Interview › Kubernetes, Docker, Helm & Podman
What does kubectl describe show that kubectl get does not?
Kubernetes, Docker, Helm & Podman · Intermediate level
Answer
kubectl get gives a compact current view. kubectl describe adds details such as events, conditions, selected node, image IDs, mounts, resource settings, probe status, and reasons behind scheduling or runtime failures.
Technical explanation
describe is especially useful because it includes chronological Events that kubectl get does not show by default.
For deeper inspection, pair describe with kubectl get -o yaml to see exact spec and status fields.
Troubleshooting starts from state and events: get, describe, logs, previous logs, events, and then node/runtime/network checks.
Separate scheduling failures, image pull failures, runtime failures, app failures, and traffic-routing failures so you do not fix the wrong layer.
Operational commands like drain and rollback must respect PDBs, probes, and workload disruption tolerance.
Hands-on example
1. In a non-production namespace, create this safe broken scenario: compare kubectl get, describe, and get -o yaml for the same Pod.
2. Follow a fixed triage order: kubectl get, describe, logs or logs --previous, events, rollout status, node status, and then runtime/network checks.
3. Fix only one variable at a time so the root cause is clear rather than accidentally masked.
4. Save the commands and final diagnosis as an interview-ready incident walkthrough.
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- Explain the Kubernetes control plane components (API server, etcd, scheduler, controller manager).
- What runs on a worker node (kubelet, kube-proxy, container runtime)?
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- How does a Deployment perform a rolling update, and how do maxSurge and maxUnavailable work?
- How do you roll back a Deployment, and how does Kubernetes track revisions?
- What is a Service, and what are the types (ClusterIP, NodePort, LoadBalancer, ExternalName)?