docker-volume-backup/entrypoint.sh

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#!/bin/sh
# Copyright 2021 - Offen Authors <hioffen@posteo.de>
# SPDX-License-Identifier: MPL-2.0
set -e
if [ ! -d "/etc/dockervolumebackup/conf.d" ]; then
BACKUP_CRON_EXPRESSION="${BACKUP_CRON_EXPRESSION:-@daily}"
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echo "Installing cron.d entry with expression $BACKUP_CRON_EXPRESSION."
echo "$BACKUP_CRON_EXPRESSION backup 2>&1" | crontab -
else
echo "/etc/dockervolumebackup/conf.d was found, using configuration files from this directory."
crontab -r && crontab /dev/null
for file in /etc/dockervolumebackup/conf.d/*; do
source $file
BACKUP_CRON_EXPRESSION="${BACKUP_CRON_EXPRESSION:-@daily}"
echo "Appending cron.d entry with expression $BACKUP_CRON_EXPRESSION and configuration file $file"
(crontab -l; echo "$BACKUP_CRON_EXPRESSION /bin/sh -c 'set -a; source $file; set +a && backup' 2>&1") | crontab -
done
fi
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echo "Starting cron in foreground."
crond -f -d 8