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SERVERLESS -
 BEST PRACTICES & LESSONS LEARNED NIKO KÖBLER (@DASNIKO)

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ABOUT ME ▸ Freelance Consultant/Architect/Developer/Trainer @ www.n-k.de ▸ Technical Advisor for Software & Support Media Group ▸ Doing stuff with & without computers, writing Software, ~ 20 yrs ▸ Co-Lead of JUG DA (https://www.jug-da.de / @JUG_DA) ▸ Speaker at international Tech Conferences ▸ Author of „Serverless Computing in AWS Cloud“
 serverlessbuch.de ▸ Twitter: @dasniko

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SERVERLESS COMPUTE MANIFESTO ▸Functions are the unit of deployment and scaling. ▸No machines, VMs or containers visible in the programming model or elsewhere. ▸Permanent storage lives elsewhere. (Functions are stateless!) ▸Scales per request: User cannot over- or under-provision capacity. ▸Never pay for idle (no cold servers/containers or their costs). ▸Implicitly fault-tolerant because functions can run anywhere. ▸BYOC - Bring Your Own Code. ▸Metrics and logging are a universal Right.

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SERVERLESS IS NOT FAAS ON CONTAINERS!

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SERVERLESS AWS BUILDING BLOCKS

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PAAS SERVERLESS IS AN EVOLUTION OF PAAS!

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USE CASES

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USE CASE: SERVERLESS WEB ARCHITECTURE

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USE CASE: SERVERLESS STREAM PROCESSING

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USE CASE: SERVERLESS ANALYTICS

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https://medium.com/@tjholowaychuk/dos-and-don-ts-of-aws-lambda-7dfcab7ad115

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USE CASE: SERVERLESS MAP/REDUCE

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MEANWHILE OTHERS… From: http://theburningmonk.com/2017/04/aws-lambda-3-pro-tips-for-working-with-kinesis-streams/ !

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ENVIRONMENT NO FREEDOM OF CHOICE AT
 RUNTIME & LANGUAGE ENVIRONMENTS (BOUND TO WHAT PROVIDER OFFERS)

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PROGRAMMING MODEL CACHING CONTAINERS OBJECTS

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PROGRAMMING MODEL STARTING (AND HANDLING!) OF OWN PROCESSES

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PROGRAMMING MODEL JAVASCRIPT CALL STACK & EVENT LOOP context.callbackWaitsForEmptyEventLoop

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ERROR HANDLING DEAD LETTER QUEUES

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AWS X-RAY

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AWS X-RAY

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TIME IS YOUR ENEMY!

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TIMEOUT LIMITS DEFAULT TIMEOUT MAX TIMEOUT

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EXECUTION-TIME MEMORY SETTINGS (RAM) HAVE IMPACTS ON CPU- & NETWORK-PERFORMANCE

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""" FUNCTION: 1 EXECUTION / HOUR 512 MB, 10 SEC. MONTHLY EXECUTION COUNT: 720 MONTHLY GB-SEC.: 3.600

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""" FUNCTION: 1 EXECUTION / HOUR 1536 MB, 2 SEC. MONTHLY EXECUTION COUNT: 720 MONTHLY GB-SEC.: 2.160

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COLD START
 LATENCY

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REDUCE LATENCY (AND COSTS) CLOUDWATCH EVENTS TO PRE-WARM FUNCTIONS

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""" FUNCTION: 1 EXECUTION / HOUR 1024 MB, 5 SEC. MONTHLY EXECUTION COUNT: 720 MONTHLY GB-SEC.: 3.600

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""" FUNCTION: 12 EXECUTIONS / HOUR 512 MB, 100 MS. MONTHLY EXECUTION COUNT: 8.640 MONTHLY GB-SEC.: 432

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https://hackernoon.com/im-afraid-you-re-thinking-about-aws-lambda-cold-starts-all-wrong-7d907f278a4f

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https://hackernoon.com/im-afraid-you-re-thinking-about-aws-lambda-cold-starts-all-wrong-7d907f278a4f

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https://hackernoon.com/im-afraid-you-re-thinking-about-aws-lambda-cold-starts-all-wrong-7d907f278a4f

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https://hackernoon.com/im-afraid-you-re-thinking-about-aws-lambda-cold-starts-all-wrong-7d907f278a4f

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https://hackernoon.com/im-afraid-you-re-thinking-about-aws-lambda-cold-starts-all-wrong-7d907f278a4f

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https://hackernoon.com/im-afraid-you-re-thinking-about-aws-lambda-cold-starts-all-wrong-7d907f278a4f

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https://github.com/alexcasalboni/aws-lambda-power-tuning
 https://serverless.com/blog/aws-lambda-power-tuning/

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""" USE A SERVERLESS/LAMBDA CALCULATOR E.G. SERVERLESSCALC.COM

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AWS LIMITS KNOW THE LIMITS! (E.G. MAX CONCURRENT INVOCATIONS,
 PAYLOAD-SIZE, MEMORY-SETTINGS, ETC.) KNOW HOW TO INCREASE THE LIMITS!

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NETWORK & SECURITY VPC - VIRTUAL PRIVATE CLOUD Be careful! VPC requires Elastic Network Interfaces (ENIs). ENIs add some seconds(!!) to the cold start!

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API GATEWAY SECURITY AUTHENTICATION, AUTHORIZATION API-KEYS, USAGE PLANS, THROTTLING, ETC.

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TESTING DON’T! # LOCAL (UNIT) VS. CLOUD (INTEGRATION) AWS SAM Local, LocalStack

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BUILD & DEPLOYMENT (from: https://aws.amazon.com/codepipeline) AWS CODEPIPELINE Automated continuous integration and continuous delivery release workflow

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DEVOPS SERVERLESS IS NOT NO-OPS! NO OPS COST != NO COST OF OWNERSHIP! YOU ARE STILL RESPONSIBLE FOR THE (END) RESULTS KEEP DEVOPS IN MIND!

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MIGRATION TO SERVERLESS ‣ IDENTIFY THE PROBLEM ‣ TRAIN THE EXISTING TEAM ‣ CREATE A PROOF-OF-CONCEPT TO VERIFY THE PROBLEM IS SOLVED ‣ OPTIMIZE THE SOLUTION TO TAKE ADVANTAGE OF THE CLOUD ‣ AUTOMATE YOUR CONTINUOUS INTEGRATION/CONTINUOUS DEPLOYMENT PIPELINE ‣ AUTOMATE YOUR TESTING

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MIGRATION TO SERVERLESS 30 QUESTIONS TO ASK A SERVERLESS FANBOY HTTP://WWW.IHEAVY.COM/2017/03/13/30-QUESTIONS-TO-ASK-A-SERVERLESS-FANBOY/

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30 QUESTIONS TO ASK A SERVERLESS FANBOY HTTP://WWW.IHEAVY.COM/2017/03/13/30-QUESTIONS-TO-ASK-A-SERVERLESS-FANBOY/ MIGRATION TO SERVERLESS

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30 QUESTIONS TO ASK A SERVERLESS FANBOY HTTP://WWW.IHEAVY.COM/2017/03/13/30-QUESTIONS-TO-ASK-A-SERVERLESS-FANBOY/ MIGRATION TO SERVERLESS

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30 QUESTIONS TO ASK A SERVERLESS FANBOY HTTP://WWW.IHEAVY.COM/2017/03/13/30-QUESTIONS-TO-ASK-A-SERVERLESS-FANBOY/ MIGRATION TO SERVERLESS

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30 QUESTIONS TO ASK A SERVERLESS FANBOY HTTP://WWW.IHEAVY.COM/2017/03/13/30-QUESTIONS-TO-ASK-A-SERVERLESS-FANBOY/ MIGRATION TO SERVERLESS

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30 QUESTIONS TO ASK A SERVERLESS FANBOY HTTP://WWW.IHEAVY.COM/2017/03/13/30-QUESTIONS-TO-ASK-A-SERVERLESS-FANBOY/ MIGRATION TO SERVERLESS

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https://d1.awsstatic.com/whitepapers/serverless-architectures-with-aws-lambda.pdf

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THANK YOU. ANY QUESTIONS? Slides: bit.ly/sls-ll Niko Köbler | www.n-k.de | niko@n-k.de | @dasniko SERVERLESS - BEST PRACTICES & LESSONS LEARNED