RHEL 6.5----LVS（DR）

最新推荐文章于 2018-10-03 21:02:32 发布

原创最新推荐文章于 2018-10-03 21:02:32 发布 · 222 阅读

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本文介绍如何在RHEL6.5系统中搭建LVS (DR模式) 负载均衡集群，包括安装配置过程、规则设置及验证步骤。详细展示了master节点与real server节点的具体操作。

RHEL 6.5----LVS（DR）

主机名	IP	所需软件
master	eth0==>192.168.30.140(Nat) eth0:1==>192.168.17.130(Nat)	ipvsadm
node-1	eth0==>192.168.17.131	httpd
node-2	eth0==>192.168.17.132	httpd

在master上安装及开启ipvsadm

[root@master ~]# yum install -y ipvsadm
[root@master ~]# cd /etc/sysconfig/network-scripts/
[root@master network-scripts]# cp ifcfg-eth0 ifcfg-eth:1
[root@master network-scripts]# vim ifcfg-eth0:1 #只需修改绿色部分三处，其他不要动
DEVICE=eth0:1
TYPE=Ethernet
UUID=a186cc9d-8d79-4027-a180-a1b17d884a7b
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=none
HWADDR=00:0C:29:4D:47:50
IPADDR=192.168.30.130
PREFIX=24
GATEWAY=192.168.30.2
DNS1=119.29.29.29
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System eth0:1"
重启网络服务
[root@master ~]# service network restart 
Shutting down interface eth0:  Device state: 3 (disconnected)
                                                           [  OK  ]
Shutting down interface eth1:                              [  OK  ]
Shutting down loopback interface:                          [  OK  ]
Bringing up loopback interface:                            [  OK  ]
Bringing up interface eth0:  Active connection state: activated
Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/1
                                                           [  OK  ]
[root@master ~]# ifconfig 
eth0      Link encap:Ethernet  HWaddr 00:0C:29:4D:47:50  
          inet addr:192.168.30.140  Bcast:192.168.30.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fe4d:4750/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:81 errors:0 dropped:0 overruns:0 frame:0
          TX packets:105 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:8687 (8.4 KiB)  TX bytes:8194 (8.0 KiB)

eth0:1    Link encap:Ethernet  HWaddr 00:0C:29:4D:47:50  #MAC地址一定要与eth0的一样
          inet addr:192.168.30.130  Bcast:192.168.30.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

添加规则

确保这里是0
[root@master ~]# sysctl -p
net.ipv4.ip_forward = 0
..........
添加规则
[root@master ~]# ipvsadm -A -t 192.168.30.130:80 -s rr
[root@master ~]# ipvsadm -a -t 192.168.30.130:80 -r 192.168.30.131 -g
[root@master ~]# ipvsadm -a -t 192.168.30.130:80 -r 192.168.30.132 -g
[root@master ~]# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.30.130:80 rr
  -> 192.168.30.131:80            Route   1      0          0         
  -> 192.168.30.132:80            Route   1      0          0 
保存规则
[root@master ~]# /etc/init.d/ipvsadm save
ipvsadm: Saving IPVS table to /etc/sysconfig/ipvsadm:      [  OK  ]

在realserver(node-1和node-2)上

生成ifcfg-lo:1文件
[root@node-1 ~]# cd /etc/sysconfig/network-scripts/
[root@node-1 network-scripts]# cp ifcfg-lo ifcfg-lo:1
[root@node-1 network-scripts]# vim ifcfg-lo:1
DEVICE=lo:1
IPADDR=192.168.30.130
NETMASK=255.255.255.255
# If you're having problems with gated making 127.0.0.0/8 a martian,
# you can change this to something else (255.255.255.255, for example)
ONBOOT=yes
NAME=loopback

关闭ARP转发

[root@node-1 ~]# vim /etc/sysctl.conf  #末未添加
net.ipv4.conf.eth0.arp_ignore = 1
net.ipv4.conf.eth0.arp_announce = 2
[root@node-1 ~]# sysctl -p  #使立即生效
net.ipv4.ip_forward = 0
.....
net.ipv4.conf.eth0.arp_ignore = 1
net.ipv4.conf.eth0.arp_announce = 2

修改网关

[root@node-1 ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0
GATEWAY=192.168.30.2
#网关修改为指向外网出口的路由器IP

创建测试页面

[root@node-1 ~]# echo "<h1>This is the node-1 Web-Server:192.168.17.131</h1>" > /var/www/html/index.html

在node-2上

[root@node-2 ~]# cd /etc/sysconfig/network-scripts/
[root@node-2 network-scripts]# cp ifcfg-lo ifcfg-lo:1
[root@node-2 network-scripts]# vim ifcfg-lo:1
DEVICE=lo:1
IPADDR=192.168.30.130
NETMASK=255.255.255.255
# If you're having problems with gated making 127.0.0.0/8 a martian,
# you can change this to something else (255.255.255.255, for example)
ONBOOT=yes
NAME=loopback
[root@node-2 ~]# service network restart 
Shutting down interface eth0:  Device state: 3 (disconnected)
                                                           [  OK  ]
Shutting down interface eth1:                              [  OK  ]
Shutting down loopback interface:                          [  OK  ]
Bringing up loopback interface:                            [  OK  ]
Bringing up interface eth0:  Active connection state: activated
Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/3
                                                           [  OK  ]
[root@node-2 ~]# ifconfig 
eth0      Link encap:Ethernet  HWaddr 00:50:56:2F:84:4D  
          inet addr:192.168.30.132  Bcast:192.168.30.255  Mask:255.255.255.0
          inet6 addr: fe80::250:56ff:fe2f:844d/64 Scope:Link
...................
lo:1      Link encap:Local Loopback  
          inet addr:192.168.30.130  Mask:255.255.255.255
          UP LOOPBACK RUNNING  MTU:16436  Metric:1

关闭ARP转发通node-1操作一样；

创建测试页面

[root@node-2 ~]# echo "<h1>This is the node-2 Web-Server:192.168.17.132</h1>" > /var/www/html/index.html
[root@node-2 ~]# service httpd restart 
Stopping httpd:                                            [  OK  ]
Starting httpd:                                            [  OK  ]

物理机使用浏览器访问测试