LVS+keepalived 实现高可用与负载均衡实施方案

tilac 发表于 2013-7-31 09:34:13

LVS+keepalived 实现高可用与负载均衡实施方案<Alvin-zeng:孤独0-1>目录一、安装LVS11.1、环境IP描述：11.2、所需软件21.3、安装步骤主备操作21.4、配置主备LVS启动脚本2二、安装Keepalived42.1、所需软件42.2、安装步骤42.3、修改主keepalived配置文件52.4、修改从keepalived配置文件6三、配置WEB服务器脚本73.1、配置sysctl文件73.2、脚本内容显示如下：8四、测试94.1、WEB条件94.2、按以上配置无误9

一、安装LVS1.1、环境IP描述：LVS-DR-Master       192.168.1.3LVS-DR-herbat          192.168.2.1
LVS-DR-BACKUP       192.168.1.4LVS-DR-herbat          192.168.2.2
LVS-DR-VIP          192.168.1.254
WEB1-Realserver    192.168.1.5
WEB2-Realserver    192.168.1.6
GateWay             192.168.1.1
注意：所有集群服务器时间要一致1.2、所需软件http://2999835.blog./e/u/themes/default/images/spacer.gif1.3、安装步骤主备操作注意此步，否则编译回出错，#: ln -s /usr/src/kernels/2.6.18-194.el5-i686//usr/src/linux #:tar –zxvf ipvsadm-1.24.tar.gz#:make && make install#find / -name ipvsadm

1.4、配置主备LVS启动脚本#脚本文件,http://2999835.blog./e/u/themes/default/images/spacer.gif#:然后将此脚本拷贝到主备的/etc/init.d/下面加上权限 chmod 755 /etc/inint.d/lvs-dr.sh#:ipvsadm –L 查看规则#:watch ipvsadm –ln 查实时规则变化#:vi lvs-dr.sh             #:只需修改红色区域#!/bin/bash#description: start LVS of DirectorServer#Written by :NetSeek #http://www.linuxtone.orgGW="192.168.1.1"# website director vip.WEB_VIP="192.168.1.254"WEB_RIP1="192.168.1.5"WEB_RIP2="192.168.1.6". /etc/rc.d/init.d/functions
logger $0 called with $1
case "$1" in
start)    # Clear all iptables rules.    /sbin/iptables -F    # Reset iptables counters.    /sbin/iptables -Z    # Clear all ipvsadm rules/services.    /sbin/ipvsadm -C
#set lvs vip for dr    /sbin/ipvsadm --set 30 5 60    /sbin/ifconfig eth0:0 $WEB_VIP broadcast $WEB_VIP netmask 255.255.255.255 up    /sbin/route add -host $WEB_VIP dev eth0:0    /sbin/ipvsadm -A -t $WEB_VIP:80 -s rr    /sbin/ipvsadm -a -t $WEB_VIP:80 -r $WEB_RIP1:80 -g -w 1    /sbin/ipvsadm -a -t $WEB_VIP:80 -r $WEB_RIP2:80 -g -w 1    touch /var/lock/subsys/ipvsadm >/dev/null 2>&1
   # set Arp    /sbin/arping -I eth0 -c 5 -s $WEB_VIP $GW >/dev/null 2>&1    ;;stop)    /sbin/ipvsadm -C    /sbin/ipvsadm -Z    ifconfig eth0:0 down    route del $WEB_VIP>/dev/null 2>&1    rm -rf /var/lock/subsys/ipvsadm >/dev/null 2>&1    /sbin/arping -I eth0 -c 5 -s $WEB_VIP $GW    echo "ipvsadm stoped"    ;;
status)
   if [ ! -e /var/lock/subsys/ipvsadm ];then             echo "ipvsadm is stoped"             exit 1    else             ipvsadm -ln             echo "..........ipvsadm is OK."    fi    ;;
*)    echo "Usage: $0 {start|stop|status}"    exit 1;;esacexit 0

二、安装Keepalived2.1、所需软件http://2999835.blog./e/u/themes/default/images/spacer.gif2.2、安装步骤#:tar –zxvfkeepalived-1.1.20.tar.gz#:cd keepalvied-1.1.20#./concfigure-- -- prefix=/usr/local/keepalived#: make && make install#cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/# cp /usr/local/keepalived/etc/sysconfig/keepalived/etc/sysconfig/#:mkdir /etc/keepalived#cpusr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/#cp /usr/local/keepalived/sbin/keepalived /usr/sbin/2.3、修改主keepalived配置文件http://2999835.blog./e/u/themes/default/images/spacer.gif1：主服务器配置文件内容
#：vi /etc/keepalived/keepalived.conf
! Configuration File for keepalivedglobal_defs { router_id LVS_DEVELKeepAlive = false       记加上此段，否则每次在第一次访问的时候，会提示找不到也面，只有刷新一下，才好}vrrp_instance VI_1 { state MASTER #主服务器为MASTER interface eth1 #检测心跳网口virtual_router_id 51 #ID值主备要保持一致 priority 100       #:优先级值越大，成为主服务器的优先级就越高 advert_int 1       #:广播周期秒数 authentication {    auth_type PASS    auth_pass 1111 } virtual_ipaddress {192.168.1.254 #:虚拟VIP地址 }}

