基于redhat linux虚拟服务器的web负载均衡集群（piranha+LVS）

ainila

基于redhat linux虚拟服务器的web负载均衡集群
硬件环境
分发机
LB1：192.168.0.129
LB2：192.168.0.130
真实节点主机
NODE1:192.168.0.131
NODE2:192.168.0.132
试验在VMWARE下完成测试成功

初始化配置
在LB1上编辑hosts文件，并且设置 root ssh key 这样有利于节点之间相互访问

• [root@localhost ha]# cat /etc/hosts
  
• 
  
• # Do not remove the following line, or various programs
  
• 
  
• # that require network functionality will fail.
  
• 
  
• 127.0.0.1          localhost.localdomain localhost
  
• 
  
• ::1              localhost6.localdomain6 localhost6
  
• 
  
• 192.168.0.129 lb1.test.com lb1
  
• 
  
• 192.168.0.130 lb2.test.com lb2
  
• 
  
• 192.168.0.131 node1.test.com node1
  
• 
  
• 192.168.0.132 node2.test.com node2
  

• [root@localhost ha]# ssh-keygen
  
• 
  
• Generating public/private rsa key pair.
  
• 
  
• Enter file in which to save the key (/root/.ssh/id_rsa):
  
• 
  
• /root/.ssh/id_rsa already exists.
  
• 
  
• Overwrite (y/n)?
  
• 
  
• [root@localhost ha]#
  

将LB1的/root/.ssh和/etc/hosts复制到其他节点中

• For hostname in lb2 node1 node2 ; do scp –r /root/.ssh $hostname:/root ;done
  
• 
  
• For hostname in lb2 node1 node2 ; do scp /etc/hosts $hostname:/etc/hosts ;done
  

在LB1上安装ipvasdm piranha httpd 软件包

• yum install -y ipvsadm piranha httpd
  
• 
  
• Loaded plugins: fastestmirror
  
• 
  
• Loading mirror speeds from cached hostfile
  
• 
  
• Setting up Install Process
  
• 
  
• Package ipvsadm-1.24-10.x86_64 already installed and latest version
  
• 
  
• Package piranha-0.8.4-16.el5.x86_64 already installed and latest version
  
• 
  
• Package httpd-2.2.3-43.el5.centos.x86_64 already installed and latest version
  
• 
  
• Nothing to do
  

再LB2上安装ipvasdm piranha 包！

• yum install -y ipvsadm piranha
  
• 
  
• Loaded plugins: fastestmirror
  
• 
  
• Loading mirror speeds from cached hostfile
  
• 
  
• Setting up Install Process
  
• 
  
• Package ipvsadm-1.24-10.x86_64 already installed and latest version
  
• 
  
• Package piranha-0.8.4-16.el5.x86_64 already installed and latest version
  
• 
  
• Nothing to do
  

在node1 node2上安装httpd arptables_jf

• [root@localhost ~]# yum install httpd arptables_jf
  
• 
  
• Loaded plugins: fastestmirror
  
• 
  
• Loading mirror speeds from cached hostfile
  
• 
  
• Setting up Install Process
  
• 
  
• Package httpd-2.2.3-43.el5.centos.x86_64 already installed and latest version
  
• 
  
• Package arptables_jf-0.0.8-8.x86_64 already installed and latest version
  
• 
  
• Nothing to do
  

[root@localhost ~]#
登陆 LB1 配置piranha登陆设置密码

• [root@localhost ha]# piranha-passwd
  
• 
  
• New Password:
  
• 
  
• Verify:
  
• 
  
• Updating password for user piranha
  

启动piranha-gui服务

• [root@localhost ha]# /etc/init.d/piranha-gui start
  

Starting piranha-gui:                                      [确定]
[root@localhost ha]#
浏览器中打开http://192.168.0.129:3636，输入用户名密码登陆！

设置primary server public ip 192.168.0.129 点击accept生效

选择REDUNDANCY 然后点击ENABLE，设置Redundant server public ip 为192.168.0.130，单击accept

选择VIRTUAL SERVERS 然后点击ADD

编辑VIRTUAL SERVER编辑，如图！

添加，编辑REAL SERVER 为两个真实节点，编辑完后别忘了，保持，并且active

选择MONITORING SCRIPTS , 将sending Program设为/bin/testlinks %h ,将

Expect 设置 ok 。点击ACCEPT保存。点击VIRTUAL SERVERS回到上级菜单

点击ACTIVETE激活！

最后回到CONTROL/MONITORING点击update information now 更新
配置文件保存在/etc/sysconfig/ha/lvs.cf

