Re: [ovirt-users] migrating via pivotting the storage domain between instances of Manager
Hello Kenneth,
Le 26/10/2016 à 20:38, Kenneth Bingham a écrit :
Is it possible to "pivot" up or down guests from one
instance of Manager
to another instance of Manager by detaching the data storage domain from
the source Manager's data center and attaching it to the destination
Manager's data center?
Here, we're in a phase where we've done that exact action 6 times, and
yet 2 to go.
We're detaching+attaching these SD between 3.6.5 to 3.6.5 oVirt setups
(CentOS 7).
After having shut all VMs, cleanly detached the SD and attached to the
target, one still has to :
- activate the storage domain (according to your setup and the version,
this step may be automatic)
- manually import each VM : this step is long and has to be done one by
one (Redhat people : please comment).
In this last step, I found it quite fast, but some caveats are to be
avoided, like :
- pay attention to the MAC adresses, avoid the duplicates
- pay attention to the access rights of the hosts towards your storage
solution (iSCSI, NFS, aso...)
*I faced no issue regarding any relation between guests and hosts.*
I guess Redhat people will encourage you to share the logs of the
adequate machines :
- engine.log of both managers
- vdsm.log of both SPMs
I tried this with a block type storage domain,
but there are no storage domains found when I do "import domain" in the
destination Manager.
If I do "import domain" on the source Manager and choose the same oVirt
host to perform the import then the detached storage domain is able to
be imported. If I re-attach the storage domain to the source Manager's
data center the unregistered guests are available for import. Why does
this require that the oVirt host performing the import be the same host
that had formerly mounted the domain? Or, is it that the host is still
recognized as enrolled in the DC that had created the unregistered
guests on the detached storage domain?
What if, instead of detaching the storage domain from the source
Manager's data center, I shut down all guests and put the oVirt host in
maintenance mode and enroll that same oVirt host in the destination
Manager's data center, then would it be possible to import the detached
storage domain and import the unregistered guests and templates stored
there?
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Nicolas ECARNOT