docker-kubernetes-demo's Introduction

Spring Boot, MySQL, JPA, Hibernate Rest API Tutorial

Build Restful CRUD API for a simple Note-Taking application using Spring Boot, Mysql, JPA and Hibernate.

Requirements

Java - 1.8.x
Maven - 3.x.x
Mysql - 5.x.x

Steps to Setup

1. Credits

callicoder

2. Create Mysql database

create database employees

3. Change mysql username and password as per your installation

open src/main/resources/application.properties
change spring.datasource.username and spring.datasource.password as per your mysql installation

2. Build the app using maven

mvn clean package

Alternatively, you can run the app without packaging it using -

mvn spring-boot:run

The app will start running at http://localhost:8080.

Explore Rest APIs

The app defines following CRUD APIs.

GET /api/employees

POST /api/employees

GET /api/employees/{employeesId}

PUT /api/employees/{employeesId}

DELETE /api/employees/{employeesId}

You can test them using postman or any other rest client.

Docker Images for K8S Demo

Hardcoded Values

spring.datasource.url = jdbc:mysql://mysql-service:3306/hclDatabase?autoReconnect=true&useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true&useSSL=false
spring.datasource.username = hclUser
spring.datasource.password = hclPassword
spring.datasource.platform = mysql
spring.datasource.initialization-mode = always

siddharth67/springboot-mysql:hardcoded

K8S Dynamic Values

spring.datasource.url = jdbc:mysql://${KUBE_CONFIG_HOST}:${KUBE_CONFIG_PORT}/${KUBE_CONFIG_DATABASE}?autoReconnect=true&useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true&useSSL=false
spring.datasource.username = ${KUBE_SECRET_USERNAME}
spring.datasource.password = ${KUBE_SECRET_PASSWORD}
spring.datasource.platform = mysql
spring.datasource.initialization-mode = always