3797 lines
155 KiB
Python
Executable File
3797 lines
155 KiB
Python
Executable File
# 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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# All Rights Reserved.
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# Copyright (c) 2010 Citrix Systems, Inc.
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# Copyright (c) 2011 Piston Cloud Computing, Inc
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# Copyright (c) 2012 University Of Minho
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# (c) Copyright 2013 Hewlett-Packard Development Company, L.P.
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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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"""
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A connection to a hypervisor through libvirt.
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Supports KVM, LXC, QEMU, UML, and XEN.
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**Related Flags**
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:libvirt_type: Libvirt domain type. Can be kvm, qemu, uml, xen
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(default: kvm).
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:libvirt_uri: Override for the default libvirt URI (depends on libvirt_type).
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:libvirt_disk_prefix: Override the default disk prefix for the devices
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attached to a server.
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:rescue_image_id: Rescue ami image (None = original image).
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:rescue_kernel_id: Rescue aki image (None = original image).
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:rescue_ramdisk_id: Rescue ari image (None = original image).
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:injected_network_template: Template file for injected network
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:allow_same_net_traffic: Whether to allow in project network traffic
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"""
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import errno
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import eventlet
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import functools
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import glob
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import os
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import shutil
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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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import uuid
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from eventlet import greenio
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from eventlet import greenthread
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from eventlet import patcher
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from eventlet import tpool
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from eventlet import util as eventlet_util
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from lxml import etree
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from oslo.config import cfg
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from nova.api.metadata import base as instance_metadata
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from nova import block_device
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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 vm_mode
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from nova import context as nova_context
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from nova import exception
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from nova.image import glance
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from nova.openstack.common import excutils
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from nova.openstack.common import fileutils
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from nova.openstack.common import importutils
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from nova.openstack.common import jsonutils
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from nova.openstack.common import log as logging
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from nova.openstack.common.notifier import api as notifier
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from nova.openstack.common import xmlutils
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from nova import utils
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from nova import version
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from nova.virt import configdrive
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from nova.virt.disk import api as disk
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from nova.virt import driver
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from nova.virt import event as virtevent
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from nova.virt import firewall
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from nova.virt.libvirt import blockinfo
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from nova.virt.libvirt import config as vconfig
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from nova.virt.libvirt import firewall as libvirt_firewall
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from nova.virt.libvirt import imagebackend
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from nova.virt.libvirt import imagecache
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from nova.virt.libvirt import utils as libvirt_utils
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from nova.virt import netutils
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native_threading = patcher.original("threading")
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native_Queue = patcher.original("Queue")
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libvirt = None
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LOG = logging.getLogger(__name__)
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libvirt_opts = [
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cfg.StrOpt('rescue_image_id',
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default=None,
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help='Rescue ami image'),
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cfg.StrOpt('rescue_kernel_id',
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default=None,
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help='Rescue aki image'),
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cfg.StrOpt('rescue_ramdisk_id',
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default=None,
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help='Rescue ari image'),
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cfg.StrOpt('libvirt_type',
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default='kvm',
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help='Libvirt domain type (valid options are: '
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'kvm, lxc, qemu, uml, xen)'),
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cfg.StrOpt('libvirt_uri',
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default='',
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help='Override the default libvirt URI '
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'(which is dependent on libvirt_type)'),
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cfg.BoolOpt('libvirt_inject_password',
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default=False,
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help='Inject the admin password at boot time, '
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'without an agent.'),
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cfg.BoolOpt('libvirt_inject_key',
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default=True,
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help='Inject the ssh public key at boot time'),
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cfg.IntOpt('libvirt_inject_partition',
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default=1,
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help='The partition to inject to : '
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'-2 => disable, -1 => inspect (libguestfs only), '
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'0 => not partitioned, >0 => partition number'),
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cfg.BoolOpt('use_usb_tablet',
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default=True,
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help='Sync virtual and real mouse cursors in Windows VMs'),
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cfg.StrOpt('live_migration_uri',
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default="qemu+tcp://%s/system",
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help='Migration target URI '
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'(any included "%s" is replaced with '
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'the migration target hostname)'),
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cfg.StrOpt('live_migration_flag',
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default='VIR_MIGRATE_UNDEFINE_SOURCE, VIR_MIGRATE_PEER2PEER',
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help='Migration flags to be set for live migration'),
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cfg.StrOpt('block_migration_flag',
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default='VIR_MIGRATE_UNDEFINE_SOURCE, VIR_MIGRATE_PEER2PEER, '
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'VIR_MIGRATE_NON_SHARED_INC',
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help='Migration flags to be set for block migration'),
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cfg.IntOpt('live_migration_bandwidth',
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default=0,
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help='Maximum bandwidth to be used during migration, in Mbps'),
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cfg.StrOpt('snapshot_image_format',
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default=None,
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help='Snapshot image format (valid options are : '
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'raw, qcow2, vmdk, vdi). '
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'Defaults to same as source image'),
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cfg.StrOpt('libvirt_vif_driver',
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default='nova.virt.libvirt.vif.LibvirtGenericVIFDriver',
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help='The libvirt VIF driver to configure the VIFs.'),
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cfg.ListOpt('libvirt_volume_drivers',
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default=[
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'iscsi=nova.virt.libvirt.volume.LibvirtISCSIVolumeDriver',
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'local=nova.virt.libvirt.volume.LibvirtVolumeDriver',
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'fake=nova.virt.libvirt.volume.LibvirtFakeVolumeDriver',
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'rbd=nova.virt.libvirt.volume.LibvirtNetVolumeDriver',
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'sheepdog=nova.virt.libvirt.volume.LibvirtNetVolumeDriver',
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'nfs=nova.virt.libvirt.volume.LibvirtNFSVolumeDriver',
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'aoe=nova.virt.libvirt.volume.LibvirtAOEVolumeDriver',
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'glusterfs='
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'nova.virt.libvirt.volume.LibvirtGlusterfsVolumeDriver',
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'fibre_channel=nova.virt.libvirt.volume.'
