I-Tier: Dismantling the Monolith Brian McCallister - - PowerPoint PPT Presentation

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I-Tier: Dismantling the Monolith Brian McCallister - - PowerPoint PPT Presentation

Aug 16, 2022 336 likes •854 views

I-Tier: Dismantling the Monolith Brian McCallister brianm@groupon.com @brianm 2012 North America CDN nginx Backend Rails DB Service Backend DB MySQL Service Cluster CDN nginx Rails Backend DB Service Backend DB

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I-Tier: Dismantling the Monolith

Brian McCallister

  • brianm@groupon.com

@brianm

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CDN nginx Rails MySQL Cluster Backend Service Backend Service DB DB

2012 North America

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Rails

CDN nginx MySQL Cluster Backend Service Backend Service DB DB

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SLIDE 4 0% 25% 50% 75% 100% North America January ‘11 January ‘13 October ’12 July ’12 April ’12 January ’12 October ‘11 July ’11 April ’11 March ‘13 June ‘13

Mobile Transaction Mix (% of transactions) Monthly, January 2011 to September 2013

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Rails MySQL Cluster Backend Service Backend Service DB DB API Web Mobile

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SLIDE 6 EU WebApp PostgreSQL Backend Service Backend Service DB DB EU API Web Mobile NA WebApp MySQL Cluster Backend Service Backend Service DB DB NA API Web Mobile
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Could not build features fast enough

  • Wanted to build features worldwide
  • Mobile and web lacked feature parity
  • Could not change look and feel!
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SLIDE 10 CDN nginx MySQL Cluster Backend Service Backend Service DB DB
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SLIDE 11 CDN nginx MySQL Cluster Backend Service Backend Service DB DB
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Subscribe Flow routing Rails MySQL Cluster Backend Service Backend Service DB DB API Web Config

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  • Language files blank comment code
  • CoffeeScript 10 88 251 203

make 1 12 18 25 Bourne Shell 1 1 2 5 Javascript 3 3 3 3 SASS 1 0 0 2

  • SUM: 16 104 274 238
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main: ( {attributes, renderCallback} ) -> # Presenter that sets the layout view = presenters.page 'subscribe', attributes # Grab the list of all the divisions grouponAPI.fetch { endpoint: 'divisions' }, (err, {divisions}, details) -> # If there’s an error, bail and pass the error along return renderCallback err if err?

  • divisionsPresenter = presenters.divisions divisions, {

currentDivision: attributes.query?.division_p }

  • # Add divisions to the page presenter

view.set { divisions: divisionsPresenter }

  • render.pageHtml view, renderCallback
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Within two hours we had a major site outage

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Subscribe Page grout Rails MySQL Cluster Backend Service Backend Service DB DB API Web Browse Page Config

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Subscribe Page grout Rails MySQL Cluster Backend Service Backend Service DB DB API Web Browse Page Config

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Subscribe Page grout Rails MySQL Cluster Backend Service Backend Service DB DB API Web Browse Page Config

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(cc) Newfrontiers http://flic.kr/p/9u346u

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Subscribe Page grout Rails MySQL Cluster Backend Service Backend Service DB DB API Web Browse Page Deal Page Layout Config

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SLIDE 29 Subscribe Page grout Rails MySQL Cluster Backend Service Backend Service DB DB API Web Browse Page Deal Page Layout Config Another Page More Page Yep Page Lots Page
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Subscribe Page grout Rails MySQL Cluster Backend Service Backend Service DB DB API Web Browse Page Deal Page Layout Config

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GET /layout/v3.8/gig_application_layout HTTP/1.1 Accept: */* Accept-Encoding: gzip, deflate, compress Host: uat.groupon.com User-Agent: HTTPie/0.7.2

  • HTTP/1.1 200 OK

Cache-Control: public, max-age=1800 Content-Encoding: gzip Content-Type: application/json; charset=utf-8 Date: Sun, 02 Mar 2014 18:31:01 GMT Transfer-Encoding: chunked

  • {

"templateName": “remote_gig_application_layout_main@v3_8”, "html": "<!DOCTYPE html>\n<!-- : gig_application_layout@v3.8.3 -- >\n<!--[if lt IE 7]> <html class=\"lt-ie10 lt-ie9 lt-ie8 lt- ie7\"{{#htmlAttr}} {{{htmlAttr}}}{{/htmlAttr}}> <![endif]-->\n<!--[if IE 7]> <html class=\"lt-ie10 lt-ie9 lt-ie8\"{{#htmlAttr}} {{{htmlAttr}}}{{/htmlAttr}}> <![endif]-->\n<!--[if IE 8]> <html class=\"lt-ie10 lt-ie9\"{{#htmlAttr}} {{{htmlAttr}}}{{/htmlAttr}}> <! [endif]-->\n<!--[if IE 9]> <html class=\"lt-ie10\"{{#htmlAttr}} {{{htmlAttr}}}{{/htmlAttr}}> <![endif]-->\n<!--[if gt IE 9]><!--> <html class=\"\"{{#htmlAttr}} {{{htmlAttr}}}{{/htmlAttr}}> "data": { … } }

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Finish It!

~2 months ~150 Developers

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Forward Looking Statements

A Tale of Two Monoliths

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Rails MySQL Cluster Backend Service Backend Service DB DB API Web Mobile

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SLIDE 44 EU WebApp PostgreSQL Backend Service Backend Service DB DB EU API Web Mobile NA WebApp MySQL Cluster Backend Service Backend Service DB DB NA API Web Mobile
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SLIDE 45 EU WebApp PostgreSQL Backend Service Backend Service DB DB EU API Web Mobile Subscribe Page grout Rails MySQL Cluster Backend Service Backend Service DB DB API Web Browse Page Deal Page Layout Config Another Page More Page Yep Page Lots Page

Europe North America

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SLIDE 46 /users/{user-id}/giftcodes /deals/{deal-id}/breakdowns.json /users/{user-id}/shipping_addresses /users/{user-id}/billing_records /deals/{deal-id} /users/{user-id}/orders/{order-id} … … … Legacy API Global API API Proxy
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SLIDE 47 /users/{user-id}/giftcodes /deals/{deal-id}/breakdowns.json /users/{user-id}/shipping_addresses /users/{user-id}/billing_records /deals/{deal-id} /users/{user-id}/orders/{order-id} … … … Legacy API Global API API Proxy Customer Facing Service
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SLIDE 48 Subscribe Page grout EU Webapp PostgreSQL Backend Service Backend Service DB DB EU API Web Browse Page Deal Page Layout Config Another Page More Page Yep Page Lots Page
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Thank You!

Brian McCallister

  • brianm@groupon.com

@brianm

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