Ingress-nginx: redirects not working with no http rule specified

[slabber]

If I want to create an ingress with just a redirect and nothing else then I should be able to specify it like this:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: example-301
  annotations:
    kubernetes.io/ingress.class: nginx
    ingress.kubernetes.io/permanent-redirect: http://to.example.com
spec:
  rules:
  - host: from.example.com

However this does not work and no redirect config is added. This is probably because of this:
controller.go:702] ingress rule default/example-301 does not contain HTTP rules, using default backend

If I add a dummy http path and backend then the redirect is added correctly.

[aledbf]

Closing. This works as expected. You need a rule. Please keep in mind you can have multiple rules for the same hostname and different paths. This requirement makes sure you only get a redirect for the rule where the annotation is configured and not all the paths

[adecarolis]

Hello,
Could anybody provide a working example? We can't figure out how to use this.
Where is the rule supposed to be?
Thanks

[adecarolis]

Just in case anyone else lands in here, the correct annotation is now: nginx.ingress.kubernetes.io/permanent-redirect

[svenbovens]

This worked for me:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    nginx.ingress.kubernetes.io/ssl-redirect: "false"
    nginx.ingress.kubernetes.io/permanent-redirect: "https://main.com"
  name: main-alias
spec:
  rules:
  - host: alternate.com
    http:
      paths:
      - backend:
          serviceName: main
          servicePort: 8080
  tls:
  - hosts:
    - alternate.com
    secretName: alternate-tls

The backend configuration seemed to be required for the redirect config to be picked up, even though it will never be used in this case. I also disabled the ssl redirect to prevent a double redirect.