def unshelve_instance(self, context, instance):
sys_meta = instance.system_metadata
def safe_image_show(ctx, image_id):
if image_id:
return self.image_api.get(ctx, image_id, show_deleted=False)
else:
raise exception.ImageNotFound(image_id='')
if instance.vm_state == vm_states.SHELVED:
instance.task_state = task_states.POWERING_ON
instance.save(expected_task_state=task_states.UNSHELVING)
self.compute_rpcapi.start_instance(context, instance)
elif instance.vm_state == vm_states.SHELVED_OFFLOADED:
image = None
image_id = sys_meta.get('shelved_image_id')
# No need to check for image if image_id is None as
# "shelved_image_id" key is not set for volume backed
# instance during the shelve process
if image_id:
with compute_utils.EventReporter(context, 'get_image_info',
instance.uuid):
try:
image = safe_image_show(context, image_id)
except exception.ImageNotFound:
instance.vm_state = vm_states.ERROR
instance.save()
reason = _('Unshelve attempted but the image %s '
'cannot be found.') % image_id
LOG.error(reason, instance=instance)
raise exception.UnshelveException(
instance_id=instance.uuid, reason=reason)
try:
with compute_utils.EventReporter(context, 'schedule_instances',
instance.uuid):
filter_properties = {}
scheduler_utils.populate_retry(filter_properties,
instance.uuid)
hosts = self._schedule_instances(context, image,
filter_properties,
instance)
host_state = hosts[0]
scheduler_utils.populate_filter_properties(
filter_properties, host_state)
(host, node) = (host_state['host'], host_state['nodename'])
self.compute_rpcapi.unshelve_instance(
context,
instance,
host,
image=image,
filter_properties=filter_properties,
node=node)
except (exception.NoValidHost,
exception.UnsupportedPolicyException):
instance.task_state = None
instance.save()
LOG.warning(_LW("No valid host found for unshelve instance"),
instance=instance)
return
except Exception:
with excutils.save_and_reraise_exception():
instance.task_state = None
instance.save()
LOG.error(_LE("Unshelve attempted but an error "
"has occurred"),
instance=instance)
else:
LOG.error(_LE('Unshelve attempted but vm_state not SHELVED or '
'SHELVED_OFFLOADED'),
instance=instance)
instance.vm_state = vm_states.ERROR
instance.save()
return
def unshelve_instance(self, context, instance):
sys_meta = instance.system_metadata
def safe_image_show(ctx, image_id):
if image_id:
return self.image_api.get(ctx, image_id, show_deleted=False)
else:
raise exception.ImageNotFound(image_id='')
if instance.vm_state == vm_states.SHELVED:
instance.task_state = task_states.POWERING_ON
instance.save(expected_task_state=task_states.UNSHELVING)
self.compute_rpcapi.start_instance(context, instance)
snapshot_id = sys_meta.get('shelved_image_id')
if snapshot_id:
self._delete_image(context, snapshot_id)
elif instance.vm_state == vm_states.SHELVED_OFFLOADED:
image_id = sys_meta.get('shelved_image_id')
with compute_utils.EventReporter(context, 'get_image_info',
instance.uuid):
try:
image = safe_image_show(context, image_id)
except exception.ImageNotFound:
instance.vm_state = vm_states.ERROR
instance.save()
if image_id:
reason = _('Unshelve attempted but the image %s '
'cannot be found.') % image_id
else:
reason = _('Unshelve attempted but the image_id is '
'not provided')
LOG.error(reason, instance=instance)
raise exception.UnshelveException(
instance_id=instance.uuid, reason=reason)
try:
with compute_utils.EventReporter(context, 'schedule_instances',
instance.uuid):
filter_properties = {}
hosts = self._schedule_instances(context, image,
filter_properties,
instance)
host_state = hosts[0]
scheduler_utils.populate_filter_properties(
filter_properties, host_state)
(host, node) = (host_state['host'], host_state['nodename'])
self.compute_rpcapi.unshelve_instance(
context,
instance,
host,
image=image,
filter_properties=filter_properties,
node=node)
except exception.NoValidHost:
instance.task_state = None
instance.save()
LOG.warning(_LW("No valid host found for unshelve instance"),
instance=instance)
return
else:
LOG.error(_LE('Unshelve attempted but vm_state not SHELVED or '
'SHELVED_OFFLOADED'),
instance=instance)
instance.vm_state = vm_states.ERROR
instance.save()
return
for key in ['shelved_at', 'shelved_image_id', 'shelved_host']:
if key in sys_meta:
del (sys_meta[key])
instance.system_metadata = sys_meta
instance.save()
def unshelve_instance(self, context, instance, request_spec=None):
sys_meta = instance.system_metadata
def safe_image_show(ctx, image_id):
if image_id:
return self.image_api.get(ctx, image_id, show_deleted=False)
else:
raise exception.ImageNotFound(image_id='')
if instance.vm_state == vm_states.SHELVED:
instance.task_state = task_states.POWERING_ON
instance.save(expected_task_state=task_states.UNSHELVING)
self.compute_rpcapi.start_instance(context, instance)
elif instance.vm_state == vm_states.SHELVED_OFFLOADED:
image = None
image_id = sys_meta.get('shelved_image_id')
# No need to check for image if image_id is None as
# "shelved_image_id" key is not set for volume backed
# instance during the shelve process
if image_id:
with compute_utils.EventReporter(context, 'get_image_info',
instance.uuid):
try:
image = safe_image_show(context, image_id)
except exception.ImageNotFound:
instance.vm_state = vm_states.ERROR
instance.save()
reason = _('Unshelve attempted but the image %s '
'cannot be found.') % image_id
LOG.error(reason, instance=instance)
raise exception.UnshelveException(
instance_id=instance.uuid, reason=reason)
try:
with compute_utils.EventReporter(context, 'schedule_instances',
instance.uuid):
if not request_spec:
# NOTE(sbauza): We were unable to find an original
# RequestSpec object - probably because the instance is
# old. We need to mock that the old way
filter_properties = {}
request_spec = scheduler_utils.build_request_spec(
context, image, [instance])
else:
# NOTE(sbauza): Force_hosts/nodes needs to be reset
# if we want to make sure that the next destination
# is not forced to be the original host
request_spec.reset_forced_destinations()
# TODO(sbauza): Provide directly the RequestSpec object
# when _schedule_instances(),
# populate_filter_properties and populate_retry()
# accept it
filter_properties = request_spec.\
to_legacy_filter_properties_dict()
request_spec = request_spec.\
to_legacy_request_spec_dict()
scheduler_utils.populate_retry(filter_properties,
instance.uuid)
hosts = self._schedule_instances(context, request_spec,
filter_properties)
host_state = hosts[0]
scheduler_utils.populate_filter_properties(
filter_properties, host_state)
(host, node) = (host_state['host'], host_state['nodename'])
self.compute_rpcapi.unshelve_instance(
context,
instance,
host,
image=image,
filter_properties=filter_properties,
node=node)
except (exception.NoValidHost,
exception.UnsupportedPolicyException):
instance.task_state = None
instance.save()
LOG.warning(_LW("No valid host found for unshelve instance"),
instance=instance)
return
except Exception:
with excutils.save_and_reraise_exception():
instance.task_state = None
instance.save()
LOG.error(_LE("Unshelve attempted but an error "
"has occurred"),
instance=instance)
else:
LOG.error(_LE('Unshelve attempted but vm_state not SHELVED or '
'SHELVED_OFFLOADED'),
instance=instance)
instance.vm_state = vm_states.ERROR
instance.save()
return
