Jason Kölker
9b1b65a439
Bugfix for lp901819
Move DB lookups out of the virt layer for bw usage.
Migrate to storing the mac address in the table.
Only lookup network label when sending usage events.
Attempt to use info_cache for label lookup before
punting to rpc call.
Change-Id: Iffb4bc220804be7d5fe26d6416b90cd747b72753
2297 lines
101 KiB
Python
2297 lines
101 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# Copyright 2011 Justin Santa Barbara
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Handles all processes relating to instances (guest vms).
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The :py:class:`ComputeManager` class is a :py:class:`nova.manager.Manager` that
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handles RPC calls relating to creating instances. It is responsible for
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building a disk image, launching it via the underlying virtualization driver,
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responding to calls to check its state, attaching persistent storage, and
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terminating it.
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**Related Flags**
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:instances_path: Where instances are kept on disk
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:compute_driver: Name of class that is used to handle virtualization, loaded
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by :func:`nova.utils.import_object`
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"""
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import contextlib
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import functools
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import os
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import socket
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import sys
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import tempfile
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import time
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from eventlet import greenthread
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from nova import block_device
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import nova.context
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from nova.compute import instance_types
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from nova.compute import power_state
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from nova.compute import task_states
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from nova.compute import utils as compute_utils
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from nova.compute import vm_states
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from nova import exception
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from nova import flags
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import nova.image
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from nova import log as logging
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from nova import manager
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from nova import network
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from nova.network import model as network_model
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from nova.notifier import api as notifier
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from nova.openstack.common import cfg
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from nova import rpc
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from nova import utils
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from nova.virt import driver
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from nova import vnc
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from nova import volume
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compute_opts = [
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cfg.StrOpt('instances_path',
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default='$state_path/instances',
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help='where instances are stored on disk'),
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cfg.StrOpt('compute_driver',
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default='nova.virt.connection.get_connection',
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help='Driver to use for controlling virtualization'),
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cfg.StrOpt('console_host',
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default=socket.gethostname(),
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help='Console proxy host to use to connect '
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'to instances on this host.'),
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cfg.IntOpt('live_migration_retry_count',
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default=30,
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help="Number of 1 second retries needed in live_migration"),
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cfg.IntOpt("reboot_timeout",
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default=0,
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help="Automatically hard reboot an instance if it has been "
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"stuck in a rebooting state longer than N seconds. "
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"Set to 0 to disable."),
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cfg.IntOpt("rescue_timeout",
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default=0,
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help="Automatically unrescue an instance after N seconds. "
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"Set to 0 to disable."),
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cfg.IntOpt("resize_confirm_window",
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default=0,
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help="Automatically confirm resizes after N seconds. "
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"Set to 0 to disable."),
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cfg.IntOpt('host_state_interval',
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default=120,
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help='Interval in seconds for querying the host status'),
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cfg.IntOpt("running_deleted_instance_timeout",
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default=0,
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help="Number of seconds after being deleted when a running "
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"instance should be considered eligible for cleanup."),
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cfg.IntOpt("running_deleted_instance_poll_interval",
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default=30,
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help="Number of periodic scheduler ticks to wait between "
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"runs of the cleanup task."),
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cfg.StrOpt("running_deleted_instance_action",
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default="noop",
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help="Action to take if a running deleted instance is detected."
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"Valid options are 'noop', 'log' and 'reap'. "
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"Set to 'noop' to disable."),
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cfg.BoolOpt("use_image_cache_manager",
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default=False,
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help="Whether to manage images in the local cache."),
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cfg.IntOpt("image_cache_manager_interval",
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default=3600,
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help="Number of periodic scheduler ticks to wait between "
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"runs of the image cache manager."),
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]
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FLAGS = flags.FLAGS
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FLAGS.add_options(compute_opts)
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LOG = logging.getLogger('nova.compute.manager')
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def publisher_id(host=None):
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return notifier.publisher_id("compute", host)
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def checks_instance_lock(function):
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"""Decorator to prevent action against locked instances for non-admins."""
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@functools.wraps(function)
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def decorated_function(self, context, instance_uuid, *args, **kwargs):
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LOG.info(_("check_instance_lock: decorating: |%s|"), function,
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context=context)
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LOG.info(_("check_instance_lock: arguments: |%(self)s| |%(context)s|"
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" |%(instance_uuid)s|") % locals(), context=context)
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locked = self.get_lock(context, instance_uuid)
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admin = context.is_admin
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LOG.info(_("check_instance_lock: locked: |%s|"), locked,
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context=context)
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LOG.info(_("check_instance_lock: admin: |%s|"), admin,
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context=context)
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# if admin or unlocked call function otherwise log error
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if admin or not locked:
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LOG.info(_("check_instance_lock: executing: |%s|"), function,
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context=context)
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function(self, context, instance_uuid, *args, **kwargs)
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else:
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LOG.error(_("check_instance_lock: not executing |%s|"),
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function, context=context)
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return False
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return decorated_function
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def wrap_instance_fault(function):
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"""Wraps a method to catch exceptions related to instances.
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This decorator wraps a method to catch any exceptions having to do with
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an instance that may get thrown. It then logs an instance fault in the db.
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"""
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@functools.wraps(function)
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def decorated_function(self, context, instance_uuid, *args, **kwargs):
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try:
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return function(self, context, instance_uuid, *args, **kwargs)
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except exception.InstanceNotFound:
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raise
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except Exception, e:
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with utils.save_and_reraise_exception():
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self.add_instance_fault_from_exc(context, instance_uuid, e)
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return decorated_function
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def _get_image_meta(context, image_ref):
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image_service, image_id = nova.image.get_image_service(context, image_ref)
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return image_service.show(context, image_id)
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class ComputeManager(manager.SchedulerDependentManager):
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"""Manages the running instances from creation to destruction."""
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def __init__(self, compute_driver=None, *args, **kwargs):
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"""Load configuration options and connect to the hypervisor."""
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# TODO(vish): sync driver creation logic with the rest of the system
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# and re-document the module docstring
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if not compute_driver:
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compute_driver = FLAGS.compute_driver
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try:
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self.driver = utils.check_isinstance(
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utils.import_object(compute_driver),
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driver.ComputeDriver)
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except ImportError as e:
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LOG.error(_("Unable to load the virtualization driver: %s") % (e))
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sys.exit(1)
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self.network_api = network.API()
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self.volume_api = volume.API()
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self.network_manager = utils.import_object(FLAGS.network_manager)
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self._last_host_check = 0
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self._last_bw_usage_poll = 0
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super(ComputeManager, self).__init__(service_name="compute",
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*args, **kwargs)
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def _instance_update(self, context, instance_id, **kwargs):
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"""Update an instance in the database using kwargs as value."""
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return self.db.instance_update(context, instance_id, kwargs)
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def _set_instance_error_state(self, context, instance_uuid):
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self._instance_update(context,
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instance_uuid,
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vm_state=vm_states.ERROR,
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task_state=None)
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def init_host(self):
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"""Initialization for a standalone compute service."""
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self.driver.init_host(host=self.host)
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context = nova.context.get_admin_context()
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instances = self.db.instance_get_all_by_host(context, self.host)
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for instance in instances:
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instance_uuid = instance['uuid']
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db_state = instance['power_state']
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drv_state = self._get_power_state(context, instance)
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expect_running = db_state == power_state.RUNNING \
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and drv_state != db_state
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LOG.debug(_('Current state of %(instance_uuid)s is %(drv_state)s, '
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'state in DB is %(db_state)s.'), locals())
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if (expect_running and FLAGS.resume_guests_state_on_host_boot)\
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or FLAGS.start_guests_on_host_boot:
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LOG.info(_('Rebooting instance %(instance_uuid)s after '
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'nova-compute restart.'), locals())
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self.reboot_instance(context, instance['uuid'])
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elif drv_state == power_state.RUNNING:
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# Hyper-V and VMWareAPI drivers will raise an exception
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try:
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net_info = self._get_instance_nw_info(context, instance)
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self.driver.ensure_filtering_rules_for_instance(instance,
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self._legacy_nw_info(net_info))
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except NotImplementedError:
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LOG.warning(_('Hypervisor driver does not '
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'support firewall rules'))
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def _get_power_state(self, context, instance):
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"""Retrieve the power state for the given instance."""
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LOG.debug(_('Checking state of %s'), instance['uuid'])
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try:
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return self.driver.get_info(instance['name'])["state"]
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except exception.NotFound:
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return power_state.FAILED
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def get_console_topic(self, context, **kwargs):
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"""Retrieves the console host for a project on this host.
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Currently this is just set in the flags for each compute host.
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"""
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#TODO(mdragon): perhaps make this variable by console_type?
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return self.db.queue_get_for(context,
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FLAGS.console_topic,
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FLAGS.console_host)
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def get_console_pool_info(self, context, console_type):
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return self.driver.get_console_pool_info(console_type)
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@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
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def refresh_security_group_rules(self, context, security_group_id,
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**kwargs):
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"""Tell the virtualization driver to refresh security group rules.
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Passes straight through to the virtualization driver.
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"""
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return self.driver.refresh_security_group_rules(security_group_id)
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@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
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def refresh_security_group_members(self, context,
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security_group_id, **kwargs):
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"""Tell the virtualization driver to refresh security group members.
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Passes straight through to the virtualization driver.
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"""
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return self.driver.refresh_security_group_members(security_group_id)
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@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
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def refresh_provider_fw_rules(self, context, **kwargs):
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"""This call passes straight through to the virtualization driver."""
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return self.driver.refresh_provider_fw_rules(**kwargs)
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def _get_instance_nw_info(self, context, instance):
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"""Get a list of dictionaries of network data of an instance.
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Returns an empty list if stub_network flag is set."""
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if FLAGS.stub_network:
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return network_model.NetworkInfo()
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# get the network info from network
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network_info = self.network_api.get_instance_nw_info(context,
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instance)
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return network_info
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def _legacy_nw_info(self, network_info):
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"""Converts the model nw_info object to legacy style"""
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if self.driver.legacy_nwinfo():
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network_info = compute_utils.legacy_network_info(network_info)
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return network_info
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def _setup_block_device_mapping(self, context, instance):
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"""setup volumes for block device mapping"""
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block_device_mapping = []
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swap = None
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ephemerals = []
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for bdm in self.db.block_device_mapping_get_all_by_instance(
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context, instance['id']):
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LOG.debug(_("setting up bdm %s"), bdm)
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if bdm['no_device']:
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continue
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if bdm['virtual_name']:
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virtual_name = bdm['virtual_name']
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device_name = bdm['device_name']
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assert block_device.is_swap_or_ephemeral(virtual_name)
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if virtual_name == 'swap':
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swap = {'device_name': device_name,
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'swap_size': bdm['volume_size']}
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elif block_device.is_ephemeral(virtual_name):
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eph = {'num': block_device.ephemeral_num(virtual_name),
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'virtual_name': virtual_name,
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'device_name': device_name,
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'size': bdm['volume_size']}
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ephemerals.append(eph)
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continue
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if ((bdm['snapshot_id'] is not None) and
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(bdm['volume_id'] is None)):
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# TODO(yamahata): default name and description
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snapshot = self.volume_api.get_snapshot(context,
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bdm['snapshot_id'])
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vol = self.volume_api.create(context, bdm['volume_size'],
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'', '', snapshot)
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# TODO(yamahata): creating volume simultaneously
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# reduces creation time?
