2. Mapping an AWS EC2 Application to a Custom Domain over HTTP

1. Create Your Domain

To access your application using a custom domain instead of the Elastic IP, you’ll need to register a domain name.

• You can register a domain through AWS Route 53 or any other domain registrar (e.g., GoDaddy, Namecheap).
• After registering the domain, you'll configure the DNS settings to point to your EC2 instance’s Elastic IP.

2. Register DNS A Record (IPv4) for Your Domain/Subdomain

Once you have your domain, you need to configure the DNS settings to associate your domain with the EC2 instance.

• In your domain registrar's control panel (or Route 53 if using AWS), create an A record that points to your EC2 Elastic IP address.

For example:

If you're using subdomains, set the Name field to the appropriate subdomain (e.g., app.yourdomain.com).

3. Configure Nginx for HTTP Access

Now that your domain is linked to your EC2 instance, you’ll need to configure Nginx to serve your application over HTTP.

1. Install Nginx (if not installed yet):

sudo apt update
sudo apt install nginx

1. Configure Nginx for your application:
2. Create a configuration file in /etc/nginx/sites-available/your-domain:

sudo nano /etc/nginx/sites-available/your-domain

• Add the following configuration to proxy traffic to your Docker container:

server {
    listen 80;
    server_name yourdomain.com www.yourdomain.com;

    location / {
        proxy_pass http://localhost:<your-app-port>;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}

1. Enable the configuration by creating a symbolic link from the sites-available directory to sites-enabled:

sudo ln -s /etc/nginx/sites-available/your-domain /etc/nginx/sites-enabled/

1. Test the Nginx configuration to make sure there are no errors:

sudo nginx -t

1. Restart Nginx to apply the new configuration:

sudo systemctl restart nginx

At this point, Nginx should be serving your application via your domain over HTTP.

4. Access Your Application

Once Nginx is configured and running, visit your application in the browser using your custom domain:

http://yourdomain.com

OBSERVATION - If it still not working

• Check DNS and create a A Record
  • Record name: Fill with the domain name you want ex: www.covid.amaralapps.com
  • Select the record type as A - IPv4 address.
  • In the Value field, enter your server’s IP address, , ex: 41.198.251.100. . Select Simple routing and click Create records to save.
• Verifique o Firewall no Servidor:

sudo ufw status
sudo ufw enable # if is enable you can activate
sudo ufw allow 80
sudo ufw allow 8502

• Check the security group
  • TCP: check if you opened the port 80 (http) and 443 (https)
• Check again the file /etc/nginx/sites-available/your-domain
• restart nginx

Summary of Commands

• Install Nginx:

sudo apt update && sudo apt install nginx

• Create Nginx config:

sudo nano /etc/nginx/sites-available/your-domain

• Add proxy settings in the config file:

server {
    listen 80;
    server_name yourdomain.com www.yourdomain.com;
    location / {
        proxy_pass http://localhost:<your-app-port>;
    }
}

P.S. - Using streamlit the file is something like this

server {
    listen 80;
    server_name covid.amaralapps.com www.covid.amaralapps.com;

    location / {
        proxy_pass http://localhost:8502;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # Configurações adicionais para WebSocket
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
}

• Enable the config:

sudo ln -s /etc/nginx/sites-available/your-domain /etc/nginx/sites-enabled/

• Test Nginx:

sudo nginx -t

• Restart Nginx:

sudo systemctl restart nginx

• Access your app:

http://yourdomain.com