Kubernetes (K8s) Developer Skill

Roadmap Alignment: roadmap.sh/kubernetes Reference: Kubernetes Official Docs | Kubectl Cheat Sheet

Context for Docker Users

Since you are familiar with Docker, here is how concepts translate to Kubernetes:

• Container → Pod (A pod is the smallest deployable unit and usually contains one container, sometimes more).
• docker-compose.yml → Manifests (Usually split into multiple YAML files like Deployment, Service, ConfigMap).
• Docker Volumes → PersistentVolume (PV) / PersistentVolumeClaim (PVC).
• Port Mapping (-p 8080:80) → Service (Exposes your pods to the network).
• Environment Variables (.env) → ConfigMap (for non-sensitive data) and Secret (for sensitive data).

Core Standards & Best Practices

1. Declarative Configuration

• Always use YAML manifests and apply them via kubectl apply -f file.yaml.
• Avoid Imperative Commands: Do not use kubectl create or kubectl run for creating production resources. Keep everything version-controlled in Git (GitOps).