#!/bin/bash
###################################################################
###                                                             ###
###   Move a running guest's virtual disk file using virsh's    ###
###                 blockcopy --pivot feature.                  ###
###                                                             ###
###    - Works for guests with a single virtual disk            ###
###    - Still requires manual editing of the domain's dumped   ###
###      xml file with the new absolute path of the virtual     ###
###      disk before running virsh define and removing the      ###
###      original virtual disk. (Will try to implement these    ###
###      steps within the script in the future)                 ###
###                                              /mhutchinson   ###
###                                   Last updated 11-18-2024.  ###
###                                                             ###
###################################################################

echo -e "Usage: $0 DOMNAME"

DISKLIST=$(virsh domblklist $1 --details | grep -v cdrom | grep file | awk '{ print $4 }')

echo -e "Disk list:\n"
echo -e "$DISKLIST\n"
for i in $DISKLIST; do
  echo "just filename:";
  basename $i ; JUSTFILENAME=$(basename $i)
  OLDFULLPATH=$i;
  echo "full path again:" $OLDFULLPATH;
  read -p 'Enter NEW ABSOLUTE PATH (w/o filename):' NEWPATH;
  echo "NEWPATH is "$NEWPATH;
  echo "NEW ABSOLUTE PATH with FILENAME is "$NEWPATH"/"$JUSTFILENAME;
  echo "DOM's xml file has been dumped to this dir. Remember to change it AFTER the pivot completes." ;
  virsh dumpxml --inactive $1 > $1.xml;
  virsh undefine $1;
  echo "Starting blockcopy on disk "$JUSTFILENAME"...";
  virsh blockcopy --domain $1 --path $OLDFULLPATH --dest $NEWPATH"/"$JUSTFILENAME --wait --verbose --pivot;
  echo "Now you must change to the new abs path in the "$1".xml file, save it, then run virsh define "$1".xml and remove the old file."
  echo "done"
done