Container networking in Nginx - Mini Project: Build & Apply

Container Networking with Nginx

📖 Scenario: You are setting up a simple web server using Nginx inside a Docker container. To make your web server accessible from your computer, you need to configure container networking properly.

🎯 Goal: Learn how to create a Docker container running Nginx and configure its networking so that you can access the web server from your host machine.

📋 What You'll Learn

Create a Docker container running Nginx

Map the container's port 80 to the host's port 8080

Verify that the Nginx welcome page is accessible via http://localhost:8080

💡 Why This Matters

🌍 Real World

Developers and system administrators often run web servers inside containers. Proper networking setup lets them access these servers from their computers or other services.

💼 Career

Understanding container networking is essential for deploying applications in Docker and Kubernetes environments, a key skill for DevOps roles.

1

Create a Docker container running Nginx

Write the Docker command to run an Nginx container named mynginx in detached mode using the official nginx image.

Nginx

# Your command here

Need a hint?

Use docker run with --name to name the container and -d to run it in the background.

2

Map container port 80 to host port 8080

Modify the Docker command to map the container's port 80 to the host's port 8080 so you can access Nginx from your browser at http://localhost:8080.

Nginx

docker run --name mynginx -d nginx
# Add port mapping to expose port 80 on container to port 8080 on host

Need a hint?

Use the -p option with hostPort:containerPort format.

3

Check running containers and their ports

Write the Docker command to list all running containers with their port mappings to verify that mynginx is running and port 8080 is mapped.

Nginx

docker run --name mynginx -d -p 8080:80 nginx
# Your command here to list running containers with ports

Need a hint?

Use docker ps to see running containers and their port mappings.

4

Access Nginx welcome page

Write a command to fetch the homepage from http://localhost:8080 using curl to confirm the Nginx server is accessible.

Nginx

docker run --name mynginx -d -p 8080:80 nginx
docker ps
# Your curl command here

Need a hint?

Use curl http://localhost:8080 to get the Nginx welcome page content.