[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&gt; 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&gt; writes: > On Mon, May 21, 2018 at 7:49 AM, <ovirt(a)fateknollogee.com&gt; 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_&d=DwIGaQ&c=Vxt5e0Osvvt2gflwSlsJ5DmPGcPvTRKLJyp031rXjhg&r= FiPhL0Cl1ymZlnTyAIIL75tE4L0reHcDdD-7wUtUGHA&m= aceiPp0tdZww5F1VjIbEi55JnMpkWzYlKSpsa56bcG8&s= Sxh76egRoJB5MNDdFRR9NubIiPK1tqZlSyW9tt4XzRQ&e= PP-ASEL-IA N1NWH warlord(a)MIT.EDU PGP key available _______________________________________________ Users mailing list -- users(a)ovirt.org To unsubscribe send an email to users-leave(a)ovirt.org _______________________________________________ Users mailing list -- users(a)ovirt.org To unsubscribe send an email to users-leave(a)ovirt.org