Jsonnet for Platform Config

"Jsonnet for Platform Config: Reusable Kubernetes Manifests at Scale"
Kubernetes configuration rarely fails because YAML is hard—it fails because organizations scale: more clusters, more teams, more environments, more policies, and more exceptions. This book is written for platform engineers, SREs, and senior application engineers who need a principled way to generate and govern manifests without copy‑paste drift, fragile patch stacks, or environment forks. If you’re responsible for making Kubernetes configuration repeatable, reviewable, and safe under constant change, Jsonnet becomes a powerful engineering tool rather than “just templating.”
You’ll learn Jsonnet as a configuration language optimized for composing Kubernetes API objects: pure evaluation, functions, comprehensions, and—most importantly—object merge and overlay mechanics. From there, the book moves into designing reusable Jsonnet libraries with stable APIs: workload abstractions, networking and policy modules, naming/labeling conventions, and clean handling of CRDs. It then shows how to structure repositories, parameterize environments with external inputs, render deterministic multi-object outputs, and design promotion workflows from dev to prod while modeling per-cluster capability differences explicitly.
The focus is operational: compatibility strategies for Kubernetes API deprecations, validation and policy-as-code, golden-output testing, and CI/GitOps pipelines that render, diff, approve, and apply safely. Readers should already be comfortable with Kubernetes primitives and modern delivery workflows;