LIBVIRT_DEFAULT_URI is not set for VirtualPowerDriver connections

[Imre Farkas]

On Fedora the default LIBVIRT_DEFAULT_URI is "qemu://session". It has many limitations [1], so it's better to set it to the default system URI which is "qemu://system" as the devtest guide suggests. The problem is that it's not permanent, so when seed-vm/undercloud-vm makes a connection to the host, it uses a different libvirt uri. As a consequence, 'heat stack-create undercloud/overcloud' fails.

A solution could be either:
1, the devtest guide should include a step on how to set it permanently for the user or systemwide. (eg. in /etc/profile.d/virsh.sh)
2, VirtualPowerDriver should set LIBVIRT_DEFAULT_URI when connecting

[1] http://wiki.libvirt.org/page/FAQ#What_is_the_difference_between_qemu:.2F.2F.2Fsystem_and_qemu:.2F.2F.2Fsession.3F_Which_one_should_I_use.3F

[Ghe Rivero (ghe.rivero)]

Similar bug: https://bugs.launchpad.net/tripleo/+bug/1226310
Looks like this issue is not resolved.