[Bug 893450] Re: KVM guest fails to autostart sometimes with virSecurityDACRestoreSecurityFileLabel error

[Serge Hallyn]

Thanks for submitting this bug.  I'm marking it high priority as it fits
'severe impact on a small number of users'.

The problem appears to be that the logical volume is slow in coming up,
such that libvirt starts before the udev creates its device node.
Working around this in your particular case should be pretty easy, but a
general fix will be harder.

To work around it in your case, please try adding the following to your
/etc/init/libvirt-bin.conf file, at the end of the 'pre-start script'
section:

   while [ ! -e /dev/vg_default/lv_robot-pv0 ]; do
      sleep 1s
   done

So, for instance, the pre-start script section would probably become:

pre-start script
	[ -r /etc/default/libvirt-bin ] && . /etc/default/libvirt-bin
	[ ! "x$start_libvirtd" = "xyes" ] && { stop; exit 0; }
	mkdir -p /var/run/libvirt
	# Clean up a pidfile that might be left around
	rm -f /var/run/libvirtd.pid
	date >> /var/log/libvirt-upstart
	echo $$ >> /var/log/libvirt-upstart
	cat /proc/self/cmdline >> /var/log/libvirt-upstart
	cat /proc/self/cgroup >> /var/log/libvirt-upstart
	while [ ! -e /dev/vg_default/lv_robot-pv0 ]; do
		sleep 1s
	done
end script

Please let us know if that does not work around your problem for now.

** Changed in: libvirt (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/893450

Title:
  KVM guest fails to autostart sometimes with
  virSecurityDACRestoreSecurityFileLabel error

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