add initial source

src/entrypoint.sh

@@ -0,0 +1,35 @@
+#!/bin/sh
+
+# Copyright 2021 - Offen Authors <hioffen@posteo.de>
+# SPDX-License-Identifier: MPL-2.0
+
+# Portions of this file are taken from github.com/futurice/docker-volume-backup
+# See NOTICE for information about authors and licensing.
+
+set -e
+
+# Write cronjob env to file, fill in sensible defaults, and read them back in
+cat <<EOF > env.sh
+BACKUP_SOURCES="${BACKUP_SOURCES:-/backup}"
+BACKUP_CRON_EXPRESSION="${BACKUP_CRON_EXPRESSION:-@daily}"
+BACKUP_FILENAME=${BACKUP_FILENAME:-"backup-%Y-%m-%dT%H-%M-%S.tar.gz"}
+
+BACKUP_RETENTION_DAYS="${BACKUP_RETENTION_DAYS:-}"
+
+AWS_S3_BUCKET_NAME="${AWS_S3_BUCKET_NAME:-}"
+AWS_ENDPOINT="${AWS_ENDPOINT:-s3.amazonaws.com}"
+
+GPG_PASSPHRASE="${GPG_PASSPHRASE:-}"
+EOF
+chmod a+x env.sh
+source env.sh
+
+mc alias set backup-target "https://$AWS_ENDPOINT" "$AWS_ACCESS_KEY_ID" "$AWS_SECRET_ACCESS_KEY"
+
+# Add our cron entry, and direct stdout & stderr to Docker commands stdout
+echo "Installing cron.d entry with expression $BACKUP_CRON_EXPRESSION"
+echo "$BACKUP_CRON_EXPRESSION backup 2>&1" | crontab -
+
+# Let cron take the wheel
+echo "Starting cron in foreground"
+crond -f -l 8