initial commit

Dockerfile

@@ -0,0 +1,24 @@
+FROM ubuntu:18.04
+
+# See: https://unix.stackexchange.com/questions/433942/how-to-specify-extra-tz-info-for-apt-get-install-y-awscli
+RUN export TZ=Europe/London
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+
+# Prepare apt repos
+RUN apt-get update
+RUN apt-get install -y cron awscli
+
+# Create needed dirs and add files
+RUN mkdir /backup
+COPY backup.sh /usr/local/bin/backup
+COPY entry.sh /entry.sh
+
+# Prepare cron job
+RUN echo '0 3 * * *    /usr/local/bin/backup >> /var/log/backup.log 2>&1\n' > /etc/cron.d/backup-cron
+RUN chmod 0644 /etc/cron.d/backup-cron
+RUN crontab /etc/cron.d/backup-cron
+RUN touch /var/log/backup.log
+
+# Entry file tails cron job log to ensure container keeps running
+CMD ["/entry.sh"]
+

backup.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+set -e
+
+filename="backup.tar.gz"
+
+cd /backup
+
+echo "Creating archive..."
+echo $BACKUP_DIRS | tr " " "\n" > files.txt
+rm $filename 2>&1 || true
+tar --warning=no-file-changed -czf $filename -T files.txt 2>&1 || true
+
+echo "Uploading to Backblaze..."
+aws s3 cp $filename "s3://$BUCKET/$filename" --endpoint-url "$ENDPOINT"

entry.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+# Ensure cron jobs get access to environment variables set on the container
+printenv | grep -v "no_proxy" >> /etc/environment
+
+# start cron
+cron && tail -f /var/log/backup.log