= Notes from Upgrading to Ubuntu 12.04 from 10.04 =

== The new VMs ==

Upgraded the VM instance by swapping in an Ubuntu 10.04 image (the pre-upgrade version) and installing a new 12.04 i386 install.  Special things I did:

 * Used a hardware type that supports virtualization - {{{pc2133}}}
 * Used tb-allow-external to allow the Ubuntu install to proceed.  It expects external connectivity.
   * I added the Ubunutu 10.04 image to the list of images allowed to access external hosts temporarily to do this
 * The image file itself was created using

{{{
$ qemu-img create -f qcow2 /tmp/pangolin.img 10G
}}}

To do the install on an X window I needed to log into the DETER node hosting qemu using

{{{
$ ssh -Y pc055
}}}

Once I had a bootable image, I booted it, logged in, and changed {{{/etc/apt/sources.list}}} to point to scratch instead of the various ubuntu and cannonical sources.  After the substitutions there were 2 duplicates that I commented out. 

It's important to make the configuration user something that won't need to be overwritten by experiments.  I used {{{toor}}}, well after I remembereed this. 

The defaulty {{{/etc/resolve.conf}}} doesn't resolve scratch, so I copied one from the host on which QEMU was running.

After this {{{sudo apt-get update}}} succeeds.

Ubuntu doesn't enable sshd by default.  Be sure to:

{{{
$ apt-get install openssh-server
}}}

Shut down the VM and store the image on scratch

{{{
$ scp pangolin.img scratch:/var/www/benito
}}}

== QEMU software ==

The default Ubuntu QEMU install does not support VDE, which is clearly a problem.

This is easy enough to fix using the instructions for [http://www.debian-administration.org/articles/20 rebuilding a debina package]

 * apt-get the source for {{{qemu-kvm}}} and the supporting tools
 * modify {{{debian/rules}}} to include {{{--enable-vde}}} in the configure call
 * use debuild as above to make a new .deb