def __init__(self, **kargs):
self.conn = kargs['conn']
self.objstore = kargs['objstore']
self.task = TaskModel(**kargs)
self.vmstorages = VMStoragesModel(**kargs)
self.vmstorage = VMStorageModel(**kargs)
def __init__(self, **kargs):
self.conn = kargs['conn']
self.objstore = kargs['objstore']
self.task = TaskModel(**kargs)
self.vmstorages = VMStoragesModel(**kargs)
self.vmstorage = VMStorageModel(**kargs)
class VMSnapshotsModel(object):
def __init__(self, **kargs):
self.conn = kargs['conn']
self.objstore = kargs['objstore']
self.task = TaskModel(**kargs)
self.vmstorages = VMStoragesModel(**kargs)
self.vmstorage = VMStorageModel(**kargs)
def create(self, vm_name, params={}):
"""Create a snapshot with the current domain state.
The VM must be stopped and contain only disks with format 'qcow2';
otherwise an exception will be raised.
Parameters:
vm_name -- the name of the VM where the snapshot will be created.
params -- a dict with the following values:
"name": The snapshot name (optional). If omitted, a default value
based on the current time will be used.
Return:
A Task running the operation.
"""
vir_dom = VMModel.get_vm(vm_name, self.conn)
if DOM_STATE_MAP[vir_dom.info()[0]] != u'shutoff':
raise InvalidOperation('KCHSNAP0001E', {'vm': vm_name})
# if the VM has a non-CDROM disk with type 'raw', abort.
for storage_name in self.vmstorages.get_list(vm_name):
storage = self.vmstorage.lookup(vm_name, storage_name)
type = storage['type']
format = storage['format']
if type != u'cdrom' and format != u'qcow2':
raise InvalidOperation('KCHSNAP0010E', {'vm': vm_name,
'format': format})
name = params.get('name', unicode(int(time.time())))
task_params = {'vm_name': vm_name, 'name': name}
taskid = add_task(u'/plugins/kimchi/vms/%s/snapshots/%s' % (vm_name,
name), self._create_task, self.objstore, task_params)
return self.task.lookup(taskid)
def _create_task(self, cb, params):
"""Asynchronous function which actually creates the snapshot.
Parameters:
cb -- a callback function to signal the Task's progress.
params -- a dict with the following values:
"vm_name": the name of the VM where the snapshot will be created.
"name": the snapshot name.
"""
vm_name = params['vm_name']
name = params['name']
cb('building snapshot XML')
root_elem = E.domainsnapshot()
root_elem.append(E.name(name))
xml = ET.tostring(root_elem, encoding='utf-8')
try:
cb('fetching snapshot domain')
vir_dom = VMModel.get_vm(vm_name, self.conn)
cb('creating snapshot')
vir_dom.snapshotCreateXML(xml, 0)
except (NotFoundError, OperationFailed, libvirt.libvirtError), e:
raise OperationFailed('KCHSNAP0002E',
{'name': name, 'vm': vm_name,
'err': e.message})
cb('OK', True)
class VMSnapshotsModel(object):
def __init__(self, **kargs):
self.conn = kargs['conn']
self.objstore = kargs['objstore']
self.task = TaskModel(**kargs)
self.vmstorages = VMStoragesModel(**kargs)
self.vmstorage = VMStorageModel(**kargs)
def create(self, vm_name, params={}):
"""Create a snapshot with the current domain state.
The VM must be stopped and contain only disks with format 'qcow2';
otherwise an exception will be raised.
Parameters:
vm_name -- the name of the VM where the snapshot will be created.
params -- a dict with the following values:
"name": The snapshot name (optional). If omitted, a default value
based on the current time will be used.
Return:
A Task running the operation.
"""
vir_dom = VMModel.get_vm(vm_name, self.conn)
if DOM_STATE_MAP[vir_dom.info()[0]] != u'shutoff':
raise InvalidOperation('KCHSNAP0001E', {'vm': vm_name})
# if the VM has a non-CDROM disk with type 'raw', abort.
for storage_name in self.vmstorages.get_list(vm_name):
storage = self.vmstorage.lookup(vm_name, storage_name)
type = storage['type']
format = storage['format']
if type != u'cdrom' and format != u'qcow2':
raise InvalidOperation('KCHSNAP0010E', {
'vm': vm_name,
'format': format
})
name = params.get('name', unicode(int(time.time())))
task_params = {'vm_name': vm_name, 'name': name}
taskid = add_task(
u'/plugins/kimchi/vms/%s/snapshots/%s' % (vm_name, name),
self._create_task, self.objstore, task_params)
return self.task.lookup(taskid)
def _create_task(self, cb, params):
"""Asynchronous function which actually creates the snapshot.
Parameters:
cb -- a callback function to signal the Task's progress.
params -- a dict with the following values:
"vm_name": the name of the VM where the snapshot will be created.
"name": the snapshot name.
"""
vm_name = params['vm_name']
name = params['name']
cb('building snapshot XML')
root_elem = E.domainsnapshot()
root_elem.append(E.name(name))
xml = ET.tostring(root_elem, encoding='utf-8')
try:
cb('fetching snapshot domain')
vir_dom = VMModel.get_vm(vm_name, self.conn)
cb('creating snapshot')
vir_dom.snapshotCreateXML(xml, 0)
except (NotFoundError, OperationFailed, libvirt.libvirtError), e:
raise OperationFailed('KCHSNAP0002E', {
'name': name,
'vm': vm_name,
'err': e.message
})
cb('OK', True)