virtual_server 192.168.1.254 80 { #:虚拟VIP地址与端口 delay_loop 6 lb_algo rr             #:调度算法为RR轮询 lb_kind DR             #:体系架构为 DR架构persistence_timeout 0    #:同一IP 50秒内的请求都发到同个real server protocol TCP
real_server 192.168.1.5 80 { #:真实WEB服务器地址与端口    weight 3             #：转发伐值，越高调用的越多    TCP_CHECK {    connect_timeout 10 #：连接超时为10秒    nb_get_retry 3    delay_before_retry 3    connect_port 80} } real_server 192.168.1.6 80 {    weight 3    TCP_CHECK {    connect_timeout 10    nb_get_retry 3    delay_before_retry 3    connect_port 80    } }}
2.4、修改从keepalived配置文件
http://2999835.blog./e/u/themes/default/images/spacer.gif1：从务器配置文件内容#：vi /etc/keepalived/keepalived.conf
! Configuration File for keepalivedglobal_defs { router_id LVS_DEVEL}vrrp_instance VI_1 { state BACKUP    #:从服务器为BACKUP interface eth1       #检测心跳网口virtual_router_id 51 #ID值主备要保持一致 priority 99       #:优先级值越大，成为主服务器的优先级就越高，从为99值 advert_int 1       #:广播周期秒数 authentication {    auth_type PASS    auth_pass 1111 } virtual_ipaddress {192.168.1.254 #:虚拟VIP地址 }}

virtual_server 192.168.1.254 80 { #:虚拟VIP地址与端口 delay_loop 6 lb_algo rr             #:调度算法为RR轮询 lb_kind DR             #:体系架构为 DR架构persistence_timeout 0    #:同一IP 50秒内的请求都发到同个real server protocol TCP
real_server 192.168.1.5 80 { #:真实WEB服务器地址与端口    weight 3             #：转发伐值，越高调用的越多    TCP_CHECK {    connect_timeout 10 #：连接超时为10秒    nb_get_retry 3    delay_before_retry 3    connect_port 80} } real_server 192.168.1.6 80 {    weight 3    TCP_CHECK {    connect_timeout 10    nb_get_retry 3    delay_before_retry 3    connect_port 80    } }}
三、配置WEB服务器脚本http://2999835.blog./e/u/themes/default/images/spacer.gif3.1、配置sysctl文件#:vi /etc/sysctl.confnet.ipv4.conf.lo.arp_ignore = 1
net.ipv4.conf.lo.arp_announce = 2
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2#:sysctl –p 生效
3.2、脚本内容显示如下：#!/bin/bash# Written by NetSeek # description: Config realserver lo and apply noarp WEB_VIP="192.168.1.254"    #:修改VIP，其它的地方不动，
. /etc/rc.d/init.d/functions
case "$1" instart)    ifconfig lo:0 $WEB_VIP netmask 255.255.255.255 broadcast $WEB_VIP    /sbin/route add -host $WEB_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 $WEB_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"    ;;status)    # Status of LVS-DR real server.    islothere=`/sbin/ifconfig lo:0 | grep $WEB_VIP`    isrothere=`netstat -rn | grep "lo:0" | grep $web_VIP`    if [ ! "$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;;esacexit 0四、测试4.1、WEB条件WEB服务器能通过内网正常访问，然后在两台WB服务器启动relser.sh 脚本#:/etc/init.d/relserstart4.2、按以上配置无误在主服务器上启动lvs-dr.sh 脚本#:/etc/init.d/lvs-dr    start#:ipvsadm –L       查看策略是否生效，正常之后，将 /etc/init.d/lvs-dr stop关闭掉IP Virtual Server version 1.2.1 (size=4096)Prot LocalAddress:Port Scheduler Flags-> RemoteAddress:Port       Forward Weight ActiveConn InActConnTCP192.168.1.254:http rr-> 192.168.1.6:http          Route 3    0       0       -> 192.168.1.5:http          Route 3    0       0 在主服务与备服务器启动keepalived 脚本#:etc/init.d/lvs-dr stop将LVS脚本关闭掉#: /etc/init.d/keepalived start#/etc/init.d/keepalived start启动keepalived 服务，keepalived就能利用keepalived.conf 配置文件，实现负载均衡和高可用.#:ipvsadm –L       查看keepalvied 是否在停止lvs-dr.sh 脚本后，重新加载策略，最后：停Master服务器的keepalived服务，查看BAKCUP服务器是否能正常接管服务。#:watch ipvsadm 查看连接时时状态

懂ni 发表于 2013-8-1 08:08:04

勃起不是万能的，但不能勃起却是万万都不能的!

cyc1111 发表于 2013-8-1 22:42:42

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qazxsw1 发表于 2013-8-2 09:58:59

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想你了的他他 发表于 2013-8-3 01:25:07

精典之极就是精斑!!!

kaiser_cn 发表于 2013-8-3 08:01:57

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loyalxuan 发表于 2013-8-3 18:38:32

月经不仅仅是女人的痛苦，也是男人的痛苦。

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LVS+keepalived 实现高可用与负载均衡实施方案