Building Everything on Serverless

by Noah Bass

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@n_bass Building Everything on Serverless

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@n_bass λ

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@n_bass Cloud App / Hobby Projects Enter Serverless + Serverless Compute Examples Under the Hood AWS Lambda Serverless Framework Live Demo

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@n_bass How do you write + run cloud apps?

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@n_bass Code Test Deploy Monitor Provision Infrastructure

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@n_bass Your Code! Virtual Machine (or maybe PaaS) ? Your Code! Database/Datastore Logs Cron HTTP/S SSH

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@n_bass Infrastructure and Management

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@n_bass Infrastructure and Management

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@n_bass Infrastructure is an implementation detail.

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@n_bass Developers should care about only their code.

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@n_bass Drop the infrastructure.

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@n_bass Code Test Deploy Monitor Provision Infrastructure

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@n_bass Idle Code == Idle Servers

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@n_bass Serverless?

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@n_bass HTTP API for Web/Mobile App HTTPS Trigger Event Your Code! Function Database/ Datastore Services Other Functions, APIs APIs Logs, … Monitoring

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@n_bass Serverless == BaaS

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@n_bass Serverless Compute == FaaS

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@n_bass Serverless Function

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@n_bass Serverless (BaaS) Serverless Compute (FaaS) Serverless Function

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@n_bass Serverless is another abstraction.

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@n_bass FaaS PaaS IaaS

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@n_bass But there are servers?!?!?!

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@n_bass Good Use Cases

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@n_bass HTTP API for Web/Mobile App HTTPS Call Event Your Code! Function Database/ Datastore Service

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@n_bass Example: ACM@UC Slack Badge

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@n_bass Scheduled Event Event Your Code! Function Messaging, Reporting, etc. API Automated Tasks Data API

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@n_bass New Image/ Video in S3 Bucket Event Your Code! Function S3 Bucket Service Image and Video Resizing

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@n_bass Bad Use Cases Persistent Connections, State Sharing

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@n_bass Building Everything on Serverless

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@n_bass Building Everything on Serverless Some Things

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@n_bass Containers

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@n_bass Simple Function: Availability Event Instance Function HTTPS GET Instance Instance Instance https://martinfowler.com/articles/serverless.html

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@n_bass Containers Package code into an image that can be run (almost anywhere)

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@n_bass Container Reuse aws.amazon.com/blogs/compute/container-reuse-in-lambda/

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@n_bass

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@n_bass HTTP Call Event Stream S3 Bucket Database Queue (SQS) Logs And more…

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@n_bass Cost Serverless Computing for College Students?

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@n_bass $ = Number Requests + Compute Time (gb-sec)

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@n_bass Pricing on AWS Lambda • $0.2 per 1 million requests • $0.00001667 per gb-sec

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@n_bass Sample Function 1 million requests  800ms per request  256mb (0.25gb) memory -> $0.2 -> 1M * 0.8sec -> 0.8M sec -> 0.8M sec * 0.25gb = 200,000 gb-sec  200,000 * $0.00001667 = $3.34  Total = $0.2 + $3.34 = $3.54/month

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@n_bass AWS Free Tier aws.amazon.com/free/

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@n_bass λ

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@n_bass Serverless Framework (serverless.com)

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@n_bass Serverless != Serverless Framework

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@n_bass

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@n_bass Serverless Framework is Cloud Agnostic

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@n_bass Why A Framework?

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@n_bass Live Demo

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@n_bass Simple HTTP Endpoint (hello world) Event Our Code! Respond 200 OK Function HTTPS GET

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@n_bass Scheduled Event: Weather Report Scheduled Event (1d) Event Our Code! Get data, then send email Function darksky.net API API AWS SES API

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@n_bass Building Some Things on Serverless

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@n_bass Resources • serverless.com • serverless.com/framework/docs/providers/aws/guide/quick-start/ • aws.amazon.com/lambda • aws.amazon.com/free • cloud.google.com/free • github.com/serverless/examples • github.com/anaibol/awesome-serverless • martinfowler.com/articles/serverless.html • www.youtube.com/watch?v=Y6B3Eqlj9Fw • github.com/openfaas/faas