[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.
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!
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.
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: http://web.mit.edu/warlord/ PP-ASEL-IA N1NWH
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