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Bug 1175234 - virDomainGetSchedulerParameters() fails with Unable to read from '/sys/fs/cgroup/cpu,cpuacct/machine.slice/machine-qemu\x2dMic2.scope/cpu.shares': No such file or directory
virDomainGetSchedulerParameters() fails with Unable to read from '/sys/fs/cgr...
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: libvirt (Show other bugs)
7.0
x86_64 Linux
unspecified Severity urgent
: rc
: ---
Assigned To: Libvirt Maintainers
Virtualization Bugs
sla
: TestOnly
Depends On: 1139223
Blocks: 1156399
  Show dependency tree / graph
 
Reported: 2014-12-17 05:54 EST by Martin Sivák
Modified: 2015-03-05 02:48 EST (History)
20 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: 1156399
Environment:
Last Closed: 2015-03-05 02:48:18 EST
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
relevant logs (2.35 MB, application/x-gzip)
2014-12-17 07:00 EST, Michael Burman 		no flags Details
Add an attachment (proposed patch, testcase, etc.)


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:0323 normal SHIPPED_LIVE Low: libvirt security, bug fix, and enhancement update 2015-03-05 07:10:54 EST

  None (edit)
Description Martin Sivák 2014-12-17 05:54:35 EST 
+++ This bug was initially created as a clone of Bug #1156399 +++

Traceback (most recent call last):
  File "/usr/share/vdsm/virt/sampling.py", line 471, in collect
    statsFunction()
  File "/usr/share/vdsm/virt/sampling.py", line 346, in __call__
    retValue = self._function(*args, **kwargs)
  File "/usr/share/vdsm/virt/vm.py", line 349, in _sampleCpuTune
    infos = self._vm._dom.schedulerParameters()
  File "/usr/share/vdsm/virt/vm.py", line 689, in f
    ret = attr(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line 111, in wrapper
    ret = f(*args, **kwargs)
  File "/usr/lib64/python2.7/site-packages/libvirt.py", line 2134, in schedulerParameters
    if ret is None: raise libvirtError ('virDomainGetSchedulerParameters() failed', dom=self)
libvirtError: Unable to read from '/sys/fs/cgroup/cpu,cpuacct/machine.slice/machine-qemu\x2dMic2.scope/cpu.shares': No such file or directory

This issue currently blocks RHEV-M 3.5 release.
Comment 1 Martin Sivák 2014-12-17 05:56:40 EST 
mpavlik: Can you please add the versions of libvirt and systemd here? I suspect that it is related to those two components somehow.
Comment 3 Daniel Berrange 2014-12-17 06:05:08 EST 
This is probably just another case of systemd deleting libvirt's cgroups

https://bugzilla.redhat.com/show_bug.cgi?id=1139223
Comment 4 Michael Burman 2014-12-17 06:56:41 EST 
libvirt-daemon-1.1.1-29.el7_0.3.x86_64
systemd-python-208-11.el7_0.5.x86_64
Comment 5 Michael Burman 2014-12-17 07:00:04 EST 
Created attachment 970071 [details]
relevant logs
Comment 6 Martin Pavlik 2014-12-17 07:20:16 EST 
I think comment 3 is right

if node was freshly booted vNIC could be linked down and up, after vdsm restart problem occured

Thread-19::ERROR::2014-12-17 12:43:12,404::sampling::475::vm.Vm::(collect) vmId=`32752ba3-ee24-4bd8-931c-d7cf5fe361e7`::Stats function failed: <AdvancedStatsFunction _sampleCpu at 0x2e2a720>
Traceback (most recent call last):
  File "/usr/share/vdsm/virt/sampling.py", line 471, in collect
    statsFunction()
  File "/usr/share/vdsm/virt/sampling.py", line 346, in __call__
    retValue = self._function(*args, **kwargs)
  File "/usr/share/vdsm/virt/vm.py", line 303, in _sampleCpu
    cpuStats = self._vm._dom.getCPUStats(True, 0)
  File "/usr/share/vdsm/virt/vm.py", line 689, in f
    ret = attr(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", line 111, in wrapper
    ret = f(*args, **kwargs)
  File "/usr/lib64/python2.7/site-packages/libvirt.py", line 2016, in getCPUStats
    if ret is None: raise libvirtError ('virDomainGetCPUStats() failed', dom=self)
libvirtError: unable to get cpu account: Operation not permitted


