[GitHub] [cloudstack] weizhouapache commented on pull request #4739: Allow creating snapshot from VM snapshot

[GitBox <gi...@apache.org>]

weizhouapache commented on pull request #4739:
URL: https://github.com/apache/cloudstack/pull/4739#issuecomment-788346365


   > I am struggling to see the use-case. Can you explain why you want this, @ravening?
   
   for stopped vms, we can create volume snapshot no matter if kvm.snapshot.enabled is true or false.
   
   for running vms, if kvm.snapshot.enabled is false, we cannot create volume snapshot
   if kvm.snapshot.enabled is true, we can create volume snapshot by following steps in cloudstack if image is qcow2 format.
   (1) create vm snapshot (vm will be paused)
   (2) create volume snapshot from the vm snapshot
   
   If we already have a vm snapshot, even if kvm.snapshot.enabled is false, we should be able to create volume snapshot from vmsnapshot (step 2 above), as vm will not be paused and vm image will not be touched.


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