Spring Cloud use case

[cmoulliard]

• Developer creates a (server-side) project using Spring Initializr. While the developer has many options to choose from, we are going to focus on a distinct subset of features. The developer selects the following features: Web Actuator Config Eureka Discovery JPA Rest Repository

• Developer adds configuration capabilities, reading application configuration through a ConfigMap Developer extends application by externalizing configuration. During development of a service, this is done using an application.properties file exposed through a ConfigMap mounted volume.

• Developer creates and deploys Eureka Server Developer creates and Eureka Server (using @EnableEurekaServer) and provisions it using the fabric8 maven plugin during development

• Developer creates business entities Developer uses JPA and the Spring JPA Repository to build a data model, and then exposes those as restful endpoints using the Rest Repository API. The service is also registered with the Eureka Server

• Developer provision Hystrix Dashboard in OpenShift

• Developer creates client application Spring Initializr that invokes the service Developer creates a client application that invokes the prior service. It looks up the service in the Eureka Registry (using DiscoveryClient). The client also uses Hystrix with a simple failover web page. The client also binds a stream to the Hystrix Dashboard. The client application is provisioned using the fabric8 maven plugin during development.

Remarks :

• Note that a Spring developer may decide to develop applications completely outside of openshift, including running a standalone eureka server, etc, and later deploy resulting artifacts to OpenShift
• I understand that I need to add something about S2I and/or the CI/CD pipeline, perhaps to simulate a more formal release process.
• Also, I could use help with the fabric8 maven plugin. I created a simple Spring app (using initializer) and tried to run it in openshift. It deploys but never starts :-/ I really need to get some hands-on. Was trying to validate the above use case, but I think you can help with that (limited time).

[cmoulliard]

Config

Which Spring Dependency do you refer here (Spring Cloud Config, Spring Configuration Processor, ...) ? @jclingan

[cmoulliard]

To be discussed with John (@jclingan)

• [ ] Web : https://spring.io/guides/gs/serving-web-content/
• [ ] JPA : https://spring.io/guides/gs/accessing-data-jpa/

[cmoulliard]

Spring Cloud is discussed through Trello Card - https://trello.com/c/dR1SBnWY/26-7-1-m-certify-spring-boot