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:

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
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

    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:

    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 adminstrator 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

Last modified August 03, 2021 at 2:33 PM PST : Revise task for practising NGINX Ingress controller (9d77a6bf2)