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Re: [libvirt] [PATCH 02/13] qemu: do not support non-network disks without -drive



On 2013年03月11日 21:16, Paolo Bonzini wrote:
Il 11/03/2013 04:23, Osier Yang ha scritto:
On 2013年02月26日 01:44, Paolo Bonzini wrote:
QEMU added -drive in 2007, and NBD in 2008.  Both appeared first in
release 0.10.0.  Thus the code to support network disks without -drive
is dead, and in fact it incorrectly escapes commas.  Drop it.

The network disks support appeared in 0.8.7: Jan 4 2011 actually.

commit 036ad5052b43fe9f0d197e89fd16715950408e1d
Author: MORITA Kazutaka<morita kazutaka lab ntt co jp>
Date:   Mon Dec 6 16:24:09 2010 +0900

     add network disk support

     This patch adds network disk support to libvirt/QEMU.  The currently
     supported protocols are nbd, rbd, and sheepdog.  The XML syntax is like
     this:

         <disk type="network" device="disk">
           <driver name="qemu" type="raw" />
           <source protocol='rbd|sheepdog|nbd' name="...some image
identifier...">
             <host name="mon1.example.org" port="6000">
             <host name="mon2.example.org" port="6000">
             <host name="mon3.example.org" port="6000">
           </source>
           <target dev="vda" bus="virtio" />
         </disk>

     Signed-off-by: MORITA Kazutaka<morita kazutaka lab ntt co jp>

I believe -drive support is before 0.8.7, but how about libvirt is new
enough with the network disk support, and qemu too old without -drive
support?

Sorry for the confusion---I meant both -drive and NBD were in QEMU
0.10.0.  There is no released QEMU version that has only one of -drive
and NBD, and not even a source control commit that has NBD but not -drive.


It makes sense then, ACK.


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