1191 lines
47 KiB
Python
1191 lines
47 KiB
Python
# Copyright (c) 2011 OpenStack Foundation
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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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"""Compute-related Utilities and helpers."""
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import contextlib
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import functools
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import inspect
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import itertools
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import math
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import string
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import traceback
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import netifaces
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from oslo_log import log
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from oslo_serialization import jsonutils
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import six
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from nova import block_device
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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 vm_states
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import nova.conf
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from nova import exception
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from nova import notifications
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from nova.notifications.objects import aggregate as aggregate_notification
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from nova.notifications.objects import base as notification_base
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from nova.notifications.objects import exception as notification_exception
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from nova.notifications.objects import flavor as flavor_notification
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from nova.notifications.objects import instance as instance_notification
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from nova.notifications.objects import keypair as keypair_notification
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from nova.notifications.objects import metrics as metrics_notification
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from nova.notifications.objects import server_group as sg_notification
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from nova import objects
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from nova.objects import fields
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from nova import rpc
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from nova import safe_utils
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from nova import utils
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from nova.virt import driver
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CONF = nova.conf.CONF
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LOG = log.getLogger(__name__)
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def exception_to_dict(fault, message=None):
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"""Converts exceptions to a dict for use in notifications.
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:param fault: Exception that occurred
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:param message: Optional fault message, otherwise the message is derived
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from the fault itself.
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:returns: dict with the following items:
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- exception: the fault itself
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- message: one of (in priority order):
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- the provided message to this method
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- a formatted NovaException message
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- the fault class name
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- code: integer code for the fault (defaults to 500)
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"""
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# TODO(johngarbutt) move to nova/exception.py to share with wrap_exception
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code = 500
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if hasattr(fault, "kwargs"):
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code = fault.kwargs.get('code', 500)
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# get the message from the exception that was thrown
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# if that does not exist, use the name of the exception class itself
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try:
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if not message:
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message = fault.format_message()
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# These exception handlers are broad so we don't fail to log the fault
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# just because there is an unexpected error retrieving the message
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except Exception:
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# In this case either we have a NovaException which failed to format
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# the message or we have a non-nova exception which could contain
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# sensitive details. Since we're not sure, be safe and set the message
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# to the exception class name. Note that we don't guard on
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# context.is_admin here because the message is always shown in the API,
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# even to non-admin users (e.g. NoValidHost) but only the traceback
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# details are shown to users with the admin role. Checking for admin
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# context here is also not helpful because admins can perform
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# operations on a tenant user's server (migrations, reboot, etc) and
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# service startup and periodic tasks could take actions on a server
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# and those use an admin context.
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message = fault.__class__.__name__
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# NOTE(dripton) The message field in the database is limited to 255 chars.
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# MySQL silently truncates overly long messages, but PostgreSQL throws an
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# error if we don't truncate it.
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u_message = utils.safe_truncate(message, 255)
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fault_dict = dict(exception=fault)
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fault_dict["message"] = u_message
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fault_dict["code"] = code
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return fault_dict
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def _get_fault_details(exc_info, error_code):
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details = ''
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# TODO(mriedem): Why do we only include the details if the code is 500?
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# Though for non-nova exceptions the code will probably be 500.
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if exc_info and error_code == 500:
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# We get the full exception details including the value since
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# the fault message may not contain that information for non-nova
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# exceptions (see exception_to_dict).
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details = ''.join(traceback.format_exception(
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exc_info[0], exc_info[1], exc_info[2]))
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return six.text_type(details)
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def add_instance_fault_from_exc(context, instance, fault, exc_info=None,
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fault_message=None):
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"""Adds the specified fault to the database."""
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fault_obj = objects.InstanceFault(context=context)
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fault_obj.host = CONF.host
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fault_obj.instance_uuid = instance.uuid
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fault_obj.update(exception_to_dict(fault, message=fault_message))
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code = fault_obj.code
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fault_obj.details = _get_fault_details(exc_info, code)
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fault_obj.create()
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def get_device_name_for_instance(instance, bdms, device):
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"""Validates (or generates) a device name for instance.
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This method is a wrapper for get_next_device_name that gets the list
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of used devices and the root device from a block device mapping.
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"""
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mappings = block_device.instance_block_mapping(instance, bdms)
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return get_next_device_name(instance, mappings.values(),
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mappings['root'], device)
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def default_device_names_for_instance(instance, root_device_name,
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*block_device_lists):
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"""Generate missing device names for an instance."""
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dev_list = [bdm.device_name
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for bdm in itertools.chain(*block_device_lists)
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if bdm.device_name]
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if root_device_name not in dev_list:
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dev_list.append(root_device_name)
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for bdm in itertools.chain(*block_device_lists):
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dev = bdm.device_name
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if not dev:
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dev = get_next_device_name(instance, dev_list,
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root_device_name)
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bdm.device_name = dev
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bdm.save()
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dev_list.append(dev)
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def get_next_device_name(instance, device_name_list,
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root_device_name=None, device=None):
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"""Validates (or generates) a device name for instance.
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If device is not set, it will generate a unique device appropriate
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for the instance. It uses the root_device_name (if provided) and
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the list of used devices to find valid device names. If the device
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name is valid but applicable to a different backend (for example
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/dev/vdc is specified but the backend uses /dev/xvdc), the device
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name will be converted to the appropriate format.
