muCon 2015 "The Business Behind Microservices: Organisational, Architectural, Operational Challenges"

The Business Behind Microservices:
OrganisationAL, architectural and Operational Challenges
Daniel Bryant

@danielbryantuk
daniel.bryant@opencredo.com

www.opencredo.com

Business and People == “Fluﬃness”?
12/11/15 @danielbryantuk

“Micro-ﬂuﬃness?”

A Proposal…

if done right, the “(micro)service” approach can
profoundly impact the way we deliver valuable so<ware

(But we said the same thing about agile, SOA, DevOps…)

1. Lets start with a Story... OpENCREDO Went Skiing

We are uncovering beDer ways of developing so<ware by doing it and
helping others do it.
Through this work we have come to value:

products over projects
small inter-discipline teams over large homogeneous cabals
mul1ple cohesive services over a comprehensive applicaLon
goal-driven technical leadership over command and control
automated con1nuous deployment over manual big bangs
individuals and interac1ons over processes and tools
…
ge6ng real sh*t done over creaLng manifestos that will
ulLmately be misinterpreted

We are uncovering beDer ways of developing so<ware by doing it and
helping others do it.
Through this work we have come to value:


OrganisaLon, architecture, (dev)operaLons

Who Am I?
•  London Java Community Associate
•  Adopt OpenJDK and JSR
•  InfoQ Editor, DZone MVB, Voxxed
•  Chief ScienLst at OpenCredo
ü  Digital/technical transformaLons
ü  Java, Golang, CI/CD, DevOps
ü  Microservices, cloud, containers
ü  Maintainer of muservicesweekly.com

2. Organisation: Conway was telling the truth...

Conway’s Law

Cross-funcLonal Teams
•  SpoLfy (bit.ly/1C46ZKo)
–  Culture
•  Amazon (bit.ly/1F3Dgkm)
–  CommunicaLon
•  Gilt (gi.lt/1rgyWvO)
–  Strategic alignment

Porfolio Planning
•  Budget for capacity (#NoProjects)
•  Predictable soiware development?
–  Chase veriﬁable value instead (KPIs)
•  Business cases secure funding…
–  Switch to “value-driven” projects
–  “What problems can we solve by X?”

A Word of CauLon
•  Divided Companies
–  TradiLonal ‘enterprise’ organisaLon
–  Command and control, specialised, division of labour
–  Predictable in stable environments
–  Six sigma, ESBs, and classical SOA
•  Connected Companies
–  Startups and forward-thinkers
–  Autonomous, fractal, service-focused
–  AdapLve in uncertain environments
–  Agile/lean, REST, and microservices

Bi-Modal / Tri-Modal IT
blog.gardeviance.org/2015/06/why-
agile-lean-and-six-sigma-must-die.html
Simon Wardley blogs extensively
in this space…

OrganisaLonal Values


user impact over customer requirements

crea1ng veriﬁable incremental value over adding features

incremental transforma1on over big-bang “re-org”

3. Architecture: think Micro, Think Macro, Think LEADERSHIP

Architectural/Design Skills
“If you can't build a [well-structured] monolith,
what makes you think microservices are the answer?”

Simon Brown
(bit.ly/1n7D0vp)

Architectural/Design Skills
stackexchange.com www.etsy.com

gilt.com (Are Awesome)
www.slideshare.net/trenaman/javaone-2015-scaling-micro-services-at-gilt

Architecture, Minus the Ivory Towers
•  Technical leadership (bit.ly/1EUwpLl)
•  CommunicaLon (bit.ly/1Ia3u8o)

•  Empathy
•  ‘Just enough’ up front design

MigraLng Architecture
•  Find seams
•  Measure toxicity of code
•  Standardise what marers (glue/infra)
•  Parerns (bit.ly/1GRch2v)
–  Big bang
–  Change via copy/extracLon
–  Strangle

Replacement/Message (Data) Flows
James Lewis
bit.ly/1Qy4g2d
Sam Newman
bit.ly/1WijsUX

Word of CauLon: EvaluaLon

“I will postpone using this shiny new framework
un6l my peers have validated the proposed beneﬁts
with rigorous scien6ﬁc experiments”

- Said by no programmer
…ever

Architectural Values


bounded contexts over a single domain model

autonomous goal-driven leadership over anarchy or command and control

implemen1ng signals and performance indicators over measuring vanity metrics


4. Operations: Automate everything (except the people)

Microservices… Macro OperaLons
•  Microservice Prerequisites (bit.ly/1wIjY58)
–  Rapid provisioning
–  Basic monitoring
–  Rapid applicaLon deployment
•  In a nutshell…
–  Technical part of DevOps
–  CI/CD

www.opencredo.com/2015/10/31/javaone-building-a-
microservice-development-ecosystem-video

In the Beginning…

AutomaLng Jobs Away?

…and in the Middle (and the ‘End’)

…and in the Middle (and the ‘End’)
www.infoq.com/news/2015/06/too-big-to-fail

Failing to Prepare, is Preparing to…
•  PracLce
–  Chaos, Gamedays, DiRT sessions
•  Accountability
–  R.A.S.C.I.
•  Engage system 2 thinking

Helpful Processes
•  BDD user journeys across system (via APIs)
–  …and individual services
–  Don’t forget ‘iliLes’ (ZAP, Jmeter)
•  Brendan Gregg’s USE methodology
–  check uLlizaLon, saturaLon, and errors.
•  Symptom-based Monitoring (Ticketmaster)

OperaLonal Values
designing for failure over implemenLng extensive redundancy

independent automated con1nuous deployment over coordinated manual
big bang releases

programmable infrastructure over manually-conﬁgured snowﬂakes

Individuals and interac1ons over processes and tools

symptom-driven monitoring over fault-report alerLng

5. Change management without Management double-speak

Change Management is EssenLal
•  Fair process (three ‘E’s)
–  Engagement
–  ExplanaLon
–  ExpectaLon
•  Leading change
–  TransformaLon is a process
–  Communicate, plan, evaluate, learn
–  Empowerment and empathy

Have a Lirle Empathy…

Some BedLme Reading…

In summary…

OrganisaLon, Architecture, OperaLons




Think HolisLcally

if done right, the “(micro)service” approach can
profoundly impact the way we deliver valuable so<ware

(Let’s learn from agile, SOA, DevOps…)

A Big Thanks To…

THANKS... QUESTIONS?

@danielbryantuk
daniel.bryant@opencredo.com

‘Microservices Weekly’ (muservicesweekly.com)

www.opencredo.com/blog

www.parleys.com/author/daniel-bryant
www.infoq.com/author/Daniel-Bryant


muCon 2015 "The Business Behind Microservices: Organisational, Architectural, Operational Challenges"

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muCon 2015 "The Business Behind Microservices: Organisational, Architectural, Operational Challenges"