Unicorn 🦄

What is it?

A container based on offical mongo image with a purpose of making a data seeding simple and a part of your docker-compose setup. The emphasis is on the local environments, but I suppose that doesn't have to be a limit, but in production it is your responsibility!

How it works?

Repo contains an example, but the snippet below sums it up:

unicorn:
    image: unicorn:latest
    container_name: unicorn.ctn
    environment:
      - MONGO_ADDRESS=mongo:27017
      - RECREATE_COLLECTIONS=true
    depends_on:
      - mongo
    volumes:
      - type: bind
        source: ./data
        target: /imports
        read_only: true
    healthcheck:
      test: echo 'db.stats().ok' | mongo mongo --quiet
      interval: 14s
      timeout: 3s
      retries: 3
      start_period: 1s

Note: 🦄 container is dependent on mongo container and code for it was omitted for brevity sake.

So where I should put my import data?

You should put your json files in a folder on your local machine structured like:
root/database_name/collection_name.json

Where:

• root - means a root folder that you are going to bind to 🦄 container
• database_name - folder that represents a future or existing mongo database
• collection_name.json - JSON file that represents a future or existing mongo collection

Environment variables

Currently there are only 2 of them:

• MONGO_ADDRESS - address of your mongo instance
• RECREATE_COLLECTIONS - if set to true 🦄 will re-create the specified collection, otherwise it will just import the data.

Final thoughts

This is a project I created because I found it useful in my day-2-day dev life, but also a way to play around with shell scripts. Having said that I am no expert when ti comes to writing shell scripts, and I am pretty sure that this one can be optimized or written more nicely, so I will appreciate all the comments.

Credits

Thanks to whom ever made the beautiful ASCII art!!!

TODO

Things that I would like to add in the future:

• Support for credentials
• Support for upsert