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"""
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req_prefix = None
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req_letter = None
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if device:
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try:
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req_prefix, req_letter = block_device.match_device(device)
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except (TypeError, AttributeError, ValueError):
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raise exception.InvalidDevicePath(path=device)
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if not root_device_name:
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root_device_name = block_device.DEFAULT_ROOT_DEV_NAME
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try:
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prefix = block_device.match_device(
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block_device.prepend_dev(root_device_name))[0]
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except (TypeError, AttributeError, ValueError):
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raise exception.InvalidDevicePath(path=root_device_name)
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# NOTE(vish): remove this when xenapi is setting default_root_device
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if driver.is_xenapi():
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prefix = '/dev/xvd'
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if req_prefix != prefix:
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LOG.debug("Using %(prefix)s instead of %(req_prefix)s",
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{'prefix': prefix, 'req_prefix': req_prefix})
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used_letters = set()
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for device_path in device_name_list:
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letter = block_device.get_device_letter(device_path)
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used_letters.add(letter)
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# NOTE(vish): remove this when xenapi is properly setting
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# default_ephemeral_device and default_swap_device
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if driver.is_xenapi():
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flavor = instance.get_flavor()
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if flavor.ephemeral_gb:
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used_letters.add('b')
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if flavor.swap:
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used_letters.add('c')
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if not req_letter:
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req_letter = _get_unused_letter(used_letters)
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if req_letter in used_letters:
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raise exception.DevicePathInUse(path=device)
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return prefix + req_letter
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def get_root_bdm(context, instance, bdms=None):
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if bdms is None:
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if isinstance(instance, objects.Instance):
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uuid = instance.uuid
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else:
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uuid = instance['uuid']
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bdms = objects.BlockDeviceMappingList.get_by_instance_uuid(
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context, uuid)
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return bdms.root_bdm()
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def is_volume_backed_instance(context, instance, bdms=None):
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root_bdm = get_root_bdm(context, instance, bdms)
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if root_bdm is not None:
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return root_bdm.is_volume
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# in case we hit a very old instance without root bdm, we _assume_ that
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# instance is backed by a volume, if and only if image_ref is not set
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if isinstance(instance, objects.Instance):
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return not instance.image_ref
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return not instance['image_ref']
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def heal_reqspec_is_bfv(ctxt, request_spec, instance):
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"""Calculates the is_bfv flag for a RequestSpec created before Rocky.
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Starting in Rocky, new instances have their RequestSpec created with
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the "is_bfv" flag to indicate if they are volume-backed which is used
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by the scheduler when determining root disk resource allocations.
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RequestSpecs created before Rocky will not have the is_bfv flag set
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so we need to calculate it here and update the RequestSpec.
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:param ctxt: nova.context.RequestContext auth context
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:param request_spec: nova.objects.RequestSpec used for scheduling
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:param instance: nova.objects.Instance being scheduled
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"""
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if 'is_bfv' in request_spec:
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return
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# Determine if this is a volume-backed instance and set the field
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# in the request spec accordingly.
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request_spec.is_bfv = is_volume_backed_instance(ctxt, instance)
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request_spec.save()
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def convert_mb_to_ceil_gb(mb_value):
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gb_int = 0
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if mb_value:
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gb_float = mb_value / 1024.0
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# ensure we reserve/allocate enough space by rounding up to nearest GB
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gb_int = int(math.ceil(gb_float))
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return gb_int
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def _get_unused_letter(used_letters):
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doubles = [first + second for second in string.ascii_lowercase
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for first in string.ascii_lowercase]
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all_letters = set(list(string.ascii_lowercase) + doubles)
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letters = list(all_letters - used_letters)
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# NOTE(vish): prepend ` so all shorter sequences sort first
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letters.sort(key=lambda x: x.rjust(2, '`'))
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return letters[0]
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def get_value_from_system_metadata(instance, key, type, default):
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"""Get a value of a specified type from image metadata.
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@param instance: The instance object
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@param key: The name of the property to get
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@param type: The python type the value is be returned as
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@param default: The value to return if key is not set or not the right type
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"""
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value = instance.system_metadata.get(key, default)
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try:
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return type(value)
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except ValueError:
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LOG.warning("Metadata value %(value)s for %(key)s is not of "
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"type %(type)s. Using default value %(default)s.",
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{'value': value, 'key': key, 'type': type,
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'default': default}, instance=instance)
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return default
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def notify_usage_exists(notifier, context, instance_ref, host,
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current_period=False, ignore_missing_network_data=True,
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system_metadata=None, extra_usage_info=None):
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"""Generates 'exists' unversioned legacy and transformed notification
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for an instance for usage auditing purposes.
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:param notifier: a messaging.Notifier
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:param context: request context for the current operation
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:param instance_ref: nova.objects.Instance object from which to report
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usage
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:param host: the host emitting the notification
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:param current_period: if True, this will generate a usage for the
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current usage period; if False, this will generate a usage for the
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previous audit period.
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:param ignore_missing_network_data: if True, log any exceptions generated
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while getting network info; if False, raise the exception.
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:param system_metadata: system_metadata override for the instance. If
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None, the instance_ref.system_metadata will be used.
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:param extra_usage_info: Dictionary containing extra values to add or
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override in the notification if not None.
