[Libguestfs] Virt-rescue problem

[Suvajit Sarkar]

Thank You for your reply.
>What was the output of the 'virt-rescue --suggest -d XYZ'?
Inspecting the virtual machine or disk image ...

This disk contains one or more operating systems.  You can use these mount
commands in virt-rescue (at the ><rescue> prompt) to mount the filesystems.

# /dev/sda1 is the root of a linux operating system
# type: linux, distro: ubuntu, version: 12.4
# Ubuntu 12.04.3 LTS

mount /dev/sda1 /sysroot/
mount --bind /dev /sysroot/dev
mount --bind /dev/pts /sysroot/dev/pts
mount --bind /proc /sysroot/proc
mount --bind /sys /sysroot/sys

>And did you run _all_ those commands?
yes I run all those commands in this sequence:
virt-rescue --network -d XYZ
mount /dev/sda1 /sysroot/
chroot /sysroot
update-initramfs -c -k 3.2.0-58-generic

But it failed with following error:
update-initramfs: failed for /boot/initrd.img-3.2.0-58-generic with 1.

Actually one of my VM in KVM platform got corrupted.When I try to start
it,I get the menu and after selecting Ubuntu, with Linux 3.2.0-58-generic
it gives an error "Kernel Panic - not Syncing: VFS: Unable to mount root fs
on unknown-block(0,0).So I thought of updating the initramfs to see if the
problem is resolved.But updation is failing.Your valuable suggestion is
awaited.

On Tue, Dec 2, 2014 at 11:05 PM, Richard W.M. Jones <rjones at redhat.com>
wrote:

> On Tue, Dec 02, 2014 at 02:26:49PM +0000, Suvajit Sarkar wrote:
> > Hello,
> > I am trying to run this command
> > virt-rescue --suggest -d XYZ
> > virt-rescue --network -d XYZ
> > the prompt is looking like this:
> > I have no name!@(none):
>
> This is probably:
> https://bugzilla.redhat.com/show_bug.cgi?id=812970
> It is supposed to be fixed in libguestfs >= 1.28.
>
> > now I mounted the root partition suggested by virt-rescue to /sysroot
> > then chroot /sysroot
> > after that I tried to rebuild an initrd.img with the following command
> >
> > update-initramfs -c -k 3.2.0-58-generic
> >
> > But it failed with following error:
> > update-initramfs: failed for /boot/initrd.img-3.2.0-58-generic with 1.
>
> What was the output of the 'virt-rescue --suggest -d XYZ'?
>
> And did you run _all_ those commands?
>
> > Also when running  apt-get update , it fails saying "no address
> associated
> > with hostname.
>
> Likely you need to copy /etc/resolv.conf to /sysroot/etc/resolv.conf
> as well, so that name resolution works inside the chroot.
>
> > host configuration:ubuntu 14.04
> > guest:ubuntu 12.04
>
> Rich.
>
> --
> Richard Jones, Virtualization Group, Red Hat
> http://people.redhat.com/~rjones
> Read my programming and virtualization blog: http://rwmj.wordpress.com
> libguestfs lets you edit virtual machines.  Supports shell scripting,
> bindings from many languages.  http://libguestfs.org
>



-- 
Thanks and regards,
Suvajit Sarkar
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/libguestfs/attachments/20141203/bffc99e2/attachment.htm>