virsh-snap.sh: create and revert external libvirt snapshots easily

Installation

• Download script:

  wget -P ~/.local/bin https://github.com/shvchk/virsh-external-snapshots/raw/main/virsh-snap.sh

• Make it executable:

  chmod +x ~/.local/bin/virsh-snap.sh

Usage

• Create snapshot named snapshot-1 of vm-42:

  virsh-snap.sh create vm-42 snapshot-1

  Snapshot name is optional, by default current date and time is used as a name, e.g. 2022.07.29_23.55.12.

• List snapshots of vm-42:

  virsh-snap.sh list vm-42

  Note that this is not the same as virsh snapshot-list. Snapshots are created without metadata and won't be shown with virsh snapshot-list.

• Revert and delete snapshot-1 of vm-42:

  virsh-snap.sh revert vm-42 snapshot-1

• Revert, but don't delete snapshot-1 of vm-42:

  virsh-snap.sh soft-revert vm-42 snapshot-1

  This allows to use this snapshot later with unrevert.

• Undo revert of a snapshot-1 of vm-42, i.e. make it active again:

  virsh-snap.sh unrevert vm-42 snapshot-1

• Delete snapshot snapshot-1 of vm-42:

  virsh-snap.sh delete vm-42 snapshot-1

  Might be useful if you change your mind after soft-revert.

• Show help:

  virsh-snap.sh help

  virsh-snap.sh: create and revert external libvirt snapshots easily
  
  Usage: virsh-snap.sh <action> <domain> [snapshot name]
  
  
  Actions:
  --------
  create, c           Create snapshot
                      If no snapshot name is provided, current date and time is used
  
  list, ls, l         List snapshots
  
  disks                Show active disks
  
  revert, rev, r      Revert snapshot and delete it (same as soft-revert + delete)
  
  soft-revert,
  srev, sr            Revert snapshot without deleting it (allows unrevert)
  
  unrevert,
  unrev, ur           Unrevert snapshot, i.e. make soft-reverted snapshot active again
  
  delete, del, rm     Delete snapshot
  
  help, h             This message
  
  
  Snapshots are created without metadata, so they won't be shown with `virsh snapshot-list`