Something weird is going on with our ovirt node 4.3.8 install mounting a nfs share.

We have a NFS domain for a couple of backup disks and we have a couple of 4.2 nodes connected to it.

Now I'm adding a fresh cluster of 4.3.8 nodes and the backupnfs mount doesn't work.

But somehow the node appears to thin thinks it's an LVM volume? It tries to find the VGs volume group but fails... which is not so strange as it is an NFS volume:

2020-02-05 14:17:54,190+0000 WARN (monitor/f5d2f7c) [storage.LVM] Reloading VGs failed (vgs=[u'f5d2f7c6-093f-46d6-a844-224d92db5ef9'] rc=5 out=[] err=[' Volume group "f5d2f7c6-093f-46d6-a844-224d92db5ef9" not found', ' Cannot process volume group f5d2f7c6-093f-46d6-a844-224d92db5ef9']) (lvm:470)
2020-02-05 14:17:54,201+0000 ERROR (monitor/f5d2f7c) [storage.Monitor] Setting up monitor for f5d2f7c6-093f-46d6-a844-224d92db5ef9 failed (monitor:330)
Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/vdsm/storage/monitor.py", line 327, in _setupLoop
    self._setupMonitor()
File "/usr/lib/python2.7/site-packages/vdsm/storage/monitor.py", line 349, in _setupMonitor
    self._produceDomain()
File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 159, in wrapper
    value = meth(self, *a, **kw)
File "/usr/lib/python2.7/site-packages/vdsm/storage/monitor.py", line 367, in _produceDomain
    self.domain = sdCache.produce(self.sdUUID)
File "/usr/lib/python2.7/site-packages/vdsm/storage/sdc.py", line 110, in produce
    domain.getRealDomain()
File "/usr/lib/python2.7/site-packages/vdsm/storage/sdc.py", line 51, in getRealDomain
    return self._cache._realProduce(self._sdUUID)
File "/usr/lib/python2.7/site-packages/vdsm/storage/sdc.py", line 134, in _realProduce
    domain = self._findDomain(sdUUID)
File "/usr/lib/python2.7/site-packages/vdsm/storage/sdc.py", line 151, in _findDomain
    return findMethod(sdUUID)
File "/usr/lib/python2.7/site-packages/vdsm/storage/sdc.py", line 176, in _findUnfetchedDomain
    raise se.StorageDomainDoesNotExist(sdUUID)
StorageDomainDoesNotExist: Storage domain does not exist: (u'f5d2f7c6-093f-46d6-a844-224d92db5ef9',)

The volume is actually mounted fine on the node:

On NFS server

Feb 5 15:47:09 back1en rpc.mountd[4899]: authenticated mount request from *.*.*.*:673 for /data/ovirt (/data/ovirt)

On the host

mount|grep nfs

*.*.*.*:/data/ovirt on /rhev/data-center/mnt/*.*.*.*:_data_ovirt type nfs (rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,soft,nolock,nosharecache,proto=tcp,timeo=600,retrans=6,sec=sys,mountaddr=*.*.*.*,mountvers=3,mountport=20048,mountproto=udp,local_lock=all,addr=*.*.*.*)

And I can see the files:

ls -alrt /rhev/data-center/mnt/*.*.*.*:_data_ovirt
total 4
drwxr-xr-x. 5 vdsm kvm    61 Oct 26 2016 1ed0a635-67ee-4255-aad9-b70822350706
-rwxr-xr-x. 1 vdsm kvm     0 Feb 5 14:37 __DIRECT_IO_TEST__
drwxrwxrwx. 3 root root   86 Feb 5 14:37 .
drwxr-xr-x. 5 vdsm kvm 4096 Feb 5 14:37 ..

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