[Pkg-libvirt-maintainers] Bug#707201: Same problem

[Edward J. Shornock]

* Guido Günther <agx at sigxcpu.org> [15-06-2013 16:26 EEST]:
> It would be awesome if you guys would provide some information to
> reproduce like:
> 
> * which version you were upgrading from

0.9.12-11 -> 1.0.5-3

> * which VMs were running

It happens when trying to create a new vm and also when trying to start an
already existing Wheezy VM.

> * content of /proc/mounts

rootfs / rootfs rw 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
udev /dev devtmpfs rw,relatime,size=10240k,nr_inodes=2046777,mode=755 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
tmpfs /run tmpfs rw,nosuid,noexec,relatime,size=1645588k,mode=755 0 0
[snipped hdd and other device mounts]
tmpfs /run/lock tmpfs rw,nosuid,nodev,noexec,relatime,size=5120k 0 0
tmpfs /run/shm tmpfs rw,nosuid,nodev,noexec,relatime,size=4267920k 0 0
fusectl /sys/fs/fuse/connections fusectl rw,relatime 0 0
cgroup /sys/fs/cgroup cgroup rw,relatime,perf_event,blkio,net_cls,freezer,devices,cpuacct,cpu,cpuset 0 0
rpc_pipefs /var/lib/nfs/rpc_pipefs rpc_pipefs rw,relatime 0 0
none /sys/kernel/security securityfs rw,relatime 0 0
nfsd /proc/fs/nfsd nfsd rw,relatime 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,nosuid,nodev,noexec,relatime 0 0
vmware-vmblock /run/vmblock-fuse fuse.vmware-vmblock rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other 0 0

> * contents of /sys/fs/cgroup before the upgrade

After the libvirt upgrade I have

blkio.io_merged                   blkio.io_service_time            blkio.sectors_recursive           blkio.time_recursive   cpuacct.usage_percpu            cpuset.memory_spread_page        devices.list
blkio.io_merged_recursive         blkio.io_service_time_recursive  blkio.throttle.io_service_bytes   blkio.weight           cpuset.cpu_exclusive            cpuset.memory_spread_slab        net_cls.classid
blkio.io_queued                   blkio.io_wait_time               blkio.throttle.io_serviced        blkio.weight_device    cpuset.cpus                     cpuset.mems                      notify_on_release
blkio.io_queued_recursive         blkio.io_wait_time_recursive     blkio.throttle.read_bps_device    cgroup.clone_children  cpuset.mem_exclusive            cpuset.sched_load_balance        release_agent
blkio.io_service_bytes            blkio.leaf_weight                blkio.throttle.read_iops_device   cgroup.event_control   cpuset.mem_hardwall             cpuset.sched_relax_domain_level  tasks
blkio.io_service_bytes_recursive  blkio.leaf_weight_device         blkio.throttle.write_bps_device   cgroup.procs           cpuset.memory_migrate           cpu.shares
blkio.io_serviced                 blkio.reset_stats                blkio.throttle.write_iops_device  cpuacct.stat           cpuset.memory_pressure          devices.allow
blkio.io_serviced_recursive       blkio.sectors                    blkio.time                        cpuacct.usage          cpuset.memory_pressure_enabled  devices.deny


I don't have the contents from before the upgrade.

> * libvirtd messages see:
> 
>     http://wiki.debian.org/libvirt/#Bugreports.2FDebugging
> 

Trying to start an existing VM in virt-manager:

2013-06-16 03:34:26,075 (engine:878): Starting vm 'wheezy'
2013-06-16 03:34:26,082 (asyncjob:184): Creating async job for function cb=<function tmpcb at 0x35ccb18>
2013-06-16 03:34:26,320 (error:80): dialog message: Error starting domain: Unable to initialize /machine cgroup: Invalid argument: Error starting domain: Unable to initialize /machine cgroup: Invalid argument

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 96, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 117, in tmpcb
    callback(*args, **kwargs)
  File "/usr/share/virt-manager/virtManager/domain.py", line 1160, in startup
    self._backend.create()
  File "/usr/lib/python2.7/dist-packages/libvirt.py", line 698, in create
    if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
libvirtError: Unable to initialize /machine cgroup: Invalid argument


Running libvirt in debug mode doesn't show anything more.

> I do think this is related to libvirtd changing cgroup layout but
> without any detail this is impossible to tell.

I think so too.
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