分类： LINUX
2013-08-29 16:55:23
原文地址：centos5.3下lvs搭建笔记 作者：purcotton
测试环境
LVS ：192.168.38.240 真实IP
LVS ：192.168.38.241 真实IP （backup）
VIP ：192.168.38.242 虚拟IP（访问地址）
RIP1 :192.168.38.201 负载WEB
RIP2 :192.168.38.9 负载WEB
一、在两台LVS上安装软件：keepalived-1.1.15.tar.gz和ipvsadm-1.24.tar.gz
并执行以下操作
mkdir /usr/local/src/lvs
mv keepalived-1.1.15.tar.gz /usr/local/src/lvs/
mv/usr/local/src/lvs/
cd /usr/local/src/lvs/
lsmod | grep ip_vs#查看是否有ip_lvs模块
uname –r
#查看版本号
ln -s /usr/src/kernels/2.6.18-53.el5-i686 /usr/src/linux
#否则提示一个错误
cd /usr/local/src/lvs/
tar –zxvf ipvsadm-1.24.tar.gz
cd ipvsadm-1.24
make
make install
find -name ipvsadm
find / -name ipvsadm
cd ..
tar -zxvf keepalived-1.1.15.tar.gz
cd keepalived-1.1.15
./configure
#进行编译make
make install
cp /usr/local/etc/rc.d/init.d/ /etc/rc.d/init.d/
cp /usr/local/etc/rc.d/init.d/keepalived /etc/sysconfig/
mkdir /etc/keepalived
cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
cp /usr/local/sbin/keepalived /usr/sbin/
service keepalived start
service keepalived stop
chkconfig --add keepalived
chkconfig keepalived on
创建ipvsadm的启动文件（两台LVS上都创建）
vi /usr/local/sbin/lvsdr.sh
VIP=192.168.38.242
#虚拟IP
RIP1=192.168.38.201
#第一台web备机
RIP2=192.168.38.9
#第二台web备机
/etc/rc.d/init.d/functions
#引用函数库
case "$1" in
start)
echo "stat LVS of DirectorServer"
/sbin/ipvsadm --set 900 120 300
#保持回话
/sbin/ifconfig eth0:1 $VIP broadcast $VIP netmask 255.255.255.0 up
建立eth0:1网卡设定为虚拟IP地址
/sbin/route add -host $VIP dev eth0:1
/sbin/ipvsadm –C
#清除内核虚拟服务器表中的所有记录
/sbin/ipvsadm -A -t $VIP:80 -s wrr
#增加一台新的提供TCP服务的虚拟服务器列表
/sbin/ipvsadm -a -t $VIP:80 -r $RIP1:80 –g
#增加一台提供TCP服务的真实虚拟主机
/sbin/ipvsadm -a -t $VIP:80 -r $RIP2:80 –g
#同上
/sbin/ipvsadm
;;
stop)
echo "Close LVS Directorserver"
/sbin/ifconfig eth0:1 down
#关闭虚拟IP
/sbin/ipvsadm –C
#清除虚拟服务器列表
;;
*)
echo "usage:$0 {start|stop}"
exit 1
esac
chmod 755 /usr/local/sbin/lvsdr.sh
#更改权限
/usr/local/sbin/lvsdr.sh start
#启动服务
#反馈如上采用Route路由直连
Ifconfig
#显示网卡信息
会看到一个eth0:1 ip是刚刚在脚本中出现的192.168.38.242
ipvsadm -L –c
#查看当前进行TCP连接的用户
二、在两台web上执行以下操作
建立脚本
vi /usr/local/sbin/lvsadm.sh
#!/bin/bash
VIP=192.168.38.242
#设定虚拟IP地址
. /etc/rc.d/init.d/functions
#调用函数库
case "$1" in
start)
ifconfig lo:0 $ VIP netmask 255.255.255.255 broadcast $ VIP
##建立eth0:1网卡设定为虚拟IP地址
/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"
#还没看，应该是和路由表有问题
;;
stop)
ifconfig lo:0 down
route del $ VIP >/dev/null 2>&1
#清除路由表中的虚拟IP路由信息
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"
;;
status)
# Status of LVS-DR real server.
islothere=`/sbin/ifconfig lo:0 | grep $ VIP`
isrothere=`netstat -rn | grep "lo:0" | grep $ VIP`
if [ ! "$islothere" -o ! "isrothere" ];then
# Either the route or the lo:0 device
# not found.
echo "LVS-DR real server Stopped."
else
echo "LVS-DR Running."
fi
;;
*)
# Invalid entry.
echo "$0: Usage: $0 {start|status|stop}"
exit 1
;;
esac
exit 0
启动脚本 /usr/local/sbin/lvsadm.sh
Keepalived使用
一、使用Keepalived
/etc/rc.d/init.d/keepalived start
#启动
Vi /etc/Keepalived/Keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
test@test.com
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER
#主LVS为MASTER 备为BACKUP
interface eth0
virtual_router_id 51
priority 100
#备机权重小于100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.38.242
}
}
virtual_server 192.168.38.242 80 {
delay_loop 6
lb_algo wrr
lb_kind DR
nat_mask 255.255.255.0
persistence_timeout 600
protocol TCP
real_server 192.168.38.9 80 {
weight 3
TCP_CHECK {
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.38.6 80 {
weight 3
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
}
}
}
