Re: grub2-mkconfig with root on rootfs

[Peter Volkov]

В Вт, 01/10/2013 в 17:18 +0400, Andrey Borzenkov пишет:
> On Tue, Oct 1, 2013 at 3:41 PM, Peter Volkov <address@hidden> wrote:
> > В Вт, 01/10/2013 в 10:59 +0400, Andrey Borzenkov пишет:
> >> On Tue, Oct 1, 2013 at 1:51 AM, Peter Volkov <address@hidden> wrote:
> >> > We are using may be strange but rather convenient scheme of booting
> >> > linux where real system root is all inside initramfs (/init is symlink
> >> > to /sbin/init). Everything works fine but grub2-mkconfig that ends out
> >> > the error:
> >> >
> >> > /usr/sbin/grub2-probe: error: failed to get canonical path of `rootfs'.
> >> >
> >> > Sure with root on rootfs this grub2-probe is not supposed to work.
> >> >
> >> > # mount | grep ' / '
> >> > rootfs on / type rootfs (rw)
> >>
> >> Could you show full /proc/mounts (or even better, /proc/self/mountinfo)?
> >
> > Yup, here is /proc/self/mountinfo:
> > 1 1 0:1 / / rw - rootfs rootfs rw
> 
> OK so do I understand it correctly - you are running purely from
> initramfs and do not have any additional filesystems?

yup.

> On which device do you install grub? Where is your /boot/grub located?
> 
> Please show full command line and its output used to install grub.

I have single hard drive /dev/sdc with two partitions. First partition
is formatted with ext4 (second partition is unformatted yet). To install
grub I mount it to /mnt/root/ directory and then I run:

grub2-install /dev/sdc --boot-directory=/mnt/root/

Then my "/boot/grub" is located at (hd0, msdos1)/grub.

--
Peter.