Kubernetes Pod Template Generator

Problem Statement

Setting up Kubernetes pod templates from scratch is repetitive and error-prone. Every new service needs health checks, resource limits, security contexts, and environment configuration. I built a generator to enforce best practices by default.

Architecture

Tech Stack

• Python — Template generation logic
• Jinja2 — YAML templating
• Kubernetes API — Validation against the K8s API spec
• Docker — Containerized for CI/CD integration

Lessons Learned

1. Default to non-root containers — Most images don't need root; set runAsNonRoot: true
2. Always set resource limits — Without limits, a single pod can starve the node
3. preStop hooks matter — sleep 5 in preStop gives load balancers time to deregister the pod
4. Readiness != Liveness — Readiness controls traffic routing; liveness controls restarts. Different endpoints, different thresholds