生产环境中CentOS5.6下配置LVS
公司内网的一个项目开发那边自己配置的LVS，出了点问题，我重装配置了，济南和东莞各一套，东莞我用的是LVS-HA，济南我用的是LVS+keepalived，下面是具体步骤：一、环境
东莞
VIP：172.28.29.71
realserver1:172.28.29.39(BACKUP)
realserver2:172.28.29.40(MASTER)
realserver3:172.28.29.41
济南
VIP：162.28.29.75
realserver1:162.28.29.38(MASTER)
realserver2:162.28.29.39(BACKUP)
realserver3:162.28.29.40
二、部署
A、东莞
1.安装需要的包（MASTER、BACKUP都安装安装）
yum -y install ipvsadm modcluster piranha system-config-cluster
2.撰写lvs.cfg配置文件（MASTER、BACKUP的内容是一样的）
# vi /etc/sysconfig/ha/lvs.cf
serial_no = 18
primary = 172.28.29.40
service = lvs
backup_active = 1
backup = 172.28.29.39
heartbeat = 1
heartbeat_port = 539
keepalive = 6
deadtime = 18
network = direct
debug_level = NONE
monitor_links = 0
syncdaemon = 0
virtual 172.28.29.71 {
active = 1
address = 172.28.29.71 eth0:1
vip_nmask = 255.255.255.0
port = 81
send = "GET / HTTP/1.0\r\n\r\n"
expect = "HTTP"
use_regex = 0
load_monitor = none
scheduler = wrr
protocol = tcp
timeout = 6
reentry = 15
quiesce_server = 0
server 172.28.29.39 {
address = 172.28.29.39
active = 1
port = 81
weight = 1
}
server 172.28.29.40 {
address = 172.28.29.40
active = 1
weight = 1
port = 81
}
server 172.28.29.41 {
address = 172.28.29.41
active = 1
port = 81
weight = 1
}
}
3.撰写realserver的脚本（三台realserver都需要）
vi /etc/init.d/lvs-realserver.sh
#/bin/bash
VIP=172.28.29.71
start(){
/sbin/ifconfig eth0:1 ${VIP} broadcast ${VIP} netmask 255.255.255.0 up
/sbin/route add -host ${VIP} dev eth0:1
/sbin/sysctl -w net.ipv4.conf.lo.arp_ignore=1
/sbin/sysctl -w net.ipv4.conf.lo.arp_announce=2
/sbin/sysctl -w net.ipv4.conf.all.arp_ignore=1
/sbin/sysctl -w net.ipv4.conf.all.arp_announce=2
/sbin/sysctl -p
}
stop(){
/sbin/ifconfig eth0:1 down
/sbin/sysctl -w net.ipv4.conf.lo.arp_ignore=0
/sbin/sysctl -w net.ipv4.conf.lo.arp_announce=0
/sbin/sysctl -w net.ipv4.conf.all.arp_ignore=0
/sbin/sysctl -w net.ipv4.conf.all.arp_announce=0
}
restart(){
stop
start
}
case $1 in
start)
start
;;
stop)
stop
;;
restart)
restart
;;
status)
/sbin/ifconfig
;;
*)
echo "Usage: $0 {start|stop|restart|status}"
exit 1
esac
4.添加执行权限并启动realserver的脚本，加人开机启动（三台都需要）
# chmod +x/etc/init.d/lvs-realserver.sh
# sh /etc/init.d/lvs-realserver.sh
# echo "sh /etc/init.d/lvs-realserver.sh" >> /etc/rc.local
5.打开内核的路由转发功能（MASTER和BACKUP)
# vi /etc/sysctl.conf
把net.ipv4.ip_forward = 0 给为 1
执行一下： sysctl -p
6.启动LVS集群（先MASTER.后BACKUP)
/etc/init.d/pulse start
7.查看运行情况
# ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP172.28.29.71:hosts2-ns wrr
-> 172.28.29.41:hosts2-ns Route 1 15410 1
-> 172.28.29.39:hosts2-ns Route 1 15476 1
-> 172.28.29.40:hosts2-ns Local 1 2 2231
B、济南
1. 安装需要的包（MASTER、BACKUP)
yum -y install ipvsadm
2.安装keepalived （MASTER、BACKUP)
