Concevoir et déployer vos applications a base de microservices sur Cloud Foundry

1© 2015 Pivotal Software, Inc. All rights reserved.
Concevoir et déployer vos applications
à base de microservices
sur Cloud Foundry
Spring Cloud micro services +
Cassandra dans Cloud Foundry
26 mai 2015
Didier Burkhalter – Field Engineer Pivotal
@didierDIB

•  Cloud Foundry France est une communauté qui encourage les
discussions, les sessions techniques et le networking entre ses
membres, constitués de développeurs, programmeurs, architectes,
ingénieurs, consultants et chefs de projets partageant un intérêt
commun pour le PaaS open source Cloud
Foundry et la fondation Cloud Foundry.
•  Cloud Foundry France encourage les échanges d’idées et le
partage d’informations entre les utilisateurs et acteurs de l'éco
système Cloud Foundry.
Cloud Foundry France meetup

Concevoir et déployer vos application à base de
microservices sur Cloud Foundry
L'adop'on)des)modèles)d'architecture)à)base)de)microservices)et)"cloud9na've")
perme:ent)la)créa'on)rapide)d'applica'ons)modernes)et)scalables.)))
La)session)illustrera:))
9)pourquoi)le)choix)des)microservices,)quels)en)sont)les)challenges,)comment)
u'liser)les)modèles)des)géants)du)Net)comme)NeClix)?))
9)comment)construire)une)applica'on)à)base)de)micro9services)avec)les)services)
Spring)Cloud)NeClix)Eureka/Service)Discovery))et)Hystrix/Circuit)Breaker))
9)comment)déployer)et)opérer)votre)applica'on)micro)services)sur)une)plate9
forme)de)PaaS)Pivotal)Cloud)Foundry!)

Agenda
!  Les)micro)services,)quelles)déﬁni'ons)?)
!  Quels)challenges)
!  Pourquoi)le)choix)des)microservices)
!  S’inspirer)et)u'liser)les)modèles)de)NeClix)?)
!  Construire)une)applica'on)à)base)de)micro9services)avec)les)
services)Spring)Cloud)NeClix)Eureka/Service)Discovery))et)Hystrix/
Circuit)Breaker))
!  Déployer)votre)applica'on)micro)services)sur)une)plate9forme)de)
PaaS)Pivotal)Cloud)Foundry))
!  Q)/)R)

Microservice: une définition
Loosely coupled service oriented
architecture with bounded contexts
If every service has to be updated in concert,
it’s not loosely coupled!
If you have to know about surrounding
services you don’t have a bounded context.
Adrian Cockcroft, former Netﬂix Chief Cloud Architect

Microservice: Bounded Context
http://martinfowler.com/bliki/BoundedContext.html

Not Monoliths
Relational Database
Data Access
Service
HTML JavaScript MVC
Service
Monolithic ApplicationBrowser

Monolithic Architectures
•  « Easy » but complex
•  Modularity Dependent Upon Language / Frameworks
•  Change Cycles Tightly Coupled / Obstacle to Frequent Deploys
•  Inefficient Scaling
•  Can be Intimidating to New Developers
•  Obstacle to Scaling Development
•  Requires Long-Term Commitment to Technical Stack

How you should scale

Organize Around Business Capabilities
Data Access
Service
HTML JavaScript MVC
Service
UISpecialists
Middleware
Specialists
DBAs
BusinessCapability
BusinessCapability
BusinessCapability
Siloed
Functional
Teams
http://martinfowler.com/articles/microservices.html#OrganizedAroundBusinessCapabilities
Siloed
Application
Architectures
Cross-
functional
Teams
Microservice
Architectures

http://tech.gilt.com/post/102628539834/making-architecture-work-in-microservice

Microservices Overview

Microservice Architecture
…
HTTP
HTTP
HTTP
HTTP
HTTP
HTTP
AMQP
AMQP
Relational
DB
Key/Value
Store
Graph
DB
HTTP

Microservice Architectures
•  « Simple » system / Hard to work with
•  Modularity Based on Component Services
•  Change Cycles Decoupled / Enable Frequent Deploys
•  Efficient Scaling
•  Individual Components Less Intimidating to New Developers
•  Enables Scaling of Development
•  Eliminates Long-Term Commitment to Technical Stack

But Microservices!

