What you have to know about Certified Kubernetes Administrator (CKA)
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The document provides information about the Certified Kubernetes Administrator (CKA) exam, including its cost, format, and requirements for preparation. It describes the exam content, environment, and offers tips for success, such as understanding core concepts and practicing extensively. The certification is valid for two years and is conducted online with specific guidelines for candidates during the exam.
![9GDG Cloud Bangkok
Core Concepts
• Master Components
• kube-api-server
• kube-controller-manager
• kube-scheduler
• Non-master components
• kubelet
• kube-proxy
• Kubernetes Objects
• Pod
• Service
• Ingress
• Volume
• Namespace
• ReplicaSet
• Deployment
• Job
• [CronJob]
• [StatefulSet]
• [DaemonSet]](https://image.slidesharecdn.com/20171121whatyouhavetoknowaboutcka-171121084436/85/What-you-have-to-know-about-Certified-Kubernetes-Administrator-CKA-9-320.jpg)
What you have to know about Certified Kubernetes Administrator (CKA)
- 1. What you have to know about Certified Kubernetes Administrator Jirayut Nimsaeng (Dear) CEO/Founder Opsta GDG Cloud Bangkok 2nd Meetup @ Tencent November 21, 2017 GDG Cloud Bangkok
- 2. 2GDG Cloud Bangkok ● Jirayut Nimsaeng (Dear) ● Interested in Cloud and Open Source ● Agile Practitioner with DevOps Driven ● CEO and Founder Opsta ● First Certified Kubernetes Administrator in Thailand #whoami
- 3. 3GDG Cloud Bangkok Facts • Created by Cloud Native Computing Foundation (CNCF) • Cost $300 with one free retake • Online performance-based exam with proctor • Use Kubernetes version 1.6.2 on Ubuntu 16.04 • Exam expected to take 3-4 hours to complete • Passing score is 74% • Certification valid for 2 years • Register here https://www.cncf.io/certification/expert/
- 4. 4GDG Cloud Bangkok Preparation • PC or Laptop • Clean surface • Windows, MacOS or Linux • Chrome or Chromium Browser • Reliable Internet • Webcam • Microphone • Private space • Passport or ID card • Need 1-3 days for exam reservation
- 5. 5GDG Cloud Bangkok Exam Panel
- 6. 6GDG Cloud Bangkok While Exam • You can browse for anything • No K8s dashboard. You can use only command-line • You can not note down anything except included Notepad • Proctor has an ultimate timer • You can reboot exam server • Use Ctrl+Alt+W instead of Ctrl+W • Copy & Paste key • Linux: select text to copy and paste with middle mouse • Mac: ⌘+C to copy and ⌘+V to paste • Windows: Ctrl+Insert to copy and Shift+Insert to paste • You can use Screen or tmux
- 7. 7GDG Cloud Bangkok CKA Exam Environment Cluster Members CNI Description k8s 1 CA, 1 etcd, 1 master, 2 worker flannel non-HA k8s cluster Hk8s 1 CA, 3 etcd, 3 master, 1 loadbalancer, 2 worker calico HA k8s cluster bk8s 1 CA, 1 etcd, 1 master, 1 worker flannel non-HA k8s cluster wk8s 1 CA, 1 etcd, 1 master, 2 worker flannel non-HA k8s cluster ek8s 1 CA, 1 etcd, 1 master, 2 worker flannel non-HA k8s cluster fk8s 1 CA, 1 etcd, 1 base node none k8s cluster none missing master node ik8s 1 CA, 1 etcd, 1 master, 1 base node flannel k8s cluster - missing worker node tk8s 1 CA, 1 etcd, 1 master, 1 worker flannel non-HA k8s cluster
- 8. 8GDG Cloud Bangkok Curriculum • 5% Scheduling • 5% Logging/Monitoring • 8% Application Lifecycle Management • 11% Cluster Maintenance • 12% Security • 7% Storage • 10% Troubleshooting • 19% Core Concepts • 11% Networking • 12% Installation, Configuration & Validation
- 9. 9GDG Cloud Bangkok Core Concepts • Master Components • kube-api-server • kube-controller-manager • kube-scheduler • Non-master components • kubelet • kube-proxy • Kubernetes Objects • Pod • Service • Ingress • Volume • Namespace • ReplicaSet • Deployment • Job • [CronJob] • [StatefulSet] • [DaemonSet]
- 10. 10GDG Cloud Bangkok Core Concepts • Namespace is use a lot • Label and Selector • Create multiple containers in Pod with Init Container https://kubernetes.io/docs/concepts/workloads/pods/init-containers/ • Control output https://kubernetes.io/docs/user-guide/kubectl-overview/ • Job https://kubernetes.io/docs/concepts/workloads/controllers/jobs-run-to-completion/ • Update and Scaling Deployment • History and Rollback Deployment
- 11. 11GDG Cloud Bangkok Installation, Configuration and Validation • Create K8s cluster from binaries • Must use token and certificates • Configure to start K8s components with systemd • Use systemctl to enable/disable services • Troubleshooting with K8s log files • Backup and restore etcd • https://github.com/kelseyhightower/kubernetes-the-hard-way
- 12. 12GDG Cloud Bangkok Networking • Understand the service concept with NodePort type • Find service IP address https://kubernetes.io/docs/concepts/services-networking/service/ • Ingress https://kubernetes.io/docs/concepts/services-networking/ingress/
- 13. 13GDG Cloud Bangkok Volume • Volume https://kubernetes.io/docs/concepts/storage/volumes/ • Persistent Volume and Persistent Volume Claim https://kubernetes.io/docs/concepts/storage/persistent-volumes/ • Storage Class https://kubernetes.io/docs/concepts/storage/storage-classes/
- 14. 14GDG Cloud Bangkok Security • Network Policy https://ahmet.im/blog/kubernetes-network-policy/ • Secret both file and env https://kubernetes.io/docs/concepts/configuration/secret/
- 15. 15GDG Cloud Bangkok Troubleshooting, Monitoring/Logging • Debug with kubectl describe https://kubernetes.io/docs/tasks/debug-application-cluster/debug-application-introspection/ • Logging with kubectl logs
- 16. 16GDG Cloud Bangkok Tips • Practice, practice and practice • Question 60% is for developer and 40% is for administrator • Kubernetes version is 1.6.2 so watch out for compatibility and apiVersion • kubectl explain is your friend • Questions is an independent task so you can go back and forward • Create manifest file for each question • Challege yourself with https://github.com/kelseyhightower/kubernetes-the-hard-way