Enterprise Java

Apache Ignite and Spring on your Kubernetes Cluster Part 3: Testing the application

On the previous blog we created our Kubernetes deployment files for our Ignite application. On this blog we shall deploy our Ignite application on Kubernetes. I will use minikube on this.

Let’s build first

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mvn clean install

I shall create a simple docker image, thus a Dockerfile is neeeded.
Let’s add a Dockerfile to the root of our project.

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FROM adoptopenjdk/openjdk11
 
COPY target/job-api-ignite-0.0.1-SNAPSHOT.jar app.jar
 
ENTRYPOINT ["java","-jar","app.jar"]

Now we want to deploy this to our local Κubernetes. Follow this guide on how to use local images on Kubernetes.

Then let’s build our app

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docker build -f Dockerfile -t job-api:1.0 .

Time to apply our Kubernetes yaml files.

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kubectl apply -f job-cache-rbac.yaml
kubectl apply -f job-api-deployment.yaml
kubectl apply -f job-api-service.yaml

Give it some time and check your pods

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> kubectl get pods
NAME                                  READY   STATUS    RESTARTS   AGE
job-api-deployment-86f54c9d75-dpnsc   1/1     Running   0          11m
job-api-deployment-86f54c9d75-xj267   1/1     Running   0          11m

Let’s issue a request through the first pod. This request will reach github and then shall cache the results in memory.

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kubectl exec -it job-api-deployment-86f54c9d75-dpnsc -- curl localhost:8080/jobs/github/1

Then we shall use the other endpoint in order to fetch data straight from ignite.

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kubectl exec -it job-api-deployment-86f54c9d75-xj267 -- curl localhost:8080/jobs/github/ignite/1

So we are successful, which means that our Ignite cluster is running in our Kubernetes workloads. The data are cached and shared between the nodes.

You can find the code on GitHub.

Published on Java Code Geeks with permission by Emmanouil Gkatziouras, partner at our JCG program. See the original article here: Apache Ignite and Spring on your Kubernetes Cluster Part 3: Testing the application

Opinions expressed by Java Code Geeks contributors are their own.

Emmanouil Gkatziouras

He is a versatile software engineer with experience in a wide variety of applications/services.He is enthusiastic about new projects, embracing new technologies, and getting to know people in the field of software.
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