JHipster & Kubernetes microservice demo

Generate all the code with JHipster

Run: jhipster import-jdl jhipster-istio-demo.jdl

Build docker images

In the accountancy and store directories, package the apps as jars and build the docker image (skip the tests if you don't want to die from boredom):

./mvnw package -DskipTests -Pprod jib:dockerBuild

Local development

Start all the apps locally with:

• docker-compose -f store/src/main/docker/jhipster-registry.yml up -d
• ./mvnw and yarn start for the gateway
• ./mvnw for the microservices
• docker-compose -f accountancy/src/main/docker/mongodb.yml up -d (required for MongoDB)

Deployment to a single host with docker-compose

For convenience, I have already pushed the images to the docker hub (pbesson/store, pbesson/accountancy and pbesson/crm).

• cd docker && docker-compose up -d

Deployment to a Kubernetes cluster

If you don't have a kubernetes cluster, the easiest and fastest way to test is by using Kind (Kubernetes IN Docker). Seehttps://kind.sigs.k8s.io/docs/user/quick-start/

Simply run : cd kubernetes && ./kubectl-apply.sh to create the resources in the jhipster namespace of your kubernetes cluster. Then:

• Switch to the jhipster namespace: kubectl config set-context $(kubectl config current-context) --namespace=jhipster
• See the available Kubernetes services: kubectl get svc
• Scale the number of replica of the crm service by editing the replica yaml field and reapplying the conf.

Observability with Istio

Open a port-forward to Kiali:

kubectl -n istio-system port-forward $(kubectl -n istio-system get pods -lapp=kiali -o=jsonpath="{.items[0].metadata.name}") 20001

Open a port-forward to Zipkin:

kubectl -n istio-system port-forward $(kubectl -n istio-system get pod -l app=zipkin -o jsonpath='{.items[0].metadata.name}') 9411

Open a port-forward to Grafana:

kubectl -n istio-system port-forward $(kubectl -n istio-system get pod -l app=grafana -o jsonpath='{.items[0].metadata.name}') 3000

• Kiali : http://localhost:20001/kiali
• Zipkin : http://localhost:9411
• Grafana : http://localhost:3000