run again as root, docker user has equivalent rights like root

Author: christophdb

CHANGELOG.md

@@ -3,7 +3,6 @@
 ## 1.6.0 (12.05.2025)
 
 - updated software versions and debian base image
-- run as non root
 
 ## 1.5.4 (10.02.2025)
 

Dockerfile

@@ -5,7 +5,6 @@ FROM ${BASE_IMAGE} as build-image
 ARG RCLONE_VERSION="v1.69.2"
 ARG RESTIC_VERSION="0.18.0"
 ARG DOCKER_VERSION="28.1.1"
-ENV SUPERCRONIC_VERSION="v0.2.33"
 
 RUN apt-get update && apt-get install --no-install-recommends -y \
 unzip \
@@ -26,14 +25,6 @@ RUN tar --extract --file docker-${DOCKER_VERSION}.tgz --directory /tmp/ --strip-
 
 FROM ${BASE_IMAGE} as runtime-image
 
-ARG USER_ID=1000
-ARG GROUP_ID=1000
-
-RUN groupadd -g ${GROUP_ID} appuser && \
-    useradd -u ${USER_ID} -g appuser -s /bin/sh -d /home/appuser appuser && \
-    mkdir -p /home/appuser && \
-    chown -R appuser:appuser /home/appuser
-
 RUN \
     apt-get update \
     && apt-get upgrade -y \
@@ -44,40 +35,34 @@ RUN \
         msmtp \
         tree \
         fuse \
+        cron \
         ca-certificates \
         gzip \
         jq \
         openssh-client \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
 
-# Install supercronic (instead of cron)
-RUN curl -fsSLO "https://github.com/aptible/supercronic/releases/download/${SUPERCRONIC_VERSION}/supercronic-linux-amd64" && \
-    chmod +x supercronic-linux-amd64 && \
-    mv supercronic-linux-amd64 /usr/local/bin/supercronic
-
+# get rclone and restic from build-image
 COPY --from=build-image /bin/rclone /bin/rclone
 COPY --from=build-image /bin/restic /bin/restic
 COPY --from=build-image /tmp/docker /usr/local/bin/docker
 
-RUN mkdir -p /local /var/log/restic /var/spool/cron/crontabs && \
-    touch /var/log/cron.log /var/log/restic/backup.log /var/log/restic/lastrun.log && \
-    chown -R appuser:appuser /local /var/log /var/spool/cron/crontabs && \
-    chmod +x /bin/rclone /bin/restic /usr/local/bin/docker
+RUN mkdir -p /local /var/log/restic \
+    && touch /var/log/cron.log \
+    && touch /var/log/restic/backup.log \
+    && touch /var/log/restic/lastrun.log \
+    && chmod +x /bin/rclone /bin/restic /usr/local/bin/docker
+
+# /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 /bin/entry.sh
 COPY log.sh /bin/log.sh
 COPY pre-default.sh /bin/pre-default.sh
-COPY crontab /var/spool/cron/crontabs/appuser
-
-RUN chmod +x /bin/backup /bin/check /bin/entry.sh /bin/log.sh /bin/pre-default.sh && \
-    chown appuser:appuser /var/spool/cron/crontabs/appuser && \
-    chmod 600 /var/spool/cron/crontabs/appuser
-
-VOLUME /data
+RUN chmod +x /bin/backup /bin/check /bin/entry.sh /bin/log.sh /bin/pre-default.sh
 
-USER appuser:appuser
 ENTRYPOINT ["/bin/entry.sh"]
-CMD ["supercronic", "/var/spool/cron/crontabs/appuser"]
+CMD ["cron", "-f", "-L", "2"]