The Serverless PHP Application Rob Allen LaravelConf Taiwan 2020 - - PowerPoint PPT Presentation

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The Serverless PHP Application Rob Allen LaravelConf Taiwan 2020 - - PowerPoint PPT Presentation

Aug 30, 2022 481 likes •1.41k views

The Serverless PHP Application Rob Allen LaravelConf Taiwan 2020 Serverless? Rob Allen ~ @akrabat Platform options Rob Allen ~ @akrabat Platform options Rob Allen ~ @akrabat Platform options Rob Allen ~ @akrabat Platform options Rob

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The Serverless PHP Application

Rob Allen

LaravelConf Taiwan 2020

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Serverless?

Rob Allen ~ @akrabat

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Platform options

Rob Allen ~ @akrabat

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Platform options

Rob Allen ~ @akrabat

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Platform options

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Platform options

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Platform options

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Platform options

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Platform options

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Serverless

Serverless is all about composing software systems from a collection of cloud services. With serverless, you can lean on off-the-shelf cloud services resources for your application architecture, focus on business logic and application needs.

Nate Taggart, CEO Stackery

Rob Allen ~ @akrabat

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FaaS

Your code

Rob Allen ~ @akrabat

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FaaS

Deployed to the cloud

Rob Allen ~ @akrabat

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FaaS

Runs when needed

Rob Allen ~ @akrabat

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FaaS

Scaled automatically

Rob Allen ~ @akrabat

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FaaS

Pay only for execution

Rob Allen ~ @akrabat

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Where are the servers?

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Use-cases

Rob Allen ~ @akrabat

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Use-cases

Synchronous Service is invoked and provides immediate response (HTTP requests: APIs, chat bots)

Rob Allen ~ @akrabat

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Use-cases

Synchronous Service is invoked and provides immediate response (HTTP requests: APIs, chat bots) Asynchronous Push a message which drives an action later (web hooks, timed events, database changes)

Rob Allen ~ @akrabat

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Benefits

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Benefits

  • No need to maintain infrastructure

Rob Allen ~ @akrabat

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Benefits

  • No need to maintain infrastructure
  • Concentrate on application code

Rob Allen ~ @akrabat

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Benefits

  • No need to maintain infrastructure
  • Concentrate on application code
  • Pay only for what you use, when you use it

Rob Allen ~ @akrabat

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Benefits

  • No need to maintain infrastructure
  • Concentrate on application code
  • Pay only for what you use, when you use it
  • Language agnostic

Rob Allen ~ @akrabat

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Challenges

Rob Allen ~ @akrabat

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Challenges

  • Start up latency

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Challenges

  • Start up latency
  • Time limit

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Challenges

  • Start up latency
  • Time limit
  • State is external

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Challenges

  • Start up latency
  • Time limit
  • State is external
  • Different way of thinking

Rob Allen ~ @akrabat

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When should you use serverless?

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When should you use serverless?

  • Responding to web hooks

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When should you use serverless?

  • Responding to web hooks
  • Additional features without extending current platform

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When should you use serverless?

  • Responding to web hooks
  • Additional features without extending current platform
  • PWA/Static site contact form, et al.

Rob Allen ~ @akrabat

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When should you use serverless?

  • Responding to web hooks
  • Additional features without extending current platform
  • PWA/Static site contact form, et al.
  • Variable traffic levels

Rob Allen ~ @akrabat

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When should you use serverless?

  • Responding to web hooks
  • Additional features without extending current platform
  • PWA/Static site contact form, et al.
  • Variable traffic levels
  • When you want your costs to scale with traffic

Rob Allen ~ @akrabat

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It's about value

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Serverless platforms

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Serverless languages

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Serverless platforms with PHP support

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Hello World

AWS Lambda (Bref):

<?php require __DIR__ . '/vendor/autoload.php'; return function ($event) { $name = $event['name'] ?? 'world'; return 'Hello ' . $name; };

Rob Allen ~ @akrabat

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Hello World

Apache OpenWhisk:

<?php function main(array $args) : array { $name = $args['name'] ?? 'world'; return ["greeting" => 'Hello ' . $name]; }

Rob Allen ~ @akrabat

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Hello World

OpenFAAS

<?php class Handler { public function handle(string $data): void { $decoded = json_decode($data, true); $name = $decoded['name'] ?? 'world'; return 'Hello ' . $name; } }

Rob Allen ~ @akrabat

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Hello World

Google Cloud Functions (alpha)

<?php use Psr\Http\Message\ServerRequestInterface; function helloHttp(Request $request) { $name = $request->getQueryParams('name') ?? 'world'; return 'Hello ' . $name; }

Rob Allen ~ @akrabat

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Rob Allen ~ @akrabat

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The anatomy of an action

function main(array $args) : array { // Marshall inputs from event parameters $name = $args['name'] ?? 'world'; // Do the work $message = 'Hello ' . $name // Return result return ["body" => $message]; }

Rob Allen ~ @akrabat

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Hello World

function main(array $args) : array { // Marshall inputs from event parameters $name = $args['name'] ?? 'world'; // Do the work $message = 'Hello ' . $name // Return result return ["body" => $message]; }

Rob Allen ~ @akrabat

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Hello World

function main(array $args) : array { // Marshall inputs from event parameters $name = $args['name'] ?? 'world'; // Do the work $message = 'Hello ' . $name // Return result return ["body" => $message]; }

