Kubernetes Ingress Controller GPC GKE can't reach the site

Question

Kubernetes Ingress Controller can't reach the site

Hi, this is the first time I am trying to deploy an application with kubernetes. The problem I am facing is I want to be able link subdomains with my svc, but when I try to navigate to the links I get

This site can’t be reached

I will explain the steps I made for these, probably I something is wrong or missing

1. I installed ingress-controller on google cloud platform

2. In GCP -> Networking Services -> Cloud DNS

   a. I pointed testcompany.com with google dns

   b. I created an A record pointing the public IP from the previous step "ingress-nginx-controller"

3. my svc manifest

   apiVersion: v1
   kind: Service
   metadata:
     namespace: staging
     name: testcompany-svc
     labels:
       app: testcompany-svc
   spec:
     type: NodePort
     ports:
       - name: test-http
         port: 80
         protocol: TCP
         targetPort: 3001
     selector:
       app: testcompany
   

4. my ingress manifest

   apiVersion: networking.k8s.io/v1beta1
   
     - host: api.testcompany.com
       http:
         paths:
         - backend:
             serviceName: testcompany-svc
             servicePort: test-http
   

Everything is green and it seems to be working, but when I try to reach the url I get the This site can’t be reached

---

Update 1

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  namespace: staging
  name: ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
  - host: front.stagingtestcompany.com
    http:
      paths:
      - backend:
          serviceName: testcompanyfront-svc
          servicePort: testcompanyfront-http

  - host: api.stagingtestcompanysrl.com
    http:
      paths:
      - backend:
          serviceName: testcompanynodeapi-svc
          servicePort: testcompanyapi-http

Answer 1

You should check this, in order:

1. your Service, Pod, Ingress are in the same namespace: kubectl get all -n staging
2. your Pod is listening on port 3001: run it locally if you can, or use kubectl port-forward pods/[pod-name] -n staging 3001:3001 and try it locally with http://localhost:3001/...
3. your Service is reaching your Pod correctly: use kubectl port-forward service/testcompany-svc -n staging 3001:3001 and try it locally with http://localhost:3001/...
4. check any other Ingress spec rules before the one you posted
5. check for firewall rules in your VPC network, they should allow traffic from Google LBs