def get_connection(read_only=False):
"""
Returns an object representing the connection to a virtualization
platform.
This could be :mod:`nova.virt.fake.FakeConnection` in test mode,
a connection to KVM, QEMU, or UML via :mod:`libvirt_conn`, or a connection
to XenServer or Xen Cloud Platform via :mod:`xenapi`.
Any object returned here must conform to the interface documented by
:mod:`FakeConnection`.
**Related flags**
:connection_type: A string literal that falls through a if/elif structure
to determine what virtualization mechanism to use.
Values may be
* fake
* libvirt
* xenapi
"""
# TODO(termie): maybe lazy load after initial check for permissions
# TODO(termie): check whether we can be disconnected
t = FLAGS.connection_type
if t == 'fake':
conn = fake.get_connection(read_only)
elif t == 'libvirt':
conn = libvirt_conn.get_connection(read_only)
elif t == 'xenapi':
conn = xenapi_conn.get_connection(read_only)
elif t == 'hyperv':
conn = hyperv.get_connection(read_only)
elif t == 'vmwareapi':
conn = vmwareapi_conn.get_connection(read_only)
elif t == 'openvz':
conn = openvz_conn.get_connection(read_only)
else:
raise Exception('Unknown connection type "%s"' % t)
if conn is None:
LOG.error(_('Failed to open connection to the hypervisor'))
sys.exit(1)
return utils.check_isinstance(conn, driver.ComputeDriver)
def get_connection(read_only=False):
"""
Returns an object representing the connection to a virtualization
platform.
This could be :mod:`nova.virt.fake.FakeConnection` in test mode,
a connection to KVM, QEMU, or UML via :mod:`libvirt_conn`, or a connection
to XenServer or Xen Cloud Platform via :mod:`xenapi`.
Any object returned here must conform to the interface documented by
:mod:`FakeConnection`.
**Related flags**
:connection_type: A string literal that falls through a if/elif structure
to determine what virtualization mechanism to use.
Values may be
* fake
* libvirt
* xenapi
"""
# TODO(termie): maybe lazy load after initial check for permissions
# TODO(termie): check whether we can be disconnected
t = FLAGS.connection_type
if t == 'fake':
conn = fake.get_connection(read_only)
elif t == 'libvirt':
conn = libvirt_conn.get_connection(read_only)
elif t == 'xenapi':
conn = xenapi_conn.get_connection(read_only)
elif t == 'hyperv':
conn = hyperv.get_connection(read_only)
elif t == 'vmwareapi':
conn = vmwareapi_conn.get_connection(read_only)
elif t == 'openvz':
conn = openvz_conn.get_connection(read_only)
else:
raise Exception('Unknown connection type "%s"' % t)
if conn is None:
LOG.error(_('Failed to open connection to the hypervisor'))
sys.exit(1)
return utils.check_isinstance(conn, driver.ComputeDriver)
def test_create_destroy(self):
"""Create a VM and destroy it"""
instance = {'internal_id': random.randint(1, 1000000),
'memory_mb': '1024',
'mac_address': '02:12:34:46:56:67',
'vcpus': 2,
'project_id': 'fake',
'instance_type': 'm1.small'}
instance_ref = db.instance_create(self.context, instance)
conn = hyperv.get_connection(False)
conn._create_vm(instance_ref) # pylint: disable=W0212
found = [n for n in conn.list_instances()
if n == instance_ref['name']]
self.assertTrue(len(found) == 1)
info = conn.get_info(instance_ref['name'])
#Unfortunately since the vm is not running at this point,
#we cannot obtain memory information from get_info
self.assertEquals(info['num_cpu'], instance_ref['vcpus'])
conn.destroy(instance_ref)
found = [n for n in conn.list_instances()
if n == instance_ref['name']]
self.assertTrue(len(found) == 0)
def test_create_destroy(self):
"""Create a VM and destroy it"""
instance = {
'internal_id': random.randint(1, 1000000),
'memory_mb': '1024',
'mac_address': '02:12:34:46:56:67',
'vcpus': 2,
'project_id': 'fake',
'instance_type': 'm1.small'
}
instance_ref = db.instance_create(self.context, instance)
conn = hyperv.get_connection(False)
conn._create_vm(instance_ref) # pylint: disable=W0212
found = [n for n in conn.list_instances() if n == instance_ref['name']]
self.assertTrue(len(found) == 1)
info = conn.get_info(instance_ref['name'])
#Unfortunately since the vm is not running at this point,
#we cannot obtain memory information from get_info
self.assertEquals(info['num_cpu'], instance_ref['vcpus'])
conn.destroy(instance_ref)
found = [n for n in conn.list_instances() if n == instance_ref['name']]
self.assertTrue(len(found) == 0)
