Public bug reported:
Starting with 12.10 the libvirt communications mechanism uses the
"XDG_RUNTIME_DIR" environment variable to determine the directory to put
in its pipe(s) and controlling files - this normally being
"/run/usr/$USER".
Now when you run a qemu user(!) session (qemu:///session) an a
'libvirtd'-process owned by the user hasn't already be spawned - e.g.
manually - libvirt0 will spawn one itself. When manually spawned from a
terminal window, "XDG_RUNTIME_DIR" is properly set up and everything
works well with libvirtd. When libvirt0 spawns the libvirtd, it will use
$HOME/.cache/libvirt/qemu/run, the previous (up to and including 12.04)
location for this, because this is seems to be its fallback-default.
Thus when you start such a session with "virsh -c qemu:///session" or
vitual-manager, respectively, it will fail, saying
error: Failed to connect socket to '/run/user/me/libvirt/libvirt-sock': No such
file or directory
error: failed to connect to the hypervisor
in the former case.
Either "XDG_RUNTIME_DIR" is not properly set when libvirt spawns
libvirtd, or it is not respected. My assumption is the former, as
"XDG_RUNTIME_DIR" seems to be set by some 'pam'-module, that probably
isn't used when libvirt exececutes libvirtd.
As a workaround one can set "XDG_RUNTIME_DIR=.cache" in the environment
calling "virsh" or "virtual-manager", the everything uses the old/former
settings and works.
The problem seems to be to tell libvirt about the proper
"XDG_RUNTIME_DIR" contents or make it the new default.
The way it is now, qemu-user-sessions will just fail when started by
virsh or virt-manager.
By the way, you can test it even with a 'live'-system (USB/DVD) by just
adding the libvirt-bin and/or virt-manager packages, thus it is not
dependent on the version of the packages installed on the actual system.
Nevertheless as I can't see if that information is attached otherwise, here are
the system data you require:
Description: Ubuntu 12.10
Release: 12.10
libvirt0:
Installed: 0.9.13-0ubuntu12
Candidate: 0.9.13-0ubuntu12
Version table:
*** 0.9.13-0ubuntu12 0
500 http://de.archive.ubuntu.com/ubuntu/ quantal/main i386 Packages
100 /var/lib/dpkg/status
Best regards.
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: libvirt0 0.9.13-0ubuntu12
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu6
Architecture: i386
Date: Fri Nov 2 17:13:51 2012
InstallationDate: Installed on 2011-03-05 (608 days ago)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007.1)
MarkForUpload: True
SourcePackage: libvirt
UpgradeStatus: Upgraded to quantal on 2012-10-26 (6 days ago)
** Affects: libvirt (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 quantal running-unity
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1074418
Title:
qemu:///sessions fail, when libvirtd hasn't been started properly
before
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1074418/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
