humpedli/docker-cron repository overview

⁠Cron with docker

With this container you can use cron service inside docker.

Installed executables:

• bash
• find
• wget
• curl

⁠Cronfile example

Create a cronfile like this somewhere and define this file as a volume in docker command.

0 0 * * 1,4 /usr/bin/wget --http-user=test --http-password=test -q -O /dev/null "http://example.com/script.php"
0 2 * * * /usr/bin/find /volume/path* -mtime +30 delete

This example runs the http://example.com/script.php script every Monday and Thrursday at midnight (using basic http authentication) and clears files every day at 2 AM in the /volume/path directory which are older than 30 days.

Mount volumes like /volume/path from host system if it's needed.

⁠Usage

Docker command:

docker run --name=cron \
  --restart=always \
  -v <path_to_cronfile>:/cronfile \
  -v /etc/localtime:/etc/localtime:ro \
  -d humpedli/docker-cron

Docker compose:

version: '3'
services:
  cron:
    container_name: "cron"
    image: "humpedli/docker-cron"
    volumes:
      - "<path_to_cronfile>:/cronfile"
      - "/etc/localtime:/etc/localtime:ro"
    restart: "always"