Auto-rotate backup for Scaleway instances

scaleway-instance-auto-backup.sh

#!/usr/bin/env bash
# https://gist.github.com/ddebin/348e685fad7b03c347f3d3de96800ad9
# Auto-rotate backup for Scaleway instances, uses https://github.com/scaleway/scaleway-cli/
set -e
while getopts ":p:i:" FLAG; do
	case "${FLAG}" in
	p) PROFILE=${OPTARG} ;;
	i) INSTANCE_ID=${OPTARG} ;;
	:)
		echo "Option -${OPTARG} requires an argument."
		exit 2
		;;
	\?)
		echo "Invalid option: -${OPTARG}."
		exit 2
		;;
	esac
done
OPTIONS=()
if [ -n "${PROFILE}" ]; then
	OPTIONS=(-p "${PROFILE}")
fi
if [ -z "${INSTANCE_ID}" ]; then
	echo "Missing -i INSTANCE"
	exit 2
fi
echo -n "Backing up instance #${INSTANCE_ID}... "
IMAGE_ID=$(scw instance server backup "${INSTANCE_ID}" -w -o template="{{ .ID }}" "${OPTIONS[@]}")
echo "done"
SHORT_ID=$(echo "${INSTANCE_ID}" | cksum | cut -d" " -f1)
TAG="auto-backup-${SHORT_ID}"
for ID in $(scw instance image list tags="${TAG}" -o template="{{ .ID }}" "${OPTIONS[@]}"); do
	echo "Deleting old image #${ID}..."
	scw instance image delete "${ID}" with-snapshots=true -o human "${OPTIONS[@]}"
done
echo "Tagging image..."
scw instance image update "${IMAGE_ID}" tags.0="${TAG}" -o template="ID:{{ .Image.ID }} {{ .Image.Tags }} Name:{{ .Image.Name }}" "${OPTIONS[@]}"