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Movie Streaming Platform Microservices

Overview

This project sets up a simple microservices infrastructure for a movie streaming platform. It includes an API Gateway, an Inventory API, and a Billing API. The services communicate using HTTP and RabbitMQ and are encapsulated in different virtual machines using Vagrant.

Prerequisites

Before starting, ensure you have the following software installed:

  • Node.js
  • PostgreSQL
  • RabbitMQ
  • Postman
  • VirtualBox or VMWare
  • Vagrant

Environment Variables

Create a .env file in the root directory with the following variables:

DATABASE_URL_INVENTORY=postgresql://user
@inventory-vm/movies
DATABASE_URL_BILLING=postgresql://user
@billing-vm/orders
RABBITMQ_URL=amqp://localhost

Setup Instructions

Step 1: Clone the Repository

git clone https://github.com/yourusername/movie-streaming-platform.git
cd movie-streaming-platform

Step 2: Configure Virtual Machines

Create a Vagrantfile to set up the three VMs:

# Vagrantfile
Vagrant.configure("2") do |config|
  config.vm.define "gateway-vm" do |gateway|
    gateway.vm.box = "ubuntu/bionic64"
    gateway.vm.network "private_network", type: "dhcp"
    gateway.vm.provision "shell", path: "./scripts/setup-gateway.sh"
  end

  config.vm.define "inventory-vm" do |inventory|
    inventory.vm.box = "ubuntu/bionic64"
    inventory.vm.network "private_network", type: "dhcp"
    inventory.vm.provision "shell", path: "./scripts/setup-inventory.sh"
  end

  config.vm.define "billing-vm" do |billing|
    billing.vm.box = "ubuntu/bionic64"
    billing.vm.network "private_network", type: "dhcp"
    billing.vm.provision "shell", path: "./scripts/setup-billing.sh"
  end
end

Step 3: Provision Virtual Machines

vagrant up

Step 4: SSH into the Virtual Machines and Run Applications

vagrant ssh gateway-vm
# Inside gateway-vm
cd /vagrant/srcs/api-gateway
node server.js

vagrant ssh inventory-vm
# Inside inventory-vm
cd /vagrant/srcs/inventory-app
node server.js

vagrant ssh billing-vm
# Inside billing-vm
cd /vagrant/srcs/billing-app
node server.js

Step 5: Test the APIs

Use Postman to test the endpoints:

Inventory API Endpoints

  • GET /api/movies: Retrieve all movies.
  • GET /api/movies?title=[name]: Retrieve movies with name in the title.
  • POST /api/movies: Create a new movie entry.
  • DELETE /api/movies: Delete all movies.
  • GET /api/movies/:id: Retrieve a single movie by id.
  • PUT /api/movies/:id: Update a single movie by id.
  • DELETE /api/movies/:id: Delete a single movie by id.

Billing API Endpoint

  • POST /api/billing:
{
  "user_id": "3",
  "number_of_items": "5",
  "total_amount": "180"
}

Step 6: Monitor and Manage Applications with PM2

Inside each VM, use PM2 to manage the Node.js applications:

sudo pm2 start server.js
sudo pm2 list
sudo pm2 stop <app_name>
sudo pm2 restart <app_name>

Design Choices

  • Microservices Architecture: Allows for modular, scalable, and maintainable service deployment.
  • HTTP and RabbitMQ: Enables reliable communication between services with asynchronous message processing.
  • Vagrant for VM Management: Ensures consistent development environments.
  • Node.js with Express and Sequelize: Provides a robust framework for building and interacting with APIs.
  • PostgreSQL: A reliable relational database for data storage.
  • PM2: Manages Node.js processes ensuring high availability.

Ensure that the setup-gateway.sh, setup-inventory.sh, and setup-billing.sh scripts are correctly written to install the necessary software and set up the databases.