[Libguestfs] virt-resize

[Richard W.M. Jones]

On Mon, Jun 25, 2012 at 12:55:11PM -0500, Dan The Man wrote:
> 
> 
> On Mon, 25 Jun 2012, Nikita A Menkovich wrote:
> 
> >You can write to UFS. It is rather safe. But you could not make a
> >resize of ufs filesystem on Linux. There is not utilities for this.
> >
> >On 25 June 2012 18:53, Richard W.M. Jones <rjones at redhat.com> wrote:
> >>On Mon, Jun 25, 2012 at 09:04:26AM -0500, Dan The Man wrote:
> >>>
> >>>
> >>>On Mon, 25 Jun 2012, Nikita A Menkovich wrote:
> >>>
> >>>>For now, UFS in Linux do not support resizing at all. There is only
> >>>>one way to resize: create new image, partition, attach to existing
> >>>>freebsd, install bootloader, sync files.
> >>>
> >>>
> >>>Don't think guestmount even supports ufs even if it is enabled either:
> >>>Did a quick download of this read only ufs module: rpm -i
> >>>kmod-ufs-0.0-1.el6.elrepo.x86_64.rpm
> >>>
> >>>cappy:~# modprobe ufs
> >>
> >>After downloading a kmod, you need to rebuild the libguestfs
> >>appliance.  Just do:
> >>
> >> rm -rf /var/tmp/.guestfs-*
> 
> Tried this but still got ufs unknown type ufs error.
[...]
> cappy:~# guestmount -a /dev/virtual/centos -m /dev/sda1:/ /centos
> cappy:~# umount /centos
> cappy:~# guestmount -a /dev/virtual/centos -m /dev/sda1:/:ro /centos
> libguestfs: error: mount_options: you must mount something on / first
> guestmount: '/dev/sda1' could not be mounted.  Did you mean one of these?
>         /dev/vda1 (ext4)
>         /dev/virtual/root (ext4)
>         /dev/virtual/swap (swap)
> cappy:~#
> 
> Just trying to pass a simple "ro" option, can't seem to get it to
> take any option even on a simple /boot mount on sda1?

Enable debugging to understand what's going on:

http://libguestfs.org/guestfs-faq.1.html#debugging_libguestfs

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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