Hardware upgrade of Proxmox Server

[FaisalNoman]

Greetings,

I'm preparing to enhance the hardware of my Proxmox servers, which involves upgrading the CPU, RAM, and storage to accommodate future needs. I'm worried about whether this hardware upgrade will affect my existing virtual machines, which are already operational. It's important to note that my servers are not part of proxmox cluster.

 

[leesteken]

It should not matter for VMs, unless they use PCI(e), USB or disk passthrough. Especially the first might not even work on the other hardware, the others usually need an small adjustment).
If you get CPU(s) with more cores but lower speed, that might impact VMs as single thread work-loads will be slower. More but slower RAM might have a similar but smaller impact.
There might other things but usually Proxmox handles hardware changes pretty well as Linux does in general.

 

[FaisalNoman]

It should not matter for VMs, unless they use PCI(e), USB or disk passthrough. Especially the first might not even work on the other hardware, the others usually need an small adjustment).
If you get CPU(s) with more cores but lower speed, that might impact VMs as single thread work-loads will be slower. More but slower RAM might have a similar but smaller impact.
There might other things but usually Proxmox handles hardware changes pretty well as Linux does in general.

Thanks for the information, So as I'm just upgrading the hardware, opting for a better CPU with more cores, additional RAM, and storage. This shouldn't pose any problems for the currently configured VMs, right?"

 

[leesteken]

So as I'm just upgrading the hardware, opting for a better CPU with more cores, additional RAM, and storage. This shouldn't pose any problems for the currently configured VMs, right?"

It depends (on the things I already wrote). Maybe I don't understand your question or do you want me to repeat my answer?

 

[Kingneutron]

Make a full backup of all VMs and containers, a full backup of your PVE host, and also backup critical files on the side somewhere for fast/easier restore **before** you start messing with anything.

https://github.com/kneutron/ansitest

https://www.youtube.com/watch?v=g9J-mmoCLTs

The major thing to consider is your NIC names changing with the different hardware. If you keep using the same OS/Proxmox install disk and just move it to the new server, /etc/network/interfaces will likely need fixing.

Otherwise if you do a fresh install and just restore all your virtual stuff onto the new hardware from backup, it should mostly Just Work as long as you have the same network and storage setup.

The other thing I can think of, is what vCPU type are your VMs using? If it's " host " then you might need to reconfigure for a more common type such as " x86-64-v2-AES "