#!/bin/bash
# /usr/local/sbin/backup-script-wrapper
# ---
#  {{ ansible_managed }}
# ---

NAME=$(basename "$0")

pools=$(zpool list -H | cut -f1)
if [ $? -ne 0 ]; then
	echo "$NAME: Failed to list ZFS pools, aborting!"
	exit 1
fi
if [ -z "$pools" ]; then
	# No pools found, nothing to do, ok.
	exit 0
fi

wait_for_scrub_done() {
	while true; do
		zpool status "$1" 2>/dev/null | fgrep 'scrub in progress' >/dev/null
		[ $? -eq 0 ] || return 0
		sleep 60
	done
}

echo "Scrubbing ZFS storage pools on $(hostname -f):"
echo

zpool list
echo

for pool in $pools; do
	echo "Scrubbing ZFS storage pool \"$pool\" ..."
	echo -n "Started: "; date
	zpool scrub "$pool"
	if [ $? -eq 0 ]; then
		wait_for_scrub_done "$pool"
		echo -n "Done: "; date
	else
		echo "Failed to start scrubbing!?"
		zpool scrub -s "$pool" >/dev/null 2>&1
		sleep 5
	fi
	echo
done

# Show status of ZFS storage pools
zpool status