ingress_controller.txt

1. Create nginx controller

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v0.41.2/deploy/static/provider/baremetal/deploy.yaml

add hostNetwork: true in pod sepc

2.  Create Deployment1
kubectl create deployment web --image=gcr.io/google-samples/hello-app:1.0

Expose the Deployment:

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

Verify the Service is created and is available on a node port:

kubectl get service web
Output:

NAME      TYPE       CLUSTER-IP       EXTERNAL-IP   PORT(S)          AGE
web       NodePort   10.104.133.249   <none>        8080:31637/TCP   12m
Visit the service via NodePort:
Output:

http://172.17.0.15:31637

3. Create Ingress resource
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: example-ingress
spec:
  ingressClassName: nginx
  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
                  
  kubectl apply -f example-ingress.yaml
  
 Add the following line to the bottom of the /etc/hosts file.

172.17.0.15 hello-world.info
                  
Edit Ingress
Edit the existing example-ingress.yaml and add the following lines:

      - path: /v2
        pathType: Prefix
        backend:
          service:
            name: web2
            port:
              number: 8080
Apply the changes:

kubectl apply -f example-ingress.yaml

4.  Create a v2 Deployment using the following command:

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

deployment.apps/web2 created
Expose the Deployment:

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

5. Test Your Ingress
Access the 1st version of the Hello World app.

curl hello-world.info
Output:

Hello, world!
Version: 1.0.0
Hostname: web-55b8c6998d-8k564
Access the 2nd version of the Hello World app.

curl hello-world.info/v2
Output:

Hello, world!
Version: 2.0.0
Hostname: web2-75cd47646f-t8cjk

More info # https://kubernetes.io/docs/tasks/access-application-cluster/ingress-minikube/