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Preface:

This book is inspired by Kelsey Hightower's work on Kubernetes. It tries to address areas which Kelsey's guide ("Kubernetes the Hard Way") does not cover, or are not explained well - or so I understood.

This ebook will show you how to setup a Kubernetes cluster on bare-metal. The setup may as well consist of VMs instead of real bare-metal machines. You can also implement the same concepts on AWS and GCE clouds, or any other cloud for that matter, such as Digital Ocean, Zetta, etc - except for the HA bits.

Note: The order of the chapters can change. This outline will change heavily in the coming days / weeks.

Chapter 1: What is Kubernetes?

  • (and why not plain docker, or docker swarm, etc?)
  • Concepts and terminology of Kubernetes.

Chapter 2: Selection of infrastructure and network technologies

  • Write about what type of hardware is needed. If not physical hardware, then what size of VMs are needed. etc.
  • Discuss what type of network technologies are we going to use. Such as flannel or CIDR, etc.
  • This will be a relatively short chapter.

Chapter 3: Provisioning of machines, Network setup

  • Here we provision our machines, and also setup networking.
  • This will have a couple of diagrams

Chapter 4: SSL certificates

Chapter 5: etcd nodes

  • Talk about what etcd is and how to set it up, including it's installation
  • Also show how to to setup etcd in HA mode.

Chapter 6: Kubernetes Master/Controller nodes

  • Talk about how kubernetes master node is setup
  • also talk about HA for controller nodes.
  • Include access control and Authentication/Authorization, etc.

Chapter 7: HA for Kubernetes Control Plane

  • Here we setup Corosync/Pacemaker to provide HA to Kubernetes.

Chapter 8: Kubernetes Worker nodes

  • Setup Kubernetes worker nodes.
  • Including docker
  • Setup networking (CNI/CIDR)
  • Setup remote access with Kubectl

Chapter 9: Verify various cluster components)

  • short chapter.
  • Just verification of components.
  • What to expect in logs, etc.

Chapter 10: Working with Kubernetes

  • Setting up a work computer to use kubectl and talk to kubernetes master.
  • Creating a simple nginx RC/Deployment
  • Scaling a Deployment
  • Accessing a pod from within pod network, using pod IPs
  • Creating a service using cluster IP and accessing it from within pod network
  • Creating a service using external IP and accessing it from outside the cluster network and also outside of kubernetes cluster.

Chapter 11: Praqma Load Balancer/Traefik - with HA

Chapter 12: Accessing HA Kubernetes service from outside the network

Chapter 13: Cluster add-ons

Chapter 14: Monitoring and Alerting

  • Some Visualizers (CAdvisor, fedora CockPit, kubernetes visualizer, etc)
  • Alerting?

Appendix A: DNS (dnsmasq)