Initial commit.

crontab-example

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+# /etc/crontab: system-wide crontab
+# Unlike any other crontab you don't have to run the `crontab'
+# command to install the new version when you edit this file
+# and files in /etc/cron.d. These files also have username fields,
+# that none of the other crontabs do.
+
+SHELL=/bin/sh
+PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
+
+# m | h | day of month | month | day of week | user | command
+3     0         *          *          *        root   docker -H tcp://127.0.0.1:2375 exec  mysql-server /root/nettoyer_quotas.sh > /proc/1/fd/2 2>&1
+3     1         *          *          *        root   docker -H tcp://127.0.0.1:2375 exec  mysql-server sh -c "mysqldump --databases mysql -uroot -pXXXXXXXX > /mnt/dumps/mysql_dump-mysql_`date +\%d-\%m-\%Y`" > /proc/1/fd/2 2>&1
+13     1         *          *          *        root   docker -H tcp://127.0.0.1:2375 exec  mysql-server sh -c "mysqldump --databases gogs owncloud semanticscuttle -uroot -pXXXXXXXX > /mnt/dumps/mysql_dump_`date +\%d-\%m-\%Y`" > /proc/1/fd/2 2>&1

docker-compose.yml

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+version: "2.1"
+ 
+services:
+
+  cron:
+    image: cron:$VERSION_CRON
+    restart: always
+    network_mode: "host"
+    volumes:
+      - ./crontab:/etc/crontab:Z

start_or_update.sh

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+#!/bin/bash
+test -z $1 || HOST="_$1"
+test -z $2 || INSTANCE="_$2"
+if ! test -f ~/secrets.tar.gz.enc
+then
+    curl -o ~/secrets.tar.gz.enc "https://cloud.scimetis.net/s/${KEY}/download?path=%2F&files=secrets.tar.gz.enc"
+    if ! test -f ~/secrets.tar.gz.enc
+    then
+        echo "ERROR: ~/secrets.tar.gz.enc not found, exiting."
+        exit 1
+    fi
+fi
+openssl enc -aes-256-cbc -d -in ~/secrets.tar.gz.enc | tar -zxv --strip 2 secrets/docker-cron-global-stack${HOST}${INSTANCE}/crontab
+sudo chown root. crontab
+sudo chmod 644 crontab
+
+unset VERSION_CRON
+export VERSION_CRON=$(git ls-remote https://git.scimetis.net/yohan/docker-cron.git| head -1 | cut -f 1|cut -c -10)
+
+rm -rf ~/build
+mkdir -p ~/build
+git clone https://git.scimetis.net/yohan/docker-cron.git ~/build/docker-cron
+sudo docker build -t cron:$VERSION_CRON ~/build/docker-cron
+
+sudo -E bash -c 'docker-compose up -d --force-recreate'
+# --force-recreate is used to recreate container when crontab file has changed
+# We cannot remove the secrets files or restarting the container would become impossible
+# rm -f crontab
+rm -rf ~/build