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"""
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audit_start, audit_end = notifications.audit_period_bounds(current_period)
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bw = notifications.bandwidth_usage(context, instance_ref, audit_start,
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ignore_missing_network_data)
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if system_metadata is None:
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system_metadata = utils.instance_sys_meta(instance_ref)
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# add image metadata to the notification:
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image_meta = notifications.image_meta(system_metadata)
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extra_info = dict(audit_period_beginning=str(audit_start),
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audit_period_ending=str(audit_end),
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bandwidth=bw, image_meta=image_meta)
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if extra_usage_info:
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extra_info.update(extra_usage_info)
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notify_about_instance_usage(notifier, context, instance_ref, 'exists',
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extra_usage_info=extra_info)
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audit_period = instance_notification.AuditPeriodPayload(
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audit_period_beginning=audit_start,
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audit_period_ending=audit_end)
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bandwidth = [instance_notification.BandwidthPayload(
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network_name=label,
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in_bytes=b['bw_in'],
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out_bytes=b['bw_out'])
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for label, b in bw.items()]
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payload = instance_notification.InstanceExistsPayload(
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context=context,
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instance=instance_ref,
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audit_period=audit_period,
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bandwidth=bandwidth)
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notification = instance_notification.InstanceExistsNotification(
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context=context,
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priority=fields.NotificationPriority.INFO,
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publisher=notification_base.NotificationPublisher(
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host=host, source=fields.NotificationSource.COMPUTE),
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event_type=notification_base.EventType(
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object='instance',
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action=fields.NotificationAction.EXISTS),
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payload=payload)
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notification.emit(context)
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def notify_about_instance_usage(notifier, context, instance, event_suffix,
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network_info=None, extra_usage_info=None,
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fault=None):
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"""Send an unversioned legacy notification about an instance.
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All new notifications should use notify_about_instance_action which sends
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a versioned notification.
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:param notifier: a messaging.Notifier
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:param event_suffix: Event type like "delete.start" or "exists"
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:param network_info: Networking information, if provided.
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:param extra_usage_info: Dictionary containing extra values to add or
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override in the notification.
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"""
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if not extra_usage_info:
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extra_usage_info = {}
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usage_info = notifications.info_from_instance(context, instance,
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network_info, populate_image_ref_url=True, **extra_usage_info)
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if fault:
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# NOTE(johngarbutt) mirrors the format in wrap_exception
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fault_payload = exception_to_dict(fault)
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LOG.debug(fault_payload["message"], instance=instance)
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usage_info.update(fault_payload)
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if event_suffix.endswith("error"):
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method = notifier.error
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else:
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method = notifier.info
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method(context, 'compute.instance.%s' % event_suffix, usage_info)
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def _get_fault_and_priority_from_exc_and_tb(exception, tb):
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fault = None
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priority = fields.NotificationPriority.INFO
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if exception:
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priority = fields.NotificationPriority.ERROR
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fault = notification_exception.ExceptionPayload.from_exc_and_traceback(
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exception, tb)
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return fault, priority
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@rpc.if_notifications_enabled
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def notify_about_instance_action(context, instance, host, action, phase=None,
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source=fields.NotificationSource.COMPUTE,
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exception=None, bdms=None, tb=None):
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"""Send versioned notification about the action made on the instance
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:param instance: the instance which the action performed on
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:param host: the host emitting the notification
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:param action: the name of the action
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:param phase: the phase of the action
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:param source: the source of the notification
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:param exception: the thrown exception (used in error notifications)
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:param bdms: BlockDeviceMappingList object for the instance. If it is not
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provided then we will load it from the db if so configured
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:param tb: the traceback (used in error notifications)
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"""
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fault, priority = _get_fault_and_priority_from_exc_and_tb(exception, tb)
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payload = instance_notification.InstanceActionPayload(
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context=context,
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instance=instance,
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fault=fault,
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bdms=bdms)
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notification = instance_notification.InstanceActionNotification(
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context=context,
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priority=priority,
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publisher=notification_base.NotificationPublisher(
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host=host, source=source),
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event_type=notification_base.EventType(
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object='instance',
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action=action,
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phase=phase),
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payload=payload)
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notification.emit(context)
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@rpc.if_notifications_enabled
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def notify_about_instance_create(context, instance, host, phase=None,
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exception=None, bdms=None, tb=None):
