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CONTINUOUS DEPLOYMENT Keith & Mario’s Guide To @keithpitt @mariovisic OR Why automatically deploying your master branch to production is a good idea.
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Keith and Mario’s Guide to FAST WEBSITES @keithpitt @mariovisic Previously…
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microlancer
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Desktoppr
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ALRIGHT, LISTEN UP
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WHY CONTINUOUS DEPLOYMENT?
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FAST FEEDBACK CONFIDENCE PREDICTABILITY
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INGREDIENTS
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INGREDIENTS Feature Planning! Code Reviews! Feature Toggles! Automated Tests! Smoke Tests! Zero Downtime Deploys! Rollback Strategy! Handling Database Migrations! Application Monitoring
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! FEATURE PLANNING
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SMALLEST THING THAT YOU CAN SHIP TODAY Feature Planning
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HOW DO YOU DEPLOY IT WITH ZERO DOWNTIME? Feature Planning
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HOW WILL WE HANDLE DATABASE MIGRATIONS? Feature Planning
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CODE REVIEWS
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GITHUB PULL REQUESTS Reviewing Code
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GITHUB.COM/SQUARE/CANE Reviewing Code
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GITHUB.COM/BBATSOV/RUBOCOP Reviewing Code
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FEATURE TOGGLES
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KEEP IT GHETTO Feature Toggles
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Feature Toggles GITHUB.COM/FETLIFE/ROLLOUT
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Feature Toggles GITHUB.COM/PDA/FLIP
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AUTOMATED TESTS
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WRITE JUST ENOUGH TESTS TO TRUST THE CODE Automated Tests
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SO THEY’RE FAST Automated Tests
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COREY HAINES FAST RAILS TESTS Automated Tests
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SMOKE TESTS
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RUNS POST DEPLOY AGAINST REMOTE SERVER Smoke Tests
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BONUS POINTS: THE SAME TESTS RUN AGAINST REMOTE SERVER & LOCAL Smoke Tests
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ZERO DOWNTIME DEPLOYS
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DEPLOYING NEW CODE WITHOUT MAINTENANCE PAGE Zero Downtime Deploys
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HEROKU PRO TIP: HEROKU LABS:ENABLE PREBOOT Zero Downtime Deploys
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RAILSCASTS TUTORIAL Zero Downtime Deploys
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DATABASE MIGRATIONS
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HARDEST PART Database Migrations
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PGError: ERROR: column "notes" does not exist
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EASY WAY: MAINTENANCE PAGE Database Migrations
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HARD WAY: DEPLOY MIGRATIONS FIRST Database Migrations
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Database Migrations PEDRO BELO ARTICLE
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BEWARE OF DATABASE LOCKING Database Migrations
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Database Migrations GITHUB.COM/SOUNDCLOUD/LHM
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ROLLING BACK DEPLOYS
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JUST ROLL FORWARD Rolling Back Deploys
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JUST TURN THE FEATURE OFF Rolling Back Deploys
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IF YOU HAVE TO: GIT REVERT AND DEPLOY Rolling Back Deploys
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BEAR GRYLLS WORST CASE SCENARIO
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TURN ON MAINTENANCE PAGE Rolling Back Deploys
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APPLICATION MONITORING
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EXCEPTION TRACKING Application Monitoring
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PERFORMANCE MONITORING Application Monitoring
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DAVID GOODLAD BUSINESS METRIC MONITORING Application Monitoring
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GETTING NOTIFIED Application Monitoring
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INGREDIENTS Feature Planning! Code Reviews! Feature Toggles! Automated Tests! Smoke Tests! Zero Downtime Deploys! Rollback Strategy! Handling Database Migrations! Application Monitoring
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TIME TO MIX
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THE FINAL PRODUCT
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FAST FEEDBACK CONFIDENCE PREDICTABILITY
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FAST FEEDBACK CONFIDENCE PREDICTABILITY ✔ ✔ ✔
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AVERAGE NUMBER OF DEPLOYS PER DAY Manual! Deploys Continuous! Deploys
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AVERAGE NUMBER OF DEPLOYS PER DAY 1.9 4.7 130 Additions! Per Deploy 245 Additions! Per Deploy Manual! Deploys Continuous! Deploys
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CONTINUOUS DEPLOYMENT Keith & Mario’s Guide To @keithpitt @mariovisic FIN.