Systems

Cross-cutting subsystems that don't belong to a single binary. Each page here focuses on a piece of architecture that the components from the components section plug into.

System	Page	Where it lives
Authentication, authorization, admission	auth-and-admission.md	staging/src/k8s.io/apiserver/pkg/authentication, …/authorization, …/admission, plugin/pkg/admission, plugin/pkg/auth
API registry and storage	api-registry-and-storage.md	pkg/registry/, staging/src/k8s.io/apiserver/pkg/registry, …/storage
Garbage collection	garbage-collection.md	pkg/controller/garbagecollector/
Volume plugins	volume-plugins.md	pkg/volume/, staging/src/k8s.io/csi-translation-lib, pkg/controller/volume/
Networking and Services	networking.md	pkg/proxy/, pkg/registry/discovery, pkg/registry/networking, pkg/controller/endpointslice
Cloud providers	cloud-providers.md	staging/src/k8s.io/cloud-provider, cmd/cloud-controller-manager/
Dynamic Resource Allocation (DRA)	dra.md	staging/src/k8s.io/dynamic-resource-allocation, pkg/scheduler/framework/plugins/dynamicresources, pkg/kubelet/cm/dra
Feature gates and component config	feature-gates.md	pkg/features, staging/src/k8s.io/component-base/featuregate, staging/src/k8s.io/component-base/config

The pages are deliberately narrower than the per-component pages — they walk through code that may live in multiple binaries.