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self.volume_api.wait_creation(context, vol)
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self.db.block_device_mapping_update(
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context, bdm['id'], {'volume_id': vol['id']})
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bdm['volume_id'] = vol['id']
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if bdm['volume_id'] is not None:
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volume = self.volume_api.get(context, bdm['volume_id'])
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self.volume_api.check_attach(context, volume)
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cinfo = self._attach_volume_boot(context,
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instance,
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volume,
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bdm['device_name'])
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self.db.block_device_mapping_update(
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context, bdm['id'],
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{'connection_info': utils.dumps(cinfo)})
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block_device_mapping.append({'connection_info': cinfo,
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'mount_device':
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bdm['device_name']})
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return {
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'root_device_name': instance['root_device_name'],
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'swap': swap,
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'ephemerals': ephemerals,
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'block_device_mapping': block_device_mapping
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}
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def _is_instance_terminated(self, instance_uuid):
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"""Instance in DELETING task state or not found in DB"""
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context = nova.context.get_admin_context()
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try:
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instance = self.db.instance_get_by_uuid(context, instance_uuid)
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if instance['task_state'] == task_states.DELETING:
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return True
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return False
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except Exception:
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return True
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|
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def _shutdown_instance_even_if_deleted(self, context, instance_uuid):
|
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"""Call terminate_instance even for already deleted instances"""
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LOG.info(_("Going to force the deletion of the vm %(instance_uuid)s, "
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"even if it is deleted") % locals())
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try:
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try:
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self.terminate_instance(context, instance_uuid)
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except exception.InstanceNotFound:
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LOG.info(_("Instance %(instance_uuid)s did not exist in the "
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"DB, but I will shut it down anyway using a special "
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"context") % locals())
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ctxt = nova.context.get_admin_context(True)
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self.terminate_instance(ctxt, instance_uuid)
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except Exception as ex:
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LOG.info(_("exception terminating the instance "
|
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"%(instance_uuid)s") % locals())
|
|
|
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def _run_instance(self, context, instance_uuid,
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requested_networks=None,
|
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injected_files=[],
|
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admin_password=None,
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**kwargs):
|
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"""Launch a new instance with specified options."""
|
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context = context.elevated()
|
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try:
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instance = self.db.instance_get_by_uuid(context, instance_uuid)
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self._check_instance_not_already_created(context, instance)
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image_meta = self._check_image_size(context, instance)
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self._start_building(context, instance)
|
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self._notify_about_instance_usage(instance, "create.start")
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network_info = self._allocate_network(context, instance,
|
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requested_networks)
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try:
|
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block_device_info = self._prep_block_device(context, instance)
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instance = self._spawn(context, instance, image_meta,
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network_info, block_device_info,
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injected_files, admin_password)
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except Exception:
|
|
with utils.save_and_reraise_exception():
|
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self._deallocate_network(context, instance)
|
|
|
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self._notify_about_instance_usage(instance, "create.end",
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network_info=network_info)
|
|
|
|
if self._is_instance_terminated(instance_uuid):
|
|
raise exception.InstanceNotFound
|
|
except exception.InstanceNotFound:
|
|
LOG.exception(_("Instance %s not found.") % instance_uuid)
|
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# assuming the instance was already deleted, run "delete" again
|
|
# just in case
|
|
self._shutdown_instance_even_if_deleted(context, instance_uuid)
|
|
return
|
|
except Exception as e:
|
|
with utils.save_and_reraise_exception():
|
|
self._instance_update(context, instance_uuid,
|
|
vm_state=vm_states.ERROR)
|
|
|
|
def _check_instance_not_already_created(self, context, instance):
|
|
"""Ensure an instance with the same name is not already present."""
|
|
if instance['name'] in self.driver.list_instances():
|
|
raise exception.Error(_("Instance has already been created"))
|
|
|
|
def _check_image_size(self, context, instance):
|
|
"""Ensure image is smaller than the maximum size allowed by the
|
|
instance_type.
|
|
|
|
The image stored in Glance is potentially compressed, so we use two
|
|
checks to ensure that the size isn't exceeded:
|
|
|
|
1) This one - checks compressed size, this a quick check to
|
|
eliminate any images which are obviously too large
|
|
|
|
2) Check uncompressed size in nova.virt.xenapi.vm_utils. This
|
|
is a slower check since it requires uncompressing the entire
|
|
image, but is accurate because it reflects the image's
|
|
actual size.
|
|
"""
|
|
image_meta = _get_image_meta(context, instance['image_ref'])
|
|
|
|
try:
|
|
size_bytes = image_meta['size']
|
|
except KeyError:
|
|
# Size is not a required field in the image service (yet), so
|
|
# we are unable to rely on it being there even though it's in
|
|
# glance.
|
|
|
|
# TODO(jk0): Should size be required in the image service?
|
|
return image_meta
|
|
|
|
instance_type_id = instance['instance_type_id']
|
|
instance_type = instance_types.get_instance_type(instance_type_id)
|
|
allowed_size_gb = instance_type['root_gb']
|
|
|
|
# NOTE(johannes): root_gb is allowed to be 0 for legacy reasons
|
|
# since libvirt interpreted the value differently than other
|
|
# drivers. A value of 0 means don't check size.
|
|
if not allowed_size_gb:
|
|
return image_meta
|
|
|
|
allowed_size_bytes = allowed_size_gb * 1024 * 1024 * 1024
|
|
|
|
image_id = image_meta['id']
|
|
LOG.debug(_("image_id=%(image_id)s, image_size_bytes="
|
|
"%(size_bytes)d, allowed_size_bytes="
|
|
"%(allowed_size_bytes)d") % locals())
|
|
|
|
if size_bytes > allowed_size_bytes:
|
|
LOG.info(_("Image '%(image_id)s' size %(size_bytes)d exceeded"
|
|
" instance_type allowed size "
|
|
"%(allowed_size_bytes)d")
|
|
% locals())
|
|
raise exception.ImageTooLarge()
|
|
|
|
return image_meta
|
|
|
|
def _start_building(self, context, instance):
|
|
"""Save the host and launched_on fields and log appropriately."""
|
|
LOG.audit(_("instance %s: starting..."), instance['uuid'],
|
|
context=context)
|
|
self._instance_update(context, instance['uuid'],
|
|
host=self.host, launched_on=self.host,
|
|
vm_state=vm_states.BUILDING,
|
|
task_state=None)
|
|
|
|
def _allocate_network(self, context, instance, requested_networks):
|
|
"""Allocate networks for an instance and return the network info"""
|
|
if FLAGS.stub_network:
|
|
msg = _("Skipping network allocation for instance %s")
|
|
LOG.debug(msg % instance['uuid'])
|
|
return network_model.NetworkInfo()
|
|
self._instance_update(context, instance['uuid'],
|
|
vm_state=vm_states.BUILDING,
|
|
task_state=task_states.NETWORKING)
|
|
is_vpn = instance['image_ref'] == str(FLAGS.vpn_image_id)
|
|
try:
|
|
# allocate and get network info
|
|
network_info = self.network_api.allocate_for_instance(
|
|
context, instance, vpn=is_vpn,
|
|
requested_networks=requested_networks)
|
|
except Exception:
|
|
msg = _("Instance %s failed network setup")
|
|
LOG.exception(msg % instance['uuid'])
|
|
raise
|
|
|
|
LOG.debug(_("instance network_info: |%s|"), network_info)
|
|
|
|
return network_info
|
|
|
|
def _prep_block_device(self, context, instance):
|
|
"""Set up the block device for an instance with error logging"""
|
|
self._instance_update(context, instance['uuid'],
|
|
vm_state=vm_states.BUILDING,
|
|
task_state=task_states.BLOCK_DEVICE_MAPPING)
|
|
try:
|
|
return self._setup_block_device_mapping(context, instance)
|
|
except Exception:
|
|
msg = _("Instance %s failed block device setup")
|
|
LOG.exception(msg % instance['uuid'])
|
|
raise
|
|
|
|
def _spawn(self, context, instance, image_meta, network_info,
|
|
block_device_info, injected_files, admin_pass):
|
|
"""Spawn an instance with error logging and update its power state"""
|
|
self._instance_update(context, instance['uuid'],
|
|
vm_state=vm_states.BUILDING,
|
|
task_state=task_states.SPAWNING)
|
|
instance['injected_files'] = injected_files
|
|
instance['admin_pass'] = admin_pass
|
|
try:
|
|
self.driver.spawn(context, instance, image_meta,
|
|
self._legacy_nw_info(network_info), block_device_info)
|
|
except Exception:
|
|
msg = _("Instance %s failed to spawn")
|
|
LOG.exception(msg % instance['uuid'])
|
|
raise
|
|
|
|
current_power_state = self._get_power_state(context, instance)
|
|
return self._instance_update(context, instance['uuid'],
|
|
power_state=current_power_state,
|
|
vm_state=vm_states.ACTIVE,
|
|
task_state=None,
|
|
launched_at=utils.utcnow())
|
|
|
|
def _notify_about_instance_usage(self, instance, event_suffix,
|
|
usage_info=None, network_info=None):
|
|
if not usage_info:
|
|
usage_info = utils.usage_from_instance(instance,
|
|
network_info=network_info)
|
|
notifier.notify('compute.%s' % self.host,
|
|
'compute.instance.%s' % event_suffix,
|
|
notifier.INFO, usage_info)
|
|
|
|
def _deallocate_network(self, context, instance):
|
|
if not FLAGS.stub_network:
|
|
msg = _("deallocating network for instance: %s")
|
|
LOG.debug(msg % instance['uuid'])
|
|
self.network_api.deallocate_for_instance(context, instance)
|
|
|
|
def _get_instance_volume_bdms(self, context, instance_id):
|
|
bdms = self.db.block_device_mapping_get_all_by_instance(context,
|
|
instance_id)
|
|
return [bdm for bdm in bdms if bdm['volume_id']]
|
|
|
|
def _get_instance_volume_bdm(self, context, instance_id, volume_id):
|
|
bdms = self._get_instance_volume_bdms(context, instance_id)
|
|
for bdm in bdms:
|
|
# NOTE(vish): Comparing as strings because the os_api doesn't
|
|
# convert to integer and we may wish to support uuids
|
|
# in the future.
|
|
if str(bdm['volume_id']) == str(volume_id):
|
|
return bdm
|
|
|
|
def _get_instance_volume_block_device_info(self, context, instance_id):
|
|
bdms = self._get_instance_volume_bdms(context, instance_id)
|
|
block_device_mapping = []
|
|
for bdm in bdms:
|
|
cinfo = utils.loads(bdm['connection_info'])
|
|
block_device_mapping.append({'connection_info': cinfo,
|
|
'mount_device':
|
|
bdm['device_name']})
|
|
# NOTE(vish): The mapping is passed in so the driver can disconnect
|
|
# from remote volumes if necessary
|
|
return {'block_device_mapping': block_device_mapping}
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@wrap_instance_fault
|
|
def run_instance(self, context, instance_uuid, **kwargs):
|
|
self._run_instance(context, instance_uuid, **kwargs)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def start_instance(self, context, instance_uuid):
|
|
"""Starting an instance on this host."""
