[Libguestfs] appliance VM won't start, can't find /init, but /init is in the image.

[David Konerding]

On Tue, Aug 16, 2011 at 12:25 AM, Richard W.M. Jones <rjones at redhat.com>wrote:

> On Mon, Aug 15, 2011 at 08:49:01PM -0700, David Konerding wrote:
> [..]
>
> I forgot to add last night that your problem sounds like missing udev.
> If you get a process listing (ps ax) is udevd running?  On Ubuntu
> 11.04 in virt-rescue I get:
>
>   43 ?        S<s    0:00 /sbin/udevd --daemon
>  367 ?        S<     0:00 /sbin/udevd --daemon
>  368 ?        S<     0:00 /sbin/udevd --daemon
>
>
udevd is definitely there (I see 1 instance, not three).  udevd complains
about /dev/null being missing, and /dev is pretty empty (there is only a
kmsg file there).

The other big problem I see right now is that virtio-serial isn't working
properly (which is the ultimate message I see).  I'm trying to debug that a
bit by manually starting a simple KVM with the virtio-console flags and
seeing if that works.

Dave


> > OK.  I fixed the /sys problem: no /sys directory exists in the base
> image,
> > so mounting fails.  I edited inittab, and added mkdir /sys , this seems
> to
> > help.
> > Isn't this normally created by febootstrap?
>
> In Ubuntu 11.04 it's created by the initscripts package.
>
> > I have no fstab, but this doesn't really cause any problems AFAICT.
>
> This is correct in fact.  In the Ubuntu 11.04 appliance there is no
> /etc/fstab and it doesn't affect anything.
>
> > The next one is eth0.  The KVM invocation in test-tools is this; I see no
> > -net option to setup a network interface.
>
> eth0 isn't really important.  It's only added if you add the --network
> option to virt-rescue.
>
> I think there is something far more fundamental broken in your
> appliance.  Missing udev would be my guess.  Is /dev there?  What does
> it contain?
>
> For my Ubuntu 11.04 appliance:
>
>  # ls -l /dev/ | wc -l
>  175
>
> Rich.
>
> --
> Richard Jones, Virtualization Group, Red Hat
> http://people.redhat.com/~rjones
> virt-df lists disk usage of guests without needing to install any
> software inside the virtual machine.  Supports Linux and Windows.
> http://et.redhat.com/~rjones/virt-df/
>
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