On Thu, Aug 13, 2015 at 1:16 PM, Eric Blake <eblake@redhat.com> wrote:
On 08/07/2015 09:53 AM, Silver Sky Soft Services, Inc. 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@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@localhost scripts]# virsh snapshot-create-as --domain centos_nfs --name SNAP_2015-08-07-090909 --no-metadata --disk-only --atomic --diskspec vdb,snapshot=external
This command line did not give a diskspec for vda, so the action for vda defaults to whatever the <domain> XML says is default for that disk .
Try giving: --diskspec vdb,snapshot=external --diskspec vda,snapshot=none to explicitly override the <domain> defaults for both disks at once.
Thanks Eric. That helped. Although minor note was the option was "snapshot=no" instead of "snapshot=none". Just to put in these archives, the working command: virsh snapshot-create-as --domain cento_os --name snap3 --no-metadata --disk-only --atomic --diskspec vdb,snapshot=no --diskspec vda,snapshot=external -KiranK