Hi,
Which version are you using?

in 4.1 , the support of adding shared storage to local DC was added [1].
You can copy/move disks to the shared storage domain, then detach the SD and attach to another DC.

In any case, you wont be able to live migrate VMs from the local DC, it is not supported.

Regards,
Fred

[1] https://ovirt.org/develop/release-management/features/storage/sharedStorageDomainsAttachedToLocalDC/

On Fri, Feb 23, 2018 at 1:35 PM, Andrei V <andreil1@starlett.lv> wrote:
Hi,

I have oVirt setup, separate PC host engine + 2 nodes (#10 + #11) with local storage domains (internal RAIDs).
1st node #10 is currently active and can’t be turned off.

Since oVirt doesn’t support more then 1 host in data center with local storage domain as described here:
http://lists.ovirt.org/pipermail/users/2018-January/086118.html
defined another data center with 1 node #11.

Problem: 
1) can’t copy or move VM disks from node #10 (even of inactive VMs) to node #11, this node is NOT being shown as possible destination.
2) can’t migrate active VMs to node #11.
3) Added NFS shares to data center #1 -> node #10, but can’t change data center #1 -> storage type to Shared, because this operation requires detachment of local storage domains, which is not possible, several VMs are active and can’t be stopped.

VM disks placed on local storage domains because of performance limitations of our 1Gbit network. 
2 VMs running our accounting/inventory control system, and are critical to NFS storage performance limits.

How to solve this problem ?
Thanks in advance.

Andrei


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