website/content/en/docs/reference/glossary/admission-controller.md

title	id	date	full_link	short_description	aka	tags
Admission Controller	admission-controller	2019-06-28	/docs/reference/access-authn-authz/admission-controllers/	A piece of code that intercepts requests to the Kubernetes API server prior to persistence of the object.		extension security

A piece of code that intercepts requests to the Kubernetes API server prior to persistence of the object.

Admission controllers are configurable for the Kubernetes API server and may be “validating”, “mutating”, or both. Any admission controller may reject the request. Mutating controllers may modify the objects they admit; validating controllers may not.

• Admission controllers in the Kubernetes documentation