Learning CoreOS

Chapter 3. Creating Your CoreOS Cluster and Managing the Cluster

This chapter covers CoreOS clustering, providing information on the concepts and benefits of clustering. We will also learn how to set up clusters and get familiar with all the services involved in clustering with greater detail.

This chapter covers the following topics:

• Introduction to clustering
• The why and the benefits of clustering
• CoreOS clustering
• Creating a CoreOS cluster
• Discovery using etcd 
• Systemd
• Service deployment and High Availability (HA) using fleet

Introduction to clustering

There are two ways to scale a system. One is to scale vertically, that is, by adding more hardware resources to a machine. If the memory requirement of the system increases, add more memory; if more processing ...