Fedora xen - Nov 2007 - Attaching a virtual CD to an existing domu?

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I have a Debian Etch system, I want to install more software and it''s 
asking for the DVD.

I created the system a few days ago, I think this is the commaind I used:

virt-install --name=DebianEtch --ram=384 --vcpus=1 
--file=/var/lib/xen/images/DebianEtch.img  --file-size=3 --vnc --hvm 
--cdrom=/var/lib/xen/images/debian-40r1-i386-DVD-1.iso   --os-type=unix


I''ve tried various incantations:
[root@potoroo mail]# virsh attach-disk DebianEtch 
/var/lib/xen/images/debian-40r1-i386-DVD-1.iso /dev/hde --driver file 
--type cdrom --mode readonly
libvir: Xen Daemon error : POST operation failed: (xend.err ''Device
8448
not connected'')

[root@potoroo mail]# virsh attach-disk DebianEtch 
/var/lib/xen/images/debian-40r1-i386-DVD-1.iso /dev/hdc --driver file 
--type cdrom --mode readonly
libvir: Xen Daemon error : POST operation failed: (xend.err "Refusing to 
reconfigure device vbd:5632 to {''uname'': 
''file:/var/lib/xen/images/debian-40r1-i386-DVD-1.iso'',
''mode'': ''r'',
''dev'': ''/dev/hdc:cdrom''}")

[root@potoroo mail]# virsh attach-disk DebianEtch 
/var/lib/xen/images/debian-40r1-i386-DVD-1.iso /dev/hdb --driver file 
--type cdrom --mode readonly
libvir: Xen Daemon error : POST operation failed: (xend.err ''Device 832
not connected'')

[root@potoroo mail]#


None of those messages gives me any idea of what''s wrong.

I tried the xm command too:
This is based on the manual page. The man page is wrong:
xm block-attach DebianEtch 
file://var/lib/xen/images/debian-40r1-i386-DVD-1.iso  /dev/hdd ro


DebianEtch thinks its CD drive is /dev/hdc, so I really want the CD 
attached to that.
[root@potoroo mail]# xm block-attach DebianEtch 
file://var/lib/xen/images/debian-40r1-i386-DVD-1.iso  /dev/hdc r
Error: Device /dev/hdc (5632, vbd) is already connected.
Usage: xm block-attach <Domain> <BackDev> <FrontDev>
<Mode> [BackDomain]

Create a new virtual block device.
[root@potoroo mail]#

This seems to work:
[root@potoroo mail]# xm block-attach DebianEtch 
file://var/lib/xen/images/debian-40r1-i386-DVD-1.iso  /dev/hdb r
[root@potoroo mail]#

but DebianEtch doesn''t know about it.

How _should_ this work?

I note block-detach doesn''t seem to do anything:
[root@potoroo mail]# xm block-detach DebianEtch  832
[root@potoroo mail]# xm block-detach DebianEtch  5696
[root@potoroo mail]# xm block-detach DebianEtch  5632
[root@potoroo mail]# xm list DebianEtch --long | less
[root@potoroo mail]# xm block-list DebianEtch
Vdev  BE handle state evt-ch ring-ref BE-path
768    0    0     1      -1     -1    /local/domain/0/backend/vbd/3/768
5632    0    0     1      -1     -1    /local/domain/0/backend/vbd/3/5632
5696    0    0     1      -1     -1    /local/domain/0/backend/vbd/3/5696
832    0    0     1      -1     -1    /local/domain/0/backend/vbd/3/832
[root@potoroo mail]#


Is there a particular reason the install DVD image doesn''t, by default,
remain attached?

-- 

Cheers
John

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Please do not reply off-list

John Summerfield wrote:
> Is there a particular reason the install DVD image doesn''t, by
default,
> remain attached?
There''s a (faulty) assumption here that after the first boot the DVD 
image is no longer needed, so we unmount it.  This is/was due to be 
fixed (mainly because it''s completely the wrong thing to do for
Windows)
but my Bugzilla-fu isn''t up to it this morning and I can''t
find the
tracker bug.

Anyway, easiest thing in Debian is probably just to edit 
/etc/apt/sources.list and remove the CD-ROM lines.  With those removed, 
apt will just go to the network to get updates rather than trying and 
failing to mount local CDs.

Rich.

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