A vast amount of information from a given system is available to Chef through Ohai. This program is executed during each Chef run and stores all of the gathered information in the Chef database to make it available right from the cookbooks. The kind of information gathered by default is quite large.
It ranges from networking details—such as link speed, MTU, or addresses—to all the memory usage details you'd find on a utility such as
top, all of the imaginable data regarding filesystems or virtualization systems, or the list of every single installed package and logged-in users.
On top of this, Ohai is a modular system with a lot of community plugins to integrate Dell DRAC information with support ...