Kubernetes the hard way - w/ Ansible

Work in progress!

About

This is my humble version of a workshop to deploy a Kubernetes cluster the "hard way", as the legendary Kelsey Hightower called it. It is -of course- inspired in Kelsey's famous repo [kubernetes-the-hard-way](https://github.com/kelseyhightower/kubernetes-the-hard-way) and also in Mumshad Mannambeth's repo [mmumshad-kubernetes-the-hard-way](https://github.com/ddometita/mmumshad-kubernetes-the-hard-way) -who is an excelent Udemy teacher and founder of KodeKloud platform.

I've only performed kubernetes-the-hard-way twice -based on local VMs- back when I was preparing for my CKA exam. Since I recall that being a quite daunting task but incredibly rewarding knowledge-wise, I've been wanting to do it again in order to fortify my K8s skills. Since I recently started learning and using Ansible, I though why not bring these two together -which by the way match quite right- and kill two birds with one stone -sort of speak-.

Tools and Infrastructure

Infrastructure provisioning is currently out of this project's scope and being done manually (Vagrant can be used).

A bunch of Ansible roles will be leveraging all the tasks that need to be performed on the nodes (Ubuntu 20.04 LTS based) in order to have the cluster up and running. The tasks are the following:

Master nodes (x3)

• Install Kubernetes binaries
• Generate CA certificates
• Generate client certificates for each component and one for admin user
• Distribute the certificates
• Generating kube config files for each component
• Generating systemd unit files for each component
• Bootstrap Data Encryption
• Installing etcd w/ certificates, systemd unit and encryption at rest
• Bootstrap the nodes

Worker nodes (x3)

• Install Kubernetes binaries
• Distribute the certificates
• Generating kube config files for each component
• Generating systemd unit files for each component
• Bootstrap the nodes
• Install and setup CNI plugin for Pod Networking

Other

• Install CoreDNS addon as K8s deployment (Service and pod DNS)
• Setup kube config file for administrator
• Connect to the cluster and perform E2E tests

tl;dr

Work in progress!

A hard (self-setup, self-configured and self-managed) Kubernetes cluster deployment, but mixed with the power of Ansible.

Requirements

• Ansible 2.13.1
• Python 3
• OpenSSL