zfs-rclone-backup

#!/bin/bash

volume=$3
server=$1
pool=$2
frequency=$4

if [ $frequency == "daily" ]; then
    lastsnap=$(zfs list $pool/$volume -t snapshot -o name -s creation -H 2>/dev/null | xargs zfs holds -H 2>/dev/null | grep backup-rclone | awk '{printf "%s\n",$1}' | tail -n 1)
    if [ -z $lastsnap ]; then
        echo "Could not find a recent snapshot with backup-rclone hold"
        exit 55
    fi
elif [ $frequency == "monthly" ]; then
    lastsnap=$(zfs list $pool/$volume -t snapshot -o name -s creation -H 2>/dev/null | xargs zfs holds -H 2>/dev/null | grep -E "backup-rclone-(monthly|yearly)" | awk '{printf "%s\n",$1}' | tail -n 1)
    if [ -z $lastsnap ]; then
        echo "Could not find a recent snapshot with backup-rclone hold"
        exit 55
    fi
elif [ $frequency == "yearly" ]; then
    lastsnap=$(zfs list $pool/$volume -t snapshot -o name -s creation -H 2>/dev/null | xargs zfs holds -H 2>/dev/null | grep backup-rclone-$frequency | awk '{printf "%s\n",$1}' | tail -n 1)
fi

newsnap=$(zfs list -t snapshot $pool/$volume -o name -s creation -H | tail -n1)

zfs hold backup-rclone-$frequency $newsnap
if [ $frequency == "yearly" ]; then
    nice zfs send -c -w -v $newsnap 2>/root/zfssend-$volume.log | nice rclone --low-level-retries 99999 --retries-sleep 30m --config=/etc/rclone.conf --log-file=/root/rclonezfs-$volume.log rcat server-backup-crypt:zfs/$server/$newsnap-$frequency
else
    nice zfs send -c -w -v -i $lastsnap $newsnap 2>/root/zfssend-$volume.log | nice rclone --low-level-retries 99999 --retries-sleep 30m --config=/etc/rclone.conf --log-file=/root/rclonezfs-$volume.log rcat server-backup-crypt:zfs/$server/$newsnap-$frequency
fi

if [ $? == 0 ]; then
    if [ $frequency == "yearly" ]; then
        if [ $lastsnap ]; then
            zfs list $pool/$volume -t snapshot -o name -s creation -H 2>/dev/null | xargs zfs holds -H 2>/dev/null | grep backup-rclone-monthly | awk '{printf "%s\n",$1}' | xargs zfs release backup-rclone-monthly
            zfs list $pool/$volume -t snapshot -o name -s creation -H 2>/dev/null | xargs zfs holds -H 2>/dev/null | grep backup-rclone-daily | awk '{printf "%s\n",$1}' | xargs zfs release backup-rclone-daily
            zfs list $pool/$volume -t snapshot -o name -s creation -H 2>/dev/null | xargs zfs holds -H 2>/dev/null | grep backup-rclone-yearly | sed -e '${d;}' | awk '{printf "%s\n",$1}' | xargs zfs release backup-rclone-yearly
        fi
    elif [ $frequency == "monthly" ]; then
        zfs holds -H $lastsnap | grep -v "backup-rclone-daily" | awk '{printf "%s\n",$2}' | xargs -i zfs release "{}" $lastsnap
    elif [ $frequency == "daily" ]; then
        zfs list $pool/$volume -t snapshot -o name -s creation -H 2>/dev/null | xargs zfs holds -H 2>/dev/null | grep backup-rclone-daily | sed -e '${d;}' | awk '{printf "%s\n",$1}' | xargs zfs release backup-rclone-daily
    fi
else
    zfs release backup-rclone-$frequency $newsnap
    echo "Error sending dataset"
    exit 69
fi