[libvirt-users] 回复： Fwd: About libvirt domain snapshot problem(for single disk snapshot)

[James Iter]

My negligence。

--  
James Iter


在 2018年3月22日 星期四，下午11:02，Dominik Psenner 写道：

> I believe that Your mail went to the wrong recipient. As far as I'm  
> concerned it should have been sent to the libvirt-users mailing list,  
> shouldn't it?
>  
>  
> On 2018-03-22 15:55, James Iter wrote:
> > Thank your reply.
> > I found the method.
> > Now, I sharing to you.
> > When create snapshot, just add ’no’ value to the ’snapshot’ option with —diskspec.
> > As below:
> >  
> > ``` bash
> > snapshot-create-as 8x0lbzvS --name sys_disk --disk-only --quiesce --atomic --diskspec "vda,snapshot=external" --diskspec "vdb,snapshot=no"
> > ```
> >  
> >  
> > --
> > James Iter
> >  
> >  
> > 在 2018年3月21日 星期三，下午6:24，Dominik Psenner 写道：
> >  
> > > (shameless plug)
> > >  
> > > To do automated daily backups of a few machines I wrote a small toolset to get the job done and make it as less a hassle as you can get. The source is on github https://github.com/dpsenner/libvirt-administration-tools/. Use it if you find it useful.
> > >  
> > > Note that I have yet not tested it with multiple disks but the tool uses the output of `virsh dombklst`. In theory that should snapshot all disks of a guest machine.
> > >  
> > > Cheers
> > > On Tue, 20 Mar 2018, 19:54 James Iter, <james.iter.cn at gmail.com (mailto:james.iter.cn at gmail.com)> wrote:
> > > >  
> > > > Hi, dear friends.
> > > > My guest has two disks, vda and vdb. both are qcow2 local file.
> > > > When guest running state.
> > > > I want to take the vda snapshot of guest(just vda, no include vdb). but I met libvirt do snapshot for all disks of guest.
> > > >  
> > > > About methods as follow:
> > > > 1、
> > > > ``` bash
> > > > virsh
> > > > snapshot-create-as 8x0lbzvS --name sys_disk3 --disk-only --diskspec "vda,snapshot=external"
> > > > ```
> > > > ``` result
> > > >  
> > > > [root at 10k03 ~]# ls -lh /opt/Images/*sys_disk3
> > > >  
> > > >  
> > > > -rw-------. 1 qemu qemu 194K 3月 20 23:27 /opt/Images/00d76a58-9637-4402-9739-21afd1246e06.sys_disk3
> > > >  
> > > >  
> > > > -rw-------. 1 qemu qemu 704K 3月 20 23:52 /opt/Images/8d582c1c-355a-4297-9434-2f2f562c77df.sys_disk3
> > > >  
> > > >  
> > > > ```
> > > >  
> > > > 2、
> > > > ``` python
> > > >  
> > > > #!/usr/bin/env python
> > > >  
> > > >  
> > > > # -*- coding: utf-8 -*-
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > > import libvirt
> > > >  
> > > >  
> > > > import libvirt_qemu
> > > >  
> > > >  
> > > > import json
> > > >  
> > > >  
> > > > import sys
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > > name = sys.argv[1]
> > > >  
> > > >  
> > > > print name
> > > >  
> > > >  
> > > > conn = libvirt.open()
> > > >  
> > > >  
> > > > dom = conn.lookupByName(name)
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > > xml = """
> > > >  
> > > >  
> > > > <domainsnapshot>
> > > >  
> > > >  
> > > > <name>sysdisk_by_xml</name>
> > > >  
> > > >  
> > > > <description>By xml</description>
> > > >  
> > > >  
> > > > <disks>
> > > >  
> > > >  
> > > > <disk name='vda' snapshot='external'>
> > > >  
> > > >  
> > > > </disk>
> > > >  
> > > >  
> > > > </disks>
> > > >  
> > > >  
> > > > </domainsnapshot>
> > > >  
> > > >  
> > > > """
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > > flags = 0
> > > >  
> > > >  
> > > > flags |= libvirt.VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY
> > > >  
> > > >  
> > > > flags |= libvirt.VIR_DOMAIN_SNAPSHOT_CREATE_QUIESCE
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > >  
> > > > ret = dom.snapshotCreateXML(xmlDesc=xml, flags=flags)
> > > >  
> > > >  
> > > > ```
> > > > ``` result
> > > >  
> > > > [root at 10k03 ~]# ls -lh /opt/Images/*sysdisk_by_xml
> > > >  
> > > >  
> > > > -rw-------. 1 qemu qemu 194K 3月 20 23:52 /opt/Images/00d76a58-9637-4402-9739-21afd1246e06.sysdisk_by_xml
> > > >  
> > > >  
> > > > -rw-------. 1 qemu qemu 1.2M 3月 21 00:03 /opt/Images/8d582c1c-355a-4297-9434-2f2f562c77df.sysdisk_by_xml
> > > >  
> > > >  
> > > > ```
> > > > 。
> > > >  
> > > >  
> > > > Then, I searched by google. see your page(https://www.redhat.com/archives/libvirt-users/2013-June/msg00102.html).
> > > >  
> > > > Now, I want to ask you, have you found the method?
> > > >  
> > > >  
> > > > --
> > > > James Iter
> > > >  
> > > >  
> > > > _______________________________________________
> > > > libvirt-users mailing list
> > > > libvirt-users at redhat.com (mailto:libvirt-users at redhat.com)
> > > > https://www.redhat.com/mailman/listinfo/libvirt-users
> > > >  
> > >  
> > >  
> >  
> >  
>  
>  
>  


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/libvirt-users/attachments/20180322/3e9dcb57/attachment.htm>