On Thu, Jan 4, 2018 at 4:03 AM, Sam McLeod <mailinglists@smcleod.net> wrote:
If one was to attach a shared iSCSI LUN as 'storage' to an oVirt data centre that contains existing data - how does oVirt behave?

For example the LUN might be partitioned as LVM, then contain existing filesystems etc...
 
- Would oVirt see that there is existing data on the LUN and simply attach it as any other linux initiator (client) world, or would it try to wipe the LUN clean and reinitialise it?

Neither - we will not be importing these as existing data domains, nor wipe them, as they have contents.
 


Context: Investigating migration from XenServer to oVirt (4.2.0)

A very interesting subject - would love to see the outcome!
 

All our iSCSI storage is currently attached to XenServer hosts, XenServer formats those raw LUNs with LVM and VMs are stored within them.

I suspect we need to copy the data. We might be able to do some tricks, but at the end of the day I think copying the data, LV to LV, makes the most sense.
However, I wonder what else is needed - do we need a conversion of the drivers, different kernel, etc.?

What are the export options Xen provides? Perhaps OVF?
Is there an API to stream the disks from Xen?
Y.
 



If the answer to this is already out there and I should have found it by searching, I apologise, please point me to the link and I'll RTFM.

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