def destroy_vdi(cls, session, vdi_ref):
try:
task = session.call_xenapi('Async.VDI.destroy', vdi_ref)
session.wait_for_task(task)
except cls.XenAPI.Failure, exc:
LOG.exception(exc)
raise StorageError(_('Unable to destroy VDI %s') % vdi_ref)
def _wait_for_device(dev):
"""Wait for device node to appear"""
for i in xrange(0, FLAGS.block_device_creation_timeout):
if os.path.exists('/dev/%s' % dev):
return
time.sleep(1)
raise StorageError(_('Timeout waiting for device %s to be created') % dev)
def destroy_vbd(cls, session, vbd_ref):
"""Destroy VBD from host database"""
try:
task = session.call_xenapi('Async.VBD.destroy', vbd_ref)
session.wait_for_task(task)
except cls.XenAPI.Failure, exc:
LOG.exception(exc)
raise StorageError(_('Unable to destroy VBD %s') % vbd_ref)
def unplug_vbd(cls, session, vbd_ref):
"""Unplug VBD from VM"""
try:
vbd_ref = session.call_xenapi('VBD.unplug', vbd_ref)
except cls.XenAPI.Failure, exc:
LOG.exception(exc)
if exc.details[0] != 'DEVICE_ALREADY_DETACHED':
raise StorageError(_('Unable to unplug VBD %s') % vbd_ref)
def create_volume_for_sm(self, volume, sr_uuid):
LOG.debug("Creating volume for Storage Manager")
sm_vol_rec = {}
try:
sr_ref = self._session.call_xenapi("SR.get_by_uuid", sr_uuid)
except self.XenAPI.Failure, exc:
LOG.exception(exc)
raise StorageError(_('Unable to get SR using uuid'))
def delete_volume_for_sm(self, vdi_uuid):
vdi_ref = self._session.call_xenapi("VDI.get_by_uuid", vdi_uuid)
if vdi_ref is None:
raise exception.Error(_('Could not find VDI ref'))
try:
self._session.call_xenapi("VDI.destroy", vdi_ref)
except self.XenAPI.Failure, exc:
LOG.exception(exc)
raise StorageError(_('Error destroying VDI'))
def attach_volume(self, connection_info, instance_name, mountpoint):
"""Attach volume storage to VM instance"""
# Before we start, check that the VM exists
vm_ref = VMHelper.lookup(self._session, instance_name)
if vm_ref is None:
raise exception.InstanceNotFound(instance_id=instance_name)
# NOTE: No Resource Pool concept so far
LOG.debug(
_("Attach_volume: %(connection_info)s, %(instance_name)s,"
" %(mountpoint)s") % locals())
driver_type = connection_info['driver_volume_type']
if driver_type not in ['iscsi', 'xensm']:
raise exception.VolumeDriverNotFound(driver_type=driver_type)
data = connection_info['data']
if 'name_label' not in data:
label = 'tempSR-%s' % data['volume_id']
else:
label = data['name_label']
del data['name_label']
if 'name_description' not in data:
desc = 'Disk-for:%s' % instance_name
else:
desc = data['name_description']
LOG.debug(connection_info)
sr_params = {}
if u'sr_uuid' not in data:
sr_params = VolumeHelper.parse_volume_info(connection_info,
mountpoint)
uuid = "FA15E-D15C-" + str(sr_params['id'])
sr_params['sr_type'] = 'iscsi'
else:
uuid = data['sr_uuid']
for k in data['introduce_sr_keys']:
sr_params[k] = data[k]
sr_params['name_description'] = desc
# Introduce SR
try:
sr_ref = self.introduce_sr(uuid, label, sr_params)
LOG.debug(_('Introduced %(label)s as %(sr_ref)s.') % locals())
except self.XenAPI.Failure, exc:
LOG.exception(exc)
raise StorageError(_('Unable to introduce Storage Repository'))
class VMHelper(HelperBase):
"""
The class that wraps the helper methods together.
