ubuntu-xen-server installs, but complains that it needs Python 2.5 in Jaunty

[Shane D]

Information:
Jaunty Server 9.04 Beta
Arch: i386, amd64

When installing the ubuntu-xen-server package, it succeeds without error, but the moment that I run xm, it complains that it can't find /usr/bin/python2.5. Immediately after installing Jaunty Server Beta, I noticed there was an upgrade to python, which I applied, so I'm assuming something about the python 2.6 upgrade broke this.

--
Shane

[Shane D (dimensional)]

Running "sudo aptitude install python2.5" would obviously fix that problem, but I also noticed that the xen kernel never gets installed either. Just seems like the default dependencies are a little messed up in Jaunty Server Beta.

[Todd Deshane (deshantm)]

There hasn't been a linux-xen kernel since 8.04, hardy. The hardy kernel should work fine for your Xen kernel though.

The intrepid xen hypervisor was backpored to hardy see:
http://bderzhavets.wordpress.com/2008/11/13/backport-intrepid-xen-33-hypervisor-at-ubuntu-hardy-dom0-2624-21-xen/

Maybe somebody will backport the xen hypervisor, etc. that is in Jaunty.

In any case, this bug is a duplicate and will be marked as won't fix until xen dom0 get's into mainline.
for updates on the status follow:
http://wiki.xensource.com/xenwiki/XenParavirtOps

[Brett Sheffield (brett-gladserv)]

Same problem on Jaunty Server RC on amd64.

python2.5 not installed with ubuntu-xen-server

However, installing it does not solve the problem:

root@gill:~# xm li
ERROR Internal error: Could not obtain handle on privileged command interface (2 = No such file or directory)
Traceback (most recent call last):
  File "/usr/sbin/xm", line 8, in <module>
    from xen.xm import main
  File "/usr/lib/python2.5/site-packages/xen/xm/main.py", line 61, in <module>
    xc = xen.lowlevel.xc.xc()
xen.lowlevel.xc.Error: (1, 'Internal error', 'Could not obtain handle on privileged command interface (2 = No such file or directory)')

[Brett Sheffield (brett-gladserv)]

This is the lack of a Xen kernel again:

root@gill:~# uname -a
Linux gill 2.6.28-11-server #42-Ubuntu SMP Fri Apr 17 02:45:36 UTC 2009 x86_64 GNU/Linux

So, Ubuntu's not had a xen kernel since 8.04 (a year). If installing the one from Hardy works, then why is this not packaged as the default?

There is an expectation that installing ubuntu-xen-server will result in a working xen setup. By leaving broken dependencies (no xen kernel, and python2.5 missing) ubuntu is surprising it's users unecessarily.

There are two paths to fix this:

1) fix the dependencies

or

2) remove the ubuntu-xen-server package completely and the broken promise it represents.

Right now, I've got a choice of going back to 8.04 LTS where there are other very old bugs like
 #235773 Virt-install fails on Ubuntu 8.04 Desktop Dom0 (amd64)

awaiting attention, or to try and cobble something together in Jaunty. I'd rather put my efforts towards supporting the new release I think.

Who's working on this, and can I get involved? I need it fixed and I'm willing to help.