Homework - Spring Cloud 3.4 - Training04 - Configuration

Create 2 services, which will use Spring Cloud Config Server and Eureka Server

• Use two different profiles
  • profile PROD -> db MYSQL (empty db)
  • profile DEV -> local db H2 (fulfilled with sample data)

Steb by step (solution)

1. Create eureka-server (new module)

• add dependency spring-web
• add dependency eureka-server
• add annotation @EnableEurekaServer
• add basic configuration in application.properties

server.port=8761
eureka.client.register-with-eureka=false
eureka.client.register-fetch-registry=false

2. Create config-server (new module)

• add dependency spring-web
• add dependency spring-cloud-config-server
• add annotation @EnableConfigServer
• add basic configuration in application.properties

spring.application.name=config-server
server.port=8888

spring.cloud.config.server.git.uri=https://github.com/pkozimor/spring-cloud-3-4-homework-training04-configuration
spring.cloud.config.server.git.username=${GIT_USERNAME}
spring.cloud.config.server.git.password=${GIT_TOKEN}
spring.cloud.config.server.git.clone-on-start=true

3. Create ms1 (new module)

• add dependency spring-web
• add dependency spring-config-client (spring-cloud-starter-config)
• add dependency spring-eureka-client (spring-cloud-starter-netflix-eureka-client)
• optionally add annotation @EnableDiscoveryClient (not required since Spring Cloud 1.4.0)
• add basic configuration in application.properties

spring.application.name=ms1
eureka.instance.appname=${spring.application.name}
eureka.instance.instance-id=${spring.application.name}:${random.uuid}
server.port=0

spring.config.import=configserver:http://localhost:8888

.

4. Configure PROD, DEV profiles and database connections for ms1 service

• add dependency spring-boot-starter-data-jpa
• add dependency mysql-connector-java
• create dedicated basic configuration file for ms1 service called ms1.properties within remote config repository https://github.com/pkozimor/spring-cloud-3-4-homework-training04-configuration
• move basic configuration from application.properties to ms1.properties

eureka.instance.appname=${spring.application.name}
eureka.instance.instance-id=${spring.application.name}:${random.uuid}
server.port=0

• create dedicated configuration for PROD profile for ms1 service called ms1-prod.properties within remote config repository https://github.com/pkozimor/spring-cloud-3-4-homework-training04-configuration

spring.datasource.url=jdbc:mysql://localhost:3306/content_db
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.jpa.hibernate.ddl-auto=update
spring.jpa.defer-datasource-initialization=true
spring.sql.init.mode=never

• add dependency h2
• create dedicated configuration for DEV profile for ms1 service called ms1-dev.properties within remote config repository https://github.com/pkozimor/spring-cloud-3-4-homework-training04-configuration

spring.datasource.url=jdbc:h2:mem:content_db;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE
spring.datasource.username=sa
spring.datasource.password=
spring.datasource.driver-class-name=org.h2.Driver
spring.jpa.hibernate.ddl-auto=update
spring.jpa.defer-datasource-initialization=true
spring.sql.init.mode=always
spring.h2.console.enabled=true
spring.h2.console.settings.web-allow-others=true

• add sql file with random data to fill DEV profile data.sql
• create sample java code and endpoints to test connection to H2 and MySQL databases Content, ContentRepository, ContentController
• create POST request to test adding content to the database

5. Create ms2 (new module)

• add dependency spring-web
• add dependency spring-config-client (spring-cloud-starter-config)
• add dependency spring-eureka-client (spring-cloud-starter-netflix-eureka-client)
• add dependency spring-boot-starter-data-jpa
• add dependency mysql-connector-java
• add dependency h2
• optionally add annotation @EnableDiscoveryClient (not required since Spring Cloud 1.4.0)
• add basic configuration in application.properties

spring.application.name=ms1
spring.config.import=optional:configserver:http://localhost:8888
spring.profiles.active=dev

• add basic configuration for basic profile within external config repository ms2.properties

eureka.instance.appname=${spring.application.name}
eureka.instance.instance-id=${spring.application.name}:${random.uuid}
server.port=0

• add configuration for PROD profile within external config repository ms2-prod.properties

spring.datasource.url=jdbc:mysql://localhost:3306/content_db
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.jpa.hibernate.ddl-auto=update
spring.jpa.defer-datasource-initialization=true
spring.sql.init.mode=never

• add configuration for DEV profile within external config repository ms2-dev.properties

spring.datasource.url=jdbc:h2:mem:content_db;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE
spring.datasource.username=sa
spring.datasource.password=
spring.datasource.driver-class-name=org.h2.Driver
spring.jpa.hibernate.ddl-auto=update
spring.jpa.defer-datasource-initialization=true
spring.sql.init.mode=always
spring.h2.console.enabled=true
spring.h2.console.settings.web-allow-others=true