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content/en/docs/reference/access-authn-authz/extensible-admission-controllers.md

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 - liggitt
 - jpbetz
 title: Dynamic Admission Control
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 In addition to [compiled-in admission plugins](/docs/reference/access-authn-authz/admission-controllers/),
 admission plugins can be developed as extensions and run as webhooks configured at runtime.
 This page describes how to build, configure, use, and monitor admission webhooks.
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 ## What are admission webhooks?
 
 Admission webhooks are HTTP callbacks that receive admission requests and do
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 plane, exclude the `kube-system` namespace from being intercepted using a
 [`namespaceSelector`](#matching-requests-namespaceselector).
 
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