Need help on configuring Nginx ingress controller for hcloud-cloud-controller-manager

Question

I'm trying to follow this suggestion to use Hetzner load balancer as a Nginx ingress controller.

helm install ingress-nginx with these configurations:

controller:
  config:
    use-proxy-protocol: "true"
  replicaCount: 3
  service:
    type: LoadBalancer
    annotations:
      load-balancer.hetzner.cloud/name: nginx-controller-new
      load-balancer.hetzner.cloud/location: hel1
      load-balancer.hetzner.cloud/use-private-ip: true
      load-balancer.hetzner.cloud/algorithm-type: least_connections
      load-balancer.hetzner.cloud/uses-proxyprotocol: true
      load-balancer.hetzner.cloud/hostname: somehost.com

Deployments:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: echo1
spec:
  selector:
    matchLabels:
      app: echo1
  replicas: 3
  template:
    metadata:
      labels:
        app: echo1
    spec:
      containers:
        - name: echo1
          image: hashicorp/http-echo
          args:
            - "-text=echo1"
          ports:
            - containerPort: 5678
---
apiVersion: v1
kind: Service
metadata:
  name: echo-service
spec:
  selector:
    app: echo1
  ports:
    - name: http
      protocol: TCP
      port: 80
      targetPort: 5678
  ipFamilyPolicy: PreferDualStack

---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: nginx
spec:
  ingressClassName: nginx
  rules:
    - http:
        paths:
          - pathType: Prefix
            path: "/"
            backend:
              service:
                name: echo-service
                port:
                  number: 80
      host: somehost.com

After installation, a Hetzner load balancer is successfully provisioned, however, it isn't able to detect the services:

I'm at a loss here. How can I connect the echo1 app to the ingress-nginx-controller service? I check out all of the available helm values but I cannot find something like service.selector to target echo1's service and make it publicly available. Can someone help me? Are there any alternatives?

Answer 1

I am not the Kubernetes master (more a noob) but I got it working with a L4-loadbalancer.

An annotation has to be set to your Ingress:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  annotations:
    kubernetes.io/ingress.class: nginx

And to use it without nginx-ingress, that worked for me (not tested with your labels)

apiVersion: "apps/v1"
kind: "Deployment"
metadata:
  name: "nginx-hello-world"
  labels:
    app: "hello-world"
spec:
  selector:
    matchLabels:
      app: "hello-world"
  strategy:
    type: "Recreate"
  template:
    metadata:
      labels:
        app: "hello-world"
    spec:
      containers:
        - image: "rancher/hello-world"
          name: "nginx-hello-world"
          imagePullPolicy: "Always"
          ports:
            - containerPort: 80
              name: "http"

Service for HTTP (to test your deployment)

---
apiVersion: "v1"
kind: Service
metadata:
  name: "nginx-hello-world"
  labels:
    app: "hello-world"
  annotations:
    load-balancer.hetzner.cloud/name: lb-development
    load-balancer.hetzner.cloud/hostname: somehost.com
    load-balancer.hetzner.cloud/protocol:   http
    load-balancer.hetzner.cloud/health-check-port: 10254
spec:
  type: LoadBalancer
  selector:
    app: "hello-world"
  ports:
    - name: "http"
      port: 80
      targetPort: 80

for SSL

apiVersion: v1
kind: Service
metadata:
  name: nginx-hello-world
  labels:
    app: hello-world
  annotations:
    load-balancer.hetzner.cloud/hostname: somehost.com
    load-balancer.hetzner.cloud/http-certificates: managed-certificate-1-wildcard-somehost.com
    load-balancer.hetzner.cloud/name: lb-development
    load-balancer.hetzner.cloud/protocol: https
spec: 
  ports:
  - name: https
    nodePort: 32725
    port: 443
    protocol: TCP
    targetPort: 80
  selector:
    app: hello-world
  type: LoadBalancer