simple-backup-snapshot.sh

#!/bin/bash
find_list() {
  a="$(zfs list -t filesystem,volume -s origin -H -o name,origin -r $1)"
  grep -P -- '-$' <<< "$a" | cut -f1
  grep -Pv -- '-$' <<< "$a"
}

SSH() {
  ssh $remote_path $@
}

send_command() {
  old=$3
  has_mount=$2
  new=$1
  name=$(cut -f1 -d@ <<< "$new")

  (
    echo sending $(echo $new | cut -f 1 -d @) $([ ! -z "$old" ] && echo with incrimental $old)
    SSH zfs create -p $trpool/$(dirname $name)
    zfs send -Lc $([ ! -z "$old" ] && echo -i $old ) $new | #pv -s $(zfs list -t all -Ho used $new) |
     SSH "zfs receive -Fu" $( [ "$has_mount" -eq 0 ] && echo -o mountpoint=none ) "$trpool/$name"
  ) < /dev/null
}

send() {
  previous=$2
  has_mount=$([[ "$(zfs get volsize zpool -Ho value)" != '-' ]]; echo $?)
  zfs list -t snapshot -Ho name $1 | while read snapshot; do
    send_command $snapshot $has_mount $previous
    previous=$snapshot
  done
}

remote_path=192.168.22.225
rpool=$(SSH zpool list -Ho name)


for zpool in $(zpool list -H -o name); do
  trpool=$rpool/backups/$(hostname)
  SSH zfs create -p $trpool
  find_list $zpool | while read l; do
    send $l
  done
done