On Sun, Sep 18, 2022 at 4:10 AM David White via Users <users(a)ovirt.org> wrote:
I thought I'd report back to the list and mention that I was successful in migrating
off of the hyperconverged environment onto a stand-alone engine environment, and Gluster
has been removed from the oVirt configuration.
Thanks for the report.
I ran into a few minor hiccups, all of which were resolved fairly easily, and I took
notes. I intend to submit a PR to the github documentation, since none currently exist for
migrating the engine off of a hyperconverged environment.
My only remaining questions at this point is:
Are there things on the hosts themselves that I should cleanup?
You might want to reinstall them from scratch, one-by-one, if you care
that much about them being clean. I personally do not think it's worth
it if your only reason is getting rid of hosted-engine remains, but
you might want to do this regardless for other reasons (e.g. if they
are old machines and accumulated other kinds of cruft).
I noticed that the "hosted-engine" command still exists. I
went to run a yum remove on that, and it tried to remove basically everything...
You can try 'dnf remove --noautoremove ovirt-hosted-engine-setup
ovirt-hosted-engine-ha'. This will remove also 'ovirt-host', which is
not such a good idea - it's a package that has no content, other than
a list of dependencies, on the various packages needed for a
functional oVirt host. Nothing will be broken immediately, but in
principle you risk losing new deps added to a future version of it,
etc.
so I figured that wasn't actually a good idea.
Do I need to do anything in the oVirt config (maybe something in the Postgres database)
to basically tell it that it is no longer self-hosted, but is instead stand-alone?
I do not know all the details, sorry. You might want to deploy a
hosted-engine, dump the engine db, then search the dump for 'hosted'
or something like that. Even checking a dump of a standalone engine
can show you relevant stuff to check.
One item I do know about is how to prevent 'engine-setup' from
preventing you from continuing because it thinks it's a hosted-engine
and not in global maintenance:
https://lists.ovirt.org/archives/list/users@ovirt.org/thread/SKGWY5ZIBAG5...
There is also the field 'hosted_engine_configured' in 'vds_dynamic',
not sure it's safe to change it outside of the engine (but no idea why
it might not be).
Good luck and best regards,
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------- Original Message -------
On Friday, August 19th, 2022 at 11:01 AM, David White via Users <users(a)ovirt.org>
wrote:
Hi Paul,
Thanks for the response.
I think you're suggesting that I take a hybrid approach, and do a restore of the
current Engine onto the new VM. I hadn't thought about this option.
Essentially what I was considering was either:
Export to OVA or something
OR
Build a completely new oVirt engine with a completely new domain, etc... and try to live
migrate the VMs from the old engine to the new engine.
Do I understand you correctly that you're suggesting I install the OS onto a new VM,
and try to do a restore of the oVirt settings onto the new VM (after I put the cluster
into Global maintenance mode and shutdown the old oVirt)?
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------- Original Message -------
On Friday, August 19th, 2022 at 10:46 AM, Staniforth, Paul
<P.Staniforth(a)leedsbeckett.ac.uk> wrote:
Hello David,
I don't think there's a documentated method to go from a
Hosted Engine to standalone just the other way standalone to HE.
I would suggest doing a full backup of the engine prepare the new VM and restore to that
rather than trying to export it.
This way you can shut down the original engine and run the new engine VM to test it works
as you will be able to restart the original engine if it doesn't work.
Regards,
Paul S.
________________________________
From: David White via Users <users(a)ovirt.org>
Sent: 19 August 2022 15:27
To: David White <dmwhite823(a)protonmail.com>
Cc: oVirt Users <users(a)ovirt.org>
Subject: [ovirt-users] Re: Should I migrate existing oVirt Engine, or deploy new?
Caution External Mail: Do not click any links or open any attachments unless you trust
the sender and know that the content is safe.
In other words, I want to migrate the Engine from a hyperconverged environment into a
stand-alone setup.
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------- Original Message -------
On Friday, August 19th, 2022 at 10:17 AM, David White via Users <users(a)ovirt.org>
wrote:
Hello,
I have just purchased a Synology SA3400 which I plan to use for my oVirt storage
domain(s) going forward. I'm currently using Gluster storage in a hyperconverged
environment.
My goal now is to:
Use the Synology Virtual Machine manager to host the oVirt Engine on the Synology
Setup NFS storage on the Synology as the storage domain for all VMs in our environment
Migrate all VM storage onto the new NFS domain
Get rid of Gluster
My first step is to migrate the oVirt Engine off of Gluster storage / off the
Hyperconverged hosts into the Synology Virtual Machine manager.
Is it possible to migrate the existing oVirt Engine (put the cluster into Global
Maintenance Mode, shutdown oVirt, export to VDI or something, and then import into
Synology's virtualization)? Or would it be better for me to install a completely new
Engine, and then somehow migrate all of the VMs from the old engine into the new engine?
Thanks,
David
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Didi