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Everything I learned about Continuous Integration, I learned from Systems Administration

Julian Simpson
Julian Simpson
Julian SimpsonSoftware Engineer at The Build Doctor

DevOpsDays Gothenburg presentation where we explain how an earlier career in Systems Administration helped us kick ass in running Continuous Integration.

Everything I learned about Continuous Integration, I learned from Systems Administration

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Everything I know
    about CI
  I learned from Systems Administration




Julian Simpson, The Build Doctor Ltd
with Tom Sulston, ThoughtWorks Ltd
--about-this-talk
Nothing is new
Especially me
Nothing is new
   Especially me
Especially me
   or Tom
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Everything I learned about Continuous Integration, I learned from Systems Administration

Editor's Notes

  1. \n
  2. - audience can ask questions\n- this is a loose structure to talk about CI. Ask questions if you like.\n- it’s about dev, but from ops point of view\n
  3. \n
  4. - infrastructures.org- cfengine - annoying guy on list- 2004: started running cruisecontrol\n- 2006: puppet - 2010: Started consulting in London- 2011: LondonCI meetup\n- Most things I see are broken\n
  5. Tom talks about why he’s here\n
  6. Daily Windows builds: Windows 95\nMozilla Tinderbox: 1999 -- https://github.com/mozilla/puppet-manifests\nMartin’s paper: 2000 CruiseControl: 2001\n\n\n
  7. next page\n- \n
  8. “Ci-but”: sans database, sans proper app deployment\n“Slow feedback loops”\nSucky tests\n\n
  9. I get to complain about things, to you\n\n
  10. \n
  11. \nExplain that you need to do CI first\n
  12. Doug McIroyThis is the Unix philosophy: Write programs that do one thing and do it well. Write programs to work together. Write programs to handle text streams, because that is a universal interface.\nGreat design philosophy\n
  13. See notes on slide\n\n
  14. \n
  15. \n
  16. \n
  17. Operating system packages rock - explain sums\nPuppet and Chef - we know configuration management\nYou have to understand something /before/ you automate it\n\n
  18. We understand Disk I/O\nAnecdote of Sam’s CI server\nCI is a CPU/RAM/disk intensive activity\n\n
  19. CI outages cost money\n6 developers * 300/day\nthey should do without without servers\nbut who does\nCI is a production system\n
  20. Trouble shooting skills: strace, lsof, apptrace, dtrace, top,iostat\nBuilds are meant to break\n
  21. It’s the gateway to production\nYou’d be crazy not to do so\n
  22. \n
  23. We’ve been coding in Ksh,bash,perl, ruby for years\n
  24. \n
  25. “in the brains of your developers”\n“everything from source, to test, to commit to behaviour”\n
  26. \n
  27. \n