Kubernetes Advanced Features & Extensibility

Requirements

1. Create a CRD and deploy an instance of the custom resource
2. Install or develop a simple Kubernetes Operator (e.g., using Operator SDK)
3. Enable and test an Admission Controller (e.g., PodSecurity)
4. Define a PodDisruptionBudget for your web application
5. Create and apply a PriorityClass to critical workloads

Stretch goals

• Write a basic webhook Admission Controller
• Extend an existing Operator with new custom logic
• Benchmark scheduling differences with PriorityClasses

Deliverables

• CRD and Operator manifests in your repo
• Admission Controller configuration
• PodDisruptionBudget and PriorityClass YAMLs

Links

• Custom Resources
• Kubernetes Operators
• Pod Disruption Budgets

Learning Objectives

Define and use CustomResourceDefinitions (CRDs)

Understand and deploy Kubernetes Operators

Configure Admission Controllers

Implement PodDisruptionBudgets for high availability

Apply PriorityClasses for workload scheduling

You will gain deep insights into extending Kubernetes beyond core APIs.