Xen users - Jan 2011 - How to add 2 physical scsi drives to ubuntu fileshare VM on XCP 0.50

All,I''m new to XEN and cloud computing.  I''ve successfully
setup XCP 0.50 and my first domU (a mailserver running on Debian 5.0). 
I''m now going for my second domU - a fileserver running Ubuntu 10.04LTS
64-bit server but I have one question:
I have 2 500GB SCSI drives full of files (one formatted as EXT3, the other XFS)
I''d like the fileshare domU I''m going to create to access
these disks directly (or flow through some sort of virtual container) without
having to reformat or migrate.  My desire is to be able to take these drives out
and plug them into another machine without having to do much fussing around to
access the files.
I''ve googled for the past few days and found nothing helpful.  Can
anyone provide me some insight on how best to accomplish this or point me to a
good resource that can help me out?Thanks kindly,Dave

 		 	   		  

_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

On Sun, Jan 2, 2011 at 12:09 AM, David Oh <davidohonline@hotmail.com>
wrote:
> All,
> I''m new to XEN and cloud computing.  I''ve successfully
setup XCP 0.50 and my
> first domU (a mailserver running on Debian 5.0).  I''m now going
for my
> second domU - a fileserver running Ubuntu 10.04LTS 64-bit server but I have
> one question:
> I have 2 500GB SCSI drives full of files (one formatted as EXT3, the other
> XFS) I''d like the fileshare domU I''m going to create to
access these disks
> directly (or flow through some sort of virtual container) without having to
> reformat or migrate.  My desire is to be able to take these drives out and
> plug them into another machine without having to do much fussing around to
> access the files.
> I''ve googled for the past few days and found nothing helpful.  Can
anyone
> provide me some insight on how best to accomplish this or point me to a
good
> resource that can help me out?
> Thanks kindly,
> Dave
>
>
> _______________________________________________

The easy way is to export the drives via NFS / CIFS on dom0 and mount
then on domU :)


-- 
Kind Regards
Rudi Ahlers
SoftDux

Website: http://www.SoftDux.com
Technical Blog: http://Blog.SoftDux.com
Office: 087 805 9573
Cell: 082 554 7532

_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

David Oh wrote:
>I''m now going for my second domU - a fileserver running Ubuntu 
>10.04LTS 64-bit server but I have one question:
>
>I have 2 500GB SCSI drives full of files (one formatted as EXT3, the 
>other XFS) I''d like the fileshare domU I''m going to create
to access
>these disks directly (or flow through some sort of virtual 
>container) without having to reformat or migrate.  My desire is to 
>be able to take these drives out and plug them into another machine 
>without having to do much fussing around to access the files.
As I read it - you have these disks full of files, you want to mount 
them on the DomU, and then share them from that ?

Just add additional virtual disk declarations to your client config 
and they''ll appear to the client. There are two ways to do it, which 
you choose is a matter of personal preference and what else you run 
on the machine.


Option 1 : give the whole disk to the client.

In the client config on your Dom0, give the device name of the whole 
disk (eg /dev/sdc) as the device.
Eg:
disk = [ ''phy:/dev/vg0/filesrversystem,xvda1,w'',
''phy:/dev/sdc,xvda2,w'' ]

In the DomU, you''ll now find you have a disk (/dev/xvda2 in this 
case) that is partitioned - so you''d mount /dev/xvda1 etc.


Option 2 : pass individual partitions

This is what I do - partly because I run multiple clients and have a 
lot of LVM volumes all on the same (raid) disk. Eg :
disk    = [ ''phy:/dev/vg0/filesrverroot,xvda1,w'', 
''phy:/dev/vg0/filesrvervar,xvda2,w'',
''phy:/dev/vg0/filesrver
swap,xvda3,w'', ''phy:/dev/sdc1,xvda2,w'' ]

assuming in this case that /dev/sdc1 is the partition with all your 
files on it.

-- 
Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.

_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

On Monday 03 January 2011 18:54:56 Rudi Ahlers wrote:
> On Sun, Jan 2, 2011 at 12:09 AM, David Oh <davidohonline@hotmail.com>
wrote:
> > All,
> > I''m new to XEN and cloud computing.  I''ve
successfully setup XCP 0.50 and
> > my first domU (a mailserver running on Debian 5.0).  I''m now
going for
> > my second domU - a fileserver running Ubuntu 10.04LTS 64-bit server
but
> > I have one question:
> > I have 2 500GB SCSI drives full of files (one formatted as EXT3, the
> > other XFS) I''d like the fileshare domU I''m going to
create to access
> > these disks directly (or flow through some sort of virtual container)
> > without having to reformat or migrate.  My desire is to be able to
take
> > these drives out and plug them into another machine without having to
do
> > much fussing around to access the files.
> > I''ve googled for the past few days and found nothing helpful.
Can anyone
> > provide me some insight on how best to accomplish this or point me to
a
> > good resource that can help me out?
> > Thanks kindly,
> > Dave
> > 
> > 
> > _______________________________________________
> 
> The easy way is to export the drives via NFS / CIFS on dom0 and mount
> then on domU :)

The better and probaly easiest way is creating two local SCSI storage 
resources which provide domU access to the block devices without additional 
LVM layer.

There''s no need to install and/or configure NFS or CIFS server
software/shares
and to deal with whose overhead.

Please let me know if you like to get mailed the SCSISR python script.

Christian

_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users