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. It is recommended to run this tutorial on a cluster with at least two nodes that are not acting as control plane hosts. If you do not already have a cluster, you can create one by using minikube or you can use one of these Kubernetes playgrounds:

• Killercoda
• Play with Kubernetes

Your Kubernetes server must be at or later than version 1.19. To check the version, enter kubectl version. If you are using an older Kubernetes version, switch to the documentation for that version.

Create a Minikube cluster

Using Katacoda

Launch Terminal

Locally

If you already installed Minikube locally, run minikube start to create a cluster.

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

   • minikube v1.19 or later
   • minikube v1.18.1 or earlier

   kubectl get pods -n ingress-nginx
   

   Note: It can take up to a minute before you see these pods running OK.

   The output is similar to:

   NAME                                        READY   STATUS      RESTARTS    AGE
   ingress-nginx-admission-create-g9g49        0/1     Completed   0          11m
   ingress-nginx-admission-patch-rqp78         0/1     Completed   1          11m
   ingress-nginx-controller-59b45fb494-26npt   1/1     Running     0          11m
   

   kubectl get pods -n kube-system
   

   Note: It can take up to a minute before you see these pods running OK.

   The output is similar to:

   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
   

   Make sure that you see a Pod with a name that starts with nginx-ingress-controller-.

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
   

   The output should be:

   deployment.apps/web created
   

2. Expose the Deployment:

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

   The output should be:

   service/web exposed
   

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

   kubectl get service web
   

   The output is similar to:

   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
   

   The output is similar to:

   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.

   The output is similar to:

   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

The following manifest defines an Ingress that sends traffic to your Service via hello-world.info.

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

   service/networking/example-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

2. Create the Ingress object by running the following command:

   kubectl apply -f https://k8s.io/examples/service/networking/example-ingress.yaml
   

   The output should be:

   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.

   You should see an IPv4 address in the ADDRESS column; for example:

   NAME              CLASS    HOSTS              ADDRESS        PORTS   AGE
   example-ingress   <none>   hello-world.info   172.17.0.15    80      38s
   

4. Add the following line to the bottom of the /etc/hosts file on your computer (you will need administrator access):

   172.17.0.15 hello-world.info
   

   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.

   After you make this change, your web browser sends requests for hello-world.info URLs to Minikube.

5. Verify that the Ingress controller is directing traffic:

   curl hello-world.info
   

   You should see:

   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 a second Deployment

1. Create another Deployment using the following command:

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

   The output should be:

   deployment.apps/web2 created
   

2. Expose the second Deployment:

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

   The output should be:

   service/web2 exposed
   

Edit the existing Ingress

1. Edit the existing example-ingress.yaml manifest, and add the following lines at the end:

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

2. Apply the changes:

   kubectl apply -f example-ingress.yaml
   

   You should see:

   ingress.networking/example-ingress configured
   

Test your Ingress

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

   curl hello-world.info
   

   The output is similar to:

   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
   

   The output is similar to:

   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.

What's next

• Read more about Ingress
• Read more about Ingress Controllers
• Read more about Services