Spring, MongoDB and Kubernetes

The following document describes the deployment of a basic Spring API Service and MongoDB web stack on Kubernetes. Currently this example does not use replica sets for MongoDB.

Using Replication Controllers for building MongoDB

Requirements

Java: JDK 1.8
Maven Build
Docker and Minikube on local

Kubernetes

Using Minikube: build on local

Minikube

minikube start

minikube stop

APIs Service

Build API Service

$ cd api-service
$ mvn package -DskipTests=True

Create docker images for APIs Service and push Docker Hub

$ cd api-service
$ docker build -t nhatthai/api-service .
$ docker push nhatthai/api-service

Create Persitant Volume

$ cd manifests
$ kubectl create -f mongo-pv.yml
$ kubectl get pv

Create Persitant Volume Claim

$ cd manifests
$ kubectl create -f mongo-pvc.yml
$ kubectl get pvc

Create MongoDB Controller

$ cd manifests
$ kubectl create -f mongo-controller.yml

Create MongoDB Service

$ cd manifests
$ kubectl create -f mongo-service.yml

Create API Service Deployment

$ cd manifests
$ kubectl create -f api-deploy.yml

Create API Service

$ cd manifests
$ kubectl create -f api-service.yml

Check Services

$ kubectl describe services

$ kubectl describe replicationcontrollers/mongo-controller

$ kubectl exec -it mongo-controller-vbqf4 -c mongo bash

Enable and Create Ingress

$ minikube addons enable ingress

$ cd manifests
$ kubectl create -f ingress.yml

Add mysite.com into /etc/hosts

$ minikube ip
192.168.99.100

192.168.99.100 mysite.com

Notes

Config MongoDB

Check config MongoDB in api-service/src/main/resources/application.properties

Create API Service Replication Controller

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux_atomic_host/7/html/getting_started_with_kubernetes/get_started_orchestrating_containers_with_kubernetes#exploring_kubernetes_pods

We can create API Service Replication Controller instead of a API Service Deployment. Please checkout Git branch: replication-api-service

$ cd manifests
$ kubectl create -f api-controller.yml

Usage

Create a student

POST http://mysite.com/student

{
	"id": "1",
	"name": "NhatThai",
	"description": "Programmer",
	"courses": [{
		"id": "1",
		"name": "Minikube on local",
		"description": "Kubenetes",
		"steps": [1]
	}]
}

Get all student

http://mysite.com/students

Reference

Running a MEAN stack on Google Cloud Platform with Kubernetes

Node.js and MongoDB on Kubernetes

GET STARTED PROVISIONING STORAGE IN KUBERNETES