Well I do not know about just 'pausing' it sounds not plausible to me,
except wrt clock skew which may cause krb auth and replication to fail.

Yes, that's exactly what is happening.
But if you restore such a snapshot after the original machine had a
fatal accident then it may come with issues.
It is enough just to 'resume' the VM host operation (after being paused) to 
cause problems.
I think the issue is due to the fact that the directory service in AD is
not being shut down before the snapshot. This results in you
snapshotting the underlying database in a potentially unclean state.
You could run in similar issues if you do this with FreeIPA and you do
not ipactl stop right before taking the snapshot, the DS database will
be in an open state and potentially in the middle of a transaction.
Yes, I understand the consequences and how to deal with them in the IPA environment. But for most admins it seems to me better just to generally say "never virtualize this unless you well know what you are doing", right?


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