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Set up Ingress on Minikube with the NGINX Ingress Controller

An Ingress is an API object that defines rules which allow external access to services in a cluster. An Ingress controller fulfills the rules set in the Ingress.

This page shows you how to set up a simple Ingress which routes requests to Service web or web2 depending on the HTTP URI.

Before you begin

You need to have a Kubernetes cluster, and the kubectl command-line tool must be configured to communicate with your cluster. If you do not already have a cluster, you can create one by using Minikube, or you can use one of these Kubernetes playgrounds:

To check the version, enter kubectl version.

Create a Minikube cluster

  1. Click Launch Terminal

  1. (Optional) If you installed Minikube locally, run the following command:

    minikube start
    

Enable the Ingress controller

  1. To enable the NGINX Ingress controller, run the following command:

    minikube addons enable ingress
    
  2. Verify that the NGINX Ingress controller is running

    kubectl get pods -n kube-system
    
Note: This can take up to a minute.
Output:

```shell
NAME                                        READY     STATUS    RESTARTS   AGE
default-http-backend-59868b7dd6-xb8tq       1/1       Running   0          1m
kube-addon-manager-minikube                 1/1       Running   0          3m
kube-dns-6dcb57bcc8-n4xd4                   3/3       Running   0          2m
kubernetes-dashboard-5498ccf677-b8p5h       1/1       Running   0          2m
nginx-ingress-controller-5984b97644-rnkrg   1/1       Running   0          1m
storage-provisioner                         1/1       Running   0          2m
```

Deploy a hello, world app

  1. Create a Deployment using the following command:

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

    Output:

    deployment.apps/web created
    
  2. Expose the Deployment:

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

    Output:

    service/web exposed
    
  3. 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
    
  4. Visit the service via NodePort:

    minikube service web --url
    

    Output:

    http://172.17.0.15:31637
    
Note: Katacoda environment only: at the top of the terminal panel, click the plus sign, and then click Select port to view on Host 1. Enter the NodePort, in this case 31637, and then click Display Port.
Output:

```shell
Hello, world!
Version: 1.0.0
Hostname: web-55b8c6998d-8k564
```

You can now access the sample app via the Minikube IP address and NodePort. The next step lets you access 
the app using the Ingress resource.

Create an Ingress resource

The following file is an Ingress resource that sends traffic to your Service via hello-world.info.

  1. Create example-ingress.yaml from the following file:

     apiVersion: networking.k8s.io/v1beta1 # for versions before 1.14 use extensions/v1beta1
     kind: Ingress
     metadata:
       name: example-ingress
       annotations:
         nginx.ingress.kubernetes.io/rewrite-target: /$1
     spec:
       rules:
       - host: hello-world.info
         http:
           paths:
           - path: /
             backend:
               serviceName: web
               servicePort: 8080
    
  2. Create the Ingress resource by running the following command:

    kubectl apply -f example-ingress.yaml
    

    Output:

    ingress.networking.k8s.io/example-ingress created
    
  3. Verify the IP address is set:

    kubectl get ingress
    
Note: This can take a couple of minutes.
```shell
NAME              HOSTS              ADDRESS       PORTS     AGE
example-ingress   hello-world.info   172.17.0.15   80        38s
```
  1. Add the following line to the bottom of the /etc/hosts file.

Note: If you are running Minikube locally, use minikube ip to get the external IP. The IP address displayed within the ingress list will be the internal IP.
```
172.17.0.15 hello-world.info
```

This sends requests from hello-world.info to Minikube.
  1. Verify that the Ingress controller is directing traffic:

    curl hello-world.info
    

    Output:

    Hello, world!
    Version: 1.0.0
    Hostname: web-55b8c6998d-8k564
    
Note: If you are running Minikube locally, you can visit hello-world.info from your browser.

Create Second Deployment

  1. 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
    
  2. Expose the Deployment:

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

    Output:

    service/web2 exposed
    

Edit Ingress

  1. Edit the existing example-ingress.yaml and add the following lines:

          - path: /v2
            backend:
              serviceName: web2
              servicePort: 8080
    
  2. Apply the changes:

    kubectl apply -f example-ingress.yaml
    

    Output:

    ingress.extensions/example-ingress configured
    

Test Your Ingress

  1. Access the 1st version of the Hello World app.

    curl hello-world.info
    

    Output:

    Hello, world!
    Version: 1.0.0
    Hostname: web-55b8c6998d-8k564
    
  2. 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
    
Note: If you are running Minikube locally, you can visit hello-world.info and hello-world.info/v2 from your browser.

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