Split epoxy.ip= kernel parameter into multiple parameters

[stephen-soltesz]

The current format for epoxy.ip= is borrowed from the kernel's built-in format for ip=, which comes from the nfs module. The ip= format has become an unofficial convention among fedora kickstart installations, as well as for some parts of coreos first-boot automation. However, this compact network configuration does not allow us to encode IPv6 addresses.

So, we should split the epoxy.ip= field into these new fields:

• epoxy.ipv4=<address>,<netmask>,<gateway>
• epoxy.ipv6=<address>,<netmask>,<gateway>
• epoxy.interface=<name>[,<auto-conf?>,<other things>]
• epoxy.hostname=<name>

[stephen-soltesz]

Or, how about:

• epoxy.ipv4=<address>/<mask>,<gateway>,<dns1>,<dns2>
• epoxy.ipv6=<address>/<mask>,<gateway>,<dns1>,<dns2>

It becomes the responsibility of the receiving code to correctly parse and interpret the address and mask. This is more concise than the long-form netmask. And, probably more natural for ipv6.

[stephen-soltesz]

Configs & scripts that need to be updated to support the new form:

Configs:

• stage1to2.ipxe
• all kargs from later nextboot configs

Scripts:

• stage2 rc.local
• mlxupdate & ISO parameters
• coreos generic network config