實驗拓撲如下：
二、服務器ip配置信息
1. ip_lb 主機(master) :
2.ip_lb_2 主機 (backup)
3.web1 主機
4.web2 主
三、在master和backup分別查看是否有ipvsadm軟件
1. 檢查ipvsadm是否安裝
rpm -qa ipvsadm*
rpm -vih ipvsadm*
yum install -y ipvsadm*
yum 配置文件
[maweibing]
named=maweibing
baseurl=file:///mnt/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
2. 檢查模版是否加入內核
四、分別在web1和web2上面安裝apache服務.
# 安裝apache服務不說明了. 開放的端口是:80
1. keepalived-1.2.1.tar.gz # 解壓這個文件並且安裝 (tar -zxvf keepalived-1.2.1.tar.gz)
2. ./configure --prefix=/home/keepalived/ --with-kernel-dir=/usr/src/kernels/2.6.18-164.el5-i686
3.make
4.make install
5.配置文件的路徑
cp /home/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
cp /home/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
cp /home/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/
cp /home/keepalived/sbin/keepalived /sbin/
6.配置keepalived.conf文件.( ip_lb 主機<master> )
vim /etc/keepalived/keepalived.conf
#global define
global_defs {
router_id LVS_T1
}
vrrp_sync_group bl_group {
group {
bl_one
}
}
vrrp_instance bl_one {
state MASTER
interface eth0
lvs_sync_daemon_interface eth0
virtual_router_id 38
priority 150
advert_int 3
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.96.100
}
}
virtual_server 192.168.96.100 8099 {
delay_loop 3
lb_algo rr
lb_kind DR
persistence_timeout 1
protocol TCP
real_server 192.168.96.33 8099 {
weight 1
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 8099
}
}
real_server 192.168.96.4 8099 {
weight 1
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 8099
}
}
}
7、配置keepalived.conf文件.(ip_lb_2 主機 <backup> )
vim /etc/keepalived/keepalived.conf
#global define
global_defs {
router_id LVS_T2
}
vrrp_sync_group bl_group {
group {
bl_one
}
}
vrrp_instance bl_one {
state BACKUP
interface eth0
lvs_sync_daemon_interface eth0
virtual_router_id 38
priority 120
advert_int 3
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.96.100
}
}
virtual_server 192.168.96.100 8099 {
delay_loop 3
lb_algo rr
lb_kind DR
persistence_timeout 1
protocol TCP
real_server 192.168.96.33 8099 {
weight 1
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 8099
}
}
real_server 192.168.96.4 8099 {
weight 1
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 8099
}
}
}
8. 分別在主備上啓動keepalived
[root@ip_lb home]# /etc/init.d/keepalived start
Starting keepalived: [ OK ]
[root@ip_lb home]# tail -f /var/log/message
# PS:這裏說的LVS.並不是用ipvsadm軟件配置.而是直接用keepalived的virtual_server配置項控制的.
# 安裝ipvsadm只是可以看到負載狀況.其實只需要keepalived也可以實現負載均衡集羣.
六、在web1和web2主機上配置LVS-DR的相關配置.
1. vim /etc/init.d/lvsDR_node （web1主機）
#! /bin/sh
# descript : start real server DR
VIP=192.168.96.100
. /etc/rc.d/init.d/functions
case "$1" in
start)
echo "start LVS of RealServer DR"
/sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce
;;
stop)
/sbin/ifconfig lo:0 down
echo "close LVS of RealServer DR"
echo "0" > /proc/sys/net/ipv4/conf/all/arp_ignore
echo "0" > /proc/sys/net/ipv4/conf/all/arp_announce
;;
*)
echo "Usage : $0 {start|stop}"
exit 1
esac
2. 把這個文件複製到web2主機上.
3. 在web1和web2上分別啓動這個腳本:
/etc/init.d/lvsDR_node start
七、web1和web2主機上開啓httpd服務.
/etc/init.d/httpd start
# ================= TEST =======================================
八、測試是否可以負載均衡.
編寫測試腳本:
#! /bin/sh
for((i=1;i<=100;i++));do
curl http://192.168.96.100:8099 >> /tmp/q;
done
結果:
九、測試斷開一個web服務或加入一個web服務
現在關閉 web2主機(192.168.96.4) 的web 服務..
查看日誌可以看到:
現在再把 web2主機(192.168.96.4)的web 服務加入進來:
查看日誌可以看到:
十、 測試HA
現在模擬主(master)的keepalived主機死掉.
備機的日誌文件:
可以看到備機的keepalived已經開始工作....