traefik/docs/content/migration/v3.md

title	description
Traefik Migration Documentation	Learn the steps needed to migrate to new Traefik Proxy v3 versions. Read the technical documentation.

Migration: Steps needed between the versions

v3.0 to v3.1

Kubernetes Provider RBACs

Starting with v3.1, the Kubernetes Providers now use the EndpointSlices API (Kubernetes >=v1.21) to discover service endpoint addresses.

Therefore, in the corresponding RBACs (see KubernetesIngress, KubernetesCRD, and KubernetesGateway provider RBACs), the endpoints right has to be removed and the following endpointslices right has to be added.

  ... 
  - apiGroups:
      - discovery.k8s.io
    resources:
      - endpointslices
    verbs:
      - list
      - watch
  ...