Serverless Architecture Overview in December 2016.

1. Serverless
Architecture
Ladislav Prskavec
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2. Serverless is a hot topic in the software
architecture world.
— Mike Roberts
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3. Is Serverless
buzzword?
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4. Backend as a Service
and
Function as a Service
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5. Backend as a Service (BaaS)
» Firebase - DB + Auth
» Hoodie - Offline first, PouchDB
» Algolia - Search
» Auth0 - SSO, Token Based Auth
» Kinvey - Mobile Backend as Service
» Syncano - Assemble your backend
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6. Function as a Service (FaaS)
» Amazon Lambda & API Gateway (Nov'14)
» IBM Bluemix Openwhisk (Feb'16)
» Google Cloud Functions (Feb'16)
» Azure Functions (Mar'16)
» Webtask.io (Mar'15)
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7. Amazon Lambda
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8. Amazon Lambda - Inputs
» Event Source
» API Gateway
» S3
» Kinesis
» DynamoDB
» AWS Config
» Amazon Cognito
» AWS CloudFormation
» ...
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9. Amazon Lambda - Processing
» Compute Service
» Languages (NodeJS 0.10 and 4.3, Java, Python, C#)
» Security Model (IAM, VPC)
» Cascading (AWS Step Functions)
» Run code at any scale
» Charged on execution scale
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10. Amazon Lambda - Outputs
» Event
» Storage
» Messaging
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11. Cost effective
Scenario - 16k req/day @ 200ms avg = 3200 s/day
$2.97/day - 2 EC2 instances (upfront)
$0.05/day - Lambda (1GB)
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12. AWS Serverless Application
Model (AWS SAM)
» https://github.com/awslabs/serverless-application-model
» AWS SAM is a model used to define serverless applications on
AWS.
» Specification
» AWS SAM is based on AWS CloudFormation.
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13. AWSTemplateFormatVersion: '2010-09-09'
Transform: 'AWS::Serverless-2016-10-31'
Resources:
MyFunction:
Type: 'AWS::Serverless::Function'
Properties:
Handler: index.handler
Runtime: nodejs4.3
CodeUri: 's3://my-bucket/function.zip'
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14. Amazon States Language
» Specification
» Linter - https://github.com/awslabs/statelint
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15. {
"Comment": "A Retry example of the Amazon States Language using an AWS Lambda Function",
"StartAt": "HelloWorld",
"States": {
"HelloWorld": {
"Type": "Task",
"Resource": "arn:aws:lambda:us-east-1:123456789012:function:FailFunction",
"Retry": [
{
"ErrorEquals": ["HandledError"],
"IntervalSeconds": 1,
"MaxAttempts": 2,
"BackoffRate": 2.0
},
{
"ErrorEquals": ["States.TaskFailed"],
"IntervalSeconds": 30,
"MaxAttempts": 2,
"BackoffRate": 2.0
},
"ErrorEquals": ["States.ALL"],
"IntervalSeconds": 5,
"MaxAttempts": 5,
"BackoffRate": 2.0
}
],
"End": true
}
}
}
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16. Frameworks
» Chalice
» Apex
» Serverless
» Zappa
» Sparta
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17. Chalice
» Python
» https://github.com/awslabs/chalice
» microframework
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18. Apex - http://apex.run
» in golang support nodejs, golang, python, java
» optional terraform support
» multiple deployment targets for different environments
» idempotent deployments
» author @tjholowaychuk
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19. Serverless - http://www.serverless.com
» in NodeJS, actual version 1.3.0
» support aws-nodejs, aws-python, aws-java-gradle, aws-java-
maven, aws-scala-sbt, aws-csharp
» config in serverless.yml
» support env variables (support added into Lambda in
November'16)
» AWS CloudFormation
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20. Zappa - https://zappa.gun.io
» in Python support Python
» https://github.com/Miserlou/lambda-packages
» https://github.com/Miserlou/django-zappa
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21. Sparta - http://gosparta.io
» in Golang support Golang
» CloudFormation
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22. Libraries and utils
» claudiajs
» aws-serverless-express
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23. ClaudiaJS
» NodeJS
» Claudia is not trying to change the way you structure or run
projects.
» Deployment utility
» https://github.com/claudiajs/claudia
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24. AWS Serverless Express
» extends ExpressJS
» NodeJS 4.3 LTS
» https://github.com/awslabs/aws-serverless-express
» cannot use native packages
» currently no support for binary data (AWS Gateway have
support from Nov'16)
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25. Security
» https://github.com/vandium-io/vandium-node
» Powerful input validation, Forces values into correct types
» JSON Web Token (JWT) verification and validation
» Cross Site Request Forgery (XSRF) detection when using JWT
» SQL Injection (SQLi) detection and protection
» Environment variable mapping,
» Free resources post handler execution
» Handles uncaught exceptions
» Promise support
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26. Testing
» https://github.com/lambci/docker-lambda/
» Docker images and test runners that replicate the live AWS
Lambda environment
» NodeJS 0.10/4.3
» Python
» Java8
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27. Architectures
examples
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36. API Gateway & Lambda problems
» limit 6MB on Lambda response
» API Gateway don't support gzip
» problems with with strange 500 errors without
» not parsable error object from Lambda into API Gateway
» API Gateway template system (based on Velocity templates)
» problem with local testing API Gateway
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37. Q & A
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38. re:Invent 2016 sessions
» Videos - https://gist.github.com/stevenringo/
5f0f9cc7b329dbaa76f495a6af8241e9
» Slides - http://www.slideshare.net/AmazonWebServices/
tagged/reinvent2016
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39. Resources
» https://aws.amazon.com/lambda/
» https://github.com/anaibol/awesome-serverless
» https://cloudcraft.co
» https://github.com/lambci/docker-lambda/
» http://www.allthingsdistributed.com/2016/05/aws-lambda-serverless-reference-
architectures.html
» https://www.thoughtworks.com/radar/techniques/serverless-architecture
» https://serifandsemaphore.io/azure-cloud-functions-vs-aws-lambda-
caf8a90605dd#.dbk2yntw1
» https://github.com/donnemartin/awesome-aws
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