an introduction to microservices
TRANSCRIPT
An Introduction to MicroservicesURI GOLDSTEIN, MARCH 2017
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Agenda
History and DefinitionsMajor CharacteristicsStrengths and ChallengesFurther Investigation
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A Bit of History
Term coined in 2011 Popular and gaining
popularity Evangelized by Netflix, AWS All the cool kids are doing it*
* Not really, no.
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Definition
There Is No Band Official Definition
Definitions
Netflix:“Fine grained SOA”
The web:“SOA Done Right”
@urig:“SOA in the Cloud”
James Lewis & Martin Fowler, 2014:
“An Architectural Style”
Must-read article 9 Common Characteristics
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Ex: Monolith vs Microservices
Microservices are services
Single Responsibility
Easily upgraded
Easily replaced
1 Service = 1 Process
Exclusive Ownership of Data
Polyglot Technology
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Microservices are micro
“Small enough to fit in one’s head”
Typically Tens to Tens of Thousands LOC
Owned by single person / team
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Products not Projects
“You build it, You run it”
DevOps Skills and Mentality
Evolutionary Design
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Business drives architecture
Cross-functional teams
Organized around Business Capability
1 Service ≈ 1 Business Feature
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Smart endpoints and dumb pipes
Microservices are the Anti-ESB
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Smart endpoints and dumb pipes
More like WWW:
Logic resides in endpointsComm. layer is simpleTypically REST
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Distributed Means Distributed
Designed for FailureStatelessAsynchronous
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Benefits
Highly ScalableCost Effective*Fast and FuriousCloud Native
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Challenges
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No Compiler Safety Net
TestingVersioningBackward Compatibility
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Easy Deployment Isn’t Easy
DevOpsAutomationContinuous Delivery / Deployment
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Network Latency and Reliability
Design for FailureRedundancyMonitoringAutomation
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Take-Aways
One size does not fit allChallenges are significantDo you have the skills to mitigate them?Are the benefits relevant for you?
The Good News:
It’s not all or Nothing
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Further reading
Microservices Resource Guidehttps://www.martinfowler.com/microservices/
Microservices Article: Lewis, James & Fowler, Martinhttps://martinfowler.com/articles/microservices.html
Adrian Cockroft: Migrating to Microservices (video)https://www.infoq.com/presentations/migration-cloud-native
Loads more…
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Thanks for listening – Question Time
GDG Rishon JetBrains give away!http://tinyurl.com/GDGRL-March