nailing serverless application development€¦ · test locally test on dev cluster commit to repo...

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Sanath Kumar Ramesh Software Engineer, AWS Serverless

Nailing Serverless Application Development

☁ 🔨

@sanathkr_ @sanathkr


About Me

•  Obsessed about serverless developer tools since 2016 •  Built SAM, open sourced SAM implementation, and built SAM CLI •  Open source enthusiast •  Previously:

•  Full stack developer at startups •  Windows Kernel Engineer at Microsoft •  Designed multicore processors at grad school

•  To-be dad 👨‍👦

Sanath Kumar Ramesh, Software Engineer, AWS Serverless

@sanathkr_

@sanathkr


No servers to provision or manage

Scales with usage

Never pay for idle Availability and fault tolerance built in

Serverless means…


Common Serverless use cases

Web Applications •  Static

websites

•  Complex web apps

•  Packages for Flask and Express

Data Processing

•  Real time

•  MapReduce

•  Batch

Chatbots •  Powering

chatbot logic

Backends •  Apps &

services

•  Mobile

•  IoT

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Amazon Alexa

•  Powering voice-enabled apps

•  Alexa Skills Kit

IT Automation

•  Policy engines

•  Extending AWS services

•  Infrastructure management


SERVICES (ANYTHING)

Changes in data state

Requests to endpoints

Changes in resource state

EVENT SOURCE FUNCTION

Node.js Python Java C# Go

Serverless applications


The broader community has also evolved


Nailing Application Development

Source: https://gph.is/2xMjVvf


Building Web Applications

Develop Build Test Locally

Test on dev cluster

Commit to Repo

Deploy to Prod

Building Serverless Applications


Development workflow

is no different #ServerlessIsEasy



Test on dev cluster

Commit to Repo

Building a web app..

Non-Serverless Serverless

Deploy to Prod

Application Code

Infrastructure


MEAN Stack (Mongo Express Node Angular)


Test on dev cluster

Commit to Repo

Node: aws-serverless-express

Java: aws-serverless-java-container Python/Flask: Chalice Python/Django: Zappa



Deploy to Prod

Application Code

MEAN stack + Compatibility Converter




MEAN stack + New programming

model


Test on dev cluster

Commit to Repo


Deploy to Prod

Application Code




Test on dev cluster

Commit to Repo

exports.handler = function(event, context) { // Function Handler response = app.run(event) callback(null, response) }



Deploy to Prod

Application Code

MEAN stack + New programming

model

Immutable code Stateless

Event-driven


Focus on the business logic, use tools to help with serverless

#ServerlessIsEasy


Terraform

AWS CloudFormation

Terraform

AWS CloudFormation

AWS SAM Serverless Framework

Apex Sparta


Test on dev cluster

Commit to Repo



Deploy to Prod

Infrastructure


Meet SAM!


From: https://github.com/awslabs/aws-serverless-samfarm/blob/master/api/saml.yaml

<-THIS BECOMES THIS->

AWS SAM Template


Open Source SAM Toolset

SAM Implementation github.com/awslabs/serverless-application-model

SAM CLI github.com/awslabs/aws-sam-cli


Serverless specific tool will help, but not a necessity

#ServerlessIsEasy


Code +

Manifest +

Build Tool =

Deployment Bundle


Test on dev cluster

Commit to Repo



Code +

Manifest +

Build Tool with Serverless Build Plugins

= Deployment Bundle (.zip file)

Deploy to Prod


Code +

Manifest +

Build Tool =

Deployment Bundle


Test on dev cluster

Commit to Repo



pom.xml

Deploy to Prod


Your build tool might already support serverless

#ServerlessIsEasy


Manually Run Application Locally

Unit Tests

Integration Tests


Test on dev cluster

Commit to Repo




Unit Tests

Integration Tests

Deploy to Prod



Tools: Node Webserver, Nginx,

Apache Webserver etc


Test on dev cluster

Commit to Repo




with simulated cloud resources

Tools: SAM CLI, serverless-offline,

LocalStack

Deploy to Prod


Local testing is possible, a serverless tool just makes it

easier #ServerlessIsEasy


Create a dev cluster (usually one per team on

separate account)

Run Integration Tests


Test on dev cluster

Commit to Repo



Create a dev stack (one per developer on

separate account)

Run Integration Tests

Deploy to Prod



Test on dev cluster

Commit to Repo


Deploy to Prod



Test on dev cluster

Commit to Repo



Build ↓

Package ↓

Run Tests ↓

Beta, Gamma, Prod

Jenkins, AWS CodePipeline, AWS CodeBuild, CircleCI, etc

Deploy to Prod

$ sam deploy

Build ↓

Package ↓

Run Tests ↓

Beta, Gamma, Prod



Test on dev cluster

Commit to Repo



Canary or Blue/Green Deployments

Canary or Blue/Green Deployments

Deploy to Prod

sam.yaml



Test on dev cluster

Commit to Repo


Deploy to Prod


Your existing tools work just fine


If you can build software,

you can build on serverless

#ServerlessIsEasy


Thank You 👨‍💻 Questions?

@sanathkr_

@sanathkr

[email protected]


Serverless Application

LogicasConfigura.on(StepFunc.ons,APIGWetc)

Sta.cConfigura.on(S3,SQS,IAM)

Code(Java,Python,JSetc)

nailing serverless application development€¦ · test locally test on dev cluster commit to repo...

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