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"""Send versioned notification about instance creation
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:param context: the request context
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:param instance: the instance being created
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:param host: the host emitting the notification
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:param phase: the phase of the creation
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:param exception: the thrown exception (used in error notifications)
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:param bdms: BlockDeviceMappingList object for the instance. If it is not
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provided then we will load it from the db if so configured
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:param tb: the traceback (used in error notifications)
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"""
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fault, priority = _get_fault_and_priority_from_exc_and_tb(exception, tb)
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payload = instance_notification.InstanceCreatePayload(
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context=context,
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instance=instance,
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fault=fault,
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bdms=bdms)
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notification = instance_notification.InstanceCreateNotification(
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context=context,
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priority=priority,
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publisher=notification_base.NotificationPublisher(
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host=host, source=fields.NotificationSource.COMPUTE),
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event_type=notification_base.EventType(
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object='instance',
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action=fields.NotificationAction.CREATE,
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phase=phase),
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payload=payload)
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notification.emit(context)
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@rpc.if_notifications_enabled
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def notify_about_volume_attach_detach(context, instance, host, action, phase,
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volume_id=None, exception=None, tb=None):
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"""Send versioned notification about the action made on the instance
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:param instance: the instance which the action performed on
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:param host: the host emitting the notification
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:param action: the name of the action
|
|
:param phase: the phase of the action
|
|
:param volume_id: id of the volume will be attached
|
|
:param exception: the thrown exception (used in error notifications)
|
|
:param tb: the traceback (used in error notifications)
|
|
"""
|
|
fault, priority = _get_fault_and_priority_from_exc_and_tb(exception, tb)
|
|
payload = instance_notification.InstanceActionVolumePayload(
|
|
context=context,
|
|
instance=instance,
|
|
fault=fault,
|
|
volume_id=volume_id)
|
|
notification = instance_notification.InstanceActionVolumeNotification(
|
|
context=context,
|
|
priority=priority,
|
|
publisher=notification_base.NotificationPublisher(
|
|
host=host, source=fields.NotificationSource.COMPUTE),
|
|
event_type=notification_base.EventType(
|
|
object='instance',
|
|
action=action,
|
|
phase=phase),
|
|
payload=payload)
|
|
notification.emit(context)
|
|
|
|
|
|
@rpc.if_notifications_enabled
|
|
def notify_about_instance_rescue_action(context, instance, host,
|
|
rescue_image_ref, phase=None,
|
|
exception=None, tb=None):
|
|
"""Send versioned notification about the action made on the instance
|
|
|
|
:param instance: the instance which the action performed on
|
|
:param host: the host emitting the notification
|
|
:param rescue_image_ref: the rescue image ref
|
|
:param phase: the phase of the action
|
|
:param exception: the thrown exception (used in error notifications)
|
|
:param tb: the traceback (used in error notifications)
|
|
"""
|
|
fault, priority = _get_fault_and_priority_from_exc_and_tb(exception, tb)
|
|
payload = instance_notification.InstanceActionRescuePayload(
|
|
context=context,
|
|
instance=instance,
|
|
fault=fault,
|
|
rescue_image_ref=rescue_image_ref)
|
|
|
|
notification = instance_notification.InstanceActionRescueNotification(
|
|
context=context,
|
|
priority=priority,
|
|
publisher=notification_base.NotificationPublisher(
|
|
host=host, source=fields.NotificationSource.COMPUTE),
|
|
event_type=notification_base.EventType(
|
|
object='instance',
|
|
action=fields.NotificationAction.RESCUE,
|
|
phase=phase),
|
|
payload=payload)
|
|
notification.emit(context)
|
|
|
|
|
|
@rpc.if_notifications_enabled
|
|
def notify_about_keypair_action(context, keypair, action, phase):
|
|
"""Send versioned notification about the keypair action on the instance
|
|
|
|
:param context: the request context
|
|
:param keypair: the keypair which the action performed on
|
|
:param action: the name of the action
|
|
:param phase: the phase of the action
|
|
"""
|
|
payload = keypair_notification.KeypairPayload(keypair=keypair)
|
|
notification = keypair_notification.KeypairNotification(
|
|
priority=fields.NotificationPriority.INFO,
|
|
publisher=notification_base.NotificationPublisher(
|
|
host=CONF.host, source=fields.NotificationSource.API),
|
|
event_type=notification_base.EventType(
|
|
object='keypair',
|
|
action=action,
|
|
phase=phase),
|
|
payload=payload)
|
|
notification.emit(context)
|
|
|
|
|
|
@rpc.if_notifications_enabled
|
|
def notify_about_volume_swap(context, instance, host, phase,
|
|
old_volume_id, new_volume_id, exception=None,
|
|
tb=None):
|
|
"""Send versioned notification about the volume swap action
|
|
on the instance
|
|
|
|
:param context: the request context
|
|
:param instance: the instance which the action performed on
|
|
:param host: the host emitting the notification
|
|
:param phase: the phase of the action
|
|
:param old_volume_id: the ID of the volume that is copied from and detached
|
|
:param new_volume_id: the ID of the volume that is copied to and attached
|
|
:param exception: an exception
|
|
:param tb: the traceback (used in error notifications)
|
|
"""
|
|
fault, priority = _get_fault_and_priority_from_exc_and_tb(exception, tb)
|
|
payload = instance_notification.InstanceActionVolumeSwapPayload(
|
|
context=context,
|
|
instance=instance,
|
|
fault=fault,
|
|
old_volume_id=old_volume_id,
|
|
new_volume_id=new_volume_id)
|
|
|
|
instance_notification.InstanceActionVolumeSwapNotification(
|
|
context=context,
|
|
priority=priority,
|
|
publisher=notification_base.NotificationPublisher(
|
|
host=host, source=fields.NotificationSource.COMPUTE),
|
|
event_type=notification_base.EventType(
|
|
object='instance',
|
|
action=fields.NotificationAction.VOLUME_SWAP,
|
|
phase=phase),
|
|
payload=payload).emit(context)
|
|
|
|
|
|
@rpc.if_notifications_enabled
|
|
def notify_about_instance_snapshot(context, instance, host, phase,
|
|
snapshot_image_id):
|
|
"""Send versioned notification about the snapshot action executed on the
|
|
instance
|
|
|
|
:param context: the request context
|
|
:param instance: the instance from which a snapshot image is being created
|
|
:param host: the host emitting the notification
|
|
:param phase: the phase of the action
|
|
:param snapshot_image_id: the ID of the snapshot
|
|
"""
|
|
payload = instance_notification.InstanceActionSnapshotPayload(
|
|
context=context,
|
|
instance=instance,
|
|
fault=None,
|
|
snapshot_image_id=snapshot_image_id)
|
|
|
|
instance_notification.InstanceActionSnapshotNotification(
|
|
context=context,
|
|
priority=fields.NotificationPriority.INFO,
|
|
publisher=notification_base.NotificationPublisher(
|
|
host=host, source=fields.NotificationSource.COMPUTE),
|
|
event_type=notification_base.EventType(
|
|
object='instance',
|
|
action=fields.NotificationAction.SNAPSHOT,
|
|
phase=phase),
|
|
payload=payload).emit(context)
|
|
|
|
|
|
@rpc.if_notifications_enabled
|
|
def notify_about_resize_prep_instance(context, instance, host, phase,
|
|
new_flavor):
|
|
"""Send versioned notification about the instance resize action
|
|
on the instance
|
|
|
|
:param context: the request context
|
|
:param instance: the instance which the resize action performed on
|
|
:param host: the host emitting the notification
|
|
:param phase: the phase of the action
|
|
:param new_flavor: new flavor
|
|
"""
|
|
|
|
payload = instance_notification.InstanceActionResizePrepPayload(
|
|
context=context,
|
|
instance=instance,
|
|
fault=None,
|
|
new_flavor=flavor_notification.FlavorPayload(flavor=new_flavor))
|
|
|
|
instance_notification.InstanceActionResizePrepNotification(
|
|
context=context,
|
|
priority=fields.NotificationPriority.INFO,
|
|
publisher=notification_base.NotificationPublisher(
|
|
host=host, source=fields.NotificationSource.COMPUTE),
|
|
event_type=notification_base.EventType(
|
|
object='instance',
|
|
action=fields.NotificationAction.RESIZE_PREP,
|
|
phase=phase),
|
|
payload=payload).emit(context)
|
|
|
|
|
|
def notify_about_server_group_update(context, event_suffix, sg_payload):
|
|
"""Send a notification about server group update.
