August 2017
Intermediate to advanced
332 pages
9h 16m
English
Content preview from Continuous Delivery with Docker and Jenkins
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Handlers
Some operations should be executed only if some other task changed. For example, imagine that you copy the configuration file to the remote machine and the Apache server should be restarted only if the configuration file has changed. How to approach such a case?
For example, imagine that you copy the configuration file to the remote machine and the Apache server should be restarted only if the configuration file has changed. How to approach such a case?
Ansible provides an event-oriented mechanism to notify about the changes. In order to use it, we need to know two keywords:
- handlers: This specifies the tasks executed when notified
- notify: This specifies the handlers that should be executed
Let's look at an example of how we could ...
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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.