On Wed, Mar 09, 2016 at 01:01:40PM -0500, Lars Kellogg-Stedman wrote:
I ran into an odd problem today. I wanted to share it here in the hopes of maybe saving someone else some lost time.
When you run libvirtd as an unprivileged user (e.g., if you target qemu:///session from a non-root account), then libvirt will open a unix domain socket in one of two places:
- If XDG_RUNTIME_DIR is defined, then inside $XDG_RUNTIME_DIR/libvirt/libvirt-sock
- If XDG_RUNTIME_DIR is *not* defined, then inside $HOME/.cache/libvirt/libvirt-sock
With a CentOS 7 system, at least, if you ssh directly into an account, XDG_RUNTIME_DIR is set. But! If you `su -` to the account from root, e.g:
# su - stack
Then XDG_RUNTIME_DIR is *not* set. The problem is a little subtle, because most operations you will perform will work just fine in both cases: you can query for defined but not active guests, storagep pools, volumes, and so forth without a problem and you'll get the same answer.
IMHO this is a bug in the pam config. We really expect to see the same environment setup no matter how you login text console vs su vs ssh vs GDM. If that's not happening, its always going to cause bad behaviour across many apps, not only libvirt. Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|