backup a volume

backup.sh

#!/bin/bash
set -eou pipefail
blockdev="$1"
name="$2"

TMP="$(mktemp -d /tmp/$(date -I).$2.XXXXXXXXXX )"

FILELIST="$TMP"/"$name".filelist.txt

# Make the blockdev available in /tmp/name
sudo cp -a "$blockdev" "$TMP"/"$name"
sudo chmod 664 "$TMP"/"$name"

# Mount it, and make a file list
sudo mkdir "$TMP"/"$name".mounted
sudo mount "$TMP"/"$name" "$TMP"/"$name".mounted
cd "$TMP"/"$name".mounted
sudo find . | sort --compress-program=gzip > "$FILELIST"

# Unmount
sudo umount "$TMP"/"$name".mounted
sudo rmdir "$TMP"/"$name".mounted

# Use archivemount, then gupload, for filelist
gupload "$FILELIST"
rm "$FILELIST"

# Upload image
gupload "$TMP"/"$name"

# Remove disk device
sudo rm "$TMP"/"$name"