[libvirt] Is there an API for clone?

[ajia]

On 11/12/2010 02:07 AM, 黄亮 wrote:
> Hi Alex
> Thank you for your reply.
> I just wanna make sure I'm not misunderstanding, 
> virStorageVolGetXMLDesc & virStorageVolCreateXMLFrom together can do 
> the clone process, am I right?
In fact, libvirt will call a group of APIs to complete vol-clone 
operation, you can track the whole calling process, it  looks like this:
                                               virsh vol-clone <vol-key> 
<newname>
                                                                            |
                                                                           V
                                                              
virConnectOpenAuth
                                                                            |
                                                                           V
                                                         
virStorageVolLookupByKey
                                                                            |
                                                                           V
                                                        
virStoragePoolLookupByVolume  ('default' is default pool)
                                                                            |
                                                                           V
                                                        
virStorageVolGetXMLDesc
                                                                            |
                                                                           V
                                                      
virStorageVolCreateXMLFrom
                                                                            |
                                                                           V
                                                            
virStorageVolGetName (twice)
                                                                         
    |
                                                                           V
                                                               
virStorageVolFree    (twice)
                                                                         
    |
                                                                           V
                                                              
virStoragePoolFree
                                                                            |
                                                                           V
                                                                
virConnectClose


   Alex
> Regards
> 2010-11-12
> ------------------------------------------------------------------------
> Lancer
> ------------------------------------------------------------------------
> *发件人：* Alex Jia
> *发送时间：* 2010-11-10  13:28:21
> *收件人：* 黄亮
> *抄送：* libvir-list
> *主题：* Re: [libvirt] Is there an API for clone?
> Hi lancer,
> As Osier said, libvirt hasn't a independent API for cloning an
> existing guest, instead of using virStorageVolGetXMLDesc API to
> get a guest volume xml description and then calling
> virStorageVolCreateXMLFrom API to clone a new volume.
> For python-virtinst component, you may use virt-clone to implement
> this, for libvirt component, you may directly use python binding
> API or virsh tool 'vol-clone' to implement it.
> I hope it's helpful for you.
> - Alex
> ----- Original Message -----
> From: "黄亮" <lancerhuang at 163.com>
> To: "libvir-list" <libvir-list at redhat.com>
> Sent: Wednesday, November 10, 2010 9:30:28 AM GMT +08:00 Beijing / Chongqing / Hong Kong / Urumqi
> Subject: [libvirt] Is there an API for clone?
> Hi, guys
> I know there is a command "virt-clone", but I couldn't find the equivalent API here : http://libvirt.org/html/libvirt-libvirt.html 
>
> So, is there an API to clone an existing VM or not?
> Thank you!
> Regards
> 2010-11-10
> Lancer
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