Serverless architecture

with AWS Lambda

What is serverless ???

What is serverless?

Run code without thinking of servers

• Event based
• Stateless
• Containerized
• Pay by usage
• Scalable
• Real time

Where?

• Google cloud functions
• Azure functions
• AWS Lambda

AWS Lambda

• Compute service
• Responds to events
• Handles:
  • Provisioning
  • Infrastructure
  • Scaling
  • Performance
• Pay for what you use

pricing

• # requests
  • 1,000,000 free requests per moth
  • $0.20 per 1m requests thereafter ($0.0000002 per request)
• Compute time
  • Units of 100ms
  • Depends on memory allocation 

pricing

code

• Run in C# / Node / Java / Python
• Use any library
• Uses docker in the background

integrations

• S3
• DynamoDB
• SES
• SNS
• Cognito
• CodeCommit
• ApiGateway
• ...

API

exports.handler = (event, context, callback) => {

    console.log('Received event:', JSON.stringify(event, null, 2));

    callback(null, event.key1);

};

Demo

Use cases

• REST API
• Generate a thumbnail when an image is uploaded to S3
• Monitor service
• Automated backups
• Create a custom Alexa skill 
• Slack plugin
• Handle SES bounces
• Create redirects
• Alarm actions
• ...

Downsides

• Cannot trigger different lambda with same event
• Not suitable for long pooling
• Weak control over environment
• Timeboxed
• Tricky to test

How WE use lambda

• Calculate PEinfo for S3 files
• Remove IP from security group when terminating EC2
• Add notification to statuspage.io when SQS size > 100

q&a?

you
are
awesome !!!