uc20 grubenv block seems odd

[Dimitri John Ledkov]

uc20 grubenv block seems to be in the wrong location

it seems to be at (UbuntuSeed)/boot/grub/grubenv

but it should be at (UbuntuSeed)/EFI/ubuntu/grubenv

or i should change the location of which env is loaded in the grub.cfg script

[Dimitri John Ledkov (xnox)]

Actually this might be a snapd bug!

[Dimitri John Ledkov (xnox)]

I think there is disconnect how ESP looks on disk, and how things are mounted (bound mounted) on the running system.

I.e. whilst grubenv is preped/written to /boot/grub/grubenv it is actually located at (should be located at) EFI/ubuntu/grubenv

[Dimitri John Ledkov (xnox)]

So....

I think grubenv at ubuntu-image creation time should be written to EFI/ubuntu/grubenv, not to boot/grub/grubenv, despite the fact that that is where it is at runtime.

I expect no /var/ directory on the UbuntuSeed partition.

I expect no /snaps/ directory on the UbuntuSeed partition.

But this is me probably reading the code wrong! Or the fact that many different pieces are out-of-date / incompatible from each other.

So I am attaching what is current.txt in the UbuntuSeed partition, and what initrd seems to expect. Please check/validate if that makes sense or is wrong and need changes! And then we need to make like ubuntu-image and/or snap prepare-image to do the expect things on disk, and then adjust gadget|initramfs to match that.

[Dimitri John Ledkov (xnox)]

Or is like top level /snaps expected to be a "pool" and like systems/$date/snaps/aux-info.json has points to the right /snaps? But then what is /var/lib/snapd/snaps/*.snap -> just redundant copies?

[John Lenton (chipaca)]

Is there something snapd needs to do, here?

[Dimitri John Ledkov (xnox)]

I think this is now done, at least in edge.

$ cat systems/20191210/grubenv
# GRUB Environment Block
snapd_recovery_kernel=/snaps/pc-kernel_359.snap

Looks good.