skill-kustomize-deployments

Kustomize overlays manage Kubernetes manifests across multiple environments by providing a base configuration and applying environment-specific changes. This prevents duplication and drift while preserving a shared base.

To promote a Kubernetes deployment, update the environment-specific overlays rather than reconfiguring all manifests. This base/overlays structure enables safe, repeatable promotion paths from development to production.

The best way to structure Kustomize overlays is using a documented base/overlays folder layout. This separates dev, staging, and production workflows while modifying only what is needed per environment.

Apply the Kustomize development overlay for local testing by running the command kubectl -k deployments/k8s/overlays/dev. This applies the environment-specific configuration to your Kubernetes cluster.

No, you maintain a single base manifest and apply environment-specific overlays without rewriting the core files. Kustomize overlays let you modify only what is needed per environment while preserving the shared base.

Managing Kubernetes configurations across multiple environments leads to drift due to duplication. Kustomize overlays solve this by maintaining a single base manifest and applying environment-specific changes deterministically.