Managing Infrastructure with Puppet by James Loope

By James Loope

Get all started with Puppet, and find out how this renowned configuration administration framework is helping you automate your servers. This concise creation indicates you ways to take advantage of Puppet’s instruments and templates to arrange and execute configuration plans on Linux, Unix, and home windows servers. via code samples and real-world examples, you’ll easy methods to deal with swimming pools of servers and digital situations, and the way to manage entry regulate. If you’re new to Puppet, yet conversant in platforms management and Ruby language fundamentals, this booklet is the proper method to begin utilizing this open resource framework.

* examine Puppet basics, together with its show up syntax and integrated features
* shop configurations in a crucial place with PuppetMaster, and outline which configurations observe to which nodes
* construct a framework to create consumer debts in preference to LDAP or Kerberos KDC
* observe strategies to execute and deal with server configurations with MCollective
* Use Puppet as an auditing instrument to make sure that configurations are right
* assemble info at the nodes you deal with with the Facter library

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If I were to have declared a real resource, every node that includes the people class would have had her user created. com. It may seem obvious, but it must be said: Your Puppet manifests need to be kept secure. They will often contain secrets such as user password hashes and database credentials. Even if you can distribute those pieces out of band, the classes themselves are a road map to your system configuration and would be a security breach should they find a way out of your organization. com.

Injecting variables into config file templates like this will let us drastically reduce the number of individual configuration files we need to maintain. org/stdlib/libdoc/erb/rdoc/, and there are plenty of online tutorials on complex templating. I’ve tried to give you a few real-world examples of how to implement the various features of Puppet, but the applications are vast and varied. com/. There are plenty of great patterns of implementation and organization in these projects, and you may even come across an out-of-the-box solution to a problem of your own.

Puppet’s client-server model, in its default configuration, will poll the Puppet Master once every half hour. This is not convenient, for instance, if you would like to use Puppet to coordinate an application release on a group of servers. If you would like some control over the sequence and timing of the Puppet runs, you can use the MCollective puppetd agent and forgo the polling behavior of the agent daemon. Since Puppet is built in to MCollective, it is not necessary to run the agent on boot either.

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