kustomize

Layer Kubernetes base configurations with environment overlays and patches.

1|Updated Mar 20, 2026
One-click install
npx skills add https://github.com/kaynetik/skills --skill kustomize-kaynetik
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: kustomize
Source: https://github.com/kaynetik/skills/tree/main/kustomize
Command: npx skills add https://github.com/kaynetik/skills --skill kustomize-kaynetik

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Kustomize enables template-free customization of Kubernetes manifests by layering a base set of resources with environment-specific overlays, patches, and generators, reducing duplication and drift.

Core Features & Use Cases

  • Layered manifests: organize base configurations and environment-specific overlays for dev, staging, and prod.
  • Patch and transformation support: apply strategic or JSON patches, image/tag updates, label changes, and namespace remapping without editing originals.
  • Generators: create ConfigMaps and Secrets from files and literals, enabling dynamic configuration during deployments.
  • GitOps-friendly rendering: validate rendered YAML with kubectl kustomize or kubectl apply -k before deployment.

Quick Start

Create a kustomization.yaml root and run kubectl kustomize overlays/dev to render the final manifest.

Frequently Asked Questions about kustomize

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I customize Kubernetes manifests for multiple environments without using templates?

You can customize Kubernetes manifests without templates by using Kustomize to layer a base configuration with environment-specific overlays and patches, reducing duplication and drift across dev, staging, and prod deployments.

What is the best way to apply patches to Kubernetes manifests?

The best way to apply patches to Kubernetes manifests is using Kustomize to layer strategic or JSON patches, image tag updates, label changes, and namespace remapping without directly editing your original base configuration files.

How do I generate ConfigMaps and Secrets for Kubernetes deployments from files?

Generate ConfigMaps and Secrets for Kubernetes deployments from files and literals by using Kustomize configMapGenerator and secretGenerator, enabling dynamic configuration injection directly into your GitOps workflow.

Does kubectl work with Kustomize overlays for validating rendered YAML?

Yes, kubectl works with Kustomize overlays to validate rendered YAML. You can run kubectl kustomize overlays/dev to preview the final manifest or use kubectl apply -k to deploy the layered configuration directly.

Can I update container image tags across environments without rewriting Kubernetes manifests?

Yes, you can update container image tags across environments without rewriting Kubernetes manifests by defining image tag updates within your Kustomize overlays, which modifies the rendered output while keeping your base configuration untouched.