|
|
# TODO(yamahata): injected_files isn't supported.
|
|
# Anyway OSAPI doesn't support stop/start yet
|
|
# FIXME(vish): I've kept the files during stop instance, but
|
|
# I think start will fail due to the files still
|
|
self._run_instance(context, instance_uuid)
|
|
|
|
def _shutdown_instance(self, context, instance, action_str):
|
|
"""Shutdown an instance on this host."""
|
|
context = context.elevated()
|
|
instance_id = instance['id']
|
|
instance_uuid = instance['uuid']
|
|
LOG.audit(_("%(action_str)s instance %(instance_uuid)s") %
|
|
{'action_str': action_str, 'instance_uuid': instance_uuid},
|
|
context=context)
|
|
|
|
# get network info before tearing down
|
|
network_info = self._get_instance_nw_info(context, instance)
|
|
# tear down allocated network structure
|
|
self._deallocate_network(context, instance)
|
|
|
|
if instance['power_state'] == power_state.SHUTOFF:
|
|
self.db.instance_destroy(context, instance_id)
|
|
raise exception.Error(_('trying to destroy already destroyed'
|
|
' instance: %s') % instance_uuid)
|
|
# NOTE(vish) get bdms before destroying the instance
|
|
bdms = self._get_instance_volume_bdms(context, instance_id)
|
|
block_device_info = self._get_instance_volume_block_device_info(
|
|
context, instance_id)
|
|
self.driver.destroy(instance, self._legacy_nw_info(network_info),
|
|
block_device_info)
|
|
for bdm in bdms:
|
|
try:
|
|
# NOTE(vish): actual driver detach done in driver.destroy, so
|
|
# just tell nova-volume that we are done with it.
|
|
volume = self.volume_api.get(context, bdm['volume_id'])
|
|
connector = self.driver.get_volume_connector(instance)
|
|
self.volume_api.terminate_connection(context,
|
|
volume,
|
|
connector)
|
|
self.volume_api.detach(context, volume)
|
|
except exception.DiskNotFound as exc:
|
|
LOG.warn(_("Ignoring DiskNotFound: %s") % exc)
|
|
|
|
def _cleanup_volumes(self, context, instance_id):
|
|
bdms = self.db.block_device_mapping_get_all_by_instance(context,
|
|
instance_id)
|
|
for bdm in bdms:
|
|
LOG.debug(_("terminating bdm %s") % bdm)
|
|
if bdm['volume_id'] and bdm['delete_on_termination']:
|
|
volume = self.volume_api.get(context, bdm['volume_id'])
|
|
self.volume_api.delete(context, volume)
|
|
# NOTE(vish): bdms will be deleted on instance destroy
|
|
|
|
def _delete_instance(self, context, instance):
|
|
"""Delete an instance on this host."""
|
|
instance_id = instance['id']
|
|
self._notify_about_instance_usage(instance, "delete.start")
|
|
self._shutdown_instance(context, instance, 'Terminating')
|
|
self._cleanup_volumes(context, instance_id)
|
|
self._instance_update(context,
|
|
instance_id,
|
|
vm_state=vm_states.DELETED,
|
|
task_state=None,
|
|
terminated_at=utils.utcnow())
|
|
|
|
self.db.instance_destroy(context, instance_id)
|
|
self._notify_about_instance_usage(instance, "delete.end")
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def terminate_instance(self, context, instance_uuid):
|
|
"""Terminate an instance on this host."""
|
|
elevated = context.elevated()
|
|
instance = self.db.instance_get_by_uuid(elevated, instance_uuid)
|
|
compute_utils.notify_usage_exists(instance, current_period=True)
|
|
self._delete_instance(context, instance)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def stop_instance(self, context, instance_uuid):
|
|
"""Stopping an instance on this host."""
|
|
instance = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
self._shutdown_instance(context, instance, 'Stopping')
|
|
self._instance_update(context,
|
|
instance_uuid,
|
|
vm_state=vm_states.STOPPED,
|
|
task_state=None)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def power_off_instance(self, context, instance_uuid):
|
|
"""Power off an instance on this host."""
|
|
instance = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
self.driver.power_off(instance)
|
|
current_power_state = self._get_power_state(context, instance)
|
|
self._instance_update(context,
|
|
instance_uuid,
|
|
power_state=current_power_state,
|
|
task_state=None)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def power_on_instance(self, context, instance_uuid):
|
|
"""Power on an instance on this host."""
|
|
instance = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
self.driver.power_on(instance)
|
|
current_power_state = self._get_power_state(context, instance)
|
|
self._instance_update(context,
|
|
instance_uuid,
|
|
power_state=current_power_state,
|
|
task_state=None)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def rebuild_instance(self, context, instance_uuid, **kwargs):
|
|
"""Destroy and re-make this instance.
|
|
|
|
A 'rebuild' effectively purges all existing data from the system and
|
|
remakes the VM with given 'metadata' and 'personalities'.
|
|
|
|
:param context: `nova.RequestContext` object
|
|
:param instance_uuid: Instance Identifier (UUID)
|
|
:param injected_files: Files to inject
|
|
:param new_pass: password to set on rebuilt instance
|
|
"""
|
|
try:
|
|
self._rebuild_instance(context, instance_uuid, kwargs)
|
|
except exception.ImageNotFound:
|
|
msg = _("Cannot rebuild instance [%(instance_uuid)s]"
|
|
", because the given image does not exist.")
|
|
LOG.error(msg % instance_uuid, context=context)
|
|
self._set_instance_error_state(context, instance_uuid)
|
|
except Exception as exc:
|
|
msg = _("Cannot rebuild instance [%(instance_uuid)s]: %(exc)s")
|
|
LOG.error(msg % locals(), context=context)
|
|
self._set_instance_error_state(context, instance_uuid)
|
|
|
|
def _rebuild_instance(self, context, instance_uuid, kwargs):
|
|
context = context.elevated()
|
|
|
|
LOG.audit(_("Rebuilding instance %s"), instance_uuid, context=context)
|
|
|
|
instance = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
self._notify_about_instance_usage(instance, "rebuild.start")
|
|
current_power_state = self._get_power_state(context, instance)
|
|
self._instance_update(context,
|
|
instance_uuid,
|
|
power_state=current_power_state,
|
|
vm_state=vm_states.REBUILDING,
|
|
task_state=None)
|
|
|
|
network_info = self._get_instance_nw_info(context, instance)
|
|
self.driver.destroy(instance, self._legacy_nw_info(network_info))
|
|
|
|
self._instance_update(context,
|
|
instance_uuid,
|
|
vm_state=vm_states.REBUILDING,
|
|
task_state=task_states.BLOCK_DEVICE_MAPPING)
|
|
|
|
instance.injected_files = kwargs.get('injected_files', [])
|
|
network_info = self.network_api.get_instance_nw_info(context,
|
|
instance)
|
|
device_info = self._setup_block_device_mapping(context, instance)
|
|
|
|
self._instance_update(context,
|
|
instance_uuid,
|
|
vm_state=vm_states.REBUILDING,
|
|
task_state=task_states.SPAWNING)
|
|
# pull in new password here since the original password isn't in the db
|
|
instance.admin_pass = kwargs.get('new_pass',
|
|
utils.generate_password(FLAGS.password_length))
|
|
|
|
image_meta = _get_image_meta(context, instance['image_ref'])
|
|
|
|
self.driver.spawn(context, instance, image_meta,
|
|
self._legacy_nw_info(network_info), device_info)
|
|
|
|
current_power_state = self._get_power_state(context, instance)
|
|
self._instance_update(context,
|
|
instance_uuid,
|
|
power_state=current_power_state,
|
|
vm_state=vm_states.ACTIVE,
|
|
task_state=None,
|
|
launched_at=utils.utcnow())
|
|
|
|
self._notify_about_instance_usage(instance, "rebuild.end",
|
|
network_info=network_info)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def reboot_instance(self, context, instance_uuid, reboot_type="SOFT"):
|
|
"""Reboot an instance on this host."""
|
|
LOG.audit(_("Rebooting instance %s"), instance_uuid, context=context)
|
|
context = context.elevated()
|
|
instance = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
|
|
self._notify_about_instance_usage(instance, "reboot.start")
|
|
|
|
current_power_state = self._get_power_state(context, instance)
|
|
self._instance_update(context,
|
|
instance_uuid,
|
|
power_state=current_power_state,
|
|
vm_state=vm_states.ACTIVE)
|
|
|
|
if instance['power_state'] != power_state.RUNNING:
|
|
state = instance['power_state']
|
|
running = power_state.RUNNING
|
|
LOG.warn(_('trying to reboot a non-running '
|
|
'instance: %(instance_uuid)s (state: %(state)s '
|
|
'expected: %(running)s)') % locals(),
|
|
context=context)
|
|
|
|
network_info = self._get_instance_nw_info(context, instance)
|
|
self.driver.reboot(instance, self._legacy_nw_info(network_info),
|
|
reboot_type)
|
|
|
|
current_power_state = self._get_power_state(context, instance)
|
|
self._instance_update(context,
|
|
instance_uuid,
|
|
power_state=current_power_state,
|
|
vm_state=vm_states.ACTIVE,
|
|
task_state=None)
|
|
|
|
self._notify_about_instance_usage(instance, "reboot.end")
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@wrap_instance_fault
|
|
def snapshot_instance(self, context, instance_uuid, image_id,
|
|
image_type='snapshot', backup_type=None,
|
|
rotation=None):
|
|
"""Snapshot an instance on this host.
|
|
|
|
:param context: security context
|
|
:param instance_uuid: nova.db.sqlalchemy.models.Instance.Uuid
|
|
:param image_id: glance.db.sqlalchemy.models.Image.Id
|
|
:param image_type: snapshot | backup
|
|
:param backup_type: daily | weekly
|
|
:param rotation: int representing how many backups to keep around;
|
|
None if rotation shouldn't be used (as in the case of snapshots)
|
|
"""
|
|
if image_type == "snapshot":
|
|
task_state = task_states.IMAGE_SNAPSHOT
|
|
elif image_type == "backup":
|
|
task_state = task_states.IMAGE_BACKUP
|
|
else:
|
|
raise Exception(_('Image type not recognized %s') % image_type)
|
|
|
|
context = context.elevated()
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
|
|
current_power_state = self._get_power_state(context, instance_ref)
|
|
self._instance_update(context,
|
|
instance_ref['id'],
|
|
power_state=current_power_state,
|
|
vm_state=vm_states.ACTIVE,
|
|
task_state=task_state)
|
|
|
|
LOG.audit(_('instance %s: snapshotting'), instance_uuid,
|
|
context=context)
|
|
|
|
if instance_ref['power_state'] != power_state.RUNNING:
|
|
state = instance_ref['power_state']
|
|
running = power_state.RUNNING
|
|
LOG.warn(_('trying to snapshot a non-running '
|
|
'instance: %(instance_uuid)s (state: %(state)s '
|
|
'expected: %(running)s)') % locals())
|
|
|
|
try:
|
|
self.driver.snapshot(context, instance_ref, image_id)
|
|
finally:
|
|
self._instance_update(context, instance_ref['id'], task_state=None)
|
|
|
|
if image_type == 'snapshot' and rotation:
|
|
raise exception.ImageRotationNotAllowed()
|
|
|
|
elif image_type == 'backup' and rotation:
|
|
self.rotate_backups(context, instance_uuid, backup_type, rotation)
|
|
|
|
elif image_type == 'backup':
|
|
raise exception.RotationRequiredForBackup()
|
|
|
|
@wrap_instance_fault
|
|
def rotate_backups(self, context, instance_uuid, backup_type, rotation):
|
|
"""Delete excess backups associated to an instance.
