Table Of ContentHands on Docker
Dedicated to the people I love and the God I trust.
— Navin Sabharwal
Dedicated to people who made my life worth living and carved me into an
individual I am today and to God who shades every step of my life.
— Bibin W
Contents at a Glance
1: Linux Container
2: Docker
3: Docker Installation
4: Working With Images and Container
5: Docker Container Linking and Data Management
6: Building images and containers from scratch using Dockerfile
7: Testing and building container’s using Jenkins
8: Docker Provisioning using Chef and Vagrant
9: Deployment, Service Discovery and Orchestration tools for Docker
10: Networking, Security and Docker API’s
11: Cloud Based Container Services
Contents
Linux Containers
Namespaces:
Cgroups
Copy on write file system:
Docker
Introduction
Why to use Docker
Docker Architecture:
Docker internal components:
Working of Docker:
Underlying Technology:
Immutable infrastructure with Docker
Installation
Supported platforms:
Installing Docker on windows:
Installing Docker on Ubuntu:
Launching Docker containers:
Creating a daemonized container:
Connecting remote docker host using docker client
Docker server access over https
Working with containers
Docker Images
Container linking
Linking containers together:
Data management in containers
Docker data volumes:
Building and testing containers from scratch
Dockerfile
Dockerfile Best Practices
A static website using Apache
Creating MySQL image and containers
Creating a WordPress container
Running multiple websites on a single host using Docker:
Building and testing containers using Jenkins
Docker Provisioners
Docker vagrant provisioner
Managing Docker using chef
Docker Deployment Tools
Fig
Shipyard
Panamax
Docker Service Discovery and Orchestration
Service discovery with consul
Consul Architecture
Docker cluster management using Mesos
Mesosphere
Docker cluster management using Kubernetes
Kubernetes components
Minion server
Work Units
Installation
Docker orchestration using CoreOS and fleet
CoreOS Architecture
Networking, security and API’s
Docker networking
Docker security
Docker Remote API: (version v1.15)
Cloud container services
Google container engine
Amazon container service (ECS)
About the Authors
Navin Sabharwal is an innovator, thought leader, author, and consultant in the areas of
virtualization, cloud computing, big data and analytics.
Navin has created niche award-winning products and solutions and has filed numerous
patents in diverse fields such as IT services, virtual machine placement, cloud capacity
analysis, assessment engines, ranking algorithms, capacity planning engines, and
knowledge management.
Navin holds a Masters in Information Technology and is a Certified Project Management
Professional.
Navin has authored the following books: Cloud Computing First Steps (Publisher:
CreateSpace, ISBN#: 978-1478130086), Apache Cloudstack Cloud Computing (Publisher:
Packt Publishing, ISBN#: 978-1782160106), Cloud Capacity Management (Publisher
Apress, ISBN #: 978-1430249238)
Bibin W has been working with virtualization and cloud technologies, he is a subject
matter expert in VMware, Linux Container, Docker, Amazon Web Services, Chef and
Azure.
Bibin holds a Masters in Computer Science from SRM University, Chennai.
The authors can be reached at [email protected].
Acknowledgments
Special thanks go out to the people who have helped in creation of this book Dheeraj
Raghav for his creative inputs in the design of this book, Piyush Pandey for his reviews
and insights into the content.
The authors will like to acknowledge the creators of virtualization technologies and the
open source community for providing such powerful tools and technologies and enable
products and solutions which solve real business problems easily and quickly.
Preface
Docker is making waves in the technology circles and is rapidly gaining mindshare from
developers, startups, technology companies and architects.
We all know how virtualization has changed the datacenter and cloud forever,
virtualization has allowed enterprises and cloud providers to make the datacenter more
agile, manageable, cloud friendly and application friendly. However virtualization has
overheads of the guest operating system and costly licensing for virtualization software,
thus limiting the utilization of the host.
The Containerization technology is seeing resurgence with Docker, containerization has
been around since many years, and however it is now that Docker has revived the interest
of the technology community in containers.
Fundamental support for containerization was actually included in the Linux 2.6.24 kernel
to provide operating system-level virtualization and allow a single host to operate multiple
isolated Linux instances, called Linux Containers (LXC). LXC is based on Linux control
groups (cgroups) where every control group can offer applications complete resource
isolation (including processor, memory and I/O access). Linux Containers also offer
complete isolation for the container’s namespace, so supporting functions like file
systems, user IDs, network IDs and other elements usually associated with operating
systems are unique for each container.
Docker uses the container technology but creates a layer above the LXC layer for
packaging, deployment and migration of workloads to different hosts.
Docker container technology has taken the cloud and application development world by
storm since it was open-sourced a little over a year ago, offering a way to package and
deploy applications across a variety of Linux instances.
Enterprises stand to gain by further reducing the datacenter footprint and using the host’s
resources to their maximum using the Docker and LXC technology. Coupled with the ease
of migration and fast scale out of containers it is turning out to be a technology which is
well suited for the cloud use case.
Docker is also going to have an impact on the devops lifecycle, by providing capabilities
to support immutable infrastructure model, technologies like Docker may fundamentally
change the way the operations world works, rather than updating the current running
instances of operating systems, organizations may move to a model where the server
container itself is replaced with a newer version and the old ones are taken out.
This book will help our readers to appreciate the Docker technology, the benefits and
features provided by Docker and get a deep dive technical perspective on architecting
solutions using Docker.
The book will enable a reader to appreciate, install, configure, administer and deploy
applications on the Docker platform.
