Docker CRON Daemon container

Dockerfile for creating image with cron deamon on alpine linux. This image enables the end user to add additional packages on container start.

Usage

docker run \
-d \
--name crond \
-e 'ADD_PACKAGES=<additional packages>' \
-e 'CRON_STRINGS=* * * * * root /scripts/my-script.sh' \
-v /path/to/custom/scripts:/scripts \
-v /path/to/custom/crontab:/etc/cron.d \
maschel/crond

Parameters

• ADD_PACKAGES (optional): space seperated list of (APK) packages to install before the container is started (mind the '').
• CRON_STRINGS (optional): list of cronjobs to be added to crond. use \n for newline. (mind the '').

Volumes

• /scripts Location for storing custom scripts which can be run via cronjobs.
• /etc/cron.d Add multiple cron files.

Docker compose

version: "3"

services:
  crond:
    container_name: crond
    image: maschel/crond
    restart: unless-stopped
    environment:
      - 'ADD-PACKAGES="<additional packages>'
      - 'CRON-STRINGS='* * * * * root /scripts/my-script.sh'
    volumes:
      - /path/to/custom/scripts:/scripts
      - /path/to/custom/crontab:/etc/cron.d

License

MIT LICENSE - Copyright (c) 2018 Geoffrey Mastenbroek