I finally got this to work.
I believe that my issue was that when I thought I had uploaded the ISO, the ISO wasn't actually being uploaded successfully.

I tried to upload various ISOs to different Storage Domains, and eventually noticed that in a couple of cases, I would see a status bar that slowly incremented over time indicating the percentage of the upload complete - whereas before, there would be no status bar, and the oVirt Manager would indicate that the ISO had just been uploaded completely.

I was able to "replicate" this status bar with the RHEL ISO, and now my VM is booting to that ISO fine.

Problem resolved.


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‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Friday, June 4, 2021 8:47 PM, David White via Users <users@ovirt.org> wrote:

More details here:

I just tested this (new) VM now on a CentOS 7 ISO.
That worked perfectly fine.

But as soon as I tried to attach the RHEL 8 Boot ISO, it did not work.
The specific error I'm seeing is:

Boot failed: Could not read from CDROM (code 0095).

See below screenshot:
Screenshot from 2021-06-04 20-47-14.png


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‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Friday, June 4, 2021 8:27 PM, David White via Users <users@ovirt.org> wrote:

I uploaded the RHEL ISOs the same way I uploaded the Ubuntu ISOs:
Navigate to Storage -> Disks and click Upload (so using the wizard).

Once the ISOs are in place, I've attached them to VMs the same way I've attached Ubuntu ISOs: Select the Virtual Machine, click Edit, go to Boot Options, click the checkbox beside "Attach CD" and change the First Device to CD-ROM.

The oVirt Manager is 4.4.6, but the cluster compatibility is stuck at 4.4.5 right now.
This particular problem has been ongoing, though, since before I attempted to upgrade everything to 4.4.6.


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‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Friday, June 4, 2021 9:29 AM, Strahil Nikolov <hunter86_bg@yahoo.com> wrote:

There should be no reason not to work.
Did you select the ISO as bootable device ?

Maybe you can provide steps how you do it?

What is your oVirt version ?


Best Regards,
Strahil Nikolov


On Fri, Jun 4, 2021 at 12:25, David White via Users
<users@ovirt.org> wrote:
Ever since I deployed oVirt a couple months ago, I've been unable to boot any VMs from a RHEL ISO.
Ubuntu works fine, as does CentOS.

I've tried multiple RHEL 8 ISOs on multiple VMs. 
I've destroyed and re-uploaded the ISOs, and I've also destroyed and re-created the VMs.

Every time I try to boot a VM to a RHEL 8 ISO, the console just tells me that "No boot device" was found.

Can anyone think of any reason why other ISOs would work, when RHEL ISOs do not work? How can I troubleshoot this further?
I really need to get a server up and running with Podman. 


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