ingress external ip

in kubernetes our ingress is looking at service and it looks at endpoint

technically we can craete endpoint manualy by defining target ip address

and if there is connectivity between we can accomplish something like that

by applying

---
# Note: we are creating endpoint manualy, usualy it is done by defauly by kubernetes, whenever we create service
apiVersion: v1
kind: Endpoints
metadata:
  name: my-awesome-app
subsets:
  - addresses:
      - ip: 10.53.10.3 # ip address accessible from kuberenetes
    ports:
      - port: 80
---
# Note: we are not defining any selectors for pods
apiVersion: v1
kind: Service
metadata:
  name: my-awesome-app
spec:
  ports:
    - protocol: TCP
      port: 80
# Note: alternative approach with dns cname instead of ip address
# ---
# apiVersion: v1
# kind: Service
# metadata:
#   name: my-awesome-app
# spec:
#   type: ExternalName
#   externalName: my-awesome-app.rabota.ua
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: my-awesome-app
spec:
  ingressClassName: external
  rules:
  - host: my-awesome-app.mac-blog.org.ua
    http:
      paths:
      - backend:
          service:
            name: my-awesome-app
            port:
              number: 80
        path: /
        pathType: ImplementationSpecific

note that we can have two options - by defining ip addresses or dns names

and to check if thats working we may do something like

kubectl exec some-pod-in-kube-xxxx -- curl -s --resolve my-awesome-app.mac-blog.org.ua:80:20.12.178.67 http://my-awesome-app.mac-blog.org.ua/login.aspx
curl -s --resolve my-awesome-app.mac-blog.org.ua:80:20.12.178.67 http://my-awesome-app.mac-blog.org.ua/login.aspx