Mysql+Keepalived雙主熱備高可用操作記錄

Mysql+Keepalived雙主熱備高可用操作記錄

環境:

ubuntu18.04.2

mysql5.7.21

 1 #1）安裝keepalived並將其配置成系統服務。master1和master2兩台機器上同樣進行如下操作：
 2 apt-get install libssl-dev
 3 apt-get install openssl
 4 apt-get install libpopt-dev
 5 [root@master1 ~]# cd /usr/local/src/
 6 [root@master1 src]# wget http://www.keepalived.org/software/keepalived-1.3.5.tar.gz
 7 [root@master1 src]# tar -zvxf keepalived-1.3.5.tar.gz
 8 [root@master1 src]# cd keepalived-1.3.5
 9 [root@master1 keepalived-1.3.5]# ./configure --prefix=/usr/local/keepalived
10 [root@master1 keepalived-1.3.5]# make && make install
11 mkdir /etc/sysconfig
12 cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
13 cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
14 cp /usr/local/keepalived/sbin/keepalived /sbin/
15 mkdir /etc/keepalived
16 cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/

實現高可用之前確保自己的mysql已經是主備或者互為主備了,mysql互為主備操作請看我上篇文章: https://www.cnblogs.com/-admin-/p/11654318.html

本次設置的ip:
vip:192.168.85.142
01:192.168.85.140
02:192.168.85.141

請各位按照自己的需求更改相應ip

#01的keepalived.conf配置
! Configuration File for keepalived
       
global_defs {
notification_email {
    759571872@qq.com
#報警郵件接收人的地址
}
       
notification_email_from 759571872@qq.com
smtp_server 127.0.0.1 
smtp_connect_timeout 30
ubuntu001
}
       
vrrp_script chk_mysql_port {     
#檢測mysql服務是否在運行。有很多方式，比如進程，用腳本檢測等等
    script "/opt/chk_mysql.sh"   
    #這裡通過腳本監測
    interval 2                   
    #腳本執行間隔，每2s檢測一次
    weight -5                    
    #腳本結果導致的優先順序變更，檢測失敗（腳本返回非0）則優先順序 -5
    fall 2                    
    #檢測連續2次失敗才算確定是真失敗。會用weight減少優先順序（1-255之間）
    rise 1                    
    #檢測1次成功就算成功。但不修改優先順序
}
       
vrrp_instance VI_1 {
    state MASTER    
    interface ens33      
    #指定虛擬ip的網卡介面
    mcast_src_ip 192.168.85.140
    virtual_router_id 51    
    #路由器標識，MASTER和BACKUP必須是一致的
    priority 101            
    #定義優先順序，數字越大，優先順序越高，在同一個vrrp_instance下，MASTER的優先順序必須大於BACKUP的優先順序。這樣MASTER故障恢復後，就可以將VIP資源再次搶回來 
    advert_int 1         
    authentication {   
        auth_type PASS 
        auth_pass 123456     
    }
    virtual_ipaddress {    
        192.168.85.142
    }
      
track_script {               
   chk_mysql_port             
}
}

01伺服器配置完畢.

接下來配置02伺服器:

#02的keepalived.conf配置
! Configuration File for keepalived
       
global_defs {
notification_email {
    759571872@qq.com
#報警郵件接收人的地址
}
       
notification_email_from 759571872@qq.com
smtp_server 127.0.0.1 
smtp_connect_timeout 30
ubuntu002
}
       
vrrp_script chk_mysql_port {     
#檢測mysql服務是否在運行。有很多方式，比如進程，用腳本檢測等等
    script "/opt/chk_mysql.sh"   
    #這裡通過腳本監測
    interval 2                   
    #腳本執行間隔，每2s檢測一次
    weight -5                    
    #腳本結果導致的優先順序變更，檢測失敗（腳本返回非0）則優先順序 -5
    fall 2                    
    #檢測連續2次失敗才算確定是真失敗。會用weight減少優先順序（1-255之間）
    rise 1                    
    #檢測1次成功就算成功。但不修改優先順序
}
       
vrrp_instance VI_1 {
    state BACKUP    
    interface ens33      
    #指定虛擬ip的網卡介面
    mcast_src_ip 192.168.85.141
    virtual_router_id 51    
    #路由器標識，MASTER和BACKUP必須是一致的
    priority 99            
    #定義優先順序，數字越大，優先順序越高，在同一個vrrp_instance下，MASTER的優先順序必須大於BACKUP的優先順序。這樣MASTER故障恢復後，就可以將VIP資源再次搶回來 
    advert_int 1         
    authentication {   
        auth_type PASS 
        auth_pass 123456     
    }
    virtual_ipaddress {    
        192.168.85.142
    }
      
track_script {               
   chk_mysql_port             
}
}

編寫腳本:

#vi /opt/chk_mysql.sh
#!/bin/bash
counter=$(netstat -na|grep "LISTEN"|grep "3306"|wc -l)
if [ "${counter}" -eq 0 ]; then
    /etc/init.d/keepalived stop
fi

至此,Mysql+Keepalived雙主熱備高可用已經配置完畢.