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'LibvirtFibreChannelVolumeDriver',
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'scality='
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'nova.virt.libvirt.volume.LibvirtScalityVolumeDriver',
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],
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help='Libvirt handlers for remote volumes.'),
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cfg.StrOpt('libvirt_disk_prefix',
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default=None,
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help='Override the default disk prefix for the devices attached'
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' to a server, which is dependent on libvirt_type. '
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'(valid options are: sd, xvd, uvd, vd)'),
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cfg.IntOpt('libvirt_wait_soft_reboot_seconds',
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default=120,
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help='Number of seconds to wait for instance to shut down after'
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' soft reboot request is made. We fall back to hard reboot'
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' if instance does not shutdown within this window.'),
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cfg.BoolOpt('libvirt_nonblocking',
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default=True,
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help='Use a separated OS thread pool to realize non-blocking'
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' libvirt calls'),
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cfg.StrOpt('libvirt_cpu_mode',
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default=None,
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help='Set to "host-model" to clone the host CPU feature flags; '
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'to "host-passthrough" to use the host CPU model exactly; '
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'to "custom" to use a named CPU model; '
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'to "none" to not set any CPU model. '
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'If libvirt_type="kvm|qemu", it will default to '
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'"host-model", otherwise it will default to "none"'),
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cfg.StrOpt('libvirt_cpu_model',
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default=None,
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help='Set to a named libvirt CPU model (see names listed '
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'in /usr/share/libvirt/cpu_map.xml). Only has effect if '
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'libvirt_cpu_mode="custom" and libvirt_type="kvm|qemu"'),
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cfg.StrOpt('libvirt_snapshots_directory',
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default='$instances_path/snapshots',
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help='Location where libvirt driver will store snapshots '
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'before uploading them to image service'),
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cfg.StrOpt('xen_hvmloader_path',
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default='/usr/lib/xen/boot/hvmloader',
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help='Location where the Xen hvmloader is kept'),
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cfg.ListOpt('disk_cachemodes',
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default=[],
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help='Specific cachemodes to use for different disk types '
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'e.g: ["file=directsync","block=none"]'),
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]
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CONF = cfg.CONF
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CONF.register_opts(libvirt_opts)
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CONF.import_opt('host', 'nova.netconf')
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CONF.import_opt('my_ip', 'nova.netconf')
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CONF.import_opt('default_ephemeral_format', 'nova.virt.driver')
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CONF.import_opt('use_cow_images', 'nova.virt.driver')
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CONF.import_opt('live_migration_retry_count', 'nova.compute.manager')
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CONF.import_opt('vncserver_proxyclient_address', 'nova.vnc')
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CONF.import_opt('server_proxyclient_address', 'nova.spice', group='spice')
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DEFAULT_FIREWALL_DRIVER = "%s.%s" % (
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libvirt_firewall.__name__,
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libvirt_firewall.IptablesFirewallDriver.__name__)
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MAX_CONSOLE_BYTES = 102400
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def patch_tpool_proxy():
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"""eventlet.tpool.Proxy doesn't work with old-style class in __str__()
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or __repr__() calls. See bug #962840 for details.
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We perform a monkey patch to replace those two instance methods.
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"""
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def str_method(self):
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return str(self._obj)
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def repr_method(self):
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return repr(self._obj)
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tpool.Proxy.__str__ = str_method
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tpool.Proxy.__repr__ = repr_method
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patch_tpool_proxy()
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VIR_DOMAIN_NOSTATE = 0
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VIR_DOMAIN_RUNNING = 1
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VIR_DOMAIN_BLOCKED = 2
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VIR_DOMAIN_PAUSED = 3
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VIR_DOMAIN_SHUTDOWN = 4
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VIR_DOMAIN_SHUTOFF = 5
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VIR_DOMAIN_CRASHED = 6
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VIR_DOMAIN_PMSUSPENDED = 7
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LIBVIRT_POWER_STATE = {
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VIR_DOMAIN_NOSTATE: power_state.NOSTATE,
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VIR_DOMAIN_RUNNING: power_state.RUNNING,
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# NOTE(maoy): The DOMAIN_BLOCKED state is only valid in Xen.
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# It means that the VM is running and the vCPU is idle. So,
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# we map it to RUNNING
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VIR_DOMAIN_BLOCKED: power_state.RUNNING,
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VIR_DOMAIN_PAUSED: power_state.PAUSED,
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# NOTE(maoy): The libvirt API doc says that DOMAIN_SHUTDOWN
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# means the domain is being shut down. So technically the domain
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# is still running. SHUTOFF is the real powered off state.
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# But we will map both to SHUTDOWN anyway.
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# http://libvirt.org/html/libvirt-libvirt.html
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VIR_DOMAIN_SHUTDOWN: power_state.SHUTDOWN,
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VIR_DOMAIN_SHUTOFF: power_state.SHUTDOWN,
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VIR_DOMAIN_CRASHED: power_state.CRASHED,
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VIR_DOMAIN_PMSUSPENDED: power_state.SUSPENDED,
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}
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MIN_LIBVIRT_VERSION = (0, 9, 6)
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# When the above version matches/exceeds this version
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# delete it & corresponding code using it
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MIN_LIBVIRT_HOST_CPU_VERSION = (0, 9, 10)
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# Live snapshot requirements
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REQ_HYPERVISOR_LIVESNAPSHOT = "QEMU"
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MIN_LIBVIRT_LIVESNAPSHOT_VERSION = (1, 0, 0)
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MIN_QEMU_LIVESNAPSHOT_VERSION = (1, 3, 0)
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class LibvirtDriver(driver.ComputeDriver):
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capabilities = {
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"has_imagecache": True,
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"supports_recreate": True,
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}
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def __init__(self, virtapi, read_only=False):
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super(LibvirtDriver, self).__init__(virtapi)
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global libvirt
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if libvirt is None:
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libvirt = __import__('libvirt')
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self._host_state = None
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self._initiator = None
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self._fc_wwnns = None
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self._fc_wwpns = None
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self._wrapped_conn = None
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self._caps = None
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self.read_only = read_only
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self.firewall_driver = firewall.load_driver(
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DEFAULT_FIREWALL_DRIVER,
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self.virtapi,
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get_connection=self._get_connection)
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vif_class = importutils.import_class(CONF.libvirt_vif_driver)
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self.vif_driver = vif_class(self._get_connection)
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self.volume_drivers = driver.driver_dict_from_config(
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CONF.libvirt_volume_drivers, self)
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self._host_state = None
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self._event_queue = None
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self._disk_cachemode = None
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self.image_cache_manager = imagecache.ImageCacheManager()
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self.image_backend = imagebackend.Backend(CONF.use_cow_images)
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self.disk_cachemodes = {}
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self.valid_cachemodes = ["default",
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"none",
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"writethrough",
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"writeback",
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"directsync",
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"writethrough",
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"unsafe",
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]
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for mode_str in CONF.disk_cachemodes:
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disk_type, sep, cache_mode = mode_str.partition('=')
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if cache_mode not in self.valid_cachemodes:
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LOG.warn(_("Invalid cachemode %(cache_mode)s specified "
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"for disk type %(disk_type)s.") % locals())
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continue
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self.disk_cachemodes[disk_type] = cache_mode
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@property
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def disk_cachemode(self):
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if self._disk_cachemode is None:
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# We prefer 'none' for consistent performance, host crash
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# safety & migration correctness by avoiding host page cache.
