Introduction & general question about oVirt
by Nicolas Kovacs
Hi,
I'm a 53-year old Austrian living in Montpezat, a small village in South
France. I'm an IT professional with a focus on Linux and free software, and
I've been a Linux user since Slackware 7.1.
I'm doing web & mail hosting for myself and several small structures like our
local school and a handful of local companies. Up until recently these hostings
have happened on "bare metal" root servers using CentOS 7. One main server is
hosting most of the stuff: WordPress sites, one OwnCloud instance, Dolibarr
management software, GEPI learning platform, Postfix/Dovecot mail server,
Roundcube webmail, etc.
This setup has become increasingly problematic to manage, since applications
have more and more specific requirements, like different versions of PHP and
corresponding modules.
So I decided to split everything up nicely into a series of virtual machines,
each one with a nicely tailored setup.
I have a couple of sandbox servers, one public and one local, running Oracle
Linux 7 (a RHEL clone like CentOS). I played around with it, and KVM-based
virtualization already works quite nicely.
While looking for documentation, I stumbled over oVirt, which I didn't even
know existed until last week. Before I dive head first into it, I'd be curious
to know a few general things.
1. Would it be overkill for a small structure like mine?
2. Will I be able to do HA on a series of modest KVM-capable root servers even
if they are located in different datacenters across different countries?
3. One problem I couldn't resolve using a bone-headed keep-it-simple KVM setup
is backup. For my bare-metal servers I've been using incremental backups using
Rsnapshot for years. Here's a blog article I wrote on the subject:
https://blog.microlinux.fr/rsnapshot-centos-7/
Unfortunately I can't use this approach with huge QCOW images, at least not
without jumping through burning loops.
Is there an easy way to perform remote incremental backups with oVirt?
BTW, I took a peek at Proxmox and Ceph, but I admit I'm a die-hard RHEL-clone
user.
Cheers from the sunny South of France,
Niki
--
Microlinux - Solutions informatiques durables
7, place de l'église - 30730 Montpezat
Site : https://www.microlinux.fr
Blog : https://blog.microlinux.fr
Mail : info(a)microlinux.fr
Tél. : 04 66 63 10 32
Mob. : 06 51 80 12 12
4 years
Upgrading single host ovirt "clusters" to v4.5 via command line?
by Gilboa Davara
Hello all,
As the title suggests I have a couple of single-host hyper converged
setups, mostly used for testing.
As I cannot use the GUI cluster upgrade method on a single host (it
requires me to reboot the host, which will require me to shutdown the
hosted engine), is there any method to upgrade the cluster / data-center
via command line in maintenance=global mode?
Beyond that, can I use the same method on my production setups?
(multi-node, gluster based setups).
Thanks,
Gilboa
4 years
Re: FreeBSD 13 and virtio
by Nir Soffer
On Mon, Apr 19, 2021 at 5:11 PM Nur Imam Febrianto <nur_imam(a)outlook.com>
wrote:
> I’m having an issue, if I’m using q35 and using virtio disk + virtio
> network adapter, the guest OS wont detect any disk. I440fx work fine. This
> issue happened on FBSD 12.2 too. On FBSD 13 release note, it was said q35
> should working okay now, a lot of people using pc-q35-4.2 machine type
> confirm it works now on vanilla KVM. But seems it still doesn’t work on
> oVirt.
>
It will help if you can file a bug about this, and attach a vm xml that
works
outside of ovirt (e.g using virt-manger, or virsh), so we can compare to
our vm xml.
Nir
>
>
> *From: *Sandro Bonazzola <sbonazzo(a)redhat.com>
> *Sent: *19 April 2021 19:35
> *To: *Nur Imam Febrianto <nur_imam(a)outlook.com>
> *Cc: *oVirt Users <users(a)ovirt.org>
> *Subject: *Re: [ovirt-users] FreeBSD 13 and virtio
>
>
>
> Hi, can you please provide some more details on the issues you're seeing?
>
>
>
> Il giorno sab 17 apr 2021 alle ore 06:35 Nur Imam Febrianto <
> nur_imam(a)outlook.com> ha scritto:
>
> Hi,
>
>
>
> Any body already try FBSD 13 sing q35 + virtio disk + virtio net ?
