Book Image

Docker Cookbook - Second Edition

By : Ken Cochrane, Jeeva S. Chelladhurai, Neependra K Khare
2 (1)
Book Image

Docker Cookbook - Second Edition

2 (1)
By: Ken Cochrane, Jeeva S. Chelladhurai, Neependra 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.

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Table of Contents (13 chapters)
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
1
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
2
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
3
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
4
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
5
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
6
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
7
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
8
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
9
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
10
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
11
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
12
Other Books You May Enjoy
Other Books You May Enjoy
Leave a review - let other readers know what you think

Installing Docker for Mac

Docker for Mac is the fastest and most reliable way to run Docker on a Mac. It installs all of the tools required to set up a complete Docker development environment on your Mac. It includes the Docker command line, Docker Compose, and Docker Notary. It also works well with VPNs and proxies to make it easier when used in a corporate environment.

Recent releases have also added Kubernetes support so that you can easily create a full Kubernetes environment on your machine with just the click of a button.

Getting ready

Docker for Mac has the following system requirements:

  • macOS El Capitan 10.11, or a newer macOS release
  • At least 4 GB of RAM
  • The Mac hardware must be a 2010 or newer model, with Intel's hardware support for Memory Management Unit (MMU) virtualization, including Extended Page Tables (EPT) and unrestricted mode. To see whether your machine supports this, run the following command in a terminal:
        $ sysctl kern.hv_support
        kern.hv_support: 1
If your system does not satisfy these requirements, fear not—all is not lost. You can install Docker Toolbox (https://docs.docker.com/toolbox/overview/), which uses Oracle VirtualBox instead of HyperKit. It isn't as good, but it is better than nothing.

How to do it

To install Docker for Mac, go through the following steps:

  1. Download Docker for Mac from the Docker Store at https://store.docker.com/editions/community/docker-ce-desktop-mac. You will need to log in in order to download the installer. If you do not have a Docker account, you can create one at https://store.docker.com/signup.
  2. Open the installation file that you downloaded from the store. It should be called something like Docker.dmg.
  1. Drag and drop the whale icon into the Applications folder:

  1. Double-click the Docker.app icon in the Applications folder to start Docker, as shown in the following screenshot:
  1. You will be prompted to authorize Docker.app with your system password. This is normal—Docker.app needs privileged access to install some of its components. Click OK and enter your password so it can finish installing:
  1. When Docker is finished, a little whale icon will show up in the status menu in the top right of your screen, as shown in the following screenshot:
  1. If you click on the whale, you can access the application preferences and other options.
  2. Select the About Docker button to verify that you have the latest version.
  3. Check to make sure that it is installed and working. Open up a terminal window and type the following:
            $ docker container run hello-world

How it works...

The preceding recipe will download and install a Docker development environment on your Mac.

There's more...

Now that you have Docker for Mac installed, here are a few more tips for getting started:

  • Docker for Mac will automatically check for new updates and let you know when a new version is available for you to install. If you agree to upgrade, it will do all the work, downloading the new version and installing it for you.
  • Kubernetes isn't running by default. If you want to turn it on, you will need to click on the Docker whale icon in your Status menu, then select Preferences. Inside of Preferences, there is a Kubernetes tab. Click on the tab, then click the Enable Kubernetes option, and hit the Apply button:

See also

Previous Section
End of Section 8
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