RolfKoenders / image-processing-service

Image processing micro service. [POC]

Image Processing Service

Proof Of Concept

Goal

A large image (in widht & height) is uploaded and will be processed so we have different sizes coming out.

Plan / Approach

1. The image which is uploaded to the nodejs API will be uploaded to a shared volume
2. When the image is uploaded a message will be pushed on the queue
3. The workers which will be written in Golang will pickup the message, take the image and resize/scale them so we have three different sizes. (small, medium, large)

Starting up

Before starting everything up with docker compose, make sure to launch the setup.sh script. This script will create the missing folder where the uploaded images will be stored and install all the dependencies for the nodejs api.

# In the project dir
$ ./setup.sh

Then we can bring everything up with docker compose

$ docker-compose up --build

This will build and spin up the following container

• RabbitMQ
• Nginx
• API
• Worker

RabbitMQ

RabbitMQ is the most widely deployed open source message broker. The management portal is listening on port 15672

Nginx

Proxy layer for the API and used to serve static files. Open a browser window and go to http://localhost:8080 to see the upload form.

API

Simple API layer written in node.js. This is the API where the submitted form will end up.

Worker

The worker which is going to process the images and takes care of resizing them.