In this talk, Kenny Bastani will introduce you to Spring Cloud, a set of tools for building cloud-native JVM applications. We will take a look at some of the common patterns for microservice architectures and how to use Cloud Foundry to deploy multiple microservices to the cloud. We will also dive into a microservices example project of a cloud-native application built using Spring Boot and Spring Cloud. Using this example project, I'll show you how to use Cloud Foundry to spin up a microservice cluster. We will then explore what a cloud-native application looks like when using self-describing REST APIs that link multiple microservices together.

1. © 2016 Pivotal Software, Inc. All rights reserved.
Cloud Native Java Microservices
Kenny Bastani
Spring Developer Advocate
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2. Kenny Bastani
@kennybastani
Spring Developer Advocate

3. Agenda
Agenda
1 Microservices & Cloud Native
2 Spring Boot
3 Spring Cloud
4 RESTful Microservices
5 Push to Cloud Foundry

4. © 2016 Pivotal Software, Inc. All rights reserved.
Microservices
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5. Monolithic Architecture

6. SOA - Service Oriented Architecture

7. Microservice Architecture
• Each team gets one database and one service
• Shared caches are platform provided services that are shared for consistency

8. Monolithic Architecture

9. Monolith to Microservice

10. Monolith to Microservice

11. © 2016 Pivotal Software, Inc. All rights reserved.
Cloud Native Apps
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12. Cloud Native & Microservices
• Microservices are only a small part of
a larger picture
Cloud
Microservices

13. Twelve-factor Application Configuration

14. Twelve-factor Application Deployment

15. © 2016 Pivotal Software, Inc. All rights reserved.
Cloud Native Ops
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16. Application Server Deployment - Monolith
• Load balancing requires provisioning
of new VMs and app server
installations
• Poor resource isolation; memory
leaks can cause other applications
to become unavailable
• Runtime environment is driven by
the operator
Virtual Machine
App
Linux Kernel
App App
Hardware Infrastructure

17. Linux Container Deployment - Microservice
• Development team drives the
application runtime of a container
• Containers are resource isolated,
allowing efficient scheduling onto a
grid of VMs
• Containers take seconds to start,
VMs take minutes
• It’s not a rule that there is one
microservice per container
Virtual Machine
Container
Linux Kernel
App App
App App
Container
App App
App App
Container
App App
App App
Hardware Infrastructure

18. Microservices - Container Deployment
• Each microservice can be containerized with their application dependencies
• Containers get scheduled on virtual machines with an allotted resource policy

19. Auto-scaling
• Minutes to start a VM, but seconds to start a container
• An elastic runtime handles auto-scaling of VMs with cloud providers

20. Orchestration
• Each microservice needs to communicate outside containers
• Service discovery provides an automatic method for finding other service dependencies

21. © 2016 Pivotal Software, Inc. All rights reserved.
Cloud Native Java
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22. © 2016 Pivotal Software, Inc. All rights reserved.
Spring Boot
A JVM micro-framework for building
microservices
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23. What is Spring Boot?

24. spring boot
Spring Initializr for boostraping your applications
supports rapid development of
production-ready applications
and services

25. Spring Boot Roles

26. Automatic Configuration
• An application class is annotated with @SpringBootApplication
• Additional annotations are added to indicate the role of the Spring Boot application

27. Spring Boot for Microservices

28. © 2016 Pivotal Software, Inc. All rights reserved.
Spring Cloud
A toolset designed for building distributed
systems
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29. spring cloud
Apache Zookeeper
these logos are all trademark/copyright their respective owners (T-B, L-R):
Netflix, amazon.com, Apache Software Foundation, Cloud Foundry, Hashicorp
they are ALL great organizations and we love their open-source and their APIs!!
*

30. What is Spring Cloud?
✴ Service Discovery
✴ API Gateway
✴ Config Server
✴ Circuit Breakers
✴ Distributed Tracing

31. What is Spring Cloud?
• Spring Cloud provides a way to turn Spring Boot microservices into distributed
applications

32. Service Discovery & Intelligent Routing

33. Client-side load balancing

34. Configuration Service

35. API Gateway

36. © 2016 Pivotal Software, Inc. All rights reserved.
RESTful Microservices
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37. © 2016 Pivotal Software, Inc. All rights reserved.
HATEOAS
Hypermedia as the Engine of Application State
(REST APIs that self-describe)
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38. It’s pronounced hawt-ee-oh-as

39. Richardson Maturity Model
Photo credit: Packt Publishing

40. REST API Gateway
• API gateway downloads routes from
services exposing REST APIs
• Each route of other microservices will be
hosted on the API gateway
• API gateway will automatically reverse
proxy to backend services
• Hypermedia allows traversing entire
REST API description of microservices

41. Browsing REST APIs

42. ©2015 Apigee. All Rights Reserved.
Each API call provides links

43. © 2016 Pivotal Software, Inc. All rights reserved.
Cloud Foundry
“To always be shipping, you need a shipyard.”
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44. © 2016 Pivotal Software, Inc. All rights reserved.
Application-centric opinionated platform
Cloud Foundry
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45. Push to Cloud Foundry
• http://run.pivotal.io
• Go to Spring Initializr, select Web
• Name the artifactId hello-world
• Add a @RestController named Hello
• Return “Hello World” at the root endpoint
• mvn clean install & cf push

46. © 2016 Pivotal Software, Inc. All rights reserved.
Thanks!
@kennybastani
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