Re: [ovirt-users] Moving from fc based to iSCSI based

On Wed, Mar 8, 2017 at 3:33 PM, Fred Rolland <frolland(a)redhat.com&gt; wrote: > I cannot think of another option other to have an export domain in the > middle that can be accessed from all the hosts. > > > On Wed, Mar 8, 2017 at 3:50 PM, Gianluca Cecchi < > gianluca.cecchi(a)gmail.com&gt; wrote: > >> On Wed, Mar 8, 2017 at 1:30 PM, Fred Rolland <frolland(a)redhat.com&gt; >> wrote: >> >>> Hi, >>> >>> Storage domains are per Data Center, and all hosts in this DC should be >>> able to access the SDs, no matter in which cluster they are... >>> >>> Are you sure your hosts are on the same DC ? >>> >>> Thanks, >>> >>> Freddy >>> >>> >> No, my scenario was a planning workflow. >> At this moment I only have Host1 and Host2 that are connected to an >> FC-SAN. >> I have to move data to an iSCSI storage and also oVirt hosts to Host3 >> and Host4 (yet to be deployed). >> So I'm trying to understand if I can do it in pieces bypassing >> export/import >> >> I forgot that it is DC the constraint for SD accessibility. >> Any suggestion to accomplish the desired target? >> >> Thanks, >> Gianluca >> >> > Is it realistic to think something similar to the workflow described below, based on the import storage domain functionality described here: http://www.ovirt.org/develop/release-management/features/ storage/importstoragedomain and in particular one of its targets: Transfer VMs between setups without the need to copy the data into and out of the export domain. Prerequisite: - Host1 has network connectivity with Host3 - Host1 is part of a DC that contains an FC based storage domain, composed of SAN LUN A of X Tb - Host3 is part of another DC and has connection in place with iSCSI LUN B of X Tb Workflow: - Stop the VMs that are on the source FC domain - Put source storage domain into maintenance - Detach source storage domain - Clone LUN A to LUN B at low level (eg dd command via network Similar to when you clone an entire disk from a server to another server.... ) - import domain on DC where Host3 lives giving the correct iSCSI parameters... Do the OVF_STORE disks on the storage domain contain information about the fact of it being an FC or an iSCSI storage domain, preventing then a possible import operation? This is a test environment where I would like to transfer 4Tb of data from FC SAN in decommission phase to an iSCSI SAN, and if I can by-pass export / import phases, even giving some downtime, would be good. Thanks for reading, Gianluca