[Bug 1787630] Re: [FFe] Include HTTP support in pre-build GRUB module

[Łukasz Zemczak]

Thank you for the FFe! It's really late for a feature freeze exception
though, especially that we're now in Final Freeze. This means we
shouldn't risk with anything 'risky' that isn't directly a release
blocker for cosmic - which doesn't seem to be the case here. So for now,
both me and Laney think that this should go rather as an SRU instead.

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https://bugs.launchpad.net/bugs/1787630

Title:
  [FFe] Include HTTP support in pre-build GRUB module

Status in grub2 package in Ubuntu:
  New

Bug description:
  {Description]
  Grub supports booting files over the network via both FTP/HTTP. However, the Ubuntu package is not built with the grub HTTP modules. Enabling this would allow grub to obtain files over HTTP (such as initrd/kernel).

  [Rationale]
  Enabling HTTP support for Grub would allow MAAS to use such functionality to boot files over the network with HTTP. This allows for improvement performance (vs using ftp) and for better security.

  MAAS would use this to download kernel and initrd over HTTP instead of
  FTP at first for performance improvements.

  [Original bug report]

  GRUB has builtin support for HTTP via http.mod. This module is not
  being included in the prebuild grubnetx64.efi. All that should be
  required is adding the http module. I also suggest building
  grubnetx64.efi using GRUB modules to include lvm and RAID support this
  will allow grubnetx64.efi to local boot in all situations.

  --- build-efi-images	2018-08-17 10:50:35.124311043 -0700
  +++ build-efi-images.new	2018-08-17 10:50:59.270661126 -0700
  @@ -148,8 +148,9 @@
    raid5rec
    raid6rec
    "
  -NET_MODULES="$CD_MODULES
  +NET_MODULES="$GRUB_MODULES
    tftp
  +	http
    "

   "$grub_mkimage" -O "$platform" -o "$outdir/gcd$efi_name.efi" \

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