Re: kvm/qemu on btrfs - manage imagaes

[vrms]

    hei jed,
      
      that sounds slick. thx for the pointer.
      
      out of interest ... 
      
      1. how do you handle snapshots for VMs? 
          I guess you have the choice between btrfs/zfs and qemu/virsh
      snapshots on the images to your avail with a setup as yours
    2. is there anything else then the hd images inside those
    subvolumes?
    
    all best
    Gunnar

On 28.04.25 18:06, Jed Reynolds wrote:

When I set up a ZFS pool for VMs , I dedicate a filesystem per VM , so that I can independently roll back VMS. So I would suggest creating a sub-volume for each of your own VMs.

Jed

On April 27, 2025 11:26:51 PM PDT, vrms <vrms@netcologne.de> wrote:

I want to set up kvm/qemu virtualization on personal notebook (debian 13) and have one issue I need to address.

I am running on btrfs taking regular snapshots for the / directory, which lead to high hard disk usage due to all snapshots being made of qcow2 images of vms (being located in /var/lib/libvirt/images in the past ...

In order to avoid running into such a situation again I am thinking on how to set this up a little different. 2 ideas is this regards:

1. setting up a btrfs subvol for the mentioned directory (prior installation)
2. putting the image file elsewhere (which would also be a subvol)

what would you suggest?

... while writing this I feel #2 would be the better way to approach.
So the question (if you agree) ... is it the --disk path= option in a virt-install command, that would take care of that?