[libvirt-users] virsh create snapshot not honoring diskspec?

Silver Sky Soft Services, Inc. contactus at silverskysoft.com
Thu Aug 13 20:03:58 UTC 2015


Checking in if anyone has thoughts on this?
Thanks,
KiranK

On Fri, Aug 7, 2015 at 8:53 AM, Silver Sky Soft Services, Inc. <
contactus at silverskysoft.com> wrote:

> Hi,
> I'm trying to create a snapshot on a specific disk by using diskspec
> option. However, libvirt/virsh seems to ignore it and takes a snapshot of
> all disks. Am I using this option incorrectly?
>
> In below examples, I'm trying to snapshot only vdb. However even vda is
> getting snapshotted regardless of diskspec. Is this a known issue?
>
> I'm on CentOS 7.1, libvirtd (libvirt) 1.2.8, virsh 1.2.8
>
> [root at localhost scripts]# virsh domblklist centos_nfs
> Target     Source
> ------------------------------------------------
> vda        /var/lib/libvirt/images/centos_nfs.SNAP_2015-08-07-081800
> vdb
>  /var/lib/libvirt/images/centos_nfs_storage.SNAP_2015-08-07-081800
> hdc        -
>
> [root at localhost scripts]# virsh snapshot-create-as --domain centos_nfs
> --name SNAP_2015-08-07-090909 --no-metadata --disk-only --atomic --diskspec
> vdb,snapshot=external
> Domain snapshot SNAP_2015-08-07-090909 created
>
> [root at localhost scripts]# virsh domblklist centos_nfs
> Target     Source
> ------------------------------------------------
> vda        /var/lib/libvirt/images/centos_nfs.SNAP_2015-08-07-090909
> vdb
>  /var/lib/libvirt/images/centos_nfs_storage.SNAP_2015-08-07-090909
> hdc        -
>
>
> [root at localhost scripts]# virsh snapshot-create-as --domain centos_nfs
> --name SNAP_2015-08-07-101010 --no-metadata --disk-only --atomic --diskspec
> vdb,snapshot=external,file=/var/lib/libvirt/images/centos_nfs_storage.SNAP_2015-08-07-101010
> Domain snapshot SNAP_2015-08-07-101010 created
>
> [root at localhost scripts]# virsh domblklist centos_nfs
> Target     Source
> ------------------------------------------------
> vda        /var/lib/libvirt/images/centos_nfs.SNAP_2015-08-07-101010
> vdb
>  /var/lib/libvirt/images/centos_nfs_storage.SNAP_2015-08-07-101010
> hdc        -
>
> Thanks,
> KiranK
>
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