lvs+keepalived

主机	作用
192.168.88.140	keepalived主  lvs-ds
192.168.88.144	keepalived备  lvs-ds
192.168.88.136	lvs-rs    web服务器
192.168.88.139	lvs-rs    web服务器

1、keepalived

主

! Configuration File for keepalived

global_defs {
   notification_email {
     [email protected]
     [email protected]
     [email protected]
   }
   notification_email_from [email protected]
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL1
}


vrrp_instance VI_1 {
    state MASTER
    interface ens160
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.88.11
    }
}

virtual_server 192.168.88.11 80 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    nat_mask 255.255.255.0
    protocol TCP

real_server 192.168.88.136 80 {
    weight 1
    TCP_CHECK {
        connect_timeout 8
        nb_get_retry 3
        delay_before_retry 3
        connect_prot 80
}
}
real_server 192.168.88.139 80 {
    weight 1
    TCP_CHECK {
        connect_timeout 8
        nb_get_retry 3
        delay_before_retry 3
        connect_prot 80
}
}
}

备

! Configuration File for keepalived

global_defs {
   notification_email {
     [email protected]
     [email protected]
     [email protected]
   }
   notification_email_from [email protected]
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL2
}

vrrp_instance VI_1 {
    state BACKUP
    interface ens160
    virtual_router_id 51
    priority 80
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.88.11
    }
}

virtual_server 192.168.88.11 80 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    nat_mask 255.255.255.0
    protocol TCP

real_server 192.168.88.136 80 {
    weight 1
    TCP_CHECK {
	connect_timeout 8
	nb_get_retry 3
	delay_before_retry 3
	connect_prot 80
}
}
real_server 192.168.88.139 80 {
    weight 1
    TCP_CHECK {
        connect_timeout 8
        nb_get_retry 3
        delay_before_retry 3
        connect_prot 80
}
}
}

2、web服务和rs

写rs脚本

vim  /etc/init.d/lvs_rs

#!/bin/sh
#
# Startup script handle the initialisation of LVS
# chkconfig: - 28 72
# description: Initialise the Linux Virtual Server for DR
#
### BEGIN INIT INFO
# Provides: ipvsadm
# Required-Start: $local_fs $network $named
# Required-Stop: $local_fs $remote_fs $network
# Short-Description: Initialise the Linux Virtual Server
# Description: The Linux Virtual Server is a highly scalable and highly
# available server built on a cluster of real servers, with the load
# balancer running on Linux.
# description: start LVS of DR-RIP
LOCK=/var/lock/ipvsadm.lock
VIP=192.168.88.11
. /etc/rc.d/init.d/functions
start() {
	PID=`ifconfig | grep lo:11 | wc -l`
	if [ $PID -ne 0 ];
	then
		echo "The LVS-DR-RIP Server is already running !"
	else
		/sbin/ifconfig lo:11 $VIP netmask 255.255.255.255 broadcast $VIP up
		/sbin/route add -host $VIP dev lo:11
		echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
		echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
		echo "1" >/proc/sys/net/ipv4/conf/ens160/arp_ignore
		echo "2" >/proc/sys/net/ipv4/conf/ens160/arp_announce
		echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
		echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
		/bin/touch $LOCK
		echo "starting LVS-DR-RIP server is ok !"
	fi
}
stop() {
		/sbin/route del -host $VIP dev lo:11
		/sbin/ifconfig lo:11 down >/dev/null
		echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
		echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
		echo "0" >/proc/sys/net/ipv4/conf/ens160/arp_ignore
		echo "0" >/proc/sys/net/ipv4/conf/ens60/arp_announce
		echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
		echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
		rm -rf $LOCK
		echo "stopping LVS-DR-RIP server is ok !"
}
status() {
	if [ -e $LOCK ];
	then
		echo "The LVS-DR-RIP Server is already running !"
	else
		echo "The LVS-DR-RIP Server is not running !"
fi
}
case "$1" in
	start)
		start
		;;
	stop)
		stop
		;;
	restart)
		stop
		start
		;;
	status)
		status
		;;
*)
		echo "Usage: $1 {start|stop|restart|status}"
		exit 1
esac
exit 0

/etc/init.d/lvs_rs start
systemctl restart nginx