kubernetes-patterns

Kubernetes Patterns

Production-grade Kubernetes patterns for deploying, managing, and debugging workloads reliably.

When to Activate

• Writing Kubernetes manifests (Deployments, Services, Ingress, Jobs)
• Configuring resource requests/limits, liveness/readiness probes
• Setting up RBAC, namespaces, or ServiceAccounts
• Managing configuration and secrets in K8s
• Debugging CrashLoopBackOff, OOMKilled, pending pods, or image pull errors
• Configuring HPA (Horizontal Pod Autoscaler) or PodDisruptionBudgets
• Reviewing K8s YAML for security or correctness

When to Use

Same as When to Activate above. This alias satisfies repo skill-format conventions. Use this skill any time you are writing, reviewing, or debugging Kubernetes YAML and workloads.

How It Works

This skill provides copy-pasteable, production-grade YAML patterns and kubectl debugging commands organized by task:

1. Deployment template — A fully configured production Deployment with security context, rolling update strategy, all three probe types, resource limits, and environment injection from ConfigMap/Secret.
2. Probes — Decision table for startup vs liveness vs readiness, with correct failureThreshold × periodSeconds math.
3. Services & Ingress — ClusterIP, LoadBalancer, and TLS Ingress patterns with cert-manager annotations.
4. ConfigMaps & Secrets — envFrom, file-mount, and external secrets guidance.
5. Resource management — Requests vs limits rules of thumb by workload type (web API, JVM, worker, sidecar).
6. RBAC — Least-privilege ServiceAccount → Role → RoleBinding chain.
7. HPA & PDB — Autoscaling and node-drain safety configurations.
8. Jobs & CronJobs — One-off and scheduled workload patterns with correct restartPolicy.
9. kubectl cheatsheet — Logs, exec, rollback, port-forward, dry-run, and common error diagnosis commands.
10. Anti-patterns & checklist — What NOT to do, and a security/reliability/observability checklist.