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  • LVS DR 负载均衡集群

    LVS DR 负载均衡集群

    试验准备:五台主机ABCDE,主机ABCDE均为单网卡,IP地址分别为192.168.10.2,192.168.10.3,192.168.10.4,192.168.10.5,192.168.10.6。主机A作为内网客户端,主机B负载均衡调度器,主机C和主机D作为网站服务器,主机E作为共享存储,均清除防火墙和SELINUX。操作系统均为RHELx86_64,为最小化安装。

    1. 主机A操作

    #vim /etc/sysconfig/network-scripts/ifcfg-eth0

    #service network restart

    1. 主机B操作

    #vim /etc/sysconfig/network-scripts/ifcfg-eth0

    #cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0:0

    #service network restart

    #vim /etc/sysctl.conf

    net.ipv4.conf.all.send_redirects=0

    net.ipv4.conf.default.send_redirects=0

    net.ipv4.conf.eth0.send_redirects=0

    #sysctl –p

    #modprobe ip_vs

    #cat /proc/net/ip_vs

    #cd /mnt/cdrom/Packets

    #rpm –ivh ipvsadm-1.25-10.el6.x86_64.rpm

    #service ipvsadm stop #这个命令会清除原来设定的规则

    #ipvsadm –A –t 192.168.10.10:80 –s rr

    #ipvsadm –a –t 192.168.10.10:80 –r 192.168.10.4:80 –g

    #ipvsadm –a –t 192.168.10.10:80 –r 192.168.10.5:80 –g

    #service ipvsadm save

    1. 主机E操作

    #vim /etc/sysconfig/network-scripts/ifcfg-eth0

    #service network restart

    #rpm –qa | grep nfs

    #vim /etc/exports

    #mkdir /share

    #cd /share

    #vim index.html

    www.taobao.com

    #service rpcbind start

    注:RHEL6之后,portmap的启动方式改了,必须启动,否则nfs会报错

    #servie nfs start

    #chkconfig rpcbind on

    #chkcofig nfs on

    #yum -y install showmount #安装showmount命令

    #showmount –e 192.168.10.6

    #exportfs –rv

    1. 主机C操作

    #yum –y install httpd

    #service httpd start

    #chkconfig httpd on

    #yum –y install showmount

    #showmount –e 192.168.10.6

    #mount 192.168.10.6:/share /var/www/html

    #curl 192.168.10.4

    #vim /etc/sysconfig/network-scripts/ifcfg-eth0

    #cp /etc/sysconfig/network-scripts/ifcfg-lo /etc/sysconfig/network-scripts/ifcfg-lo:0

    #vim /etc/sysconfig/network-scripts/ifcfg-lo:0

    #vim /etc/sysctl.conf

    net.ipv4.conf.all.arp_ignore=1

    net.ipv4.conf.all.arp_announce=2

    net.ipv4.conf.default.arp_ignore=1

    net.ipv4.conf.default.arp_announce=2

    net.ipv4.conf.lo.arp_ignore=1

    net.ipv4.conf.lo.arp_announce=2

    #route add –host 192.168.10.10 dev lo:0

    #vim /etc/rc.d/rc.local

    /sbin/route add –host 192.168.10.10 dev lo:0

    1. 主机D操作

    #yum –y install httpd

    #service httpd start

    #chkconfig httpd on

    #yum –y install showmount

    #showmount –e 192.168.10.6

    #vim /var/www/html/index.html #为了便于下面的测试,所以用不同网页

    www.baidu.com

    #vim /etc/sysconfig/network-scripts/ifcfg-eth0

    #cp /etc/sysconfig/network-scripts/ifcfg-lo /etc/sysconfig/network-scripts/ifcfg-lo:0

