Using Puppet - Real World Configuration Management

Using Puppet Real World Conﬁguration Management James Turnbull http://puppet.reductivelabs.com

Questions… Feel free to ask questions

Where do I come from?

Conﬁguration Management?

Management Speak • Management model for:  Infrastructure  Applications  Data • Documentation of attributes and operations • Organization of attributes and operations • Validation, audit, and veriﬁcation

Where does it ﬁt in?

Do you need it? Large number of like hosts … that are somehow never alike

Do you need it? High level of failed change http://www.ﬂickr.com/photos/22676988@N06/2426527413/

Do you need it? When your hosts look like this...

Just for enterprises? “Mum, what’s an enterprise?”

What are the beneﬁts? Reproducibility Accuracy Homogeneity Decision Support Saves Money!

all this gets you ... http://www.ﬂickr.com/photos/ibuch/115409282/

Risks & Challenges Tools != Process Information is power Accurate information is all-powerful

Best practice Life cycle Categorize, modularize, standardize Control Test, Test, and Test again

Who sells this? Proprietary software vendors http://www.ﬂickr.com/photos/ca_newsom/2199106278/

So what’s wrong? Archaic Monolithic http://www.ﬂickr.com/photos/draggin/15223525/ http://www.ﬂickr.com/photos/jamesotron/511509780/

Who gives this away? Free Open Source Software http://www.ﬂickr.com/photos/tigr/26362667/

Introducing puppet Andrew Luke Photo from: http://www.ﬂickr.com/photos/lkanies/2659592110/

Would you buy software from those guys?

The key pieces Abstracts conﬁguration as resources Allows relationships Idempotent

How is it managed? Declarative not imperative language WHAT not HOW

Puppet…. package { “ruby”: ensure => latest, }

Not Puppet… # yum install ruby # up2date ruby # apt-get install ruby # ﬁnk install ruby # ports install ruby # pkg_add ruby # emerge ruby # pkg-get ruby # rpm -Uvh ruby-1.8.6.i386.rpm # rug install ruby # gem install ruby # pkgadd ruby

A whole service... yum install bind vim /etc/named.conf service start named package { bind: ensure => installed } ﬁle { “/etc/named.conf”: source => “puppet://server/srv/bind/named.conf” } service { named: ensure => running }

Puppet Client-Server model SSL communication Unix-centric Highly extensible Written in Ruby

What’s new? New support for Zenoss Native support for Augeas Enhanced conditionals Automated documentation of modules Native support for SELinux Microsoft Windows support on the way!

What can be managed? 30 package types Users & groups Services Nagios Support for Debian, Ubuntu, Red Hat, Solaris, OS X, Gentoo, SuSE, *BSD, AIX, HP-UX and others.

In the clouds... Spacewalk Capistrano Augeas Amazon (E2, S3, SQS) Func Cloud tools on the way... Cobbler Kickstart Preseed

Classes & definitions class postfix { … collection of resources … } define postfix_files { ... Repeatable application … }

Modules Collections of classes, deﬁnitions and resources Portable and self-contained Several collections of modules available online for common conﬁgurations: http://reductivelabs.com/PuppetModules

Nodes node “webserver.domain.com” { include webserver } node “db1”, “db2”, “db3” { include database } Nodes also support inheritance

Let’s all get related… You can apply resources before other resources After other resources In response to other resources Or even subscribe to resource changes

Language Attributes Arrays [ “red”, “green”, “blue” ] Variables $variable = value Conditionals If/else statements Case statement Selectors

Templates Allows you to create template configuration files For file-based configurations without types Uses Ruby ERB Allows population of templates with Puppet configuration, variables and facts

Facter System inventory tool Returns facts about hosts Detects changes and updates information Facts can be used in Puppet conﬁgurations You can create custom facts NEW! Windows fact support!

facts hostname => absinthe ipaddress => 10.0.0.15 kernel => Linux

Measuring success Availability Reduction in incidents Rate of failed change Build time and speed to market Compliance to SOE, policy & standards

Do more with less? Doesn’t mean head count cuts Doesn’t mean budget cuts More time to work on the projects that count Better use of time means happier people

The future ….

The future is ... REST APIs Better performance Better memory use Automated plug-in system Automated module system

The future is ... Workﬂow systems Service Level Management Compliance & Governance systems Inventory

Puppetshow

iClassify

PuppetView

Questions? Puppet http://puppet.reductivelabs.com Pulling Strings With Puppet http://www.apress.com/book/view/1590599780 © All images from Flickr and copyright to their owners

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Using Puppet - Real World Configuration Management

by James Turnbull on Feb 15, 2009

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Using Puppet - Real World Configuration Management — Presentation Transcript