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keepalived+MySQL主主高可用-創(chuàng)新互聯(lián)

keepalived+MySQL主主高可用

一、環(huán)境介紹:

10.1.1.174:23316 M1
10.1.1.237:23316 M2

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二、配置雙主:略。
三、keepalive安裝
[root@master1 ~]# cd /usr/local/src/

[root@master1 src]# wget https://www.keepalived.org/software/keepalived-2.0.17.tar.gz

[root@master1 src]# tar -xf keepalived-2.0.17.tar.gz

[root@master1 src]# cd keepalived-2.0.17

[root@master1 keepalived-2.0.17]# yum install openssl* libnl‐dev* gcc-c++

[root@master1 keepalived-2.0.17]# ./configure --prefix=/usr/local/keepalived

[root@master1 keepalived-2.0.17]# make

[root@master1 keepalived-2.0.17]# make install
cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
echo "/etc/init.d/keepalived start" >> /etc/rc.local
mkdir -p  /etc/keepalived/
mv /etc/keepalived/keepalived.conf /root/keepalived.conf.bak
M1:keepalive配置文件:
vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived

vrrp_script chk_mysql_port {     #檢測mysql服務(wù)是否在運(yùn)行。有很多方式,比如進(jìn)程,用腳本檢測等等
    script "/etc/keepalived/chk_mysql.sh"   #這里通過腳本監(jiān)測
    interval 2                   #腳本執(zhí)行間隔,每2s檢測一次
   weight -5                    #腳本結(jié)果導(dǎo)致的優(yōu)先級變更,檢測失敗(腳本返回非0)則優(yōu)先級 -5
    fall 2                    #檢測連續(xù)2次失敗才算確定是真失敗。會用weight減少優(yōu)先級(1-255之間)
    rise 1                    #檢測1次成功就算成功。但不修改優(yōu)先級
}

vrrp_instance VI_1 {
    state MASTER    
    interface ens192      #指定虛擬ip的網(wǎng)卡接口,改成你自己的 eth0或者其它什么的
   # mcast_src_ip 10.1.1.174
    virtual_router_id 51    #路由器標(biāo)識,MASTER和BACKUP必須是一致的
    priority 101            #定義優(yōu)先級,數(shù)字越大,優(yōu)先級越高,在同一個(gè)vrrp_instance下,MASTER的優(yōu)先級必須大于BACKUP的優(yōu)先級。這樣MASTER故障恢復(fù)后,就可以將VIP資源再次搶回來 
    unicast_src_ip  10.1.1.174 ##(本地IP地址)
    unicast_peer {
                  10.1.1.237 ##(對端IP地址)此地址一定不能忘記
                       }
    advert_int 1         
    authentication {   
        auth_type PASS 
        auth_pass 1111     
    }
    virtual_ipaddress {    
        10.1.1.111
    }

track_script {               
   chk_mysql_port             
}
}
[root@crm-db01 ~]# cat /etc/keepalived/chk_mysql.sh         #####注意可執(zhí)行權(quán)限
#!/bin/bash
counter=$(netstat -na|grep "LISTEN"|grep "23316"|wc -l)
if [ "${counter}" -eq 0 ]; then
    /etc/init.d/keepalived stop
fi
M2:keepalived配置文件:
[root@#localhost keepalived]# cat keepalived.conf
! Configuration File for keepalived

vrrp_script chk_mysql_port {
    script "/etc/keepalived/chk_mysql.sh"
    interval 2
   weight -5
    fall 2
    rise 1
}

vrrp_instance VI_1 {
    state BACKUP
    interface ens192             #指定虛擬ip的網(wǎng)卡接口,改成你自己的 eth0或者其它什么的        
    #mcast_src_ip 10.1.1.237
    virtual_router_id 51
    priority 90
    unicast_src_ip  10.1.1.237 ##(本地IP地址)
    unicast_peer {
                  10.1.1.174       ##(對端IP地址)此地址一定不能忘記
                       }
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        10.1.1.111
    }

track_script {
   chk_mysql_port
}
}

[root@#localhost keepalived]# cat chk_mysql.sh           #####注意可執(zhí)行權(quán)限
#!/bin/bash
counter=$(netstat -na|grep "LISTEN"|grep "23316"|wc -l)
if [ "${counter}" -eq 0 ]; then
    /etc/init.d/keepalived stop
fi
啟動keepalived服務(wù)
[root@master1 ~]# /etc/init.d/keepalived start
常用命令:
/etc/init.d/keepalived restart|start|stop
/etc/init.d/mysqld restart|start|stop
查看keepalive狀態(tài):
systemctl status keepalived.service
查看日志:
tail -f /var/log/messages
四、可能出現(xiàn)的問題:
1.啟動兩個(gè)keepalived ,兩邊都有VIP。
我這個(gè)配置文件已經(jīng)修改過,應(yīng)該不會出現(xiàn)這個(gè)情況。
2.VIP起來后,無法通過VIP訪問MySQL數(shù)據(jù)庫。
關(guān)閉防火墻或者開放相關(guān)端口。
查看你的MySQL配置文件,看看有沒有這個(gè)參數(shù)#bind-address = 10.1.1.237,有的話注釋掉,重啟數(shù)據(jù)庫。

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文章名稱:keepalived+MySQL主主高可用-創(chuàng)新互聯(lián)
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