負(fù)載均衡之nat模式實(shí)操

掃一掃 即可關(guān)注LVS負(fù)載均衡之NAT模式實(shí)操主講：Merinlvs

nat

模式lvs

nat

模式拓?fù)鋵?shí)驗(yàn)環(huán)境L

inux CentOS

release

5.5(Final)1.client:

ip:112.LVSvip:1

=>eth0:0ip:

=>

eth03.web-server1 ip:

=>

eth04.web-server2

ip:

=>

eth0LVS服務(wù)器操作步驟開啟IP轉(zhuǎn)發(fā)echo"1"

>/proc/sys/net/ipv4/ip_forward關(guān)掉ICMPecho

"0">/proc/sys/net/ipv4/conf/all/send_redirectsecho"0"

>/proc/sys/net/ipv4/conf/default/send_redirectsecho

"0">/proc/sys/net/ipv4/conf/eth0/send_redirects3.IP及網(wǎng)關(guān)配置/sbin/ifconfig

eth0

broadcast

55netmask

/sbin/ifconfig

eth0:01broadcast

55netmask/sbin/route

adddefaultgw

netmask

metric1測(cè)試網(wǎng)絡(luò)連通性

#ping-c1

#

ping

-c

1

3Ipvsadm配置及啟動(dòng)/sbin/ipvsadm

–C/sbin/ipvsadm

-A

-t

1:80

-s

rr/sbin/ipvsadm

-a

-t

1:80

-r

:80

-m

-w

1/sbin/ipvsadm

-a

-t

1:80

-r

:80

-m

-w

1/sbin/ipvsadm保存：/etc/init.d/ipvsadm

save啟動(dòng)：/etc/init.d/ipvsadm

startWeb-server1服務(wù)器操作步驟1.關(guān)閉IP轉(zhuǎn)發(fā)echo

“0">/proc/sys/net/ipv4/ip_forward3.IP及網(wǎng)關(guān)配置/sbin/ifconfig

eth0

broadcast

55

netmask

/sbin/route

add

default

gw

/bin/netstat

-rnping

-c

1

ping

-c

1

3.開啟http#lsof

–i:80

查看是否有進(jìn)程占用80端口

#/etc/init.d/httpd

start#/usr/local/apache2/bin/httpd啟動(dòng)httpdWeb-server2服務(wù)器操作步驟1.關(guān)閉IP轉(zhuǎn)發(fā)echo

“0">/proc/sys/net/ipv4/ip_forward3.IP及網(wǎng)關(guān)配置/sbin/ifconfig

eth0

broadcast

55

netmask

修改IP地址/sbin/route

add

default

gw

配置網(wǎng)關(guān)#show

routing

table/bin/netstat-rn

查看路由表

#checking

if

DEFAULT_GW

is

reachableping-c

1

#looking

for

VIP

on

director

from

realserverping-c

1

測(cè)試網(wǎng)絡(luò)連通性3.開啟http#lsof

–i:80

查看是否有進(jìn)程占用80端口

#/etc/init.d/httpd

start#/usr/local/apache2/bin/httpd啟動(dòng)httpdipvsadm

重點(diǎn)參數(shù)-C

清除表中所有的記錄-A--add-service在服務(wù)器列表中新添加一條新的虛擬服務(wù)器記錄-t

表示為tcp服務(wù)-u

表示為udp服務(wù)-s--scheduler使用的調(diào)度算法，rr

|wrr

|lc|wlc|lblb|lblcr|dh|sh|sed|nq

默認(rèn)調(diào)度算法是wlcipvsadm

-a

-t

87:80

-r

0:80

-m

-w

1-a--add-server

在服務(wù)器表中添加一條新的真實(shí)主機(jī)記錄-t--tcp-service

說(shuō)明虛擬服務(wù)器提供tcp服務(wù)-u--udp-service

說(shuō)明虛擬服務(wù)器提供udp服務(wù)-r--real-server

真實(shí)服務(wù)器地址-m--masquerading

指定LVS工作模式為NAT模式-w--weight

真實(shí)服務(wù)器的權(quán)值-g--gatewaying

指定LVS工作模式為直接路由器模式（也是LVS默認(rèn)的模式）-i--ipip

指定LVS的工作模式為隧道模式-p

會(huì)話保持時(shí)間，