Name: Docker - Practical Guide for Developers and DevOps Teams
Brand: SAP
SKU: BOOK-SAPPRESS-EBOOK-2023-9781493223848

Docker - Practical Guide for Developers and DevOps Teams

Language

🇺🇸 English

Publisher SAP PRESS

Year / Edition 2023 / 1

Pages 491

Authors Bernd Öggl, Michael Kofler

Docker

Learn the ins and outs of containerization in Docker with this practical guide! Begin by installing and setting up the platform. Then master the basics: get to know important terminology, understand how to run containers, and set up port redirecting and communication. You’ll learn to create custom images, work with commands, and use key containerization tools. Gain essential skills by following exercises that cover common tasks from packaging new applications and modernizing existing applications to handling security and operations.

Get hands-on practice with Docker, from setup to orchestration
Work with Dockerfiles, the docker compose command, GitLab, and Docker Hub
Learn about project migration, security, Kubernetes, and more
Consult and download practical code examples

You'll learn about:

Basics:
Install Docker on Windows, macOS, or Linux. Then master the basic principles of working with the Docker platform: What are images? How do containers communicate with each other? Where do containers store data? You'll get to know Dockerfile syntax, learn to upload images, work with the docker compose command, and much more.
Tools:
Build containers with essential tools, including Alpine Linux; Apache and Ngnix web servers; MySQL/MariaDB, MongoDB, PostgreSQL, and Redis database servers; JavaScript, Java, and Python programming languages; and web applications such as WordPress and Joomla.
Hands-on Exercises:
Develop modern web applications and transform existing projects with Docker by following step-by-step exercises. Use GitLab, Swarm, and Kubernetes to take your Docker projects to the next level. Round out your knowledge of configuring basic security mechanisms and setting up CI/CD pipelines.

Key Highlights:

Installation and configuration
Dockerfiles
Docker commands
Rootless Docker
Project migration
GitLab
Grafana
Kubernetes
Container security
Continuous integration and delivery (CI/CD)
Docker images

