On Wed, Mar 18, 2015 at 5:33 PM, Shanzhi Yu <shyu(a)redhat.com> wrote:
------------------------------
*From: *"Deepak Shetty" <dpkshetty(a)gmail.com>
*To: *libvir-list(a)redhat.com
*Sent: *Wednesday, March 18, 2015 7:19:05 PM
*Subject: *[libvirt] Domain XML isn't dumping full backing chain
Hi,
I am using libvirt version 1.2.9.2 on F21 and i am unable to get the
complete backing chain info in the virsh dumpxml output. Details below :
*My backing chain per qemu-img :*
[stack@devstack-f21 test]$ qemu-img info --backing-chain snap4.qcow2
image: snap4.qcow2
file format: qcow2
virtual size: 1.0G (1073741824 bytes)
disk size: 196K
cluster_size: 65536
backing file: ./snap3.qcow2
Format specific information:
compat: 1.1
lazy refcounts: false
image: ./snap3.qcow2
file format: qcow2
virtual size: 1.0G (1073741824 bytes)
disk size: 196K
cluster_size: 65536
backing file: ./snap2.qcow2 (actual path: ././snap2.qcow2)
Format specific information:
compat: 1.1
lazy refcounts: false
image: ././snap2.qcow2
file format: qcow2
virtual size: 1.0G (1073741824 bytes)
disk size: 196K
cluster_size: 65536
backing file: ./snap1.qcow2 (actual path: ./././snap1.qcow2)
Format specific information:
compat: 1.1
lazy refcounts: false
image: ./././snap1.qcow2
file format: qcow2
virtual size: 1.0G (1073741824 bytes)
disk size: 196K
cluster_size: 65536
backing file: ./base.qcow2 (actual path: ././././base.qcow2)
Format specific information:
compat: 1.1
lazy refcounts: false
image: ././././base.qcow2
file format: qcow2
virtual size: 1.0G (1073741824 bytes)
disk size: 196K
cluster_size: 65536
Format specific information:
compat: 1.1
lazy refcounts: false
If you want prepare the backing chain yourself, you should add "-o
backing_fmt=$farmat" options,
like "qemu-img create -f qcow2 base.s1 -b base.qcow2 -o backing_fmt=qcow2"
Thanks, it works after I did the above
thanx,
deepak