Install bitnami/nginx

Installing the Bitnami standalone nginx web server Chart involves us using the helm install command.

A Helm Chart can be installed multiple times inside a Kubernetes cluster. This is because each installation of a Chart can be customized to suit a different purpose.

For this reason, you must supply a unique name for the installation, or ask Helm to generate a name for you.

Challenge:

How can you use Helm to deploy the bitnami/nginx chart?

HINT: Use the helm utility to install the bitnami/nginx chart and specify the name mywebserver for the Kubernetes deployment. Consult the helm install documentation or run the helm install --help command to figure out the syntax.

Expand here to see the solution

Once you run this command, the output will contain the information about the deployment status, revision, namespace, etc, similar to:


NAME: mywebserver
LAST DEPLOYED: Tue Feb 18 22:02:13 2020
NAMESPACE: default
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
Get the NGINX URL:

  NOTE: It may take a few minutes for the LoadBalancer IP to be available.
        Watch the status with: 'kubectl get svc --namespace default -w mywebserver-nginx'

  export SERVICE_IP=$(kubectl get svc --namespace default mywebserver-nginx --template "{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}")
  echo "NGINX URL: http://$SERVICE_IP/"

In order to review the underlying Kubernetes services, pods and deployments, run:

kubectl get svc,po,deploy

In the following kubectl command examples, it may take a minute or two for each of these objects’ DESIRED and CURRENT values to match; if they don’t match on the first try, wait a few seconds, and run the command again to check the status.

The first object shown in this output is a Deployment. A Deployment object manages rollouts (and rollbacks) of different versions of an application.

You can inspect this Deployment object in more detail by running the following command:

kubectl describe deployment mywebserver

The next object shown created by the Chart is a Pod. A Pod is a group of one or more containers.

To verify the Pod object was successfully deployed, we can run the following command:

kubectl get pods -l app.kubernetes.io/name=nginx

And you should see output similar to:


NAME                                 READY     STATUS    RESTARTS   AGE
mywebserver-nginx-85985c8466-tczst   1/1       Running   0          10s

The third object that this Chart creates for us is a Service. A Service enables us to contact this nginx web server from the Internet, via an Elastic Load Balancer (ELB).

To get the complete URL of this Service, run:

kubectl get service mywebserver-nginx -o wide

That should output something similar to:


NAME                TYPE           CLUSTER-IP      EXTERNAL-IP
mywebserver-nginx   LoadBalancer   10.100.223.99   abc123.amazonaws.com

Copy the value for EXTERNAL-IP, open a new tab in your web browser, and paste it in.

It may take a couple minutes for the ELB and its associated DNS name to become available; if you get an error, wait one minute, and hit reload.

When the Service does come online, you should see a welcome message similar to:

Helm Logo

Congratulations! You’ve now successfully deployed the nginx standalone web server to your EKS cluster!