Setting up monitoring for web applications can be complicated - tests tend to lack expressiveness, or and quite often they don't even test the right problem in the first place. cucumber-nagios lets a sysadmin write behavioural tests for their web apps in plain English, and outputs the test results in the Nagios plugin format, allowing a sysadmin to be notified by Nagios when their production apps aren't behaving.

1. Monitoring web application
behaviour with
cucumber-nagios
Lindsay Holmwood <lindsay@holmwood.id.au>

4. http://flickr.com/photos/therefromhere/510612621/

5. # features/google.com.au/search.feature
Feature: google.com.au
It should be up
And I should be able to search for things
Scenario: Searching for things
When I visit quot;http://www.google.comquot;
And I fill in quot;qquot; with quot;wikipediaquot;
And I press quot;Google Searchquot;
Then I should see quot;www.wikipedia.orgquot;

7. --format pretty

8. $ bin/cucumber --require bin/common.rb
--require features/
features/google.com.au/search.feature
--format pretty

9. $ bin/cucumber --require bin/common.rb
--require features/
features/google.com.au/search.feature
Feature: google.com.au
It should be up
And I should be able to search for things
Scenario: Searching for things
When I visit quot;http://www.google.comquot;
And I fill in quot;qquot; with quot;wikipediaquot;
And I press quot;Google Searchquot;
Then I should see quot;www.wikipedia.orgquot;
1 scenario
4 steps passed
--format pretty

11. cucumber

12. cucumber
webrat

13. cucumber
webrat
mechanize

14. cucumber
webrat
mechanize
nagios =>

15. cucumber-nagios

16. $ bin/cucumber-nagios features/google.com.au/search.feature
Critical: 0, Warning: 0, 4 okay | passed=4, failed=0, total=4
cucumber-nagios

17. how it works
http://flickr.com/photos/sunbeer/931205335/

19. $ bin/cucumber-nagios
features/google.com.au/search.feature

20. $ bin/cucumber-nagios
features/google.com.au/search.feature
$ bin/cucumber --require bin/common.rb
--require features/
--format Nagios::NagiosFormatter
features/google.com.au/search.feature

21. $ bin/cucumber-nagios
features/google.com.au/search.feature
$ bin/cucumber --require bin/common.rb
--require features/
--format Nagios::NagiosFormatter
features/google.com.au/search.feature

22. module Nagios
class NagiosFormatter
def initialize(*args)
@failed = []; @passed = []
end
def step_passed(step, name, params)
@passed << step
end
def step_failed(step, name, params)
@failed << step
end
def scenario_executed(scenario)
@total = @failed.size + @passed.size
message = quot;quot;
message += quot;Critical: #{@failed.size}, quot;
message += quot;Warning: 0, quot;
message += quot;#{@passed.size} okayquot;
message += quot; | passed=#{@passed.size))}quot;
message += quot;, failed=#{@failed.size))}, total=#{@total}quot;quot;
puts message
end
end
end

23. #!/bin/sh
dirname=$(dirname $0)
feature=$1
$dirname/cucumber --require $dirname/common.rb
--require features/
--format Nagios::NagiosFormatter
$feature
retval=$?
if [ quot;$retvalquot; -eq quot;1quot; ]; then
exit 2
else
exit $retval
fi

24. #!/bin/sh
dirname=$(dirname $0)
feature=$1
$dirname/cucumber --require $dirname/common.rb
--require features/
--format Nagios::NagiosFormatter
$feature
retval=$?
if [ quot;$retvalquot; -eq quot;1quot; ]; then
exit 2
0 good
else
exit $retval
1 bad
fi
2 ugly

25. http://flickr.com/photos/chrisindarwin/3082606450/

26. Setting up

28. $ gem sources -a http://gems.github.com/

29. $ gem sources -a http://gems.github.com/
# gem install auxesis-cucumber-nagios

30. $ gem sources -a http://gems.github.com/
# gem install auxesis-cucumber-nagios
$ cucumber-nagios-gen project mysite.com

31. $ gem sources -a http://gems.github.com/
# gem install auxesis-cucumber-nagios
$ cucumber-nagios-gen project mysite.com
woosh!

32. $ gem sources -a http://gems.github.com/
# gem install auxesis-cucumber-nagios
$ cucumber-nagios-gen project mysite.com
woosh!
$ cd mysite.com

33. $ gem sources -a http://gems.github.com/
# gem install auxesis-cucumber-nagios
$ cucumber-nagios-gen project mysite.com
woosh!
$ cd mysite.com
$ rake deps

34. $ gem sources -a http://gems.github.com/
# gem install auxesis-cucumber-nagios
$ cucumber-nagios-gen project mysite.com
woosh!
$ cd mysite.com
$ rake deps
brr!

36. $ bin/cucumber-nagios-gen feature search

37. $ bin/cucumber-nagios-gen feature search
$ bin/cucumber-nagios features/search.feature

38. Quirks

39. Failure
*IS* an
option

41. begin
# foo
rescue
# bar
end

42. Multiple
Scenarios
per File

43. Critical: 1, Warning: 0, 2 okay | passed=2, failed=1, total=3
Critical: 1, Warning: 0, 4 okay | passed=4, failed=1, total=5

46. Instead of writing boring monitoring
plugins from scratch, you can now
do behavior driven ops!

47. Instead of writing boring monitoring
plugins from scratch, you can now
do behavior driven ops!
Transform from a grumpy,
misanthropic sysadmin to a hipster,
agile developer instantly.
— Bradley Taylor (http://bit.ly/lWWfE)

48. developers sysadmins
http://flickr.com/photos/jshappell/1313699764/

49. building bridges
http://flickr.com/photos/douaireg/2313764485/

50. http://github.com/auxesis/
cucumber-nagios
http://dryicons.com/free-icons/preview/coquette-part-3-icons-set/