>
> I cant get it working, it should be fine in FBSD 13, lastly on FBSD 12 it
> was the q35 spec issue with the kernel. Lot of people now it works nicely
> on FBSD 13, but I cant get it working on oVirt.
>
>
>
> Thanks before.
>
>
>
> Regards,
>
> Nur Imam Febrianto
>
>
>
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>
>
>
>
> --
>
> *Sandro Bonazzola*
>
> MANAGER, SOFTWARE ENGINEERING, EMEA R&D RHV
>
> Red Hat EMEA
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>
> sbonazzo(a)redhat.com
>
>
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>
>
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>
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4 years
How to Upgrade Node with Local Storage ?
by Nur Imam Febrianto
Hi,
How we can upgrade oVirt Node that using Local Storage ? Seems I cant find any good documentation about this.
Planning to upgrade one 4.4.4 node with local storage to 4.4.5.
Thanks before.
Regards,
Nur Imam Febrianto
4 years
Why and when does oVirt make a compute host part of the HCI Gluster?
by Thomas Hoberg
My understanding is that in a HCI environment, the storage nodes should be rather static, but that the pure compute nodes, can be much more dynamic or opportunistic: actually those should/could even be switched off and restarted as part of oVirt's resource optimization.
The 'pure compute' nodes fall into two major categories, a) those who can run the management engine, b) those who can't.
What I don't quite understand is why both types seem to be made 'gluster peers', when they don't contribute storage bricks: shouldn't they just be able to mount Gluster volumes?
The reason for my concern is that I actually want to manage these computing hosts with much more freedom. I may have them join and take on workloads, or not and I may want to shut them down.
To my irritation I sometimes even see these 'missing' hosts being considered for quorum decisions or being listed e.g. when I do a 'gluster volume engine status'. I find hosts there, that definitely are not contributing bricks to 'engine' (or any other volume).
Then I'm not even sure I have consistent behavior when I remove hosts from oVirt: I'd swear that quite a few remain as Gluster peers, even if they are completely invisible from the oVirt GUI (while hosted-engine --vm-status will still list them).
So what's the theory here and would it be a bug if removed hosts remain gluster members?
4 years
Expand gluster volumes
by David White
Is it possible to expand an existing gluster volume?
I have a hyperconverged environment, and have enough space right now, but I'm going to have to significantly over-provision my environment. The vast majority of our customers are using a small fraction of the amount of space that they are technically allocated, but we still need to make that space available to them.
As a result, I'd like to plan ahead, and go ahead and have a plan to add storage later down the road.
I'd like to plan to shut down each server in the cluster (individually, not at once), add storage, and then bring them back online. Once all 3 are back online with the additional storage, I'd like to expand the gluster volume to use the additional space. Is that possible? How?
Sent with ProtonMail Secure Email.
4 years
After upgrade to 4.4.5: cockpit login error
by ovirt＠r5d.de
Hello,
1. Installation ovirt node iso 4.4.4
2. dnf upgrade -> 4.4.5
-> error login cockpit:
Message:
pr 18 13:02:53 h2 systemd[1]: cockpit-wsinstance-https-factory(a)2-7789-995.service: Succeeded.
Apr 18 13:02:53 h2 cockpit-ws[7796]: cockpit-ws: Failed to open certificate file /run/cockpit/tls/e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855: No such file or directory
Apr 18 13:02:55 h2 cockpit-ws[7796]: cockpit-session: open(/var/log/btmp) failed: Permission denied
What is todo?
Thx.
4 years
Ovirt and gluster 9 volume
by eevans＠digitaldatatechs.com
My setup is 3 Centos 7 servers hyper-converged with a 4th stand alone engine server. My issue is Ovirt is reading the cluster disk as 49GiB instead of 5.5 TB is should be.
One server has a 928 GB raid 5 volume, the second has a 7,7 TB raid 10 volume and the third has a 5.5 TB raid 10 volume. How is Ovirt translating this to 49 GiB??
Here is a link to the screen shots for verification.
https://1drv.ms/u/s!AvgvEzKKSZHbhLIrRBvQRLmoZOeEyw?e=rO83vw
Logs look good unless I missed something.
Any help is appreciated.
Eric
4 years
