August 2017
Intermediate to advanced
332 pages
9h 16m
English
Content preview from Continuous Delivery with Docker and Jenkins
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Playbook's idempotency
We can execute the command again.
$ ansible-playbook playbook.ymlPLAY [web1] ***************************************************************TASK [setup] **************************************************************ok: [web1]TASK [ensure apache is at the latest version] *****************************ok: [web1]TASK [ensure apache is running] *******************************************ok: [web1]PLAY RECAP ****************************************************************web1: ok=3 changed=0 unreachable=0 failed=0
Note that the output is slightly different. This time the command didn't change anything on the server. That is because each Ansible module is designed to be idempotent. In other words, executing the same module ...
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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.