Andrew,
Thanks for the reply - see inline comments:
On Tue, 2006-12-26 at 08:23 -0500, Andrew Cathrow wrote:
> Let's say that your image is called /var/lib/xen/images/disk.img
>
> First you need to access that file like a loopback device
>
> losetup -f /var/lib/xen/images/disk.img
>
> that will create a device like /dev/loop0
OK, that seemed to work.
> If you run "losetup -a" you'll get a list of the loopback devices that
> are configured.
I get:
/dev/loop0: [0344]:49158 (/home/fc6v1)
> Lets presume that it was /dev/loop0 that was created.
Correct.
> You have a device now but you don't have partitions yet.
> You can do fdisk -l /dev/loop0 to see what partitions are in the
> loopback device but you can't access them yet.
I get:
Disk /dev/loop0: 1610 MB, 1610612736 bytes
255 heads, 63 sectors/track, 195 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/loop0p1 * 1 195 1566306 83 Linux
> You need to use kpartx to add the partition mappings.
>
> kpartx -a /dev/loop0
>
> This will add partition mappings under /dev/mapper.
I now have:
brw-rw---- 1 root disk 253, 0 Dec 27 04:32 loop0p1
> You should now be able to access these like regular partitions.
> If you used LVM during your install then you'll need to do a vgscan
> and a vgchange -ay to activate the volume groups.
> Now you can mount the partitions/logical volumes.
Yes, when I do:
mount /dev/mapper/loop0p1 /mnt
I can then see all the directories under /mnt!
> At this point I hope you didn't use the default partitioning for both
> the guest and the host, otherwise you'll have duplicate VG names.
No, I used one big 1.5GB partition - I avoid using LVM usually anyway.
Many thanks!
Now I just have to work out how to get a REALLY minimal guest install -
a la The RULE Project or The FedoraCD project, although as an exercise I
will probably reduce the RPMs in the current guest as much as possible
myself to begin with.
Regards,
Phil.
> There is a way to rename volume groups but that's a story for another
> day .....
>
>
>
> On Tue, 2006-12-26 at 19:28 +1100, Phil Rhoades wrote:
> > People,
> >
> > Firstly, congratulations on some nice work! - I could not get
> > inter-guest or host-guest networking on FC5 but it started working
> > immediately on FC6 - thanks!
> >
> > On a FC6 host I have created a FC6 guest minimal install (everything
> > checked off except for text networking) in a 1.5GB image file. What is
> > the format of this image? Is it possible to somehow use a loopback
> > switch to mount it like iso9660? - I want to be able to make a copy of
> > the image file; in the image, edit the /etc/sysconfig/network
> > and /etc/sysconfig/network-scripts/ifcfg-eth0 files; add an
> > appropriate /etc/xen config file and then be able to boot a second
> > guest. Is this possible somehow?
> >
> > Thanks,
> >
> > Phil.
--
Philip Rhoades
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