Docker Certified Associate (DCA) · Exam Guide by Urea, Francisco Javier Ramírez -- Read -- Imperial Library of Trantor

Index

Title Page Copyright and Credits

Docker Certified Associate (DCA): Exam Guide

Dedication About Packt

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Contributors

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Preface

Who this book is for What this book covers To get the most out of this book Download the example code files Code in Action Download the color images Conventions used Get in touch Reviews

Section 1 - Key Container Concepts Modern Infrastructures and Applications with Docker

Technical requirements Understanding the evolution of applications Infrastructures Processes Microservices and processes What are containers? Learning about the main concepts of containers Container runtime Images Containers Process isolation Orchestration Registry Docker components Docker daemon Docker client Docker objects Building, shipping, and running workflows Building Shipping Running Windows containers Customizing Docker Customizing the Docker daemon Docker client customization Docker security Docker client-server security Docker daemon security Namespaces User namespace Kernel capabilities (seccomp) Linux security modules Docker Content Trust Chapter labs Installing the Docker runtime and executing a "hello world" container Docker runtime processes and namespace isolation Docker capabilities Summary Questions Further reading

Building Docker Images

Technical requirements Building Docker images Creating images with Dockerfiles Creating images interactively Creating images from scratch Understanding copy-on-write filesystems Building images with a Dockerfile reference Dockerfile quick reference Building process actions Image tagging and meta-information Docker registries and repositories Securing images Managing images and other related objects Listing images Sharing images using registries Multistage building and image caches Templating images Image releases and updates Chapter labs Docker build caching Where to use volumes in Dockerfiles Multistage building Deploying a local registry Image templating using Dockerfiles Summary Questions Further reading

Running Docker Containers

Technical requirements Reviewing the Docker command line in depth Learning about Docker objects Running containers Main container actions Container network properties Container behavior definition Executing containers Container security options Using host namespaces Interacting with containers Limiting host resources Converting containers into images Formatting and filtering information Managing devices Chapter labs Reviewing Docker command-line object options Executing containers Limiting container resources Formatting and filtering container list output Summary Questions Further reading

Container Persistency and Networking

Technical requirements Understanding stateless and stateful containers Learning how volumes work Learning about volume object actions Using volumes in containers Learning about different persistence strategies Local persistence Distributed or remote volumes Networking in containers Using the default bridge network Understanding null networks Understanding the host network Creating custom bridge networks The MacVLAN network – macvlan Learning about container interactions Communication with the external world Inter-container communications DNS on custom bridge networks Publishing applications Chapter labs Using volumes to code on your laptop Mounting SSHFS Multi-homed containers Publishing applications Summary Questions Further reading

Deploying Multi-Container Applications

Technical requirements Installing and using Docker Compose Installing docker-compose as a Python module Installing docker-compose using downloaded binaries Executing docker-compose using a container Installing docker-compose on Windows servers Understanding the docker-compose.yaml file Using the Docker Compose command-line interface Customizing images with docker-compose Automating your desktop and CI/CD with Docker Compose Chapter labs Colors application lab Executing a red application Scaling the red application's backends Adding more colors Adding a simple load balancer Summary Questions Further reading

Introduction to Docker Content Trust

Technical requirements The Update Framework Signing images Reviewing signatures Creating and running applications in trusted environments Chapter labs Signing images for Docker Hub Summary Questions Further reading

Section 2 - Container Orchestration Introduction to Orchestration

Introducing orchestration concepts Learning about container orchestration Scheduling applications cluster-wide Managing data and persistency Scaling and updating application components Summary Questions Further reading

Orchestration Using Docker Swarm

Technical requirements Deploying Docker Swarm Docker Swarm overall architecture Management plane Control plane Data plane Deploying a Docker Swarm cluster using the command line Deploying Docker Swarm with high availability Creating a Docker Swarm cluster Recovering a faulty Docker Swarm cluster Backing up your Swarm Recovering your Swarm Scheduling workloads in the cluster – tasks and services Deploying applications using Stacks and other Docker Swarm resources Secrets Config Stacks Networking in Docker Swarm Service discovery and load balancing Bypassing the router mesh Using host mode Using Round-Robin DNS mode Chapter labs Creating a Docker Swarm cluster Deploying a simple replicated service Deploying a global service Updating a service's base image Deploying using Docker Stacks Swarm ingress internal load balancing Service discovery Summary Questions Further reading

Orchestration Using Kubernetes

Technical requirements Deploying Kubernetes using Docker Engine Deploying a Kubernetes cluster with high availability Pods, services, and other Kubernetes resources Pods Services ConfigMaps and secrets Namespaces Persistent volumes Deploying orchestrated resources Kubernetes networking Service discovery Load balancing Network policies Publishing applications Kubernetes security components and features Comparing Docker Swarm and Kubernetes side by side Chapter labs Deploying applications in Kubernetes Using volumes Summary Questions Further reading

Section 3 - Docker Enterprise Introduction to the Docker Enterprise Platform

Reviewing the Docker editions Docker Community Docker Enterprise Understanding CaaS The Docker Enterprise platform Docker Engine Universal Control Plane Docker Trusted Registry Planning your Docker Enterprise deployment Summary Questions Further reading

Universal Control Plane

Technical requirements Understanding UCP components and features UCP components on manager nodes UCP components on worker nodes Deploying UCP with high availability Reviewing the Docker UCP environment The web UI The command line using the UCP bundle Role-based access control and isolation UCP's Kubernetes integration UCP administration and security Backup strategies Docker Swarm's backup Backing up UCP Upgrades, monitoring, and troubleshooting Upgrading your environment Monitoring a cluster's health Troubleshooting UCP Troubleshooting UCP-KV Troubleshooting UCP-Auth Troubleshooting nodes Summary Questions Further reading

Publishing Applications in Docker Enterprise

Technical requirements Understanding publishing concepts and components Understanding an application's logic Publishing applications in Kubernetes using ingress controllers Using Interlock to publish applications deployed in Docker Swarm Reviewing Interlock usage Simple application redirection Publishing a service securely using Interlock with TLS Summary Questions Further reading

Implementing an Enterprise-Grade Registry with DTR

Technical requirements Understanding DTR components and features Deploying DTR with high availability Learning about RBAC Image scanning and security features Security scanning Image immutability Content trust in DTR Integrating and automating image workflow Image promotion DTR webhooks Mirror images between registries Registry caching Garbage collection Backup strategies Updates, health checks, and troubleshooting Logging DTR disaster recovery Some replicas are unhealthy, but we keep the cluster's quorum's state The majority of replicas are unhealthy All replicas are unhealthy Summary Questions Further reading

Section 4 - Preparing for the Docker Certified Associate Exam Summarizing Important Concepts

Reviewing orchestration concepts Required knowledge for the exam A brief summary of Docker image concepts Required image management knowledge for the exam A summary of the Docker architecture, installation, and configuration topics The knowledge required about the Docker platform for the exam A summary of the networking topics The Docker networking knowledge required for the exam Understanding security concepts and related Docker features The knowledge of Docker security required for the exam Quickly summarizing Docker storage and volumes The storage and volume knowledge required for the exam Summary

Mock Exam Questions and Final Notes

Docker Certified Associate exam details Mock exam questions Summary

Assessments

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 Exam answers

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