Configure CRON inside container

Author: jdecool

.docker/Dockerfile

@@ -1,7 +1,7 @@
 FROM phpdaily/php:8.1.0-dev-fpm-alpine3.12
 
 # System dependencies
-RUN apk add --update bash sqlite
+RUN apk add --update bash sqlite supervisor
 
 # Install Composer
 RUN wget https://getcomposer.org/composer.phar \
@@ -11,3 +11,8 @@ RUN wget https://getcomposer.org/composer.phar \
 # Install Symfony CLI
 RUN wget https://get.symfony.com/cli/installer -O - | bash \
     && mv /root/.symfony/bin/symfony /usr/local/bin/symfony
+
+RUN echo '0 0 * * * cd /var/www/phpversions && bin/console synchronize >> /var/www/phpversions/var/log/cron.log' >> /etc/crontabs/root
+
+COPY conf/supervisor.conf /etc/supervisor/phpversions.conf
+CMD ["/usr/bin/supervisord", "-c", "/etc/supervisor/phpversions.conf"]

.docker/conf/supervisor.conf

@@ -0,0 +1,13 @@
+[supervisord]
+nodaemon=true
+
+[program:cron]
+command=/usr/sbin/crond -f -l 8
+stdout_logfile=/dev/stdout
+stderr_logfile=/dev/stderr
+stdout_logfile_maxbytes=0
+stderr_logfile_maxbytes=0
+autorestart=true
+
+[program:php-fpm]
+command=docker-php-entrypoint php-fpm

.docker/entrypoint.sh

@@ -0,0 +1,9 @@
+#/bin/sh
+
+set -e
+
+echo "* * * * * cd /var/www/phpversions && bin/console synchronize >> var/log/cron.log" >> /etc/crontabs/root
+
+/usr/sbin/crond
+
+/usr/local/bin/docker-php-entrypoint "$@"

docker-compose.yaml

@@ -1,7 +1,9 @@
 version: '3.7'
 services:
     nginx:
-        image: nginx:1.19-alpine
+        image: nginx:stable-alpine
+        depends_on:
+            - fpm
         ports:
             - 80:80
         volumes: