You shall not FaaS - Speaker Deck

You shall not FaaS

by manu rink

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You shall not FaaS Manuela Rink Software Engineer @

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FaaS You shall not

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Love at first sight! But then…

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Did it hurt when... ... you created a "at least it does it's job" thing ... and then said "Nah" [ things happened ] ... did things your common way? [ no profit ] http://4.bp.blogspot.com/-GyHYgJ89IPM/UdUMR4XyAjI/AAAAAAAAJEc/uMw6_Pqqrs8/s570/02-words_add_meaning_to_pictures.jpg

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Said it’s just not ready yet… ... when you created a thing [ things happened ] ... and instantly deleted it? [ no profit ] http://favoritememes.com/_nw/88/84578727.jpg

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You started hating it when… ... you missed something during development [ things happened ] ... and burned a serious amout of money? [ no profit ] http://iruntheinternet.com/lulzdump/images/science-wizard-burning-money-dollars-14189000382.jpg

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https://sourcebox.be/blog/2017/08/07/serverless-a-lesson-learned-the-hard-way/ 2 weeks vacation Current $ 5 Forecast $ 83 Current $ 180 Forecast $ 800 Update calc cache duration write metadata blob change activated The ~$200 return!

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What you need to know…

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Jeff is NOT… the holy grail to system architecture http://www.thecooltshirt.com/wp-content/uploads/2015/01/qwertee_banksypython125.jpg

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Jeff is NOT… a fluffy tool to solve all design & architecture problems http://cdn7.viralscape.com/wp-content/uploads/2015/04/Flying-Cat-19.jpg

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Jeff will NOT… help reduce your system’s complexity magically in fact you might even make it worse https://imgflip.com/

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Serverless is… a software engineering pattern …not more and not less https://imgflip.com/

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https://imgflip.com/ A quick guide

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Example A: Copy & Paste to Serverless Production System Let’s call it legacy “Future proof” System You needed to rewrite “a lot” anyway

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Example B: The Green Field - $everything serverless Brand new $all serverless Just … because reasons!

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Example C: The Agile “Let’s see” approach Agile System If it’s not good, it isn’t done yet

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And the guide? https://imgflip.com/

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Serverless is… Stateless Loosely coupled Fully managed Auto scaled Pay what you use

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Architecture Latency Consistency Availability Need for State Costs o Usage o Memory need o Your budget? o Again: Architecture! Think about…

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Consumption Plan “pay what you use” dynamic auto scale App Service Plan “my fixed resources” planned scaling