Traefik-route-k8s renders rules without stripPrefix middleware

[natalian98]

Bug Description

The traefik-route-k8s doesn't generate rules with the stripPrefix middleware, while the "ingress-per-app" does so.
Is this intentional? Is that middleware not needed with ingress-per-unit?

An example rule rendered by

• route charm:

http:
  routers:
    juju-prometheus-k8s-0-test-router:
      entryPoints:
      - web
      rule: Host(`prometheus-k8s-operator-0.prometheus-k8s-operator-endpoints.test.svc.cluster.local`)
      service: juju-prometheus-k8s-0-test-service
    juju-prometheus-k8s-0-test-router-tls:
      entryPoints:
      - websecure
      rule: Host(`prometheus-k8s-operator-0.prometheus-k8s-operator-endpoints.test.svc.cluster.local`)
      service: juju-prometheus-k8s-0-test-service
      tls:
        domains:
        - main: 10.64.140.43
          sans:
          - '*.10.64.140.43'
  services:
    juju-prometheus-k8s-0-test-service:
      loadBalancer:
        servers:
        - url: http://prometheus-k8s-operator-0.prometheus-k8s-operator-endpoints.test.svc.cluster.local:8080

• ingress-per-app:

http:
  middlewares:
    juju-sidecar-noprefix-test-identity-platform-login-ui-operator:
      stripPrefix:
        forceSlash: false
        prefixes:
        - /test-identity-platform-login-ui-operator
  routers:
    juju-test-identity-platform-login-ui-operator-router:
      entryPoints:
      - web
      middlewares:
      - juju-sidecar-noprefix-test-identity-platform-login-ui-operator
      rule: PathPrefix(`/test-identity-platform-login-ui-operator`)
      service: juju-test-identity-platform-login-ui-operator-service
    juju-test-identity-platform-login-ui-operator-router-tls:
      entryPoints:
      - websecure
      rule: PathPrefix(`/test-identity-platform-login-ui-operator`)
      service: juju-test-identity-platform-login-ui-operator-service
      tls:
        domains:
        - main: 10.64.140.43
          sans:
          - '*.10.64.140.43'
  services:
    juju-test-identity-platform-login-ui-operator-service:
      loadBalancer:
        servers:
        - url: http://identity-platform-login-ui-operator-0.identity-platform-login-ui-operator-endpoints.test.svc.cluster.local:8080

To Reproduce

1. juju deploy traefik-route-k8s root_url=...
2. juju deploy traefik-k8s
3. juju deploy prometheus-k8s
4. juju relate traefik-route-k8s prometheus-k8s
5. juju relate traefik-route-k8s traefik-k8s

Environment

n/a

Relevant log output

n/a

Additional context

No response

[simskij]

The middleware is not strictly needed in any routing mode. However, it often makes a lot of sense to have it to simplify reverse proxying. I just think no one has asked for this middleware to be available in the route charm, so no time has been invested in adding it.

[sed-i]

Related (for future reference): canonical/grafana-k8s-operator#246

[PietroPasotti]

@natalian98 can you try out #47 ?