[ovirt-users] Re: oVirt: single host install
-----Original Message-----
From: Derek Atkins [mailto:warlord@MIT.EDU]
Sent: Monday, May 21, 2018 8:33 AM
To: Simone Tiraboschi <stirabos(a)redhat.com>
Cc: users <users(a)ovirt.org>; ovirt(a)fateknollogee.com
Subject: [ovirt-users] Re: oVirt: single host install
Hi,
Simone Tiraboschi <stirabos(a)redhat.com> writes:
On Mon, May 21, 2018 at 7:49 AM, <ovirt(a)fateknollogee.com>
wrote:
Use case: small sites with a minimum number of vm's.
Is there such a thing as a single host install?
In the past we had the all-in-one mode but we deprecated it.
Now the suggested mode is hosted-engine since you could expand it
adding other hosts in the future.
Sounds like "local storage" is useless then?
I am running in this configuration and have had little problem. I migrated from an old
vmware-server platform, and, modulo a few hiccups along the way and a few false starts as
I was installing ovirt, it's been pretty stable for me!
Did you use NFS for all storage domains?
Is it valid for production use?
With a single host the upgrades will become more intrusive: without
the capability to migrate your VMs on other hosts at upgrade time, you
will be required to bring down everything.
This is true -- I have to bring everything down when I want to upgrade the system,
especially the host itself. So I don't upgrade as often as I might if I had multiple
hosts where I could migrate.
How can you do it without a second host and importing with a temporary storage domain?
What kind of storage?
NFS in loopback could be problematic, I'd suggest gluster in replica 1
or iSCSI.
I'm running loopback NFS and I've not encountered any issues. I've been
running this way since 2016-10-22. I did not understand Gluster enough and wasn't
sure how I could make a "replica 1" -- everything seemed to imply you *NEEDED* 3
gluster hosts. So I went with what I knew -- NFS.
This might be problematic if I move forward to a multi-host platform as I'll have to
"migrate" my storage -- specifically for hosted-engine -- which IIRC requires a
re-install (or some other drastic measure).
-derek
--
Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
Member, MIT Student Information Processing Board (SIPB)
URL:
https://urldefense.proofpoint.com/v2/url?u=http-3A__web.mit.edu_warlord_&...
PP-ASEL-IA N1NWH
warlord(a)MIT.EDU PGP key available
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