ipxe-shell bootenvs not working

[CoRfr]

I've tried to use the bootenv from dev-library/bootenvs/ipxeshell.yaml and can't seem to get it to work.
This is the syslinux config:

      DEFAULT local
      PROMPT 0
      TIMEOUT 10
      COM32 chain.c32
      APPEND grub/grub.pxe

First thing that it complains about is that local doesn't exist, so I added LABEL local before COM32 chain.c32, but then it also complains about the APPEND format, and I can't seem to find anything in https://wiki.syslinux.org/wiki/index.php?title=Comboot/chain.c32 regarding tftp.

However it does seem like pxechn.c32 would do the job ( https://wiki.syslinux.org/wiki/index.php?title=Pxechn.c32 ), so I tried that and it fails to run grub.pxe.

It says 'Booting ...' and then some garbage characters and it stopped.

I also try to use an ipxe.pxe with some embed config instead, so something like:

DEFAULT local
PROMPT 0
TIMEOUT 10
LABEL local
  COM32 pxechn.c32
  APPEND ipxe-mymachine.pxe

and it worked.

The original solution mentions something about efi, but it doesn't seem like pxechn.c32 would work in efi mode (I've not tested).

[sygibson]

Bertrand - It sounds like you worked through and found an issue ?

We're curious what you're trying to bootstrap? We might be able to help with alternate paths or information.

[CoRfr]

In the end it didn't work that well with pxechn.c32 as ipxe crashed (but it was executed a bit ...).
For now I ended-up putting ipxe-mymachine.pxe directly as the boot file for the subnet to skip ... well everything I guess :/
As this, it's simply replacing a previous instance of dnsmasq.

I already have an iPXE chain so I just wanted something on the DR side to, for some hosts, execute that iPXE chain. Now I'm back to all hosts as a workaround since I couldn't figure out how to execute that chain from a syslinux entrypoint.

As for what I'm trying to bootstrap:

• some hosts have a CoreOS booted from the network
• some hosts and VMs are running things like Ubuntu 16.04 / 18.04 (so far they are installed "manually", but that's where I'm hopping DR will assist)