hosted hypervisor for x86 virtualization

[Darrell Lee]

I am requesting a presentation on Hypervisors on Linux, i.e. VirtualBox,
Boxes, etc.

Just a suggestion....

--
Darrell Lee
Advanced Data LLC
864-230-9626 | dl...@adsi-sc.com

[Jas Eckard]

Hey, Darrell! I was just looking through emails that I hadn't read
yet, and came across your request for a topic on Hypervisors.

Although you requested in January, you're in luck! Bill Jacqmein is
planning to have a presentation on ProxMox at next month's meeting,
July 8. Hope you're back in the Upstate from any Independence Day
celebrations!

--Jas
.
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[Thomas Darrell Lee]

Thanks Jas, I'll try to be there!

To view this discussion visit https://groups.google.com/d/msgid/uclug/CAC%2BRRju-Si_GR-4D-5dvfGCoXOa3BbnvdRUKXHvudE6uWD1Rgw%40mail.gmail.com.

[Bill Jacqmein]

Wildly enough I start with the Type 1, Type 2 and containers.

Linux KVM is the biggie. I leverage it on my laptop with virt-manager
(https://en.wikipedia.org/wiki/Virt-manager) and it is the VM
hybervisor behind proxmox.
Included an image from the wikipedia page with some other options.

https://kubevirt.io/ lets you run virtual machines on Kubernetes which
is pretty interesting.

https://harvesterhci.io/ is also pretty interesting.


On Mon, Jun 16, 2025 at 2:34 PM 'Thomas Darrell Lee' via Upstate

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[George Law]

Sharing this as it might help someone playing around with kvm/qemu

I've got a pretty hefty lenovo thinkstation as a home lab

running fedora 41 with a lot of home grown scripts related to my current and past work with Red Hat

e.g. scripts to start up several vms at once (either a ceph cluster or pacemaker), etc ... add a raw disk as a shared disk between vms... 

anyway, been messing around with some scripting in rc.local only to finally realize that libvirtd shuts down before rc.local gets run on a shutdown and that renders my script useless.  I am aware with the autostart option, but don't really want to autostart everything.

anyway, the answer was the built in libvirt-guests.service 

sudo systemctl enable --now libvirt-guests.service

~~~
$ cat /etc/sysconfig/libvirt-guests
ON_BOOT=start
ON_SHUTDOWN=suspend
~~

And then that takes care of whatever is running at shutdown and restores it afterwards.