|
|
|
|
:param event_suffix: Event type like "create.start" or "create.end"
|
|
:param sg_payload: payload for server group update
|
|
"""
|
|
notifier = rpc.get_notifier(service='servergroup')
|
|
|
|
notifier.info(context, 'servergroup.%s' % event_suffix, sg_payload)
|
|
|
|
|
|
def notify_about_aggregate_update(context, event_suffix, aggregate_payload):
|
|
"""Send a notification about aggregate update.
|
|
|
|
:param event_suffix: Event type like "create.start" or "create.end"
|
|
:param aggregate_payload: payload for aggregate update
|
|
"""
|
|
aggregate_identifier = aggregate_payload.get('aggregate_id', None)
|
|
if not aggregate_identifier:
|
|
aggregate_identifier = aggregate_payload.get('name', None)
|
|
if not aggregate_identifier:
|
|
LOG.debug("No aggregate id or name specified for this "
|
|
"notification and it will be ignored")
|
|
return
|
|
|
|
notifier = rpc.get_notifier(service='aggregate',
|
|
host=aggregate_identifier)
|
|
|
|
notifier.info(context, 'aggregate.%s' % event_suffix, aggregate_payload)
|
|
|
|
|
|
@rpc.if_notifications_enabled
|
|
def notify_about_aggregate_action(context, aggregate, action, phase):
|
|
payload = aggregate_notification.AggregatePayload(aggregate)
|
|
notification = aggregate_notification.AggregateNotification(
|
|
priority=fields.NotificationPriority.INFO,
|
|
publisher=notification_base.NotificationPublisher(
|
|
host=CONF.host, source=fields.NotificationSource.API),
|
|
event_type=notification_base.EventType(
|
|
object='aggregate',
|
|
action=action,
|
|
phase=phase),
|
|
payload=payload)
|
|
notification.emit(context)
|
|
|
|
|
|
def notify_about_host_update(context, event_suffix, host_payload):
|
|
"""Send a notification about host update.
|
|
|
|
:param event_suffix: Event type like "create.start" or "create.end"
|
|
:param host_payload: payload for host update. It is a dict and there
|
|
should be at least the 'host_name' key in this
|
|
dict.
|
|
"""
|
|
host_identifier = host_payload.get('host_name')
|
|
if not host_identifier:
|
|
LOG.warning("No host name specified for the notification of "
|
|
"HostAPI.%s and it will be ignored", event_suffix)
|
|
return
|
|
|
|
notifier = rpc.get_notifier(service='api', host=host_identifier)
|
|
|
|
notifier.info(context, 'HostAPI.%s' % event_suffix, host_payload)
|
|
|
|
|
|
@rpc.if_notifications_enabled
|
|
def notify_about_server_group_action(context, group, action):
|
|
payload = sg_notification.ServerGroupPayload(group)
|
|
notification = sg_notification.ServerGroupNotification(
|
|
priority=fields.NotificationPriority.INFO,
|
|
publisher=notification_base.NotificationPublisher(
|
|
host=CONF.host, source=fields.NotificationSource.API),
|
|
event_type=notification_base.EventType(
|
|
object='server_group',
|
|
action=action),
|
|
payload=payload)
|
|
notification.emit(context)
|
|
|
|
|
|
@rpc.if_notifications_enabled
|
|
def notify_about_server_group_add_member(context, group_id):
|
|
group = objects.InstanceGroup.get_by_uuid(context, group_id)
|
|
payload = sg_notification.ServerGroupPayload(group)
|
|
notification = sg_notification.ServerGroupNotification(
|
|
priority=fields.NotificationPriority.INFO,
|
|
publisher=notification_base.NotificationPublisher(
|
|
host=CONF.host, source=fields.NotificationSource.API),
|
|
event_type=notification_base.EventType(
|
|
object='server_group',
|
|
action=fields.NotificationAction.ADD_MEMBER),
|
|
payload=payload)
|
|
notification.emit(context)
|
|
|
|
|
|
@rpc.if_notifications_enabled
|
|
def notify_about_instance_rebuild(context, instance, host,
|
|
action=fields.NotificationAction.REBUILD,
|
|
phase=None,
|
|
source=fields.NotificationSource.COMPUTE,
|
|
exception=None, bdms=None, tb=None):
|
|
"""Send versioned notification about instance rebuild
|
|
|
|
:param instance: the instance which the action performed on
|
|
:param host: the host emitting the notification
|
|
:param action: the name of the action
|
|
:param phase: the phase of the action
|
|
:param source: the source of the notification
|
|
:param exception: the thrown exception (used in error notifications)
|
|
:param bdms: BlockDeviceMappingList object for the instance. If it is not
|
|
provided then we will load it from the db if so configured
|
|
