backup all Zones on SmartOS

#!/bin/bash

# based on http://blog.beulink.org/smartos-migrate-backup-and-restore-kvm-vms/

ALIASES=($(vmadm list -o alias | awk '{if(NR>1)print}'))
UUIDS=($(vmadm list -o uuid | awk '{if(NR>1)print}'))
BACKUP_PATH=/zones/backup

for i in "${!UUIDS[@]}"
do
    UUID=${UUIDS[$i]}
    ALIAS=${ALIASES[$i]}
    LABEL=${ALIAS}_${UUID}
    echo "backup ${LABEL}"
    vmadm get ${UUID} | json zfs_filesystem disks
    mkdir -p $BACKUP_PATH/${LABEL}
    vmadm get ${UUID} > $BACKUP_PATH/${LABEL}/${LABEL}.json
    vmadm stop ${UUID}
    zfs snapshot zones/${UUID}@sending
    zfs send -p zones/${UUID}@sending > $BACKUP_PATH/${LABEL}/${LABEL}.zfs
    zfs destroy zones/${UUID}@sending   
    tar -czf $BACKUP_PATH/${LABEL}/${LABEL}.zfs.tar.gz $BACKUP_PATH/${LABEL}/${LABEL}.zfs
    openssl dgst -md5 $BACKUP_PATH/${LABEL}/${LABEL}.zfs > $BACKUP_PATH/${LABEL}/${LABEL}.zfs.md5
    rm $BACKUP_PATH/${LABEL}/${LABEL}.zfs
done