AWS Immersion Day

Published on Wednesday, June 05, 2019

Notes from Flatiron School engineering team’s training day with AWS.

Serverless Transformation

AWS Serverless Foundations (Deep dive into Lambda and API Gateway)

Presenters:

  • Pranusha Manchala
  • Ramesh Jetty

Why serverless? Spend more time on your app, not maintaining servers.

“No server is easier to manage than no server” #nocode

How does it work?

Event source => Function => Services

Common use cases

  1. Web apps
    • static websites
    • complex apps
    • packages for Flask, Express
  2. Backends
    • mobile
    • IoT
    • apps
    • services
  3. Data processing
    • real time
    • MapReduce
    • Batch
  4. Chatbots
  5. AWS Alexa
  6. Autonomous IT
    • policy engines
    • extending AWS services
    • infrastructure management

AWS Lambda

  • Stateless
  • Memory allocation: 128 MB to 30008 MB (!!) in 64 MB increments
  • Function timeout 15min
  • Synchronous or async
  • Author with Cloud9
  • Logs to CloudWatch
Permissions
  • Execution policies
    • what can this function access?
  • Function policies
    • who can invote the function?
  • Resource policies
    • cross account access

Lab: Build a dynamic, serverless web application

WildRydes

https://github.com/aws-samples/aws-serverless-workshops/tree/master/WebApplication/

Building Security at multiple layers of the application (Cognito deep dive)

API Gateway

Three types of authorization:

  • Cognito User Pools => Cognito Authorizers
  • Cognito Identity Pools => AWS IAM authorization
  • Custom Providers => Lambda Authorizers

Cognito

  • Cognito User Pools
    • doesn’t store user info
    • supports Oauth2.0 and OpenID Connect tokens
    • supports federation
  • Cognito Identity Pools
    • supports federation

Lab: Integrate AWS Amplify with Amazon Cognito, Amazon API Gateway, AWS Lambda, and IAM to provide an integrated authentication and authorization experience

https://github.com/aws-samples/aws-serverless-workshops/tree/master/Auth

AWS services and features you can leverage to improve the security of a serverless applications

Shared Responsibility Model of AWS: shared between AWS and customer

  • AWS responsible for security in the cloud
  • Customer responsible for security outside the cloud
    • five domains listed below
    • examples: db, s3 buckes, code, etc

5 domains (and services available):

  • Identity & access management
    • Cognito
    • API Gateway
  • Infrastructure
    • DDOS protection
      • AWS Shield
      • AWS WAF
    • Throttling/rate limiting
      • API Gateway
      • AWS Lambda
    • Network boundaries
      • API Gateway
      • AWS Lambda
  • Data
    • Classification
      • Amazon Macie
    • Data flow
      • AWS X-Ray
    • Encryption
      • AWS KMS
      • API Gateway
      • Amazon Certificate Manager
    • Backup/replication
      • DynamoDB
      • S3
      • RDS
    • Tokenization
      • AWS Marketplace
  • Code
    • AWS WAF
    • AWS Gateway
    • AWS Lambda
    • AWS Secrets Manager
    • Systems Manager Parameter Store
  • Logging & monitoring
    • Logging/tracing
      • API Gateway
      • AWS Lambda
      • X-Rays
    • Metrics
      • API Gateway
      • AWS Lambda
    • Compliance validation
      • AWS Config
      • CloudWatch events
      • AWS Budgets

Vulnerability dependency check tools:

  • OWASP
  • Snyk
  • Twistlock
  • Puresec
  • Protego

Lab: Security Workshop

https://github.com/aws-samples/aws-serverless-security-workshop