xen discuss - Dec 2009 - Using raw ZFS partition as XEN disks.Help with syntax.

Please advise on right syntax to use raw zfs partitions as XEN disks

I create ZFS this way

zfs create rpool/vm2/win2008sbs/system

and then try to create DomU with the following configuration:

disk = [ ''phy:/rpool/vm2/win2008sbs/system,hda,w''
        , ''file:/rpool/vm2/iso/sbs_2008.iso,hdc:cdrom,r''
        ]


But when try to tun it I get this error:

Error: Device 768 (vbd) could not be connected. error:
"/rpool/vm2/win2008sbs/system" is not a valid block device.

What I''m doing wrong ?

Thanks a lot.
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This message posted from opensolaris.org

On 12/26/2009 07:33 PM, Alxen4 wrote:
> Please advise on right syntax to use raw zfs partitions as XEN disks
>
> I create ZFS this way
>
> zfs create rpool/vm2/win2008sbs/system
>
> and then try to create DomU with the following configuration:
>
> disk = [ ''phy:/rpool/vm2/win2008sbs/system,hda,w''
>          , ''file:/rpool/vm2/iso/sbs_2008.iso,hdc:cdrom,r''
>          ]
>
>
> But when try to tun it I get this error:
>
> Error: Device 768 (vbd) could not be connected. error:
"/rpool/vm2/win2008sbs/system" is not a valid block device.
>
> What I''m doing wrong ?
>
> Thanks a lot.
>    
Create a virtual volume:

     zfs create rpool/guests
     zfs create -V 20G rpool/guests/win2008sbs

then use the corresponding zvol:

     virt-install \
         --hvm \
         --os-type windows \
         --os-variant win2003 \
         -n win2008sbs \
         -f /dev/zvol/dsk/rpool/guests/win2008sbs \
         --cdrom /rpool/vm2/iso/sbs_2008.iso \
         --vnc \
         --vcpus=1 \
         -r 1024




-- 
------------------------------------------------------------------------
* E. Mike Durbin *
Architecture Manager
*Sun Microsystems, Inc.*
2 Pierce Place, Suite 1700
Itasca, IL 60143 US
Phone +1 630 285 7710
Mobile +1 630 965 7710
Fax +1 630 285 8752
Email emike@Sun.COM

Thanks,I will try this,but could you please show me the right syntax for 
xm(not virsh) configuration file.

thanks again.
-- 
This message posted from opensolaris.org

>         --hvm \
>         --os-type windows \
>         --os-variant win2003 \
>         -n win2008sbs \
>         -f /dev/zvol/dsk/rpool/vm2/win2008sbs \
>         --cdrom /rpool/vm2/iso/sbs_2008.iso \
>         --vnc \
>         --vcpus=1 \
>         -r 1024

I tried that and got an error


ERROR    Error with storage parameters: The path
''/dev/zvol/dsk/rpool/vm2/win2008sbs'' must be a file or a
device, not a directory


Thanks.
-- 
This message posted from opensolaris.org

On Sun, Dec 27, 2009 at 12:07 PM, Alxen4 <yuri@cmsintegra.com>
wrote:
> I tried that and got an error
>
>
> ERROR    Error with storage parameters: The path
''/dev/zvol/dsk/rpool/vm2/win2008sbs'' must be a file or a
device, not a directory
Do you know the difference between file, file system, and block device?

You previously have a FILE SYSTEM rpool/vm2/win2008sbs/system. That
means you have some DIRECTORIES like /rpool/vm2/win2008sbs/system (the
filesystem mount point) and /dev/zvol/dsk/rpool/vm2/win2008sbs (a
placeholder for zvols under it).

xen needs either a FILE or a BLOCK DEVICE. Mike mentioned an example
to create a "virtual volume" or zvol (basically a block device) which
you can use. So if you''ve done something like this (note
"-V")

zfs create -V 20G rpool/vm2/win2008sbs/systemdisk

you can use it in domU config file like this

disk = [
''phy:/dev/zvol/dsk/rpool/vm2/win2008sbs/systemdisk,hda,w'' ]

-- 
Fajar

Got it....The "-V" option that what I was missing...
Ok.It works.
But now I''m facing different issue.
I guess the filesystem created with "-V" is of type ''block
device'',so it has no mountpoint.

zfs list

rpool/vm2/win2008sbs/system      20G   410G    16K  -


When I try to set mountpoint like that ,I get an error:

zfs set mountpoint=/rpool/vm2/win2008sbs/system rpool/vm2/win2008sbs/system

cannot set property for ''rpool/vm2/win2008sbs/system'':
''mountpoint'' does not apply to datasets of this type

So how could I access an actual data under that filesystem(i.e. through ls
<foldername>) if it has no mountpoint ?

(I''m very new to Solaris,sorry if it''s a dumb question)

Thanks.
-- 
This message posted from opensolaris.org

On Sun, Dec 27, 2009 at 1:46 PM, Alxen4 <yuri@cmsintegra.com>
wrote:
> I guess the filesystem created with "-V" is of type
''block device'',so it has no mountpoint.
yes..
> When I try to set mountpoint like that ,I get an error:
>
> zfs set mountpoint=/rpool/vm2/win2008sbs/system rpool/vm2/win2008sbs/system
>
> cannot set property for ''rpool/vm2/win2008sbs/system'':
''mountpoint'' does not apply to datasets of this type
>
> So how could I access an actual data under that filesystem(i.e. through ls
<foldername>) if it has no mountpoint ?
A zvol is similar to a disk. Since (assuming from the path) you''ll use
Windows 2008 with ntfs on it, you can''t (normally) access the data on
solaris. Because solaris doesn''t have native ntfs support. If you need
to access the data you need to assign the disk to Windows (or Linux)
domU (or share the zvol via iscsi), and mount the partition there.

You can access ntfs on solaris via fuse and ntfs-3g (something like
http://blogs.sun.com/AlokChakrabarty/entry/how_to_mount_ntfs_and), but
AFAIK it''s still considered experimental, so I wouldn''t
recommend it.

-- 
Fajar

Everything is clear now.
Thanks for excellent explanation.
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