CKA-Exercises

Note: The repository is currently not compelete and we are working on trying to get good content out very soon. Thank you for your patience!

A set of curated exercises to help prepare you for the Certified Kubernetes Administrator Exam by the Cloud Native Computing Foundation

Contributing

Pull Request process

• Fork the repo and create your branch from your forked repo
• Please try to stick to the layout we follow in terms of the README markdown
• Issue that PR
• This will be reviewed by the team and merged

Shortcuts and things to keep in mind when going through this repo

• NS = Namespace
• SA = Service account
• Po = Pod
• NetPol = Network policy
• PSP = Pod security policy
• RBAC = Role-based access control
• k = kubectl
• SVC = Service

Core Concepts

• Some basics of K8s and references to other useful repos

Storage

• Understand storage classes, persistent volumes
• Understand volume mode, access modes and reclaim policies for volumes
• Understand persistent volume claims primitive
• Know how to configure applications with persistent storage

Troubleshooting

• Evaluate cluster and node logging
• Understand how to monitor applications
• Manage container stdout & stderr logs
• Troubleshoot application failure
• Troubleshoot cluster component failure
• Troubleshoot networking

Workloads & Scheduling

• Understand deployments and how to perform rolling update and rollbacks
• Use ConfigMaps and Secrets to configure applications
• Know how to scale applications
• Understand the primitives used to create robust, self-healing, application deployments
• Understand how resource limits can affect Pod scheduling
• Awareness of manifest management and common templating tools

Cluster Architecture, Installation & Configuration

• Manage role based access control (RBAC)
• Use Kubeadm to install a basic cluster
• Manage a highly-available Kubernetes cluster
• Provision underlying infrastructure to deploy a Kubernetes cluster
• Perform a version upgrade on a Kubernetes cluster using Kubeadm
• Implement etcd backup and restore

Services & Networking

• Understand host networking configuration on the cluster nodes
• Understand connectivity between Pods
• Understand ClusterIP, NodePort, LoadBalancer service types and endpoints
• Know how to use Ingress controllers and Ingress resources
• Know how to configure and use CoreDNS
• Choose an appropriate container network interface plugin

Mock Exam Questions

• Practice mock exam questions.

Useful resources and materials

Further reading

Other Useful repos

• CKA repo by Walid Shaari