[Pkg-libvirt-maintainers] Bug#774237: libvirt-bin: lxc domains lost after upgrade/restart of libvirt

[Guido Günther]

Hi,
On Wed, Dec 31, 2014 at 01:15:09AM +0800, gustavo panizzo (gfa) wrote:
> Package: libvirt-bin
> Version: 1.2.9-7
> Severity: important
> 
> almost every time i upgrade libvirt-bin i lost my running lxc
> domain(s).

This is due to libvirt not finding the cgroups anymore when the daemon
is started via systemd:

 debug : virCgroupDetectPlacement:513 : Detecting placement for pid 2574 path
 debug : virCgroupDetect:701 : Detected mount/mapping 0:cpu at /sys/fs/cgroup/cpu,cpuacct in / for pid 2574
 debug : virCgroupDetect:701 : Detected mount/mapping 1:cpuacct at /sys/fs/cgroup/cpu,cpuacct in / for pid 2574
 debug : virCgroupDetect:701 : Detected mount/mapping 2:cpuset at /sys/fs/cgroup/cpuset in /machine.slice/machine-lxc\x2dtest2.scope for pid 2574
 debug : virCgroupDetect:701 : Detected mount/mapping 3:memory at /sys/fs/cgroup/memory in / for pid 2574
 debug : virCgroupDetect:701 : Detected mount/mapping 4:devices at /sys/fs/cgroup/devices in /system.slice/libvirtd.service for pid 2574
 debug : virCgroupDetect:701 : Detected mount/mapping 5:freezer at /sys/fs/cgroup/freezer in /machine.slice/machine-lxc\x2dtest2.scope for pid 2574
 debug : virCgroupDetect:701 : Detected mount/mapping 6:blkio at /sys/fs/cgroup/blkio in / for pid 2574
 debug : virCgroupDetect:701 : Detected mount/mapping 7:net_cls at /sys/fs/cgroup/net_cls in /machine.slice/machine-lxc\x2dtest2.scope for pid 2574
 debug : virCgroupDetect:701 : Detected mount/mapping 8:perf_event at /sys/fs/cgroup/perf_event in /machine.slice/machine-lxc\x2dtest2.scope for pid 2574
 debug : virCgroupDetect:701 : Detected mount/mapping 9:name=systemd at /sys/fs/cgroup/systemd in /system.slice/libvirtd.service for pid 2574
 debug : virCgroupValidateMachineGroup:298 : Name '' for controller 'cpu' does not match 'test2', 'test2.libvirt-lxc' or 'machine-lxc\x2dtest2.scope'
 debug : virCgroupNewDetectMachine:1508 : Failed to validate machine name for 'test2' driver 'lxc'
 error : virLXCProcessReconnectDomain:1528 : internal error: No valid cgroup for machine test2

While it should look like

 debug : virCgroupDetectPlacement:513 : Detecting placement for pid 4052 path
 debug : virCgroupDetect:701 : Detected mount/mapping 0:cpu at /sys/fs/cgroup/cpu,cpuacct in /machine.slice/machine-lxc\x2dtest.scope for pid 4052
 debug : virCgroupDetect:701 : Detected mount/mapping 1:cpuacct at /sys/fs/cgroup/cpu,cpuacct in /machine.slice/machine-lxc\x2dtest.scope for pid 4052
 debug : virCgroupDetect:701 : Detected mount/mapping 2:cpuset at /sys/fs/cgroup/cpuset in /machine.slice/machine-lxc\x2dtest.scope for pid 4052
 debug : virCgroupDetect:701 : Detected mount/mapping 3:memory at /sys/fs/cgroup/memory in /machine.slice/machine-lxc\x2dtest.scope for pid 4052
 debug : virCgroupDetect:701 : Detected mount/mapping 4:devices at /sys/fs/cgroup/devices in /machine.slice/machine-lxc\x2dtest.scope for pid 4052
 debug : virCgroupDetect:701 : Detected mount/mapping 5:freezer at /sys/fs/cgroup/freezer in /machine.slice/machine-lxc\x2dtest.scope for pid 4052
 debug : virCgroupDetect:701 : Detected mount/mapping 6:blkio at /sys/fs/cgroup/blkio in /machine.slice/machine-lxc\x2dtest.scope for pid 4052
 debug : virCgroupDetect:701 : Detected mount/mapping 7:net_cls at /sys/fs/cgroup/net_cls in /machine.slice/machine-lxc\x2dtest.scope for pid 4052
 debug : virCgroupDetect:701 : Detected mount/mapping 8:perf_event at /sys/fs/cgroup/perf_event in /machine.slice/machine-lxc\x2dtest.scope for pid 4052
 debug : virCgroupDetect:701 : Detected mount/mapping 9:name=systemd at /sys/fs/cgroup/systemd in /system.slice/libvirtd.service for pid 4052

I can keep the lxc containers running when starting libvirtd as
'libvirtd -d' intead of using systemctl. Since it works on Fedora I need
to check with a more recent systemd....
Cheers,
 -- Guido