[Please keep replies on the list so that others can benefit
from the answers]
On Mon, Jun 25, 2012 at 07:13:49AM -0500, Dan The Man
wrote:> Hmmm well I beleive the only way I can think to do it is enlarge the lv
> in linux as usual , then have to boot into freebsd , modify the
> partition table for rest of sectors and use the growfs command, even
> that is problematic seeing the partition cannot be mounted
> regardless. Might be worth reading source code to growfs.c in
> freebsd source tree or just trying a zfs root install to see if it
> happens automatically.
>
> I did have a question after playing more with linux virtualization
> maybe you could shed some light on, I was wondering how to mount
> lv's inside guests.
>
> cappy:~# ls /dev/mapper
> control virtual-centos virtual-centos_new virtual-freebsd
> virtual-freebsd_new virtual-windows7 virtual-windows8
> cappy:~# virsh start centos
> Domain centos started
>
> cappy:~# kpartx -av /dev/virtual/centos
> add map virtual-centos1 (253:6): 0 512000 linear /dev/virtual/centos 2048
> add map virtual-centos2 (253:7): 0 20457472 linear
> /dev/virtual/centos 514048
> cappy:~# ls /dev/mapper
> control virtual-centos virtual-centos1 virtual-centos2
> virtual-centos_new virtual-freebsd virtual-freebsd_new
> virtual-windows7 virtual-windows8
> cappy:~# virt-filesystems --long --parts --blkdevs -h -a
> /dev/virtual/centos
> Name Type Size Parent
> /dev/sda1 partition 250M /dev/sda
> /dev/sda2 partition 9.8G /dev/sda
> /dev/sda device 10G -
> cappy:~# virt-filesystems -lh -a /dev/virtual/centos
> Name Type VFS Label Size
> /dev/sda1 filesystem ext4 - 250M
> /dev/virtual/root filesystem ext4 - 7.8G
> cappy:~# mount /dev/mapper/virtual-centos1 /centos
>
> OK but now how do I mount that /dev/virtual/root since its a lvm on
> /dev/sda2 ?
With libguestfs you'd use guestmount to do this:
guestmount -a /dev/virtual/centos -m /dev/virtual/root /tmp/mnt
There's no need to use kpartx.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
libguestfs lets you edit virtual machines. Supports shell scripting,
bindings from many languages. http://libguestfs.org
