Book Image

Native Docker Clustering with Swarm

By : Fabrizio Soppelsa, Chanwit Kaewkasi
Book Image

Native Docker Clustering with Swarm

By: Fabrizio Soppelsa, Chanwit Kaewkasi

Overview of this book

Docker Swarm serves as one of the crucial components of the Docker ecosystem and offers a native solution for you to orchestrate containers. It’s turning out to be one of the preferred choices for Docker clustering thanks to its recent improvements. This book covers Swarm, Swarm Mode, and SwarmKit. It gives you a guided tour on how Swarm works and how to work with Swarm. It describes how to set up local test installations and then moves to huge distributed infrastructures. You will be shown how Swarm works internally, what’s new in Swarmkit, how to automate big Swarm deployments, and how to configure and operate a Swarm cluster on the public and private cloud. This book will teach you how to meet the challenge of deploying massive production-ready applications and a huge number of containers on Swarm. You'll also cover advanced topics that include volumes, scheduling, a Libnetwork deep dive, security, and platform scalability.
Table of Contents (18 chapters)
Native Docker Clustering with Swarm
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Dedication
Preface

Swarm on OpenStack


Speaking of private cloud, the most popular open source solution for IaaS is OpenStack. OpenStack is a great ecosystem of programs (formerly known as projects), with the goal of providing a so-called cloud operating system. The core OpenStack programs are:

  • Keystone: The identity and authorization system

  • Nova: The virtual machine abstraction layer. Nova can be plugged with virtualization modules, such as Libvirt, VMware

  • Neutron: The network module, which handles tenant networks, instances ports, routing, and traffic

  • Cinder: The storage module responsible for handling volumes

  • Glance: The image storage

Everything is glued up by additional actors:

  • A database system, such as MySQL, keeping the configurations

  • An AMQP broker, such as Rabbit, to queue and deliver operations

  • A proxy system, such as HAproxy, to proxy HTTP API requests

In a typical VM creation in OpenStack, the following happens:

  1. A user either from the UI (Horizon) or from the CLI decides to spawn a VM.

  2. She/he clicks a button...