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

ZooKeeper


ZooKeeper is another widely used and high-performance coordination service for distributed applications. Apache ZooKeeper was originally a subproject of Hadoop but is now a top-level project. It is a highly consistent, scalable, and reliable key-value store that can be used as a discovery service for a Docker Swarm v1 cluster. As mentioned previously, ZooKeeper uses Paxos, rather than Raft.

Similar to Etcd, when ZooKeeper forms a nodes cluster with a quorum, it has one leader and the remaining nodes are followers. Internally, ZooKeeper uses its own ZAB, ZooKeeper Broadcasting Protocol, to maintain consistency and integrity.