On Sun, Mar 12, 2017 at 7:57 AM, Yedidyah Bar David <didi@redhat.com> wrote:
Hi, All. We have an ovirt 4.1 cluster setup using multiple paths to a single iSCSI LUN for the data storage domain. I would now like to migrate to a hosted engine.
I setup the new engine VM, shutdown and backed-up the old VM, and restored to the new VM using engine-backup. After updating DNS to change our engine's FQDN to point to the hosted engine, everything seems to work
On Fri, Mar 10, 2017 at 3:43 PM, Devin A. Bougie <devin.bougie@cornell.edu> wrote: properly. However, when rebooting the entire cluster, the engine VM doesn't come up automatically.
I am aware that the above flow is technically possible - nothing stops you from doing it - but it's not the standard/supported/expected way to deploy a hosted-engine. You must use 'hosted-engine --deploy' for that. Nice try, though :-) Will be an interesting exercise to try and convert this to a fully-functioning hosted-engine, but I'd personally not try that on a production system.
On the hosted-engine storage domain we have also the lockspace, metadata and configuration volumes. They are created at setup time by ovirt-hosted-engine-setup
Is there anything that now needs to be done to tell the cluster that
it's now using a hosted engine?
Yes, but it's currently not possible to do this after the fact.
I started with a standard engine setup, as I didn't see a way to
specify multiple paths to a single iSCSI LUN when using "hosted-engine --deploy."
I think it's indeed not fully-supported yet [1], but can be done manually [2][3].
Simone - are there updates for this? Perhaps we should add this to the hosted-engine howto page.
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1193961 [2] http://lists.ovirt.org/pipermail/users/2015-March/032034.html [3] https://bugzilla.redhat.com/show_bug.cgi?id=1193961#c2
Here we have two distinct things: - use multiple iSCSI initiators on the host; the best way to achieve this is configuring an iSCSI bond from the engine once it's running. See 'Configuring iSCSI Multipathing' section on http://www.ovirt.org/documentation/admin-guide/chap-Storage/ - get multipath connecting to multiple targets on the same SAN: this is currently not supported by hosted-engine-setup and ovirt-ha-agent
Any tips would be greatly appreciated.
Many thanks, Devin _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- Didi