|
|
|
|
Instances are allowed a fixed number of backups (the rotation number);
|
|
this method deletes the oldest backups that exceed the rotation
|
|
threshold.
|
|
|
|
:param context: security context
|
|
:param instance_uuid: string representing uuid of instance
|
|
:param backup_type: daily | weekly
|
|
:param rotation: int representing how many backups to keep around;
|
|
None if rotation shouldn't be used (as in the case of snapshots)
|
|
"""
|
|
# NOTE(jk0): Eventually extract this out to the ImageService?
|
|
def fetch_images():
|
|
images = []
|
|
marker = None
|
|
while True:
|
|
batch = image_service.detail(context, filters=filters,
|
|
marker=marker, sort_key='created_at', sort_dir='desc')
|
|
if not batch:
|
|
break
|
|
images += batch
|
|
marker = batch[-1]['id']
|
|
return images
|
|
|
|
image_service = nova.image.get_default_image_service()
|
|
filters = {'property-image_type': 'backup',
|
|
'property-backup_type': backup_type,
|
|
'property-instance_uuid': instance_uuid}
|
|
|
|
images = fetch_images()
|
|
num_images = len(images)
|
|
LOG.debug(_("Found %(num_images)d images (rotation: %(rotation)d)"
|
|
% locals()))
|
|
if num_images > rotation:
|
|
# NOTE(sirp): this deletes all backups that exceed the rotation
|
|
# limit
|
|
excess = len(images) - rotation
|
|
LOG.debug(_("Rotating out %d backups" % excess))
|
|
for i in xrange(excess):
|
|
image = images.pop()
|
|
image_id = image['id']
|
|
LOG.debug(_("Deleting image %s" % image_id))
|
|
image_service.delete(context, image_id)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def set_admin_password(self, context, instance_uuid, new_pass=None):
|
|
"""Set the root/admin password for an instance on this host.
|
|
|
|
This is generally only called by API password resets after an
|
|
image has been built.
|
|
"""
|
|
|
|
context = context.elevated()
|
|
|
|
if new_pass is None:
|
|
# Generate a random password
|
|
new_pass = utils.generate_password(FLAGS.password_length)
|
|
|
|
max_tries = 10
|
|
|
|
for i in xrange(max_tries):
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
instance_id = instance_ref["id"]
|
|
instance_state = instance_ref["power_state"]
|
|
expected_state = power_state.RUNNING
|
|
|
|
if instance_state != expected_state:
|
|
self._instance_update(context, instance_id, task_state=None)
|
|
raise exception.Error(_('Failed to set admin password. '
|
|
'Instance %s is not running') %
|
|
instance_ref["uuid"])
|
|
else:
|
|
try:
|
|
self.driver.set_admin_password(instance_ref, new_pass)
|
|
LOG.audit(_("Instance %s: Root password set"),
|
|
instance_ref["uuid"])
|
|
self._instance_update(context,
|
|
instance_id,
|
|
task_state=None)
|
|
break
|
|
except NotImplementedError:
|
|
# NOTE(dprince): if the driver doesn't implement
|
|
# set_admin_password we break to avoid a loop
|
|
LOG.warn(_('set_admin_password is not implemented '
|
|
'by this driver.'))
|
|
self._instance_update(context,
|
|
instance_id,
|
|
task_state=None)
|
|
break
|
|
except Exception, e:
|
|
# Catch all here because this could be anything.
|
|
LOG.exception(e)
|
|
if i == max_tries - 1:
|
|
self._set_instance_error_state(context, instance_id)
|
|
# We create a new exception here so that we won't
|
|
# potentially reveal password information to the
|
|
# API caller. The real exception is logged above
|
|
_msg = _('Error setting admin password')
|
|
raise exception.Error(_msg)
|
|
time.sleep(1)
|
|
continue
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def inject_file(self, context, instance_uuid, path, file_contents):
|
|
"""Write a file to the specified path in an instance on this host."""
|
|
context = context.elevated()
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
instance_state = instance_ref['power_state']
|
|
expected_state = power_state.RUNNING
|
|
if instance_state != expected_state:
|
|
LOG.warn(_('trying to inject a file into a non-running '
|
|
'instance: %(instance_uuid)s (state: %(instance_state)s '
|
|
'expected: %(expected_state)s)') % locals())
|
|
instance_uuid = instance_ref['uuid']
|
|
msg = _('instance %(instance_uuid)s: injecting file to %(path)s')
|
|
LOG.audit(msg % locals())
|
|
self.driver.inject_file(instance_ref, path, file_contents)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def agent_update(self, context, instance_uuid, url, md5hash):
|
|
"""Update agent running on an instance on this host."""
|
|
context = context.elevated()
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
instance_state = instance_ref['power_state']
|
|
expected_state = power_state.RUNNING
|
|
if instance_state != expected_state:
|
|
LOG.warn(_('trying to update agent on a non-running '
|
|
'instance: %(instance_uuid)s (state: %(instance_state)s '
|
|
'expected: %(expected_state)s)') % locals())
|
|
instance_uuid = instance_ref['uuid']
|
|
msg = _('instance %(instance_uuid)s: updating agent to %(url)s')
|
|
LOG.audit(msg % locals())
|
|
self.driver.agent_update(instance_ref, url, md5hash)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def rescue_instance(self, context, instance_uuid, **kwargs):
|
|
"""
|
|
Rescue an instance on this host.
|
|
:param rescue_password: password to set on rescue instance
|
|
"""
|
|
|
|
LOG.audit(_('instance %s: rescuing'), instance_uuid, context=context)
|
|
context = context.elevated()
|
|
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
instance_ref.admin_pass = kwargs.get('rescue_password',
|
|
utils.generate_password(FLAGS.password_length))
|
|
network_info = self._get_instance_nw_info(context, instance_ref)
|
|
image_meta = _get_image_meta(context, instance_ref['image_ref'])
|
|
|
|
with self.error_out_instance_on_exception(context, instance_uuid):
|
|
self.driver.rescue(context, instance_ref,
|
|
self._legacy_nw_info(network_info), image_meta)
|
|
|
|
current_power_state = self._get_power_state(context, instance_ref)
|
|
self._instance_update(context,
|
|
instance_uuid,
|
|
vm_state=vm_states.RESCUED,
|
|
task_state=None,
|
|
power_state=current_power_state)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def unrescue_instance(self, context, instance_uuid):
|
|
"""Rescue an instance on this host."""
|
|
LOG.audit(_('instance %s: unrescuing'), instance_uuid, context=context)
|
|
context = context.elevated()
|
|
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
network_info = self._get_instance_nw_info(context, instance_ref)
|
|
|
|
with self.error_out_instance_on_exception(context, instance_uuid):
|
|
self.driver.unrescue(instance_ref,
|
|
self._legacy_nw_info(network_info))
|
|
|
|
current_power_state = self._get_power_state(context, instance_ref)
|
|
self._instance_update(context,
|
|
instance_uuid,
|
|
vm_state=vm_states.ACTIVE,
|
|
task_state=None,
|
|
power_state=current_power_state)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def confirm_resize(self, context, instance_uuid, migration_id):
|
|
"""Destroys the source instance."""
|
|
migration_ref = self.db.migration_get(context, migration_id)
|
|
instance_ref = self.db.instance_get_by_uuid(context,
|
|
migration_ref.instance_uuid)
|
|
|
|
self._notify_about_instance_usage(instance_ref,
|
|
"resize.confirm.start")
|
|
|
|
network_info = self._get_instance_nw_info(context, instance_ref)
|
|
self.driver.confirm_migration(migration_ref, instance_ref,
|
|
self._legacy_nw_info(network_info))
|
|
|
|
self._notify_about_instance_usage(instance_ref, "resize.confirm.end",
|
|
network_info=network_info)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def revert_resize(self, context, instance_uuid, migration_id):
|
|
"""Destroys the new instance on the destination machine.
|
|
|
|
Reverts the model changes, and powers on the old instance on the
|
|
source machine.
|
|
|
|
"""
|
|
migration_ref = self.db.migration_get(context, migration_id)
|
|
instance_ref = self.db.instance_get_by_uuid(context,
|
|
migration_ref.instance_uuid)
|
|
|
|
network_info = self._get_instance_nw_info(context, instance_ref)
|
|
self.driver.destroy(instance_ref, self._legacy_nw_info(network_info))
|
|
topic = self.db.queue_get_for(context, FLAGS.compute_topic,
|
|
migration_ref['source_compute'])
|
|
rpc.cast(context, topic,
|
|
{'method': 'finish_revert_resize',
|
|
'args': {'instance_uuid': instance_ref['uuid'],
|
|
'migration_id': migration_ref['id']},
|
|
})
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def finish_revert_resize(self, context, instance_uuid, migration_id):
|
|
"""Finishes the second half of reverting a resize.
|
|
|
|
Power back on the source instance and revert the resized attributes
|
|
in the database.
|
|
|
|
"""
|
|
migration_ref = self.db.migration_get(context, migration_id)
|
|
instance_ref = self.db.instance_get_by_uuid(context,
|
|
migration_ref.instance_uuid)
|
|
|
|
self._notify_about_instance_usage(instance_ref, "resize.revert.start")
|
|
|
|
old_instance_type = migration_ref['old_instance_type_id']
|
|
instance_type = instance_types.get_instance_type(old_instance_type)
|
|
|
|
# Just roll back the record. There's no need to resize down since
|
|
# the 'old' VM already has the preferred attributes
|
|
self._instance_update(context,
|
|
instance_ref["uuid"],
|
|
memory_mb=instance_type['memory_mb'],
|
|
host=migration_ref['source_compute'],
|
|
vcpus=instance_type['vcpus'],
|
|
root_gb=instance_type['root_gb'],
|
|
ephemeral_gb=instance_type['ephemeral_gb'],
|
|
instance_type_id=instance_type['id'])
|
|
|
|
self.driver.finish_revert_migration(instance_ref)
|
|
self.db.migration_update(context, migration_id,
|
|
{'status': 'reverted'})
|
|
|
|
self._notify_about_instance_usage(instance_ref, "resize.revert.end")
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def prep_resize(self, context, instance_uuid, instance_type_id, **kwargs):
|
|
"""Initiates the process of moving a running instance to another host.