# ln -sv /usr/src/kernels/2.6.18-194.el5-x86_64/ /usr/src/linux/
# wget http://www.keepalived.org/software/keepalived-1.1.17.tar.gz
# tar -zxvf keepalived-1.1.17.tar.gz
# cd keepalived-1.1.17
# ./configure
# make&&make install
。。。。。。
Keepalived configuration
------------------------
Keepalived version : 1.1.17
Compiler : gcc
Compiler flags : -g -O2
Extra Lib : -lpopt -lssl -lcrypto
Use IPVS Framework : Yes
IPVS sync daemon support : Yes
Use VRRP Framework : Yes
Use LinkWatch : No
Use Debug flags : No
# cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
# cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
# cp /usr/local/sbin/keepalived /usr/sbin/
# mkdir /etc/keepalived
vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
navyaijm@163.com
}
notification_email_from navyaijm@163.com
smtp_server smtp.163.com
# smtp_connect_timeout 30
router_id LVS_DEVEL
}
# VIP1
vrrp_instance VI_1 {
state MASTER 备为：BACKUP
interface eth0
lvs_sync_daemon_inteface eth0
virtual_router_id 51
priority 100 备为：90
advert_int 5
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
162.28.29.75
}
}
virtual_server 162.28.29.75 81 {
delay_loop 6
lb_algo rr
lb_kind DR
persistence_timeout 60
protocol TCP
real_server 162.28.29.38 81 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 81
}
}
real_server 162.28.29.39 81 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 81
}
}
real_server 162.28.29.40 81 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 81
}
}
}
3.撰写realserver脚本（三台一样）
# vi /etc/init.d/lvs-realserver.sh
#/bin/bash
VIP=162.28.29.75
start(){
/sbin/ifconfig eth0:1 ${VIP} broadcast ${VIP} netmask 255.255.255.0 up
/sbin/route add -host ${VIP} dev eth0:1
/sbin/sysctl -w net.ipv4.conf.lo.arp_ignore=1
/sbin/sysctl -w net.ipv4.conf.lo.arp_announce=2
/sbin/sysctl -w net.ipv4.conf.all.arp_ignore=1
/sbin/sysctl -w net.ipv4.conf.all.arp_announce=2
/sbin/sysctl -p
}
stop(){
/sbin/ifconfig eth0:1 down
/sbin/sysctl -w net.ipv4.conf.lo.arp_ignore=0
/sbin/sysctl -w net.ipv4.conf.lo.arp_announce=0
/sbin/sysctl -w net.ipv4.conf.all.arp_ignore=0
/sbin/sysctl -w net.ipv4.conf.all.arp_announce=0
}
restart(){
stop
start
}
case $1 in
start)
start
;;
stop)
stop
;;
restart)
restart
;;
status)
/sbin/ifconfig
;;
*)
echo "Usage: $0 {start|stop|restart|status}"
exit 1
esac
4.添加执行权限并启动realserver的脚本，加人开机启动（三台都需要）
# chmod +x/etc/init.d/lvs-realserver.sh
# sh /etc/init.d/lvs-realserver.sh
# echo "sh /etc/init.d/lvs-realserver.sh" >> /etc/rc.local
5.打开内核的路由转发功能（MASTER和BACKUP)
# vi /etc/sysctl.conf
把net.ipv4.ip_forward = 0 给为 1
执行一下： sysctl -p
6.启动LVS集群（先MASTER.后BACKUP)
# /etc/init.d/keepalived start
7.查看运行情况
# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP162.28.29.75:81 rr persistent 60
-> 162.28.29.40:81 Route 100 1961 0
-> 162.28.29.39:81 Route 100 1648 1
-> 162.28.29.38:81 Local 100 0 227
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