Microservices Containerization Task

This document provides a step-by-step guide for containerizing four Node.js microservices and orchestrating them using Docker and Docker Compose. Additionally, it covers deploying the application on an AWS EC2 instance.

Objective

Containerize the Node.js microservices: User Service, Product Service, Order Service, and Gateway Service.

• Set up Docker Compose to run the services together.

• Deploy the containerized services on an EC2 instance.

• Test and document the setup process.

Prerequisites

• Node.js installed locally.

• Docker and Docker Compose installed.

Step 1: Creating Dockerfiles

1.1 User Service Dockerfile

Use the Node.js base image

FROM node:alpine

Set the working directory

WORKDIR /app

Copy package.json and install dependencies

COPY package.json . RUN npm install

Copy the rest of the application code

COPY . .

Expose the service port

EXPOSE 3000

Command to run the service

CMD ["npm", "start"]

1.2 Product Service Dockerfile

Use the Node.js base image

FROM node:alpine

Set the working directory

WORKDIR /app

Copy package.json and install dependencies

COPY package.json . RUN npm install

Copy the rest of the application code

COPY . .

Expose the service port

EXPOSE 3001

Command to run the service

CMD ["npm", "start"]

1.3 Order Service Dockerfile

Use the Node.js base image

FROM node:alpine

Set the working directory

WORKDIR /app

Copy package.json and install dependencies

COPY package.json . RUN npm install

Copy the rest of the application code

COPY . .

Expose the service port

EXPOSE 3002

Command to run the service

CMD ["npm", "start"]

1.4 Gateway Service Dockerfile

Use the Node.js base image

FROM node:alpine

Set the working directory

WORKDIR /app

Copy package.json and install dependencies

COPY package.json . RUN npm install

Copy the rest of the application code

COPY . .

Expose the service port

EXPOSE 3003

Command to run the service

CMD ["npm", "start"]

Step 2: Creating Docker Compose Configuration

• docker-compose.yml file to define the services and their configurations.

version: '3' services: user-service: build: ./user-service ports: - "3000:3000" networks: - app-network

product-service: build: ./product-service ports: - "3001:3001" networks: - app-network

order-service: build: ./order-service ports: - "3002:3002" networks: - app-network

gateway-service: build: ./gateway-service ports: - "3003:3003" networks: - app-network

networks: app-network: driver: bridge

Step 3: Deploying on EC2 Instance

• Launch an EC2 Instance

install Docker and Docker Compose on EC2

Update package list

sudo apt update

Install Docker

sudo apt install -y docker.io

Install Docker Compose

sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose sudo chmod +x /usr/local/bin/docker-compose

Add current user to the Docker group

sudo usermod -aG docker $USER

Transfer Files to EC2

scp -r ./microservices-containerization ec2-user@<EC2_IP>:/home/ec2-user/

Running the Application

SSH into the EC2 instance.

Run the following command to start the services:

sudo docker-compose up --build

3.5 Verify the Services

Access each service using the EC2 public IP and the respective ports:

User Service: http://<EC2_IP>:3000

Product Service: http://<EC2_IP>:3001

Order Service: http://<EC2_IP>:3002

Gateway Service: http://<EC2_IP>:3003