1

I now we cannot use thin LVM volumes with libvirt. Is there any other alternative allowing use of LVM thin provisioning in KVM/QEMU virtual machines?

0

libvirt does not directly support using thin volumes as storage pool: when selecting the volume group where creating each logical volumes (disk images), the thin pool is not shown on the list.

To use thin volumes with libvirt, you have two possibility:

  • manually create the required thin volume, attaching it to the virtual machine;
  • otherwise, you can create a single big thin volume, formatting it with XFS, mounting it and using libvirt to create a directory-based storage pool (creating VM disk images as plain file on the XFS filesystem).
|improve this answer|||||
  • "attaching it to the virtual machine". Do you mean during create the VM with virt-install? Thank you for your answer. – user878965 Feb 26 at 19:45
  • I mean by directly specifing the required thin volume in the xml file (or using a GUI as virt-manager to edit it) – shodanshok Feb 26 at 19:47
  • When I edit xml and try to run the VM via Cockpit, I get an error. For virt-manager, I can't even see the volume. – user878965 Feb 26 at 19:59
  • In virt-manager you should be able to select "browse local" and to manually select the right logical volume. Otherwise, you have to edit the domain xml file. – shodanshok Feb 26 at 20:44
  • I can't see any "browse local" option. All I can do is choose "Select or create custom storage" then select the pool. In the LVM pool only fat LVM volumes are listed. – user878965 Feb 26 at 20:53

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.