~~~

Jun 20 13:43:01 lab libvirt-guests.sh[3396]: Running guests on default URI:
Jun 20 13:43:01 lab libvirt-guests.sh[3351]: rhel79-gfs-node1, rhel79-gfs-node2, rhel84-gfs-node1, rhel84-gfs-node2
Jun 20 13:43:01 lab libvirt-guests.sh[3500]: Suspending guests on default URI...
Jun 20 13:43:01 lab libvirt-guests.sh[3351]: Suspending rhel79-gfs-node1: ...
Jun 20 13:43:04 lab libvirt-guests.sh[3351]: Suspending rhel79-gfs-node1: done
Jun 20 13:43:04 lab libvirt-guests.sh[3351]: Suspending rhel79-gfs-node2: ...
Jun 20 13:43:07 lab libvirt-guests.sh[3351]: Suspending rhel79-gfs-node2: done
Jun 20 13:43:07 lab libvirt-guests.sh[3351]: Suspending rhel84-gfs-node1: ...
Jun 20 13:43:11 lab libvirt-guests.sh[3351]: Suspending rhel84-gfs-node1: done
Jun 20 13:43:11 lab libvirt-guests.sh[3351]: Suspending rhel84-gfs-node2: ...
Jun 20 13:43:15 lab libvirt-guests.sh[3351]: Suspending rhel84-gfs-node2: done
Jun 20 13:43:15 lab systemd[1]: libvirt-guests.service: Deactivated successfully.
Jun 20 13:43:15 lab systemd[1]: Stopped libvirt-guests.service - libvirt guests suspend/resume service.
-- Boot 19096a0e8e3941d9bd8cf112b16b6ebf --
Jun 20 13:45:19 lab systemd[1]: Starting libvirt-guests.service - libvirt guests suspend/resume service...
Jun 20 13:46:03 lab libvirt-guests.sh[2091]: Resuming guests on default URI...
Jun 20 13:46:08 lab libvirt-guests.sh[2097]: Resuming guest rhel79-gfs-node1:
Jun 20 13:46:08 lab libvirt-guests.sh[2507]: done
Jun 20 13:46:11 lab libvirt-guests.sh[2512]: Resuming guest rhel79-gfs-node2:
Jun 20 13:46:11 lab libvirt-guests.sh[2518]: error: Failed to start domain 'rhel79-gfs-node2'
Jun 20 13:46:11 lab libvirt-guests.sh[2518]: error: operation failed: domain is not running
Jun 20 13:46:14 lab libvirt-guests.sh[2582]: Resuming guest rhel84-gfs-node1:
Jun 20 13:46:14 lab libvirt-guests.sh[2729]: done
Jun 20 13:46:18 lab libvirt-guests.sh[2734]: Resuming guest rhel84-gfs-node2:
Jun 20 13:46:18 lab libvirt-guests.sh[2840]: done
Jun 20 13:46:18 lab systemd[1]: libvirt-guests.service: Main process exited, code=exited, status=1/FAILURE

~~~

if this helps anyone :) 

~George

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[Jas Eckard]

I try to confirm with my speakers before I make a week-before
announcement: You'll be giving UCLUG your presentation on July 8?

Also, if you could give me the title and short description, that'll be
what I post everywhere. Otherwise I'll make something up, and it
won't necessarily be what your talk is about. :^)

--Jas
.
..:

[Jeremy Sands]

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___________

Jeremy Sands

jeremysands.com

Real time communication?   Ask me about Signal or Telegram.

Res publica non dominetur

[Jas Eckard]

Sorry, y'all, that was meant to be a private email to Bill Jacqmein.

But yes, Jeremy, one must be aware...  :^)

--Jas Eckard
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[Bill Jacqmein]

Broadcom has done very well aligning VMWare cost with the value
provided :) The audit letters are the next interesting twist in that
saga - https://arstechnica.com/information-technology/2025/06/vmware-perpetual-license-holder-receives-audit-letter-from-broadcom/
Nutanix (https://www.nutanix.com/) is what I would lean to first in a
budget rich(but less then Broadcom rich setting. Prommox while support
is there (https://www.proxmox.com/en/services/support-services/support)
most of it is still heavily community support which is great for the
homelab and budget concious.

"Linux Virtualization, a Tasting Tour" for the 8th. :)

Mostly it will be Proxmox but Darrell brought up there are other good
options without treading so far into homelabbing so I figured I would
share how Im using VMM to create something akin to virtualbox on my
linux laptop. There might be some Kubevirt sprinkled in
(https://kubevirt.io/) but Im still trying to grok Kubernetes so it
would be sparse.

Chick-Fil-A is my current favorite Kubernetes story (as well as my
favorite chicken sandwich) -
https://medium.com/chick-fil-atech/observability-at-the-edge-b2385065ab6e
and https://medium.com/chick-fil-atech/enterprise-restaurant-compute-f5e2fd63d20f

Since we started this adventure, This also release which would has
much higher production value then what I could do:
https://www.sysadmintutorials.com/how-to-install-setup-proxmox-8/ for
the deeper dive into Proxmox.

It sparked an interesting discussion so it happened exactly as it was
meant to. :)

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[Thomas Darrell Lee]

When is the next meeting?

Darrell Lee

Advanced Data LLC

dl...@adsi-sc.com

864-230-9626

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[Jas Eckard]

Next meeting is July 8, next Tue, and I'll have a proper announcement tomorrow.

--Jas Eckard
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