Serverless and Software Craftsmanship

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SERVERLESS AND SOFTWARE CRAFTSMANSHIP

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WHO AM I Florian Motlik ‣Co-Founder and former CTO of Codeship ‣Former CTO of Serverless Inc AWS/Serverless/Development Process Consultant  Need help in your infrastructure: ﬂ[email protected] T W I T T E R : @ F L O M O T L I K W E B S I T E : T H E S E R V E R L E S S WAY. C O M E M A I L : F L O @ T H E S E R V E R L E S S WAY. C O M

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HOW TOOLING WILL MAKE OR BREAK SERVERLESS INFRASTRUCTURE

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LET’S FOCUS ON US TODAY

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On-Prem Virtual Cloud Servers Private Cloud Serverless Cloud-Native

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PAST SERVER SERVER SERVER SERVER SERVER SERVER SERVER SERVER SERVER SERVER SERVER SERVER

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PAST SERVER SERVER SERVER SERVER SERVER SERVER SERVER SERVER SERVER SERVER SERVER SERVER Application cluster Database cluster Data and ETL Pipeline

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SERVERLESS INFRASTRUCTURE Service A F1 F2 F3 Service C F1 F2 Service B F1 Service E F1 F2 F3 Service D F1 F2 F3 F4 F5 S3 Kinesis DynamoDB Api Gateway Server ECS Cluster C1 C2 C3

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WHY ARE WE DOING THIS?

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WELL, PRODUCTIVITY

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WHAT IS PRODUCTIVITY?

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EFFICIENTLY IMPLEMENTING THE MOST EFFECTIVE SOLUTION FOR OUR CUSTOMERS

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SHITTY QUALITY ISN’T EFFECTIVE OR EFFICIENT

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FIREFIGHTING IS NOT PRODUCTIVE WORK

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OK SO EFFECTIVENESS?

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HOW CAN WE BE EFFECTIVE ▸ Understanding our Customers ▸ Working with them to continuously understand their needs ▸ Having the time to do it!

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OK SO WHAT ABOUT EFFICIENCY?

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MAKE GOOD STUFF HAPPEN FAST OVER A LONG TIME

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SO HOW DOES SOFTWARE CRAFTSMANSHIP APPLY HERE?

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MANIFESTO FOR SOFTWARE CRAFTSMANSHIP ▸ Not only working software, but also well-crafted software ▸ Not only responding to change, but also steadily adding value ▸ Not only individuals and interactions, but also a community of professionals ▸ Not only customer collaboration, but also productive partnerships      http://manifesto.softwarecraftsmanship.org/

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WE ARE TIRED OF WRITING CRAP!

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WHAT THAT MEANS FOR CODE ▸ Well written code ▸ Well tested code ▸ Well documented (where necessary) code ▸ Easy to change ▸ …

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INFRASTRUCTURE IS NOW PART OF OUR CODE

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OUR INFRASTRUCTURE IS AN EXTENSION OF OUR CODE Service A F1 F2 F3 Service C F1 F2 Service B F1 Service E F1 F2 F3 Service D F1 F2 F3 F4 F5 S3 Kinesis DynamoDB Api Gateway Server ECS Cluster C1 C2 C3

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IT’S ALL ABOUT THE GLUE

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WHAT THAT MEANS FOR INFRASTRUCTURE ▸ Well automated infrastructure ▸ Well monitored infrastructure ▸ Well operated infrastructure ▸ Well documented (where necessary) infrastructure ▸ Easy to change ▸ …

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EQUALLY IMPORTANT TO THE QUALITY OF OUR CODE

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AND WE ARE RESPONSIBLE FOR IT

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NOT JUST DIFFERENT TOOLING, BUT DIFFERENT WAY TO WORK

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PAST SERVER SERVER SERVER SERVER SERVER SERVER SERVER SERVER SERVER SERVER SERVER SERVER Application cluster Database cluster Data and ETL Pipeline

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SERVERLESS INFRASTRUCTURE Service A F1 F2 F3 Service C F1 F2 Service B F1 Service E F1 F2 F3 Service D F1 F2 F3 F4 F5 S3 Kinesis DynamoDB Api Gateway Server ECS Cluster C1 C2 C3

