Sep Nasiri "Upwork PHP Architecture"

Sep Nasiri "Upwork PHP Architecture"

• 1.
  Upwork PHP Architecture SepNasiri Software Architect at Upwork
• 2.
  Introduction ● Legacy Stack ●Challenges and reasons for modernization ● Overview of Upwork Architecture ● Focus on Presentation Tier and PHP
• 3.
  Legacy Stack ● PresentationLayer ○ PHP / Zend Framework ○ jQuery / Custom CSS ● Perl RPC Layer ● Both layers deployed to a cluster of App Servers ● Deployed in hardware in our data center
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  Problems with LegacyStack ● Infrequently releases ○ Weekly, then 3x a week ○ Release blockers - problems in one part of the application would block other teams features ● Aging codebase ○ frameworks getting out dated but hard to upgrade
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  Requirement for NewArchitecture ● Isolate risk ○ problems in one part of the application should not affect other parts ● Teams work in independent swimlanes ○ develop, test, and deploy independently ○ deploy features when ready ● Allow advanced deployment techniques ○ Automated ○ Blue/Green ○ Canary
• 6.
  New Backend Architecture- Agora ● Replace Perl Layer ● Java ● Microservices ● Netflix Open Source Software ○ Hystrix ○ Eureka ● AWS
• 7.
  Extending Microservices tothe Frontend - Agate ● Wanted to extend the benefits of Agora to the presentation tier. ● Spit up our PHP and client side code (JS, CSS, HTML) into independent units ● Challenges ○ Dealing with routing ○ Navigation / Header ○ Logging / Visibility
• 8.
  Agate Stack ● PHP/ Symfony 2 ● Angular JS ● Bootstrap
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  Agate Stack ● PHP/ Symfony2 ○ Lots of custom bundles ■ Distributed using Composer / Satis ● Component Library ○ Bootstrap ○ Angular ● Navigation Service
• 10.
  Talking to Agora- Phystrix ● Based on Netflix Hystrix ● Command Pattern ● Circuit breaker ○ prevent cascading failures ● Fallbacks Open Source - https://github. com/odesk/phystrix
• 11.
  Phystrix Example use OdeskPhystrixAbstractCommand; /** *All commands must extends Phystrix's AbstractCommand */ class MyCommand extends AbstractCommand { protected $name; public function __construct($name) { $this->name = $name; } /** * This function is called internally by Phystrix, only if the request is allowed * * @return mixed */ protected function run() { return 'Hello ' . $this->name; } }
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  Phystrix Example $myCommand =$phystrix->getCommand('MyCommand', 'Alex'); // 'Alex' is passed to MyCommand's constructor $result = $myCommand->execute();
• 13.
  Visibility ● Metrics ○ graphite ○metrics bundle ■ times actions ■ allows developers to add custom timers ● Logstash / Elasticsearch / Kibana ○ aggregate logs
• 14.
  Testing ● PHPUnit ● Mocha ○small test - karma ○ medium tests - protractor ● Jenkins ○ Docker build of each project ○ run tests in Docker
• 15.
  Planned improvements ● Dockerbased deployments ○ unify Agate and Agora deployment ● Continuous Integration / Delivery ○ improve our testing pipeline and Allow fully automated deployments ● Configuration with Consul to allow Docker images to move from dev to stage to prod
• 16.
  Thank You