Re: grub2-mkconfig with root on rootfs

[Andrey Borzenkov]

В Wed, 02 Oct 2013 00:13:29 +0400
Peter Volkov <address@hidden> пишет:

> 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

This was not present in mntinfo output. How should others guess it?

>                                         and then I run:
> 
> grub2-install /dev/sdc --boot-directory=/mnt/root/
> 
> Then my "/boot/grub" is located at (hd0, msdos1)/grub.
> 

You did not show any output from this command, so I assume this command
completes without error?