The document discusses serverless architectures and their benefits, specifically focusing on Function as a Service (FaaS) and Pivotal Function Service (PFS). It highlights the efficiency, development productivity, and resource optimization offered by serverless solutions, as well as the features and functionalities of PFS, such as support for Spring Cloud Data Flow and various lifecycle management options. Additionally, it introduces the Riff project as an open-source FaaS offering for Kubernetes environments and describes the programming models supported by Spring Cloud Function.

1. Serverless Spring
오 충현( coh@pivotal.io )
Senior Solutions Architect
1
𝑓 𝑥 = 𝑃𝐹𝑆 +
𝑛=1
∞
𝑆𝑝𝑟𝑖𝑛𝑔

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3. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
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• Serverless? FaaS?
• Pivotal Function
Service
• PFS Demo
• Spring Cloud Function

4. Serverless? FaaS?

5. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
The Serverless wave is happening!

6. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
“Serverless architectures refer to applications that
significantly depend on third-party services (Backend as a
Service or BaaS) or on custom code that's run in ephemeral
containers (Function as a Service or FaaS)”
Serverless
‘서버는 존재하지만, 관리 대상이 아님’

7. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
왜 서버리스인가?
7
운영 효율개발 생산성
리소스
최적 활용
 Narrowly-scoped units
of code, and the
simplicity of built-in
event integration,
contribute to software
 Functions which don't
consume resources
when idle can provide
significant resource
efficiencies
 Zero Admin
 Auto self-scaling
 Automated event-
based scheduling
 Pay-per-use

8. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Function as a Service
8
PaaS FaaS
runs apps runs functions
push app to deploy server register function and bind it to a trigger
server runs and waits for requests function doesn't run until triggered
server listens to network platform deploys and invokes functions
server handles lots of requests functions handle events and then go away
scale out manually or by policy auto-scale based on concurrent event load
pay per instance pay per use – time & memory

9. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
현재 사용할 수 있는 FaaS
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[ Cloud Service ] [ Open Source Project ]

10. Pivotal Function Service

11. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Pivotal Function Service
11
PFS는 개발자에게
자신의 ‘쿠버네티스’ 환경에
’함수’를 실행할 수 있는 서비스 제공(FaaS)
주요 기능
• Spring Cloud Data Flow 지원: Integration, ETL, EAI, 이벤트 스트림 처리
• 함수의 다양한 생명주기 지원: Jobs, warm container pools, streams,
suspend/resume
• 플러그인 가능한 함수 처리기: Shell, Node.js, Python, Spring/Java, …
• 플러그인 가능한 이벤트 브로커: Kafka, RabbitMQ
• 쿠버네티스 기반: Custom Resource Definitions, controllers, API aggregation

12. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
ICE 법칙
12
쿠버네티스기반 서버리스는 2개만 선택
Immediate
Instant-on
Consistent
Immutable
Containers
Efficient
Scale to Zero
• 요청 발생 시 함수 컨테이너 실행
=> 최초 실행 느림
• 실행 중인 컨테이너에 함수 코드 주입
=> 컨테이너 환경의 일관성 저해
• 함수 컨테이너를 계속 실행
=> 요청 없어도 리소스 점유(비용)
* Mark Fisher, Sep 2017

13. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Riff 프로젝트: Open Source FaaS
13
Riff는 ‘쿠버네티스’ 환경에
이벤트에 응대하여 ’함수’를
실행할 수 있는 서비스 제공
- PFS의 OSS 프로젝트
Features
★ event streaming
★ polyglot
★ Kubernetes-native
Events
f(x)
f(x)
f(x)
Functions
f(x)
riff

14. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
14
echo "hello $1"
greeter.sh
module.exports = (x) => x ** 2
square.js
개발자: 함수 코드 작성
public class Greeter implements Function<String, String> { public String
apply(String name) {
return "Hello " + name;
}
}
Greeter.java

15. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
플랫폼: 함수를 컨테이너에 탑재해서 배포
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Function
Invoker
함수 컨테이너
기본 이미지
함수 레이어
함수 컨테이너
레지스트리

16. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
플랫폼: 이벤트 발생 시 함수 호출
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Function Pod
Function ContainerSidecar Container
Event
Broker
broker-specific
API
binder dispatcher invoker function
HTTP
gRPC
stdio

17. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
17
플랫폼: 함수/토픽을 쿠버네티스 리소스로 관리
Function
Controller
Function YAML
- name
- input / output topics
- artifact / params
Topic YAML
- name
- params
KafkaHttp Gateway
Topic Controller
Sc Fn
Pod
Sc Fn
Pod
Sc Fn
Pod
k8s API

18. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
플랫폼: 이벤트 증가에 따라 자동 확장
riff function controller
★ interacts with K8s API
★ scales functions 0-1 and 1-N
★ monitors event-lag in Kafka
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Function
Controller
Event Broker
f(x)
f(x)
f(x)
k8s API

19. Pivotal Function Service(Riff) 데모

20. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
20
helm init
helm repo add riffrepo https://riff.charts.storage.googleapps.com
helm repo update
Helm Chart로 설치
helm install riffrepo/riff --name s1p
--set httpGateway.service.type=NodePort

21. Spring Cloud Function

22. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
“All the benefits of serverless, but with full access to Spring
and build tools. Decouple lifecycle of business logic from
runtime platform.”
Spring Cloud Function

23. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Spring Cloud Function 특장점
• FaaS 서비스 제공자에 종속되지
않음
• 독립된 클래스로드를 사용한 스프링
부트로 실행 (JVM Packaging)
• 자바 8의 기본 함수 인터페이스 사용
• 자동 함수 컴포넌트 스캔
• 자바 함수 문자열을 동적 컴파일
• 클라우드 FaaS 에서 실행을 위한
Adapters 제공

24. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Spring Cloud Function Web
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HTTP
User Function
Web
Spring Boot

25. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
프로그램밍 모델: Function, Consumer,
Supplier

26. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
프로그램밍 모델: @Beans

27. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
프로그램밍 모델: Plain Old Function
package functions;
import java.util.function.Function;
public class Greeter implements Function<String, String> {
@Override
public String apply(String s) {
return "Serverless Spring:: " + s;
}
}

28. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Spring Cloud Function Stream
28
HTTP
User Function
Stream
Spring Boot
Message
Web

29. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
29
public class VoteStreamProcessor
implements Function<Flux<String>, Flux<Map<String, Object>>> {
public Flux<Map<String, Object>> apply( Flux<String> words) {
return words.window(Duration.ofSeconds(60), Duration.ofSeconds(2))
.concatMap(w -> w.collect(VoteAggregate::new,
VoteAggregate::sum)
.map(VoteAggregate::windowMap), Integer.MAX_VALUE);
}
}
Programming Model: Streams using Reactor
VoteStreamProcessor.java

30. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Spring Cloud Function Adapter
30
HTTP
User Function
Serverless Provider
Spring Boot
Message
Adapter

31. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
데모 : Streams using Reactor
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HTTP
Gateway
Kafka
f(x)
f(x)
vote-counter
vote-stream
processor
votes
topic
redis

32. Wrap-up

33. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Enterprise PaaS

34. Unless otherwise indicated, these slides are © 2013 -2018 Piv otal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Enterprise FaaS

35. Learn More. Stay Connected.
github.com/projectriff/riff
cloud.spring.io/spring-cloud-function
35
#springone@s1p

36. 36
링크: https://goo.gl/53aEtB
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