:param tb: the traceback (used in error notifications)
|
|
"""
|
|
fault, priority = _get_fault_and_priority_from_exc_and_tb(exception, tb)
|
|
payload = instance_notification.InstanceActionRebuildPayload(
|
|
context=context,
|
|
instance=instance,
|
|
fault=fault,
|
|
bdms=bdms)
|
|
notification = instance_notification.InstanceActionRebuildNotification(
|
|
context=context,
|
|
priority=priority,
|
|
publisher=notification_base.NotificationPublisher(
|
|
host=host, source=source),
|
|
event_type=notification_base.EventType(
|
|
object='instance',
|
|
action=action,
|
|
phase=phase),
|
|
payload=payload)
|
|
notification.emit(context)
|
|
|
|
|
|
@rpc.if_notifications_enabled
|
|
def notify_about_metrics_update(context, host, host_ip, nodename,
|
|
monitor_metric_list):
|
|
"""Send versioned notification about updating metrics
|
|
|
|
:param context: the request context
|
|
:param host: the host emitting the notification
|
|
:param host_ip: the IP address of the host
|
|
:param nodename: the node name
|
|
:param monitor_metric_list: the MonitorMetricList object
|
|
"""
|
|
payload = metrics_notification.MetricsPayload(
|
|
host=host,
|
|
host_ip=host_ip,
|
|
nodename=nodename,
|
|
monitor_metric_list=monitor_metric_list)
|
|
notification = metrics_notification.MetricsNotification(
|
|
context=context,
|
|
priority=fields.NotificationPriority.INFO,
|
|
publisher=notification_base.NotificationPublisher(
|
|
host=host, source=fields.NotificationSource.COMPUTE),
|
|
event_type=notification_base.EventType(
|
|
object='metrics',
|
|
action=fields.NotificationAction.UPDATE),
|
|
payload=payload)
|
|
notification.emit(context)
|
|
|
|
|
|
def refresh_info_cache_for_instance(context, instance):
|
|
"""Refresh the info cache for an instance.
|
|
|
|
:param instance: The instance object.
|
|
"""
|
|
if instance.info_cache is not None and not instance.deleted:
|
|
# Catch the exception in case the instance got deleted after the check
|
|
# instance.deleted was executed
|
|
try:
|
|
instance.info_cache.refresh()
|
|
except exception.InstanceInfoCacheNotFound:
|
|
LOG.debug("Can not refresh info_cache because instance "
|
|
"was not found", instance=instance)
|
|
|
|
|
|
def usage_volume_info(vol_usage):
|
|
def null_safe_str(s):
|
|
return str(s) if s else ''
|
|
|
|
tot_refreshed = vol_usage.tot_last_refreshed
|
|
curr_refreshed = vol_usage.curr_last_refreshed
|
|
if tot_refreshed and curr_refreshed:
|
|
last_refreshed_time = max(tot_refreshed, curr_refreshed)
|
|
elif tot_refreshed:
|
|
last_refreshed_time = tot_refreshed
|
|
else:
|
|
# curr_refreshed must be set
|
|
last_refreshed_time = curr_refreshed
|
|
|
|
usage_info = dict(
|
|
volume_id=vol_usage.volume_id,
|
|
tenant_id=vol_usage.project_id,
|
|
user_id=vol_usage.user_id,
|
|
availability_zone=vol_usage.availability_zone,
|
|
instance_id=vol_usage.instance_uuid,
|
|
last_refreshed=null_safe_str(last_refreshed_time),
|
|
reads=vol_usage.tot_reads + vol_usage.curr_reads,
|
|
read_bytes=vol_usage.tot_read_bytes +
|
|
vol_usage.curr_read_bytes,
|
|
writes=vol_usage.tot_writes + vol_usage.curr_writes,
|
|
write_bytes=vol_usage.tot_write_bytes +
|
|
vol_usage.curr_write_bytes)
|
|
|
|
return usage_info
|
|
|
|
|
|
def get_reboot_type(task_state, current_power_state):
|
|
"""Checks if the current instance state requires a HARD reboot."""
|
|
if current_power_state != power_state.RUNNING:
|
|
return 'HARD'
|
|
if task_state in task_states.soft_reboot_states:
|
|
return 'SOFT'
|
|
return 'HARD'
|
|
|
|
|
|
def get_machine_ips():
|
|
"""Get the machine's ip addresses
|
|
|
|
:returns: list of Strings of ip addresses
|
|
"""
|
|
addresses = []
|
|
for interface in netifaces.interfaces():
|
|
try:
|
|
iface_data = netifaces.ifaddresses(interface)
|
|
for family in iface_data:
|
|
if family not in (netifaces.AF_INET, netifaces.AF_INET6):
|
|
continue
|
|
for address in iface_data[family]:
|
|
addr = address['addr']
|
|
|
|
# If we have an ipv6 address remove the
|
|
# %ether_interface at the end
|
|
if family == netifaces.AF_INET6:
|
|
addr = addr.split('%')[0]
|
|
addresses.append(addr)
|
|
except ValueError:
|
|
pass
|
|
return addresses
|
|
|
|
|
|
def upsize_quota_delta(new_flavor, old_flavor):
|
|
"""Calculate deltas required to adjust quota for an instance upsize.
