Feature Deprecation Notices

This page is maintained and updated periodically to reflect our roadmap and any decisions around feature deprecation.

Feature	Deprecated	End of Support	Removal
Kubernetes Ingress API Version networking.k8s.io/v1beta1	N/A	N/A	3.0
CRD API Version apiextensions.k8s.io/v1beta1	N/A	N/A	3.0
Entry point underscoreHeadersStrategy option	3.7.12	N/A	N/A

Impact

Kubernetes Ingress API Version networking.k8s.io/v1beta1

The Kubernetes Ingress API Version networking.k8s.io/v1beta1 support is removed in v3. Please use the API Group networking.k8s.io/v1 instead.

Traefik CRD Definitions API Version apiextensions.k8s.io/v1beta1

The Traefik CRD definitions API Version apiextensions.k8s.io/v1beta1 support is removed in v3. Please use the API Group apiextensions.k8s.io/v1 instead.

Entry Point underscoreHeadersStrategy Option

Starting on 3.7.12 the underscoreHeadersStrategy entry point option is deprecated, please use the aliasHeadersStrategy option instead. Underscores are only one of the characters making a header name alias another one, and aliasHeadersStrategy handles them all. An entry point cannot configure both options with different values.