Red Hat SummitChapter 1. Introduction to Application Development with Spring Boot
This section explains the basic concepts of application development with Red Hat runtimes. It also provides an overview about the Spring Boot runtime.
1.1. Overview of Application Development with Red Hat Runtimes
Red Hat OpenShift is a container application platform, which provides a collection of cloud-native runtimes. You can use the runtimes to develop, build, and deploy Java or JavaScript applications on OpenShift.
Application development using Red Hat Runtimes for OpenShift includes:
- A collection of runtimes, such as, Eclipse Vert.x, Thorntail, Spring Boot, and so on, designed to run on OpenShift.
- A prescriptive approach to cloud-native development on OpenShift.
OpenShift helps you manage, secure, and automate the deployment and monitoring of your applications. You can break your business problems into smaller microservices and use OpenShift to deploy, monitor, and maintain the microservices. You can implement patterns such as circuit breaker, health check, and service discovery, in your applications.
Cloud-native development takes full advantage of cloud computing.
You can build, deploy, and manage your applications on:
- OpenShift Container Platform
- A private on-premise cloud by Red Hat.
- Red Hat CodeReady Studio
- An integrated development environment (IDE) for developing, testing, and deploying applications.
This guide provides detailed information about the Spring Boot runtime. For more information on other runtimes, see the relevant runtime documentation.
1.2. Overview of Spring Boot
Spring Boot lets you create stand-alone Spring-based applications. See Additional Resources for a list of documents about Spring Boot.
Spring Boot on OpenShift combines streamlined application development capabilities of Spring Boot with the infrastructure and container orchestration functionalities of the OpenShift, such as:
- rolling updates
- service discovery
- canary deployments
- ways to implement common microservice patterns: externalized configuration, health check, circuit breaker, and failover
1.2.1. Spring Boot features and frameworks summary
This guide covers using Spring Boot to develop cloud-native applications on OpenShift. The examples applications in subsequent sections show how to integrate Spring Boot with other Red Hat technologies. You can use these integration capabilities to implement a set of modern design patterns that make your cloud-native Java applications:
- resilient
- responsive
- scalable
- secure
You can choose to build your Spring Boot applications on a regular web server stack or a non-blocking reactive stack.
Red Hat provides support for a release of Spring Boot based on the Snowdrop community project.
The supported runtime framework components include:
- A set of Spring Boot Starters for developing cloud-native Java-based applications on a servlet stack based on Apache Tomcat (Provided with Red Hat Java Web Server product offering) and JBoss Undertow (provided with Red Hat Enterprise Application Platform.)
- A set of Spring Boot Starters for developing cloud-native Java-based applications on a reactive stack using the Spring WebFlux non-blocking API, networking components provided by Eclipse Vert.x, and Reactor Netty.
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Dekorate, a collection of annotation parsers and application template generators for OpenShift and Kubernetes that integrates with Spring Boot. With Dekorate you can automatically create templates that you can use to configure your application for deployment to an OpenShift cluster. When you build your application, Dekorate extracts the configuration parameters from annotations in the source files of your application or from files that contain configuration properties (for example,
application.properties) in your application project. Dekorate then uses the extracted parameters to create and populate resource files that you can use to deploy your application to an OpenShift cluster. Dekorate works independently of the language and build tools you use, and integrates with multiple cloud-native application frameworks. Red Hat provides support for use of Dekorate to generate application templates for deploying Java-based applications on OpenShift Container Platform. Red Hat provides support for using Dekorate with Maven, other build tools are not supported.
1.2.2. Supported Architectures by Spring Boot
Spring Boot supports the following architectures:
- x86_64 (AMD64)
- IBM Z (s390x) in the OpenShift environment
- IBM Power Systems (ppc64le) in the OpenShift environment
Refer to the section Supported Java images for Spring Boot for more information about the image names.
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