A Complete Guide to Docker for Operations and Development: Test-Prep for the Docker Certified Associate (DCA) Exam

Length: 214 pages
Edition: 1
Language: English
Publisher: Apress
Publication Date: 2022-05-13
ISBN-10: 1484281160
ISBN-13: 9781484281161
Sales Rank: #0 (See Top 100 Books)

Harness the power of Docker by containerizing your code with all its libraries and file systems to consistently run anywhere. This book is your source for learning all about Docker operations and development. It’s divided into two units and focuses on the topics that the Docker Certified Associate exam covers.

Unit 1 covers the Docker fundamentals, such as Docker Enterprise for Operations, Docker Enterprise for Developers, Swarm, and an introduction to Kubernetes. You will learn how to install Docker Community Edition, Docker Enterprise Edition with Kubernetes and CLI. Also, you will learn the Docker cycle, container lifecycle, develop applications in any language, wrap, build, ship, and deploy them for production. Finally, you will learn how to create a Swarm cluster, deploy an app to it, and manage it with the best practices according to the current technologies.

Unit 2 provides quizzes to help you prepare for the certification test. The DCA exam format and the question style has changed since Mirantis acquired Docker. To accommodate this, the quizzes mirror these changes.

What You’ll Learn

Understand the difference between containerization and virtualization
Install Docker CE on various platforms and manage the resources
Write Dockerfile, Docker Compose YAML, and Kubernetes manifest YAML files
Compare microservices and monolithic applications
Containerize monolithic applications

Who This Book Is For

Software developers, Cloud Architects, and DevOps operation managers.

Table of Contents
About the Author
About the Technical Reviewer
Chapter 1: Introduction
    Who Should Read This Book?
    How This Book Is Organized
    Exam Topics
    What You Will Learn
    Summary
Chapter 2: Installation and Configuration
    How to Install the Docker CE for Various Operating Systems
    Difference Between Containerization and Virtualization
    How to Set Up a Local Registry
    Configuration of Logging Drivers
    The Usage of Namespaces and Cgroups
    How to Set Up a Swarm, Configure Managers, Add Nodes, and Scale Your System
        First, Build a Simple Swarm of One Manager and One Worker
        Second, Let Us Scale Up to Five Replicas
    Summary
Chapter 3: Image Creation, Management, and Registry
    Docker Flow
        Pulling an Image
        Crafting a Container
        Container Lifecycle
        Create Your First Image
            Using Commit
            Using Dockerfile
        Push Your Images
    Dockerfile Commands
        The FROM Instruction
        The MAINTAINER Instruction
        The COPY Instruction
        The ADD Instruction
        The ENV Instruction
        The USER Instruction
        The WORKDIR Instruction
        The VOLUME Instruction
        The EXPOSE Instruction
        The RUN Instruction
        The CMD Instruction
        The ENTRYPOINT Instruction
    The inspect Command
    Multistage Build
    Summary
Chapter 4: Networking
    Containers’ Isolated Networking
    User-Defined Bridge Network
    Exposing Container Ports
        Some Differences in Networking Between Windows and Linux
    Swarm Networking
        What Is the Best Number of Managers?
        Datacenter Topology
        Replicated vs. Global Services
        Port Publishing Modes
    Kubernetes Networking
    Summary
Chapter 5: Storage and Volumes
    Persistent Volumes
    Ephemeral Volumes
    Data-Only Volume
    Filesystem vs. Volume
    Storage in Kubernetes
    Summary
Chapter 6: Docker Enterprise Edition/Mirantis Kubernetes Engine Installation
    Installing the Docker EE on Windows Server 2016
        Testing the Installation
    Installing the UCP
        Step 1: Create the First Virtual Machine
        Step 2: Initialize a Swarm and Add Nodes
        Step 3: Install UCP Version 3.0.0
        Step 4: Mount Issue
        Step 5: Reinstall UCP Version 3.0.0
        Step 6: Upload the License
        Step 7: Install Kubernetes CLI
        Step 8: Install the kubectl Binary via curl
    Installing the DTR
        Verify Logging from CLI from Both Nodes
        Verify DTR Installation from UCP Web UI
    Summary
Chapter 7: Universal Control Plane (UCP)
    The Interface
    Different UCP Versions
    Switching Between Orchestrators
    Docker Content Trust
    Summary
Chapter 8: Docker Trusted Registry (DTR)
    Install the DTR from the UCP
    Enable/Disable Image Scanning
    Push an Image to the DTR Repository
    Immutable Images
    Image Pruning
    Summary
Chapter 9: Microservices
    Microservices vs. Monolithic
    Process of Containerizing an App
    Python Example
    Java Example
    .NET Example
        Extra Resources for .NET Tools
        Ebook
    Extra Examples
    Summary
Chapter 10: Orchestration
    From Development to Production
    How to Write a Swarm docker-compose YAML File?
    How to Write a Kubernetes Manifest YAML File?
    Summary
Chapter 11: Security
    Role-Based Access Control (RBAC)
        Create a Subject
        Create a Collection
        Create a Role
        Create a Grant
    Docker Content Trust (DCT)
    Transport Layer Security (TLS)
    Summary
Chapter 12: DCA Exam Requirements
    Examination Format
    Pass the Exam Sections
    Registration Link and Certification
    For Online Remotely Proctored Exams
    Question Types
        Multiple-Choice Questions
        Discrete Option Multiple-Choice (DOMC) Questions
    Extra Resources
Chapter 13: Orchestration Quiz
    Answer Key
Chapter 14: Image Creation, Management, and Registry Quiz
    Answer Key
Chapter 15: Installation and Configuration Quiz
    Answer Key
Chapter 16: Networking Quiz
    Answer Key
Chapter 17: Security Quiz
    Answer Key
Chapter 18: Storage and Volumes Quiz
    Answer Key
Index

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