coreos-install iso embed --no-initramfs-networking

[cgwalters]

For the use case of static IPs on bare metal, we have coreos-install iso embed to insert Ignition, but that still has an implicit requirement on DHCP.

Let's add an option to embed that turns it off, like:

$ coreos-install iso embed --no-initramfs-networking -c /path/to/config.ign /path/to/foo.iso

[bgilbert]

This seems like a special case of a more general thing I've proposed before (though apparently I never filed a bug about it): provide an option for embedding any karg interpreted by Dracut, including the networking options generally. It'd be easy to implement (drop a file in /etc/cmdline.d in the CPIO archive), but a hard distinction to make to the user, who can't be expected to know which kargs are implemented where.

Thoughts?

[cgwalters]

Definitely related, although this gets into a few interesting details - among them that there's not really a standard way to remove a kernel argument, which is relevant here for disabling networking that is enabled by default.

[jlebon]

We wouldn't need to remove a karg I think, just append rd.neednet=0. And hmm... actually, it'd probably work today to do coreos-installer install --firstboot-args rd.neednet=0?

[bgilbert]

I'd guess rd.neednet=0 would work. The issue is the live ISO boot, not the boot of the installed system, so --firstboot-args is too late.

[cgwalters]

I guess we could generalize this to --initialboot-args. I agree that appending rd.neednet=0 likely works in practice and would be fine, but it just feels less clean than actually removing the argument.

[jlebon]

This is part of the more generic conditional networking issue: coreos/fedora-coreos-tracker#443.

[dustymabe]

For the use case of static IPs on bare metal, we have coreos-install iso embed to insert Ignition, but that still has an implicit requirement on DHCP.

After coreos/fedora-coreos-config#326 the Live ISO image no longer requires DHCP.

[jlebon]

The ISO (as with all the other artifacts) no longer default to initramfs networking. So closing this.