#!/bin/sh

# simple script to clone a virtual machine (vmware)
# to another datastore/folder.

# usage: ./clone_vm.sh <source path> <destination path>
# source path must be a directory and contain a virtual machine (at least a single .vmdk file)
# destination path must a directory, preexist and be empty (to avoid overwriting another machine)

# sources:
# https://serverfault.com/questions/372526/move-vmware-esxi-vm-to-new-datastore-preserve-thin-provisioning
# https://communities.vmware.com/thread/498408

echo; echo "**** Simple virtual machine cloning script ****"; echo
sleep 0.5; echo "Before you continue all snapshots need to be deleted"
echo "and all virtual disks (.vmdk files) need to be consolidated."; echo
echo "And please, for your own sake, make sure the VM is powered down!"; echo
echo "Do you want to continue? [Y]"
read a
if [ -z $a ] || [ $a == "Y" ] || [ $a == "y" ]; then
  if [ $1 ] && [ $2 ]; then
    if [ -d $1 ]; then
      if [ -r $1 ]; then
        if [ -n "$(ls -A $1)" ]; then
          source=${1%/}
          if [ -d $2 ]; then
            if [ -w $2 ]; then
              if [ -z "$(ls -A $2)" ]; then
                destination=${2%/}
                sleep 0.5; echo "INFO: Preflight checks good. Commencing cloning process."
                for disk in $(find "$source" -maxdepth 1 -type f | grep ".vmdk" | grep -v "flat.vmdk"); do
                  if [ -n "${disk##*delta*}" ]; then
                      echo "ERROR: You little rebel did not remove all snapshots. Failsave exit!"; exit 1
                  fi
                  #try the following to move a specific snapshot
                  #find . -maxdepth 1 -type f | grep "000030.vmdk"
                  sleep 0.5; echo "INFO: Cloning $disk to $destination"
                  vmkfstools -i $disk -d thin $destination/${disk##*/}
                  if [ $? -ne 0 ]; then
                    echo "ERROR: An error occured while cloning $disk to $destination."
                  fi
                done
                for file in $(find "$source" -maxdepth 1 -type f | grep -v ".vmdk"); do
                  sleep 0.5; echo "INFO: Copying $file to $destination"
                  cp "$file" "$destination"
                  if [ $? -ne 0 ]; then
                    echo "ERROR: An error occured while copying $file to $destination."
                  fi
                done
              else
                sleep 0.5; echo "ERROR: Destination path is not empty ($2)."; exit 1
              fi
            else
              sleep 0.5; echo "ERROR: Destination path is not writeable ($2)."; exit 1
            fi
          else
            sleep 0.5; echo "ERROR: Destination path is not a directory ($2)."; exit 1
          fi
        else
          sleep 0.5; echo "ERROR: Source path empty ($1)."; exit 1
        fi
      else
        sleep 0.5; echo "ERROR: Source path is not readable ($1)."; exit 1
      fi
    else
      sleep 0.5; echo "ERROR: Source path is not a directory ($1)."; exit 1
    fi
  else
    sleep 0.5; echo "ERROR: Source and destination path must be given."; exit 1
  fi
else
  sleep 0.5; echo "ERROR: Mission aborted by user."
  exit 2
fi