Ohai

Ohai Overview

Ohai detects data about your operating system. It can be used standalone, but it's primary purpose is to provide node data to Chef.

When invoked, it collects detailed, extensible information about the machine it's running on, including Chef configuration, hostname, FQDN, networking, memory, CPU, platform, and kernel data.

When used standalone, Ohai will print out a JSON data blob for all the known data about your system. When used with Chef, that JSON output is reported back via "automatic" node attributes to update the node object on the chef-server.

Ohai Use and Plugins

This section of the Wiki describes using Ohai and writing plugins for it.

• Ohai Installation and Use

• Writing Ohai Plugins

• Loading Custom Ohai Plugins

• Distributing Ohai Plugins

• Disabling Ohai Plugins

• Ohai Release Notes

  
  
  
  
  

Nodes

Ohai Installation and Use