DevOps: Puppet, Docker, and Kubernetes

Chapter 8. Internode Coordination

	"Rest is not idleness, and to lie sometimes on the grass under trees on a summer's day, listening to the murmur of the water, or watching the clouds float across the sky, is by no means a waste of time."
	--John Lubbock

In this chapter, we will cover the following recipes:

• Managing firewalls with iptables
• Building high-availability services using Heartbeat
• Managing NFS servers and file shares
• Using HAProxy to load-balance multiple web servers
• Managing Docker with Puppet

Introduction

As powerful as Puppet is to manage the configuration of a single server, it's even more useful when coordinating many machines. In this chapter, we'll explore ways to use Puppet to help you create high-availability clusters, share files across ...