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CoreOS Essentials by Rimantas Mocevicius

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Chapter 4. Managing Clusters

In this chapter, we will cover how to setup and manage a local CoreOS cluster on a personal computer. You will learn how to bootstrap a three-peer cluster, customize it via the cloud-config file, and schedule a fleet unit in the cluster.

In this chapter, we will cover the following topics:

  • Bootstrapping a local cluster
  • Customizing a cluster via thecloud-config file
  • Scheduling a fleet unit in the cluster

You are going to learn how to setup a simple three-node cluster on your personal computer.

Determining the optimal etcd cluster size

The most efficient cluster size is between three and nine peers. For larger clusters, etcd will select a subset of instances to participate in order to keep it efficient.

The bigger the cluster, ...

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