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AND ITS GETTING MORE COMPLICATED

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NEW FEATURES COME IN ALL THE TIME AND WE HAVE TO DEAL WITH IT

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SERVICES BECOME EASIER TO USE THOUGH

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HEAVY TECH LIFTING IS DONE BY SERVICE PROVIDER

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OUR JOB IS TO GLUE IT TOGETHER

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SKILLS WE NEED TO GLUE IT TOGETHER

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SKILLS WE NEED TO BE CAPABLE OF ▸ Insight ▸ Resource Management ▸ Authorisation ▸ Monitoring ▸ Operations

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HOW FAST CAN YOU LEARN STUFF ABOUT YOUR DEPLOYED RESOURCES INSIGHT

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INSIGHT >3 Seconds is a Problem

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CREATING AND UPDATING RESOURCES IN SERVICES IN THE CLOUD RESOURCE MANAGEMENT

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RESOURCE MANAGEMENT ▸ Automation ▸ Automation ▸ Automation ▸ Automation ▸ Automation ▸ And Yes, Automation

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IT'S AUTOMATED, THEREFORE IT IS!

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LEAST PRIVILEGE IS CORRECT PRIVILEGE AUTHORISATION

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IAM REALLY ISN’T THAT COMPLEX

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WTF IS GOING ON HERE? MONITORING

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HOW DO I FIX THIS? OPERATIONS

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WHAT DO I NEED TO LEARN ON AWS?

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AWS CORE SERVICES AND TOOLS ▸ AWS CLI ▸ CloudFormation ▸ IAM ▸ CloudWatch

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INSIGHT AWS CLI

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AUTOMATION CLOUDFORMATION

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AUTHORISATION IAM

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MONITORING AND OPERATIONS CLOUDWATCH

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THE CLOUD IS STANDARDISED, SO CUSTOMISE YOUR TOOLS

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BASIC SHELL TOOLING ▸ Make ▸ xargs ▸ JQ ▸ Sed ▸ AWK

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WHY CAN’T I LEAVE THIS TO SOME SMART TOOL?

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NEW FEATURES COME IN ALL THE TIME AND WE HAVE TO DEAL WITH IT

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DOESN’T MEAN YOU CAN’T USE HIGH LEVEL TOOLS

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TOOLING IS MORE POWERFUL THAN EVER

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SO WHERE DO I START TO LEARN THIS?

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AWS DOCUMENTATION ISN’T AS COMPLEX AS IT SEEMS

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THESERVERLESSWAY.COM

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GUIDES ▸ Serverless ▸ AWSCli ▸ CloudFormation ▸ IAM ▸ More to come…

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THE SERVERLESS WAY TOOL SUITE ▸ Formica - CloudFormation client ▸ AWSInfo - The AWS Console in your terminal ▸ AWSIE - CloudFormation aware AWS CLI Wrapper ▸ Former - The easiest way to get CloudFormation Resource deﬁnitions ▸ More to come…

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CONCLUSIONS ▸ Learn the AWS Core Services and Tools ▸ Custom tools for standard infrastructure components ▸ Think about your own productivity as a Serverless developer ▸ Don’t build crap ▸ Check out theserverlessway.com ▸ Join the Serverless-Forum on Slack (https://wt-serverless- seattle.run.webtask.io/serverless-forum-signup?webtask_no_cache=1)

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THANK YOU Florian Motlik Questions? AWS/Serverless/Development Process Consultant  Need help in your infrastructure: ﬂ[email protected] T W I T T E R : @ F L O M O T L I K W E B S I T E : T H E S E R V E R L E S S WAY. C O M E M A I L : F L O @ T H E S E R V E R L E S S WAY. C O M

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FURTHER READING ‣ https://martinfowler.com/bliki/CraftmanshipAndTheCrevasse.html ‣ http://blog.cleancoder.com/uncle-bob/2011/01/17/software-craftsmanship-is- about.html ‣ https://dannorth.net/2011/01/11/programming-is-not-a-craft/ ‣ http://blog.gdinwiddie.com/2011/01/17/trades-crafts-and-certiﬁcation/