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,每個佔一行
    virtual_ipaddress {
    10.1.1.16
    }
}

4.編輯master2檢測指令碼
# 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上同時開啟keepalived和mysql
  #service keepalived start
  #service mysqld start
2)檢視master1上ip地址
  ip addr
3)登入10.1.1.16上的mysql
  mysql -uusername -ppassword -h10.1.1.16 -P3311
4)停掉master1上的mysql服務
  service mysqld stop
5)觀察master1和master2上的ip地址
  ip addr
6)繼續在3)中的session中執行mysql命令，看看發生了什麼
  mysql> use information_schema;