OpenShift learning tutorial on spring:
https://learn.openshift.com/middleware/rhoar-getting-started-spring/

Spring Boot Microservices on Red Hat OpenShift Container Platform 3:
https://access.redhat.com/documentation/en-us/reference_architectures/2017/html-single/spring_boot_microservices_on_red_hat_openshift_container_platform_3/index

Deploying a Spring Boot App with MySQL on OpenShift:
https://developers.redhat.com/blog/2018/03/27/spring-boot-mysql-openshift/

Spring Boot get started guide:
https://spring.io/guides/gs/spring-boot/

RHOAR:
https://developers.redhat.com/products/rhoar/overview/