Serverless arhitektura: AWS Lambda i analogi

Serverless (FaaS) — model vypolneniya koda bez upravleniya serverami. Platforma masshtabiruet i billit po fakticheskomu ispolzovaniyu.

Kak rabotaet Serverless

• Kod upakovyvaetsya v funktsiyu
• Trigger (HTTP, sobytie, taymer) vyzyvaet funktsiyu
• Platforma sozdayot izolirovannoe okruzhenie
• Posle vypolneniya resursy osvobozhdayutsya

Cold Start Problem

Pervyy zapusk trebuet initsializatsii runtime:

• Python/Node.js: 100-300ms
• Java: 3-10 sekund
• Go/Rust: 10-50ms

Resheniya: Provisioned Concurrency, keep-alive zaprosy.

AWS Lambda

// Node.js Lambdaexports.handler = async (event) => {  return {    statusCode: 200,    body: JSON.stringify({ message: 'Hello from Lambda' }),  };};

Vercel/Netlify Functions

Zero-config serverless dlya frontend-razrabotchikov:

// api/hello.jsexport default function handler(req, res) {  res.status(200).json({ name: 'John Doe' });}

When to use Serverless

• Nepredskazuemaya nagruzka
• Mikroservisy
• Obrabotka sobytiy
• Scheduled tasks