keepalived+LVS高可用Director Server
RHEL6.6-x86-64主要软件：
keepalived-1.2.16.tar.gz
ipvsadm-1.26-4.el6.x86_64.rpm
Master Directory Server :192.168.1.5
Backup Directory Server:192.168.1.8
Real Server 1 :192.168.1.6
Real Server 2 : 192.168.1.7
VIP: 192.168.1.10
编译安装keepalived
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# tar xf keepalived-1.2.16.tar.gz
# cd keepalived-1.2.16
# ./configure --prefix=/usr/local/keepalived --sysconfdir=/etc
# make
# make install
编辑keepalived配置文件
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vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from keepalived@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER
interface eth1
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.1.10/24 dev eth1 label eth1:0
}
}
virtual_server 192.168.1.10 80 {
delay_loop 6
lb_algo rr
lb_kind DR
nat_mask 255.255.255.0
#persistence_timeout 50
protocol TCP
sorry_server 127.0.0.1 80
real_server 192.168.1.6 80 {
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.1.7 80 {
weight 1
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
# yum install ivsadm
192.168.1.8主机中
安装keepalived同192.168.1.5
配置文件中：
将“state MASTER" 改为 ”state BACKUP"
将"priority 100"改为比100小的值，这里改为“priority 70".
# yum install ipvsadm
配置Real server
编写Real Server脚本
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#/bin/bash
# Author xiaoming
# mail: xiaoming.linux@gmail.com
VIP=192.168.1.10
. /etc/init.d/functions
case "$1" in
start)
echo "Start Real Server "
/sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
route add -host $VIP dev lo:0
echo 1 > /proc/sys/net/ipv4/conf/eth1/arp_ignore
echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
echo 2 > /proc/sys/net/ipv4/conf/eth1/arp_announce
echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
;;
stop)
echo "Stop Real Server"
/sbin/ifconfig lo:0 down
route del $VIP
echo 0 > /proc/sys/net/ipv4/conf/eth1/arp_ignore
echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore
echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce
echo 0 > /proc/sys/net/ipv4/conf/eth1/arp_announce
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
分别在Real Server1和Real Server2上执行此脚本
配置完毕，分别在director server上启动keepalived服务，
查看LVS路由表信息
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# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP192.168.1.10:80 rr
-> 192.168.1.6:80 Route 1 0 0
-> 192.168.1.7:80 Route 1 0 0
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