ingress-nginx-helm/docs/examples/customization/custom-errors/custom-default-backend.yaml

---
apiVersion: v1
kind: Service
metadata:
  name: nginx-errors
  labels:
    app.kubernetes.io/name: nginx-errors
    app.kubernetes.io/part-of: ingress-nginx
spec:
  selector:
    app.kubernetes.io/name: nginx-errors
    app.kubernetes.io/part-of: ingress-nginx
  ports:
  - port: 80
    targetPort: 8080
    name: http
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-errors
  labels:
    app.kubernetes.io/name: nginx-errors
    app.kubernetes.io/part-of: ingress-nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: nginx-errors
      app.kubernetes.io/part-of: ingress-nginx
  template:
    metadata:
      labels:
        app.kubernetes.io/name: nginx-errors
        app.kubernetes.io/part-of: ingress-nginx
    spec:
      containers:
      - name: nginx-error-server
        image: registry.k8s.io/ingress-nginx/custom-error-pages:v1.1.0@sha256:a2342e403fc3c19f81f5625e1b93daa0f8fb3dfaa1df4905f85e32d2d98a5e96
        ports:
        - containerPort: 8080
        # Setting the environment variable DEBUG we can see the headers sent 
        # by the ingress controller to the backend in the client response.
        # env:
        # - name: DEBUG
        #   value: "true"

        # Mounting custom error page from configMap
        # volumeMounts:
        # - name: custom_error_pages
        #   mountPath: /www

      # Mounting custom error page from configMap
      # volumes:
      # - name: custom_error_pages
      #   configMap:
      #     name: custom_error_pages
      #     items:
      #     - key: "404"
      #       path: "404.html"
      #     - key: "503"
      #       path: "503.html"