May 2015
Intermediate to advanced
278 pages
5h 34m
English
Content preview from Chef Infrastructure Automation Cookbook Second EditionBecome 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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Using attributes to dynamically configure recipes
Imagine some cookbook author has hardcoded the path where the cookbook puts a configuration file—but in a place that does not comply with your rules. Now, you're in trouble! You can either patch the cookbook or rewrite it from scratch. Both options leave you with a lot of work and headaches.
Attributes are there to avoid such headaches. Instead of hardcoding values inside cookbooks, attributes enable authors to make their cookbooks configurable. By overriding default values set in cookbooks, users can inject their own values. Suddenly, it's next to trivial to obey your own rules.
In this section, we'll see how to use attributes in your cookbooks.
Getting ready
Make sure you have a cookbook called ...
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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.