= 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

Move the debs - more than one gets created - into {{{/share/benito/packages/hv:qemu_packages}}} and adjust {{{/share/benito/etc/hv:qemu_packages}}} accordingly

There were custom debs for vde as well, but they are commented as fixing an overflow in i386.  This install is for amd64 so we'll try the stock vde packages.

The sources are in {{{~mikeryan/dev/benito/vde}}} but the changes were not completely clear.