Deploying a Simple Service to Kubernetes

1 hour
  • 2 Learning Objectives

About this Hands-on Lab

Deployments and services are at the core of what makes Kubernetes a great way to manage complex application infrastructures. In this hands-on lab, you will have an opportunity to get hands-on with a Kubernetes cluster and build a simple deployment, coupled with a service providing access to it. You will create a deployment and a service which can be accessed by other pods in the cluster.

Learning Objectives

Successfully complete this lab by achieving the following learning objectives:

Create a deployment for the store-products service with four replicas.
  1. Log in to the Kube master node.
  2. Create the deployment with four replicas:

    cat << EOF | kubectl apply -f -
    apiVersion: apps/v1
    kind: Deployment
    metadata:
     name: store-products
     labels:
       app: store-products
    spec:
     replicas: 4
     selector:
       matchLabels:
         app: store-products
     template:
       metadata:
         labels:
           app: store-products
       spec:
         containers:
         - name: store-products
           image: linuxacademycontent/store-products:1.0.0
           ports:
           - containerPort: 80
    EOF
Create a store-products service and verify that you can access it from the busybox testing pod.
  1. Create a service for the store-products pods:

    cat << EOF | kubectl apply -f -
    kind: Service
    apiVersion: v1
    metadata:
     name: store-products
    spec:
     selector:
       app: store-products
     ports:
     - protocol: TCP
       port: 80
       targetPort: 80
    EOF
  2. Make sure the service is up in the cluster:

    kubectl get svc store-products

    The output will look something like this:

    NAME             TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)   AGE
    store-products   ClusterIP   10.104.11.230   <none>        80/TCP    59s
  3. Use kubectl exec to query the store-products service from the busybox testing pod.

    kubectl exec busybox -- curl -s store-products

Additional Resources

Your team manages an online storefront. They want to have a simple service in their Kubernetes cluster that is able to provide a list of products. Other pieces of the application, running as other pods in the cluster, will use this service in the future. For now, all you need to do is deploy the service's pods to the cluster and create a Kubernetes service to provide access to those pods. The team estimates that you will need four replicas of the service pod for the time being. There is already a busybox testing pod in the cluster that you can use to test your new service once it is created.

There is a public Docker image for the store-products app called linuxacademycontent/store-products:1.0.0.

You will need to do the following:

  • Create a deployment for the store-products service with four replicas.
  • Create a store-products service and verify that you can access it from the busybox testing pod.

If you need additional guidance, click the icon next to each task below for more information on how to complete each task. You can also check out the solution video for a detailed walkthrough. Note: this lab does not require root login.

What are Hands-on Labs

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

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