Building and Testing Puppet

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@stahnma Testing and Delivering Puppet Michael Stahnke | Director of Engineering | @stahnma

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@stahnma Drawn Title Slide

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Michael Stahnke Puppet, Inc Director of Engineering @stahnma

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@stahnma Building and Testing Puppet What are we doing and Why are we doing it? @stahnma

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@stahnma We have a CI system @stahnma

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@stahnma @stahnma

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@stahnma

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@stahnma

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@stahnma

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@stahnma Deﬁnition of history @stahnma

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@stahnma

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@stahnma How is Pe formed? @stahnma

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@stahnma @stahnma

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@stahnma @stahnma

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@stahnma We were excited about 500 builds a week shipping 3 times a week new platforms @stahnma

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@stahnma Composition @stahnma

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@stahnma Growing jenkins

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@stahnma

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@stahnma 30-40% failure rate @stahnma

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@stahnma Digging into failures @stahnma

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@stahnma v

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@stahnma Failures are still valid @stahnma

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@stahnma Errors are not @stahnma

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@stahnma

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@stahnma @stahnma

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@stahnma @stahnma

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@stahnma @stahnma

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@stahnma Build our own tools @stahnma

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@stahnma List of tools we’ve built

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@stahnma

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@stahnma Dont’ forget JJB @stahnma

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@stahnma

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@stahnma Study through observation and experiment What are we doing? @stahnma

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@stahnma The scientiﬁc method @stahnma

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@stahnma The hypothesis @stahnma

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@stahnma The experiment @stahnma

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@stahnma

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@stahnma The Goal Developer must be able to make a small change and measure it without intervention

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@stahnma A commit @stahnma

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@stahnma What’s the required path? @stahnma

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@stahnma @stahnma

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@stahnma Review a change

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@stahnma The build Process @stahnma

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@stahnma Fetch Sources @stahnma

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@stahnma Patch thing if applicable @stahnma

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@stahnma Build all components @stahnma

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@stahnma Place components into an All in One Package @stahnma

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@stahnma @stahnma

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@stahnma The Component Process @stahnma

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@stahnma The Composite Process

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@stahnma @stahnma

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@stahnma The Control @stahnma

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@stahnma The variables @stahnma

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@stahnma Small variable illustration @stahnma

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@stahnma @stahnma

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@stahnma Challenges of on premise delivery Cost of being wrong user’s ability to update multiple stream upgrade matrix

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@stahnma Error rate vs Failure @stahnma

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@stahnma Today’s constraints @stahnma

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@stahnma 2% error rate story @stahnma

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@stahnma Capacity problems @stahnma

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@stahnma Entry point onto the system

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@stahnma @stahnma

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@stahnma @stahnma

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@stahnma What’s next @stahnma

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@stahnma Mesos @stahnma

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@stahnma ABS

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@stahnma Run me maybe @stahnma

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@stahnma Dont’ forget JJB @stahnma

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@stahnma Job DSL @stahnma

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@stahnma People organization @stahnma

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@stahnma Goals for our Team @stahnma

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@stahnma Sidebar @stahnma

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@stahnma Tools and Sources Slide @stahnma

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@stahnma New platform

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@stahnma Start building @stahnma

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@stahnma Facter/ T&P @stahnma

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@stahnma Workﬂow for shipment @stahnma

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@stahnma https://gist.github.com/stahnma/5d07b2a61387ab81e1f66e8ea4a32ab4

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Final Thoughts ● Puppet is difficult to build and test, but that’s what makes it fun ● We’ve learned a ton along the way, we’re still going ● New mistakes and lessons are indications of forward progress ● We build our own tools when we see fit, but prefer not to ● The system is our factory floor ● The system performs science ● The people make the system

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@stahnma `