August 2017
Intermediate to advanced
332 pages
9h 16m
English
Content preview from Continuous Delivery with Docker and Jenkins
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Creating inventory
An inventory is a list of all the servers that are managed by Ansible. Each server requires nothing more than the Python interpreter and the SSH server installed. By default, Ansible assumes that the SSH keys are used for authentication; however, it is also possible to use the username and the password by adding the --ask-pass option to the Ansible commands.
SSH keys can be generated with the ssh-keygen tool and are usually stored in the ~/.ssh directory.
The inventory is defined in the /etc/ansible/hosts file and it has the following structure:
[group_name]<server1_address><server2_address>...
The inventory syntax also accepts ranges of servers, for example, www[01-22].company.com. The SSH port should also be specified ...
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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.