Public bug reported:
MAAS uses the signed network GRUB bootloader when a machine network
boots on AMD64 and ARM64. The configuration MAAS produces depends on the
machine which are identified by MAC address. The default grub.cfg in the
boot loader downloads /grub/grub.cfg from the remote host. As that
doesn't provide the MAC address MAAS provides a default configuration
file:
configfile /grub/grub.cfg-${net_default_mac}
configfile /grub/grub.cfg-default-amd64
There are two issues with this:
1. This causes an additional unnecessary request.
2. It is assumed an known machine is amd64.
Can the default grub.cfg embedded in grubnet<arch>.efi be updated to
configfile /grub/grub.cfg-${net_default_mac}
configfile /grub/grub.cfg-default-<ARCH>
configfile /grub/grub.cfg
This would be similar to what PXELinux[1] does.
[1] https://wiki.syslinux.org/wiki/index.php?title=PXELINUX
** Affects: grub2-signed (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1923268
Title:
grubnet default grub.cfg should try /grub/grub.cfg-${net_default_mac}
before /grub/grub.cfg
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