online banking example

Example project showcasing:

• SpringBoot microservices with reactive streams
• Kafka for messaging between microservices
• OAuth2 security
• Angular 5 front end
• All deployed in local kubernetes cluster (minikube)
• Finally Instructions on how to deploy on AWS

To use local docker daemon within minikube, eval $(minikube docker-env)

To run kafka locally and test producer and consumer on console:

• Run bin/zookeeper-server-start.sh config/zookeeper.properties bin/kafka-server-start.sh config/server.properties bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic test --from-beginning bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic baeldung --from-beginning

The application comprises of following microservices:

1. CardsService
2. CashService
3. MortgageService
4. CustomerService

Cash Service

To build docker image of cashservice docker build -t achalise/cash-service:0.0.1 .

for gateway service using the dockerfile-maven-plugin, ./mvnw dockerfile:build

Create a spring boot starter project with start.spring.io selecting reactive web and reactive MongoDB options.

Order to run:

1. zookeeper-services.yaml (kubectl create -f kafka/zookeeper-services.yaml)
2. zookeeper-cluster.yaml
3. kafka-service.yaml
4. kafka-cluster.yaml
5. mongo-cash.yaml
6. cash-service.yaml
7. gateway-service.yaml

uninstall all:

kubectl delete -f gateway/k8s/gateway-service.yaml

kubectl delete -f cash-service/k8s/cash-service.yaml kubectl delete -f cash-service/k8s/mongo-cash.yaml

kubectl delete -f card-service/k8s/card-service.yaml kubectl delete -f card-service/k8s/mongo-card.yaml

kubectl delete -f kafka/kafka-cluster.yaml kubectl delete -f kafka/kafka-service.yaml

kubectl delete -f kafka/zookeeper-cluster.yaml kubectl delete -f kafka/zookeeper-services.yaml

install all:

eval $(minikube docker-env) kubectl create -f kafka/namespace-kafka.yaml kubectl config set-context kafka --namespace=kafka-cluster --user=cluster-admin kubectl config use-context kafka

kubectl create -f kafka/zookeeper-services.yaml kubectl create -f kafka/zookeeper-cluster.yaml

kubectl create -f kafka/kafka-service.yaml kubectl create -f kafka/kafka-cluster.yaml

kubectl create -f cash-service/k8s/mongo-cash.yaml kubectl create -f cash-service/k8s/cash-service.yaml

kubectl create -f card-service/k8s/mongo-card.yaml kubectl create -f card-service/k8s/card-service.yaml

kubectl create -f gateway/k8s/gateway-service.yaml

***** during minikube upgrade if there are issues, try

• removing .minikube, .kube
• upgrading virtual box - if not current
• upgrading docker - if not current

For the front end

• Install Angular cli globally npm install -g @angular/cli
• When there are multiple modules in the project, and using ng generate, specify module like this: ng generate component payment/from-account --module=app.module