#!/bin/csh

## config section
set vm             = $1
set vm_dataset     = "zroot/vms"
set backup_dataset = "tank/backup/bhyve"
set backup_date    = `date "+%Y-%m-%d_%H:%M"`

# Snapshot all VMs
echo ""
echo "################# SNAPSHOT VM #################"

## stopping vm
vm stop $vm

## give vm time to shut down properly
sleep 15

## snapshot vm
echo "Snapshot VM: $vm" 
zfs snapshot $vm_dataset/$vm@$backup_date
echo ""

## start VM
vm start $vm
echo ""

# Backup all VM snapshots
echo ""
echo "################## BACKUP VM ##################"

## Create ZFS dataset
echo "Creating destination dataset for $vm"
zfs create $backup_dataset/$vm-$backup_date

## Send snapshot to backup destination
echo "Backup VM: $vm" 
zfs send $vm_dataset/$vm@$backup_date | zfs recv -F $backup_dataset/$vm-$backup_date
echo ""

## Delete snapshot 
zfs destroy $vm_dataset/$vm@$backup_date

# report done
echo ""
echo "############### ALL DONE THANKS ###############"
echo ""