20150314 - functional testing for configuration management @ cascadia it conference
TRANSCRIPT
Garrett [email protected]
learnpuppet.com@learnpuppet
Functional testing for configuration management
spec vs functional
http://www.structuretech1.com/wp-content/uploads/2012/11/Gate-valve-exploded1.jpg
what is functional testing?
Functional test for ntp module
1. set time incorrectly2. apply ntp class3. 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 system2. apply class3. changes should occur4. apply class again5. no changes occur
why write tests at
all?
tooling
how to approach
functionally test each module
functionally test each role
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
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
Monitoring
$ 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 role2. converge on model3. seed a package on the system4. on another system, set it to use the first as a repo5. install the seeded package from the repo
who does what?
how to automate
&&
