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Scaling Deployment at Etsy
 

Scaling Deployment at Etsy

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How deployment is tackled at Etsy and how we keep it fast and scale it out with a growing engineering team. ...

How deployment is tackled at Etsy and how we keep it fast and scale it out with a growing engineering team.

Reprised version of the talk given at the Continuous Delivery NYC meetup October 2013.

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    Scaling Deployment at Etsy Scaling Deployment at Etsy Presentation Transcript

    • Scaling Deployment at Etsy Daniel Schauenberg dschauenberg@etsy.com @mrtazz Thursday, October 10, 13
    • Thursday, October 10, 13
    • August 2013 •1.8 billion page views •5,483,399 items sold •$109.1 million of goods sold •> 30 million members •> 1 million active shops http://www.etsy.com/blog/news/2013/etsy-statistics-august-2013-weather-report/ | Items by RockerDollJewellery, ZulamimiLand, codice, 42Things Thursday, October 10, 13
    • LAMMP Item by TheBackPackShoppe Thursday, October 10, 13
    • Item by FrankelPhotos Monolithic App Thursday, October 10, 13
    • No Branching Item by NurseryWallArt Thursday, October 10, 13
    • Deploy Frequency Thursday, October 10, 13
    • First Day Item by flowersandfleurons Thursday, October 10, 13
    • Thursday, October 10, 13
    • IRC Thursday, October 10, 13
    • Thursday, October 10, 13
    • DeveloperVMs •KVM •Dev version of full Etsy stack •Chef •DevTools Thursday, October 10, 13
    • Thursday, October 10, 13
    • Item by codecards Thursday, October 10, 13
    • % review -r dschauenberg Thursday, October 10, 13
    • automatically assignedautomatically assigned Thursday, October 10, 13
    • Try Item by CSSDesign Thursday, October 10, 13
    • Actually ... Thursday, October 10, 13
    • The Bobs Item by Signz Thursday, October 10, 13
    • The Bobs •LXC containers on buildtests •Multiple SSDs •Labels for heavy/any execution •One heavy executor per disk Thursday, October 10, 13
    • CI/Try •~260 Bobs •Mostly for try •Constant monitoring for slow tests Thursday, October 10, 13
    • push train Item by decomodwalls Thursday, October 10, 13
    • #push •IRC channel to organize push trains •Join a train if you want to deploy changes •Schedule is planned via the channel topic •First in the train is the driver (controls the deploy) •Opening hours: 7am - 10pm NYC time Thursday, October 10, 13
    • #push <prod> kseever* + jameslee | jpaul | DanielConvissor (c) Thursday, October 10, 13
    • #push bateman* + krunal* + enorris* | tristan (c) + jameslee (c) + jlaster (c) | dawa + corey + sandosh + jklein + magera + seth_home + mpascual + nathan | bateman | russp (c) Thursday, October 10, 13
    • pushbot •.join •.in •.good •.done Thursday, October 10, 13
    • pushbot Thursday, October 10, 13
    • Item by EsalonPhotography Thursday, October 10, 13
    • Deployinator Thursday, October 10, 13
    • Thursday, October 10, 13
    • Thursday, October 10, 13
    • stale commits Thursday, October 10, 13
    • version checks buttons disabledbuttons disabled Thursday, October 10, 13
    • version checks Thursday, October 10, 13
    • lock down deploys Thursday, October 10, 13
    • https://github.com/etsy/deployinator Thursday, October 10, 13
    • Downsides •Deploys not atomic on the request level •Limbo during the time of the local rsync •Common strategy was to split commits into 3 deploys Thursday, October 10, 13
    • Item by Geographicsart Thursday, October 10, 13
    • Atomic Deploys Thursday, October 10, 13
    • Basic Idea Yin Yang Active Docroot Thursday, October 10, 13
    • Basic Idea Yin Yang Active Docroot rsync Thursday, October 10, 13
    • Basic Idea Yin Yang Active Docroot Thursday, October 10, 13
    • Basic Idea Yin Yang Active Docroot Thursday, October 10, 13
    • Problems •Symlink swap during requests •Code needs to be guaranteed to finish on the docroot it started •Code inclusion mid request Thursday, October 10, 13
    • etsy/mod_realdoc •Apache post_read_request hook •Whole request works on realpath of docroot •Caches realpath for 2s Thursday, October 10, 13
    • ini_set('include_path', $_SERVER['DOCUMENT_ROOT'].'/../include'); Thursday, October 10, 13
    • etsy/incpath •PHP module to set the incpath •Gets docroot from Apache or realpath() itself •Looks for a pattern to replace in include_path •Restores include_path at the end of the request Thursday, October 10, 13
    • What did we get? •Remove functions and call site in same deploy •No restarts necessary •Opcode caches stay warm for files that don’t change between 2 deploys Thursday, October 10, 13
    • Things to watch out for •Code that uses full path names to scripts •Atomic symlink swapping with `mv -T` •Realpath caching to not stress the filesystem •Opcode cache needs to fit 2x code size •Only request atomicity Thursday, October 10, 13
    • The Plateau Item by finandfancy Thursday, October 10, 13
    • The Plateau •Regular deploys took ~15 mins •Config deploys about half •10am - 6pm => ~ 32 deploys •Long waiting times Thursday, October 10, 13
    • Item by KlaireWarren Thursday, October 10, 13
    • Waiting for push queueWaiting for push queue Thursday, October 10, 13
    • Split The Queues Item by KlaireWarren Thursday, October 10, 13
    • HELLO SPLIT QUEUESHELLO SPLIT QUEUES Thursday, October 10, 13
    • Dashboards deploy linesdeploy lines Thursday, October 10, 13
    • Supergrep Thursday, October 10, 13
    • Thursday, October 10, 13
    • Summary •Current setup has scaled to ~150 people •Constantly trying to improve the speed of deployment •Find weak parts in the process and make them more robust/faster •Bring Dev closer to Prod •Not being able to deploy has the same status as the site being down Thursday, October 10, 13
    • codeascraft.etsy.com www.etsy.com/codeascraft/talks etsy.github.com www.etsy.com/careers Thursday, October 10, 13
    • Questions? Thursday, October 10, 13
    • Scaling Deployment at Etsy Daniel Schauenberg dschauenberg@etsy.com @mrtazz Thursday, October 10, 13