LVS：Linux Virtual Server
+++++++++++++Info+++++++++++
VIP:172.18.20.222
LVS-Master IP：172.18.20.206
LVS-Backup IP：172.18.20.207
Realserver1IP：172.18.20.208
Realserver2IP：172.18.20.209
service iptables stop
chkconfig iptables off
setenforce 0
getenforce ->Permissive
++++++++++++keepalived+ipvsadm++++++++++
yum -y install openssl openssl-devel keepalived ipvsadm
===================vi /etc/keepalived/keepalived.conf=================== { #Group VIP and port
delay_loop 6
lb_algo wrr
lb_kind DR
nat_mask 255.255.255.0
persistence_timeout 50
protocol TCP
real_server 172.18.20.208 { #realserver1
weight 3
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 172.18.20.209 80 { #realserver2
weight 3
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
===================vi /etc/keepalived/keepalived.conf===================
service keepalived start
chkconfig keepalived on
tail -f /var/log/messages
===================vi realserver ==================================realserver1 and realserver2
#!/bin/bash
VIP=172.18.20.222
. /etc/rc.d/init.d/functions
case "$1" in
start)
ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
/sbin/route add -host $VIP dev lo:0
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/all/arp_ignore
echo "2">/proc/sys/net/ipv4/conf/all/arp_announce
sysctl -p >/dev/null 2>&1
echo "realServer Start ok"
;;
stop)
ifconfig lo:0 down
route del $VIP >/dev/null 2>&1
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/all/arp_ignore
echo "0">/proc/sys/net/ipv4/conf/all/arp_announce
echo "realServer Stoped"
;;
*)
echo "Usage:$0{start|stop}"
exit 1
esac
exit 0
===================vi realserver ===================realserver1 and realserver2
chmod 777 realserver
service realserver start
ip add list #check eth0
ipvsadm -Ln #check IPVS