nginx+keepalived(非搶佔模式)

vip 100
100 45
90 46

主

[root@c7-45 ~]# yum -y install keepalived

[root@c7-45 ~]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
   router_id 10.0.0.45
   script_user root
   enable_script_security
}
vrrp_script chk_nginx {
    script "/etc/keepalived/check_port.sh 80"
    interval 2
    weight -30
}
vrrp_instance VI_1 {
    state BACKUP
    interface ens33
    virtual_router_id 251
    priority 100
    advert_int 1
    mcast_src_ip 10.0.0.45
    nopreempt
    authentication {
        auth_type PASS
        auth_pass 11111111
    }
    track_script {
         chk_nginx
    }
    virtual_ipaddress {
        10.0.0.100
    }
}

[root@c7-45 keepalived]# cat /etc/keepalived/check_port.sh
CHK_PORT=$1
 if [ -n "$CHK_PORT" ];then
        PORT_PROCESS=`ss -lntp|grep $CHK_PORT|wc -l`
        if [ $PORT_PROCESS -eq 0 ];then
                echo "Port $CHK_PORT Is Not Used,End."
                systemctl stop keepalived.service
        fi
 else
        echo "Check Port Cant Be Empty!"
 fi

[root@c7-45 ~]# cat /usr/lib/systemd/system/keepalived.service
[Unit]
Description=LVS and VRRP High Availability Monitor
After=syslog.target network-online.target

[Service]
Type=forking
PIDFile=/var/run/keepalived.pid
#KillMode=process
EnvironmentFile=-/etc/sysconfig/keepalived
ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS
ExecReload=/bin/kill -HUP $MAINPID

[Install]
WantedBy=multi-user.target

[root@c7-45 ~]# systemctl  start keepalived.service
[root@c7-45 ~]# ip a

檢測

[root@c7-45 ~]# killall /usr/local/nginx/sbin/nginx

從

[root@c7-46 ~]#yum -y install keepalived

[root@c7-46 ~]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
   router_id 10.0.0.46
   script_user root
   enable_script_security
}
vrrp_script chk_nginx {
    script "/etc/keepalived/check_port.sh 80"
    interval 2
    weight -30
}
vrrp_instance VI_1 {
    state BACKUP
    interface ens33
    virtual_router_id 251
    priority 90
    advert_int 1
    mcast_src_ip 10.0.0.46
    nopreempt
    authentication {
        auth_type PASS
        auth_pass 11111111
    }
    track_script {
         chk_nginx
    }
    virtual_ipaddress {
        10.0.0.100
    }
}

[root@c7-46 ~]# cat /etc/keepalived/check_port.sh
CHK_PORT=$1
 if [ -n "$CHK_PORT" ];then
        PORT_PROCESS=`ss -lntp|grep $CHK_PORT|wc -l`
        if [ $PORT_PROCESS -eq 0 ];then
                echo "Port $CHK_PORT Is Not Used,End."
                systemctl stop keepalived.service
        fi
 else
        echo "Check Port Cant Be Empty!"
 fi

[root@c7-46 ~]# cat /usr/lib/systemd/system/keepalived.service
[Unit]
Description=LVS and VRRP High Availability Monitor
After=syslog.target network-online.target

[Service]
Type=forking
PIDFile=/var/run/keepalived.pid
#KillMode=process
EnvironmentFile=-/etc/sysconfig/keepalived
ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS
ExecReload=/bin/kill -HUP $MAINPID

[Install]
WantedBy=multi-user.target

[root@c7-46 ~]# systemctl restart keepalived.service