def do_attach():
# check the volume status before attaching
volume = self.db.volume_get(context, volume_id)
if volume['status'] == 'attaching':
if (volume['instance_uuid']
and volume['instance_uuid'] != instance_uuid):
msg = _("being attached by another instance")
raise exception.InvalidVolume(reason=msg)
elif volume['status'] != "available":
msg = _("status must be available")
raise exception.InvalidVolume(reason=msg)
self.db.volume_update(context, volume_id, {
"instance_uuid": instance_uuid,
"status": "attaching"
})
# TODO(vish): refactor this into a more general "reserve"
# TODO(sleepsonthefloor): Is this 'elevated' appropriate?
if not uuidutils.is_uuid_like(instance_uuid):
raise exception.InvalidUUID(uuid=instance_uuid)
try:
self.driver.attach_volume(context, volume_id, instance_uuid,
mountpoint)
except Exception:
with excutils.save_and_reraise_exception():
self.db.volume_update(context, volume_id,
{'status': 'error_attaching'})
self.db.volume_attached(context.elevated(), volume_id,
instance_uuid, mountpoint)
def host_passes(self, host_state, filter_properties):
context = filter_properties['context']
host = volume_utils.extract_host(host_state.host, 'host')
scheduler_hints = filter_properties.get('scheduler_hints') or {}
instance_uuid = scheduler_hints.get(HINT_KEYWORD, None)
# Without 'local_to_instance' hint
if not instance_uuid:
return True
if not uuidutils.is_uuid_like(instance_uuid):
raise exception.InvalidUUID(uuid=instance_uuid)
# TODO(adrienverge): Currently it is not recommended to allow instance
# migrations for hypervisors where this hint will be used. In case of
# instance migration, a previously locally-created volume will not be
# automatically migrated. Also in case of instance migration during the
# volume's scheduling, the result is unpredictable. A future
# enhancement would be to subscribe to Nova migration events (e.g. via
# Ceilometer).
# First, lookup for already-known information in local cache
if instance_uuid in self._cache:
return self._cache[instance_uuid] == host
if not self._nova_has_extended_server_attributes(context):
LOG.warning(
_LW('Hint "%s" dropped because '
'ExtendedServerAttributes not active in Nova.'),
HINT_KEYWORD)
raise exception.CinderException(
_('Hint "%s" not supported.') % HINT_KEYWORD)
server = nova.API().get_server(context,
instance_uuid,
privileged_user=True,
timeout=REQUESTS_TIMEOUT)
if not hasattr(server, INSTANCE_HOST_PROP):
LOG.warning(
_LW('Hint "%s" dropped because Nova did not return '
'enough information. Either Nova policy needs to '
'be changed or a privileged account for Nova '
'should be specified in conf.'), HINT_KEYWORD)
raise exception.CinderException(
_('Hint "%s" not supported.') % HINT_KEYWORD)
self._cache[instance_uuid] = getattr(server, INSTANCE_HOST_PROP)
# Match if given instance is hosted on host
return self._cache[instance_uuid] == host
def do_attach():
# check the volume status before attaching
volume = self.db.volume_get(context, volume_id)
if volume['status'] == 'attaching':
if (volume['instance_uuid']
and volume['instance_uuid'] != instance_uuid):
msg = _("being attached by another instance")
raise exception.InvalidVolume(reason=msg)
if (volume['attached_host']
and volume['attached_host'] != host_name):
msg = _("being attached by another host")
raise exception.InvalidVolume(reason=msg)
elif volume['status'] != "available":
msg = _("status must be available")
raise exception.InvalidVolume(reason=msg)
# TODO(jdg): attach_time column is currently varchar
# we should update this to a date-time object
# also consider adding detach_time?
now = timeutils.strtime()
self.db.volume_update(
context, volume_id, {
"instance_uuid": instance_uuid,
"attached_host": host_name,
"status": "attaching",
"attach_time": now
})
if instance_uuid and not uuidutils.is_uuid_like(instance_uuid):
self.db.volume_update(context, volume_id,
{'status': 'error_attaching'})
raise exception.InvalidUUID(uuid=instance_uuid)
host_name_sanitized = utils.sanitize_hostname(
host_name) if host_name else None
volume = self.db.volume_get(context, volume_id)
try:
self.driver.attach_volume(context, volume, instance_uuid,
host_name_sanitized, mountpoint)
except Exception:
with excutils.save_and_reraise_exception():
self.db.volume_update(context, volume_id,
{'status': 'error_attaching'})
self.db.volume_attached(context.elevated(), volume_id,
instance_uuid, host_name_sanitized,
mountpoint)
def attach_volume(self, context, volume_id, instance_uuid, mountpoint):
"""Updates db to show volume is attached"""
# TODO(vish): refactor this into a more general "reserve"
# TODO(sleepsonthefloor): Is this 'elevated' appropriate?
if not utils.is_uuid_like(instance_uuid):
raise exception.InvalidUUID(instance_uuid)
try:
self.driver.attach_volume(context,
volume_id,
instance_uuid,
mountpoint)
except Exception:
with excutils.save_and_reraise_exception():
self.db.volume_update(context,
volume_id,
{'status': 'error_attaching'})
self.db.volume_attached(context.elevated(),
volume_id,
instance_uuid,
mountpoint)
def do_attach():
# check the volume status before attaching
volume = self.db.volume_get(context, volume_id)
volume_metadata = self.db.volume_admin_metadata_get(
context.elevated(), volume_id)
if volume['status'] == 'attaching':
if (volume['instance_uuid']
and volume['instance_uuid'] != instance_uuid):
msg = _("being attached by another instance")
raise exception.InvalidVolume(reason=msg)
if (volume['attached_host']
and volume['attached_host'] != host_name):
msg = _("being attached by another host")
raise exception.InvalidVolume(reason=msg)
if (volume_metadata.get('attached_mode')
and volume_metadata.get('attached_mode') != mode):
msg = _("being attached by different mode")
raise exception.InvalidVolume(reason=msg)
elif volume['status'] != "available":
msg = _("status must be available")
raise exception.InvalidVolume(reason=msg)
# TODO(jdg): attach_time column is currently varchar
# we should update this to a date-time object
# also consider adding detach_time?
self._notify_about_volume_usage(context, volume, "attach.start")
self.db.volume_update(
context, volume_id, {
"instance_uuid": instance_uuid,
"attached_host": host_name,
"status": "attaching",
"attach_time": timeutils.strtime()
})
self.db.volume_admin_metadata_update(context.elevated(), volume_id,
{"attached_mode": mode},
False)
if instance_uuid and not uuidutils.is_uuid_like(instance_uuid):
self.db.volume_update(context, volume_id,
{'status': 'error_attaching'})
raise exception.InvalidUUID(uuid=instance_uuid)
host_name_sanitized = utils.sanitize_hostname(
host_name) if host_name else None
volume = self.db.volume_get(context, volume_id)
if volume_metadata.get('readonly') == 'True' and mode != 'ro':
self.db.volume_update(context, volume_id,
{'status': 'error_attaching'})
raise exception.InvalidVolumeAttachMode(mode=mode,
volume_id=volume_id)
try:
self.driver.attach_volume(context, volume, instance_uuid,
host_name_sanitized, mountpoint)
except Exception:
with excutils.save_and_reraise_exception():
self.db.volume_update(context, volume_id,
{'status': 'error_attaching'})
volume = self.db.volume_attached(context.elevated(), volume_id,
instance_uuid,
host_name_sanitized, mountpoint)
self._notify_about_volume_usage(context, volume, "attach.end")