    #vim /etc/sysconfig/network-scripts/ifcfg-lo:0

    #vim /etc/sysctl.conf

    net.ipv4.conf.all.arp_ignore=1

    net.ipv4.conf.all.arp_announce=2

    net.ipv4.conf.default.arp_ignore=1

    net.ipv4.conf.default.arp_announce=2

    net.ipv4.conf.lo.arp_ignore=1

    net.ipv4.conf.lo.arp_announce=2

    #route add –host 192.168.10.10 dev lo:0

    #vim /etc/rc.d/rc.local

    /sbin/route add –host 192.168.10.10 dev lo:0

    #ipvsadm –Ln

    主机B操作:

    1. 测试

    在浏览器输入curl 192.168.10.10

    可以知道主机C和主机D交互出现。

    1. LVS+keeplived实现服务器的高可用
    1. keepalived概述

      为LVS和HA设计的一款健康状态工具;

      支持故障自动切换(Failover);

      支持节点健康状态检查(Health Checking);

    2. keepalived的热备方式

      VRRP(Virtual Router Redundancy Protocol,虚拟路由冗余协议)--主+多备,共用同一个IP地址,但优先级不同。

    3. lvs+keepalived

      负载均衡+高可用集群,针对Lvs调度器实现双机热备,能够管理服务器池,自动隔离失效节点

    4.实现LVS+keepalived实现高可用集群

    试验在上面试验的基础上,在加上一台服务器作为从调度器,IP地址为192.168.10.7

    1. 配置从调度器安装ipvs

    #vim /etc/sysconfig/network-scripts/ifcfg-eth0

    #cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0:0

    #/etc/sysconfig/network-scripts/ifcfg-eth0:0

    如果这个时候启动会出现如下问题

    解决方法:

    #vim /etc/sysconfig/network-scripts/ifup-eth

    243-246这几行注释掉

    主调度器也要做上面的操作,然后启动eth0:0

    #ifup eth0

    #ifup eth0:0

    #vim /etc/sysctl.conf

    net.ipv4.conf.all.send_redirects=0

    net.ipv4.conf.default.send_redirects=0

    net.ipv4.conf.eth0.send_redirects=0

    #sysctl –p

    #modprobe ip_vs

    #cat /proc/net/ip_vs

    #cd /mnt/cdrom/Packets

    #rpm –ivh ipvsadm-1.25-10.el6.x86_64.rpm

    #service ipvsadm stop #这个命令会清楚原来设定的规则

    #ipvsadm –A –t 192.168.10.10:80 –s rr

    #ipvsadm –a –t 192.168.10.10:80 –r 192.168.10.4:80 –g

    #ipvsadm –a –t 192.168.10.10:80 –r 192.168.10.5:80 –g

    #service ipvsadm save

    1. 主调度器安装keepalived

    #yum –y intall kernel-devel openssl-devel popt-devel

    #tar xf keepalived-1.2.2.tar.gz

    #cd keepalived-1.2.2

    #./configure –prefix=/ –with-kernel-dir=/usr/sr/kernels/2.6.32-358.el6.x86_64/

    #make && make install

    #vim /etc/keepalived/keepalived.conf

    #service keepalived start

    #chkconfig –add keepalived

    #chkconfig keepalived on

    #vim /etc/sysconfig/network-scripts/ifup-eth

    243-246这几行注释掉

    #ifup eth0

    #ifup eth0:0

    1. 从调度器安装keepalived

    #yum –y intall kernel-devel openssl-devel popt-devel

    #tar xf keepalived-1.2.2.tar.gz

    #cd keepalived-1.2.2

    #./configure –prefix=/ –with-kernel-dir=/usr/sr/kernels/2.6.32-358.el6.x86_64/

    #make && make install

    #vim /etc/keepalived/keepalived.conf

    #service keepalived start

    #chkconfig –add keepalived

    #chkconfig keepalived on

    5.测试是否可以高可用

    ①从主机A看一下负载的效果

    ②把主调度器的eth0 down

    #ifdown eth0

    从主机A查看效果

    网站仍然可以访问

    1. 把从调度器的eth0 down掉

    #ifdown eth0

    在访问网站

    启动主调度器的eth0网卡

    #ifup eth0

    又可以访问了

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  • 原文地址:https://www.cnblogs.com/fengyutech/p/4967489.html
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