Force HTTPS with Traefik - kubernetes

Question

I am using traefik as ingress controller in a K8s cluster. I'd like to enforce all traffic via HTTPS.
It is a bit confusing the documentation because apparently there are different ways to do the same thing? Namely, I'd like to know what is the difference between these 2:
https://docs.traefik.io/user-guide/examples/#http-redirect-on-http
https://docs.traefik.io/configuration/backends/kubernetes/#general-annotations
If I use K8s is enough to use general annotations or I still have to edit the TOML file?
I have tried to use traefik.ingress.kubernetes.io/redirect-entry-point: https but doesn't find the service so I guess something is missing in my config.
If I remove the above line then everything works but HTTP -> HTTPS is, of course, not working. When I place the line back it returns a 404.
FWIW, the ingress definition is as follows (with traefik redirecting to 404):
- apiVersion: extensions/v1beta1
kind: Ingress
metadata:
generation: 1
name: rekover-ingress
namespace: prod
annotations:
kubernetes.io/ingress.class: traefik
traefik.ingress.kubernetes.io/frontend-entry-points: http, https
traefik.ingress.kubernetes.io/redirect-entry-point: https
spec:
rules:
- host: www.xxx.com
http:
paths:
- backend:
serviceName: xxx-frontend
servicePort: 80
I have tried the very same configuration with nginx and changing to respective metadata and worked!. Below metadata used for nginx and Ingress:
nginx.ingress.kubernetes.io/force-ssl-redirect: "true"
kubernetes.io/ingress.class: nginx
For completeness, I copy-paste the service definition for both nginx and traefik. First one works as expected:
kind: Service
apiVersion: v1
metadata:
name: ingress-nginx
namespace: ingress-nginx
labels:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
annotations:
service.beta.kubernetes.io/aws-load-balancer-backend-protocol: http
service.beta.kubernetes.io/aws-load-balancer-ssl-cert: arn:aws:acm:xxxx
service.beta.kubernetes.io/aws-load-balancer-ssl-ports: https
spec:
selector:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
ports:
- name: http
port: 80
targetPort: http
- name: https
port: 443
targetPort: http
type: LoadBalancer
</code>
<code>
kind: Service
apiVersion: v1
metadata:
name: traefik-ingress-service
namespace: ingress-prod
annotations:
service.beta.kubernetes.io/aws-load-balancer-backend-protocol: http
service.beta.kubernetes.io/aws-load-balancer-ssl-cert: arn:aws:acm:xxxx
service.beta.kubernetes.io/aws-load-balancer-ssl-ports: https
spec:
selector:
k8s-app: traefik-ingress-lb
ports:
- name: http
port: 80
targetPort: http
protocol: TCP
- name: https
port: 443
targetPort: http
protocol: TCP
type: LoadBalancer

Answer 1

The first one is the toml Traefik configuration file, that can be modified in Kubernetes through a ConfigMap or in the Traefik container itself, or in the Traefik container command line (depending on how you deployed the Traefik Ingress Controller).
The second is what is mostly used to manage the configuration in the Traefik Ingress Controller through the Ingress Kubernetes resource.
You didn't post your Ingress definition but most likely it doesn't have a way to handle HTTPS and that's why when you add the annotation it sends traffic to port 443 and Traefik returns a 404.
To handle HTTPS/TLS you would need to enable it first (Create a K8s cert secret, configure TLS in the Ingress, etc). Or this is another example on how to enable it using a ConfigMap.

Answer 2

I give you the solution as valid because you provided a correct answer to the original question though the original question was badly formulated, my bad.
I found a related question which answers my question and worked like a charm:
Unable to redirect from http to https behind AWS load balancer
What frustates me is that, for instance, with nginx is just enough to use metadata annotations to force redirect to ssl whereas with traefik you have to edit the TOML file (or at least I didnt find the equivalent annotation for the problem).