Release Faster - Speaker Deck

Release Faster

by David Cramer

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RELEASE FASTER David Cramer twitter.com/zeeg Sunday, September 15, 13

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Sunday, September 15, 13

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I work on "Developer Productivity" Sunday, September 15, 13

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(No one knows what that means) Sunday, September 15, 13

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I also build Sentry Sunday, September 15, 13

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"How do we release faster?" Sunday, September 15, 13

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Continuous Deployment (n) Shipping new code as soon as it's ready Sunday, September 15, 13

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# Update the site every 5 minutes */5 * * * * cd /www/example.com \ && git pull \ && service apache restart Sunday, September 15, 13

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Continuous Deployment (n) Shipping new code as soon as it's ready Sunday, September 15, 13

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Review Integration Deploy Failed Build Reporting Rollback Commit Sunday, September 15, 13

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Better Testing Simplify Development Automate Releases Feature Gates Code Review Sunday, September 15, 13

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A Dropbox tale.. Sunday, September 15, 13

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"Go through these [extremely manual] instructions to setup a development VM" Sunday, September 15, 13

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Sunday, September 15, 13

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"Why don't we just use Vagrant?" Sunday, September 15, 13

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Optimize the Bootstrap Sunday, September 15, 13

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Bootstrap aﬀects newly hired developers Sunday, September 15, 13

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Bootstrap aﬀects rebuilding environments Sunday, September 15, 13

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Bootstrap aﬀects time to run tests Sunday, September 15, 13

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Bootstrap aﬀects our sanity Sunday, September 15, 13

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vagrant up ⇢ provision.sh Sunday, September 15, 13

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Remove Dependencies Sunday, September 15, 13

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You cannot reproduce your production environment Sunday, September 15, 13

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Stop Trying Sunday, September 15, 13

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Do you really need Apache? RTQDCDN[PQV Sunday, September 15, 13

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Do you really need HAProxy? UGTKQWUN[! Sunday, September 15, 13

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Do you really need RabbitMQ? JQYCDQWV4GFKU! Sunday, September 15, 13

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Do you really need Zookeeper? PQRG Sunday, September 15, 13

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Do you really need Hadoop? NQN Sunday, September 15, 13

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Do you really need Anything? Sunday, September 15, 13

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Utilize your build servers for complicated dependencies Sunday, September 15, 13

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Find Your Bottlenecks [QWRTQDCDN[FQP VPGGFC8/KH[QWJCXGGPIKPGGTU Sunday, September 15, 13

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Better Testing Simplify Development Automate Releases Feature Gates Code Review Sunday, September 15, 13

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Culture vs Tooling Sunday, September 15, 13

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Make Testing Easier Ensure you want to write tests Sunday, September 15, 13

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"Oh look, a test I can copy/paste" Sunday, September 15, 13

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Encourage building better testing tools and paradigms Sunday, September 15, 13

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pip install pytest Sunday, September 15, 13

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pip install ﬂake8 Sunday, September 15, 13

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pip install mock Sunday, September 15, 13

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Your goal is to make testing accessible Sunday, September 15, 13

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Automatically test individual commits to ensure every change is stable Sunday, September 15, 13

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Test Continuously Before code review (lint) Sunday, September 15, 13

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Test Continuously During code review Sunday, September 15, 13

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Test Continuously Post-code review (merge) Sunday, September 15, 13

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Optimize test execution time to deliver feedback ASAP Sunday, September 15, 13

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Sunday, September 15, 13

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Keep a tight Feedback Loop PQQPGYCPVUVQHKPFQWVVJGPGZVFC[VJCVVJGKTEQFGYCUDTQMGP Sunday, September 15, 13

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Prevent mistakes by blocking commits which fail the build cycle Sunday, September 15, 13

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Failed builds won't deploy Sunday, September 15, 13

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Failed builds won't merge Sunday, September 15, 13

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Better Testing Simplify Development Automate Releases Feature Gates Code Review Sunday, September 15, 13

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Mandatory Code Review Sunday, September 15, 13

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Sunday, September 15, 13

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Use Code Review to sanity check code Sunday, September 15, 13

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Use Code Review to inﬂuence testing culture Sunday, September 15, 13

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Use Code Review to educate developers Sunday, September 15, 13

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Use Code Review to decrease cycle time Sunday, September 15, 13

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"Does this change look sane?" Sunday, September 15, 13

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"No, this will break X, Y, and Z" FKF[QWGXGPMPQY:YCUCVJKPI! Sunday, September 15, 13

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Aim for Quality Patches Sunday, September 15, 13

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Changes happen outside of master causing master to be the new stable CMCVKRQTVTWPM Sunday, September 15, 13

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Better Testing Simplify Development Automate Releases Feature Gates Code Review Sunday, September 15, 13

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Choose your Audience Sunday, September 15, 13

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Releasing a feature internally can be as eﬀective as externally Sunday, September 15, 13

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Use feature gates to limit the audience your change aﬀects Sunday, September 15, 13

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Gargoyle at Disqus Sunday, September 15, 13

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from gargoyle import gargoyle def my_view(request): if gargoyle.is_active('awesome', request): return 'my new awesome feature' else: return 'boring old version' Sunday, September 15, 13

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Better Testing Simplify Development Automate Releases Feature Gates Code Review Sunday, September 15, 13

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Look at Heroku Sunday, September 15, 13

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$ heroku create sushi Creating sushi... done http://sushi.herokuapp.com/ | git@heroku.com:sushi.git $ git push heroku master ----> Heroku receiving push ----> Rails app detected ----> Compiled slug size is 8.0MB http://sushi.herokuapp.com deployed to Heroku Sunday, September 15, 13

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Continuous deployment is not deploying every commit Sunday, September 15, 13

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Focus on the ability to release every commit, not actually doing it Sunday, September 15, 13

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Review Integration Deploy Failed Build Reporting Rollback Commit Sunday, September 15, 13

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Stage Release TGNGCUGECPOGCPYJCVGXGTKVPGGFUVQYKVJKP[QWTQTICPK\CVKQP Sunday, September 15, 13