Hey folks, quick (I hope) question: On my 3-node cluster I am swapping out all the SSDs with fewer but higher capacity ones. So I took one node down (maintenance, stop), then removed all SSDs, set up a new RAID, set up lvm and gluster, let it resync. Gluster health status shows no unsynced entries. Uppon going from maintenance to online from ovirt management It goes into non-operational status, vdsm log on the node shows: 2021-01-17 11:13:29,051+0100 INFO (jsonrpc/6) [api.host] START getAllVmStats() from=::1,48580 (api:48) 2021-01-17 11:13:29,051+0100 INFO (jsonrpc/6) [api.host] FINISH getAllVmStats return={'status': {'message': 'Done', 'code': 0}, 'statsList': (suppressed)} from=::1,48580 (api:54) 2021-01-17 11:13:29,052+0100 INFO (jsonrpc/6) [jsonrpc.JsonRpcServer] RPC call Host.getAllVmStats succeeded in 0.00 seconds (__init__:312) 2021-01-17 11:13:30,420+0100 WARN (monitor/4a62cdb) [storage.LVM] Reloading VGs failed (vgs=[u'4a62cdb4-b314-4c7f-804e-8e7275518a7f'] rc=5 out=[] err=[' Volume group "4a62cdb4-b314-4c7f-804e-8e7275518a7f" not found', ' Cannot process volume group 4a62cdb4-b314-4c7f-804e-8e7275518a7f']) (lvm:470) 2021-01-17 11:13:30,424+0100 ERROR (monitor/4a62cdb) [storage.Monitor] Setting up monitor for 4a62cdb4-b314-4c7f-804e-8e7275518a7f 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) I assume due to the changed LVM UUID it fails, right? Can I someone fix/change the UUID and get the node back up again? It does not seem to be a major issue, to be honest. I can see the gluster mount (what ovirt mounts when it onlines a node) already, and gluster is happy too. Any help is appreciated! -Chris. -- with kind regards, mit freundlichen Gruessen, Christian Reiss