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

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.

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

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

Time to apply our Kubernetes yaml files.

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

> 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.

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.

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.

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