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The Contrail testbed currently consists of a two DAS-3 machines running Debian (Lenny) Linux and configured for Xen.

== Testbed machines ==

* node058.das3.cs.vu.nl
* node059.das3.cs.vu.nl

== IP addresses for VMs ==

Currently we can start up to 4 VMs with public IP addresses. We also have DNS domain names associated with these addresses.
Here are the allocated IP addresses, MAC addresses and DNS names:

{| border="1"
|'''Host''' || '''MAC address''' || '''IP address'''
|- 
|xen01.das3.cs.vu.nl || 00:16:3e:00:00:01 || 130.37.197.11
|-
|xen02.das3.cs.vu.nl || 00:16:3e:00:00:02 || 130.37.197.12
|-
|xen03.das3.cs.vu.nl || 00:16:3e:00:00:03 || 130.37.197.13
|-
|xen04.das3.cs.vu.nl || 00:16:3e:00:00:04 || 130.37.197.14
|}

You can use these settings to configure your VM images.

== Rebooting the machines ==

Grub is configured on these machines to start by default the regular Linux kernel. If you want to reboot them with the Xen-enabled
kernel, run this command:

<code>grub-reboot 0</code>

== Creating your own VM images ==

If you want to experiment with your own VM, you first have to create an image. A sample command for doing this is the following:

<code>xen-create-image --output /home/cstratan --hostname xen01.das3.cs.vu.nl --mac 00:16:3e:00:00:01 --ip 130.37.197.11 --netmask 255.255.255.0 --broadcast130.37.197.255 --gateway 130.37.197.1 --dist lenny --dir /home/cstratan</code>

'''Note: Be careful to change the --output and --dir arguments, because otherwise you might overwrite the images created by other users.'''

After this command, there will be a configuration file named <code>xen01.das3.cs.vu.nl.cfg</code> created in the directory you specified with the <code>--output</code> argument. Also, the image files for this domain will be created under the directory specified with the <code>--dir</code> argument (in a subdirectory named <code>domains</code>).

In order to be able to connect with the console to your VM, edit the configuration file and add the following line:

<code>extra = 'console=hvc0 xencons=tty'</code>

Now you can start your VM (and use its console) with the following command:

<code>xm create xen01.das3.cs.vu.nl.cfg -c</code>

After the VM boots, you will get a console where you will be able to login as root, without a password (of course you might want to change that).

To shutdown the domain, use this command from another terminal:

<code>xm shutdown xen01.das3.cs.vu.nl</code>

If you want to be able to connect with ssh to your VM, install udev (from the console) and then restart the VM:

<code>apt-get install udev</code>

== Using the existing VM images ==
If you just want to try starting a VM with <code>xm create</code>, you can use some images that were already generated. You will find some <code>xen0x.das3.cs.vu.nl.cfg</code> config files under the <code>/etc/xen</code> directory, and the image files under the <code>/home/xen</code> directory.

Return to Contrail Testbed.

Retrieved from "https://wiki.cs.vu.nl/xtreemos/Contrail_Testbed"

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