README

Demo

Concepts

• k8s: https://kubernetes.io/docs/tutorials/kubernetes-basics/explore/explore-intro/
• bare-metal server -> docker prevision -> compute node(s) -> cluster
• cluster(us-east-1a) -> namespace
• 

Install

• Python >= 3.7
• Install kubectl
  • https://kubernetes.io/docs/tasks/tools/install-kubectl-macos/

     curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/darwin/amd64/kubectl"

• Install minikube (a local Kubernetes cluster)
  • https://minikube.sigs.k8s.io/docs/start/
  • commands:

  curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-darwin-amd64
  sudo install minikube-darwin-amd64 /usr/local/bin/minikube
  minikube start # start minikube
  minikube dashboard # start dashboard

  
• Install kopf
  • https://kopf.readthedocs.io/en/stable/install/
  • commands:

  pip install kopf

• Install kubernetes
  • https://github.com/kubernetes-client/python/blob/master/kubernetes/docs/CustomObjectsApi.md
  • pip install kubernetes

Create CRD

• create a CRD definition crd.yaml
• run kubectl apply -f crd.yaml to apply the CRD definition to the cluster
  • Note: to delete the CRD definition to the cluster

  kubectl delete crd ephemeralvolumeclaims.kopf.dev
  kubectl delete -f crd.yaml

• create a sample object obj.yaml
• run kubectl apply -f obj.yaml to create the sample object in the cluster

Create CRD operator

• create a CRD operator ephemeral.py
• run kopf run ephemeral.py --verbose to aookt