nodetab

nodetab provides cron job functionality for Node.js applications. This image runs cron jobs based on given schedule and task command. The latest version of nodetab has Node.js v14.

Usage

The image expects 2 environment variables : SCHEDULE and TASK. TASK defines the command which should be run periodically. SCHEDULE defines when the task must be run. SCHEDULE has exactly the same time format with crontab. It must contain 5 sections defining minute, hour, day of month, month, day of week. Star notation and / can be used as well as any valid crontab time format.

The application or script code must be mounted to /app. All the tasks are run under /app directory in the container.

Running with docker run

If you want to run any available bash command without any external script or code :

docker run -it --rm  -e SCHEDULE="* * * * *" -e TASK="node -v" uguraslan/nodetab

If you have an index.js file (or any JavaScript file) which should be run directly with node :

docker run -it --rm -v $PWD:/app -e SCHEDULE="* * * * *" -e TASK="node index.js" uguraslan/nodetab

If you have an app which can be run with npm commands :

docker run -it --rm -v $PWD:/app -e SCHEDULE="* * * * *" -e TASK="npm start" uguraslan/nodetab

Running with docker-compose.yml

You can use following sample docker compose file to run nodetab :

version: '3.7'

services:
  cron:
    image: uguraslan/nodetab:latest
    environment:
      SCHEDULE: "* * * * *"
      TASK: "node index.js"
    volumes:
      - .:/app

Extending as a new Dockerfile

If you want to create an docker image by adding your application/script code you can use following template. The default WORKDIR is /app directory.

FROM uguraslan/nodetab:latest

COPY . /app

Notes :

• The task command must be run and exit after it finishes its job.