Create an Ingress Controller on a Cluster

Prerequisites

• Configure Ingress Controller

• Create deployments

• Expose deployments

minikube addons enable ingress

kubectl create deployment web --image=gcr.io/google-samples/hello-app:1.0

kubectl expose deployment web --type=NodePort --port=8080

kubectl create deployment web2 --image=gcr.io/google-samples/hello-app:2.0

kubectl expose deployment web2 --port=8080 --type=NodePort

Accessing services with Ingress

Once we have the services to be routed by the ingress we define the file demo-ingress.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: example-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /$1
spec:
  rules:
    - host: hello-world.info
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: web
                port:
                  number: 8080
		  - path: /v2
            pathType: Prefix
            backend:
              service:
                name: web2
                port:
                  number: 8080
			

This file defines an Ingress with the path hello-world.info for the service web and hello-wold.info/v2 for the service web2

To test locally execute the following and copy the IP assigned to the Ingress we created

kubectl get ingress

Add the host and ip at the end of the file /etc/hosts

echo "192.168.59.114  hello-world.info" >> /etc/hosts

You can also just ssh into the cluster and test with curl

Reference Links

• https://kubernetes.io/docs/concepts/services-networking/ingress/