enter image description hereI have a linux vm with k3s installed, and installed a Nginx-Ingress controller. I’m facing an issue while setting up the Nginx Ingress controller in my Kubernetes cluster. My goal is to setup https in the frontend, but I keep encountering a persistent 502 Bad Gateway error when accessing my application via the Ingress URL (app.192.168.[something].nip.io).

The error logs of the Ingress-NginX shows:

connect() failed (111: Connection refused) while conencting to upstream, client: 192.168.223.229, server: app.192.168.[something].nip.io, request:
"GET / HTTP/ 2.0", upstream:  "http://10.43.141.56:3000/", host: "app.192.168.[something].nip.io"

The frontend runs, the pod is up, I’m not sure where to go from here.

The Ingress resource:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress
  annotations:
    nginx.ingress.kubernetes.io/service-upstream: "true"
spec:
  ingressClassName: nginx
  tls:
  - secretName: dailygrind-tls
    hosts:
    - app.192.168.[something].nip.io
  rules:
  - host: app.192.168.[something].nip.io
    http:
      paths:
      - pathType: Prefix
        path: "/"
        backend:
          service:
            name: frontend
            port:
              number: 3000