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Summary

By · Reviewed & last updated · Part of Kubernetes Tutorial

Wrapping up the Kubernetes track with what you can ship and where to go next.

What you learned + first NetworkPolicy

EXAMPLE
# Kubernetes summary

You can now:

- Operate kubectl + k9s daily
- Reason about Pods, Deployments, Services, ConfigMaps, Secrets
- Configure probes, rollouts, and PodDisruptionBudgets
- Apply NetworkPolicy for default-deny patterns
- Use HPA + VPA + Cluster Autoscaler
- Lock down RBAC and Pod Security Standards
- Author Helm charts and Kustomize overlays
- Write a small operator with controller-runtime

# Your next step - default-deny NetworkPolicy

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: default-deny
  namespace: app
spec:
  podSelector: {}
  policyTypes: [Ingress, Egress]
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-api-to-db
  namespace: app
spec:
  podSelector:
    matchLabels: { app: db }
  ingress:
    - from:
        - podSelector:
            matchLabels: { app: api }
      ports:
        - { protocol: TCP, port: 5432 }

Why it matters

Kubernetes is power and complexity in equal measure. Master the small set of core objects + Helm + GitOps before adopting service mesh, operators, or anything fancier. For most teams, choose K8s when you have multiple services and a platform team to run it.

Tip: Tweak the snippet with Try it Yourself », then sit the quiz at the bottom of the page.

Example

Example
# Next: CKAD/CKA exam, service mesh, operators, multi-cluster.
Try it Yourself »

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