LVS集群-DR模式

同上个实验一样，还是准备三台机器

分发器（sishen_63）：eth0 192.168.1.63

RealServer1sishen_64）

RealServer2sishen_65）

首先配置网卡eth0

[root@sishen_63 ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0

TYPE=Ethernet

UUID=2720a3a8-031a-484e-8d10-6856a76a1922

ONBOOT=yes

NM_CONTROLLED=yes

BOOTPROTO=none

HWADDR=00:0c:29:c2:28:31

DEFROUTE=yes

PEERROUTES=yes

IPV4_FAILURE_FATAL=yes

IPV6INIT=no

NAME="System eth0"

IPADDR=192.168.1.63

NETMASK=255.255.255.0

GATEWAY=192.168.1.1

USERCTL=no

生成eth0:1配置文件，直接cp eth0 –> eth0:1,见如下步骤

[root@sishen_63 ~]# cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0:1

[root@sishen_63 ~]# vim !$

vim /etc/sysconfig/network-scripts/ifcfg-eth0:1

[root@sishen_63 ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0:1

[root@sishen_63 ~]# service network restart

然后修改绿色标注部分，最后重启网络;

配置vim eth0:1

DEVICE=eth0:1

TYPE=Ethernet

UUID=2720a3a8-031a-484e-8d10-6856a76a1922

ONBOOT=yes

NM_CONTROLLED=yes

BOOTPROTO=none

HWADDR=00:0c:29:c2:28:31

DEFROUTE=yes

PEERROUTES=yes

IPV4_FAILURE_FATAL=yes

IPV6INIT=no

NAME="System eth0:1"

IPADDR=192.168.1.6

NETMASK=255.255.255.0

GATEWAY=192.168.1.1

USERCTL=no

注意：黄色标注部分不需要更改！

[root@sishen_63 ~]# ifconfig

eth0      Link encap:Ethernet  HWaddr 00:0C:29:C2:28:31 
           inet addr:192.168.1.63  Bcast:192.168.1.255  Mask:255.255.255.0
           inet6 addr: fe80::20c:29ff:fec2:2831/64 Scope:Link
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:201 errors:0 dropped:0 overruns:0 frame:0
           TX packets:214 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:25196 (24.6 KiB)  TX bytes:17442 (17.0 KiB)

eth0:1    Link encap:Ethernet  HWaddr 00:0C:29:C2:28:31 
          inet addr:192.168.1.6  Bcast:192.168.1.255  Mask:255.255.255.0
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

安装LVS工具

[root@sishen_63 ~]# rpm -ivh /mnt/cdrom/Packages/ipvsadm-1.26-2.el6.x86_64.rpm

配置LVS-DR规则

在分发器（sishen_63）上：

[root@sishen_63 ~]# ipvsadm -A -t 192.168.1.6:80 -s rr

[root@sishen_63 ~]# ipvsadm -a -t 192.168.1.6:80 -r 192.168.1.64 -g

[root@sishen_63 ~]# ipvsadm -a -t 192.168.1.6:80 -r 192.168.1.65 -g

[root@sishen_63 ~]# ipvsadm -L -n

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags
   -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

TCP  192.168.1.6:80 rr
   -> 192.168.1.64:80              Route   1      0          0        
   -> 192.168.1.65:80              Route   1      0          0        

[root@sishen_63 ~]# /etc/init.d/ipvsadm save

ipvsadm: Saving IPVS table to /etc/sysconfig/ipvsadm:      [  OK  ]

在RealServer1（sishen_64）上

[root@sishen_64 ~]# cd /etc/sysconfig/network-scripts/

[root@sishen_64 network-scripts]# cp ifcfg-lo ifcfg-lo:1      #生成回环口配置文件

[root@sishen_64 network-scripts]# vim ifcfg-lo:1

DEVICE=lo:1

IPADDR=192.168.1.63

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

将复制后的ifcfg-lo:1修改为图中绿色标注的内容；

[root@sishen_64 network-scripts]# service network restart

[root@sishen_64 network-scripts]# ifconfig

eth0      Link encap:Ethernet  HWaddr 00:0C:29:11:5A:8C 
          inet addr:192.168.1.74  Bcast:192.168.1.255  Mask:255.255.255.0
           inet6 addr: fe80::20c:29ff:fe11:5a8c/64 Scope:Link
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:93 errors:0 dropped:0 overruns:0 frame:0
           TX packets:111 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:12005 (11.7 KiB)  TX bytes:8338 (8.1 KiB)

lo        Link encap:Local Loopback 
           inet addr:127.0.0.1  Mask:255.0.0.0
           inet6 addr: ::1/128 Scope:Host
           UP LOOPBACK RUNNING  MTU:16436  Metric:1
           RX packets:32 errors:0 dropped:0 overruns:0 frame:0
           TX packets:32 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:2212 (2.1 KiB)  TX bytes:2212 (2.1 KiB)

lo:1      Link encap:Local Loopback 
           inet addr:192.168.1.63  Mask:255.255.255.0
           UP LOOPBACK RUNNING  MTU:16436  Metric:1