|
|
|
|
Possibly changes the RAM and disk size in the process.
|
|
|
|
"""
|
|
context = context.elevated()
|
|
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
|
|
compute_utils.notify_usage_exists(instance_ref, current_period=True)
|
|
self._notify_about_instance_usage(instance_ref, "resize.prep.start")
|
|
|
|
same_host = instance_ref['host'] == FLAGS.host
|
|
if same_host and not FLAGS.allow_resize_to_same_host:
|
|
self._instance_update(context,
|
|
instance_uuid,
|
|
vm_state=vm_states.ERROR)
|
|
msg = _('destination same as source!')
|
|
raise exception.MigrationError(msg)
|
|
|
|
old_instance_type_id = instance_ref['instance_type_id']
|
|
old_instance_type = instance_types.get_instance_type(
|
|
old_instance_type_id)
|
|
new_instance_type = instance_types.get_instance_type(instance_type_id)
|
|
|
|
migration_ref = self.db.migration_create(context,
|
|
{'instance_uuid': instance_ref['uuid'],
|
|
'source_compute': instance_ref['host'],
|
|
'dest_compute': FLAGS.host,
|
|
'dest_host': self.driver.get_host_ip_addr(),
|
|
'old_instance_type_id': old_instance_type['id'],
|
|
'new_instance_type_id': instance_type_id,
|
|
'status': 'pre-migrating'})
|
|
|
|
LOG.audit(_('instance %s: migrating'), instance_ref['uuid'],
|
|
context=context)
|
|
topic = self.db.queue_get_for(context, FLAGS.compute_topic,
|
|
instance_ref['host'])
|
|
rpc.cast(context, topic,
|
|
{'method': 'resize_instance',
|
|
'args': {'instance_uuid': instance_ref['uuid'],
|
|
'migration_id': migration_ref['id']}})
|
|
|
|
usage_info = utils.usage_from_instance(instance_ref,
|
|
new_instance_type=new_instance_type['name'],
|
|
new_instance_type_id=new_instance_type['id'])
|
|
self._notify_about_instance_usage(instance_ref, "resize.prep.end",
|
|
usage_info=usage_info)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def resize_instance(self, context, instance_uuid, migration_id):
|
|
"""Starts the migration of a running instance to another host."""
|
|
migration_ref = self.db.migration_get(context, migration_id)
|
|
instance_ref = self.db.instance_get_by_uuid(context,
|
|
migration_ref.instance_uuid)
|
|
instance_type_ref = self.db.instance_type_get(context,
|
|
migration_ref.new_instance_type_id)
|
|
|
|
self.db.migration_update(context,
|
|
migration_id,
|
|
{'status': 'migrating'})
|
|
|
|
try:
|
|
disk_info = self.driver.migrate_disk_and_power_off(
|
|
context, instance_ref, migration_ref['dest_host'],
|
|
instance_type_ref)
|
|
except Exception, error:
|
|
with utils.save_and_reraise_exception():
|
|
msg = _('%s. Setting instance vm_state to ERROR')
|
|
LOG.error(msg % error)
|
|
self._instance_update(context,
|
|
instance_uuid,
|
|
vm_state=vm_states.ERROR)
|
|
|
|
self.db.migration_update(context,
|
|
migration_id,
|
|
{'status': 'post-migrating'})
|
|
|
|
service = self.db.service_get_by_host_and_topic(
|
|
context, migration_ref['dest_compute'], FLAGS.compute_topic)
|
|
topic = self.db.queue_get_for(context,
|
|
FLAGS.compute_topic,
|
|
migration_ref['dest_compute'])
|
|
params = {'migration_id': migration_id,
|
|
'disk_info': disk_info,
|
|
'instance_uuid': instance_ref['uuid']}
|
|
rpc.cast(context, topic, {'method': 'finish_resize',
|
|
'args': params})
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def finish_resize(self, context, instance_uuid, migration_id, disk_info):
|
|
"""Completes the migration process.
|
|
|
|
Sets up the newly transferred disk and turns on the instance at its
|
|
new host machine.
|
|
|
|
"""
|
|
migration_ref = self.db.migration_get(context, migration_id)
|
|
|
|
resize_instance = False
|
|
instance_ref = self.db.instance_get_by_uuid(context,
|
|
migration_ref.instance_uuid)
|
|
old_instance_type_id = migration_ref['old_instance_type_id']
|
|
new_instance_type_id = migration_ref['new_instance_type_id']
|
|
if old_instance_type_id != new_instance_type_id:
|
|
instance_type = instance_types.get_instance_type(
|
|
new_instance_type_id)
|
|
self.db.instance_update(context, instance_ref.uuid,
|
|
dict(instance_type_id=instance_type['id'],
|
|
memory_mb=instance_type['memory_mb'],
|
|
vcpus=instance_type['vcpus'],
|
|
root_gb=instance_type['root_gb'],
|
|
ephemeral_gb=instance_type['ephemeral_gb']))
|
|
resize_instance = True
|
|
|
|
instance_ref = self.db.instance_get_by_uuid(context,
|
|
instance_ref.uuid)
|
|
|
|
network_info = self._get_instance_nw_info(context, instance_ref)
|
|
|
|
# Have to look up image here since we depend on disk_format later
|
|
image_meta = _get_image_meta(context, instance_ref['image_ref'])
|
|
|
|
try:
|
|
self.driver.finish_migration(context, migration_ref, instance_ref,
|
|
disk_info,
|
|
self._legacy_nw_info(network_info),
|
|
image_meta, resize_instance)
|
|
except Exception, error:
|
|
with utils.save_and_reraise_exception():
|
|
msg = _('%s. Setting instance vm_state to ERROR')
|
|
LOG.error(msg % error)
|
|
self._instance_update(context,
|
|
instance_uuid,
|
|
vm_state=vm_states.ERROR)
|
|
|
|
self._instance_update(context,
|
|
instance_uuid,
|
|
vm_state=vm_states.ACTIVE,
|
|
host=migration_ref['dest_compute'],
|
|
task_state=task_states.RESIZE_VERIFY)
|
|
|
|
self.db.migration_update(context, migration_id,
|
|
{'status': 'finished', })
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def add_fixed_ip_to_instance(self, context, instance_uuid, network_id):
|
|
"""Calls network_api to add new fixed_ip to instance
|
|
then injects the new network info and resets instance networking.
|
|
|
|
"""
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
self._notify_about_instance_usage(instance_ref, "create_ip.start")
|
|
|
|
instance_id = instance_ref['id']
|
|
self.network_api.add_fixed_ip_to_instance(context, instance_id,
|
|
self.host, network_id)
|
|
|
|
network_info = self.inject_network_info(context,
|
|
instance_ref['uuid'])
|
|
self.reset_network(context, instance_ref['uuid'])
|
|
|
|
self._notify_about_instance_usage(instance_ref, "create_ip.end",
|
|
network_info=network_info)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def remove_fixed_ip_from_instance(self, context, instance_uuid, address):
|
|
"""Calls network_api to remove existing fixed_ip from instance
|
|
by injecting the altered network info and resetting
|
|
instance networking.
|
|
"""
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
self._notify_about_instance_usage(instance_ref, "delete_ip.start")
|
|
|
|
instance_id = instance_ref['id']
|
|
self.network_api.remove_fixed_ip_from_instance(context, instance_id,
|
|
address)
|
|
|
|
network_info = self.inject_network_info(context,
|
|
instance_ref['uuid'])
|
|
self.reset_network(context, instance_ref['uuid'])
|
|
|
|
self._notify_about_instance_usage(instance_ref, "delete_ip.end",
|
|
network_info=network_info)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def pause_instance(self, context, instance_uuid):
|
|
"""Pause an instance on this host."""
|
|
LOG.audit(_('instance %s: pausing'), instance_uuid, context=context)
|
|
context = context.elevated()
|
|
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
self.driver.pause(instance_ref)
|
|
|
|
current_power_state = self._get_power_state(context, instance_ref)
|
|
self._instance_update(context,
|
|
instance_ref['id'],
|
|
power_state=current_power_state,
|
|
vm_state=vm_states.PAUSED,
|
|
task_state=None)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def unpause_instance(self, context, instance_uuid):
|
|
"""Unpause a paused instance on this host."""
|
|
LOG.audit(_('instance %s: unpausing'), instance_uuid, context=context)
|
|
context = context.elevated()
|
|
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
self.driver.unpause(instance_ref)
|
|
|
|
current_power_state = self._get_power_state(context, instance_ref)
|
|
self._instance_update(context,
|
|
instance_ref['id'],
|
|
power_state=current_power_state,
|
|
vm_state=vm_states.ACTIVE,
|
|
task_state=None)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
def host_power_action(self, context, host=None, action=None):
|
|
"""Reboots, shuts down or powers up the host."""
|
|
return self.driver.host_power_action(host, action)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
def set_host_enabled(self, context, host=None, enabled=None):
|
|
"""Sets the specified host's ability to accept new instances."""
|
|
return self.driver.set_host_enabled(host, enabled)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@wrap_instance_fault
|
|
def get_diagnostics(self, context, instance_uuid):
|
|
"""Retrieve diagnostics for an instance on this host."""
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
if instance_ref["power_state"] == power_state.RUNNING:
|
|
LOG.audit(_("instance %s: retrieving diagnostics"), instance_uuid,
|
|
context=context)
|
|
return self.driver.get_diagnostics(instance_ref)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def suspend_instance(self, context, instance_uuid):
|
|
"""Suspend the given instance."""
|
|
LOG.audit(_('instance %s: suspending'), instance_uuid, context=context)
|
|
context = context.elevated()
|
|
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
self.driver.suspend(instance_ref)
|
|
|
|
current_power_state = self._get_power_state(context, instance_ref)
|
|
self._instance_update(context,
|
|
instance_ref['id'],
|
|
power_state=current_power_state,
|
|
vm_state=vm_states.SUSPENDED,
|
|
task_state=None)
|
|
|
|
usage_info = utils.usage_from_instance(instance_ref)
|
|
notifier.notify('compute.%s' % self.host, 'compute.instance.suspend',
|
|
notifier.INFO, usage_info)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def resume_instance(self, context, instance_uuid):
|
|
"""Resume the given suspended instance."""
|
|
LOG.audit(_('instance %s: resuming'), instance_uuid, context=context)
|
|
context = context.elevated()
|
|
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
self.driver.resume(instance_ref)
|
|
|
|
current_power_state = self._get_power_state(context, instance_ref)
|
|
self._instance_update(context,
|
|
instance_ref['id'],
|
|
power_state=current_power_state,
|
|
vm_state=vm_states.ACTIVE,
|
|
task_state=None)
|
|
|
|
usage_info = utils.usage_from_instance(instance_ref)
|
|
notifier.notify('compute.%s' % self.host, 'compute.instance.resume',
|
|
notifier.INFO, usage_info)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@wrap_instance_fault
|
|
def lock_instance(self, context, instance_uuid):
|
|
"""Lock the given instance."""
