Hi Greg --

Yes, RedHat OpenShift is typically used in conjunction with Kubernetes and
containers, but can also host "classic" VMs, although there is some work
involved ... It's not 1:1.

My work, APS, is also considering this switch.

--
Thanks,
Alexander

Sent from my Google Pixel 7 Pro

On Tue, Jul 2, 2024, 14:09 greg zegan via PLUG-discuss <
plug-discuss@lists.phxlinux.org> wrote:

> speaking of VMs I see they are migrating from VMWare to OpenShift from Red
> Hat at work.
> Anyone know more about this? Is it cost based?
> no one is saying why here.
>
> On Tuesday, July 2, 2024 at 02:05:11 PM MST, Ryan Petris via PLUG-discuss <
> plug-discuss@lists.phxlinux.org> wrote:
>
>
> I think the option you're looking for is called "affinity":
>
>
> https://pve.proxmox.com/pve-docs/pve-admin-guide.html#qm_cpu_resource_limits
>
> With the *affinity* option, you can specify the physical CPU cores that
> are used to run the VM’s vCPUs. Peripheral VM processes, such as those for
> I/O, are not affected by this setting. Note that the *CPU affinity is not
> a security feature*.
>
>
> That said, I'm wondering why you're wanting to do this, specifically what
> you think you're going to gain over just allowing the kernel to schedule
> things the way it normally does.
>
> For instance, it's not going to lock that core specifically for use to
> that VM; other processes can still use that core. You'd literally have to
> set the affinity of every single process on your system to specific cores
> which would be an extreme pain. You still wouldn't have much control over
> which cores receive interrupts and whatnot so even then you still wouldn't
> have complete control.
>
> Just let the scheduler do its thing, otherwise you're likely going to end
> up with weird issues that no one can help with or explain.
>
> On Tue, Jul 2, 2024, at 1:51 PM, Snyder, Alexander J via PLUG-discuss
> wrote:
>
> I have a VM running with QEMU on Debian, v is a TrueNAS. Although they
> give you a GUI to select options, it is my understanding that it's just
> pure QEMU running on the backend.
>
> In this VM, I have vCPUs configured.
>
> --
> Thanks,
> Alexander
>
> Sent from my Google Pixel 7 Pro
>
> On Tue, Jul 2, 2024, 13:43 Keith Smith via PLUG-discuss <
> plug-discuss@lists.phxlinux.org> wrote:
>
> Hi,
>
> I've started to skim the Ubuntu docs on QEMU. It talks about vCPUs.
> I've run both VirtualBox and Proxmox. Seems both VirtualBox and Proxmox
> only allow for CPU allocation at the CPU level.
>
> I'd really like to be able allocate vCPUs.
>
> Do I understand this correctly?
>
> Thanks!!
> Keith
>
>
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