Jan,
Thanks for taking the time for a great reply.
For what I am trying to accomplish here in my home lab, it seems that OKD is the safest
path. If I understand correctly, with OKD, I just need to build full vm's in the oVirt
environment which will become hosts, compute nodes, for containers that get deployed. OKD
is basically just container management and it does not care whether or not the compute
nodes are VM's or bare metal.
Again, thanks for taking the time to educate me.
Robert
________________________________________
From: Jan Zmeskal <jzmeskal(a)redhat.com>
Sent: Tuesday, December 24, 2019 4:43 PM
To: Robert Webb
Cc: users
Subject: Re: [ovirt-users] oVirt and Containers
Okay, so this topic is quite vast, but I believe I can at the very least give you a few
pointers and maybe others might chime in as well.
Firstly, there's the Kubevirt project. It enables you to manage both application
containers and virtual machines workloads (that cannot be easily containerized) in a
shared environment. Another benefit is getting advantages of the powerful Kubernetes
scheduler. I myself am not too familiar with Kubevirt, so I can only offer this high-level
overview. More info here:
https://kubevirt.io/
Then there is another approach which I am more familiar with. You might want to use oVirt
as an infrastructure layer on top of which you run containerized workflow. This is
achieved by deploying either
OpenShift<https://www.openshift.com/> or the upstream
project OKD<https://www.okd.io/> in the oVirt virtual machines. In that scenario,
oVirt VMs are considered by OpenShift as compute resources and are used for scheduling
containers. There are some advantages to this setup and two come into mind. Firstly, you
can scale such OpenShift cluster up or down by adding/removing oVirt VMs according to your
needs. Secondly, you don't need to set up all of this yourself.
For OpenShift 3, Red Hat provides detailed guide on how to go about this. Part of that
guide are Ansible playbooks that automate the deployment for you as long as you provide
required variables. More info here:
https://docs.openshift.com/container-platform/3.11/install_config/configu...
When it comes to OpenShift 4, there are two types of deployment. There's UPI - user
provisioned infrastructure. In that scenario, you prepare all the resources for OpenShift
4 beforehand and deploy it in that existing environment. And there's also IPI -
installer provisioned infrastructure. This means that you just give the installer access
to your environment (e.g. AWS public cloud) and the installer provisions resources for
itself based on recommendations and best practices. At this point, neither UPI nor IPI is
supported for oVirt. However there is a GitHub
repository<https://github.com/sa-ne/openshift4-rhv-upi> that can guide you through
UPI installation on oVirt and also provides automation playbooks for that. I have
personally followed the steps from the repository and deployed OpenShift 4.2 on top of
oVirt without any major issues. As far as I remember, I might have needed occasional
variable here and there but the process worked.
Hope this helps!
Jan
On Tue, Dec 24, 2019 at 8:21 PM Robert Webb
<rwebb@ropeguru.com<mailto:rwebb@ropeguru.com>> wrote:
Hi Jan,
Honestly, I didn't have anything specific in mind, just what is being used out there
today and what may be more prevalent.
Just getting my oVIrt set up and want to know what might be recommended. Would probably
be mostly deploying images like Homeassistent, piHole, etc.. for now.
I guess if there is good oVirt direct integration, it would be nice to keep it all in a
single interface.
Thanks..
________________________________________
From: Jan Zmeskal <jzmeskal@redhat.com<mailto:jzmeskal@redhat.com>>
Sent: Tuesday, December 24, 2019 1:54 PM
To: Robert Webb
Cc: users
Subject: Re: [ovirt-users] oVirt and Containers
Hi Robert,
there are different answers based on what you mean by integrating oVirt and containers. Do
you mean:
- Installing container management (Kubernetes or OpenShift) on top of oVirt and using
oVirt as infrastructure?
- Managing containers from oVirt interface?
- Running VM workloads inside containers?
- Something different?
I can elaborate more based on your specific needs
Best regards
Jan
On Tue, Dec 24, 2019 at 3:52 PM Robert Webb
<rwebb@ropeguru.com<mailto:rwebb@ropeguru.com><mailto:rwebb@ropeguru.com<mailto:rwebb@ropeguru.com>>>
wrote:
I was searching around to try and figure out the best way to integrate oVirt and
containers.
I have found some sites that discuss it but all of them are like 2017 and older.
Any recommendations?
Just build VM’s to host containers or is there some direct integration?
Here are a couple of the old sites
https://fromanirh.github.io/containers-in-ovirt.html
https://kubernetes.io/docs/setup/production-environment/on-premises-vm/ov...
https://www.ovirt.org/develop/release-management/features/integration/con...
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Jan Zmeskal
Quality Engineer, RHV Core System
Red Hat <
https://www.redhat.com>
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Jan Zmeskal
Quality Engineer, RHV Core System
Red Hat <
https://www.redhat.com>
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