Serverless architecture

Michał KurzejaCTO w Accesto

PHP/Symfony

Wrocław Symfony Group

ITCorner tech meetup

Function as a service

“Serverless is a new cloud

computing trend that changes the way you think about writing and

maintaining applications.

auth0.com

“Deploy your applications as

independent functions, that respond to events, charge you only

when they run, and scale automatically.

serverless.com

“Serverless architectures refer to

(..) custom code that's run in ephemeral containers.

martinfowler.com

BaaSFaaS

FaaS

Trigger

External service

Function

No Disk

Access*almost

Statelessand share-nothing

Emphemeral

Easy Pricing Model

“GB-seconds”

= 890h

2.1mln requests

https://alestic.com/2016/12/aws-invoice-example/

https://www.trek10.com/blog/lambda-cost/

Amazon Ecosystem

◎API Gateway◎DynamoDB◎S3◎SQS ◎CloudFront◎Cognito◎...

Architectureexample architectural use-cases

Example

curl https://XXX.amazonaws.com/prod/helloworldHello from Lambda

curl https://XXX.amazonaws.com/prod/helloworld -d '{"name": "Michal"}' -XPOSTHello from Lambda to Michal

Ecosystemframeworks, libraries, implementations

Apex

Serverless

Claudia.js

OpenWhisk

Iron.io

Benefits

Easy to learn

Lower costs

Easy to scale

Reduced time to market

Microservice way

Fits into iterations

Drawbacks

Vendor lock-in*

Multitenancy

A bit harder to test locally

Communication overhead

Cold start

Not always cost-efficient

Good use-cases

Mostly static pageseven e-commerce ones

Data stream analysisExample: logs

Processing uploadsmaking thumbnails etc.

Actions users pay forPreparing watermarked ebook

My opinion?

What do YOU think?

Thanks!