View Full Table of Contents

Preface
- Docker
- About This Book
- Brave New Docker World
  - Book Resources
  - GitHub
  - Test Platforms and Linux Distributions
PART I Introduction
1 Hello World
- 1.1 Docker Quick Install
  - 1.1.1 Windows
  - 1.1.2 macOS
  - 1.1.3 Linux
- 1.2 Apache with PHP 8
  - 1.2.1 Dockerfile
- 1.3 Node.js
- 1.4 Python
2 Installation
- 2.1 Docker Variants
- 2.2 Version Numbers
- 2.3 Installation on Windows
- 2.4 Installation on macOS
- 2.5 Installation on Linux
  - 2.5.1 Installation on Ubuntu
  - 2.5.2 Installation on the Raspberry Pi Operating System
  - 2.5.3 Installation on Red Hat Enterprise Linux 8 and Fedora
  - 2.5.4 Other Installation Variants
  - 2.5.5 Troubleshooting and Logging
  - 2.5.6 Working without ""sudo""
- 2.6 Rootless Docker
  - 2.6.1 ""newuidmap"" and ""newgidmap""
  - 2.6.2 Using a System-Wide Rootless Docker Installation
  - 2.6.3 Installing Rootless Docker
  - 2.6.4 No ""ping""
  - 2.6.5 Local Docker Files
  - 2.6.6 Problems with the Virtual File System Directory
3 Basic Principles
- 3.1 Basic Principles and Terminology
  - 3.1.1 Images and Containers
  - 3.1.2 Volumes
  - 3.1.3 Services, Stacks, and Clusters
  - 3.1.4 docker Command versus Docker Daemon (dockerd)
  - 3.1.5 Linux versus Windows
  - 3.1.6 Virtual Machines versus Containers
- 3.2 Running Containers
  - 3.2.1 Status Information
  - 3.2.2 Tidying Up
- 3.3 Using Containers Interactively
  - 3.3.1 Network Connection
  - 3.3.2 Containers versus Images Again
  - 3.3.3 Running the Container Again via ""docker start""
  - 3.3.4 Custom Container Names
  - 3.3.5 Running Other Processes in Parallel via docker exec
  - 3.3.6 Tidying Up
- 3.4 Port Redirection
  - 3.4.1 Connecting Container Ports to Local Ports
  - 3.4.2 Problems with Port 80
  - 3.4.3 Tidying Up
- 3.5 Data Storage in Volumes
  - 3.5.1 Storing the Database in an Automatically Created Volume
  - 3.5.2 Analyzing Volumes
  - 3.5.3 Calling the MariaDB Client
  - 3.5.4 A Look Inside the Container
  - 3.5.5 Logging
  - 3.5.6 Tidying Up
- 3.6 Named Volumes
  - 3.6.1 Container Update without Data Loss
  - 3.6.2 Tidying Up
- 3.7 Volumes in Custom Directories
  - 3.7.1 Problems with Security-Enhanced Linux
  - 3.7.2 Problems on Windows Hosts
  - 3.7.3 Tidying Up
- 3.8 Communication between Containers
  - 3.8.1 Setting Up a Private Docker Network
  - 3.8.2 MariaDB
  - 3.8.3 phpMyAdmin
  - 3.8.4 WordPress
  - 3.8.5 Stopping and Restarting Containers
  - 3.8.6 Updates
  - 3.8.7 Tidying Up
- 3.9 Administration of Docker
  - 3.9.1 Determining Space Requirements of Images and Containers
  - 3.9.2 Deleting Containers and Images
  - 3.9.3 Managing Volumes
  - 3.9.4 General Overview
  - 3.9.5 Releasing Unused Space
4 Custom Docker Images (Dockerfiles)
- 4.1 Dockerfiles
  - 4.1.1 Dockerfile Syntax
  - 4.1.2 Introductory Example
  - 4.1.3 Specifying the Source Image (""FROM"")
  - 4.1.4 Adding Files (""ADD"" versus ""COPY"")
  - 4.1.5 Container ""start"" Command (""CMD"" and ""ENTRYPOINT"")
  - 4.1.6 Running Commands (RUN)
  - 4.1.7 Volume Directories (VOLUME)
  - 4.1.8 Creating and Testing an Image
  - 4.1.9 Tidying Up
- 4.2 A Custom Web Server Image
  - 4.2.1 Creating and Testing an Image
- 4.3 Uploading Images to Docker Hub
  - 4.3.1 Login
  - 4.3.2 ""push"" Command
  - 4.3.3 Image Description
  - 4.3.4 Image Tags
  - 4.3.5 Deleting Uploaded Images
- 4.4 Setting Up a Pandoc and LaTeX Environment as an Image
  - 4.4.1 Installation Work
  - 4.4.2 Working Directory and Volume
  - 4.4.3 Creating the Image
  - 4.4.4 Running the Container
  - 4.4.5 Troubleshooting
5 docker compose
- 5.1 docker-compose versus docker stack
- 5.2 Installing ""docker-compose""
- 5.3 YAML Ain't Markup Language Syntax
- 5.4 Hello Compose!
  - 5.4.1 ""docker compose""
  - 5.4.2 ""docker stack deploy""
  - 5.4.3 Debugging