|
|
context = context.elevated()
|
|
|
|
LOG.debug(_('instance %s: locking'), instance_uuid, context=context)
|
|
self.db.instance_update(context, instance_uuid, {'locked': True})
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@wrap_instance_fault
|
|
def unlock_instance(self, context, instance_uuid):
|
|
"""Unlock the given instance."""
|
|
context = context.elevated()
|
|
|
|
LOG.debug(_('instance %s: unlocking'), instance_uuid, context=context)
|
|
self.db.instance_update(context, instance_uuid, {'locked': False})
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@wrap_instance_fault
|
|
def get_lock(self, context, instance_uuid):
|
|
"""Return the boolean state of the given instance's lock."""
|
|
context = context.elevated()
|
|
LOG.debug(_('instance %s: getting locked state'), instance_uuid,
|
|
context=context)
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
return instance_ref['locked']
|
|
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def reset_network(self, context, instance_uuid):
|
|
"""Reset networking on the given instance."""
|
|
instance = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
LOG.debug(_('instance %s: reset network'), instance_uuid,
|
|
context=context)
|
|
self.driver.reset_network(instance)
|
|
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def inject_network_info(self, context, instance_uuid):
|
|
"""Inject network info for the given instance."""
|
|
LOG.debug(_('instance %s: inject network info'), instance_uuid,
|
|
context=context)
|
|
instance = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
network_info = self._get_instance_nw_info(context, instance)
|
|
LOG.debug(_("network_info to inject: |%s|"), network_info)
|
|
|
|
self.driver.inject_network_info(instance,
|
|
self._legacy_nw_info(network_info))
|
|
return network_info
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@wrap_instance_fault
|
|
def get_console_output(self, context, instance_uuid, tail_length=None):
|
|
"""Send the console output for the given instance."""
|
|
context = context.elevated()
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
LOG.audit(_("Get console output for instance %s"), instance_uuid,
|
|
context=context)
|
|
output = self.driver.get_console_output(instance_ref)
|
|
|
|
if tail_length is not None:
|
|
output = self._tail_log(output, tail_length)
|
|
|
|
return output.decode('utf-8', 'replace').encode('ascii', 'replace')
|
|
|
|
def _tail_log(self, log, length):
|
|
try:
|
|
length = int(length)
|
|
except ValueError:
|
|
length = 0
|
|
|
|
if length == 0:
|
|
return ''
|
|
else:
|
|
return '\n'.join(log.split('\n')[-int(length):])
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@wrap_instance_fault
|
|
def get_ajax_console(self, context, instance_uuid):
|
|
"""Return connection information for an ajax console."""
|
|
context = context.elevated()
|
|
LOG.debug(_("instance %s: getting ajax console"), instance_uuid)
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
return self.driver.get_ajax_console(instance_ref)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@wrap_instance_fault
|
|
def get_vnc_console(self, context, instance_uuid, console_type):
|
|
"""Return connection information for a vnc console."""
|
|
context = context.elevated()
|
|
LOG.debug(_("instance %s: getting vnc console"), instance_uuid)
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
|
|
token = str(utils.gen_uuid())
|
|
|
|
if console_type == 'novnc':
|
|
# For essex, novncproxy_base_url must include the full path
|
|
# including the html file (like http://myhost/vnc_auto.html)
|
|
access_url = '%s?token=%s' % (FLAGS.novncproxy_base_url, token)
|
|
elif console_type == 'xvpvnc':
|
|
access_url = '%s?token=%s' % (FLAGS.xvpvncproxy_base_url, token)
|
|
else:
|
|
raise exception.ConsoleTypeInvalid(console_type=console_type)
|
|
|
|
# Retrieve connect info from driver, and then decorate with our
|
|
# access info token
|
|
connect_info = self.driver.get_vnc_console(instance_ref)
|
|
connect_info['token'] = token
|
|
connect_info['access_url'] = access_url
|
|
|
|
return connect_info
|
|
|
|
def _attach_volume_boot(self, context, instance, volume, mountpoint):
|
|
"""Attach a volume to an instance at boot time. So actual attach
|
|
is done by instance creation"""
|
|
|
|
instance_id = instance['id']
|
|
instance_uuid = instance['uuid']
|
|
volume_id = volume['id']
|
|
context = context.elevated()
|
|
msg = _("instance %(instance_uuid)s: booting with "
|
|
"volume %(volume_id)s at %(mountpoint)s")
|
|
LOG.audit(msg % locals(), context=context)
|
|
connector = self.driver.get_volume_connector(instance)
|
|
connection_info = self.volume_api.initialize_connection(context,
|
|
volume,
|
|
connector)
|
|
self.volume_api.attach(context, volume, instance_id, mountpoint)
|
|
return connection_info
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def attach_volume(self, context, instance_uuid, volume_id, mountpoint):
|
|
"""Attach a volume to an instance."""
|
|
volume = self.volume_api.get(context, volume_id)
|
|
context = context.elevated()
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
instance_id = instance_ref['id']
|
|
msg = _("instance %(instance_uuid)s: attaching volume %(volume_id)s"
|
|
" to %(mountpoint)s")
|
|
LOG.audit(msg % locals(), context=context)
|
|
connector = self.driver.get_volume_connector(instance_ref)
|
|
connection_info = self.volume_api.initialize_connection(context,
|
|
volume,
|
|
connector)
|
|
try:
|
|
self.driver.attach_volume(connection_info,
|
|
instance_ref['name'],
|
|
mountpoint)
|
|
except Exception: # pylint: disable=W0702
|
|
with utils.save_and_reraise_exception():
|
|
msg = _("instance %(instance_uuid)s: attach failed"
|
|
" %(mountpoint)s, removing")
|
|
LOG.exception(msg % locals(), context=context)
|
|
self.volume_api.terminate_connection(context,
|
|
volume,
|
|
connector)
|
|
|
|
self.volume_api.attach(context, volume, instance_id, mountpoint)
|
|
values = {
|
|
'instance_id': instance_id,
|
|
'connection_info': utils.dumps(connection_info),
|
|
'device_name': mountpoint,
|
|
'delete_on_termination': False,
|
|
'virtual_name': None,
|
|
'snapshot_id': None,
|
|
'volume_id': volume_id,
|
|
'volume_size': None,
|
|
'no_device': None}
|
|
self.db.block_device_mapping_create(context, values)
|
|
return True
|
|
|
|
def _detach_volume(self, context, instance, bdm):
|
|
"""Do the actual driver detach using block device mapping."""
|
|
instance_name = instance['name']
|
|
instance_uuid = instance['uuid']
|
|
mp = bdm['device_name']
|
|
volume_id = bdm['volume_id']
|
|
|
|
LOG.audit(_("Detach volume %(volume_id)s from mountpoint %(mp)s"
|
|
" on instance %(instance_uuid)s") % locals(), context=context)
|
|
|
|
if instance_name not in self.driver.list_instances():
|
|
LOG.warn(_("Detaching volume from unknown instance %s"),
|
|
instance_uuid, context=context)
|
|
self.driver.detach_volume(utils.loads(bdm['connection_info']),
|
|
instance_name,
|
|
mp)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
@checks_instance_lock
|
|
@wrap_instance_fault
|
|
def detach_volume(self, context, instance_uuid, volume_id):
|
|
"""Detach a volume from an instance."""
|
|
instance_ref = self.db.instance_get_by_uuid(context, instance_uuid)
|
|
instance_id = instance_ref['id']
|
|
bdm = self._get_instance_volume_bdm(context, instance_id, volume_id)
|
|
self._detach_volume(context, instance_ref, bdm)
|
|
volume = self.volume_api.get(context, volume_id)
|
|
connector = self.driver.get_volume_connector(instance_ref)
|
|
self.volume_api.terminate_connection(context, volume, connector)
|
|
self.volume_api.detach(context.elevated(), volume)
|
|
self.db.block_device_mapping_destroy_by_instance_and_volume(
|
|
context, instance_id, volume_id)
|
|
return True
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
def remove_volume_connection(self, context, instance_id, volume_id):
|
|
"""Remove a volume connection using the volume api"""
|
|
# NOTE(vish): We don't want to actually mark the volume
|
|
# detached, or delete the bdm, just remove the
|
|
# connection from this host.
|
|
try:
|
|
instance_ref = self.db.instance_get(context, instance_id)
|
|
bdm = self._get_instance_volume_bdm(context,
|
|
instance_id,
|
|
volume_id)
|
|
self._detach_volume(context, instance_ref, bdm)
|
|
volume = self.volume_api.get(context, volume_id)
|
|
connector = self.driver.get_volume_connector(instance_ref)
|
|
self.volume_api.terminate_connection(context, volume, connector)
|
|
except exception.NotFound:
|
|
pass
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
def compare_cpu(self, context, cpu_info):
|
|
"""Checks that the host cpu is compatible with a cpu given by xml.
|
|
|
|
:param context: security context
|
|
:param cpu_info: json string obtained from virConnect.getCapabilities
|
|
:returns: See driver.compare_cpu
|
|
|
|
"""
|
|
return self.driver.compare_cpu(cpu_info)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
def create_shared_storage_test_file(self, context):
|
|
"""Makes tmpfile under FLAGS.instance_path.
|
|
|
|
This method enables compute nodes to recognize that they mounts
|
|
same shared storage. (create|check|creanup)_shared_storage_test_file()
|
|
is a pair.
|
|
|
|
:param context: security context
|
|
:returns: tmpfile name(basename)
|
|
|
|
"""
|
|
dirpath = FLAGS.instances_path
|
|
fd, tmp_file = tempfile.mkstemp(dir=dirpath)
|
|
LOG.debug(_("Creating tmpfile %s to notify to other "
|
|
"compute nodes that they should mount "
|
|
"the same storage.") % tmp_file)
|
|
os.close(fd)
|
|
return os.path.basename(tmp_file)
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
def check_shared_storage_test_file(self, context, filename):
|
|
"""Confirms existence of the tmpfile under FLAGS.instances_path.
|
|
Cannot confirm tmpfile return False.
|
|
|
|
:param context: security context
|
|
:param filename: confirm existence of FLAGS.instances_path/thisfile
|
|
|
|
"""
|
|
tmp_file = os.path.join(FLAGS.instances_path, filename)
|
|
if not os.path.exists(tmp_file):
|
|
return False
|
|
else:
|
|
return True
|
|
|
|
@exception.wrap_exception(notifier=notifier, publisher_id=publisher_id())
|
|
def cleanup_shared_storage_test_file(self, context, filename):
|
|
"""Removes existence of the tmpfile under FLAGS.instances_path.
|
|
|
|
:param context: security context
|
|
:param filename: remove existence of FLAGS.instances_path/thisfile
|
|
|
|
"""
|
|
tmp_file = os.path.join(FLAGS.instances_path, filename)
|
|
os.remove(tmp_file)
|
|
|
|
def get_instance_disk_info(self, context, instance_name):
|
|
"""Getting infomation of instance's current disk.