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# Some filesystems (eg GlusterFS via FUSE) don't support
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# O_DIRECT though. For those we fallback to 'writethrough'
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# which gives host crash safety, and is safe for migration
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# provided the filesystem is cache coherant (cluster filesystems
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# typically are, but things like NFS are not).
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self._disk_cachemode = "none"
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if not self._supports_direct_io(CONF.instances_path):
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self._disk_cachemode = "writethrough"
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return self._disk_cachemode
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@property
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def host_state(self):
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if not self._host_state:
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self._host_state = HostState(self)
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return self._host_state
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def set_cache_mode(self, conf):
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"""Set cache mode on LibvirtConfigGuestDisk object."""
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try:
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source_type = conf.source_type
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driver_cache = conf.driver_cache
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except AttributeError:
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return
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cache_mode = self.disk_cachemodes.get(source_type,
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driver_cache)
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conf.driver_cache = cache_mode
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def has_min_version(self, lv_ver=None, hv_ver=None, hv_type=None):
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def _munge_version(ver):
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return ver[0] * 1000000 + ver[1] * 1000 + ver[2]
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try:
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if lv_ver is not None:
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libvirt_version = self._conn.getLibVersion()
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if libvirt_version < _munge_version(lv_ver):
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return False
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if hv_ver is not None:
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hypervisor_version = self._conn.getVersion()
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if hypervisor_version < _munge_version(hv_ver):
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return False
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if hv_type is not None:
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hypervisor_type = self._conn.getType()
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if hypervisor_type != hv_type:
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return False
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return True
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except Exception:
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return False
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def _native_thread(self):
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"""Receives async events coming in from libvirtd.
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This is a native thread which runs the default
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libvirt event loop implementation. This processes
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any incoming async events from libvirtd and queues
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them for later dispatch. This thread is only
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permitted to use libvirt python APIs, and the
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driver.queue_event method. In particular any use
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of logging is forbidden, since it will confuse
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eventlet's greenthread integration"""
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while True:
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libvirt.virEventRunDefaultImpl()
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def _dispatch_thread(self):
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"""Dispatches async events coming in from libvirtd.
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This is a green thread which waits for events to
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arrive from the libvirt event loop thread. This
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then dispatches the events to the compute manager."""
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while True:
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self._dispatch_events()
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@staticmethod
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def _event_lifecycle_callback(conn, dom, event, detail, opaque):
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"""Receives lifecycle events from libvirt.
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NB: this method is executing in a native thread, not
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an eventlet coroutine. It can only invoke other libvirt
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APIs, or use self.queue_event(). Any use of logging APIs
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in particular is forbidden."""
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self = opaque
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uuid = dom.UUIDString()
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transition = None
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if event == libvirt.VIR_DOMAIN_EVENT_STOPPED:
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transition = virtevent.EVENT_LIFECYCLE_STOPPED
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elif event == libvirt.VIR_DOMAIN_EVENT_STARTED:
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transition = virtevent.EVENT_LIFECYCLE_STARTED
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elif event == libvirt.VIR_DOMAIN_EVENT_SUSPENDED:
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transition = virtevent.EVENT_LIFECYCLE_PAUSED
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elif event == libvirt.VIR_DOMAIN_EVENT_RESUMED:
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transition = virtevent.EVENT_LIFECYCLE_RESUMED
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if transition is not None:
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self._queue_event(virtevent.LifecycleEvent(uuid, transition))
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def _queue_event(self, event):
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"""Puts an event on the queue for dispatch.
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This method is called by the native event thread to
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put events on the queue for later dispatch by the
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green thread."""
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if self._event_queue is None:
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LOG.debug("Event loop thread is not active, "
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"discarding event %s" % event)
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return
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# Queue the event...
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self._event_queue.put(event)
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# ...then wakeup the green thread to dispatch it
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c = ' '.encode()
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self._event_notify_send.write(c)
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self._event_notify_send.flush()
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def _dispatch_events(self):
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"""Wait for & dispatch events from native thread
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Blocks until native thread indicates some events
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are ready. Then dispatches all queued events."""
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# Wait to be notified that there are some
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# events pending
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try:
|
|
_c = self._event_notify_recv.read(1)
|
|
assert _c
|
|
except ValueError:
|
|
return # will be raised when pipe is closed
|
|
|
|
# Process as many events as possible without
|
|
# blocking
|
|
while not self._event_queue.empty():
|
|
try:
|
|
event = self._event_queue.get(block=False)
|
|
self.emit_event(event)
|
|
except native_Queue.Empty:
|
|
pass
|
|
|
|
def _init_events_pipe(self):
|
|
"""Create a self-pipe for the native thread to synchronize on.
|
|
|
|
This code is taken from the eventlet tpool module, under terms
|
|
of the Apache License v2.0."""
