I'm trying to run some PHP scripts automatically and want to have cron running once the container starts. Below is my current Dockerfile but upon running the docker-compose up -d command, the PHP container crashes immediately and I get the errors Cannot start service composer: Cannot link to a non running container and Cannot start service apache: Cannot link to a non running container which makes sense, because the PHP container already crashed. I've also tried CMD ["cron", "-f"] in place of CMD cron start && tail -f /var/log/cron.log and all the containers run, and the test job is executed, but I get a
503 service unavailable error when trying to access the app. From what I've read this is because cron is running in the foreground and blocking PHP.
Dockerfile
FROM php:7.4.2-fpm-buster
RUN apt-get update && apt-get install -y \
freetds-bin \
freetds-dev \
freetds-common \
libct4 \
libsybdb5 \
tdsodbc \
libfreetype6-dev \
libjpeg62-turbo-dev \
libmcrypt-dev \
libpng-dev \
libldap2-dev \
libpq-dev \
zlib1g-dev \
libc-client-dev \
libzip-dev \
zip \
cron
RUN ln -s /usr/lib/x86_64-linux-gnu/libsybdb.a /usr/lib/
RUN ln -s /usr/lib/x86_64-linux-gnu/libpq-fe.h /usr/lib/
RUN docker-php-ext-install pdo pdo_mysql pdo_dblib pdo_pgsql gd zip
RUN apt-get install unixodbc unixodbc-dev -y \
&& docker-php-ext-configure pdo_odbc --with-pdo-odbc=unixODBC,/usr \
&& docker-php-ext-install pdo_odbc
COPY ./freetds.conf /etc/freetds/freetds.conf
COPY ./odbc.ini /etc/odbc.ini
COPY ./odbcinst.ini /etc/odbcinst.ini
COPY ./php.ini /usr/local/etc/php
# Install Composer
RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
RUN mkdir /var/www/html/files && chown -R www-data:www-data /var/www/html/files && chmod -R 755 /var/www/html/files
RUN mkdir /var/www/html/exports && chown -R www-data:www-data /var/www/html/exports && chmod -R 755 /var/www/html/exports
RUN mkdir /var/www/html/scripts && chown -R www-data:www-data /var/www/html/scripts && chmod -R 755 /var/www/html/scripts
# copying cronjobs, a file I created with a test cronjob to /etc
COPY ./cronjobs /etc
# using the cronjobs file I created as the crontab
RUN crontab /etc/cronjobs
CMD cron start && tail -f /var/log/cron.log
EXPOSE 9000
docker-compose.yml (some info redacted ... the xxx parts)
version: "3.7"
services:
php:
build: './php/'
links:
- 'mysql'
network_mode: "bridge"
ports:
- "xxxx:9000"
volumes:
- ./www/:/var/www/html/
- files:/var/www/html/files
apache:
build: './apache/'
depends_on:
- php
links:
- 'php'
network_mode: "bridge"
ports:
- "xxxx:80"
volumes:
- ./www/:/var/www/html/
- files:/var/www/html/files
mysql:
image: mysql:latest
command: --init-file /docker-entrypoint-initdb.d/init.sql
environment:
MYSQL_ROOT_PASSWORD: 'xxx'
MYSQL_USER: 'xxx'
MYSQL_PASS: 'xxx'
ports:
- "xxxx:3306"
network_mode: "bridge"
volumes:
- data:/var/lib/mysql
- ./mysql/init:/docker-entrypoint-initdb.d
phpmyadmin:
depends_on:
- mysql
environment:
PMA_HOST: mysql
PMA_PORT: 3306
image: phpmyadmin/phpmyadmin
links:
- mysql
network_mode: "bridge"
ports:
- "xxxx:80"
composer:
container_name: composer
depends_on:
- php
links:
- 'php'
image: composer
network_mode: "bridge"
volumes:
- ./www:/var/www/html/
command: composer install --ignore-platform-reqs && composer require phpoffice/phpspreadsheet
networks:
default:
external:
name: bridge
volumes:
data:
files:
cronjobs file
# Edit this file to introduce tasks to be run by cron.
#
# Each task to run has to be defined through a single line
# indicating with different fields when the task will be run
# and what command to run for the task
#
# To define the time you can provide concrete values for
# minute (m), hour (h), day of month (dom), month (mon),
# and day of week (dow) or use '*' in these fields (for 'any').
#
# Notice that tasks will be started based on the cron's system
# daemon's notion of time and timezones.
#
# Output of the crontab jobs (including errors) is sent through
# email to the user the crontab file belongs to (unless redirected).
#
# For example, you can run a backup of all your user accounts
# at 5 a.m every week with:
# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
#
# For more information see the manual pages of crontab(5) and cron(8)
#
# m h dom mon dow command
42 22 * * * /usr/local/bin/php /var/www/html/scripts/test.php