前期预备:" a, u) A9 }" d8 E
试验环境 Red Hat Enterprise Linux 4 U2$ l( q3 ~9 b$ v/ }& ~$ ?& |
软件版本 ipvsadm-1.24.tar.gz7 g+ g" @/ Q9 p9 L% w- S
编译安装注重
- j3 t# C7 O( `; q, C4 T! Z #pwd
# v4 [/ K+ R" e9 K/ d /usr/src; F2 {5 N$ P/ U, |9 j
#ln -s kernels/2.6.9-22.EL.i686 linux 假如没有目录则安装RPEM包kernel-devel-2.6.9-22.EL
; ?- H' \; {# A9 e #rpmbuild -tb ipvsadm-1.24.tar.gz8 L8 ?- V. n, J6 l# Y' g
#rpm -ivh /usr/src/redhat/RPEM/i386/ipvsadm-1.24-6.i386.rpm
) V7 Q# ^% z) `- T" S7 G$ l( ~ 正常使用时提示:
* F- p/ L* Z; r( ` [root@lvs boot]# ipvsadm5 J; G8 O" ?, M+ J$ h
IP Virtual Server version 1.2.0/ g, t3 F5 [0 o5 m2 z& o& T, p
Prot LocalAddress:Port Scheduler Flags
@, j! b+ w" m- D; ]; c( A* ^ - RemoteAddress:Port Forward Weight ActiveConn InActConn9 H# X+ y) J1 E
一、NAT方式& e( g! Y& t% c+ k5 Z6 G! y
Load Balance:192.168.1.1' d0 C8 K) H. C$ C& A" i) t* I
Virtual IP: 10.0.0.1
1 S8 Z$ _1 w: f) x. S RealServer1: 192.168.1.2
6 `! B5 K+ c. C$ S8 h RealServer2: 192.168.1.3
{ N2 Z& ^( @3 {+ p6 t! _' F nameserver: 192.168.1.1
0 S6 d" d6 p3 i$ |& u" g. w gateway: 192.168.1.1
( c# D8 V" Y( \+ S, N 1.开启路由机制
- c6 y5 N4 }, h #echo 1 /proc/sys/net/ipv4/ip_forward$ n+ q" r4 _7 I/ I8 p
注重:& d. @3 |/ r% [* v2 {6 p2 d
永久修改要修改sysctl.conf
4 A! G: q7 ]( m1 n 2.加载nat模块+ w( {' }; V. `4 H7 U* C
#modprobe iptable_nat
. a" V6 u2 y& \6 S1 p ?5 {# v. k) | 注重:
) N2 N5 }7 w) t, y+ b 用lsmod检查,另假如不加载此模块,也可以在第一次访问时成功,但是会在再次访问时出现延迟过长,或访问超时现象。4 e8 Y: L/ o; E; N1 Y
3.加载rule: [/ d0 [4 u% i6 X2 }9 k
#ipvsadm -A -t 10.0.0.1:80 -s rr
. \" L' o- x$ L) ?5 W #ipvsadm -a -t 10.0.0.1:80 -r 192.168.1.2:80 -m
: Q4 o, L3 f7 Y3 F7 H1 o- A+ j #ipvsadm -a -t 10.0.0.1:80 -r 192.168.1.3:80 -m, h' |: M3 V; F4 ]2 S) J. N
rr 轮询方式
0 Q4 J( T6 L: p+ G# Q" W) v: [0 g -m 设置为NAT方式- N- j5 P8 R0 I2 l7 V! W2 ?4 e; C! f9 b
4.保存rule3 g# B: U: @. K+ J
#ipvsadm ——save /etc/sysconfig/ipvsadm
$ G! ]( m- y/ d; M7 V% p 5.邦定vip2 S7 G: A5 m$ K8 X
#ifconfig eth0:1 10.0.0.1 netmask 255.255.255.0 borcast 10.0.0.255
' h6 P# h B7 M# \4 Q 6.RealServer设置
4 `- F C8 T: E RealServer1:/ c) C# g, l( G9 X: k( X
ip: 192.168.1.2- j4 X8 B* Y; y- a/ k+ ~, [
