20150314 - Functional Testing for Configuration Management @ Cascadia IT Conference

Mar 17, 20150 likes995 views

This document discusses functional testing for configuration management using Puppet. It provides examples of functional tests for the ntp module and testing for idempotency. It also discusses how to approach functionally testing each Puppet module and role. The document recommends testing roles by setting up one system as a package repository, seeding a package, and having another system install it from the repo to validate the role's configuration.

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

20150314 - Functional Testing for Configuration Management @ Cascadia IT Conference

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

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

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

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

https://github.com/unixmonkey/learngit

http://serverspec.org/

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

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

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

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

$ 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

$ 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

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

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

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