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.
Successfully complete this lab by achieving the following learning objectives:
- Create a deployment for the store-products service with four replicas.
- Log in to the Kube master node.
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.
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
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
kubectl execto query the store-products service from the busybox testing pod.
kubectl exec busybox -- curl -s store-products