k8s-scratch

A minimalist script to bootstrap a Kubernetes cluster for learning purpose.

No kubeadm or other bootstrapping tool (kops, kubespray, etc, ...), no Cloud provider (AWS, GCP), only a self-contained Bash script and vagrant + VirtualBox.

• Environment:
  • Ubuntu 16.04
  • Kubernetes 1.12
• The project follows the official documentation Creating a Custom Cluster from Scratch
• Automation is purposely minimal → 1 self-contained shell script simply chaining commands
• All commands should have a link to docs.k8s.io, unless out of K8s scope (e.g. Docker, Ubuntu/Debian) then a link to the third-party documentation
• No cloud provider → Vagrant + VirtualBox
• Iterations:
  • Bootstrap a single-node cluster
  • Bootstrap a 3-node cluster with 1 master
  • Bootstrap a 3-node cluster with 3 masters
  • Then we might play a bit:
    • Add a few more SSL certs
    • Add a network plugin (e.g. Calico, Flannel)
    • Spread services across more VMs
    • Etc...

Usage

Test the script using vagrant:

vagrant up
vagrant ssh