  - 5.4.4 Interactive Use
- 5.5 The docker-compose.yml File
  - 5.5.1 Image or Dockerfile?
  - 5.5.2 Networks
  - 5.5.3 Network Ports
  - 5.5.4 Volumes
  - 5.5.5 Named Volumes
  - 5.5.6 Environment Variables
  - 5.5.7 Command Execution
  - 5.5.8 Restart Behavior
  - 5.5.9 Deploy Settings
- 5.6 Passwords and Other Secrets
  - 5.6.1 Sharing MariaDB/MySQL Passwords between Two Containers
  - 5.6.2 Secure Exchange of Secrets
6 Tips, Tricks, and Internal Details
- 6.1 Visual Studio Code
  - 6.1.1 Docker Extension
  - 6.1.2 Remote Containers
- 6.2 Portainer
  - 6.2.1 Tidying Up
- 6.3 Pull Limit in Docker Hub
  - 6.3.1 Lots of Activity in Docker Hub
  - 6.3.2 No Unlimited Access to Images
  - 6.3.3 Bypassing the Limit
  - 6.3.4 Using Alternative Registries
- 6.4 Using Different CPU Architectures
  - 6.4.1 Working on ARM Computers
  - 6.4.2 Running Containers of a Different Architecture
- 6.5 Starting Containers Automatically
  - 6.5.1 Restart Behavior with docker compose
  - 6.5.2 Automatically Starting Docker Containers on a Linux Server with systemd
  - 6.5.3 A Separate Service File
  - 6.5.4 Starting and Ending the Service
- 6.6 A Look Behind the Scenes
  - 6.6.1 docker, dockerd, and containerd
  - 6.6.2 The Overlay File System
  - 6.6.3 The /var/lib/docker Directory
  - 6.6.4 Process Management
  - 6.6.5 Resource Management through Control Groups
  - 6.6.6 Container Isolation through Namespaces
  - 6.6.7 Why the docker Command Usually Requires Root Privileges
  - 6.6.8 More ""sudo"" Convenience
  - 6.6.9 Network Management
  - 6.6.10 Windows (WSL2)
  - 6.6.11 Limiting RAM Utilization through Docker and WSL2
  - 6.6.12 macOS (Hypervisor and Virtualization Framework)
7 docker Command Reference
- 7.1 docker attach
- 7.2 docker build
- 7.3 docker commit
- 7.4 docker compose *
- 7.5 docker-compose config
- 7.6 docker-compose down
- 7.7 docker-compose events
- 7.8 docker-compose kill
- 7.9 docker-compose logs
- 7.10 docker-compose pause and docker compose unpause
- 7.11 docker-compose ps
- 7.12 docker-compose rm
- 7.13 docker-compose run
- 7.14 docker-compose start, docker-compose stop, and docker compose restart
- 7.15 docker-compose top
- 7.16 docker-compose up
- 7.17 docker container *
- 7.18 docker create
- 7.19 docker diff
- 7.20 docker events
- 7.21 docker exec
- 7.22 docker export
- 7.23 docker image *
- 7.24 docker images
- 7.25 docker import
- 7.26 docker info
- 7.27 docker inspect
- 7.28 docker kill
- 7.29 docker login and docker logout
- 7.30 docker logs
- 7.31 docker network *
- 7.32 docker node *
- 7.33 ""docker pause"" and ""docker unpause""
- 7.34 ""docker port""
- 7.35 docker ps
- 7.36 docker pull
- 7.37 docker push
- 7.38 docker rename
- 7.39 docker restart
- 7.40 docker rm and docker rmi
- 7.41 docker run
- 7.42 docker secret *
- 7.43 docker service *
- 7.44 docker stack *
- 7.45 docker start and docker stop
- 7.46 docker stats
- 7.47 docker swarm *
- 7.48 docker system *
- 7.49 docker tag
- 7.50 docker top
- 7.51 docker update
- 7.52 docker volume *
- 7.53 docker wait
PART II Toolbox
8 Alpine Linux
- 8.1 Characteristics
  - 8.1.1 Trying Out Alpine Linux
  - 8.1.2 Shell
  - 8.1.3 BusyBox
  - 8.1.4 Init System and Logging
  - 8.1.5 The ""musl"" Library
  - 8.1.6 Documentation
  - 8.1.7 Missing ""root"" Password
- 8.2 Package Management with ""apk""
  - 8.2.1 Package Sources
  - 8.2.2 Packages and Their Files
9 Web Servers and Company
- 9.1 Apache HTTP Server
  - 9.1.1 Using an Official Docker Image
  - 9.1.2 Using a Custom Dockerfile
  - 9.1.3 Using the Official Docker Image
- 9.2 Nginx
  - 9.2.1 Usage with a Custom Dockerfile
- 9.3 Nginx as Reverse Proxy with SSL Certificates from Let's Encrypt
  - 9.3.1 Nginx Reverse Proxy
  - 9.3.2 Creating the First Certificate
  - 9.3.3 Application Programming Interface Server
  - 9.3.4 Renewing Certificates