|
|
|
|
:param new_flavor: the target instance type
|
|
:param old_flavor: the original instance type
|
|
"""
|
|
def _quota_delta(resource):
|
|
return (new_flavor[resource] - old_flavor[resource])
|
|
|
|
deltas = {}
|
|
if _quota_delta('vcpus') > 0:
|
|
deltas['cores'] = _quota_delta('vcpus')
|
|
if _quota_delta('memory_mb') > 0:
|
|
deltas['ram'] = _quota_delta('memory_mb')
|
|
|
|
return deltas
|
|
|
|
|
|
def get_headroom(quotas, usages, deltas):
|
|
headroom = {res: quotas[res] - usages[res]
|
|
for res in quotas.keys()}
|
|
# If quota_cores is unlimited [-1]:
|
|
# - set cores headroom based on instances headroom:
|
|
if quotas.get('cores') == -1:
|
|
if deltas.get('cores'):
|
|
hc = headroom.get('instances', 1) * deltas['cores']
|
|
headroom['cores'] = hc / deltas.get('instances', 1)
|
|
else:
|
|
headroom['cores'] = headroom.get('instances', 1)
|
|
|
|
# If quota_ram is unlimited [-1]:
|
|
# - set ram headroom based on instances headroom:
|
|
if quotas.get('ram') == -1:
|
|
if deltas.get('ram'):
|
|
hr = headroom.get('instances', 1) * deltas['ram']
|
|
headroom['ram'] = hr / deltas.get('instances', 1)
|
|
else:
|
|
headroom['ram'] = headroom.get('instances', 1)
|
|
|
|
return headroom
|
|
|
|
|
|
def check_num_instances_quota(context, instance_type, min_count,
|
|
max_count, project_id=None, user_id=None,
|
|
orig_num_req=None):
|
|
"""Enforce quota limits on number of instances created."""
|
|
# project_id is used for the TooManyInstances error message
|
|
if project_id is None:
|
|
project_id = context.project_id
|
|
# Determine requested cores and ram
|
|
req_cores = max_count * instance_type.vcpus
|
|
req_ram = max_count * instance_type.memory_mb
|
|
deltas = {'instances': max_count, 'cores': req_cores, 'ram': req_ram}
|
|
|
|
try:
|
|
objects.Quotas.check_deltas(context, deltas,
|
|
project_id, user_id=user_id,
|
|
check_project_id=project_id,
|
|
check_user_id=user_id)
|
|
except exception.OverQuota as exc:
|
|
quotas = exc.kwargs['quotas']
|
|
overs = exc.kwargs['overs']
|
|
usages = exc.kwargs['usages']
|
|
# This is for the recheck quota case where we used a delta of zero.
|
|
if min_count == max_count == 0:
|
|
# orig_num_req is the original number of instances requested in the
|
|
# case of a recheck quota, for use in the over quota exception.
|
|
req_cores = orig_num_req * instance_type.vcpus
|
|
req_ram = orig_num_req * instance_type.memory_mb
|
|
requested = {'instances': orig_num_req, 'cores': req_cores,
|
|
'ram': req_ram}
|
|
(overs, reqs, total_alloweds, useds) = get_over_quota_detail(
|
|
deltas, overs, quotas, requested)
|
|
msg = "Cannot run any more instances of this type."
|
|
params = {'overs': overs, 'pid': project_id, 'msg': msg}
|
|
LOG.debug("%(overs)s quota exceeded for %(pid)s. %(msg)s",
|
|
params)
|
|
raise exception.TooManyInstances(overs=overs,
|
|
req=reqs,
|
|
used=useds,
|
|
allowed=total_alloweds)
|
|
# OK, we exceeded quota; let's figure out why...
|
|
headroom = get_headroom(quotas, usages, deltas)
|
|
|
|
allowed = headroom.get('instances', 1)
|
|
# Reduce 'allowed' instances in line with the cores & ram headroom
|
|
if instance_type.vcpus:
|
|
allowed = min(allowed,
|
|
headroom['cores'] // instance_type.vcpus)
|
|
if instance_type.memory_mb:
|
|
allowed = min(allowed,
|
|
headroom['ram'] // instance_type.memory_mb)
|
|
|
|
# Convert to the appropriate exception message
|
|
if allowed <= 0:
|
|
msg = "Cannot run any more instances of this type."
|
|
elif min_count <= allowed <= max_count:
|
|
# We're actually OK, but still need to check against allowed
|
|
return check_num_instances_quota(context, instance_type, min_count,
|
|
allowed, project_id=project_id,
|
|
user_id=user_id)
|
|
else:
|
|
msg = "Can only run %s more instances of this type." % allowed
|
|
|
|
num_instances = (str(min_count) if min_count == max_count else
|
|
"%s-%s" % (min_count, max_count))
|
|
requested = dict(instances=num_instances, cores=req_cores,
|
|
ram=req_ram)
|
|
(overs, reqs, total_alloweds, useds) = get_over_quota_detail(
|
|
headroom, overs, quotas, requested)
|
|
params = {'overs': overs, 'pid': project_id,
|
|
'min_count': min_count, 'max_count': max_count,
|
|
'msg': msg}
|
|
|
|
if min_count == max_count:
|
|
LOG.debug("%(overs)s quota exceeded for %(pid)s,"
|
|
" tried to run %(min_count)d instances. "
|
|
"%(msg)s", params)
|
|
else:
|
|
LOG.debug("%(overs)s quota exceeded for %(pid)s,"
|
|
" tried to run between %(min_count)d and"
|
|
" %(max_count)d instances. %(msg)s",
|
|
params)
|
|
raise exception.TooManyInstances(overs=overs,
|
|
req=reqs,
|
|
used=useds,
|
|
allowed=total_alloweds)
|
|
|
|
return max_count
|
|
|
|
|
|
def get_over_quota_detail(headroom, overs, quotas, requested):
|
|
reqs = []
|
|
useds = []
|
|
total_alloweds = []
|
|
for resource in overs:
|
|
reqs.append(str(requested[resource]))
|
|
useds.append(str(quotas[resource] - headroom[resource]))
|
|
total_alloweds.append(str(quotas[resource]))
|
|
(overs, reqs, useds, total_alloweds) = map(', '.join, (
|
|
overs, reqs, useds, total_alloweds))
|
|
return overs, reqs, total_alloweds, useds
|
|
|
|
|
|
def remove_shelved_keys_from_system_metadata(instance):
|
|
# Delete system_metadata for a shelved instance
|
|
for key in ['shelved_at', 'shelved_image_id', 'shelved_host']:
|
|
if key in instance.system_metadata:
|
|
del (instance.system_metadata[key])
|
|
|
|
|
|
def may_have_ports_or_volumes(instance):
|
|
"""Checks to see if an instance may have ports or volumes based on vm_state
|
|
|
|
This is primarily only useful when instance.host is None.