|
|
|
|
self._event_queue = native_Queue.Queue()
|
|
try:
|
|
rpipe, wpipe = os.pipe()
|
|
self._event_notify_send = greenio.GreenPipe(wpipe, 'wb', 0)
|
|
self._event_notify_recv = greenio.GreenPipe(rpipe, 'rb', 0)
|
|
except (ImportError, NotImplementedError):
|
|
# This is Windows compatibility -- use a socket instead
|
|
# of a pipe because pipes don't really exist on Windows.
|
|
sock = eventlet_util.__original_socket__(socket.AF_INET,
|
|
socket.SOCK_STREAM)
|
|
sock.bind(('localhost', 0))
|
|
sock.listen(50)
|
|
csock = eventlet_util.__original_socket__(socket.AF_INET,
|
|
socket.SOCK_STREAM)
|
|
csock.connect(('localhost', sock.getsockname()[1]))
|
|
nsock, addr = sock.accept()
|
|
self._event_notify_send = nsock.makefile('wb', 0)
|
|
gsock = greenio.GreenSocket(csock)
|
|
self._event_notify_recv = gsock.makefile('rb', 0)
|
|
|
|
def _init_events(self):
|
|
"""Initializes the libvirt events subsystem.
|
|
|
|
This requires running a native thread to provide the
|
|
libvirt event loop integration. This forwards events
|
|
to a green thread which does the actual dispatching.
|
|
"""
|
|
|
|
self._init_events_pipe()
|
|
|
|
LOG.debug("Starting native event thread")
|
|
event_thread = native_threading.Thread(target=self._native_thread)
|
|
event_thread.setDaemon(True)
|
|
event_thread.start()
|
|
|
|
LOG.debug("Starting green dispatch thread")
|
|
dispatch_thread = eventlet.spawn(self._dispatch_thread)
|
|
|
|
def init_host(self, host):
|
|
libvirt.virEventRegisterDefaultImpl()
|
|
|
|
if not self.has_min_version(MIN_LIBVIRT_VERSION):
|
|
major = MIN_LIBVIRT_VERSION[0]
|
|
minor = MIN_LIBVIRT_VERSION[1]
|
|
micro = MIN_LIBVIRT_VERSION[2]
|
|
LOG.error(_('Nova requires libvirt version '
|
|
'%(major)i.%(minor)i.%(micro)i or greater.') %
|
|
locals())
|
|
|
|
self._init_events()
|
|
|
|
def _get_connection(self):
|
|
if not self._wrapped_conn or not self._test_connection():
|
|
LOG.debug(_('Connecting to libvirt: %s'), self.uri())
|
|
if not CONF.libvirt_nonblocking:
|
|
self._wrapped_conn = self._connect(self.uri(),
|
|
self.read_only)
|
|
else:
|
|
self._wrapped_conn = tpool.proxy_call(
|
|
(libvirt.virDomain, libvirt.virConnect),
|
|
self._connect, self.uri(), self.read_only)
|
|
|
|
try:
|
|
LOG.debug("Registering for lifecycle events %s" % str(self))
|
|
self._wrapped_conn.domainEventRegisterAny(
|
|
None,
|
|
libvirt.VIR_DOMAIN_EVENT_ID_LIFECYCLE,
|
|
self._event_lifecycle_callback,
|
|
self)
|
|
except Exception, e:
|
|
LOG.warn(_("URI %s does not support events"),
|
|
self.uri())
|
|
|
|
return self._wrapped_conn
|
|
|
|
_conn = property(_get_connection)
|
|
|
|
def _test_connection(self):
|
|
try:
|
|
self._wrapped_conn.getLibVersion()
|
|
return True
|
|
except libvirt.libvirtError as e:
|
|
if (e.get_error_code() in (libvirt.VIR_ERR_SYSTEM_ERROR,
|
|
libvirt.VIR_ERR_INTERNAL_ERROR) and
|
|
e.get_error_domain() in (libvirt.VIR_FROM_REMOTE,
|
|
libvirt.VIR_FROM_RPC)):
|
|
LOG.debug(_('Connection to libvirt broke'))
|
|
return False
|
|
raise
|
|
|
|
@staticmethod
|
|
def uri():
|
|
if CONF.libvirt_type == 'uml':
|
|
uri = CONF.libvirt_uri or 'uml:///system'
|
|
elif CONF.libvirt_type == 'xen':
|
|
uri = CONF.libvirt_uri or 'xen:///'
|
|
elif CONF.libvirt_type == 'lxc':
|
|
uri = CONF.libvirt_uri or 'lxc:///'
|
|
else:
|
|
uri = CONF.libvirt_uri or 'qemu:///system'
|
|
return uri
|
|
|
|
@staticmethod
|
|
def _connect(uri, read_only):
|
|
def _connect_auth_cb(creds, opaque):
|
|
if len(creds) == 0:
|
|
return 0
|
|
LOG.warning(
|
|
_("Can not handle authentication request for %d credentials")
|
|
% len(creds))
|
|
raise exception.NovaException(
|
|
_("Can not handle authentication request for %d credentials")
|
|
% len(creds))
|
|
|
|
auth = [[libvirt.VIR_CRED_AUTHNAME,
|
|
libvirt.VIR_CRED_ECHOPROMPT,
|
|
libvirt.VIR_CRED_REALM,
|
|
libvirt.VIR_CRED_PASSPHRASE,
|
|
libvirt.VIR_CRED_NOECHOPROMPT,
|
|
libvirt.VIR_CRED_EXTERNAL],
|
|
_connect_auth_cb,
|
|
None]
|
|
|
|
try:
|
|
if read_only:
|
|
return libvirt.openReadOnly(uri)
|
|
else:
|
|
return libvirt.openAuth(uri, auth, 0)
|
|
except libvirt.libvirtError as ex:
|
|
LOG.exception(_("Connection to libvirt failed: %s"), ex)
|
|
payload = dict(ip=LibvirtDriver.get_host_ip_addr(),
|
|
method='_connect',
|
|
reason=ex)
|
|
notifier.notify(nova_context.get_admin_context(),
|
|
notifier.publisher_id('compute'),
|
|
'compute.libvirt.error',
|
|
notifier.ERROR,
|
|
payload)
|
|
pass
|
|
|
|
def get_num_instances(self):
|
|
"""Efficient override of base instance_exists method."""
|
|
return self._conn.numOfDomains()
|
|
|
|
def instance_exists(self, instance_name):
|
|
"""Efficient override of base instance_exists method."""