- 9.4 Node.js with Express
  - 9.4.1 Express Framework
  - 9.4.2 Docker Development Environment for Express
  - 9.4.3 Docker Production Environment for Express
  - 9.4.4 Debugging the Applications
- 9.5 HAProxy
  - 9.5.1 Hello World!
- 9.6 Traefik Proxy
  - 9.6.1 Installing and Configuring Traefik
  - 9.6.2 Connecting Docker Services with Traefik
10 Database Systems
- 10.1 MySQL and MariaDB
  - 10.1.1 Setting Up and Using MariaDB Containers Manually
  - 10.1.2 Setting Up a MariaDB Service with ""docker-compose""
  - 10.1.3 Setting Up the Database during Initialization
  - 10.1.4 Backups
  - 10.1.5 Using a Custom Configuration File (my.cnf)
- 10.2 PostgreSQL
  - 10.2.1 PostgreSQL and pgAdmin with ""docker compose""
  - 10.2.2 Backups with ""docker compose""
- 10.3 MongoDB
  - 10.3.1 Simple ""docker compose"" Setup with MongoDB
  - 10.3.2 Database Access
  - 10.3.3 MongoDB with Authentication
- 10.4 Redis
  - 10.4.1 Redis Replication with ""docker compose""
11 Programming Languages
- 11.1 JavaScript (Node.js)
  - 11.1.1 Trying Out Node.js
  - 11.1.2 ""printheadlines"": Packaging Node.js Script as a Docker Image
- 11.2 Java
  - 11.2.1 ""printheadlines"" Example
  - 11.2.2 Resource Management
- 11.3 PHP: Hypertext Preprocessor
  - 11.3.1 Official PHP Docker Images
  - 11.3.2 PHP as a Command-Line Program
  - 11.3.3 PHP with Web Servers (EXIF Example)
  - 11.3.4 Dockerfile for the EXIF Example
  - 11.3.5 docker-compose.yml for the EXIF Example
- 11.4 Ruby
  - 11.4.1 ""printheadlines"" Example
- 11.5 Python
  - 11.5.1 ""printheadlines"" Example
  - 11.5.2 Packaging an Existing Python Application as a Docker Image
  - 11.5.3 Sample Code
  - 11.5.4 Localization and Character Sets in Python Programs
12 Web Applications and Content Management Systems
- 12.1 WordPress
  - 12.1.1 Custom Docker Images
  - 12.1.2 The ""wp-cli"" Command
  - 12.1.3 Dealing with Passwords
  - 12.1.4 Update
  - 12.1.5 Backup
- 12.2 Nextcloud
  - 12.2.1 Installation via ""docker compose""
  - 12.2.2 Creating Backups
- 12.3 Joomla
PART III Exercises
13 A Modern Web Application
- 13.1 The Application
  - 13.1.1 Technical Background
- 13.2 The Frontend: Vue.js
  - 13.2.1 Vue.js Setup
  - 13.2.2 Development and Production Image (Multistage Builds)
  - 13.2.3 Implementation via docker-compose.override.yml
  - 13.2.4 Bundling JavaScript Code with Webpack
  - 13.2.5 Docker ""ENTRYPOINT"" Script for Node.js Modules
  - 13.2.6 Source Code
  - 13.2.7 The Main Vue.js Component
- 13.3 The API Server: Node.js Express
  - 13.3.1 Stateless or Stateful?
  - 13.3.2 Node.js Modules in the Development Environment
  - 13.3.3 Accessing the Application Programming Interface
  - 13.3.4 Source Code (server.js)
  - 13.3.5 Source Code (routes.js)
- 13.4 The Mongo Database
- 13.5 The Session Storage: Redis
14 Grafana
- 14.1 Grafana-Docker Setup
  - 14.1.1 Generating Data with Collectors (Telegraf)
  - 14.1.2 Storing Data with InfluxDB
  - 14.1.3 Visualizing Data with Grafana
- 14.2 Provisioning
- 14.3 A Customized Telegraf Image
  - 14.3.1 Dashboard Customizations
15 Modernizing a Traditional Application
- 15.1 The Existing Application
- 15.2 Planning and Preparation
  - 15.2.1 The Web Server
  - 15.2.2 WordPress
  - 15.2.3 WordPress Database Migration
  - 15.2.4 Automatic Updates in WordPress
  - 15.2.5 MariaDB
  - 15.2.6 Node.js Server
  - 15.2.7 The Map Application
  - 15.2.8 Cron Jobs
  - 15.2.9 Backups
- 15.3 The Development Environment
- 15.4 Production Environment and Migration
- 15.5 Updates
- 15.6 Tips for the Transition
- 15.7 Results
16 GitLab
- 16.1 GitLab Quick Start
- 16.2 GitLab Web Installation
- 16.3 HTTPS via a Reverse Proxy Setup
- 16.4 Email Dispatch
  - 16.4.1 Sending Emails with Your Own Exim Mail Server
  - 16.4.2 Integration into the GitLab Configuration
