How do I make an ingress forward to an ssl port(443) if https traffic

Question

How does an ingress forward https traffic to port 443 of the service(eventually to 8443 on my container)? Do I have to make any changes to my ingress or is this done automatically.

On GCP, I have a layer 4 balancer -> nginx-ingress controller -> ingress

My ingress is:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress-keycloak
  annotations:
    kubernetes.io/ingress.class: "nginx"
    certmanager.k8s.io/issuer: "letsencrypt-prod"
    certmanager.k8s.io/acme-challenge-type: http01


spec:
  tls:
  - hosts:
    - mysite.com
    secretName: staging-iam-tls
  rules:
  - host: mysite.com
    http:
      paths:
      - path: /auth
        backend:
          serviceName: keycloak-http
          servicePort: 80

I searched online but I don't see explicit examples of hitting 443. It's always 80(or 8080)

My service keycloak-http is(elided and my container is actually listening at 8443)

apiVersion: v1
kind: Service
metadata:
  creationTimestamp: 2019-05-15T12:45:58Z
  labels:
    app: keycloak
    chart: keycloak-4.12.0
    heritage: Tiller
    release: keycloak
  name: keycloak-http
  namespace: default
 ..
spec:
  clusterIP: ..
  externalTrafficPolicy: Cluster
  ports:
  - name: http
    port: 80
    protocol: TCP
    targetPort: http
  - name: https
    port: 443
    protocol: TCP
    targetPort: 8443
  selector:
    app: keycloak
    release: keycloak
  sessionAffinity: None
  type: NodePort
status:
  loadBalancer: {}

Answer 1

Try this:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress-keycloak
  annotations:
    kubernetes.io/ingress.class: "nginx"
    nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"
    certmanager.k8s.io/issuer: "letsencrypt-prod"
    certmanager.k8s.io/acme-challenge-type: http01
spec:
  tls:
  - hosts:
    - mysite.com
    secretName: staging-iam-tls
  rules:
  - host: mysite.com
    http:
      paths:
      - path: /auth
        backend:
          serviceName: keycloak-http
          servicePort: 443