|
|
|
|
:param instance: The nova.objects.Instance in question.
|
|
:returns: True if the instance may have ports of volumes, False otherwise
|
|
"""
|
|
# NOTE(melwitt): When an instance build fails in the compute manager,
|
|
# the instance host and node are set to None and the vm_state is set
|
|
# to ERROR. In the case, the instance with host = None has actually
|
|
# been scheduled and may have ports and/or volumes allocated on the
|
|
# compute node.
|
|
if instance.vm_state in (vm_states.SHELVED_OFFLOADED, vm_states.ERROR):
|
|
return True
|
|
return False
|
|
|
|
|
|
def get_stashed_volume_connector(bdm, instance):
|
|
"""Lookup a connector dict from the bdm.connection_info if set
|
|
|
|
Gets the stashed connector dict out of the bdm.connection_info if set
|
|
and the connector host matches the instance host.
|
|
|
|
:param bdm: nova.objects.block_device.BlockDeviceMapping
|
|
:param instance: nova.objects.instance.Instance
|
|
:returns: volume connector dict or None
|
|
"""
|
|
if 'connection_info' in bdm and bdm.connection_info is not None:
|
|
# NOTE(mriedem): We didn't start stashing the connector in the
|
|
# bdm.connection_info until Mitaka so it might not be there on old
|
|
# attachments. Also, if the volume was attached when the instance
|
|
# was in shelved_offloaded state and it hasn't been unshelved yet
|
|
# we don't have the attachment/connection information either.
|
|
connector = jsonutils.loads(bdm.connection_info).get('connector')
|
|
if connector:
|
|
if connector.get('host') == instance.host:
|
|
return connector
|
|
LOG.debug('Found stashed volume connector for instance but '
|
|
'connector host %(connector_host)s does not match '
|
|
'the instance host %(instance_host)s.',
|
|
{'connector_host': connector.get('host'),
|
|
'instance_host': instance.host}, instance=instance)
|
|
if (instance.host is None and
|
|
may_have_ports_or_volumes(instance)):
|
|
LOG.debug('Allowing use of stashed volume connector with '
|
|
'instance host None because instance with '
|
|
'vm_state %(vm_state)s has been scheduled in '
|
|
'the past.', {'vm_state': instance.vm_state},
|
|
instance=instance)
|
|
return connector
|
|
|
|
|
|
class EventReporter(object):
|
|
"""Context manager to report instance action events."""
|
|
|
|
def __init__(self, context, event_name, host, *instance_uuids):
|
|
self.context = context
|
|
self.event_name = event_name
|
|
self.instance_uuids = instance_uuids
|
|
self.host = host
|
|
|
|
def __enter__(self):
|
|
for uuid in self.instance_uuids:
|
|
objects.InstanceActionEvent.event_start(
|
|
self.context, uuid, self.event_name, want_result=False,
|
|
host=self.host)
|
|
|
|
return self
|
|
|
|
def __exit__(self, exc_type, exc_val, exc_tb):
|
|
for uuid in self.instance_uuids:
|
|
objects.InstanceActionEvent.event_finish_with_failure(
|
|
self.context, uuid, self.event_name, exc_val=exc_val,
|
|
exc_tb=exc_tb, want_result=False)
|
|
return False
|
|
|
|
|
|
def wrap_instance_event(prefix):
|
|
"""Wraps a method to log the event taken on the instance, and result.
|
|
|
|
This decorator wraps a method to log the start and result of an event, as
|
|
part of an action taken on an instance.
|
|
"""
|
|
@utils.expects_func_args('instance')
|
|
def helper(function):
|
|
|
|
@functools.wraps(function)
|
|
def decorated_function(self, context, *args, **kwargs):
|
|
wrapped_func = safe_utils.get_wrapped_function(function)
|
|
keyed_args = inspect.getcallargs(wrapped_func, self, context,
|
|
*args, **kwargs)
|
|
instance_uuid = keyed_args['instance']['uuid']
|
|
|
|
event_name = '{0}_{1}'.format(prefix, function.__name__)
|
|
host = self.host if hasattr(self, 'host') else None
|
|
with EventReporter(context, event_name, host, instance_uuid):
|
|
return function(self, context, *args, **kwargs)
|
|
return decorated_function
|
|
return helper
|
|
|
|
|
|
class UnlimitedSemaphore(object):
|
|
def __enter__(self):
|
|
pass
|
|
|
|
def __exit__(self, exc_type, exc_val, exc_tb):
|
|
pass
|
|
|
|
@property
|
|
def balance(self):
|
|
return 0
|
|
|
|
|
|
@contextlib.contextmanager
|
|
def notify_about_instance_delete(notifier, context, instance,
|
|
delete_type='delete'):
|
|
try:
|
|
notify_about_instance_usage(notifier, context, instance,
|
|
"%s.start" % delete_type)
|
|
yield
|
|
finally:
|
|
notify_about_instance_usage(notifier, context, instance,
|
|
"%s.end" % delete_type)
|