Initial commit

Dockerfile

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+FROM alpine:latest as alpine
+RUN apk add --no-cache \
+    ca-certificates \
+    tzdata
+
+FROM busybox:glibc
+
+COPY --from=alpine /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
+COPY --from=alpine /usr/share/zoneinfo /usr/share/zoneinfo
+
+# Get restic executable
+ENV RESTIC_VERSION=0.9.5
+ADD https://github.com/restic/restic/releases/download/v${RESTIC_VERSION}/restic_${RESTIC_VERSION}_linux_amd64.bz2 /
+RUN bzip2 -d restic_${RESTIC_VERSION}_linux_amd64.bz2 && mv restic_${RESTIC_VERSION}_linux_amd64 /bin/restic && chmod +x /bin/restic
+
+RUN mkdir -p /mnt/restic /var/spool/cron/crontabs /var/log
+
+# /data is the dir where you have to put the data to be backed up
+VOLUME /data
+
+COPY backup.sh /bin/backup
+COPY check.sh /bin/check
+COPY entry.sh /entry.sh
+
+RUN touch /var/log/cron.log
+
+WORKDIR "/"
+
+ENTRYPOINT ["/entry.sh"]
+

backup.sh

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+#!/bin/sh
+
+start=`date +%s`
+echo "Starting Backup at $(date +"%Y-%m-%d %H:%M:%S")"
+echo "RESTIC_REPOSITORY: ${RESTIC_REPOSITORY}"
+echo "BACKUP_CRON: ${BACKUP_CRON}"
+echo "RESTIC_JOB_ARGS: ${RESTIC_JOB_ARGS}"
+echo "RESTIC_FORGET_ARGS: ${RESTIC_FORGET_ARGS}"
+
+restic backup /data ${RESTIC_JOB_ARGS}
+rc=$?
+echo "Finished backup at $(date)"
+if [[ $rc == 0 ]]; then
+    echo "Backup Successful" 
+else
+    echo "Backup Failed with status ${rc}"
+    restic unlock
+    kill 1
+fi
+
+if [ -n "${RESTIC_FORGET_ARGS}" ]; then
+    echo "Forget about old snapshots based on RESTIC_FORGET_ARGS = ${RESTIC_FORGET_ARGS}"
+    restic forget ${RESTIC_FORGET_ARGS}
+    rc=$?
+    echo "Finished forget at $(date)"
+    if [[ $rc == 0 ]]; then
+        echo "Forget Successfull"
+    else
+        echo "Forget Failed with Status ${rc}"
+        restic unlock
+    fi
+fi
+
+end=`date +%s`
+echo "Finished Backup at $(date +"%Y-%m-%d %H:%M:%S") after $((end-start)) seconds"

build.sh

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+#!/bin/sh
+
+docker build -t llehouerou/restic-backup .
+docker push llehouerou/restic-backup

check.sh

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+#!/bin/sh
+
+start=`date +%s`
+echo "Starting Check at $(date +"%Y-%m-%d %H:%M:%S")"
+echo "RESTIC_REPOSITORY: ${RESTIC_REPOSITORY}"
+echo "CHECK_CRON: ${CHECK_CRON}"
+echo "RESTIC_CHECK_ARGS: ${RESTIC_CHECK_ARGS}"
+
+restic check ${RESTIC_CHECK_ARGS}
+rc=$?
+echo "Finished check at $(date)"
+if [[ $rc == 0 ]]; then
+    echo "Backup Successful" 
+else
+    echo "Backup Failed with status ${rc}"
+    restic unlock
+    kill 1
+fi
+
+end=`date +%s`
+echo "Finished check at $(date +"%Y-%m-%d %H:%M:%S") after $((end-start)) seconds"

entry.sh

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+#!bin/sh
+echo "Starting container ..."
+restic snapshots
+rc=$?
+if [[ $rc != 0 ]]; then
+    echo "Restic repository '${RESTIC_REPOSITORY}' does not exists. Running restic init."
+    restic init
+fi
+
+echo "Setup backup cron job with cron expression BACKUP_CRON: ${BACKUP_CRON}"
+echo "${BACKUP_CRON} flock -n /tmp/backup.lockfile /bin/backup >> /var/log/cron.log 2>&1" > /var/spool/cron/crontabs/root
+echo "Setup check cron job with cron expression CHECK_CRON: ${CHECK_CRON}"
+echo "${CHECK_CRON} flock /tmp/backup.lockfile /bin/check >> /var/log/cron.log 2>&1" >> /var/spool/cron/crontabs/root
+
+cat /var/spool/cron/crontabs/root
+
+# Make sure the file exists before we start tail
+touch /var/log/cron.log
+
+# start the cron deamon
+crond
+
+echo "Container started."
+
+if [ -n "${RESTIC_BACKUPONSTART}" ]; then
+	flock -n /tmp/backup.lockfile /bin/backup
+fi
+
+tail -fn0 /var/log/cron.log