Rob Allen ~ @akrabat

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Hello World

function main(array $args) : array { // Marshall inputs from event parameters $name = $args['name'] ?? 'world'; // Do the work $message = 'Hello ' . $name // Return result return ["body" => $message]; }

Rob Allen ~ @akrabat

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Hello World

function main(array $args) : array { // Marshall inputs from event parameters $name = $args['name'] ?? 'world'; // Do the work $message = 'Hello ' . $name // Return result return ["body" => $message]; }

Rob Allen ~ @akrabat

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Deploy to OpenWhisk

$ zip -q hello.zip hello.php

Rob Allen ~ @akrabat

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Deploy to OpenWhisk

$ zip -q hello.zip hello.php $ wsk action update --kind php:7.3 hello hello.zip

  • k: updated action hello

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Run it

$ wsk action invoke hello --result --param name Rob

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Run it

$ wsk action invoke hello --result --param name Rob { "body": "Hello Rob!" }

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Under the hood

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OpenWhisk's architecture

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Create an action

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Invoke an action

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Action container lifecycle

  • Hosts the user-written code
  • Controlled via two end points: /init & /run

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Action container lifecycle

  • Hosts the user-written code
  • Controlled via two end points: /init & /run

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Architecture

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Monolith architecture

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Serverless architecture

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Serverless architecture pattern

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Functions are key

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Functions are the Unit of Deployment

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Functions are the Unit of Scale

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Functions are Stateless

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Functions have Structure

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Structure

If it's non-trivial, software engineering principles apply!

  • Use multiple methods

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Structure

If it's non-trivial, software engineering principles apply!

  • Use multiple methods
  • Use multiple files

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Structure

If it's non-trivial, software engineering principles apply!

  • Use multiple methods
  • Use multiple files
  • Integrate reusable dependencies

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Serverless state machines

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Serverless state machines

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Case study Project 365 photo website

Rob Allen ~ @akrabat

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Project 365

Static website to display my photo-a-day picture for each day of the year.

  • Hosted on S3
  • CloudFront CDN
  • Lambda/PHP function

Rob Allen ~ @akrabat

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Lambda/PHP function

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Infrastructure as code

functions: update: handler: index.php events:

  • schedule:

name: project365-build rate: cron(0 */2 * * ? *)

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Infrastructure as code

functions: update: handler: index.php events:

  • schedule:

name: project365-build rate: cron(0 */2 * * ? *)

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Infrastructure as code

functions: update: handler: index.php events:

  • schedule:

name: project365-build rate: cron(0 */2 * * ? *)

Rob Allen ~ @akrabat

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Process

  • 1. Gather credentials from environment
  • 2. Download photos from Flickr API
  • 3. Create HTML page
  • 4. Upload to S3
  • 5. Invalidate CloudFront cache

Rob Allen ~ @akrabat

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main()

function main(array $eventData) : array { $year = $eventData['year'] ?? date('Y'); $pageCreator = new PhotoPageCreator(); $html = $pageCreator->update($year); $uploader = new Uploader($cloudFrontId); $uploader->uploadOne($year, $html, $s3Bucket); $uploader->invalidateCache(['/'.$year]); }

Rob Allen ~ @akrabat

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main()

function main(array $eventData) : array { $year = $eventData['year'] ?? date('Y'); $pageCreator = new PhotoPageCreator(); $html = $pageCreator->update($year); $uploader = new Uploader($cloudFrontId); $uploader->uploadOne($year, $html, $s3Bucket); $uploader->invalidateCache(['/'.$year]); }

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main()

function main(array $eventData) : array { $year = $eventData['year'] ?? date('Y'); $pageCreator = new PhotoPageCreator(); $html = $pageCreator->update($year); $uploader = new Uploader($cloudFrontId); $uploader->uploadOne($year, $html, $s3Bucket); $uploader->invalidateCache(['/'.$year]); }

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main()

function main(array $eventData) : array { $year = $eventData['year'] ?? date('Y'); $pageCreator = new PhotoPageCreator(); $html = $pageCreator->update($year); $uploader = new Uploader($cloudFrontId); $uploader->uploadOne($year, $html, $s3Bucket); $uploader->invalidateCache(['/'.$year]); }

Rob Allen ~ @akrabat

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main()

function main(array $eventData) : array { $year = $eventData['year'] ?? date('Y'); $pageCreator = new PhotoPageCreator(); $html = $pageCreator->update($year); $uploader = new Uploader($cloudFrontId); $uploader->uploadOne($year, $html, $s3Bucket); $uploader->invalidateCache(['/'.$year]); }

Rob Allen ~ @akrabat

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The finished website

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Thank you!

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Photo credits

  • Assembly line: https://www.flickr.com/photos/adiram/3886212918
  • Under the hood: https://www.flickr.com/photos/atomichotlinks/7736849388
  • Pantheon: https://www.flickr.com/photos/shawnstilwell/4335732627
  • Watch mechanism: https://www.flickr.com/photos/shinythings/2168994732
  • Holiday snaps: https://www.flickr.com/photos/kjgarbutt/5358075923
  • Computer code: https://www.flickr.com/photos/n3wjack/3856456237
  • Stars: https://www.flickr.com/photos/gsfc/19125041621

Rob Allen ~ @akrabat