Comment 1 for bug 927478

I forgot to add, the workaround is to change the value of "--root_helper" in nova.conf as follows (so that it is using just "sudo"):

#--root_helper=sudo nova-rootwrap
--root_helper=sudo

And place the following line in sudoers (not secure, but OK in the particular R&D I am running at the moment):
nova ALL=(ALL) NOPASSWD: ALL

This system is Ubuntu 11.10x64 running trunk PPA's.

Hoping this helps others til the guru can finalise the superior "sudo nova-rootwrap" method.

Cheers,

Paul