Kubernetes
1. Pod Lifecycle
Pod stuck in Pending?
CrashLoopBackOff?
ImagePullBackOff?
2. Scheduling
Why pod not scheduled?
NodeSelector / taints / affinity issues?
3. Networking
Service not reachable?
ClusterIP vs NodePort vs LoadBalancer?
DNS issues?
4. Scaling
HPA not scaling?
CPU vs custom metrics?
5. Deployments & Rollouts
Rolling update stuck?
Rollback scenarios?
Zero downtime strategies?
6. Config & Secrets
ConfigMap not updating?
Secret injection issues?
7. Storage
PVC not binding?
Volume mount failures?
8. Observability
Logs missing?
Metrics not showing?
Debugging tools?
9. Security
RBAC denied?
Pod security policies?
10. Cluster Failures
Node goes down?
Control plane failure?
11. Resource Management
OOMKilled?
CPU throttling?
12. Multi-service Architecture
Service-to-service communication
Service mesh basics
