Okay, thanks for the hint . That works indeed.
I have read the docs some time ago, and I think it was standing there already. But at this time, one or two versions before the current one, I couldn’t get the PXE boot to run with the
coreos.live.rootfs_url parameter. No idea why… but so I got used to specify the two files in the initrd parameter, but when I tried it with 2GB, the machines just won’t come up.
BTW, is there a reference for all the boot parameters and their meaning? That would be helpful. And in particular I am looking for a parameter to overwrite an installation, i.e. to reinstall/reapply an ignition to an already provisioned machine…