Bridge network default behavior in Docker - Mini Project: Build & Apply

Bridge Network Default Behavior in Docker

📖 Scenario: You are learning how Docker manages container networking using the default bridge network. This project will help you understand how to list Docker networks, inspect the default bridge network, and see its basic properties.

🎯 Goal: Build a simple Docker command sequence to explore the default bridge network's behavior and properties.

📋 What You'll Learn

Use the docker network ls command to list all Docker networks.

Use the docker network inspect bridge command to see details of the default bridge network.

Extract and display the Subnet and Gateway information from the default bridge network.

💡 Why This Matters

🌍 Real World

Docker's default bridge network is used to connect containers on the same host. Understanding it helps in managing container communication and network isolation.

💼 Career

Knowing Docker networking basics is essential for DevOps roles, as it helps in deploying and troubleshooting containerized applications.

1

List Docker Networks

Run the command docker network ls to list all Docker networks on your system.

Docker

# Run the command to list Docker networks
# Your code here

Need a hint?

Use the docker network ls command exactly to see all networks.

2

Inspect the Default Bridge Network

Run the command docker network inspect bridge to see detailed information about the default bridge network.

Docker

docker network ls
# Run the command to inspect the default bridge network
# Your code here

Need a hint?

The default bridge network is named bridge. Use docker network inspect bridge to see its details.

3

Extract Subnet and Gateway Information

Use the command docker network inspect bridge --format '{{range .IPAM.Config}}{{.Subnet}} {{.Gateway}}{{end}}' to display the Subnet and Gateway of the default bridge network.

Docker

docker network ls
docker network inspect bridge
# Run the command to extract Subnet and Gateway
# Your code here

Need a hint?

Use the --format option with docker network inspect to show only Subnet and Gateway.

4

Display the Subnet and Gateway Output

Run the full command sequence and display the output of the Subnet and Gateway information for the default bridge network.

Docker

docker network ls
docker network inspect bridge
docker network inspect bridge --format '{{range .IPAM.Config}}{{.Subnet}} {{.Gateway}}{{end}}'
# Display the output below
# Your code here

Need a hint?

The output should show the subnet and gateway like 172.17.0.0/16 172.17.0.1.