How to deploy the application on EC2 instance

Prerequisites

• Create a Ubuntu EC2 instance on AWS.
• Update the security group to allow incoming traffic on port 80, 443, 22 and other ports as required.
• Connect to the instance using SSH.
• Update the instance.

sudo apt-get update -y

Python application setup

• Install python3 and pip3.

sudo apt install python3 python3-pip -y

Node.js application setup

• Install Node.js and npm.

sudo apt-get install nodejs npm -y

Docker and Docker Compose setup

• Install and configure Docker.

sudo apt install docker.io -y
sudo systemctl start docker
sudo systemctl enable docker
sudo usermod -aG docker ubuntu

• Install Docker Compose.

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

• Check the installation by running the following commands.

docker --version
docker-compose --version

Deploy the application

• Clone the repository you want to deploy.

git clone <repository-url>
cd <repository-name>

• If you are using Docker Compose, run the following command.

docker-compose up -d

• Start the new screen session. Replace <screen-name> with the name of the screen you want to create.

screen -S <screen-name>

• If you want to copy the environment file from the local machine to the EC2 instance, use the following command.

rsync -avz -e "ssh -i <key-file>" <local-path> ubuntu@<public-ip>:<remote-path>

• Run the following command to start the application.

  • Python application

    • Create a virtual environment and install the dependencies.

    python3 -m venv .venv
    source .venv/bin/activate
    pip install -r requirements.txt

    • Run application specific commands like environment variable setup, etc.

    • Start the application.

    python app.py

  • Node.js application

    • Install the dependencies.

    npm install

    • Run application specific commands like environment variable setup, etc.

    • Start the application.

    npm start

• Detach the screen session by pressing Ctrl + A followed by D.

• To reattach the screen session, run the following command.

screen -ls
screen -x <screen-id>

Setup Apache as a reverse proxy

• Create a A record in the DNS settings of the domain pointing to the public IP of the EC2 instance.

• Install Apache server.

sudo apt-get install apache2 -y

• Install certbot and python3-certbot-apache.

sudo apt install certbot python3-certbot-apache -y

• Configure Apache to use the SSL certificate.

sudo certbot --apache -d <domain-name>

• Update the Apache configuration file.

cd /etc/apache2/sites-available/
sudo nano 000-default-le-ssl.conf

• Add the following lines just before the ServerName directive. Replace <port> with the port on which the application is running.

ProxyPass / http://127.0.0.1:<port>
ProxyPassReverse / http://127.0.0.1:<port>

• Enable the configuration and restart Apache.

sudo a2enmod proxy
sudo a2enmod proxy_http
sudo systemctl restart apache2

• Access the application using the domain name.