We decided to implement it in an extremely simplified version of an insurance sales system to test the following aspects of microservice development:
- Project creation and development
- Access of both relational and NoSQL databases
- Blocking and non-blocking operations implementation
- Microservice to microservice communication (synchronous and asynchronous)
- Service discovery
- Running background jobs
The complexity of “business microservices” was hidden by using a Gateway pattern. This component was responsible for the proper redirection of requests to the appropriate services based on the configuration. The frontend application could only communicate with this component. This component showed the usage of non-blocking http declarative clients.
Running application from command line using Docker, this is the cleanest way. In order for this approach to work, of course, you need to have Docker installed in your local environment.
- From the root directory you can run the following command:
docker-compose -f docker/docker-compose.yml up --build - Application will be running on: http://localhost:8084
- To stop it you can open other terminal in the same directory, and then run the following command:
docker-compose -f docker/docker-compose.yml down
mvn -B clean verify
- Minikube cluster with kubectl installed and configured to use your cluster
- Run minikube
minikube start --memory 8192
- Create a ClusterRoleBinding for default namespace
kubectl create clusterrolebinding admin --clusterrole=cluster-admin --serviceaccount=default:default
- Create a config map of Postgres
kubectl apply -f k8s/postgres/postgres-config.yaml
- Deploy Postgres with a persistent volume claim
kubectl apply -f k8s/postgres/volume.yaml
kubectl apply -f k8s/postgres/postgres.yaml
- Create a config map and secret of Mongodb
kubectl apply -f k8s/mongodb/mongodb-config.yaml
kubectl apply -f k8s/mongodb/mongodb-secret.yaml
- Deploy Mongodb with a persistent volume claim
kubectl apply -f k8s/mongodb/volume.yaml
kubectl apply -f k8s/mongodb/mongodb.yaml
- Create a config map of Kafka service
kubectl apply -f k8s/kafka/kafka-config.yaml
- Deploy Zookeeper and Kafka Cluster
kubectl apply -f k8s/kafka/zookeeper-services.yaml
kubectl apply -f k8s/kafka/zookeeper-cluster.yaml
kubectl apply -f k8s/kafka/kafka-service.yaml
kubectl apply -f k8s/kafka/kafka-cluster.yaml
- Deploy Pricing service
kubectl apply -f k8s/iss-pricing-service-deployment.yaml
- Deploy Product service
kubectl apply -f k8s/iss-product-service-deployment.yaml
- Deploy Policy service
kubectl apply -f k8s/iss-policy-service-deployment.yaml
- Deploy Policy search service
kubectl apply -f k8s/iss-policy-search-service-deployment.yaml
- Deploy Payment service
kubectl apply -f k8s/iss-payment-service-deployment.yaml
- Deploy Api gateway service
kubectl apply -f k8s/iss-api-gateway-deployment.yaml
- Active ingress controller plugin
minikube addons enable ingress
- Deploy ingress
kubectl apply -f k8s/ingress.yaml
- Define mastercloudapps.com local DNS
export MINIKUBE_IP=$(minikube ip)
echo $MINIKUBE_IP mastercloudapps.com | sudo tee --append /etc/hosts >/dev/null
- Check status pods and services with kubectl get pods,services
kubectl get pods,services
- run dashboard and check status services in dashboard
minikube dashboard
- an example of endpoint execution
- Deleting all the Resources
kubectl delete -f k8s/ingress.yaml
kubectl delete -f k8s/iss-api-gateway-deployment.yaml
kubectl delete -f k8s/iss-payment-service-deployment.yaml
kubectl delete -f k8s/iss-policy-search-service-deployment.yaml
kubectl delete -f k8s/iss-policy-service-deployment.yaml
kubectl delete -f k8s/iss-product-service-deployment.yaml
kubectl delete -f k8s/iss-pricing-service-deployment.yaml
kubectl delete -f k8s/kafka/kafka-config.yaml
kubectl delete -f k8s/kafka/kafka-cluster.yaml
kubectl delete -f k8s/kafka/kafka-service.yaml
kubectl delete -f k8s/kafka/zookeeper-cluster.yaml
kubectl delete -f k8s/kafka/zookeeper-services.yaml
kubectl delete -f k8s/mongodb/mongodb.yaml
kubectl delete -f k8s/mongodb/volume.yaml
kubectl delete -f k8s/mongodb/mongodb-config.yaml
kubectl delete -f k8s/mongodb/mongodb-secret.yaml
kubectl delete -f k8s/postgres/postgres.yaml
kubectl delete -f k8s/postgres/volume.yaml
kubectl delete -f k8s/postgres/postgres-config.yaml
- Stop minikube
minikube stop
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