May 2017
Intermediate to advanced
726 pages
15h 38m
English
Content preview from Chef: Powerful Infrastructure AutomationBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Templates
Chef dynamically configures software and hosts, and a large part of configuring UNIX-based systems and software involves configuration files. Chef provides a straightforward mechanism to generate configuration files that make it easy to combine configuration data with template files to produce the final configuration files on hosts. These templates are stored in the templates directory inside of a cookbook and use the ERB template language, which is a popular and easy-to-use Ruby-based template language.
Why use templates?
Without templates, your mechanism to generate configuration files would probably look something like this:
File.open(local_filename, 'w') do |f| f.write("<VirtualHost *:#{node['app]['port']}") ... f.write("</VirtualHost>") ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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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.