"""
@classmethod
def create_vm(cls, session, instance, kernel, ramdisk,
use_pv_kernel=False):
"""Create a VM record. Returns a Deferred that gives the new
VM reference.
the use_pv_kernel flag indicates whether the guest is HVM or PV
There are 3 scenarios:
1. Using paravirtualization, kernel passed in
2. Using paravirtualization, kernel within the image
3. Using hardware virtualization
"""
inst_type_id = instance.instance_type_id
instance_type = instance_types.get_instance_type(inst_type_id)
mem = str(long(instance_type['memory_mb']) * 1024 * 1024)
vcpus = str(instance_type['vcpus'])
rec = {
'actions_after_crash': 'destroy',
'actions_after_reboot': 'restart',
'actions_after_shutdown': 'destroy',
'affinity': '',
'blocked_operations': {},
'ha_always_run': False,
'ha_restart_priority': '',
'HVM_boot_params': {},
'HVM_boot_policy': '',
'is_a_template': False,
'memory_dynamic_min': mem,
'memory_dynamic_max': mem,
'memory_static_min': '0',
'memory_static_max': mem,
'memory_target': mem,
'name_description': '',
'name_label': instance.name,
'other_config': {'allowvssprovider': False},
'other_config': {},
'PCI_bus': '',
'platform': {'acpi': 'true', 'apic': 'true', 'pae': 'true',
'viridian': 'true', 'timeoffset': '0'},
'PV_args': '',
'PV_bootloader': '',
'PV_bootloader_args': '',
'PV_kernel': '',
'PV_legacy_args': '',
'PV_ramdisk': '',
'recommendations': '',
'tags': [],
'user_version': '0',
'VCPUs_at_startup': vcpus,
'VCPUs_max': vcpus,
'VCPUs_params': {},
'xenstore_data': {}}
# Complete VM configuration record according to the image type
# non-raw/raw with PV kernel/raw in HVM mode
if use_pv_kernel:
rec['platform']['nx'] = 'false'
if instance.kernel_id:
# 1. Kernel explicitly passed in, use that
rec['PV_args'] = 'root=/dev/xvda1'
rec['PV_kernel'] = kernel
rec['PV_ramdisk'] = ramdisk
else:
# 2. Use kernel within the image
rec['PV_bootloader'] = 'pygrub'
else:
# 3. Using hardware virtualization
rec['platform']['nx'] = 'true'
rec['HVM_boot_params'] = {'order': 'dc'}
rec['HVM_boot_policy'] = 'BIOS order'
LOG.debug(_('Created VM %s...'), instance.name)
vm_ref = session.call_xenapi('VM.create', rec)
instance_name = instance.name
LOG.debug(_('Created VM %(instance_name)s as %(vm_ref)s.') % locals())
return vm_ref
@classmethod
def ensure_free_mem(cls, session, instance):
inst_type_id = instance.instance_type_id
instance_type = instance_types.get_instance_type(inst_type_id)
mem = long(instance_type['memory_mb']) * 1024 * 1024
#get free memory from host
host = session.get_xenapi_host()
host_free_mem = long(session.get_xenapi().host.
compute_free_memory(host))
return host_free_mem >= mem
@classmethod
def create_vbd(cls, session, vm_ref, vdi_ref, userdevice, bootable):
"""Create a VBD record. Returns a Deferred that gives the new
VBD reference."""
vbd_rec = {}
vbd_rec['VM'] = vm_ref
vbd_rec['VDI'] = vdi_ref
vbd_rec['userdevice'] = str(userdevice)
vbd_rec['bootable'] = bootable
vbd_rec['mode'] = 'RW'
vbd_rec['type'] = 'disk'
vbd_rec['unpluggable'] = True
vbd_rec['empty'] = False
vbd_rec['other_config'] = {}
vbd_rec['qos_algorithm_type'] = ''
vbd_rec['qos_algorithm_params'] = {}
vbd_rec['qos_supported_algorithms'] = []
LOG.debug(_('Creating VBD for VM %(vm_ref)s,'
' VDI %(vdi_ref)s ... ') % locals())
vbd_ref = session.call_xenapi('VBD.create', vbd_rec)
LOG.debug(_('Created VBD %(vbd_ref)s for VM %(vm_ref)s,'
' VDI %(vdi_ref)s.') % locals())
return vbd_ref
@classmethod
def find_vbd_by_number(cls, session, vm_ref, number):
"""Get the VBD reference from the device number"""
vbd_refs = session.get_xenapi().VM.get_VBDs(vm_ref)
if vbd_refs:
for vbd_ref in vbd_refs:
try:
vbd_rec = session.get_xenapi().VBD.get_record(vbd_ref)
if vbd_rec['userdevice'] == str(number):
return vbd_ref
except cls.XenAPI.Failure, exc:
LOG.exception(exc)
raise StorageError(_('VBD not found in instance %s') % vm_ref)