proxy_pass directive in Nginx - Mini Project: Build & Apply

Basic nginx Reverse Proxy Setup with proxy_pass

📖 Scenario: You are setting up a simple nginx server to forward requests to a backend web server running on your local machine. This is a common task when you want nginx to act as a reverse proxy, forwarding client requests to another server.

🎯 Goal: Build a minimal nginx configuration that uses the proxy_pass directive to forward all requests from nginx to a backend server at http://localhost:3000.

📋 What You'll Learn

Create a basic nginx server block listening on port 80

Use the proxy_pass directive inside a location / block

Set the proxy_pass URL exactly to http://localhost:3000

Print the final nginx configuration to verify

💡 Why This Matters

🌍 Real World

nginx is often used as a reverse proxy to forward client requests to backend servers, improving security and load balancing.

💼 Career

Understanding how to configure <code>proxy_pass</code> is essential for DevOps roles managing web servers and deploying scalable applications.

1

Create the basic nginx server block

Write the initial nginx configuration with a server block that listens on port 80 and has an empty location / block.

Nginx

server {
    listen 80;
    location / {
        # Your code here
    }
}

Need a hint?

Start by writing a server block with listen 80; and an empty location / block inside.

2

Add the proxy_pass directive

Inside the existing location / block, add the proxy_pass directive with the value http://localhost:3000.

Nginx

server {
    listen 80;
    location / {
        # Add proxy_pass directive here
    }
}

Need a hint?

Use the exact syntax proxy_pass http://localhost:3000; inside the location / block.

3

Add a simple proxy header configuration

Inside the location / block, add the line proxy_set_header Host $host; below the proxy_pass directive to forward the original host header.

Nginx

server {
    listen 80;
    location / {
        proxy_pass http://localhost:3000;
        # Add proxy_set_header here
    }
}

Need a hint?

This helps the backend server know the original host requested by the client.

4

Print the final nginx configuration

Print the entire nginx configuration stored in the variable nginx_config to verify the setup.

Nginx

nginx_config = '''
server {
    listen 80;
    location / {
        proxy_pass http://localhost:3000;
        proxy_set_header Host $host;
    }
}
'''
# Print the nginx configuration below
# Your code here

Need a hint?

Use print(nginx_config) to display the full configuration.