Add option to use cron within container

Dockerfile

@@ -3,8 +3,8 @@ MAINTAINER Jeroen Geusebroek <me@jeroengeusebroek.nl>
 
 ENV DEBIAN_FRONTEND="noninteractive" \
     TERM="xterm" \
-    APTLIST="apache2 php7.1 php7.1-curl php7.1-gd php7.1-gmp php7.1-mysql php7.1-xml php7.1-xmlrpc php7.1-mbstring php7.1-zip git-core" \
+    APTLIST="apache2 php7.1 php7.1-curl php7.1-gd php7.1-gmp php7.1-mysql php7.1-xml php7.1-xmlrpc php7.1-mbstring php7.1-zip git-core cron" \
-    REFRESHED_AT='2017-11-09'
+    REFRESHED_AT='2018-03-16'
 
 RUN echo "force-unsafe-io" > /etc/dpkg/dpkg.cfg.d/02apt-speedup &&\
     echo "Acquire::http {No-Cache=True;};" > /etc/apt/apt.conf.d/no-cache && \

README.md

@@ -43,26 +43,35 @@ Please NOTE that the volume is optional. Only necessary when you have special co
 
 You should now be able to reach the spotweb interface on port 80.
 
-### Automatic retreiving of new spots
+### Automatic retrieval of new spots
-
+To enable automatic retrieval, you need to setup a cronjob on either the docker host or within the container.
-To enable automatic retreiving, you need to setup a cronjob on the docker host.
+#### Automatic retrieval of new spots on the docker host
+To enable automatic retrieval, you need to setup a cronjob on the docker host.
 
 	*/15 * * * * docker exec spotweb su -l www-data -s /usr/bin/php /var/www/spotweb/retrieve.php >/dev/null 2>&1
 
 This example will retrieve new spots every 15 minutes.
+#### Automatic retrieval of new spots from within the container
+To enable automatic retrieval from within the container, use the `SPOTWEB_CRON_RETRIEVE` variable to specify the cron timing for retrieval. For example as additional parameter to the `docker run` command:
+
+    -e SPOTWEB_CRON_RETRIEVE='*/15 * * * *'
+
 
 ### Updates
 
 The container will try to auto-update the database when a newer version is released.
 
 ### Environment variables
-
+| Variable | Function |
-* `TZ` The timezone the server is running in. Defaults to `Europe/Amsterdam`.
+| --- | --- |
-* `SPOTWEB_DB_TYPE` Database type. Use `pdo_mysql` for MySQL.
+| `TZ` | The timezone the server is running in. Defaults to `Europe/Amsterdam`. |
-* `SPOTWEB_DB_HOST` The hostname / IP of the database server.
+| `SPOTWEB_DB_TYPE` | Database type. Use `pdo_mysql` for MySQL. |
-* `SPOTWEB_DB_NAME` The database used for spotweb.
+| `SPOTWEB_DB_HOST` | The hostname / IP of the database server. |
-* `SPOTWEB_DB_USER` The database server username.
+| `SPOTWEB_DB_NAME` | The database used for spotweb. |
-* `SPOTWEB_DB_PASS` The database server password.
+| `SPOTWEB_DB_USER` | The database server username. |
+| `SPOTWEB_DB_PASS` | The database server password. |
+| `SPOTWEB_CRON_RETRIEVE` | Cron schedule for article retrieval. E.g. `'*/15 * * * *'` for every fifteen minutes.|
+| `SPOTWEB_CRON_CACHE_CHECK` | Cron schedule for article cache sanity check. E.g. `'10 */1 * * *'` for 10 minutes after every hour. |
 
 ## License
 

entrypoint.sh

@@ -32,6 +32,18 @@ TZ=${TZ:-"Europe/Amsterdam"}
 echo -e "Setting (PHP) time zone to ${TZ}\n"
 sed -i "s#^;date.timezone =.*#date.timezone = ${TZ}#g"  /etc/php/7.*/*/php.ini
 
+if [[ -n "$SPOTWEB_CRON_RETRIEVE" || -n "$SPOTWEB_CRON_CACHE_CHECK" ]]; then
+    ln -sf /proc/$$/fd/1 /var/log/stdout
+    service cron start
+	if [[ -n "$SPOTWEB_CRON_RETRIEVE" ]]; then
+        echo "$SPOTWEB_CRON_RETRIEVE su -l www-data -s /usr/bin/php /var/www/spotweb/retrieve.php >/var/log/stdout 2>&1" > /etc/crontab
+	fi
+	if [[ -n "$SPOTWEB_CRON_CACHE_CHECK" ]]; then
+        echo "$SPOTWEB_CRON_CACHE_CHECK su -l www-data -s /usr/bin/php /var/www/spotweb/bin/check-cache.php >/var/log/stdout 2>&1" >> /etc/crontab
+	fi
+    crontab /etc/crontab
+fi
+
 # Run database update
 /usr/bin/php /var/www/spotweb/bin/upgrade-db.php >/dev/null 2>&1
 
@@ -41,4 +53,4 @@ rm -rf /run/apache2/apache2.pid
 # Enabling PHP mod rewrite
 /usr/sbin/a2enmod rewrite && /etc/init.d/apache2 restart
 
-tail -F /var/log/apache2/*
+tail -F /var/log/apache2/* /dev/stdout /dev/stderr