Http error 400 The plain HTTP request was sent to HTTPS port

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1

Hello,

I have two services in my kubernetes cluster (based on microk8s)

reachable on:

search.example.com and
api.example.com

Now it is the case that the access from the api.example.com pod to search.example.com pod throws an error - the error comes from niginx

The service pods all run on http and 80 and TCP.

How can I solve the problem with a clean port forwarding via ingress controller?

See my example configuration:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: behuf-ingress
  namespace: behuf-example
  annotations:
    nginx.ingress.kubernetes.io/proxy-body-size: "600m"
    nginx.org/client-max-body-size: "600m"
    nginx.ingress.kubernetes.io/force-ssl-redirect: "true"
    nginx.ingress.kubernetes.io/backend-protocol: "HTTP"
    cert-manager.io/cluster-issuer: "letsencrypt-prod"
spec:
  tls:
  - hosts:
    - api.example.com
    - search.example.com
    secretName: tls-secret
  rules:
  - host: api.example.com
    http:
      paths:
      - pathType: Prefix
        path: "/"
        backend:
          service:
            name: example-erp-service
            port:
              number: 80
  - host: search.example.com
    http:
      paths:
      - pathType: Prefix
        path: "/"
        backend:
          service:
            name: example-search-service
            port:
              number: 80