Learning Path: Certified Kubernetes Application Developer (CKAD) Prep Course

Source of these Notes

📌 TABLE OF CONTENTS

Module 1: Exam Details and Resources

• Get information about a particular API Object

  kubectl explain pods.spec
  kubectl create --help
  

• Alias kubectl alias

  alias k=kubectl
  

• Setting current context

  kubectl config set-context <context-of-question> --namespace=<namespace of question>
  

• Delete all objects forcefully

  kubectl delete pods <pod-name> --force
  

Module 2: Core Concepts

Object creation and management

• Imperative Approach

  kubectl run nginx --image=nginx --restart=Never
  

• Declarative Approach - create a yaml file and then execute kubectl apply -f

• Hybrid approach - generate a yaml file from imperative approach

  kubectl run nginx --image=nginx --restart=Never --dry-run=client -o yaml > output.yaml
  

--dry-run=client does not create an actual resource

Kubernetes uses etcd datastore to store data

Understanding Pods

Control flow

kubectl ➡️ API Server ➡️ etcd ➡️ Scheduler ➡️ Kubelet ➡️ Pod ➡️ Docker