traefik/pkg/provider/kubernetes/crd/fixtures/with_middleware_crossprovider.yml

apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
  name: stripprefix
  namespace: default

spec:
  stripPrefix:
    prefixes:
      - /tobestripped

---
apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
  name: addprefix
  namespace: foo

spec:
  addPrefix:
    prefix: /tobeadded

---
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
  name: test2.crd
  namespace: default

spec:
  entryPoints:
    - web

  routes:
    - match: Host(`foo.com`) && PathPrefix(`/tobestripped`)
      priority: 12
      kind: Rule
      services:
        - name: whoami
          port: 80
      middlewares:
        - name: stripprefix
        - name: addprefix
          namespace: foo
        - name: basicauth@file
        - name: redirect@file
          namespace: foo