Add cron job to automatically update libc-database

Author: blukat29

Dockerfile

@@ -3,5 +3,18 @@ FROM tiangolo/uwsgi-nginx-flask:flask-python3.5
 # Remove sample application included in the base image.
 RUN rm /app/main.py /app/uwsgi.ini
 
+# Install cron
+RUN apt-get update \
+    && apt-get install -y cron \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install cron job
+COPY crontab /etc/cron.d/libc-update
+RUN chmod 0644 /etc/cron.d/libc-update
+RUN touch /var/log/libcdb.log
+
+# Register cron to supervisor
+COPY cron.conf /etc/supervisor/conf.d/cron.conf
+
 COPY app /app
 COPY libc-database /libc-database

cron.conf

@@ -0,0 +1,12 @@
+[program:cron]
+command = /usr/sbin/cron -f
+user = root
+autostart = true
+
+[program:cron_output]
+command = tail -f /var/log/libcdb.log
+autostart = true
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0
+stderr_logfile=/dev/stderr
+stderr_logfile_maxbytes=0

crontab

@@ -0,0 +1,3 @@
+# Update libc-database every day
+# min hour day mon week  user  cmd
+  0   12   *   *   *     root  cd /libc-database && (./get; echo -n "### Update done "; date) >> /var/log/libcdb.log 2>&1

run.sh

@@ -1,3 +1,3 @@
 git submodule update --init
 sudo docker build -t libc .
-sudo docker run --rm -p31337:80 -it libc
+sudo docker run --name ll --rm -p31337:80 -it libc