Hi, I suppose you have one host, if you will take a look to rhev-engine logs you will see kind of the following error: Cannot connect to Pool wrong master domain or it version.
One host (only), yes.
The only advice is to access to DB and update msater domain version inside storage_pool table. The query should be "update storage_pool set master_domain_version=110" after that please try to activate a host again
Indeed, that seem to do the trick (thanks!). Setting the version in the database to match the one from the log does make me able to bring the host back online While the host came back online as well as all other storage domain the master domain did not. I remains in status locked. Part from not being able to access the vm-data from that domain it also gives some funny side effects. For instance I could quite happily put the export-domain to maintenance mode but not re-attach the same since the master domain is not active. Not sure if related, but when trying to also take the host into maintenance mode it refuses due to ongoing tasks. [root@fat-tony admin]# vdsClient -s 0 getAllTasks 4ca8e2f9-b8a6-425d-baba-b3cb9a6a154f : verb = createVolume code = 0 state = failed tag = spm result = message = Task is initializing id = 4ca8e2f9-b8a6-425d-baba-b3cb9a6a154f I did manage to get rid of that with 'vdsClient clearTask' but it makes no difference putting the host in and out of maintenance mode and or rebooting it. The lock remains. I fail to find any information where this lock is set. Is is done by the vdsm-layer and therefore to be controlled by the... 'vdsClient aquire|releaseDomainLock' .. ? That however seem to fail as well vdsClient -s 0 releaseDomainLock dae1ba5e-548a-473e-94b6-7d08d3a6229a ea5643f7-f41f-4c44-a27f-f31240cd0f19 Traceback (most recent call last): File "/usr/share/vdsm/vdsClient.py", line 2411, in <module> File "/usr/share/vdsm/vdsClient.py", line 1381, in releaseDomainLock File "/usr/lib64/python2.7/xmlrpclib.py", line 1224, in __call__ File "/usr/lib64/python2.7/xmlrpclib.py", line 1578, in __request File "/usr/lib64/python2.7/xmlrpclib.py", line 1264, in request File "/usr/lib64/python2.7/xmlrpclib.py", line 1297, in single_request File "/usr/lib64/python2.7/xmlrpclib.py", line 1473, in parse_response File "/usr/lib64/python2.7/xmlrpclib.py", line 793, in close Fault: <Fault 1: '<type \'exceptions.Exception\'>:method "releaseDomainLock" is not supported'> Could someone please point me in the right direction ? Rgds Jonas