• [root@localhost ha]# cat /etc/sysconfig/ha/lvs.cf
  
• 
  
• serial_no = 58
  
• 
  
• primary = 192.168.0.129
  
• 
  
• service = lvs
  
• 
  
• backup_active = 1
  
• 
  
• backup = 192.168.0.130
  
• 
  
• heartbeat = 1
  
• 
  
• heartbeat_port = 539
  
• 
  
• keepalive = 6
  
• 
  
• deadtime = 18
  
• 
  
• network = direct
  
• 
  
• debug_level = NONE
  
• 
  
• monitor_links = 0
  
• 
  
• syncdaemon = 0
  
• 
  
• virtual apache {
  
• 
  
•      active = 1
  
• 
  
•      address = 192.168.0.250 eth0:1
  
• 
  
•      vip_nmask = 255.255.255.255
  
• 
  
•      port = 80
  
• 
  
•      send = "GET / HTTP/1.0\r\n\r\n"
  
• 
  
•      expect = "ok"
  
• 
  
•      use_regex = 0
  
• 
  
•      send_program = "/bin/testlinks %h"
  
• 
  
•      load_monitor = none
  
• 
  
•      scheduler = wlc
  
• 
  
•      protocol = tcp
  
• 
  
•      timeout = 6
  
• 
  
•      reentry = 15
  
• 
  
•      quiesce_server = 0
  
• 
  
•      server node1 {
  
• 
  
•          address = 192.168.0.131
  
• 
  
•          active = 1
  
• 
  
•          weight = 1
  
• 
  
•      }
  
• 
  
•      server node2 {
  
• 
  
•          address = 192.168.0.132
  
• 
  
•          active = 1
  
• 
  
•          weight = 1
  
• 
  
•      }
  
• 
  
• }
  
• 
  
• [root@localhost ha]#
  

将这个文件cp到LB2上！

• [root@localhost ha]# scp  /etc/sysconfig/ha/lvs.cf lb2:/etc/sysconfig/ha/lvs.cf
  

在LB1上编辑服务器测试程序/bin/testlink，并且加上执行权限！
                                                                                

• [root@localhost ha]# cat /bin/testlink
  
• 
  
• #!/bin/bash
  
• 
  
• /usr/bin/links -dump 1 $1 >/dev/null 2>&1
  
• 
  
• if [ 0 -eq $? ] ; then
  
• 
  
• echo ok
  
• 
  
• else
  
• 
  
• echo fail
  
• 
  
• fi
  
• 
  
• [root@localhost ha]#chmod a+x /bin/testlink  
  

然后讲、bin/testlink文件复制一份到LB2上！

在node1上编辑arptables脚本，并且运行它

• [root@localhost ~]# cat /arp_arptables.sh
  
• 
  
• #!/bin/bash
  
• 
  
• VIP=192.168.0.250
  
• 
  
• RIP=192.168.0.131
  
• 
  
• arptables -F
  
• 
  
• arptables -A IN -d $VIP -j DROP
  
• 
  
• arptables -A OUT -s $VIP -j mangle --mangle-ip-s $RIP
  
• 
  
• /sbin/ifconfig eth0:1 $VIP broadcast $VIP netmask 255.255.255.255 up
  
• 
  
• /sbin/route add -host $VIP dev eth0:1
  
• 
  
• [root@localhost ~]#
  

放入测试页面，并且启动httpd

• [root@localhost ~]# echo "node1" > /var/www/html/index.html
  
• 
  
• [root@localhost ~]# service httpd start
  

启动 httpd：


在node2上编辑arptables脚本，并且运行它

• [root@localhost ~]# cat /arp_arptables.sh
  
• 
  
• #!/bin/bash
  
• 
  
• VIP=192.168.0.250
  
• 
  
• RIP=192.168.0.132
  
• 
  
• arptables -F
  
• 
  
• arptables -A IN -d $VIP -j DROP
  
• 
  
• arptables -A OUT -s $VIP -j mangle --mangle-ip-s $RIP
  
• 
  
• /sbin/ifconfig eth0:1 $VIP broadcast $VIP netmask 255.255.255.255 up
  
• 
  
• /sbin/route add -host $VIP dev eth0:1
  
• 
  
• [root@localhost ~]#
  

放入测试页面，并且启动httpd

• [root@localhost ~]# echo "node2" > /var/www/html/index.html
  
• 
  
• [root@localhost ~]# service httpd start
  

启动 httpd：

LB1 LB2上启动PULSE服务，查看ipvsadm结果

• /etc/init.d/pulse start
  
• 
  
• Ipvsadm  -L –n
  

如果前面的配置正确，这里可以在lb1上看到正确的回显。

当我们将lib1的网线拔除后，分发服务将自动切换到lib2上。

当我们将node1的网线拔除后，分发器将把node1从分发列表中剔出。当我们将

node1的网线插回后，分发器又将把node1恢复到分发列表中去。

无论你如何测试，请使用额外的机器访问VIP，这也有利于测试分发器是否正确的保持

了session。