iss-api-gateway

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.

How to run Application

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

How to run the Unit Test

mvn -B clean verify

Deploy solution in minikube

Prerequisites

• Minikube cluster with kubectl installed and configured to use your cluster

1. Run minikube

minikube start --memory 8192

2. Create a ClusterRoleBinding for default namespace

kubectl create clusterrolebinding admin --clusterrole=cluster-admin --serviceaccount=default:default

3. Create a config map of Postgres

kubectl apply -f k8s/postgres/postgres-config.yaml

4. Deploy Postgres with a persistent volume claim

kubectl apply -f k8s/postgres/volume.yaml
kubectl apply -f k8s/postgres/postgres.yaml

5. Create a config map and secret of Mongodb

kubectl apply -f k8s/mongodb/mongodb-config.yaml
kubectl apply -f k8s/mongodb/mongodb-secret.yaml

6. Deploy Mongodb with a persistent volume claim

kubectl apply -f k8s/mongodb/volume.yaml
kubectl apply -f k8s/mongodb/mongodb.yaml

7. Create a config map of Kafka service

kubectl apply -f k8s/kafka/kafka-config.yaml

8. 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

9. Deploy Pricing service

kubectl apply -f k8s/iss-pricing-service-deployment.yaml

10. Deploy Product service

kubectl apply -f k8s/iss-product-service-deployment.yaml

11. Deploy Policy service

kubectl apply -f k8s/iss-policy-service-deployment.yaml

12. Deploy Policy search service

kubectl apply -f k8s/iss-policy-search-service-deployment.yaml

13. Deploy Payment service

kubectl apply -f k8s/iss-payment-service-deployment.yaml

14. Deploy Api gateway service

kubectl apply -f k8s/iss-api-gateway-deployment.yaml

15. Active ingress controller plugin

minikube addons enable ingress

16. Deploy ingress

kubectl apply -f k8s/ingress.yaml

17. Define mastercloudapps.com local DNS

export MINIKUBE_IP=$(minikube ip)
echo $MINIKUBE_IP mastercloudapps.com | sudo tee --append /etc/hosts >/dev/null

18. Check status pods and services with kubectl get pods,services

kubectl get pods,services

19. run dashboard and check status services in dashboard

minikube dashboard

20. an example of endpoint execution

21. 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

22. Stop minikube

minikube stop