gateway: 192.168.1.12 I5 d5 x. N. k/ v! ?7 j$ k
nameserver: 192.168.1.17 e$ @+ d8 h% K% p P
开启HTTP服务,确认自己能够访问。, p/ s y; w+ O) Q+ U& y
RealServer2:+ c; n3 n) B. J% k9 N; K2 y
ip: 192.168.1.3
8 {3 v( W8 S* ^6 B9 V& @ gateway: 192.168.1.1! [/ `6 h( ~7 [3 z0 x
nameserver: 192.168.1.1+ M! F8 t) i; P7 V/ \6 N$ x
开启HTTP服务,确认自己能够访问。页面与realserver1不同就可以。/ Q! N; [3 k' i' ]$ v2 Y
7.测试
* Q8 {% g5 L8 q2 C 选择一台主机,ip设置10.0.0.2 ,访问http://10.0.0.1反复刷新网页,每次出现的网页不同则表示成功。* z" @+ {( Y" ^: t. h
二、Direct Routing方式
* u" X, E; x$ @) n. f! n4 a Load Balance:192.168.1.1
2 P! q$ S( ~2 w9 r& ? Virtual IP: 10.0.0.10 m2 U: F0 m3 }' G5 W
RealServer1: 192.168.1.2! E6 K( ?- a. `8 a# D C
RealServer2: 192.168.1.3
, F2 X( o5 A1 I5 Q( ]3 G( I nameserver: 192.168.1.2549 s; }7 F0 y+ @ u' y% K; e* z
gateway: 192.168.1.254
|2 y# B! w# h 1.开启路由机制/ j# m6 K% s- t% _ ^' D) Q
#echo 1 /proc/sys/net/ipv4/ip_forward
+ \! P. x: i9 l: F( c, C 注重:
$ B, q5 v9 v7 x 永久修改要修改sysctl.conf
- l7 y, ^4 r7 t- t: D/ f 2.加载rule
- G# F! i# i. d/ o$ N #ipvsadm -A -t 10.0.0.1:80 -s rr ]% ?& y2 _" T
#ipvsadm -a -t 10.0.0.1:80 -r 192.168.1.2:80 -g6 \3 v, F2 `/ [9 B% P+ Z
#ipvsadm -a -t 10.0.0.1:80 -r 192.168.1.3:80 -g# `9 t% J: z- h+ x2 x
rr 轮询方式
- G/ v3 ?3 H" c1 P% Q w2 P -g 设置为DR方式+ B3 V5 A( u( s6 g, P' b
3.保存rule* f' `- [: s6 G* O1 D. k" H
#ipvsadm ——save /etc/sysconfig/ipvsadm
I8 |) {& g0 A+ z, v 4.邦定vip% ?5 c7 C+ P; a0 K% a2 A$ @3 D: w
#ifconfig eth0:1 10.0.0.1 netmask 255.255.255.0 borcast 10.0.0.255
3 Q5 }5 m# P( | ~% Y) \8 y5 ] 4.RealServer设置' ]6 \1 J" m6 g! {$ v
RealServer1:) O; q W8 e3 l! Z% e# O. q
ip: 192.168.1.2
7 |, h$ x) J" B4 C* q E. f gateway: 192.168.1.2541 b/ P3 V0 E0 o( A
nameserver: 192.168.1.254
3 }. X; |: t5 l) _ #ifconfig lo:1 10.0.0.1 netmask 255.255.255.255 borcast 10.0.0.1
- w; o8 Q8 `! P/ z$ T: c) n #echo 1 /proc/sys/net/ipv4/conf/lo/arp_ignore 注释:这四句目的是为了关闭ARP广播响应; e( u( `5 p1 I. }5 l
#echo 2 /proc/sys/net/ipv4/conf/lo/arp_announce7 |$ O6 n# n* R8 M4 U& m
#echo 1 /proc/sys/net/ipv4/conf/all/arp_ignore
! H$ G1 E& W- f* U4 {' c1 G! r #echo 2 /proc/sys/net/ipv4/conf/all/arp_announce
/ u* r0 \+ e2 | 开启HTTP服务,确认自己能够访问。 |