August 2015
Intermediate to advanced
168 pages
3h 32m
English
Content preview from Ansible Playbook Essentials
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Variable precedence
We specified variable defaults, used them in inventory files, and defined the same variable from different places (for example, defaults, vars, and inventory). Let's now analyze the output of the templates to understand what happened with all those variables.
The following is the figure showing the my.cnf file on Ubuntu:
The following is the analysis of the screenshot:
- The file has a notice in the comments section. This can deter admins from making manual changes to the file.
- Most of the variables come from the defaults in a role. This is because Debian is our default family of operating systems and we already have sane defaults ...
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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.