|
|
|
|
Implementation nova.virt.libvirt.connection.
|
|
|
|
:param context: security context
|
|
:param instance_name: instance name
|
|
|
|
"""
|
|
return self.driver.get_instance_disk_info(instance_name)
|
|
|
|
def pre_live_migration(self, context, instance_id, time=None,
|
|
block_migration=False, disk=None):
|
|
"""Preparations for live migration at dest host.
|
|
|
|
:param context: security context
|
|
:param instance_id: nova.db.sqlalchemy.models.Instance.Id
|
|
:param block_migration: if true, prepare for block migration
|
|
|
|
"""
|
|
if not time:
|
|
time = greenthread
|
|
|
|
# Getting instance info
|
|
instance_ref = self.db.instance_get(context, instance_id)
|
|
|
|
# If any volume is mounted, prepare here.
|
|
block_device_info = \
|
|
self._get_instance_volume_block_device_info(context, instance_id)
|
|
if not block_device_info['block_device_mapping']:
|
|
LOG.info(_("%s has no volume."), instance_ref['uuid'])
|
|
|
|
self.driver.pre_live_migration(block_device_info)
|
|
|
|
# Bridge settings.
|
|
# Call this method prior to ensure_filtering_rules_for_instance,
|
|
# since bridge is not set up, ensure_filtering_rules_for instance
|
|
# fails.
|
|
#
|
|
# Retry operation is necessary because continuously request comes,
|
|
# concorrent request occurs to iptables, then it complains.
|
|
network_info = self._get_instance_nw_info(context, instance_ref)
|
|
|
|
# TODO(tr3buchet): figure out how on the earth this is necessary
|
|
fixed_ips = network_info.fixed_ips()
|
|
if not fixed_ips:
|
|
raise exception.FixedIpNotFoundForInstance(instance_id=instance_id)
|
|
|
|
max_retry = FLAGS.live_migration_retry_count
|
|
for cnt in range(max_retry):
|
|
try:
|
|
self.driver.plug_vifs(instance_ref,
|
|
self._legacy_nw_info(network_info))
|
|
break
|
|
except exception.ProcessExecutionError:
|
|
if cnt == max_retry - 1:
|
|
raise
|
|
else:
|
|
LOG.warn(_("plug_vifs() failed %(cnt)d."
|
|
"Retry up to %(max_retry)d for %(hostname)s.")
|
|
% locals())
|
|
time.sleep(1)
|
|
|
|
# Creating filters to hypervisors and firewalls.
|
|
# An example is that nova-instance-instance-xxx,
|
|
# which is written to libvirt.xml(Check "virsh nwfilter-list")
|
|
# This nwfilter is necessary on the destination host.
|
|
# In addition, this method is creating filtering rule
|
|
# onto destination host.
|
|
self.driver.ensure_filtering_rules_for_instance(instance_ref,
|
|
self._legacy_nw_info(network_info))
|
|
|
|
# Preparation for block migration
|
|
if block_migration:
|
|
self.driver.pre_block_migration(context,
|
|
instance_ref,
|
|
disk)
|
|
|
|
def live_migration(self, context, instance_id,
|
|
dest, block_migration=False):
|
|
"""Executing live migration.
|
|
|
|
:param context: security context
|
|
:param instance_id: nova.db.sqlalchemy.models.Instance.Id
|
|
:param dest: destination host
|
|
:param block_migration: if true, prepare for block migration
|
|
|
|
"""
|
|
# Get instance for error handling.
|
|
instance_ref = self.db.instance_get(context, instance_id)
|
|
|
|
try:
|
|
# Checking volume node is working correctly when any volumes
|
|
# are attached to instances.
|
|
if self._get_instance_volume_bdms(context, instance_id):
|
|
rpc.call(context,
|
|
FLAGS.volume_topic,
|
|
{"method": "check_for_export",
|
|
"args": {'instance_id': instance_id}})
|
|
|
|
if block_migration:
|
|
disk = self.driver.get_instance_disk_info(instance_ref.name)
|
|
else:
|
|
disk = None
|
|
|
|
rpc.call(context,
|
|
self.db.queue_get_for(context, FLAGS.compute_topic, dest),
|
|
{"method": "pre_live_migration",
|
|
"args": {'instance_id': instance_id,
|
|
'block_migration': block_migration,
|
|
'disk': disk}})
|
|
|
|
except Exception:
|
|
with utils.save_and_reraise_exception():
|
|
instance_uuid = instance_ref['uuid']
|
|
msg = _("Pre live migration for %(instance_uuid)s failed at"
|
|
" %(dest)s")
|
|
LOG.exception(msg % locals())
|
|
self.rollback_live_migration(context, instance_ref, dest,
|
|
block_migration)
|
|
|
|
# Executing live migration
|
|
# live_migration might raises exceptions, but
|
|
# nothing must be recovered in this version.
|
|
self.driver.live_migration(context, instance_ref, dest,
|
|
self.post_live_migration,
|
|
self.rollback_live_migration,
|
|
block_migration)
|
|
|
|
def post_live_migration(self, ctxt, instance_ref,
|
|
dest, block_migration=False):
|
|
"""Post operations for live migration.
|
|
|
|
This method is called from live_migration
|
|
and mainly updating database record.
|
|
|
|
:param ctxt: security context
|
|
:param instance_id: nova.db.sqlalchemy.models.Instance.Id
|
|
:param dest: destination host
|
|
:param block_migration: if true, prepare for block migration
|
|
|
|
"""
|
|
|
|
LOG.info(_('post_live_migration() is started..'))
|
|
instance_id = instance_ref['id']
|
|
instance_uuid = instance_ref['uuid']
|
|
|
|
# Detaching volumes.
|
|
for bdm in self._get_instance_volume_bdms(ctxt, instance_id):
|
|
# NOTE(vish): We don't want to actually mark the volume
|
|
# detached, or delete the bdm, just remove the
|
|
# connection from this host.
|
|
self.remove_volume_connection(ctxt, instance_id,
|
|
bdm['volume_id'])
|
|
|
|
# Releasing vlan.
|
|
# (not necessary in current implementation?)
|
|
|
|
network_info = self._get_instance_nw_info(ctxt, instance_ref)
|
|
# Releasing security group ingress rule.
|
|
self.driver.unfilter_instance(instance_ref,
|
|
self._legacy_nw_info(network_info))
|
|
|
|
# Database updating.
|
|
# NOTE(jkoelker) This needs to be converted to network api calls
|
|
# if nova wants to support floating_ips in
|
|
# quantum/melange
|
|
try:
|
|
# Not return if floating_ip is not found, otherwise,
|
|
# instance never be accessible..
|
|
floating_ip = self.db.instance_get_floating_address(ctxt,
|
|
instance_id)
|
|
if not floating_ip:
|
|
LOG.info(_('No floating_ip is found for %s.'), instance_uuid)
|
|
else:
|
|
floating_ip_ref = self.db.floating_ip_get_by_address(ctxt,
|
|
floating_ip)
|
|
self.db.floating_ip_update(ctxt,
|
|
floating_ip_ref['address'],
|
|
{'host': dest})
|
|
except exception.NotFound:
|
|
LOG.info(_('No floating_ip is found for %s.'), instance_uuid)
|
|
except Exception, e:
|
|
LOG.error(_("Live migration: Unexpected error: "
|
|
"%(instance_uuid)s cannot inherit floating "
|
|
"ip.\n%(e)s") % (locals()))
|
|
|
|
# Define domain at destination host, without doing it,
|
|
# pause/suspend/terminate do not work.
|
|
rpc.call(ctxt,
|
|
self.db.queue_get_for(ctxt, FLAGS.compute_topic, dest),
|
|
{"method": "post_live_migration_at_destination",
|
|
"args": {'instance_id': instance_ref['id'],
|
|
'block_migration': block_migration}})
|
|
|
|
# Restore instance state
|
|
current_power_state = self._get_power_state(ctxt, instance_ref)
|
|
self._instance_update(ctxt,
|
|
instance_ref["id"],
|
|
host=dest,
|
|
power_state=current_power_state,
|
|
vm_state=vm_states.ACTIVE,
|
|
task_state=None)
|
|
|
|
# Restore volume state
|
|
for volume_ref in instance_ref['volumes']:
|
|
self.volume_api.update(ctxt, volume_ref, {'status': 'in-use'})
|
|
|
|
# No instance booting at source host, but instance dir
|
|
# must be deleted for preparing next block migration
|
|
if block_migration:
|
|
self.driver.destroy(instance_ref,
|
|
self._legacy_nw_info(network_info))
|
|
else:
|
|
# self.driver.destroy() usually performs vif unplugging
|
|
# but we must do it explicitly here when block_migration
|
|
# is false, as the network devices at the source must be
|
|
# torn down
|
|
self.driver.unplug_vifs(instance_ref,
|
|
self._legacy_nw_info(network_info))
|
|
|
|
LOG.info(_('Migrating %(instance_uuid)s to %(dest)s finished'
|
|
' successfully.') % locals())
|
|
LOG.info(_("You may see the error \"libvirt: QEMU error: "
|
|
"Domain not found: no domain with matching name.\" "
|
|
"This error can be safely ignored."))
|
|
|
|
def post_live_migration_at_destination(self, context,
|
|
instance_id, block_migration=False):
|
|
"""Post operations for live migration .
|
|
|
|
:param context: security context
|
|
:param instance_id: nova.db.sqlalchemy.models.Instance.Id
|
|
:param block_migration: if true, prepare for block migration
|
|
|
|
"""
|
|
instance_ref = self.db.instance_get(context, instance_id)
|
|
LOG.info(_('Post operation of migraton started for %s .')
|
|
% instance_ref['uuid'])
|
|
network_info = self._get_instance_nw_info(context, instance_ref)
|
|
self.driver.post_live_migration_at_destination(context, instance_ref,
|
|
self._legacy_nw_info(network_info),
|
|
block_migration)
|
|
|
|
def rollback_live_migration(self, context, instance_ref,
|
|
dest, block_migration):
|
|
"""Recovers Instance/volume state from migrating -> running.
|
|
|
|
:param context: security context
|
|
:param instance_id: nova.db.sqlalchemy.models.Instance.Id
|
|
:param dest:
|
|
This method is called from live migration src host.
|
|
This param specifies destination host.
|
|
:param block_migration: if true, prepare for block migration
|
|
|
|
"""
|
|
host = instance_ref['host']
|
|
self._instance_update(context,
|
|
instance_ref['id'],
|
|
host=host,
|
|
vm_state=vm_states.ACTIVE,
|
|
task_state=None)
|
|
|
|
for bdm in self._get_instance_volume_bdms(context, instance_ref['id']):
|
|
volume_id = bdm['volume_id']
|
|
volume = self.volume_api.get(context, volume_id)
|
|
self.volume_api.update(context, volume, {'status': 'in-use'})
|
|
self.volume_api.remove_from_compute(context,
|
|
volume,
|
|
instance_ref['id'],
|
|
dest)
|
|
|
|
# Block migration needs empty image at destination host
|
|
# before migration starts, so if any failure occurs,
|
|
# any empty images has to be deleted.
|
|
if block_migration:
|
|
rpc.cast(context,
|
|
self.db.queue_get_for(context, FLAGS.compute_topic, dest),
|
|
{"method": "rollback_live_migration_at_destination",
|
|
"args": {'instance_id': instance_ref['id']}})
|
|
|
|
def rollback_live_migration_at_destination(self, context, instance_id):
|
|
""" Cleaning up image directory that is created pre_live_migration.
