June 2011
Beginner
56 pages
1h 13m
English
Content preview from Managing Infrastructure with PuppetBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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The Puppet Master
Running a central Puppet Master server will allow us to build configurations that are specific to a particular system and then hand them out to be executed on demand. It can be a central repository for the configuration of all servers in your data center, allowing for the centralized deployment of updates and applications.
Once the Puppet Master is installed, you’ll have an empty Puppet repository in /etc/puppet. When the Puppet Master starts up, the first file it loads is /etc/puppet/manifests/site.pp. Generally this file will include a nodes.pp file as well as set some default parameters. nodes.pp will tell the Puppet Master how to decide what classes it should apply to a system, called a node, when it checks in.
Note
The Puppet Master and agent communicate over tcp port 8140. Make sure that any applicable firewall settings allow communication on that port between the two.
Let’s step through how to set up a node definition and apply a class to it with a central Puppet Master rather than by manually applying the manifest.
First, you’ll need to have both agent and master installed. For simplicity’s sake, these can be on the same system. Then set up a simple /etc/puppet/manifests/site.pp and nodes.pp.
This site.pp includes our nodes.pp and sets up a couple of defaults. The first of these is the filebucket. When Puppet makes some change to the filesystem, such as overwriting a config file with an update, it will make a backup of the original. When we define a filebucket ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.