Ingressroute configuration for multiple services - AKS

Traefik Traefik v2
1

I am trying to replace Azure Application Gateway (AGW) with Traefik and facing issues while at it. I have multiple K8S services served over port 80 and one of them is overridden using this ingress annotation for AGW - appgw.ingress.kubernetes.io/override-frontend-port: "8200".

I am trying to use IngressRoute approach on Traefik (installed using Helm) and there doesn't seem to be an equivalent for the annotation here. I don't mind if it is successfully served over port 80.

This is the manifest I am applying over vanilla Traefik setup that I have.

---
apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
  name: ssl-redirect
spec:
  redirectScheme:
    scheme: https
    permanent: true

---
apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
  name: redirect-to-app1
  namespace: <namespace>
spec:
  redirectRegex:
    regex: "^http://[^/]+/$"
    replacement: "http://$${1}/app1"
    permanent: true

---
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
  name: app-ingress-route
  namespace: <namespace>
spec:
  entryPoints:
    - websecure
    - web
  routes:
    - match: PathPrefix(`/`)
      kind: Rule
      services:
        - name: app1-service
          namespace: <namespace>
          port: 80
      middlewares:
        - name: ssl-redirect
        - name: redirect-to-app1
    - match: PathPrefix(`/app2`)
      kind: Rule
      services:
        - name: app2-service
          namespace: <namespace>
          port: 80
      middlewares:
        - name: ssl-redirect
  tls: 
    secretName: sslcert

Coming to the current situation,

  1. <url>/app1 works, <url>/ redirects to the former as expected. HTTPS is also taken care of
  2. <url>/app2 fails to load resources. With the app gateway in place, it loaded fine from <url>:8200/app2 but does not happen in the current form. The request URLs as seen in the developer tools don't have app2 in them and the status code shows 404. Changing the application code is not an option for us.

How to handle this situation?