Functional Testing for Configuration Management at Cascadia IT Conference 20150314

1. Garrett Honeycutt
gh@learnpuppet.com
learnpuppet.com
@learnpuppet
Functional testing for
configuration management

6. spec vs
functional

7. http://www.structuretech1.com/wp-content/uploads/2012/11/Gate-valve-exploded1.jpg

10. what is
functional
testing?

12. Functional test for ntp module
1. set time incorrectly
2. apply ntp class
3. check that time is correct

13. #/bin/sh
#
puppet agent -t
while [ $? -ne 0 ]
do
puppet agent -t
done

14. Functional test for
idempotency
1. start with a blank system
2. apply class
3. changes should occur
4. apply class again
5. no changes occur

15. why write
tests at
all?

24. tooling

25. https://github.com/unixmonkey/learngit

32. http://serverspec.org/

39. how to
approach

40. functionally test
each module

41. functionally test
each role

42. role: repo
* main entry point is the class
yum::server

43. role: repo
* main entry point is the class
yum::server
* simple apache web server with a
DocumentRoot set to serve packages

44. role: repo
* main entry point is the class
yum::server
* simple apache web server with a
DocumentRoot set to serve packages
* manages only a couple files and
packages

45. apache hosts rsyslog
apache::mod::cache inittab selinux
apache::mod::cgi motd ssh
apache::mod::dav network sysklogd
apache::mod::dav_fs nsswitch timezone
apache::mod::default ntp types
apache::mod::proxy pam utils
apache::mod::ssl pam::accesslogin vim
apache::params pam::limits wget
common papertrail yum
dnsclient puppet::agent yum::server
facter redhat yum::updatesd

46. apache hosts rsyslog
apache::mod::cache inittab selinux
apache::mod::cgi motd ssh
apache::mod::dav network sysklogd
apache::mod::dav_fs nsswitch timezone
apache::mod::default ntp types
apache::mod::proxy pam utils
apache::mod::ssl pam::accesslogin vim
apache::params pam::limits wget
common papertrail yum
dnsclient puppet::agent yum::server
facter redhat yum::updatesd
36 classes in 23 modules

48. Monitoring

50. $ ping -c1 example.com
PING example.com (93.184.216.119): 56
data bytes
64 bytes from 93.184.216.119: icmp_seq=0
ttl=58 time=4.947 ms
--- example.com ping statistics ---
1 packets transmitted, 1 packets
received, 0.0% packet loss
round-trip min/avg/max/stddev =
4.947/4.947/4.947/0.000 ms

51. $ curl example.com -I
HTTP/1.1 200 OK
Accept-Ranges: bytes
Cache-Control: max-age=604800
Content-Type: text/html
Date: Thu, 13 Nov 2014 03:52:15 GMT
Etag: "359670651"
Expires: Thu, 20 Nov 2014 03:52:15 GMT
Last-Modified: Fri, 09 Aug 2013 23:54:35
GMT
Server: ECS (pae/3796)
X-Cache: HIT
x-ec-custom-error: 1
Content-Length: 1270

52. 1. set the role
2. converge on model
3. seed a package on the
system
4. on another system, set it to
use the first as a repo
5. install the seeded package
from the repo

54. who does
what?

55. how to
automate

56. &&

57. Garrett Honeycutt
gh@learnpuppet.com
learnpuppet.com
@learnpuppet