deck

AWS Serverless Architecture

with Lambda

Serverless Pattern

EVENT SOURCE

FUNCTION

SERVICES

NODE

PYTHON

JAVA

STATE CHANGES

- RESOURCES

- DATA

ENDPOINT REQUESTS

Anatomy of a Lambda Function

'use strict';

// imports and dependencies

exports.handler = function (event, context) {
  context.done(null, "Hello World!");
};

Example - s3 PUT Event Object

{
  "Records": [
    {
      "eventVersion": "2.0",
      "eventTime": "1970-01-01T00:00:00.000Z",
      "requestParameters": {
        "sourceIPAddress": "127.0.0.1"
      },
      "s3": {
        "configurationId": "testConfigRule",
        "object": {
          "eTag": "0123456789abcdef0123456789abcdef",
          "sequencer": "0A1B2C3D4E5F678901",
          "key": "HappyFace.jpg",
          "size": 1024
        },
        "bucket": {
          "arn": bucketarn,
          "name": "sourcebucket",
          "ownerIdentity": {
            "principalId": "EXAMPLE"
          }
        },
        "s3SchemaVersion": "1.0"
      },
      "responseElements": {
        "x-amz-id-2": "EXAMPLE123/5678abcdefghijklambdaisawesome/mnopqrstuvwxyzABCDEFGH",
        "x-amz-request-id": "EXAMPLE123456789"
      },
      "awsRegion": "us-east-1",
      "eventName": "ObjectCreated:Put",
      "userIdentity": {
        "principalId": "EXAMPLE"
      },
      "eventSource": "aws:s3"
    }
  ]
}

Lambda Benefits

Simple Set-up
Low Learning-curve
Zero Administration
Easy Monitoring
Automatic Scaling
Only pay for use

AutoRenter on AWS

AutoRenter Spec

Auth

API

Compute

Database

API Gateway

Lambda

DynamoDB

Cognito

Serverless Architecture (with FaaS)

Client

What type of serverless architecture?

Nanoservices
Microservices
Monolith

Nanoservices

Microservices

Monolithic

Serverless Framework

npm i -g serverless
serverless create --template aws-nodejs
serverless deploy
serverless logs
serverless remove

Debugging

1. CloudWatch logs in the AWS console

2. CloudWatch logs from the AWS CLI

3. Third party logging software

eg Librato

sls logs -f hello -t

Unit Testing

// Use any unit testing framework

Zip and Upload, then Test
Command Line
Testing Frameworks (example)

Live Testing

CI/CD

Serverless Use Cases

Web Applications

Backends

Data Processing

Chatbots

Alexa

IT Automation

Contact

github: gwenf
twitter: gwen_faraday
email: gwenfaraday@gmail.com