August 2015
Intermediate to advanced
168 pages
3h 32m
English
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Running a task only once
At times, a specific task in a role may need to be executed only once during a playbook execution, even though the role is applied to many hosts. This could be achieved with the run_once conditional:
name: initialize wordpress database script: initialize_wp_database.sh run_once: true
Since we are using the run_once option, the preceding task would run on the first host in the inventory that the role is being applied to. All consequent hosts would skip this task.
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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.