Lvs（DR）+nginx+tomcat安装配置

１ 部署架构图

LVS DR模式需要将LVS和后端的ＮＧＩＮＸ＋Ｔｏｍｃａｔ部署在同一个局域网内。其架构图如图１所示。

图1 Lvs（DR）+nginx+tomcat部署架构图

２ 准备相关软件包

系统：CentOS 6.3

内核：2.6.32-279.el6.i686

需lvs dr模式（不支持双机热备）需下载如下软件包：

Ø  popt-1.14.tar.gz 

Ø  libnl-devel-1.1-14.el6.i686.rpm

Ø  ipvsadm-1.26.tar.gz

３ 安装LVS

1.    # yum install kernel-devel  #没有内核源码的需安装kernel-devel

2.    #tar zxvf popt-1.14.tar.gz 

3.    # cd popt-1.14

4.    #./configure

5.    # make && make install

6.    # rpm -ivh libnl-devel-1.1-14.el6.i686.rpm

7.    #lsmod |grep ip_vs

8.    #uname -r

9.    2.6.32-279.el6.i686

10.  #ln -s /usr/src/kernels/2.6.32-279.el6.i686/  /usr/src/linux

11.   

12.  #tar zxvf ipvsadm-1.26.tar.gz

13.  #cd ipvsadm-1.26

14.  #make && make install

15.  #find / -name ipvsadm  #查看ipvsadm的位置

16.  /sbin/ipvsadm 17.  /etc/rc.d/init.d/ipvsadm #表明成功安装

４ 配置LVS-DR脚本实现负载均衡

ＮＧＩＮＸ＋Ｔｏｍｃａｔ配置见 Nginx+Tomcat负载均衡部署相关配置。这里只介绍LVS DR模式相关配置。

４.１　DirectorServer端配置

# /usr/local/sbin/lvs-dr.sh
#!/bin/bash
# description: start LVS of DirectorServer
#Written by :http://blog.csdn.net/yydcj/

GW=172.7.4.1
# website director vip.
VIP=172.7.4.201
RIP1=172.7.4.250
 
. /etc/rc.d/init.d/functions
 
logger $0 called with $1
 
case "$1" in
 
start)
    echo " start LVS  of DirectorServer"
           
    # set lvs-vip
    /sbin/ifconfig eth0:0 $VIP broadcast $VIP netmask 255.255.255.255 up
    /sbin/route add -host $VIP dev eth0:0

    #Clear IPVS table
    /sbin/ipvsadm -C

    #set LVS
    /sbin/ipvsadm --set 30 5 60
    /sbin/ipvsadm -A -t $VIP:8080 -s wrr -p 3
    /sbin/ipvsadm -a -t $VIP:8080 -r $RIP1:8080 -g -w 1

    #add status condition
    touch /var/lock/subsys/ipvsadm >/dev/null 2>&1

    echo "ipvsadm is staring!!"
    ;;
        
stop)
    if [ ! -e /var/lock/subsys/ipvsadm ];then
        echo "ipvsadm was stop!!"
        exit 1
    else
        echo "close LVS Directorserver"

	#clean lvs rule
	/sbin/ipvsadm -C
	/sbin/ipvsadm -Z

        #down lvs-vip
	/sbin/route del $VIP
        /sbin/ifconfig eth0:0 down
        #/sbin/ifconfig eth0:1 down        

        #del status condition
        rm -rf /var/lock/subsys/ipvsadm >/dev/null 2>&1
        echo "ipvsadm stoped"
    fi
    ;;
 
status)
 
	if [ ! -e /var/lock/subsys/ipvsadm ];then
		echo "ipvsadm stoped!"
		exit 1
	else
		echo "ipvsadm OK!"
	fi
	;;
 
*)
	echo "Usage: $0 {start|stop|status}"
	exit 1
esac 
exit 0

启动 /usr/local/sbin/lvs-dr.sh start

停止 /usr/local/sbin/lvs-dr.sh stop

４.２ realserver端配置

# /usr/local/sbin/realserver.sh
#!/bin/bash
# description: Config realserver lo and apply noarp 
#Written by :http://blog.csdn.net/yydcj/
SNS_VIP=172.7.4.201
. /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

停止 /usr/local/sbin/realserver.shstop 启动 /usr/local/sbin/realserver.sh start

４.３　查看状态

＃watch ipvsadm –ln　　　＃查看状态