Re: creation of storage volume fails

[Alex Jia <ajia@xxxxxxxxxx>]

On 05/08/2012 09:58 AM, John Wayne wrote:

hi,

i am getting this error below when i try to create a storage volume:

    libvirt.virStoragePool.CreateXML(storagepoolobject,xmldesc,0)

AttributeError: class virStoragePool has no attribute 'CreateXML'

Please see the above error message carefully, you're calling a error function name, it should be
'createXML' not 'CreateXML':

>>> dir(libvirt.virStoragePool)
['UUID', 'UUIDString', 'XMLDesc', '__del__', '__doc__', '__init__', '__module__', 'autostart', 'build', 'connect', 'create', 'createXML', 'createXMLFrom', 'delete', 'destroy', 'info', 'isActive', 'isPersistent', 'listVolumes', 'name', 'numOfVolumes', 'refresh', 'setAutostart', 'storageVolLookupByName', 'undefine']

my code is:

xmldesc="xml description of storage volume which i got from sudo virsh vol-dumpxml"

#get a storage pool object to use in creating a volume

storagepoolobject=libvirt.virConnect.storagePoolLookupByName(conn,'poolname')

#now try to create the volume using the above storage pool object

libvirt.virStoragePool.CreateXML(storagepoolobject,xmldesc,0)

from python:

-bash-4.1$ python

>>> import libvirt

>>> dir(libvirt.virStoragePool)

['UUID', 'UUIDString', 'XMLDesc', '__del__', '__doc__', '__init__', '__module__', 'autostart', 'build', 'connect', 'create', 'createXML', 'createXMLFrom', 'delete', 'destroy', 'info', 'isActive', 'isPersistent', 'listVolumes', 'name', 'numOfVolumes', 'refresh', 'setAutostart', 'storageVolLookupByName', 'undefine']

>>> help(libvirt.virStoragePool.createXML)

Help on method createXML in module libvirt:

createXML(self, xmldesc, flags) unbound libvirt.virStoragePool method

    Create a storage volume within a pool based

    on an XML description. Not all pools support

    creation of volumes

from the libvirt.org documentation:

http://libvirt.org/html/libvirt-libvirt.html#virStorageVolCreateXML

virStorageVolPtr virStorageVolCreateXML (virStoragePoolPtr pool, 

const char * xmldesc, 

unsigned int flags)

Create a storage volume within a pool based on an XML description. Not all pools support creation of volumes

pool: pointer to storage pool

xmldesc: description of volume to create

flags: extra flags; not used yet, so callers should always pass 0

Returns: the storage volume, or NULL on error

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