deepanshumehtaa / bank-cloud-serivce

Illustrating Spring Boot with Dockers & MiniKube

Spring Boot Micro Services

Spring Boot with Cloud, Dockers and Kubernetes

Login to https://labs.play-with-docker.com/ with your docker-hub id.

Start a Linux instance

Clone the code repo on to the instance

git clone https://github.com/glarimy/bank-cloud-serivce.git

Build the docker image

docker build -t glarimy/bank .

Login to docker-hub and export the image

docker login
docker push glarimy/bank

Get the images from docker-hub

docker pull mysql
docker pull glarimy/bank

Create a network

docker network create glarimy
docker network ls

Run the docker containers

docker container run --name mysqldb --network glarimy -e MYSQL_ROOT_PASSWORD=admin -e MYSQL_DATABASE=glarimy -d mysql
docker container logs -f mysqldb
docker container run --network glarimy --name bank -p 8080:8080  glarimy/bank
docker container exec -it mysqldb bash

Verify the apps

curl -X POST -H 'Content-Type: application/json' -i 'http://localhost:8080/account/' --data '{"name":"Krishna", "phone":"9731423166"}'
curl 'http://localhost:8080/account/1'
curl -X POST -H 'Content-Type: application/json' -i 'http://localhost:8080/account/1/transaction' --data '{"amount":100, "type":"CR"}'
curl 'http://localhost:8080/account/1'

Run the docker compose

docker-compose up

Scale up using Kubernetes

Login to https://kubernetes.io/docs/tutorials/kubernetes-basics/create-cluster/cluster-interactive/

Start MiniKube (Single Node Cluster)

minikube start

Verify the nodes, pods and services

kubectl get nodes
kubectl get deployments
kubectl get pods
kubectl get services

Launch pod with MySQL

kubectl create -f mysql-pod.yml
kubectl get pods
kubectl describe pods
kubectl logs mysqldb
kubectl exec -it mysqldb bash

Expose MySQL as a service

kubectl expose pod mysqldb --port=3306 --name=mysqldb --type=NodePort
kubectl get services
kubectl describe services

Launch pod replicas with bank deployment

kubectl apply -f bank-deployment.yml
kubectl get deployments
kubectl get pods
kubectl describe pods
kubectl logs bank

Expose bank as a service

kubectl expose deployment/bank --port=8080 --name=bank --type=NodePort
kubectl get services
kubectl describe services
kubectl scale deployments/bank --replicas=5
kubectl get services

Access REST services locally

minikube ip
kubectl get services
curl -X POST -H 'Content-Type: application/json' -i <minikube ip>:<nodePort>/account/ --data '{"name":"Krishna", "phone":"9731423166"}'
curl '<minikube ip>:<nodePort>/account/1'
curl -X POST -H 'Content-Type: application/json' -i <minikube ip>:<nodePort>/account/1/transaction' --data '{"amount":100, "type":"CR"}'
curl '<minikube ip>:<nodePort>/account/1'

Access REST externally

http://<dns>/account/1'