[ovirt-users] Data Center Contending/Non responsive - No SPM

[Matthew B]

Hello,

I'm having a problem with oVirt - we're running 4.3 on CentOS 7:

[root@ovirt ~]# rpm -q ovirt-engine; uname -r
ovirt-engine-4.3.4.3-1.el7.noarch
3.10.0-957.21.2.el7.x86_64

Currently the Data Center alternates between Non responsive and contending
status, and SPM selection fails.
The error in the events tab is:

VDSM compute5.domain command HSMGetTaskStatusVDS failed: Volume does not
exist: (u'2bffb8d0-dfb5-4b08-9c6b-716e11f280c2',)

Full error:

2019-08-21 13:53:53,507-0700 ERROR (tasks/8) [storage.TaskManager.Task]
(Task='3076bb8c-7462-4573-a832-337da478ae0e') Unexpected error (task:875)
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/vdsm/storage/task.py", line 882,
in _run
return fn(*args, **kargs)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/task.py", line 336,
in run
return self.cmd(*self.argslist, **self.argsdict)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/sp.py", line 333, in
startSpm
self._upgradePool(expectedDomVersion, __securityOverride=True)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/securable.py", line
79, in wrapper
return method(self, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/sp.py", line 484, in
_upgradePool
str(targetDomVersion))
  File "/usr/lib/python2.7/site-packages/vdsm/storage/sp.py", line 1108, in
_convertDomain
targetFormat)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/formatconverter.py",
line 447, in convert
converter(repoPath, hostId, imageRepo, isMsd)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/formatconverter.py",
line 405, in v5DomainConverter
domain.convert_volumes_metadata(target_version)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/fileSD.py", line 813,
in convert_volumes_metadata
for vol in self.iter_volumes():
  File "/usr/lib/python2.7/site-packages/vdsm/storage/sd.py", line 764, in
iter_volumes
yield self.produceVolume(img_id, vol_id)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/sd.py", line 846, in
produceVolume
volUUID)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/glusterVolume.py",
line 45, in __init__
volUUID)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py", line 817,
in __init__
self._manifest = self.manifestClass(repoPath, sdUUID, imgUUID, volUUID)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/fileVolume.py", line
71, in __init__
volUUID)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py", line 86,
in __init__
self.validate()
  File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py", line 112,
in validate
self.validateVolumePath()
  File "/usr/lib/python2.7/site-packages/vdsm/storage/fileVolume.py", line
131, in validateVolumePath
raise se.VolumeDoesNotExist(self.volUUID)
VolumeDoesNotExist: Volume does not exist:
(u'2bffb8d0-dfb5-4b08-9c6b-716e11f280c2',)

Most of our VMs are still running, but we can't start or restart any VMs.
All of the domains show as down since SPM selection fails. Any thoughts?

Thanks,
 -Matthew
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[ovirt-users] How to keep VM running when a storage domain is offline

[Matthew B]

Hello,

I am trying to understand how I can prevent a VM from being paused when one
of it's disks is unavailable due to a problem with the storage domain.

The scenario:

A VM with 3 disks. OS disk on a highly available domain. And Two large
disks each on separate domains. (so a total of 3 domains).

The two large disks are mirrored using ZFS - but when one of the storage
domains goes down the VM pauses. Is is possible to configure the VM to not
pause when certain storage domains are unavailable? So instead of getting
Paused due to IO error the disk would just be missing until that domain was
brought back online?

Thanks,
 -Matthew
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