9:32 p.m.
Hi Roger,
you can not import the snapshot because you already have an active
storage domain that contains the same (meta)data. Try detaching the
storage domain that you take snapshots from, and remove it (do not
select to wipe the data), and then try to import the snapshot. You will
see a warning that the domain is already registered within ovirt engine
and you can force the import to continue. After that, you should see the
domain registered in ovirt webadmin. Before detaching the domain, make
sure you have another domain active so it can become a master domain,
and create exports of the VM's that are part of that domain just in case.
I had the same problem while trying to import a replicated storage
domain, you can see that oVirt tries to import the domain, but it just
returns to import domain dialog. It actually mounts the domain for a few
seconds, then disconnects and removes the mount point under
/rhev/data-center/ and then it tries to unmount it and fails because
mount point doesn't exist anymore.
Mentioned it here recently:
http://lists.ovirt.org/pipermail/users/2015-November/036027.html
Maybe there is a workaround for importing the clone/snap of the domain
while the source is still active (messing with the metadata), but I
haven't tried it so far (there are several implications that needs to be
taken into the account). However, I'm also interested if there is a way
to do such a thing, especially when you have two separate datacenters
registered within the same engine, and it would be great for us to be
able to import snaps/replicated storage domains and/or VM's that reside
on it while still having the original VM's active and running.
Something similar to the third RFE here (this is only for VM's):
http://www.ovirt.org/Features/ImportUnregisteredEntities#RFEs
In any case, I'll try this ASAP, always an interesting topic. Any
insights on this is highly appreciated.
Ivan
On 11/24/2015 12:40 PM, Roger Meier wrote:
Hi All,
I don't know if this is a Bug or an error on my side.
At the moment, i have a oVirt 3.6 installation with two Nodes and Two
Storage Server, which
are configured themselfs als master/slave (solaris zfs snapshot copy
from master to slave all 2 hours)
Now i try to do some tests for some failure use cases like, master
storage isn't available anymore or
one of the virtual machines must be restored from the snapshot.
Because the data n the slave is a snapshot copy, all data which are on
the Data Domain NFS Storage,
are also on the slave NFS Storage.
I tried it to add over WebUI over the option "Import Domain" (Import
Pre-Configured Domain) with both
Domain Functions (Data and Export) but nothing happens, expect some
errors in the vdsm.log Logfile.
Something like this
Thread-253746::ERROR::2015-11-24
11:44:41,758::hsm::2549::Storage.HSM::(disconnectStorageServer) Could
not disconnect from storageServer
Traceback (most recent call last):
File "/usr/share/vdsm/storage/hsm.py", line 2545, in
disconnectStorageServer
conObj.disconnect()
File "/usr/share/vdsm/storage/storageServer.py", line 425, in disconnect
return self._mountCon.disconnect()
File "/usr/share/vdsm/storage/storageServer.py", line 254, in disconnect
self._mount.umount(True, True)
File "/usr/share/vdsm/storage/mount.py", line 256, in umount
return self._runcmd(cmd, timeout)
File "/usr/share/vdsm/storage/mount.py", line 241, in _runcmd
raise MountError(rc, ";".join((out, err)))
MountError: (32, ';umount:
/rhev/data-center/mnt/192.168.1.13:_oi-srv2-sasData1_oi-srv1-sasData1_nfsshare1:
mountpoint not found\n')
I checked with nfs-check.py if all permissions are ok, the tool say this:
Konsole output
[root@lin-ovirt1 contrib]# python ./nfs-check.py
192.168.1.13:/oi-srv2-sasData1/oi-srv1-sasData1/nfsshare1
Current hostname: lin-ovirt1 - IP addr 192.168.1.14
Trying to /bin/mount -t nfs
192.168.1.13:/oi-srv2-sasData1/oi-srv1-sasData1/nfsshare1...
Executing NFS tests..
Removing vdsmTest file..
Status of tests [OK]
Disconnecting from NFS Server..
Done!
Greetings
Roger Meier
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