说明:
lvs+keepalived-master 172.16.0.111
lvs+keepalived-backup 172.16.0.112
web-1 172.16.0.113
web-2 172.16.0.114
VIP 172.16.0.100
lvs管理工具ipvsadm
keepalived-1.3.5.tar.gz
1.查看是否支持lvs
[root@lvs-master ~]# cat /boot/config-2.6.32-573.el6.x86_64
[root@lvs-master ~]# modprobe -l |grep ipvs
2.lvs主备服务器安装keepalived
[root@lvs-master ~]# tar zxvf keepalived-1.3.5.tar.gz
[root@lvs-master ~]# cd keepalived-1.3.5
[root@lvs-master keepalived-1.3.5]# ./configure --prefix=/usr/local/keepalived
[root@lvs-master keepalived]# make && make install
3.配置keepalived用service命令启动
a.复制/sbin/keepalived到/usr/sbin下
[root@lvs-master ~]# cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
b.复制sysconfig文件到/etc/sysconfig下
[root@lvs-master ~]# cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
c.复制启动脚本到/etc/init.d下
[root@lvs-master ~]# cp ~/keepalived-1.3.5/keepalived/etc/init.d/keepalived /etc/init.d/
d.keepalived默认会读取/etc/keepalived/keepalived.conf配置文件
[root@lvs-master ~]# mkdir /etc/keepalived
[root@lvs-master ~]# cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf
4.编辑keepalived配置文件
a.主服务器上如下
[root@lvs-master keepalived-1.3.5]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.16.0.100
}
}
virtual_server 172.16.0.100 80 {
delay_loop 6
lb_algo rr
lb_kind DR
persistence_timeout 50
protocol TCP
real_server 172.16.0.113 80 {
weight 1
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
}
}
real_server 172.16.0.114 80 {
weight 1
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
b.备服务器上配置文件做如下修改
state ------>BACKUP #与MASTER对应
priority ------>90 #小于100
c.启动
[root@lvs-master ~]# service keepalived start
[root@lvs-master ~]# chkconfig keepalived on
5.配置web服务器
[root@web-1 init.d]# vim /etc/init.d/realserver
#!/bin/bash
SNS_VIP=172.16.0.100
/etc/rc.d/init.d/functions
case "$1" in
start)
ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP
/sbin/route add -host $SNS_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 $SNS_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
[root@web-1 init.d]# chmod 755 realserver
[root@web-1 init.d]# service realserver start
6.安装lvs管理工具
[root@lvs-master ~]# yum install ipvsadm
[root@lvs-master ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 172.16.0.100:80 rr persistent 50
-> 172.16.0.113:80 Route 1 0 0
-> 172.16.0.114:80 Route 1 0 0
7.测试
略