- 16.5 Secure Shell Access
- 16.6 Volumes and Backup
  - 16.6.1 Backing Up GitLab Application Files
  - 16.6.2 Restore
- 16.7 Custom Docker Registry for GitLab
- 16.8 The Complete docker-compose File
- 16.9 Using GitLab
  - 16.9.1 User
  - 16.9.2 Projects
  - 16.9.3 Wiki
  - 16.9.4 Tickets and Issues
- 16.10 GitLab Runner
  - 16.10.1 Installation
  - 16.10.2 The Shell Executor
  - 16.10.3 The Docker Executor
  - 16.10.4 The Kubernetes Executor
- 16.11 Mattermost
  - 16.11.1 Connecting to GitLab
17 Continuous Integration and Continuous Delivery
- 17.1 The dockerbuch.info Website with gohugo.io
  - 17.1.1 Running Hugo as a Docker Container
  - 17.1.2 Hugo Quick Start
- 17.2 Docker Images for the CI/CD Pipeline
  - 17.2.1 Web Server Docker Image
  - 17.2.2 Link Checker
  - 17.2.3 HTML Validator
- 17.3 The CI/CD Pipeline
  - 17.3.1 CI/CD with the GitLab Shell Runner
  - 17.3.2 Testing the Pipeline
  - 17.3.3 CI with the GitLab Docker Runner
  - 17.3.4 CI/CD with Kubernetes in the Google Cloud
18 Security
- 18.1 Software Installation
- 18.2 Origin of Docker Images
  - 18.2.1 External Registries
- 18.3 ""root"" in Docker Images
  - 18.3.1 Nginx Web Server without ""root"" Privileges
- 18.4 The Docker Daemon
  - 18.4.1 Rootless Docker
- 18.5 User Namespaces
  - 18.5.1 Functionality
- 18.6 Control Groups
- 18.7 Secure Computing Mode
- 18.8 AppArmor Security Profiles
  - 18.8.1 AppArmor Profile for Docker
  - 18.8.2 Custom AppArmor Rules
19 Swarm and Amazon Elastic Container Service
- 19.1 Swarm versus Kubernetes
- 19.2 Docker Swarm
  - 19.2.1 Swarm Quick Start
  - 19.2.2 ""Hello World"" in the Swarm
- 19.3 Docker Swarm in the Hetzner Cloud
  - 19.3.1 CLI Installation and Configuration with ""hcloud""
  - 19.3.2 Installing Docker with ""cloud-init""
  - 19.3.3 Creating Cloud Instances
  - 19.3.4 Launching the Diary App in Docker Swarm
  - 19.3.5 Secure Sockets Layer Certificates
  - 19.3.6 Simulating a Server Failure
  - 19.3.7 Security
- 19.4 Amazon Elastic Container Service
  - 19.4.1 Quick Start: Launching a Container in the AWS Cloud
  - 19.4.2 Amazon Elastic Container Service with ""docker compose""
20 Kubernetes
- 20.1 Minikube
  - 20.1.1 Autocompletion for ""kubectl""
  - 20.1.2 The First Deployment in Minikube
  - 20.1.3 Object Configuration in Files
  - 20.1.4 Kubernetes as a Cloud Platform
  - 20.1.5 Grafana Setup in Minikube
- 20.2 Amazon Elastic Kubernetes Service
  - 20.2.1 Creating Clusters with ""eksctl""
  - 20.2.2 Deleting Data Clusters
- 20.3 Microsoft Azure Kubernetes Service
  - 20.3.1 Creating Clusters
  - 20.3.2 Installing an Application
  - 20.3.3 Starting the Application
  - 20.3.4 First Test
  - 20.3.5 Tidying Up
- 20.4 Google Kubernetes Engine
  - 20.4.1 Creating a Project and Cluster
  - 20.4.2 The ""gcloud"" Command
  - 20.4.3 The Diary Application in the Google Kubernetes Engine
  - 20.4.4 Using Secure Sockets Layer Certificates from Let's Encrypt
Appendices
- A Podman as a Docker Alternative
  - A.1 Docker versus Podman from a Technical Perspective
  - A.2 Installing Podman
  - A.3 Container Registries
  - A.4 Hello World!
  - A.5 Storage Location for Containers and Images
  - A.6 Compatibility of the ""podman"" Command
  - A.7 No ""ping""
  - A.8 Volumes
  - A.9 ""podman secret""
  - A.10 Access to Container File Systems (""podman mount""/""umount"")
  - A.11 Managing Pods (""podman pod"")
  - A.12 Creating Images (""podman build"", ""buildah"")
  - A.13 Running ""docker-compose"" in Podman
  - A.14 ""podman-compose"" Instead of ""docker-compose""
- B The Authors
Index

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Docker

You'll learn about:

Key Highlights:

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Docker - Practical Guide for Developers and DevOps Teams

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