Setup linux test client: Difference between revisions

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{| width="50%"  <-- Test !-->
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Linux Test setup, it has been tested on
Linux Test setup, it has been tested on
*Debian 8
*Debian 8
*Apache 2.4
*Apache 2.4
*Hostname used for the test: myLVS-LinuxClient
*Hostname used for the test: '''myLVS-LinuxClient'''
| valign="top" |
[[File:myLVS-HL-Linux.png|240px]]<br><br>
|}
 


=System settings to configure the loop back adapter=
=System settings to configure the loop back adapter=


Edit '''/etc/sysctl.conf''' and add:
To make the change permanent you may edit '''/etc/sysctl.conf''' and add:
  net.ipv4.conf.eth0.arp_ignore = 1
  net.ipv4.conf.eth0.arp_ignore = 1
  net.ipv4.conf.eth0.arp_announce = 2
  net.ipv4.conf.eth0.arp_announce = 2
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  net.ipv4.conf.all.arp_announce = 2
  net.ipv4.conf.all.arp_announce = 2


Either unload your network adapter and apply the above settings or simply reboot.
Apply:
sysctl -p
 
To make it applied immediately you can set:
root@myLVS-LinuxClient:~# '''echo "1" > /proc/sys/net/ipv4/conf/eth0/arp_ignore'''
root@myLVS-LinuxClient:~# '''echo "2" > /proc/sys/net/ipv4/conf/eth0/arp_announce'''
root@myLVS-LinuxClient:~# '''echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore'''
root@myLVS-LinuxClient:~# '''echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce'''
 
 
'''Note: If the ifconfig command is missing then install it by using:'''
# apt-get install net-tools


Add to '''/etc/rc.local''' to automatic load the loop back adapter:
Add to '''/etc/rc.local''' to automatic load the loop back adapter:
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=Testing the loop back adapter=
=Testing the loop back adapter=
 
<br>Switch off the first (Windows) client to make Linux as the only web server<br>
Switch off the first (Windows) client<br>
[[File:04-02-01-myLVSOff.png|640px]]<br><br>
[[File:04-02-01-myLVSOff.png|640px]]<br><br>
 
<br>The new myLVS overview should now show the disabled (Windows) server marked with a red cross:<br>
 
The new myLVS overview should now show the disabled server marked with a red cross:<br>
[[File:04-02-02-myLVS02on.png|640px]]<br><br>
[[File:04-02-02-myLVS02on.png|640px]]<br><br>


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There should be the Linux/Debian default web page<br>
There should be the Linux/Debian default web page<br>
[[File:04-01-01-DebianDefWeb.png|640px]]<br><br>
[[File:04-01-01-DebianDefWeb.png|640px]]<br><br>
=Where to go next=
<br>
*Go here: [[Setup summary]]

Latest revision as of 08:39, 5 August 2020

Linux Test setup, it has been tested on

  • Debian 8
  • Apache 2.4
  • Hostname used for the test: myLVS-LinuxClient




System settings to configure the loop back adapter

To make the change permanent you may edit /etc/sysctl.conf and add:

net.ipv4.conf.eth0.arp_ignore = 1
net.ipv4.conf.eth0.arp_announce = 2
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2

Apply:

sysctl -p

To make it applied immediately you can set:

root@myLVS-LinuxClient:~# echo "1" > /proc/sys/net/ipv4/conf/eth0/arp_ignore
root@myLVS-LinuxClient:~# echo "2" > /proc/sys/net/ipv4/conf/eth0/arp_announce
root@myLVS-LinuxClient:~# echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore
root@myLVS-LinuxClient:~# echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce


Note: If the ifconfig command is missing then install it by using:

# apt-get install net-tools

Add to /etc/rc.local to automatic load the loop back adapter:

/sbin/ifconfig lo:0 192.168.2.220 -arp netmask 255.255.255.255 up

ifconfig should look like:

root@myLVS-LinuxClient:~# ifconfig
eth0     Link encap:Ethernet  HWaddr 08:00:27:89:f3:8d
         inet addr:192.168.2.222  Bcast:255.255.255.255  Mask:255.255.255.0
         inet6 addr: fe80::a00:27ff:fe89:f38d/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:1646 errors:0 dropped:2 overruns:0 frame:0
         TX packets:356 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000
         RX bytes:153233 (149.6 KiB)  TX bytes:105801 (103.3 KiB)
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:65536  Metric:1
         RX packets:32 errors:0 dropped:0 overruns:0 frame:0
         TX packets:32 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0
         RX bytes:1920 (1.8 KiB)  TX bytes:1920 (1.8 KiB)
lo:0     Link encap:Local Loopback
         inet addr:192.168.2.220  Mask:255.255.255.255
         UP LOOPBACK RUNNING  MTU:65536  Metric:1

Testing the loop back adapter


Switch off the first (Windows) client to make Linux as the only web server



The new myLVS overview should now show the disabled (Windows) server marked with a red cross:


Use a network client and open the URL http://192.168.2.220, we should now see the result of web02 (because web01 is off)
There should be the Linux/Debian default web page


Where to go next