Today, Ironic has two deploy ramdisks that may be used; one for the PXE driver, one for the agent driver. Why not have one?
I propose that the IPA ramdisk should be built with two containers: one that runs IPA, and another that runs the PXE deploy ramdisk scripts.
Task: build a container into the IPA ramdisk that runs the PXE scripts. A kernel command line argument should be defined to switch between the two containers. I propose "deploy_method" as the parameter, and "iscsi" or "agent" for valid values.
Primarily, this will need to run:
https://github.com/openstack/diskimage-builder/blob/master/elements/ramdisk-base/init.d/20-init-variables
https://github.com/openstack/diskimage-builder/blob/master/elements/deploy-ironic/init.d/80-deploy-ironic
We'll also need to update Ironic to pass this kernel parameter when using the PXE driver; it should be a parameter that the DIB ramdisk ignores, and that the IPA ramdisk defaults to "agent", for backwards compatibility.
This was solved by https:/