instack-undercloud/elements/discovery-ironic/README.md

This ramdisk collects hardware information from the machine it's booted on and posts it to the URL provided via kernel argument 'ironic_callback_url'.

The ramdisk is meant to be used with Ironic, thus it's name, but it's not really tied to it. We may switch to talking to an intermediate service later without changing ramdisk code.

The hardware information collected by the ramdisk are:

• BMC IP address (may be required for associating with existing node in Ironic)
• CPU count and architecture
• Memory amount in MiB
• Hard drive size in GiB
• Mac addresses for all NICs except the loopback

The machine is halted at the end of the process.