Supercronic in docker

Overview

Docker image contains supercronic is a powerful, lightweight tool designed to manage your services and xh is a modern command-line HTTP client inspired by curl. It can be integrated seamlessly into your workflow to ensure that scheduled tasks are executed reliably.

Features

• HTTP Protocol Management: It uses the HTTP protocol to manage services, making it compatible with a wide range of web services and APIs.
• Lightweight and Efficient: Designed to be lightweight, it minimizes resource usage while ensuring efficient task execution.
• Seamless Integration: Integrates smoothly into existing workflows and can be easily configured to manage various tasks.

Requirements

• Docker installed on your system.

Installation

$ docker pull imega/supercronic

Usage

Configuration

Supercronic uses a configuration file to define the tasks and their schedules. Below is an example configuration file (crontab) for Supercronic:

# Example crontab file for Supercronic

# Run a GET request every hour
0 * * * * xh GET http://example.com/api/task

# Run a POST request every day at midnight
0 0 * * * xh POST http://example.com/api/task2 key1=value1 key2=value2

Running Supercronic

To start Supercronic with your configuration file, use the following command:

$ docker run --rm -d -v `pwd`/crontabs:/crontabs imega/supercronic -json /crontabs

Example Tasks

Validate config

To validate a wrong config in example.

$ echo "*/1 * * *ERROR xh http://host.docker.internal:8081" > crontabs
$ docker run --rm -t -v `pwd`/crontabs:/crontabs imega/supercronic -test /crontabs
$ echo $?

GET Request

To schedule a GET request to be sent every hour:

0 * * * * xh GET http://example.com/api/task

POST Request

To schedule a POST request to be sent every day at midnight:

0 0 * * * xh POST http://example.com/api/task2 key1=value1 key2=value2

Timezone

Set timezone via ENV.

$ docker run --rm -d -e TZ=Europe/Berlin \
    -v `pwd`/crontabs:/crontabs \
    imega/supercronic -json /crontabs

Set timezone via config.

$ echo "CRON_TZ=Europe/Berlin" > crontabs
$ echo "*/1 * * * * xh http://someservice:8081/task" >> crontabs
$ docker run --rm -d \
    -v `pwd`/crontabs:/crontabs \
    imega/supercronic -json /crontabs

Advanced Configuration

Supercronic supports advanced configurations, including environment variables and error handling. Refer to the Supercronic documentation for more detailed information.

xh supports a lot powerful configurations like formatting output and checking statuses. Refer the xh documentation for more detailed information.

Troubleshooting

Conclusion

Supercronic, combined with the xh HTTP client, provides a robust solution for managing and scheduling tasks via HTTP. By following this documentation, you should be able to set up and configure Supercronic to handle your service management needs efficiently. For further assistance, refer to the official Supercronic GitHub repository and the xh documentation.