Docker Networking: From Fundamentals to Compose

Course Description

This course provides an in-depth guide to configuring, managing, and optimizing networking for your containerized applications. You'll explore the fundamentals of Docker networking, from the various network drivers like bridge, host, and none, to the practical commands used to manage them. Through a series of hands-on labs, you will learn to connect containers, expose services to the outside world using port mapping, and build complex, multi-container application networks with Docker Compose. The course also covers critical aspects of monitoring, troubleshooting, and securing your Docker networks to ensure seamless, reliable, and safe communication between your services.

Who is this course for

This course is designed for individuals who have a solid understanding of Docker and want to master its networking capabilities. It is ideal for:

• DevOps Engineers: Who design and manage the infrastructure for containerized applications.

• System & Network Administrators: Who need to integrate Docker into existing network environments and ensure security.

• Experienced Software Developers: Who build and deploy multi-service applications and need to manage inter-container communication.

• Solutions Architects: Who design scalable and resilient systems using container technologies.

Course Objectives

Upon successful completion of this course, you will be able to:

• Explain Docker Networking Fundamentals: Describe the core concepts of Docker networking and differentiate between the various network drivers (bridge, host, overlay, etc.).

• Manage Bridge Networks: Configure the default bridge network and use port mapping to expose container services.

• Implement Different Network Modes: Utilize host networking for high-performance applications and understand the use case for the 'none' network driver.

• Orchestrate Networks with Compose: Define and manage custom networks for multi-container applications using Docker Compose.

• Troubleshoot and Secure Networks: Apply best practices for monitoring Docker network traffic, troubleshooting common issues, and securing container communications.

Prerequisites

To succeed in this course, you should have:

1. Strong Docker Proficiency: You must be comfortable managing Docker containers, images, and have experience with Docker Compose.

2. Basic Networking Knowledge: A fundamental understanding of networking concepts like IP addresses, ports, and DNS is required.

3. A Working Docker Environment: You need an installed and functioning version of Docker and Docker Compose on your system to perform the hands-on labs.

Course outline

Section 1: Docker Networking Concepts

1. Demo: Understanding Networking in Docker

2. Introduction to Docker Networking

3. Docker Network Drivers

4. Hands-on Lab: Basic Docker Networking Commands

5. DNS Resolution in Docker

Section 2: Default Bridge Networking in Docker

1. Hands-on Lab: Exploring the Default Docker Bridge Network

2. Hands-on Lab: Docker Container Network Port Mapping

3. Hands-on Lab: Connecting a Postgres Database to a Flask App

Section 3: Host Network in Docker

1. Introduction and Use Cases for the Host Network

2. Hands-on Lab: Using the Host Network with Prometheus on Docker

Section 4: None Networking in Docker

1. Understanding the 'None' Network Type

2. Hands-on Lab: Using the 'None' Network in Docker

Section 5: Networking in Docker Compose

1. Introduction to Networking in Docker Compose

2. Hands-on Lab: Composing a Python Flask Bootstrap Weather Utility App

3. Code Example: Configuring a Custom Network in docker-compose.yml

Section 6: Monitoring, troubleshooting and security in docker containers

1. Monitoring and Troubleshooting Docker Networks

2. Security Considerations in Docker Networking

Testimonials