1. Leveraging Ruby For System Administration

3.  10% System Administrator
 ??% “dev‐ops”
 Pure Developers
 Minimal take away

4. Scripting Languages (read: interpreted)
 Perl
 Python
 PHP
 Ruby
Interpreted is the competition here.
 Can anyone else compete?

5.  “Instant gratification” programming
 Speed to implement
 Object oriented
 Readability
 Maintainability
 Open convention
 puts "hello world"
 puts("hello world");

6. Consider this:
 Inconceivable!
 Right tool for the job
 Memory requirements
 Performance
 Windows

7.  1.8.6
 Most common
 Most help available
 1.8.7
 The WindowsME of Ruby
 Some 1.9 features if you’re not ready for 1.9
 1.9.x
 New kid on the block
 Lots of traction
 Vastly improved performance

9.  Why do we write shell scripts?
 sed/awk and their friends...
 Ruby goes above and beyond “pipe‐fitting”
 Glue, huh, wazzat?
 Iterative scripting
 SCM’s are your friend
 Ahh, I “git” it

10.  Ruby apps
 God – Monitoring
 Capistrano – Application Deployment
 Chef/Puppet – System Configuration
 Homebrew – OS X Package Manager
 Moonshine – for the curious, is a Rails deployment
tool that leverages Capistrano and Puppet
 Roll Your OwnTM

11.  Non‐Ruby apps
 Plug‐ins
 More glue

13.  Grep‐fu
 http://github.com/Calamitous/grep‐fu

14.  Here’s grep‐fu… un‐fu’d
find ./
-path '*/.svn' -prune -o
-path '*/.git' -prune -o
-path '*/vendor' -prune -o
-path '*/log' -prune -o
-path '*/public' -prune -o
-path '*/tmp' -prune -o
-path '*/coverage' -prune -o
( -size -100000c -type f ) -print0 |
xargs -0 grep -ril "fu"

15. #!/usr/bin/env ruby
# Thanks for more awesomesauce Eric Budd!
VALID_USERS = {
'ebudd' => 'Eric Budd',
'sdate' => 'Shashank Date',
'lpillow' => 'Luke Pillow’,
'smoon' => 'Scotty Moon',
'cdumler' => 'Chad Dumler-Montplaisir',
}
invalid_names = []
ARGV.each{ |u| invalid_names << u unless VALID_USERS[u] }
if invalid_names.any?
puts "Didn't recognize requested user(s) '#{invalid_names.join(',
')}'. User should be one of #{VALID_USERS.keys.join(', ')}."
exit(0)
end
names = ARGV.map{ |u| VALID_USERS[u] }.join(' & ')
emails = ARGV.map{ |u| "#{u}@zavenetworks.com" }.join(' & ')
`git config --global user.name "#{names}"`
`git config --global user.email "#{emails}"`

16.  Ruby
 Capistrano (deployment)
 New Relic (monitoring/analysis)
 Nokogiri (XML/HTML parsing)
 FasterCSV
 pl_analyzer ‐> request_log_analyzer
 Lots Of Custom Ruby scripts
▪ Jabber, system startup, reporting, mail parsing

17.  Non‐Ruby
 Monit ‐> Nagios (alerting/monitoring)
 Munin (trending)
 bash/sed/awk
 Tsung (load testing)
 Vi

20.  Grand
 Unified
 Ruby
 Solution
 For
 System
 Administration

21.  Is there a way to unify all of this mess?
 Would you really want to?
 Can you have the best of both worlds?

22. Just wanted to give a shout http://spkr8.com/t/3764
out to God, my family, osake.wordpress.com
Ruby Midwest organizers
osake.posterous.com
and you guys!
@osake