On Wed, Aug 19, 2009 at 04:17:41PM +0100, Simon Hobson wrote:
> I wrote:
>
> >It may be possible to detatch a volume and re-attach it with xm but
> >I've never done that.
>
> Well now I have. Advance planning says I'll need a bit more space on
> a volume, and there was a little bit of space available on the iSCSI
> box (so a case of grab it while it's there, before someone else does
> !).
>
> Unmounted the volume in the guest, then :
>
> # cat backup
> <stuff deleted>
> disk = [ 'phy:vg0/backuproot,xvda1,w',
> 'phy:vg0/backupvar,xvda2,w',
> 'phy:/dev/disk/by-path/ip-<very-long-iscsi-address>,xvda3,w',
> 'phy:vg0/backupswap,xvda4,w' ]
>
> # xm list
> Name ID Mem VCPUs State
> Time(s)
> Domain-0 0 486 4 r-----
> 67982.4
> backup 11 511 2 -b----
> 135441.2
>
> # xm block-detach 11 xvda3
>
> <do any other steps required, such as altering partitions or resizing
> LVM volumes>
>
> # xm block-attach 11 '/dev/disk/by-path/ip-<very-long-iscsi-address>'
> /dev/xvda3 r
> Error: Device 51715 (vbd) could not be connected. Hotplug scripts not
> working.
> Usage: xm block-attach <Domain> <BackDev> <FrontDev> <Mode> [BackDomain]
>
> Create a new virtual block device.
>
> Checked in teh guest and the device didn't re-appear, so tried again :
>
> # xm block-attach 11 '/dev/disk/by-path/ip-<very-long-iscsi-address>'
> /dev/xvda3 r
> Error: Device /dev/xvda3 (51715, vbd) is already connected.
> Usage: xm block-attach <Domain> <BackDev> <FrontDev> <Mode> [BackDomain]
>
> Create a new virtual block device.
>
>
> So I still had to shutdown and re-create the guest for the size
> change to appear.
>
You need to attach a completely new device, not the same xvda3.
-- Pasi
>
>
> >In any case, at least with ext3, you need the filesystem unmounted
> >in order to resize it.
>
> As "Bart Van Kerckhove" <bart@xxxxxxxx> pointed out, you can do
> online resize of an ext3 filesystem :
>
> # df -h /store
> Filesystem Size Used Avail Use% Mounted on
> /dev/xvda3 99G 44G 51G 47% /store
>
> # resize2fs /dev/xvda3
> resize2fs 1.41.3 (12-Oct-2008)
> Filesystem at /dev/xvda3 is mounted on /store; on-line resizing required
> old desc_blocks = 7, new_desc_blocks = 10
> Performing an on-line resize of /dev/xvda3 to 39321087 (4k) blocks.
> The filesystem on /dev/xvda3 is now 39321087 blocks long.
>
> # df -h /store
> Filesystem Size Used Avail Use% Mounted on
> /dev/xvda3 148G 44G 97G 31% /store
> --
> 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@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users
|
Home