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Programming language: JavaScript
License: GNU General Public License v3.0 only
Tags: Automation    

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README

ZeroQueue

⏰ A low-code queue management system ⏰

Powered by BullMQ - the fastest, most reliable, Redis-based queue for Node.

Installation • Usage • Contribute • License

Installation

A containerised version of ZeroQueue can be easily setup using docker with the following environment variables:

Env Var Description
DATABASE_URL Connection string for a sequelize supported database.
REDIS_URL Connection string for a Redis database.
SESSION_SECRET A string of atleast 32 characters to encrypt user sessions.

A built image of ZeroQueue is currently hosted on Docker Hub. This will allow you to run the app in most environments and platforms such as docker-compose, Heroku, or Kubernetes.

Running using the Docker CLI

  1. First pull the image down from the registry.
docker pull zeroqueue/zeroqueue:latest
  1. You will then need to run migrations on your database. ZeroQueue uses sequelize ORM. This will assume you have a supported database already created with the connection string assinged to the envinronment variable DATABASE_URL.
docker run --rm -e DATABASE_URL zeroqueue/zeroqueue:latest npm run db:sync

If the database is running on localhost you will also need to set the --network="host" argument.

docker run --rm -e DATABASE_URL --network="host" zeroqueue/zeroqueue:latest npm run db:sync
  1. Once the above step finishes successfully, you can start ZeroQueue using the followng command. This will assume you have correctly assigned the environment variables for DATABASE_URL, REDIS_URL, and SESSION_SECRET. See the above table for details.
docker run --rm -d -e DATABASE_URL -e REDIS_URL -e SESSION_SECRET -p 9376:9376 --name zeroqueue zeroqueue/zeroqueue:latest

Note that the above command will map port 9376 to the ZeroQueue app. If running locally this will be available on http://localhost:9376.

If you are running the database and redis on localhost too, you will need to make sure the ZeroQueue container has access to the host network. On mac and windows this can be achieved by replacing localhost or 127.0.0.1 with host.docker.internal.

Environment specific examples

Feel free to open an issue if you would like to see instructions for setting up ZeroQueue in certain environments or platforms.

Usage

Each zeroqueue instance has many queues and each queue has many jobs with a different status.

Credentials

When you first login to ZeroQueue the credentials will be set to the following default values:

  • username: admin
  • password: password

It is recommended that you change this immediately via the settings, especially if running in production.

Queues

New queues can be spun up by providing a name and an optional schedule. Schedules are currently set using a crontab (you can use crontab.guru as a reference).

If no schedule is specified, then jobs will be processed as soon as they enter the queue.

Jobs

Jobs can be bulk added to the queue using a JSON file. The system expects the JSON file to be an array of objects with each object representing a single job.

Each job in the array has the following fields.

Field Description
name A string to identify the job. This will default to a random id if left blank.
data This is the data that will be made available to workers.
opts These are custom job options and will have the same interface as specified by the BullMQ docs.

The schema to validate a JSON file is:

{
  "type": "array",
  "items": {
    "$ref": "#/definitions/jobs"
  },
  "definitions": {
    "jobs": {
      "type": "object",
      "properties": {
        "name": {
          "type": "string"
        },
        "data": {
          "type": "object"
        },
        "opts": {
          "type": "object"
        }
      }
    }
  }
}

Workers

The worker is the only piece of code you'll need to worry about in this system.

Start by installing BullMQ:

npm install bull

To spin up a worker you can either follow the BullMQ quick start guide or use the following template:

const Queue = require('bull');

const queue = new Queue('YOUR QUEUE NAME', process.env.REDIS_URL);

queue.process('*', async (job) => {
  const { data } = job;

  // worker code here...
  job.log(JSON.stringify(data));

  // capture job progress...
  job.progress(100);

  // returns a promise...
  return data;
});

Contribute

Pull requests on this project are welcome, or feel free to open an issue if you would like to see a feature added or bug fixed. You can also support this project by donating.

Running from source in development mode

ZeroQueue is built using NextJS so this will assume you have node.js and npm installed locally. You will also need docker for any backing services.

  1. Install dependencies
npm install
  1. Setup backing services (i.e. postgreSQL and Redis)
npm run dev:services:up
npm run db:sync
  1. Start the dev server
npm run dev

When you are done you can stop the server and tear down the backing services using:

npm run dev:services:down

Running tests

TBA

Running Lint

ZeroQueue uses both ESLint and Prettier for code linting and formatting.

npm run lint

License

This project is licensed under the GNU GPLv3 License - see the LICENSE.md file for details.


*Note that all licence references and agreements mentioned in the ZeroQueue README section above are relevant to that project's source code only.