Lrug
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The document discusses the convergence of system administrators and developers as programming has become more integral to system administration work. It notes that system administrators now write code using languages like Ruby, Python, and Bash just as developers do. It argues that system administrators who do not program have become merely domain experts. The document also discusses challenges around sharing system administration tools and modules, as well as testing infrastructure using approaches from software development like Cucumber testing.
Lrug
- 1. Weʼre all developers now Julian Simpson 1
- 2. Who are you? 2
- 3. Who am I? • Recovering Systems Administrator • Recovering Build Manager • Occasional blogger 3
- 4. Whatʼs this talk about? • Developers • Systems Administrators • The total failure of us all to get along • Testing sysadmin stuff 4
- 5. Where did it all go wrong?
- 7. • James Gosling invents Java
- 9. • James Gosling invents Java • Microsoft make Windows usable
- 11. • James Gosling invents Java • Microsoft make Windows usable • We make developers work on Windows
- 13. • James Gosling invents Java • Microsoft make Windows usable • We make developers work on Windows • Sysadmins and developers diverge
- 14. Dʼoh!
- 15. Developers write: • HTML • CSS • Ruby • SQL • Javascript 15
- 16. Sysadmins write: • Puppet • M4 macro processor • Bash • Ruby • Sendmail.cf 16
- 17. This guy writes a language http://www.flickr.com/photos/33304338@N05/ http://www.flickr.com/photos/varrqnuht/ So does this guy 17
- 19. • Sysadmins who don’t program are now just domain experts • I’m not sure we need too many of those.
- 21. You guys rule • You (mostly) develop on Macs 21
- 23. You guys rule • You (mostly) develop on Macs • You have a working deploy tool 23
- 25. You guys rule • You (mostly) develop on Macs • You have a working deploy tool • It even does database migrations 25
- 26. You guys rule • You (mostly) develop on Macs • You have a working deploy tool • It even does database migrations • So whatʼs left to talk about? 26
- 27. Whatʼs left? • Sharing • Testing of infrastructure • Fixing Rubygems 27
- 29. Itʼs not this insert CC -licensed howto
- 30. Sharing • Sysadmins used to be stuck with vendor OSes • You would have trouble sharing a shell script • Let alone some of the odd tools that weʼve had • Rise of Linux, Ruby and admin DSLs (*cough* *Puppet*) fixes that 30
- 31. Sharing • Puppet has modules • Soon they will have metadata • Thereʼs beginnings of consensus on how to share those • Letʼs not distribute them as gems 31
- 32. Puppet Module Puppet code Files that your module distributes ERB Templates
- 33. Puppet Module hook shared code
- 34. Puppet Module
- 35. Puppet Modules • Will soon get metadata • Need to solve some solved problems (.e.g dependencies 35
- 36. Testing But what kind of testing? http://www.flickr.com/photos/tm-tm/ 36
- 37. Testing • Monitoring (testing your code at runtime) • Testing your infrastructure • Testing same before you deploy it 37
- 39. Monitoring • some of our tools are beginning to look very baroque • Nagios comes to mind • Operational testing very different from developer testing 39
- 40. Monitoring • @auxesis: “continuous integration for production apps” • minus checkout and build phases • How to use existing cucumber features? 40
- 41. Cucumber Nagios • http://auxesis.github.com/cucumber- nagios/ • Runs your cucumber features • Outputs Nagios format. Job done. 41
- 42. Cucumber Love • Cucumber-nagios now supports testing of SSH • @unixdaemon doing acceptance testing for DNS (just avoid some of the Ruby DNS resolver libraries) • @ripienaar test driving deployments with cucumber 42
- 43. Before you go live? • How do we do unit tests in sysadmin? 43
- 44. Before you go live? • How do we do unit tests in sysadmin? • Validating is a good start. 44
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- 48. Thank you! http://www.build-doctor.com http://twitter.com/builddoctor This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 2.0 UK: England & Wales License . 48
Editor's Notes
- #31: CVSup is written in Modula-3! eek!