Microservices or not to MicroservicesWhat does the Chameleon say?

Cameron Seader

Technology Strategist

cs@suse.com

Federica Teodori

Project Manager Containers

fteodori@suse.com

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What is a Microservice?

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“Functional system decomposition into manageable and independently deployable components”

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What is a Microservice?

● Is that THE definition?

● Common characteristics: [*]● Componentization via Services● Organized around Business capabilities● Products, not Projects● Smart endpoints, dumb pipes● Decentralized Governance● Decentralized Data management● Infrastucture Automation● Design for failure● Evolutionary design

[*] http://martinfowler.com/articles/microservices.html

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Monoliths and Microservices

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Monolith

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Microservice

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Services as Components

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What's a component?

● A unit of software that is indipendently replaceable and upgradable● Why not libraries as components?● Minimize dependencies● Service == process ?

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“Any organization that designs a system will produce a design whose structure is a copy of the organization's communication structure”

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“you build it, you run it.”

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Project VS Products

● Owning the service fully, at all times● Support burden, or blessing?● Develop a relationship with end users

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Unix, the beginning of (almost) everything

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“Be of the web, not behind the web”

● Receive a request, apply logic as appropriate, produce a response.● Keep it simple!● Mind the noise

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GovernanceJust because you can do something,doesn’t mean you should

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Centralized

● Standardized Technology● Constricting

● Need the right tool

For the right job.

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Decentralized

● Split your monoliths up● C++, Node.js, Database, etc.● Reports, core processing

● Services give choice

and balance

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Enter “Open Source”

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Open Source

● Becoming common

for internal development

● Sharing of common

tools and code

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Open Source

● Amazon (You Build it / You Run it)

● Netflix – incentive to have quality code● Don’t want to fix things at 3am● Chaos Monkey, Simian Army

● Walmart (OneOps) – Cross compatability● Common point of entry for applications

● Give developers more responsibility● Run the systems they develop

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What about your data?

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Monolithic vs Microservices Approach

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Monolithic Data

● Maybe a single database● Components allow for flexibility

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Microservices Data

● Application Databases● Decentralized

● Transactions are challenging● Asynchronous vs synchronous

● Long term greater consistency

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CI/CD is your microservices foundation

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CI/CD Automation

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Who has time for all of that?

Efficiency – Deployment OptionsCI/CD Automation

System Inspection “Machinery”

Various Output Format

Report

Your Project

KIWI

Develop.…...........Build.....................Test................Deploy

YaST / AutoYaST

Ahhhhhh...

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CD: Lets make deployment boring

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CI/CD Automation

HerrererHerererer

Erereerereererere

HerrererHerererer

Erereerereererere

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What about service failures

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Service failures

● Netflix’s Simian Army● Induced failures

● Real Time monitoring● Service status, throughput, views per minute etc.

● Service Management● Start, restart, update, rollback, etc..

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Where do I start?

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Design it

● Change control● How to divide up the pieces, or slice up the application● Design from Monolith and then add on using microservices● Modular design through patterns of change● Components into services adds complexity for more granular

releases

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Is it the future?

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SUSE and Friends

SUSE Manager

SUSE Studio

Kiwi

SUSE Linux Enterprise

SUSE OpenStack Cloud SUSE

Enterprise Storage

Machinery

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So What Next...

Sessions: http://www.susecon.com/sessions.html

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BOV91679 - Migrating Deployment Processes and Continuous Integration at SAP SE to a Future-proof Design Using SLES12, Chef, GitHub, OBS and KIWI

TUT90009 - Tuning Your SUSE Linux Enterprise Server Virtualization Stack

http://developer.suse.com

http://packagehub.suse.com

http://build.opensuse.org