|
|
try:
|
|
self._lookup_by_name(instance_name)
|
|
return True
|
|
except exception.NovaException:
|
|
return False
|
|
|
|
def legacy_nwinfo(self):
|
|
return True
|
|
|
|
# TODO(Shrews): Remove when libvirt Bugzilla bug # 836647 is fixed.
|
|
def list_instance_ids(self):
|
|
if self._conn.numOfDomains() == 0:
|
|
return []
|
|
return self._conn.listDomainsID()
|
|
|
|
def list_instances(self):
|
|
names = []
|
|
for domain_id in self.list_instance_ids():
|
|
try:
|
|
# We skip domains with ID 0 (hypervisors).
|
|
if domain_id != 0:
|
|
domain = self._conn.lookupByID(domain_id)
|
|
names.append(domain.name())
|
|
except libvirt.libvirtError:
|
|
# Instance was deleted while listing... ignore it
|
|
pass
|
|
|
|
# extend instance list to contain also defined domains
|
|
names.extend([vm for vm in self._conn.listDefinedDomains()
|
|
if vm not in names])
|
|
|
|
return names
|
|
|
|
def list_instance_uuids(self):
|
|
return [self._conn.lookupByName(name).UUIDString()
|
|
for name in self.list_instances()]
|
|
|
|
def plug_vifs(self, instance, network_info):
|
|
"""Plug VIFs into networks."""
|
|
for (network, mapping) in network_info:
|
|
self.vif_driver.plug(instance, (network, mapping))
|
|
|
|
def unplug_vifs(self, instance, network_info):
|
|
"""Unplug VIFs from networks."""
|
|
for (network, mapping) in network_info:
|
|
self.vif_driver.unplug(instance, (network, mapping))
|
|
|
|
def _destroy(self, instance):
|
|
try:
|
|
virt_dom = self._lookup_by_name(instance['name'])
|
|
except exception.NotFound:
|
|
virt_dom = None
|
|
|
|
# If the instance is already terminated, we're still happy
|
|
# Otherwise, destroy it
|
|
old_domid = -1
|
|
if virt_dom is not None:
|
|
try:
|
|
old_domid = virt_dom.ID()
|
|
virt_dom.destroy()
|
|
except libvirt.libvirtError as e:
|
|
is_okay = False
|
|
errcode = e.get_error_code()
|
|
if errcode == libvirt.VIR_ERR_OPERATION_INVALID:
|
|
# If the instance is already shut off, we get this:
|
|
# Code=55 Error=Requested operation is not valid:
|
|
# domain is not running
|
|
(state, _max_mem, _mem, _cpus, _t) = virt_dom.info()
|
|
state = LIBVIRT_POWER_STATE[state]
|
|
if state == power_state.SHUTDOWN:
|
|
is_okay = True
|
|
elif errcode == libvirt.VIR_ERR_OPERATION_TIMEOUT:
|
|
LOG.warn(_("Cannot destroy instance, operation time out"),
|
|
instance=instance)
|
|
reason = _("operation time out")
|
|
raise exception.InstancePowerOffFailure(reason=reason)
|
|
|
|
if not is_okay:
|
|
with excutils.save_and_reraise_exception():
|
|
LOG.error(_("Error from libvirt during destroy. "
|
|
"Code=%(errcode)s Error=%(e)s") %
|
|
locals(), instance=instance)
|
|
|
|
def _wait_for_destroy(expected_domid):
|
|
"""Called at an interval until the VM is gone."""
|
|
# NOTE(vish): If the instance disappears during the destroy
|
|
# we ignore it so the cleanup can still be
|
|
# attempted because we would prefer destroy to
|
|
# never fail.
|
|
try:
|
|
dom_info = self.get_info(instance)
|
|
state = dom_info['state']
|
|
new_domid = dom_info['id']
|
|
except exception.NotFound:
|
|
LOG.error(_("During wait destroy, instance disappeared."),
|
|
instance=instance)
|
|
raise utils.LoopingCallDone()
|
|
|
|
if state == power_state.SHUTDOWN:
|
|
LOG.info(_("Instance destroyed successfully."),
|
|
instance=instance)
|
|
raise utils.LoopingCallDone()
|
|
|
|
# NOTE(wangpan): If the instance was booted again after destroy,
|
|
# this may be a endless loop, so check the id of
|
|
# domain here, if it changed and the instance is
|
|
# still running, we should destroy it again.
|
|
# see https://bugs.launchpad.net/nova/+bug/1111213 for more details
|
|
if new_domid != expected_domid:
|
|
LOG.info(_("Instance may be started again."),
|
|
instance=instance)
|
|
kwargs['is_running'] = True
|
|
raise utils.LoopingCallDone()
|
|
|
|
kwargs = {'is_running': False}
|
|
timer = utils.FixedIntervalLoopingCall(_wait_for_destroy, old_domid)
|
|
timer.start(interval=0.5).wait()
|
|
if kwargs['is_running']:
|
|
LOG.info(_("Going to destroy instance again."), instance=instance)
|
|
self._destroy(instance)
|
|
|
|
def destroy(self, instance, network_info, block_device_info=None,
|
|
destroy_disks=True):
|
|
self._destroy(instance)
|
|
self._cleanup(instance, network_info, block_device_info, destroy_disks)
|
|
|
|
def _undefine_domain(self, instance):
|
|
try:
|
|
virt_dom = self._lookup_by_name(instance['name'])
|
|
except exception.NotFound:
|
|
virt_dom = None
|
|
if virt_dom:
|
|
try:
|
|
try:
|
|
virt_dom.undefineFlags(
|
|
libvirt.VIR_DOMAIN_UNDEFINE_MANAGED_SAVE)
|
|
except libvirt.libvirtError:
|
|
LOG.debug(_("Error from libvirt during undefineFlags."
