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Docker Cookbook

By : Cochrane, Jeeva S. Chelladhurai, K Khare

3.5 (2)

Docker Cookbook

3.5 (2)

By: Cochrane, Jeeva S. Chelladhurai, K Khare

Overview of this book

Docker is an open source tool used for creating, deploying, and running applications using containers. With more than 100 self-contained tutorials, this book examines common pain points and best practices for developers building distributed applications with Docker. Each recipe in this book addresses a specific problem and offers a proven, best practice solution with insights into how it works, so that you can modify the code and configuration files to suit your needs. The Docker Cookbook begins by guiding you in setting up Docker in different environments and explains how to work with its containers and images. You’ll understand Docker orchestration, networking, security, and hosting platforms for effective collaboration and efficient deployment. The book also covers tips and tricks and new Docker features that support a range of other cloud offerings. By the end of this book, you’ll be able to package and deploy end-to-end distributed applications with Docker and be well-versed with best practice solutions for common development problems.

Preface

Preface

Who this book is for

What this book covers

To get the most out of this book

Sections

Get in touch

Free Chapter

Introduction and Installation

Introduction and Installation

Introduction

Verifying requirements for Docker installation

Installing Docker on Ubuntu

Installing Docker on CentOS

Installing Docker on Linux with an automated script

Installing Docker for Windows

Installing Docker for Mac

Pulling an image and running a container

Adding a nonroot user to administer Docker

Finding help with the Docker command line

Working with Docker Containers

Working with Docker Containers

Introduction

Listing/searching for an image

Pulling an image

Listing images

Starting a container

Listing containers

Looking at the container logs

Stopping a container

Removing a container

Removing all stopped containers

Setting the restart policy on a container

Getting privileged access inside a container

Accessing the host device inside a container

Injecting a new process into a running container

Reading a container's metadata

Labeling and filtering containers

Reaping a zombie inside a container

Working with Docker Images

Working with Docker Images

Introduction

Creating an image from the container

Creating an account with Docker Hub

Logging in and out of the Docker image registry

Publishing an image to the registry

Looking at the history of an image

Removing an image

Exporting an image

Importing an image

Building an image using a Dockerfile

Building an Apache image – a Dockerfile example

Setting up a private index/registry

Automated builds – with GitHub and Bitbucket

Creating a custom base image

Creating a minimal image using a scratch base image

Building images in multiple stages

Visualizing the image hierarchy

Network and Data Management for Containers

Network and Data Management for Containers

Introduction

Accessing containers from outside

Attaching containers to a host network

Launching containers with no network

Sharing IP addresses with other containers

Creating a user-defined bridge network

Discovering and load balancing containers

Persisting data using volumes

Sharing data between the host and the container

Docker Use Cases

Docker Use Cases

Introduction

Testing with Docker

Performing CI/CD with Shippable and Heroku

Performing CI/CD with TravisCI

Setting up PaaS with OpenShift origin

Building and deploying an app on OpenShift from the source code

Docker APIs and SDKs

Docker APIs and SDKs

Introduction

Working with images using APIs

Building images using APIs

Launching containers using APIs

Performing container operations using APIs

Exploring Docker remote API client libraries

Configuring the Docker daemon for remote connectivity

Securing the Docker daemon's remote connectivity

Docker Performance

Docker Performance

Introduction

Benchmarking CPU performance

Benchmarking disk performance

Benchmarking network performance

Getting container resource usage using the stats feature

Setting up performance monitoring

Docker Orchestration and Hosting a Platform

Docker Orchestration and Hosting a Platform

Introduction

Running applications with Docker Compose

Setting up a cluster with Docker Swarm

Using secrets with Docker Swarm

Setting up a Kubernetes cluster

Using secrets with Kubernetes

Scaling up and down in Kubernetes cluster

Setting up WordPress with Kubernetes clusters

Docker Security

Docker Security

Introduction

Setting Mandatory Access Control (MAC) with SELinux

Allowing writes to volumes mounted from the host with SELinux ON

Removing capabilities to break down the power of a root user inside a container

Sharing namespaces between the host and the container

Getting Help and Tips and Tricks

Getting Help and Tips and Tricks

Introduction

Starting Docker in debug mode

Building a Docker binary from the source

Building images without using cached layers

Building your own bridge for container communication

Changing the default OCI runtime

Selecting the logging driver for containers

Getting real-time Docker events for containers

Docker on the Cloud

Docker on the Cloud

Introduction

Docker for AWS

Deploying WordPress on Docker for AWS

Docker for Azure

Deploying Joomla! on Docker for Azure

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Installing Docker on Linux with an automated script

In the previous two recipes, we went through the different steps required to install Docker on Ubuntu and CentOS. Those steps are fine when you are only installing it on a host or two, but what if you need to install it on a hundred? In that case, you would want something a little more automated to speed up the process. This recipe shows you how to install Docker on different Linux flavors using an install script that is provided by Docker.

Getting ready

Like all scripts that you download off the internet, the first thing you should do is examine the script and make sure you know what it is doing before you use it. To do this, go through the following steps:

Visit https://get.docker.com in your favorite web browser to review the script, and make sure you are comfortable with what it is doing. If in doubt, don't use it.
The script needs to be run as root or with sudo privileges.
If Docker has already been installed on the host, it needs to be removed before running the script.

The script currently works with the following flavors of Linux: CentOS, Fedora, Debian, Ubuntu, and Raspbian.

How to do it

To use the script, go through the following steps:

Download the script to the host system:

        $ curl -fsSL get.docker.com -o get-docker.sh

Run the script:

        $ sudo sh get-docker.sh

How it works...

The preceding recipe used an automated script to install Docker on Linux.

There's more...

In order to upgrade Docker, you will need to use the package manager on your host. Rerunning the script can cause issues if it attempts to re-add repositories that were already added. See the previous recipes to learn how to upgrade Docker on CentOS and Ubuntu using their respective package managers.

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