Networks

Part of the Introduction to Docker section of Coddy's Terminal journey. Lesson 31 of 40.

Docker uses networks to control how containers talk to each other and to the outside world. List the existing networks with docker network ls:

docker network ls

Every Docker setup starts with three built-in networks: bridge (the default), host, and none. You can create your own network for a group of containers to share:

docker network create mynet

The three built-in networks are protected: Docker will refuse to remove them, because the system depends on them.

Challenge

Beginner

Create a network named backend, then list all networks to confirm both your network and the built-in bridge network are present.

Try it yourself

Terminal

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Introduction to Docker

1Introduction

What Is Docker Images And Containers

4Managing Containers

Naming Containers Detached Containers Listing All Containers Stopping And Removing Recap - Container Lifecycle

7Files In Images

The COPY Instruction The WORKDIR Instruction Recap - Package It Up

10Greeting App Project

Project Overview Write The Dockerfile

Build And Run

Personalize The Greeting

Ship A Tagged Version

2Images

Pulling Images Listing Images Tagging Images Recap - Image Wrangler

5Inspecting Containers

Container Logs Inspecting Details Executing Commands Recap - Health Check

8Copying Files

Copy Into A Container Copy Out Of A Container

11Final Challenges

Distro Detective Full Build Pipeline Runtime File Drop

3Running Containers

Running A Command Real Execution Different Distros Auto-Remove Containers Recap - Container Runner

6Building Images

What Is A Dockerfile Building An Image The CMD Instruction Recap - Image Builder

9Volumes & Networks

VolumesNetworksRecap - Managing Resources

Practice on your own: Terminal playground