VM redundancy
reddit / selfhosted

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chaplin2 · 2023-11-24 19:54

I had proxmox with automatic VM updatesx, but VMs sometimes hang or
stop booting. That’s not something that I can rely on.

I want to run a vm and make sure the service is always available. Thr
users should always have access. The bare metal installation works for
a long time, but not a VM. I can tolerate a 30 minutes fix once year,
but it won’t work telling users sorry there is a problem this week
with my server!!!

How to set up the VM?

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ElevenNotes · 2023-11-24 20:01

I think you have another issue. Either you have weird OS configs in
your VM's or your host has issues.

**Disclaimer:** *I run thousands of VM's since years and I can count
the number of a VM crashing or hanging on one hand.*

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chaplin2 · 2023-11-24 20:04

interesting, and encouraging. Do you use proxmox?

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Acrobatic_Assist_662 · 2023-11-24 22:24

Yeah. Unless I purposefully or accidentally mess something up, my VMs
run great without interaction. But either way, I usually have to
manually change something to create an unstable vm.

1) Check your host syslog (it’s available in the GUI) and it should
give you an idea of why the VMs are hanging.

2) Have you considered a high availability cluster? It’s literally the
tool that exists for what you want.

PBS is cool for like a disaster recovery scenario, but it shouldn’t be
the tool you go to for frequently unstable VMs. That’d be a fabric
bandaid at best, but leaning heavily to a liquid bandaid in practice.

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ElevenNotes · 2023-11-25 07:37

ESXi.

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-SPOF · 2023-11-26 20:42

I suppose you could deploy an HA cluster using either Ceph or StarWind
VSAN HA storage technology. These solutions replicate data across
cluster nodes, ensuring your VMs are highly available. They both fit
Proxmox.