CentOS 5
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Pound - Install/Configure2008/08/15
 
Install Pound to make the server load balancer.
This example shows to configure on the environment like follows 
(1) www.srv.world       [10.0.0.50]   Pound Server
(2) www01.srv.world   [10.0.0.51]   Web Server#1 ( receive requests to www.srv.world )
(3) www02.srv.world   [10.0.0.52]   Web Server#2 ( receive requests to www.srv.world )
(4) www03.srv.world   [10.0.0.53]   Web Server#3 ( receive requests to www.virtual.host )
(5) www04.srv.world   [10.0.0.54]   Web Server#4 ( receive requests to anything except them above )
[1] Install and Configure Pound
[root@www ~]#
yum --enablerepo=epel -y install Pound
 
# install from EPEL
[root@www ~]#
vi /etc/pound.cfg
# line 13: add ( log level - max=5 )

LogLevel 3
# line 14: add ( Interval of heartbeat - seconds )

Alive 30
# line 21-25: make it comments

#
ListenHTTPS
#
  Address 0.0.0.0
#
  Port 443
#
  Cert "/etc/pki/tls/certs/pound.pem"
#
End
Service
# for the requests to www.srv.world

HeadRequire "Host: .*www.srv.world"

BackEnd

# backend server's IP address

Address
10.0.0.51

# backend server's port

Port
80

End
BackEnd

# backend server's IP address

Address
10.0.0.52

# backend server's port

Port
80

End

End
Service
# for the requests to www.virtual.host

HeadRequire "Host: .*www.virtual.host"

BackEnd

# backend server's IP address

Address 10.0.0.53

# backend server's port

Port 80

End

End
Service
# for the requests to anything except them avobe

HeadRequire "Host: .*"

BackEnd

# backend server's IP address

Address 10.0.0.54

# backend server's port

Port 80

End

End
[root@www ~]#
/etc/rc.d/init.d/pound start

Starting Pound: starting...
[ OK ]
[root@www ~]#
chkconfig pound on
[2] Access to the Pound Server ( www.srv.world ) with Web browser and make sure www01.srv.world answers like follows.
[3] Shutdown www01.srv.world by manually, then www02.srv.world answers like follows.
[4] Access to the URI www.virtual.host, then www03.srv.world answers like follows.
[5] Access to the IP address directly, then www04.srv.world answered.
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