Enabling Continuous Delivery
Product
Mgr
UX Dev QA DBA
Sys
Admin
Net
Admin
Storage
Admin
BUSINESS CAPABILITY TEAMS
USING MICROSERVICES
PLATFORM OPERATIONS
TEAM
Self
Service
API
Adapted from: http://www.slideshare.net/adriancockcroft/goto-berlin

But no Microservice is an Island…

The Dark side of distributed systems
•  See the Great article by Chris Richardson : http://www.infoq.com/articles/
microservices-intro
!  Configuration Management
!  Service Registration & Discovery
!  Routing & Load Balancing
!  Fault Tolerance (Circuit Breakers!)
!  Monitoring
!  Multiple remote calls, entity relationships

Unless otherwise indicated, these slides are © 2013-2014 Pivotal Software, Inc. and licensed under a
Creative Commons Attribution-NonCommercial license: http://creativecommons.org/licenses/by-nc/3.0/
Spring Cloud

Dedicated Spring Cloud Netflix module

Netflix OSS
•  Eureka
•  Hystrix + Turbine
•  Ribbon
•  Feign
•  Zuul
•  …

Breaking
the
Monolith
Service A
Service C
Service B

Now
microservices
HelloServer HelloClient
Service C

Finding
services
? ?
Client
? ?

Service
Discovery
Eureka
HelloClient
1.Register
HelloServer
3.Connect
Consumer
HelloServer
Producer
2.Discover

Running a Eureka Server
@SpringBootApplication
@EnableEurekaServer
public class EurekaApplication {
public static void main(String[] args) {
SpringApplication.run(EurekaApplication.class, args);
}
}

Client load
Balancing
ribbon
Passport
Contact
#1 Contact
#2
Contact
#3
ribbon
Round robin

Cascading
faults
Service
A
Service
B

Circuit
breaker
hystrix
Service
A
Service
B
Fallback

Service Registration/Discovery

Paying for your lunch…
!  Significant Operations Overhead
!  Substantial DevOps Skills Required
!  Implicit Interfaces
!  Duplication of Effort
!  Distributed System Complexity
!  Asynchronicity is Difficult!
!  Testability Challenges

It takes a platform…
Cloud Foundry Spring Cloud
Services

Code
Open Source
Clouds'privés'Clouds'publics'
CUSTOM SERVICES
Cloud Foundry: Open PaaS
CUSTOM RUNTIMES
Mul0ples'
Distribu0ons'
Fondation Cloud Foundry
& Gouvernance

Cloud Foundry Features / Service suite
!  Environment Provisioning
!  On-Demand/Automatic Scaling
!  Failover/Resilience
!  Routing/Load Balancing
!  Data Service Operations
!  Monitoring
Conﬁg Server Service Registry
Circuit Breaker
Dashboard
Spring Cloud Services

μServices
with
Bindable Services
In-App Support Libraries
BETA
To come soon

Published March 16, 2015
Available to you compliments
of Pivotal!
http://bit.ly/cloud-native-book

Where to start ?

Bibliographie / sources
!  h:p://cloud.spring.io/spring9cloud9neClix/spring9cloud9neClix.html)
!  h:p://www.infoq.com/ar'cles/boot9microservices)
!  Mar'n)Fowler):)h:p://mar'nfowler.com/ar'cles/microservices.html)
!  h:ps://github.com/ms'ne)
!  Adrian)CockcroX,)Chief)Cloud)Architect,)NeClix:)h:ps://vimeo.com/78414823)
!  Domain9Driven)Design:)Tackling)Complexity)in)the)Heart)of)SoXware)
!  h:p://blog.pivotal.io/podcasts9pivotal/features/pivotal9conversa'ons9so9isnt9
microservices9just9soa9with9json)
!  h:p://www.ac'vestate.com/blog/2015/05/microservices9'ps9tricks)
!  h:p://tech.gilt.com/post/102628539834/making9architecture9work9in9microservice)

Concevoir et déployer vos applications a base de microservices sur Cloud Foundry

Concevoir et déployer vos applications a base de microservices sur Cloud Foundry

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