|
|
" Retrying with undefine"), instance=instance)
|
|
virt_dom.undefine()
|
|
except AttributeError:
|
|
# NOTE(vish): Older versions of libvirt don't support
|
|
# undefine flags, so attempt to do the
|
|
# right thing.
|
|
try:
|
|
if virt_dom.hasManagedSaveImage(0):
|
|
virt_dom.managedSaveRemove(0)
|
|
except AttributeError:
|
|
pass
|
|
virt_dom.undefine()
|
|
except libvirt.libvirtError as e:
|
|
with excutils.save_and_reraise_exception():
|
|
errcode = e.get_error_code()
|
|
LOG.error(_("Error from libvirt during undefine. "
|
|
"Code=%(errcode)s Error=%(e)s") %
|
|
locals(), instance=instance)
|
|
|
|
def _cleanup(self, instance, network_info, block_device_info,
|
|
destroy_disks):
|
|
self._undefine_domain(instance)
|
|
self.unplug_vifs(instance, network_info)
|
|
retry = True
|
|
while retry:
|
|
try:
|
|
self.firewall_driver.unfilter_instance(instance,
|
|
network_info=network_info)
|
|
except libvirt.libvirtError as e:
|
|
try:
|
|
state = self.get_info(instance)['state']
|
|
except exception.NotFound:
|
|
state = power_state.SHUTDOWN
|
|
|
|
if state != power_state.SHUTDOWN:
|
|
LOG.warn(_("Instance may be still running, destroy "
|
|
"it again."), instance=instance)
|
|
self._destroy(instance)
|
|
else:
|
|
retry = False
|
|
errcode = e.get_error_code()
|
|
LOG.error(_("Error from libvirt during unfilter. "
|
|
"Code=%(errcode)s Error=%(e)s") %
|
|
locals(), instance=instance)
|
|
reason = "Error unfiltering instance."
|
|
raise exception.InstanceTerminationFailure(reason=reason)
|
|
except Exception:
|
|
retry = False
|
|
raise
|
|
else:
|
|
retry = False
|
|
|
|
# FIXME(wangpan): if the instance is booted again here, such as the
|
|
# the soft reboot operation boot it here, it will
|
|
# become "running deleted", should we check and destroy
|
|
# it at the end of this method?
|
|
|
|
# NOTE(vish): we disconnect from volumes regardless
|
|
block_device_mapping = driver.block_device_info_get_mapping(
|
|
block_device_info)
|
|
for vol in block_device_mapping:
|
|
connection_info = vol['connection_info']
|
|
disk_dev = vol['mount_device'].rpartition("/")[2]
|
|
self.volume_driver_method('disconnect_volume',
|
|
connection_info,
|
|
disk_dev)
|
|
|
|
if destroy_disks:
|
|
target = libvirt_utils.get_instance_path(instance)
|
|
LOG.info(_('Deleting instance files %(target)s') % locals(),
|
|
instance=instance)
|
|
if os.path.exists(target):
|
|
# If we fail to get rid of the directory
|
|
# tree, this shouldn't block deletion of
|
|
# the instance as whole.
|
|
try:
|
|
shutil.rmtree(target)
|
|
except OSError, e:
|
|
LOG.error(_("Failed to cleanup directory %(target)s: %(e)s"
|
|
) % locals())
|
|
|
|
#NOTE(bfilippov): destroy all LVM disks for this instance
|
|
self._cleanup_lvm(instance)
|
|
|
|
def _cleanup_lvm(self, instance):
|
|
"""Delete all LVM disks for given instance object."""
|
|
disks = self._lvm_disks(instance)
|
|
if disks:
|
|
libvirt_utils.remove_logical_volumes(*disks)
|
|
|
|
def _lvm_disks(self, instance):
|
|
"""Returns all LVM disks for given instance object."""
|
|
if CONF.libvirt_images_volume_group:
|
|
vg = os.path.join('/dev', CONF.libvirt_images_volume_group)
|
|
if not os.path.exists(vg):
|
|
return []
|
|
pattern = '%s_' % instance['name']
|
|
|
|
def belongs_to_instance(disk):
|
|
return disk.startswith(pattern)
|
|
|
|
def fullpath(name):
|
|
return os.path.join(vg, name)
|
|
|
|
logical_volumes = libvirt_utils.list_logical_volumes(vg)
|
|
|
|
disk_names = filter(belongs_to_instance, logical_volumes)
|
|
disks = map(fullpath, disk_names)
|
|
return disks
|
|
return []
|
|
|
|
def get_volume_connector(self, instance):
|
|
if not self._initiator:
|
|
self._initiator = libvirt_utils.get_iscsi_initiator()
|
|
if not self._initiator:
|
|
LOG.debug(_('Could not determine iscsi initiator name'),
|
|
instance=instance)
|
|
|
|
if not self._fc_wwnns:
|
|
self._fc_wwnns = libvirt_utils.get_fc_wwnns()
|
|
if not self._fc_wwnns or len(self._fc_wwnns) == 0:
|
|
LOG.debug(_('Could not determine fibre channel '
|
|
'world wide node names'),
|
|
instance=instance)
|
|
|
|
if not self._fc_wwpns:
|
|
self._fc_wwpns = libvirt_utils.get_fc_wwpns()
|
|
if not self._fc_wwpns or len(self._fc_wwpns) == 0:
|
|
LOG.debug(_('Could not determine fibre channel '
|
|
'world wide port names'),
|
|
instance=instance)
|
|
|
|
connector = {'ip': CONF.my_ip,
|
|
'host': CONF.host}
|
|
|
|
if self._initiator:
|
|
connector['initiator'] = self._initiator
|
|
|
|
if self._fc_wwnns and self._fc_wwpns:
|
|
connector["wwnns"] = self._fc_wwnns
|
|
connector["wwpns"] = self._fc_wwpns
|
|
|
|
return connector
|
|
|
|
def _cleanup_resize(self, instance, network_info):
|
|
target = libvirt_utils.get_instance_path(instance) + "_resize"
|
|
if os.path.exists(target):
|
|
shutil.rmtree(target)
|
|
|
|
if instance['host'] != CONF.host:
|
|
self._undefine_domain(instance)
|
|
self.unplug_vifs(instance, network_info)
|
|
self.firewall_driver.unfilter_instance(instance, network_info)
|
|
|
|
def volume_driver_method(self, method_name, connection_info,
|
|
*args, **kwargs):
|
|
driver_type = connection_info.get('driver_volume_type')
|
|
if driver_type not in self.volume_drivers:
|
|
raise exception.VolumeDriverNotFound(driver_type=driver_type)
|
|
driver = self.volume_drivers[driver_type]
|
|
method = getattr(driver, method_name)
|
|
return method(connection_info, *args, **kwargs)
|
|
|
|
def attach_volume(self, connection_info, instance, mountpoint):
|
|
instance_name = instance['name']
|
|
virt_dom = self._lookup_by_name(instance_name)
|
|
disk_dev = mountpoint.rpartition("/")[2]
|
|
disk_info = {
|
|
'dev': disk_dev,
|
|
'bus': blockinfo.get_disk_bus_for_disk_dev(CONF.libvirt_type,
|
|
disk_dev),
|
|
'type': 'disk',
|
|
}
|
|
conf = self.volume_driver_method('connect_volume',
|
|
connection_info,
|
|
disk_info)
|
|
self.set_cache_mode(conf)
|
|
|
|
try:
