This page is part of my webdevster.com tutorial, see index to OpenQRM and XEN LVM based HVM VM.

[2.2] Step 2. Install XEN and configure

Installing the XEN hypervisor, is easy and pretty straight forward, as there are many tutorials online on how to install Xen on many different distributions. However, I suggest you read on, because there are stages in this section which describe how to prepare for integrating Xen VM with OpenQRM.

See what Kernels are available for this distribution. Of course you can run the same command to find out what Xen kernel are available on other Debian like distributions, i.e. Ubuntu.

Check out which kernel you have:

So we’ll install XEN with matching kernels. This will also install other XEN packages related for you, i.e. linux-image-2.6.26-2-xen-amd64 linux-modules-2.6.26-2-xen-amd64 xen-hypervisor-3.2-1-amd64 xen-utils-3.2-1 xen-utils-common xenstore-utils

Verify XEN kernel is in the GRUB loader

Verify Kernel

Verify Grub

  title           Xen 3.2-1-amd64 / Debian GNU/Linux, kernel 2.6.26-2-xen-amd64
  root            (hd0,0)
  kernel          /boot/xen-3.2-1-amd64.gz
  module          /boot/vmlinuz-2.6.26-2-xen-amd64 root=/dev/sdb1 ro console=tty0
  module          /boot/initrd.img-2.6.26-2-xen-amd64

NOTE:
In my case the Xen installer overwrote all my entries in the grub loader, as noted above :< So I had to change all the boot devices from sdb to sda, this is a bug in Xen, debian, or IBM (don't know); IBM blades are not supported by Debian and vise versa, therefore until IBM decides to support Debian, I have to make changes as they come. You might need to do similar changes, also depending on your server hardware vendor, i.e. dell. In my experience most of Dell's server rated hardware, have less compatibility issues with Debian. Anyways here is the updated correct file, nano /boot/grub/menu.lst. Also don’t forget the nano /etc/fstab.

Configure XEN Loop

Verify and add if not there:

loop max_loop=64

Edit XEN config file, reboot, and verify Xen Kernel running.

Change this:

#(xend-http-server no)

to this:

(xend-http-server yes)

Change this:

#(xend-unix-server no)

to this:

(xend-http-server yes)

Change this:

#(network-script network-bridge)

to this:

(network-script network-bridge)

Change this:

(network-script network-dummy)

to this:

#(network-script network-dummy)

Verify:

(vif-script vif-bridge)

is uncommented

Change this:

#(vnc-listen '127.0.0.1')

to this:

(vnc-listen '0.0.0.0')

Change this:

(vncpasswd '')

to this:

(vncpasswd 'SOMEVNCPASSWORD')

Save it, and reboot.

Now check your shiny Xen kernel

NOTE:
If you get error on startup:
Waiting for root filesystem, after installing.
Once your Grub Menu shows on boot, press E on selected following line:
Xen 3.2-1-amd64 / Debian GNU/Linux, kernel 2.6.26-2-xen-amd64
See Image:
Then press E on selected following line:
/boot/vmlinuz-2.6.26-2-xen-amd64 root=/dev/sdb1 ro console=tty0
Remove:
console=tty0
Press Enter
Press B on selected following line:
Xen 3.2-1-amd64 / Debian GNU/Linux, kernel 2.6.26-2-xen-amd64

Once it boots into system, make sure to fix this permanently by

Another solution might be to disable the CDROM attached to system, via bios, before boot.

Now that we have finished the Xen Host Installation, we can move on to installing VNC Server, in the next page 7, Step 3. Install VNC and configure.

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