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

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(a)redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org