使用LVS Keepalived 實現(xiàn)高性能高可用負(fù)載均衡實際操作說明

1、使用LVS+Keepalived 實現(xiàn)高性能高可用負(fù)載均衡實際操作說明kkmangnn 網(wǎng)站: 前言：本文檔用keepalived實現(xiàn)負(fù)載均衡和高可用性一. 網(wǎng)站負(fù)載均衡拓樸圖.IP信息列表：主機(jī)名IP說明LVS-DR-MasterLVS-DR-BACKUPLVS-DR-VIPWEB1-Realserver0WEB2-RealserverGateWay系統(tǒng)環(huán)境：CentOS 5.2 ，需要安裝有g(shù)cc openssl-devel kernel-devel包 二.

2、安裝LVS和Keepalvied軟件包1. 下載相關(guān)軟件包#mkdir /usr/local/src/lvs#cd /usr/local/src/lvs#wget /software/kernel-2.6/ipvsadm-1.24.tar.gz#wget /software/keepalived-1.1.15.tar.gz2. 安裝LVS和Keepalived#lsmod |grep ip_vs#uname -r2.6.18-92.el5#ln -s /usr/src/kernels

3、/2.6.18-92.el5-i686/ /usr/src/linux#tar zxvf ipvsadm-1.24.tar.gz#cd ipvsadm-1.24#make & make install#tar zxvf keepalived-1.1.15.tar.gz#cd keepalived-1.1.15#./configure & make & make install把keepalived做成系統(tǒng)啟動服務(wù)方便管理#cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/#cp /usr/local/etc/sysconfig/

4、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|stop 三 配置web服務(wù)器的腳本.#vi /usr/local/src/lvs/web.sh#!/bin/bashSNS_VIP=case $1 instartifconfig lo:0 $SNS_VIP netmask

5、 55 broadcast $SNS_VIP/sbin/route add -host $SNS_VIP dev lo:0echo 1 /proc/sys/net/ipv4/conf/lo/arp_ignoreecho 2 /proc/sys/net/ipv4/conf/lo/arp_announceecho 1 /proc/sys/net/ipv4/conf/all/arp_ignoreecho 2 /proc/sys/net/ipv4/conf/all/arp_announcesysctl -p /dev/null 2$1echo RealServer Start

6、 OK;stopifconfig lo:0 downroute del $SNS_VIP /dev/null 2&1echo 0 /proc/sys/net/ipv4/conf/lo/arp_ignoreecho 0 /proc/sys/net/ipv4/conf/lo/arp_announceecho 0 /proc/sys/net/ipv4/conf/all/arp_ignoreecho 0 /proc/sys/net/ipv4/conf/all/arp_announceecho RealServer Stoped;*echo Usage: $0 start|stopexit 1esace

7、xit 0 # chmod +x /usr/local/src/lvs/web.sh #修改成可執(zhí)行#vi /etc/rc.local #將該腳本寫入開機(jī)文件/usr/local/src/lvs/web.sh start配置好一臺web服務(wù)器之后，將配置文件拷貝到第二臺服務(wù)器。 四使用Keepalvied實現(xiàn)負(fù)載均衡和和高可用性1.配置在主負(fù)載均衡服務(wù)器上配置keepalived.conf#vi /etc/keepalived/keepalived.conf! Configuration File for keepalivedglobal_defs # notification_email #

8、 acassenfirewall.loc# failoverfirewall.loc# sysadminfirewall.loc# # notification_email_from Alexandre.Cassenfirewall.loc# smtp_server # smtp_connect_timeout 30router_id LVS_DEVEL#2009-08-24 by pricet#VIP1vrrp_instance VI_1 state MASTER #在備用機(jī)dr2上配置成BACKUPinterface eth0virtual_router_id 5

9、1priority 100 #在備用機(jī)dr1上配置成99advert_int 1authentication auth_type PASSauth_pass 1111virtual_ipaddress virtual_server 80 delay_loop 6lb_algo wrrlb_kind DRpersistence_timeout 50protocol TCPreal_server 80 weight 1TCP_CHECK connect_timeout 3nb_get_retry 3delay_before_re

10、try 3connect_port 80real_server 0 80 weight 3TCP_CHECK connect_timeout 3nb_get_retry 3delay_before_retry 3connect_port 802. BACKUP服務(wù)器同上配置，先安裝lvs再按裝keepalived,仍后配置/etc/keepalived/keepalived.conf，只需將紅色標(biāo)示的部分改一下即可.3. 啟動keepalived，查看lvs服務(wù)是否正常#watch ipvsadm lnrootdr1 keepalived-1.1.15# ipvsadmIP Virtual Server version 1.2.1 (size=4096Prot LocalAddress:Port Scheduler Flags- RemoteAddress:Port Forward Weight ActiveConn InActConnTCP 192.168.0