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LVS-DR模式搭建过程详解

2016-09-30 14:31 393 查看

LVS-DR（director route）模式框架图：

说明：（图上IP地址有误，以下表为准）

分发器	Realserver1	Realserver2
DIP eth0 : 192.168.11.70	RIP eth0 : 192.168.11.62	RIP eth0 : 192.168.11.64
DG : 192.168.11.1	DG : 192.168.11.1	DG : 192.168.11.1
VIP eth0:1 192.168.11.63	VIP lo:1 192.168.11.63	VIP lo:1 192.168.11.63

一、配置分发器的网络环境

[root@xuegod63 ~]# cd /etc/sysconfig/network-scripts/
[root@xuegod63 network-scripts]# cat ifcfg-eth0
DEVICE=eth0
HWADDR=00:0c:29:db:62:b6
NM_CONTROLLED=yes
ONBOOT=yes
IPADDR=192.168.11.70
BOOTPROTO=none
NETMASK=255.255.255.0
DNS2=8.8.8.8
TYPE=Ethernet
GATEWAY=192.168.11.1
DNS1=192.168.11.1
IPV6INIT=no
USERCTL=no
[root@xuegod63 network-scripts]# cp ifcfg-eth0 ifcfg-eth0:1
[root@xuegod63 network-scripts]# vim ifcfg-eth0:1
[root@xuegod63 network-scripts]# cat ifcfg-eth0:1
DEVICE=eth0:1
HWADDR=00:0c:29:db:62:b6
NM_CONTROLLED=yes
ONBOOT=yes
IPADDR=192.168.11.63
BOOTPROTO=none
NETMASK=255.255.255.0
IPV6INIT=no
USERCTL=no
[root@xuegod63 network-scripts]# service NetworkManager stop
# 这里必须关闭NetworkManager 服务，否则eth0:1不出来
[root@xuegod63 network-scripts]# service network restart
[root@xuegod63 network-scripts]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0C:29:DB:62:B6
inet addr:192.168.11.70  Bcast:192.168.11.255  Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fedb:62b6/64 Scope:Link
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:7657 errors:0 dropped:0 overruns:0 frame:0
TX packets:5466 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3521642 (3.3 MiB)  TX bytes:540272 (527.6 KiB)
Interrupt:19 Base address:0x2000

eth0:1    Link encap:Ethernet  HWaddr 00:0C:29:DB:62:B6
inet addr:192.168.11.63  Bcast:192.168.11.255  Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
Interrupt:19 Base address:0x2000

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)

二、配置LVS-DR的规则（首先安装 ipvsadm）

[root@xuegod63 ~]# rpm -ivh /mnt/Packages/ipvsadm-1.25-9.el6.x86_64.rpm
[root@xuegod63 ~]# rpm -qa | grep ipvsadm
ipvsadm-1.25-9.el6.x86_64
[root@xuegod63 ~]# ipvsadm -A -t 192.168.11.63:80 -s rr
[root@xuegod63 ~]# ipvsadm -a -t 192.168.11.63:80 -r 192.168.11.62 -g
[root@xuegod63 ~]# ipvsadm -a -t 192.168.11.63:80 -r 192.168.11.64 -g
# -g DR模式  -m NAT模式 -i IPtun模式
[root@xuegod63 ~]# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.11.63:80 rr
-> 192.168.11.62:80             Route   1      0          0
-> 192.168.11.64:80             Route   1      0          0

三、真实机（192.168.11.62）上配置
1）安装httpd 服务，并开启

[root@xuegod62 ~]# yum install -y httpd
[root@xuegod62 ~]# echo 192.168.11.62 >  /var/www/html/index.html
[root@xuegod62 ~]# /etc/init.d/httpd start
正在启动 httpd：                                           [确定]
[root@xuegod62 ~]# netstat -tunpl | grep 80
tcp        0      0 :::80           :::*         LISTEN      4245/httpd

2）配置网络环境

[root@xuegod62 ~]# cd /etc/sysconfig/network-scripts/
[root@xuegod62 network-scripts]# cp ifcfg-lo ifcfg-lo:1
[root@xuegod62 network-scripts]# vim ifcfg-lo:1
[root@xuegod62 network-scripts]# cat ifcfg-lo:1
DEVICE=lo:1
IPADDR=192.168.11.63
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@xuegod62 network-scripts]# service NetworkManager stop
[root@xuegod62 network-scripts]# service network restart
[root@xuegod62 network-scripts]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0C:29:9D:0C:1E
inet addr:192.168.11.62  Bcast:192.168.11.255  Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe9d:c1e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
RX packets:8515 errors:0 dropped:0 overruns:0 frame:0
TX packets:5649 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:6454017 (6.1 MiB)  TX bytes:514102 (502.0 KiB)
Interrupt:19 Base address:0x2000

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:192.168.11.63  Mask:255.255.255.255
UP LOOPBACK RUNNING  MTU:16436  Metric:1

3）关闭ARP包转发

[root@xuegod62 ~]# vim /etc/sysctl.conf     #文件末尾加上如下两行
net.ipv4.conf.eth0.arp_ignore = 1
net.ipv4.conf.eth0.arp_announce = 2
[root@xuegod62 ~]# sysctl -p
或者
[root@xuegod62 ~]# echo 1 > /proc/sys/net/ipv4/conf/eth0/arp_ignore
[root@xuegod62 ~]# echo 2 > /proc/sys/net/ipv4/conf/eth0/arp_announce

四、测试
在客户机（实体机）浏览器中测试，不要在分发器机器上测试。效果如下：

-------------------------------------------------------------------------------------

在分发器上查看链接数据状态

[root@xuegod63 network-scripts]# ipvsadm -L -n --stats
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port               Conns   InPkts  OutPkts  InBytes OutBytes
-> RemoteAddress:Port
TCP  192.168.11.63:80                   35      173        0    23145        0
-> 192.168.11.62:80                   17       85        0    11709        0
-> 192.168.11.64:80                   18       88        0    11436        0

至此，LVS-DR模式就搭建成功！更多ipvsadm命令的用法，请见我另外一篇博文‘ipvsadm命令的用法’http://autophp.blog.51cto.com/8062337/1858071

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