By Thomas Uphill, John Arundel

Jump-start your Puppet deployment utilizing attractive and functional recipes

About This Book

  • Quickly take hold of recipes that paintings with centralized and decentralized deployments
  • Explore language ameliorations and improvements expected in Puppet model 4
  • Gain professional figuring out of Puppet's most recent and such a lot complicated features
  • Step-by-step unique recipes that assist you take regulate of your servers and desktops

Who This publication Is For

This e-book is for a person who builds and administers servers, specifically in an internet operations context. It calls for a few adventure of Linux structures management, together with familiarity with the command line, dossier procedure, and textual content modifying. No programming event is required.

What you are going to Learn

  • Install and manage Puppet for the 1st time
  • Discover the newest, such a lot complicated, and experimental beneficial properties of Puppet
  • Bootstrap your Puppet installation
  • Master concepts to accommodate centralized and decentralized Puppet deployments
  • Use exported assets and forge modules
  • Create effective manifests to streamline your deployments
  • Automate Puppet grasp deployment utilizing Git hooks, r10k, and PuppetDB
  • Make Puppet trustworthy, performant, and scalable

In Detail

Puppet is a configuration administration approach that automates your whole IT configurations, supplying you with keep watch over of what you do to every node, in the event you do it, and the way you do it.

Puppet Cookbook 3rd variation takes the reader from a easy wisdom of Puppet to an entire and specialist realizing of Puppet's newest and such a lot complex positive factors. up-to-date with the newest developments and top practices, it provides a transparent view on the best way to "connect the dots" and expands your wisdom to effectively use and expand Puppet.

This e-book delves into a variety of features of writing strong Puppet code, including utilizing Puppet neighborhood kind, checking your manifests with puppet-lint, and studying neighborhood top practices, with an emphasis on real-world implementation.

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Extra resources for Puppet Cookbook - Third Edition

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If you happen to examine /etc/puppet/puppet. conf, you will see the next new strains: storeconfigs = real storeconfigs_backend = puppetdb there is more... Now that PuppetDB is configured and we now have had a profitable agent run, PuppetDB could have facts we will question: root@puppet:~# puppet node prestige puppet puppet presently lively final catalog: 2014-09-11T06:45:25. 267Z final proof: 2014-09-11T06:45:22. 351Z Configuring Hiera Hiera is a knowledge repository for Puppet. utilizing Hiera you could have a hierarchical categorization of information approximately your nodes that's maintained open air of your manifests. this is often very priceless for sharing code and working with exceptions that may creep into any Puppet deployment. preparing Hiera must have already been put in as a dependency in your Puppet grasp. If it has no longer already, set up it utilizing Puppet: root@puppet:~# puppet source package deal hiera ensure=installed package deal { 'hiera': make sure => '1. three. 4-1puppetlabs1', } how one can do it... Hiera is configured from a yaml dossier, /etc/puppet/hiera. yaml. Create the dossier and upload the next as a minimum configuration: --- :hierarchy: - universal :backends: - yaml :yaml: :datadir: '/etc/puppet/hieradata' Create the typical. yaml dossier referenced within the hierarchy: root@puppet:/etc/puppet# mkdir hieradata root@puppet:/etc/puppet# vim hieradata/common. yaml --- message: 'Default Message' Edit the location. pp dossier and upload a notify source according to the Hiera price: node default { $message = hiera('message','unknown') notify {"Message is $message":} } follow the happen to a try out node: t@ckbk:~$ sudo puppet agent -t details: Retrieving pluginfacts information: Retrieving plugin ... details: Caching catalog for cookbook-test details: employing configuration model '1410504848' become aware of: Message is Default Message detect: /Stage[main]/Main/Node[default]/Notify[Message is Default Message]/message: outlined 'message' as 'Message is Default Message' become aware of: comprehensive catalog run in zero. 06 seconds the way it works... Hiera makes use of a hierarchy to look via a suite of yaml documents to discover the suitable values. We outlined this hierarchy in hiera. yaml with the one access for universal. yaml. We used the hiera functionality in website. pp to search for the price for message and shop that worth within the variable $message. The values used for the definition of the hierarchy may be any facter evidence outlined in regards to the method. a typical hierarchy is proven as: :hierarchy: - hosts/%{hostname} - os/%{operatingsystem} - network/%{network_eth0} - universal there is more... Hiera can be utilized for computerized parameter look up with parameterized sessions. for instance, when you have a category named cookbook::example with a parameter named writer, you could contain the subsequent in a Hiera yaml dossier to instantly set this parameter: cookbook::example::publisher: 'PacktPub' one other frequently used truth is atmosphere you could reference the surroundings of the customer node utilizing %{environment} as proven within the following hierarchy: :hierarchy: hosts/%{hostname} os/%{operatingsystem} environment/%{environment} universal Tip a great rule of thumb is to restrict the hierarchy to eight degrees or much less.

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