|
|
# NOTE(vish): We can always affect config because our
|
|
# domains are persistent, but we should only
|
|
# affect live if the domain is running.
|
|
flags = libvirt.VIR_DOMAIN_AFFECT_CONFIG
|
|
state = LIBVIRT_POWER_STATE[virt_dom.info()[0]]
|
|
if state == power_state.RUNNING:
|
|
flags |= libvirt.VIR_DOMAIN_AFFECT_LIVE
|
|
virt_dom.attachDeviceFlags(conf.to_xml(), flags)
|
|
except Exception, ex:
|
|
if isinstance(ex, libvirt.libvirtError):
|
|
errcode = ex.get_error_code()
|
|
if errcode == libvirt.VIR_ERR_OPERATION_FAILED:
|
|
self.volume_driver_method('disconnect_volume',
|
|
connection_info,
|
|
disk_dev)
|
|
raise exception.DeviceIsBusy(device=disk_dev)
|
|
|
|
with excutils.save_and_reraise_exception():
|
|
self.volume_driver_method('disconnect_volume',
|
|
connection_info,
|
|
disk_dev)
|
|
|
|
@staticmethod
|
|
def _get_disk_xml(xml, device):
|
|
"""Returns the xml for the disk mounted at device."""
|
|
try:
|
|
doc = etree.fromstring(xml)
|
|
except Exception:
|
|
return None
|
|
ret = doc.findall('./devices/disk')
|
|
for node in ret:
|
|
for child in node.getchildren():
|
|
if child.tag == 'target':
|
|
if child.get('dev') == device:
|
|
return etree.tostring(node)
|
|
|
|
def _get_existing_domain_xml(self, instance, network_info,
|
|
block_device_info=None):
|
|
try:
|
|
virt_dom = self._lookup_by_name(instance['name'])
|
|
xml = virt_dom.XMLDesc(0)
|
|
except exception.InstanceNotFound:
|
|
disk_info = blockinfo.get_disk_info(CONF.libvirt_type,
|
|
instance,
|
|
block_device_info)
|
|
xml = self.to_xml(instance, network_info, disk_info,
|
|
block_device_info=block_device_info)
|
|
return xml
|
|
|
|
def detach_volume(self, connection_info, instance, mountpoint):
|
|
instance_name = instance['name']
|
|
disk_dev = mountpoint.rpartition("/")[2]
|
|
try:
|
|
virt_dom = self._lookup_by_name(instance_name)
|
|
xml = self._get_disk_xml(virt_dom.XMLDesc(0), disk_dev)
|
|
if not xml:
|
|
raise exception.DiskNotFound(location=disk_dev)
|
|
else:
|
|
# NOTE(vish): We can always affect config because our
|
|
# domains are persistent, but we should only
|
|
# affect live if the domain is running.
|
|
flags = libvirt.VIR_DOMAIN_AFFECT_CONFIG
|
|
state = LIBVIRT_POWER_STATE[virt_dom.info()[0]]
|
|
if state == power_state.RUNNING:
|
|
flags |= libvirt.VIR_DOMAIN_AFFECT_LIVE
|
|
virt_dom.detachDeviceFlags(xml, flags)
|
|
except libvirt.libvirtError as ex:
|
|
# NOTE(vish): This is called to cleanup volumes after live
|
|
# migration, so we should still disconnect even if
|
|
# the instance doesn't exist here anymore.
|
|
error_code = ex.get_error_code()
|
|
if error_code == libvirt.VIR_ERR_NO_DOMAIN:
|
|
# NOTE(vish):
|
|
LOG.warn(_("During detach_volume, instance disappeared."))
|
|
else:
|
|
raise
|
|
|
|
self.volume_driver_method('disconnect_volume',
|
|
connection_info,
|
|
disk_dev)
|
|
|
|
@exception.wrap_exception()
|
|
def attach_interface(self, instance, image_meta, network_info):
|
|
virt_dom = self._lookup_by_name(instance['name'])
|
|
for (network, mapping) in network_info:
|
|
self.vif_driver.plug(instance, (network, mapping))
|
|
self.firewall_driver.setup_basic_filtering(instance,
|
|
[(network, mapping)])
|
|
cfg = self.vif_driver.get_config(instance, network, mapping,
|
|
image_meta)
|
|
try:
|
|
flags = libvirt.VIR_DOMAIN_AFFECT_CONFIG
|
|
state = LIBVIRT_POWER_STATE[virt_dom.info()[0]]
|
|
if state == power_state.RUNNING:
|
|
flags |= libvirt.VIR_DOMAIN_AFFECT_LIVE
|
|
virt_dom.attachDeviceFlags(cfg.to_xml(), flags)
|
|
except libvirt.libvirtError as ex:
|
|
LOG.error(_('attaching network adapter failed.'),
|
|
instance=instance)
|
|
self.vif_driver.unplug(instance, (network, mapping))
|
|
raise exception.InterfaceAttachFailed(instance)
|
|
|
|
@exception.wrap_exception()
|
|
def detach_interface(self, instance, network_info):
|
|
virt_dom = self._lookup_by_name(instance['name'])
|
|
for (network, mapping) in network_info:
|
|
cfg = self.vif_driver.get_config(instance, network, mapping, None)
|
|
try:
|
|
self.vif_driver.unplug(instance, (network, mapping))
|
|
flags = libvirt.VIR_DOMAIN_AFFECT_CONFIG
|
|
state = LIBVIRT_POWER_STATE[virt_dom.info()[0]]
|
|
if state == power_state.RUNNING:
|
|
flags |= libvirt.VIR_DOMAIN_AFFECT_LIVE
|
|
virt_dom.detachDeviceFlags(cfg.to_xml(), flags)
|
|
except libvirt.libvirtError as ex:
|
|
error_code = ex.get_error_code()
|
|
if error_code == libvirt.VIR_ERR_NO_DOMAIN:
|
|
LOG.warn(_("During detach_interface, "
|
|
"instance disappeared."),
|
|
instance=instance)
|
|
else:
|
|
LOG.error(_('detaching network adapter failed.'),
|
|
instance=instance)
|
|
raise exception.InterfaceDetachFailed(instance)
|
|
|
|
def snapshot(self, context, instance, image_href, update_task_state):
|
|
"""Create snapshot from a running VM instance.
