This resource is designed to help with the preparation for the exam as a „Certified Kubernetes Administrator“ (CKA).
The exam for the CKA is a supervised hands-on online exam you can conduct at home on your computer within a time frame of three hours. The exam application will provide you with a Linux console and a single tab web browser that is restricted to the kubernetes.io domain, Therefore, one part of the preparation consists of learning how to quickly find information on kubernetes.io.
However, knowing kubernetes.io well, will not be sufficient: three hours might seem a long time for an exam, but it is cramped with tasks that take their time to accomplish. Therefore, you should be familiar with all the topics of the exam curriculum, to get quickly through.
- Overview: Cloud Native Computing Foundation: Certified Kubernetes Administrator (CKA) Program
- Online Training:
- CKA Content: Curriculum of the CKA (PDF Documents via Github)
- Interactive Cheat Sheet: PODs of Minerva (does not work on Chrome, but seems to work on Microsoft Edge)
Kubernetes Labs based on LSF458, v 1.14.1
The following Kubernetes labs are loosely following the LSF458 curriculum (work in progress)
- Overview (this blog post)
- Deploy a simple Application
- Resource Management
- Node Maintenance
- Kubernetes API
- Jobs and CronJobs
- Labels and Node Selectors
- Taints and Tolerations
- Affinity, and Anti-Affinity
Following chapters are planned:
- Performance Management with Metrics
- Custom Resource Definition
- (Optional) Kubernetes Federation? There are no labs found on LSF458 on that topic.
- Helm Charts
- Kubernetes Security Policies and Roles
- (Optional) Installation via kubeadm revisited
Let us head towards the Certified Kubernetes Administrator Certification…
CKA 1.15 Curriculum
source: https://github.com/cncf/curriculum, August 2019, certified_kubernetes_administrator_exam_v1.15.pdf
5% – Scheduling
- Use label selectors to schedule Pods.
- Understand the role of DaemonSets.
- Understand how resource limits can affect Pod scheduling.
- Understand how to run multiple schedulers and how to configure Pods to use them.
- Manually schedule a pod without a scheduler.
- Display scheduler events.
- Know how to configure the Kubernetes scheduler.
5% – Logging/Monitoring
- Understand how to monitor all cluster components.
- Understand how to monitor applications.
- Manage cluster component logs.
- Manage application logs.
8% – Application Lifecycle
- Understand Deployments and how to per
form rolling updates and rollbacks.
- Know various ways to configure applications.
- Know how to scale applications.
- Understand the primitives necessary to
create a self-healing application.
11% – Cluster Maintenance
- Understand Kubernetes cluster upgrade process.
- Facilitate operating system upgrades.
- Implement backup and restore methodologies.
12% – Security
- Know how to configure authentication and authorization.
- Understand Kubernetes security primitives.
- Know to configure network policies.
- Create and manage TLS certificates for cluster components.
- Work with images securely.
- Define security contexts.
- Secure persistent key value store.
7% – Storage
- Understand persistent volumes and know how to create them.
- Understand access modes for volumes.
- Understand persistent volume claims primitive.
- Understand Kubernetes storage objects.
- Know how to configure applications with persistent storage.
10% – Troubleshooting
- Troubleshoot application failure.
- Troubleshoot control plane failure.
- Troubleshoot worker node failure.
- Troubleshoot networking.
19% – Core Concepts
- Understand the Kubernetes API primitives.
- Understand the Kubernetes cluster architecture.
- Understand Services and other network primitives.
11% – Networking
- Understand the networking configuration on the cluster nodes.
- Understand Pod networking concepts.
- Understand service networking.
- Deploy and configure network load balancer.
- Know how to use Ingress rules.
- Know how to configure and use the cluster DNS.
- Understand CNI.
12% – Installation, Configuration & Validation
- Design a Kubernetes cluster.
- Install Kubernetes masters and nodes.
- Configure secure cluster communications.
- Configure a Highly-Available Kubernetes cluster.
- Know where to get the Kubernetes release binaries.
- Provision underlying infrastructure to deploy a Kubernetes cluster.
- Choose a network solution.
- Choose your Kubernetes infrastructure configuration.
- Run end-to-end tests on your cluster.
- Analyse end-to-end tests results.
- Run Node end-to-end tests.
- Install and use kubeadm to install, configure, and manage Kubernetes clusters