October 2011
Intermediate to advanced
300 pages
5h 51m
English
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Using node inheritance
It's a brave (or foolish) sysadmin who puts all her servers in one basket. Let's say you have dedicated servers hosted with three different providers: WreckSpace, GoDodgy, and VerySlow. They have different data centers and geographical locations, so you will need to make small modifications to your config for servers hosted with each provider. You have several different types of servers, but they are distributed randomly across the three providers.
One way to implement this in Puppet would be to set a variable in the node definition that tells the node where it is:
node webserver127 { $provider = "VerySlow" include admin::basics include admin::ssh include admin::ntp include puppet::client include backup::client include webserver ...Become 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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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.