Bug 1810605

Summary: Errors upon VM start "Requested operation is not valid: cgroup CPU controller is not mounted"
Product: [oVirt] ovirt-engine Reporter: Polina <pagranat>
Component: BLL.VirtAssignee: Ryan Barry <rbarry>
Status: CLOSED CURRENTRELEASE QA Contact: Polina <pagranat>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 4.4.0CC: bugs, michal.skrivanek
Target Milestone: ovirt-4.4.0Flags: pm-rhel: ovirt-4.4+
Target Release: ---   
Hardware: x86_64   
OS: Linux   
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Last Closed: 2020-05-20 20:04:05 UTC Type: Bug
Regression: --- Mount Type: ---
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oVirt Team: Virt RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 1808940    
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Description Polina 2020-03-05 15:00:48 UTC 
Created attachment 1667797 [details]
logs

Description of problem:vdsm.log reports CPU controller errors even if the VM is started.

Version-Release number of selected component (if applicable):
http://bob-dr.lab.eng.brq.redhat.com/builds/4.4/rhv-4.4.0-23

How reproducible: always

Steps to Reproduce:
1. Create VM on the base of latest-rhel-guest-image-8.1-infra template.
2. Run-once on host 

Actual results: VM starts though in vdsm there are a lot of errors reported :

020-03-05 16:39:15,077+0200 ERROR (jsonrpc/6) [virt.vm] (vmId='44db4be9-a5a5-491d-b254-7036a5a704e8') Operation failed (vm:4788)
Traceback (most recent call last):
  File "/usr/lib/python3.6/site-packages/vdsm/virt/vm.py", line 4765, in setCpuTunePeriod
    self._dom.setSchedulerParameters({'vcpu_period': int(period)})
  File "/usr/lib/python3.6/site-packages/vdsm/virt/virdomain.py", line 101, in f
    ret = attr(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/vdsm/common/libvirtconnection.py", line 131, in wrapper
    ret = f(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/vdsm/common/function.py", line 94, in wrapper
    return func(inst, *args, **kwargs)
  File "/usr/lib64/python3.6/site-packages/libvirt.py", line 2555, in setSchedulerParameters
    if ret == -1: raise libvirtError ('virDomainSetSchedulerParameters() failed', dom=self)
libvirt.libvirtError: Requested operation is not valid: cgroup CPU controller is not mounted
2020-03-05 16:39:15,077+0200 INFO  (jsonrpc/6) [api.virt] FINISH setCpuTunePeriod return={'status': {'code': 62, 'message': 'Requested operation is not valid: cgroup CPU controller is not mounted'}} from=::1,60536, vmId=44db4be9-a5a5-491d-b254-7036a5a704e8 (api:54)


Expected results: no libvirt errors on VM start


Additional info:
Comment 1 Michal Skrivanek 2020-03-06 10:22:54 UTC 
thanks to phrdina's investigation, this is bug 1808940
Comment 2 Polina 2020-03-29 19:42:04 UTC 
verified in http://bob-dr.lab.eng.brq.redhat.com/builds/4.4/rhv-4.4.0-27
Comment 3 Sandro Bonazzola 2020-05-20 20:04:05 UTC 
This bugzilla is included in oVirt 4.4.0 release, published on May 20th 2020.

Since the problem described in this bug report should be
resolved in oVirt 4.4.0 release, it has been closed with a resolution of CURRENT RELEASE.

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