Kustomize: Manage K8S manifests natively
summary
Kustomize manages Kubernetes manifests natively and is built into kubectl from version 1.14 onward so you run kubectl apply -k. It uses bases and overlays that reference a base YAML set and apply declarative changes using the JSON patch format (strategic merge/JSON6902), can inject namespaces, prefixes/suffixes, generate Secrets and ConfigMaps from sources, and layer patches onto Helm-rendered templates. It avoids Helm templating logic and Tiller, letting teams reuse unmodified base manifests and apply environment-specific customizations.
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