[libvirt-users] How to list and change domain's disk image file

[Ricardo Hillbrecht]

Thank you for your fast answer, and the new API will be welcome when it comes.

Regards

Ricardo

2012/6/11, Eric Blake <eblake at redhat.com>:
> On 06/11/2012 08:20 PM, Ricardo Hillbrecht wrote:
>> Hi
>>
>> I'm writing a C program using libvirt API and need to list the storage
>> volumes used by each domain. I'm wondering if there is a way to do
>> this better of searching the XML strings of all domains, does anyone
>> can suggest me something ?
>
> Parsing the XML is the current method of doing this.  I have plans of
> someday adding a new API that returns a list of virStorageVolPtr
> corresponding to a given domain, but that's still a ways down the road.
>
>>
>> I also need to create a function to change the img file of a given
>> domain. I intend to do the following:
>>
>> 1. virDomainGetXMLDesc (domain)
>> 2. change the XML to other img file
>> 3. virDomainUndefine (domain)
>
> You can skip this step (it is okay to redefine an existing domain).
>
>> 4. virDomainCreateXML (changed XML)
>>
>> Am i correct doing this ? There is a better method ?
>
> You are doing it correctly for affecting the next boot; and this is how
> programs like virt-manager do it.  If you want the changes to take place
> while the domain is live, then you will have to use the hotplug APIs
> such as virDomainDeviceModify.
>
> --
> Eric Blake   eblake at redhat.com    +1-919-301-3266
> Libvirt virtualization library http://libvirt.org
>
>