关闭ARP转发

临时生效：

[root@sishen_64 ~]# echo 1 > /proc/sys/net/ipv4/conf/eth0/arp_ignore

[root@sishen_64 ~]# echo 2 > /proc/sys/net/ipv4/conf/eth0/arp_announce

永久生效需要在/etc/sysctl.conf文件末尾添加如下内容：

[root@sishen_64 ~]# vim /etc/sysctl.conf

net.ipv4.conf.eth0.arp_ignore = 1

net.ipv4.conf.eth0.arp_announce = 2

注意：至于这两个参数的值意味着什么意思，我暂时还没搞得太清楚，不敢确定，所以这里没有写，希望各路大侠给予指点^_^!

[root@sishen_64 ~]# sysctl –p

查看并确保网关指向公网

[root@sishen_64 ~]# grep 'GATEWAY' /etc/sysconfig/network-scripts/ifcfg-eth0

GATEWAY=192.168.1.1

开启web服务并创建测试页面

[root@sishen_64 ~]# service httpd start

Starting httpd:                                            [  OK  ]

[root@sishen_64 ~]# echo "sishen_64" > /var/www/html/index.html

本地测试可以正常访问

[root@sishen_64 ~]# elinks 192.168.1.65 --dump
    sishen_65

在RealServer2（sishen_65）上：

[root@sishen_65 network-scripts]# cp ifcfg-lo ifcfg-lo:1

[root@sishen_65 network-scripts]# vim ifcfg-lo:1

DEVICE=lo:1
IPADDR=192.168.1.63
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@sishen_65 network-scripts]# service network restart

[root@sishen_65 ~]# cd /etc/sysconfig/network-scripts/

[root@sishen_65 network-scripts]# ifconfig

eth0      Link encap:Ethernet  HWaddr 00:0C:29:A9:43:61 
           inet addr:192.168.1.65  Bcast:192.168.1.255  Mask:255.255.255.0
           inet6 addr: fe80::20c:29ff:fea9:4361/64 Scope:Link
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:420 errors:0 dropped:0 overruns:0 frame:0
           TX packets:416 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:55468 (54.1 KiB)  TX bytes:37696 (36.8 KiB)

lo        Link encap:Local Loopback 
           inet addr:127.0.0.1  Mask:255.0.0.0
           inet6 addr: ::1/128 Scope:Host
           UP LOOPBACK RUNNING  MTU:16436  Metric:1
           RX packets:16 errors:0 dropped:0 overruns:0 frame:0
           TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:960 (960.0 b)  TX bytes:960 (960.0 b)

lo:1      Link encap:Local Loopback 
           inet addr:192.168.1.63  Mask:255.255.255.255
           UP LOOPBACK RUNNING  MTU:16436  Metric:1

关闭ARP转发

在/etc/sysctl.conf 文件末尾添加以下两行内容

[root@sishen_65 ~]# vim /etc/sysctl.conf

net.ipv4.conf.eth0.arp_ignore = 1
net.ipv4.conf.eth0.arp_announce = 2

[root@sishen_65 ~]# sysctl -p

开启web服务并创建测试页

[root@sishen_65 ~]# echo "sishen_65" > /var/www/html/index.html

[root@sishen_65 ~]# service httpd start

Starting httpd:                                            [  OK  ]

[root@sishen_65 ~]# yum install -y elinks

本地测试web服务

[root@sishen_65 ~]# elinks 192.168.1.65 --dump
    sishen_65

确保机器之间相互可以ping通，然后宿主机也可以ping通三台机器，（注意：这里不可以在分发器（sishen_63）上测试），用宿主机浏览器测试

遇到的问题就是

无论怎么刷新，都刷不出sishen_64,相互之间都是通的，防火墙什么的都关闭了，服务也都启动了，但就是不通。在随后的博客中解决吧，也希望有知道原因的大神请赐教：1255560195@qq.com，谢谢^_^