Book Image

Learn Docker - Fundamentals of Docker 18.x

By : Dr. Gabriel N. Schenker
Book Image

Learn Docker - Fundamentals of Docker 18.x

By: Dr. Gabriel N. Schenker

Overview of this book

Docker containers have revolutionized the software supply chain in small and big enterprises. Never before has a new technology so rapidly penetrated the top 500 enterprises worldwide. Companies that embrace containers and containerize their traditional mission-critical applications have reported savings of at least 50% in total maintenance cost and a reduction of 90% (or more) of the time required to deploy new versions of those applications. Furthermore they are benefitting from increased security just by using containers as opposed to running applications outside containers. This book starts from scratch, introducing you to Docker fundamentals and setting up an environment to work with it. Then we delve into concepts such as Docker containers, Docker images, Docker Compose, and so on. We will also cover the concepts of deployment, orchestration, networking, and security. Furthermore, we explain Docker functionalities on public clouds such as AWS. By the end of this book, you will have hands-on experience working with Docker containers and orchestrators such as SwarmKit and Kubernetes.

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Table of Contents (21 chapters)
Title Page
Title Page
Packt Upsell
Packt Upsell
Contributors
Contributors
Preface
Preface
Free Chapter
1
What Are Containers and Why Should I Use Them?
What Are Containers and Why Should I Use Them?
Technical requirements
What are containers?
Why are containers important?
What's the benefit for me or for my company?
The Moby project
Docker products
The container ecosystem
Container architecture
Summary
Questions
Further reading
2
Setting up a Working Environment
Setting up a Working Environment
Technical requirements
The Linux command shell
PowerShell for Windows
Using a package manager
Choosing a code editor
Docker Toolbox
Docker for Mac and Docker for Windows
Minikube
Summary
Questions
Further reading
3
Working with Containers
Working with Containers
Technical requirements
Running the first container
Starting, stopping, and removing containers
Inspecting containers
Exec into a running container
Attaching to a running container
Retrieving container logs
Anatomy of containers
Summary
Questions
Further reading
4
Creating and Managing Container Images
Creating and Managing Container Images
What are images?
Creating images
Sharing or shipping images
Summary
Questions
Further reading
5
Data Volumes and System Management
Data Volumes and System Management
Technical requirements
Creating and mounting data volumes
Sharing data between containers
Using host volumes
Defining volumes in images
Obtaining Docker system information
Listing resource consumption
Pruning unused resources
Consuming Docker system events
Summary
Questions
Further reading
6
Distributed Application Architecture
Distributed Application Architecture
What is a distributed application architecture?
Patterns and best practices
Running in production
Summary
Questions
Further reading
7
Single-Host Networking
Single-Host Networking
Technical requirements
The container network model
Network firewalling
The bridge network
The host network
The null network
Running in an existing network namespace
Port management
Summary
Questions
Further reading
8
Docker Compose
Docker Compose
Technical requirements
Demystifying declarative versus imperative
Running a multi-service app
Scaling a service
Building and pushing an application
Summary
Questions
Further reading
9
Orchestrators
Orchestrators
What are orchestrators and why do we need them?
The tasks of an orchestrator
Overview of popular orchestrators
Summary
Questions
Further reading
10
Introduction to Docker Swarm
Introduction to Docker Swarm
Architecture
Swarm nodes
Stacks, services, and tasks
Multi-host networking
Creating a Docker Swarm
Deploying a first application
The swarm routing mesh
Summary
Questions
Further reading
11
Zero Downtime Deployments and Secrets
Zero Downtime Deployments and Secrets
Technical requirements
Zero downtime deployment
Secrets
Summary
Questions
Further reading
12
Introduction to Kubernetes
Introduction to Kubernetes
Technical requirements
Architecture
Kubernetes master nodes
Cluster nodes
Introduction to Minikube
Kubernetes support in Docker for Desktop
Pods
Kubernetes ReplicaSet
Kubernetes deployment
Kubernetes service
Context-based routing
Comparing SwarmKit with Kubernetes
Summary
Questions
Further reading
13
Deploying, Updating, and Securing an Application with Kubernetes
Deploying, Updating, and Securing an Application with Kubernetes
Technical requirements
Deploying a first application
Zero downtime deployments
Kubernetes secrets
Summary
Questions
Further reading
14
Running a Containerized App in the Cloud
Running a Containerized App in the Cloud
Technical requirements
Deploying our application into AWS ECS
Deploying and using Docker EE on AWS
A short peek into Azure’s container offerings
A short peek into Google’s container offerings
Summary
Questions
Further reading
Assessment
Assessment
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter 7
Chapter 8
Chapter 9
Chapter 10
Chapter 11
Chapter 12
Chapter 13
Chapter 14
Other Books You May Enjoy
Other Books You May Enjoy
Leave a review - let other readers know what you think
Index
Index

Contributors

About the author

Gabriel N. Schenker has more than 25 years of experience as an independent consultant, architect, leader, trainer, mentor, and developer. Currently, Gabriel works as Senior Curriculum Developer at Confluent after coming from a similar position at Docker. Gabriel has a Ph.D. in Physics, and he is a Docker Captain, a Certified Docker Associate, and an ASP Insider. When not working, Gabriel enjoys time with his wonderful wife Veronicah and his children.

 

 

About the reviewer

Peter McKee is a Software Architect and Senior Software Engineer at Docker, Inc. He leads the technical team that delivers the Docker Success Center. He's been leading and mentoring teams for more than 20 years. When not building things with software, he spends his time with his wife and seven kids in beautiful Austin, TX.

 

 

 

 

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