[AWS] What’s serverless? This is Lambda.

What’s serverless?
• Serverless is a new paradigm in which the developers don’t have to manage servers anymore…
• They just deploy code
• They just deploy… functions!
• Initially… Serverless == FaaS (Function as a Service)
• Serverless was pioneered by AWS Lambda but now also includes anything that’s managed: “databases, messaging, storage, etc.”
• Serverless does not mean there are no servers… it means you just don’t manage / provision / see them

Serverless in AWS
• AWS Lambda
• DynamoDB
• AWS Cognito
• AWS API Gateway
• Amazon S3
• AWS SNS & SQS
• AWS Kinesis Data Firehose
• Aurora Serverless
• Step Functions
• Fargate

Why AWS Lambda

• Virtual Servers in the Cloud
• Limited by RAM and CPU
• Continuously running
• Scaling means intervention to add/remove servers

• Virtual functions – no servers to manage!
• Limited by time – short executions
• Run on-demand
• Scaling is automated!

Benefits of AWS Lambda
• Easy Pricing
• Pay per request and compute time
• Free tier of 1,000,000 AWS Lambda requests and 400,000 GBs of compute time
• Integrated with the whole AWS suite of services
• Integrated with many programming languages
• Easy monitoring through AWS CloudWatch
• Easy to get more resources per functions (up to 1OGB of RAM!)
• Increasing RAM will also improve CPU and network!

AWS Lambda language support
• Node.js (JavaScript)
• Python
• Java (Java 8 compatible)
• C# (.NET Core)
• Golang
• C# / Powershell
• Ruby
• Custom Runtime API (community supported, example Rust)
• Lambda Container Image
• The container image must implement the Lambda Runtime API
• ECS / Fargate is preferred for running arbitrary Docker images

AWS Lambda Integrations Main ones