|
|
|
|
:param context: security context
|
|
:param instance_id: nova.db.sqlalchemy.models.Instance.Id
|
|
"""
|
|
instance_ref = self.db.instance_get(context, instance_id)
|
|
network_info = self._get_instance_nw_info(context, instance_ref)
|
|
|
|
# NOTE(vish): The mapping is passed in so the driver can disconnect
|
|
# from remote volumes if necessary
|
|
block_device_info = \
|
|
self._get_instance_volume_block_device_info(context, instance_id)
|
|
self.driver.destroy(instance_ref, self._legacy_nw_info(network_info),
|
|
block_device_info)
|
|
|
|
@manager.periodic_task
|
|
def _poll_rebooting_instances(self, context):
|
|
if FLAGS.reboot_timeout > 0:
|
|
self.driver.poll_rebooting_instances(FLAGS.reboot_timeout)
|
|
|
|
@manager.periodic_task
|
|
def _poll_rescued_instances(self, context):
|
|
if FLAGS.rescue_timeout > 0:
|
|
self.driver.poll_rescued_instances(FLAGS.rescue_timeout)
|
|
|
|
@manager.periodic_task
|
|
def _poll_unconfirmed_resizes(self, context):
|
|
if FLAGS.resize_confirm_window > 0:
|
|
self.driver.poll_unconfirmed_resizes(FLAGS.resize_confirm_window)
|
|
|
|
@manager.periodic_task
|
|
def _poll_bandwidth_usage(self, context, start_time=None, stop_time=None):
|
|
if not start_time:
|
|
start_time = utils.current_audit_period()[1]
|
|
|
|
curr_time = time.time()
|
|
if curr_time - self._last_bw_usage_poll > FLAGS.bandwith_poll_interval:
|
|
self._last_bw_usage_poll = curr_time
|
|
LOG.info(_("Updating bandwidth usage cache"))
|
|
|
|
try:
|
|
bw_usage = self.driver.get_all_bw_usage(start_time, stop_time)
|
|
except NotImplementedError:
|
|
# NOTE(mdragon): Not all hypervisors have bandwidth polling
|
|
# implemented yet. If they don't it doesn't break anything,
|
|
# they just don't get the info in the usage events.
|
|
return
|
|
|
|
for usage in bw_usage:
|
|
mac = usage['mac_address']
|
|
vif = self.network_api.get_vif_by_mac_address(context, mac)
|
|
if not vif:
|
|
continue
|
|
|
|
self.db.bw_usage_update(context,
|
|
vif['instance_id'],
|
|
mac,
|
|
start_time,
|
|
usage['bw_in'], usage['bw_out'])
|
|
|
|
@manager.periodic_task
|
|
def _report_driver_status(self, context):
|
|
curr_time = time.time()
|
|
if curr_time - self._last_host_check > FLAGS.host_state_interval:
|
|
self._last_host_check = curr_time
|
|
LOG.info(_("Updating host status"))
|
|
# This will grab info about the host and queue it
|
|
# to be sent to the Schedulers.
|
|
self.update_service_capabilities(
|
|
self.driver.get_host_stats(refresh=True))
|
|
|
|
@manager.periodic_task
|
|
def _sync_power_states(self, context):
|
|
"""Align power states between the database and the hypervisor.
|
|
|
|
The hypervisor is authoritative for the power_state data, so we
|
|
simply loop over all known instances for this host and update the
|
|
power_state according to the hypervisor. If the instance is not found
|
|
then it will be set to power_state.NOSTATE, because it doesn't exist
|
|
on the hypervisor.
|
|
|
|
"""
|
|
vm_instances = self.driver.list_instances_detail()
|
|
vm_instances = dict((vm.name, vm) for vm in vm_instances)
|
|
db_instances = self.db.instance_get_all_by_host(context, self.host)
|
|
|
|
num_vm_instances = len(vm_instances)
|
|
num_db_instances = len(db_instances)
|
|
|
|
if num_vm_instances != num_db_instances:
|
|
LOG.info(_("Found %(num_db_instances)s in the database and "
|
|
"%(num_vm_instances)s on the hypervisor.") % locals())
|
|
|
|
for db_instance in db_instances:
|
|
name = db_instance["name"]
|
|
db_power_state = db_instance['power_state']
|
|
vm_instance = vm_instances.get(name)
|
|
|
|
if vm_instance is None:
|
|
vm_power_state = power_state.NOSTATE
|
|
else:
|
|
vm_power_state = vm_instance.state
|
|
|
|
if vm_power_state == db_power_state:
|
|
continue
|
|
|
|
if (vm_power_state in (power_state.NOSTATE, power_state.SHUTOFF)
|
|
and db_instance['vm_state'] == vm_states.ACTIVE):
|
|
self._instance_update(context,
|
|
db_instance["id"],
|
|
power_state=vm_power_state,
|
|
vm_state=vm_states.SHUTOFF)
|
|
else:
|
|
self._instance_update(context,
|
|
db_instance["id"],
|
|
power_state=vm_power_state)
|
|
|
|
@manager.periodic_task
|
|
def _reclaim_queued_deletes(self, context):
|
|
"""Reclaim instances that are queued for deletion."""
|
|
if FLAGS.reclaim_instance_interval <= 0:
|
|
LOG.debug(_("FLAGS.reclaim_instance_interval <= 0, skipping..."))
|
|
return
|
|
|
|
instances = self.db.instance_get_all_by_host(context, self.host)
|
|
for instance in instances:
|
|
old_enough = (not instance.deleted_at or utils.is_older_than(
|
|
instance.deleted_at,
|
|
FLAGS.reclaim_instance_interval))
|
|
soft_deleted = instance.vm_state == vm_states.SOFT_DELETE
|
|
|
|
if soft_deleted and old_enough:
|
|
instance_uuid = instance['uuid']
|
|
LOG.info(_("Reclaiming deleted instance %(instance_uuid)s"),
|
|
locals())
|
|
self._delete_instance(context, instance)
|
|
|
|
@manager.periodic_task
|
|
def update_available_resource(self, context):
|
|
"""See driver.update_available_resource()
|
|
|
|
:param context: security context
|
|
:returns: See driver.update_available_resource()
|
|
|
|
"""
|
|
self.driver.update_available_resource(context, self.host)
|
|
|
|
def add_instance_fault_from_exc(self, context, instance_uuid, fault):
|
|
"""Adds the specified fault to the database."""
|
|
if hasattr(fault, "code"):
|
|
code = fault.code
|
|
else:
|
|
code = 500
|
|
|
|
values = {
|
|
'instance_uuid': instance_uuid,
|
|
'code': code,
|
|
'message': fault.__class__.__name__,
|
|
'details': fault.message,
|
|
}
|
|
self.db.instance_fault_create(context, values)
|
|
|
|
@manager.periodic_task(
|
|
ticks_between_runs=FLAGS.running_deleted_instance_poll_interval)
|
|
def _cleanup_running_deleted_instances(self, context):
|
|
"""Cleanup any instances which are erroneously still running after
|
|
having been deleted.
|
|
|
|
Valid actions to take are:
|
|
|
|
1. noop - do nothing
|
|
2. log - log which instances are erroneously running
|
|
3. reap - shutdown and cleanup any erroneously running instances
|
|
|
|
The use-case for this cleanup task is: for various reasons, it may be
|
|
possible for the database to show an instance as deleted but for that
|
|
instance to still be running on a host machine (see bug
|
|
https://bugs.launchpad.net/nova/+bug/911366).
|
|
|
|
This cleanup task is a cross-hypervisor utility for finding these
|
|
zombied instances and either logging the discrepancy (likely what you
|
|
should do in production), or automatically reaping the instances (more
|
|
appropriate for dev environments).
|
|
"""
|
|
action = FLAGS.running_deleted_instance_action
|
|
|
|
if action == "noop":
|
|
return
|
|
|
|
present_name_labels = set(self.driver.list_instances())
|
|
|
|
# NOTE(sirp): admin contexts don't ordinarily return deleted records
|
|
with utils.temporary_mutation(context, read_deleted="yes"):
|
|
instances = self.db.instance_get_all_by_host(context, self.host)
|
|
for instance in instances:
|
|
present = instance.name in present_name_labels
|
|
erroneously_running = instance.deleted and present
|
|
old_enough = (not instance.deleted_at or utils.is_older_than(
|
|
instance.deleted_at,
|
|
FLAGS.running_deleted_instance_timeout))
|
|
|
|
if erroneously_running and old_enough:
|
|
instance_id = instance['id']
|
|
instance_uuid = instance['uuid']
|
|
name_label = instance['name']
|
|
|
|
if action == "log":
|
|
LOG.warning(_("Detected instance %(instance_uuid)s"
|
|
" with name label '%(name_label)s' which"
|
|
" is marked as DELETED but still present"
|
|
" on host."), locals())
|
|
|
|
elif action == 'reap':
|
|
LOG.info(_("Destroying instance %(instance_uuid)s with"
|
|
" name label '%(name_label)s' which is"
|
|
" marked as DELETED but still present on"
|
|
" host."), locals())
|
|
self._shutdown_instance(
|
|
context, instance, 'Terminating', True)
|
|
self._cleanup_volumes(context, instance_id)
|
|
else:
|
|
raise Exception(_("Unrecognized value '%(action)s'"
|
|
" for FLAGS.running_deleted_"
|
|
"instance_action"), locals())
|
|
|
|
@contextlib.contextmanager
|
|
def error_out_instance_on_exception(self, context, instance_uuid):
|
|
try:
|
|
yield
|
|
except Exception, error:
|
|
with utils.save_and_reraise_exception():
|
|
msg = _('%s. Setting instance vm_state to ERROR')
|
|
LOG.error(msg % error)
|
|
self._set_instance_error_state(context, instance_uuid)
|
|
|
|
def add_aggregate_host(self, context, aggregate_id, host):
|
|
"""Adds a host to a physical hypervisor pool."""
|
|
raise NotImplementedError()
|
|
|
|
def remove_aggregate_host(self, context, aggregate_id, host):
|
|
"""Removes a host from a physical hypervisor pool."""
|
|
raise NotImplementedError()
|
|
|
|
@manager.periodic_task(
|
|
ticks_between_runs=FLAGS.image_cache_manager_interval)
|
|
def _run_image_cache_manager_pass(self, context):
|
|
"""Run a single pass of the image cache manager."""
|
|
|
|
if not FLAGS.use_image_cache_manager:
|
|
return
|
|
|
|
try:
|
|
self.driver.manage_image_cache(context)
|
|
except NotImplementedError:
|
|
pass
|