# # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. from heat.common import exception from heat.common.i18n import _ from heat.common.i18n import _LI from heat.engine import resource from heat.openstack.common import log as logging LOG = logging.getLogger(__name__) class VolumeExtendTask(object): """A task to resize volume using Cinder API.""" def __init__(self, stack, volume_id, size): self.clients = stack.clients self.volume_id = volume_id self.size = size def __str__(self): return _("Resizing volume %(vol)s to size %(size)i") % { 'vol': self.volume_id, 'size': self.size} def __repr__(self): return "%s(%s +-> %i)" % (type(self).__name__, self.volume_id, self.size) def __call__(self): LOG.debug(str(self)) cinder = self.clients.client('cinder').volumes vol = cinder.get(self.volume_id) try: cinder.extend(self.volume_id, self.size) except Exception as ex: if self.clients.client_plugin('cinder').is_client_exception(ex): raise exception.Error(_( "Failed to extend volume %(vol)s - %(err)s") % { 'vol': vol.id, 'err': str(ex)}) else: raise yield vol.get() while vol.status == 'extending': LOG.debug("Volume %s is being extended" % self.volume_id) yield vol.get() if vol.status != 'available': LOG.info(_LI("Resize failed: Volume %(vol)s is in %(status)s " "state."), {'vol': vol.id, 'status': vol.status}) raise resource.ResourceUnknownStatus( resource_status=vol.status, result=_('Volume resize failed')) LOG.info(_LI('%s - complete'), str(self)) class VolumeAttachTask(object): """A task for attaching a volume to a Nova server.""" def __init__(self, stack, server_id, volume_id, device): """ Initialise with the stack (for obtaining the clients), ID of the server and volume, and the device name on the server. """ self.clients = stack.clients self.server_id = server_id self.volume_id = volume_id self.device = device self.attachment_id = None def __str__(self): """Return a human-readable string description of the task.""" return 'Attaching Volume %s to Instance %s as %s' % (self.volume_id, self.server_id, self.device) def __repr__(self): """Return a brief string description of the task.""" return '%s(%s -> %s [%s])' % (type(self).__name__, self.volume_id, self.server_id, self.device) def __call__(self): """Return a co-routine which runs the task.""" LOG.debug(str(self)) va = self.clients.client('nova').volumes.create_server_volume( server_id=self.server_id, volume_id=self.volume_id, device=self.device) self.attachment_id = va.id yield vol = self.clients.client('cinder').volumes.get(self.volume_id) while vol.status == 'available' or vol.status == 'attaching': LOG.debug('%(name)s - volume status: %(status)s' % {'name': str(self), 'status': vol.status}) yield vol.get() if vol.status != 'in-use': LOG.info(_LI("Attachment failed - volume %(vol)s " "is in %(status)s status"), {"vol": vol.id, "status": vol.status}) raise resource.ResourceUnknownStatus( resource_status=vol.status, result=_('Volume attachment failed')) LOG.info(_LI('%s - complete'), str(self)) class VolumeDetachTask(object): """A task for detaching a volume from a Nova server.""" def __init__(self, stack, server_id, attachment_id): """ Initialise with the stack (for obtaining the clients), and the IDs of the server and volume. """ self.clients = stack.clients self.server_id = server_id self.attachment_id = attachment_id def __str__(self): """Return a human-readable string description of the task.""" return _('Removing attachment %(att)s from Instance %(srv)s') % { 'att': self.attachment_id, 'srv': self.server_id} def __repr__(self): """Return a brief string description of the task.""" return '%s(%s -/> %s)' % (type(self).__name__, self.attachment_id, self.server_id) def __call__(self): """Return a co-routine which runs the task.""" LOG.debug(str(self)) nova_plugin = self.clients.client_plugin('nova') cinder_plugin = self.clients.client_plugin('cinder') server_api = self.clients.client('nova').volumes # get reference to the volume while it is attached try: nova_vol = server_api.get_server_volume(self.server_id, self.attachment_id) vol = self.clients.client('cinder').volumes.get(nova_vol.id) except Exception as ex: if (cinder_plugin.is_not_found(ex) or nova_plugin.is_not_found(ex) or nova_plugin.is_bad_request(ex)): return else: raise # detach the volume using volume_attachment try: server_api.delete_server_volume(self.server_id, self.attachment_id) except Exception as ex: if nova_plugin.is_not_found(ex) or nova_plugin.is_bad_request(ex): pass else: raise yield try: while vol.status in ('in-use', 'detaching'): LOG.debug('%s - volume still in use' % str(self)) yield vol.get() LOG.info(_LI('%(name)s - status: %(status)s'), {'name': str(self), 'status': vol.status}) if vol.status != 'available': LOG.info(_LI("Detachment failed - volume %(vol)s " "is in %(status)s status"), {"vol": vol.id, "status": vol.status}) raise resource.ResourceUnknownStatus( resource_status=vol.status, result=_('Volume detachment failed')) except Exception as ex: cinder_plugin.ignore_not_found(ex) # The next check is needed for immediate reattachment when updating: # there might be some time between cinder marking volume as 'available' # and nova removing attachment from its own objects, so we # check that nova already knows that the volume is detached def server_has_attachment(server_id, attachment_id): try: server_api.get_server_volume(server_id, attachment_id) except Exception as ex: nova_plugin.ignore_not_found(ex) return False return True while server_has_attachment(self.server_id, self.attachment_id): LOG.info(_LI("Server %(srv)s still has attachment %(att)s."), {'att': self.attachment_id, 'srv': self.server_id}) yield LOG.info(_LI("Volume %(vol)s is detached from server %(srv)s"), {'vol': vol.id, 'srv': self.server_id})