虚拟机中Lvs配置
参考：http://zh.linuxvirtualserver.org/node/272
环境，三台centos 5.2。基于ipvsadm的负载均衡，采用DR方式，负载均衡的服务是web。
内核版本： linux 2.6.18-92.el5
Director PC:192.168.2.11
Virtual ip :192.168.2.10 255.255.255.0
Real server 1: 192.168.2.12
Real server 2: 192.168.2.13
由于linux的内核版本支持安装ipvs了。所以机器均在DIRECTOR 上面操作：
这只需要下载一个ipvsadm-1.24.tar.gz
# tar zxvf ipvsadm-1.24.tar.gz
# cd ipvsadm-1.24
# ls -alh /usr/src/
[root@localhost network-scripts]# ls -alh /usr/src
total 36K
drwxr-xr-x 4 root root 4.0K Dec 11 01:41 .
drwxr-xr-x 15 root root 4.0K Dec 11 01:42 ..
drwxr-xr-x 3 root root 4.0K Dec 11 00:20 kernels
lrwxrwxrwx 1 root root 36 Dec 11 01:41 linux -> /usr/src/kernels/2.6.18-92.el5-i686/
//查看有没有linux目录，如果没有根据自己的内核版本做个软连接，否则安装 安装heartbeat-2.0.2.tar.gz 是集成安装在说吧
//yum -y install gcc+
//yum -y install wget
//yum -y install httpd
//yum -y install libnet
//yum -y install ipvaadm
//yum -y install heartbeat
除了编辑：vi /etc/sysctl.conf
echo "1" > /proc/sys/net/ipv4/ip_forward
[root@localhost network-scripts]# sysctl -p
net.ipv4.ip_forward = 1
还需要增加以下几项：
echo "1" > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" > /proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce
/etc/sysconfig/network-scripts
[root@localhost network-scripts]# touch ifcfg-eth0:0
[root@localhost network-scripts]# vi ifcfg-eth0:0
//ifconfig eth0:0 192.168.2.10 netmask 255.255.255.255 broadcast 192.168.2.10 up //这样添加到网卡地址重起系统或者重起网络服务后，地址随即丢失
DEVICE=eth0:0
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.2.10
NETMASK=255.255.255.255
BROADCAST=192.168.2.255
[root@localhost network-scripts]# ifconfig eth0:0 192.168.2.10 netmask 255.255.255.255 up
[root@localhost network-scripts]# route add -host 192.168.2.10 dev eth0:0
[root@localhost network-scripts]# service network restart
[root@localhost network-scripts]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:2A:5E:D9
inet addr:192.168.2.11 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe2a:5ed9/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:30970 errors:0 dropped:0 overruns:0 frame:0
TX packets:6686 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:6998626 (6.6 MiB) TX bytes:788838 (770.3 KiB)
Interrupt:177 Base address:0×1080
eth0:0 Link encap:Ethernet HWaddr 00:0C:29:2A:5E:D9
inet addr:192.168.2.10 Bcast:192.168.2.255 Mask:255.255.255.255
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:177 Base address:0×1080
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:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
[root@localhost network-scripts]# ipvsadm -C
[root@localhost network-scripts]# ipvsadm -A -t 192.168.2.10:80 -s rr
[root@localhost network-scripts]# ipvsadm -a -t 192.168.2.10:80 -r 192.168.2.12 -g
[root@localhost network-scripts]# ipvsadm -a -t 192.168.2.10:80 -r 192.168.2.13 -g
[root@localhost network-scripts]# ipvsadm -L
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.2.10:http rr
-> 192.168.2.13:http Route 1 0 0
-> 192.168.2.12:http Route 1 0 0
[root@localhost network-scripts]# service iptables stop
2、realserver服务器
//ifconfig eth0:0 192.168.1.254 netmask 255.255.255.255 broadcast 192.168.1.254 up 这样配置的关键之一配置/etc/sysctl.conf文件来关闭arp。
echo "1" > /proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" > /proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce
echo "0" > /proc/sys/net/ipv4/conf/lo/rp_filter
配置ip地址和网关。
[root@localhost html]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:08:55:6E
inet addr:192.168.2.12 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe08:556e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:23169 errors:0 dropped:0 overruns:0 frame:0
TX packets:2837 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2329432 (2.2 MiB) TX bytes:319497 (312.0 KiB)
Interrupt:177 Base address:0×1080
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:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
lo:0 Link encap:Local Loopback
inet addr:192.168.2.10 Mask:255.255.255.255
UP LOOPBACK RUNNING MTU:16436 Metric:1
另一台一样配置：
[root@localhost html]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:5C:E6:60
inet addr:192.168.2.13 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe5c:e660/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:24133 errors:0 dropped:0 overruns:0 frame:0
TX packets:6582 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2369914 (2.2 MiB) TX bytes:1004032 (980.5 KiB)
Interrupt:177 Base address:0×1080
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:1344 (1.3 KiB) TX bytes:1344 (1.3 KiB)
lo:0 Link encap:Local Loopback
inet addr:192.168.2.10 Mask:255.255.255.255
UP LOOPBACK RUNNING MTU:16436 Metric:1
Iptables 先也全部关闭。测试后在开启相应端口。
分别访问：http://192.168.2.11 http://192.168.2.12 http://192.168.2.13 都可以访问
不断刷新http://192.168.2.10 即可见轮询
[root@localhost network-scripts]# ipvsadm -L
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.2.10:http rr
-> 192.168.2.13:http Route 1 0 31
-> 192.168.2.12:http Route 1 0 27
转自：http://cache.baiducontent.com/c?m=9d78d513d9d437a94f9be7690c66c0101b43f7682ba6d60208d48449e3732b31501290ac26520775d1d20b1316ae394b9af22102371456b28cb88a5ddccbc37f73ce7a75671cf75663d50ed9ba5124b137e15dfed81ff0ccf425e2afc5d2af0a178b44040a97818b4d7416de28b04a3eb9e0df0a025e63a7f07b38a2112d6e882337e71aa6fd256f73c3e1dc2a4dc1&p=8b2a970480d011a058ed9760565e90&newp=9b62e71d8ad212a05abd9b7e0d15cc231610db2151d2d212&user=baidu&fm=sc&query=%D4%DA%D0%E9%C4%E2%BB%FA%C0%EF%B0%B2%D7%B0centos+%C4%DC%C5%E4%D6%C3lvs%C2%F0&qid=&p1=1
