version: '3'

​

services:

  cron:

    image: alpine:3.11

    command: crond -f -l 8

    volumes:

      - ./cron_tasks_folder/15min:/etc/periodic/15min/:ro

      - ./cron_tasks_folder/hourly:/etc/periodic/hourly/:ro

/ # crontab -l

# do daily/weekly/monthly maintenance

# min   hour    day month   weekday command

*/15    *   *   *   *   run-parts /etc/periodic/15min

0   *   *   *   *   run-parts /etc/periodic/hourly

0   2   *   *   *   run-parts /etc/periodic/daily

0   3   *   *   6   run-parts /etc/periodic/weekly

0   5   1   *   *   run-parts /etc/periodic/monthly

​

# Adding more time periods

#!/bin/sh

echo "Starting startup.sh.."

echo "*       *       *       *       *       run-parts /etc/periodic/1min" >> /etc/crontabs/root

crontab -l

​

$ tree cron_tasks_folder

cron_tasks_folder

├── 15min

│   └── script_foo

└── hourly

    └── script_bar

version: '3'

services:

  cron:

    image: alpine:3.11

    command: crond -f -l 8

    volumes:

      - ./cron_tasks_folder/15min:/etc/periodic/15min/:ro

      - ./cron_tasks_folder/hourly:/etc/periodic/hourly/:ro

​

​

version: '3'

services:

  cron:

    image: alpine:3.11

    command: /usr/local/startup.sh && crond -f -l 8

    volumes:

      - ./cron_tasks_folder/15min:/etc/periodic/15min/:ro

      - ./cron_tasks_folder/hourly:/etc/periodic/hourly/:ro

      - ./cron_tasks_folder/1min:/etc/periodic/1min/:ro

      - ./scripts/startup.sh:/usr/local/startup.sh:ro

$ docker-compose run -d --force-recreate