[root@dell-r210ii-06 ~]# rpm -qa | grep libvirt
libvirt-python-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-driver-secret-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-driver-qemu-1.1.1-29.el7_0.3.x86_64
libvirt-client-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-driver-nwfilter-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-driver-interface-1.1.1-29.el7_0.3.x86_64
libvirt-lock-sanlock-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-config-nwfilter-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-driver-network-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-driver-storage-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-driver-nodedev-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-kvm-1.1.1-29.el7_0.3.x86_64
[root@dell-r210ii-06 ~]# rpm -qa | grep systemd
systemd-208-11.el7_0.5.x86_64
systemd-libs-208-11.el7_0.5.x86_64
systemd-sysv-208-11.el7_0.5.x86_64
Comment 7 Jiri Denemark 2014-12-18 04:17:03 EST 
There should be no libvirt work required once the systemd bug 1139223 is fixed.
Comment 8 Shanzhi Yu 2015-01-06 01:58:24 EST 
I can reproduce it with systemd-208-12.el7.x86_64

Steps as below:

# rpm -qa|grep systemd
systemd-python-208-12.el7.x86_64
systemd-208-12.el7.x86_64
systemd-libs-208-12.el7.x86_64
systemd-sysv-208-12.el7.x86_64
systemd-devel-208-12.el7.x86_64

# rpm -q libvirt
libvirt-1.2.8-10.el7.x86_64

1. Start a domain
# virsh start rh7 
Domain rh7 started

2. Check cgroup dir used by libvirtd 
## for i in cpuset cpu,cpuacct memory devices freezer net_cls blkio perf_event;do file /sys/fs/cgroup/$i/machine.slice/machine-qemu\\x2drh7.scope;done 
/sys/fs/cgroup/cpuset/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/cpu,cpuacct/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/memory/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/devices/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/freezer/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/net_cls/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/blkio/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/perf_event/machine.slice/machine-qemu\x2drh7.scope: directory

3. Reload systemd service and restart libvirtd service
# systemctl daemon-reload ;systemctl restart libvirtd.service

4. Check sub cgroup dir used by libvirtd 

# for i in cpuset cpu,cpuacct memory devices freezer net_cls blkio perf_event;do file /sys/fs/cgroup/$i/machine.slice/machine-qemu\\x2drh7.scope;done 
/sys/fs/cgroup/cpuset/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/cpu,cpuacct/machine.slice/machine-qemu\x2drh7.scope: cannot open (No such file or directory)
/sys/fs/cgroup/memory/machine.slice/machine-qemu\x2drh7.scope: cannot open (No such file or directory)
/sys/fs/cgroup/devices/machine.slice/machine-qemu\x2drh7.scope: cannot open (No such file or directory)
/sys/fs/cgroup/freezer/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/net_cls/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/blkio/machine.slice/machine-qemu\x2drh7.scope: cannot open (No such file or directory)
/sys/fs/cgroup/perf_event/machine.slice/machine-qemu\x2drh7.scope: directory

So, sub cgroup blkio devices memory cpu,cpuacct used by libvirtd were deleted when reload systemd

Verify this with systemd-208-20.el7.x86_64

1. # rpm -q systemd
systemd-208-20.el7.x86_64

2. # virsh start rh7 
Domain rh7 started

3. # for i in cpuset cpu,cpuacct memory devices freezer net_cls blkio perf_event;do file /sys/fs/cgroup/$i/machine.slice/machine-qemu\\x2drh7.scope;done 
/sys/fs/cgroup/cpuset/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/cpu,cpuacct/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/memory/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/devices/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/freezer/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/net_cls/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/blkio/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/perf_event/machine.slice/machine-qemu\x2drh7.scope: directory

4. # systemctl daemon-reload ;systemctl restart libvirtd.service

# for i in cpuset cpu,cpuacct memory devices freezer net_cls blkio perf_event;do file /sys/fs/cgroup/$i/machine.slice/machine-qemu\\x2drh7.scope;done 
/sys/fs/cgroup/cpuset/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/cpu,cpuacct/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/memory/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/devices/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/freezer/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/net_cls/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/blkio/machine.slice/machine-qemu\x2drh7.scope: directory
/sys/fs/cgroup/perf_event/machine.slice/machine-qemu\x2drh7.scope: directory
Comment 10 errata-xmlrpc 2015-03-05 02:48:18 EST 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2015-0323.html
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