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Certified Kubernetes Application Developer (CKAD) Study Notes

Official CKAD exam page

https://www.cncf.io/certification/ckad/


2Hrs | Cost $300 | Online Exam
K8s version 1.20 (Jan 22, 2021)

CKAD Curriculum

Updated exam curriculum for v1.20
https://github.com/cncf/curriculum/

Domain Weight
Core Concepts 13%
• Understand Kubernetes API primitives
• Create and configure basic Pods
Multi-Container Pods 10%
• Understand Multi-Container Pod design patterns (e.g. ambassador, adapter, sidecar)
Pod Design 20%
• Understand Deployments and how to perform rolling updates
• Understand Deployments and how to perform rollbacks
• Understand Jobs and CronJobs
• Understand how to use Labels, Selectors, and Annotations
State Persistence 8%
• Understand PersistentVolumeClaims for storage
Configuration 18%
• Understand ConfigMaps
• Understand SecurityContexts
• Define an application’s resource requirements
• Create & consume Secrets
• Understand ServiceAccounts
Observability 18%
• Understand LivenessProbes and ReadinessProbes
• Understand container logging
• Understand how to monitor applications in Kubernetes
• Understand debugging in Kubernetes
Services & Networking 13%
• Understand Services
• Demonstrate basic understanding of NetworkPolicies

Kubernetes Documentation


CKAD Training

CKAD Lab Exercises


CKAD Exam Tips

  • Time management is key!
    • You have 15-20 performance-based tasks to perform in 2 hours, so an average of 6-8 min per task. Some tasks are easy but some others will take much more time.
    • Get all questions done:
      • Make sure to go through all 15-20 tasks
      • Get all the easiest tasks done first!
    • Never get stuck:
      • If a task is seems difficult or it's taking you more than 2-3 min, then flag it and keep moving to get any easy task done first.
      • Then go back to each of the flagged tasks afterwards.

  • Setup kubectl alias and autocomplete
    • source <(kubectl completion bash)
    • alias k=kubectl
    • complete -F __start_kubectl k

  • Setup an shell variable to easily generate resource specs in YAML format:
    • export do="--dry-run=client -o yaml"
      • then we can run:
      • k run pod1 --image=nginx $do

  • Setup VIM for yaml by adding these lines to the ~/.vimrc configuration file:

    • set et or set expandtab (spaces instead of tabs)
    • set si or ```set smartindent`` (automatic and smart indentation)
    • set ts=2 or set tabstop=2 (the number of spaces that a tab equates to)
    • set sts=2 or set softtabstop=2 (the number of spaces to use when expanding tabs)
    • set sw=2 or set shiftwidth=2 (the number of spaces to use when indenting or de-indenting a line)
    # .vimrc
set et
set si
set ts=2
set sts=2
set sw=2

  • Use kubectl shortnames:

    • no po ns deploy svc ing ds netpol pv pvc sa cm ep sc sts ...

  • Use imperative commands whenever possible:
    • E.g. use: k run -h, k create deploy -h, k expose -h...
    • instead of: k apply -f <filename.yaml>



  • Use -w (i.e. --watch=true) to start watching updates to a particular object.
    • k get po -w to watch your pods