|
|
|
|
This command only works with qemu 0.14+
|
|
"""
|
|
try:
|
|
virt_dom = self._lookup_by_name(instance['name'])
|
|
except exception.InstanceNotFound:
|
|
raise exception.InstanceNotRunning(instance_id=instance['uuid'])
|
|
|
|
(image_service, image_id) = glance.get_remote_image_service(
|
|
context, instance['image_ref'])
|
|
try:
|
|
base = image_service.show(context, image_id)
|
|
except exception.ImageNotFound:
|
|
base = {}
|
|
|
|
_image_service = glance.get_remote_image_service(context, image_href)
|
|
snapshot_image_service, snapshot_image_id = _image_service
|
|
snapshot = snapshot_image_service.show(context, snapshot_image_id)
|
|
|
|
metadata = {'is_public': False,
|
|
'status': 'active',
|
|
'name': snapshot['name'],
|
|
'properties': {
|
|
'kernel_id': instance['kernel_id'],
|
|
'image_location': 'snapshot',
|
|
'image_state': 'available',
|
|
'owner_id': instance['project_id'],
|
|
'ramdisk_id': instance['ramdisk_id'],
|
|
}
|
|
}
|
|
if 'architecture' in base.get('properties', {}):
|
|
arch = base['properties']['architecture']
|
|
metadata['properties']['architecture'] = arch
|
|
|
|
disk_path = libvirt_utils.find_disk(virt_dom)
|
|
source_format = libvirt_utils.get_disk_type(disk_path)
|
|
|
|
image_format = CONF.snapshot_image_format or source_format
|
|
|
|
# NOTE(bfilippov): save lvm as raw
|
|
if image_format == 'lvm':
|
|
image_format = 'raw'
|
|
|
|
# NOTE(vish): glance forces ami disk format to be ami
|
|
if base.get('disk_format') == 'ami':
|
|
metadata['disk_format'] = 'ami'
|
|
else:
|
|
metadata['disk_format'] = image_format
|
|
|
|
metadata['container_format'] = base.get('container_format', 'bare')
|
|
|
|
snapshot_name = uuid.uuid4().hex
|
|
|
|
(state, _max_mem, _mem, _cpus, _t) = virt_dom.info()
|
|
state = LIBVIRT_POWER_STATE[state]
|
|
|
|
# NOTE(rmk): Live snapshots require QEMU 1.3 and Libvirt 1.0.0.
|
|
# These restrictions can be relaxed as other configurations
|
|
# can be validated.
|
|
if self.has_min_version(MIN_LIBVIRT_LIVESNAPSHOT_VERSION,
|
|
MIN_QEMU_LIVESNAPSHOT_VERSION,
|
|
REQ_HYPERVISOR_LIVESNAPSHOT) \
|
|
and not source_format == "lvm":
|
|
live_snapshot = True
|
|
else:
|
|
live_snapshot = False
|
|
|
|
# NOTE(rmk): We cannot perform live snapshots when a managedSave
|
|
# file is present, so we will use the cold/legacy method
|
|
# for instances which are shutdown.
|
|
if state == power_state.SHUTDOWN:
|
|
live_snapshot = False
|
|
|
|
# NOTE(dkang): managedSave does not work for LXC
|
|
if CONF.libvirt_type != 'lxc' and not live_snapshot:
|
|
if state == power_state.RUNNING or state == power_state.PAUSED:
|
|
virt_dom.managedSave(0)
|
|
|
|
snapshot_backend = self.image_backend.snapshot(disk_path,
|
|
snapshot_name,
|
|
image_type=source_format)
|
|
|
|
if live_snapshot:
|
|
LOG.info(_("Beginning live snapshot process"),
|
|
instance=instance)
|
|
else:
|
|
LOG.info(_("Beginning cold snapshot process"),
|
|
instance=instance)
|
|
snapshot_backend.snapshot_create()
|
|
|
|
update_task_state(task_state=task_states.IMAGE_PENDING_UPLOAD)
|
|
snapshot_directory = CONF.libvirt_snapshots_directory
|
|
fileutils.ensure_tree(snapshot_directory)
|
|
with utils.tempdir(dir=snapshot_directory) as tmpdir:
|
|
try:
|
|
out_path = os.path.join(tmpdir, snapshot_name)
|
|
if live_snapshot:
|
|
# NOTE (rmk): libvirt needs to be able to write to the
|
|
# temp directory, which is owned nova.
|
|
utils.execute('chmod', '777', tmpdir, run_as_root=True)
|
|
self._live_snapshot(virt_dom, disk_path, out_path,
|
|
image_format)
|
|
else:
|
|
snapshot_backend.snapshot_extract(out_path, image_format)
|
|
finally:
|
|
if not live_snapshot:
|
|
snapshot_backend.snapshot_delete()
|
|
# NOTE(dkang): because previous managedSave is not called
|
|
# for LXC, _create_domain must not be called.
|
|
if CONF.libvirt_type != 'lxc' and not live_snapshot:
|
|
if state == power_state.RUNNING:
|
|
self._create_domain(domain=virt_dom)
|
|
elif state == power_state.PAUSED:
|
|
self._create_domain(domain=virt_dom,
|
|
launch_flags=libvirt.VIR_DOMAIN_START_PAUSED)
|
|
LOG.info(_("Snapshot extracted, beginning image upload"),
|
|
instance=instance)
|
|
|
|
# Upload that image to the image service
|
|
|
|
update_task_state(task_state=task_states.IMAGE_UPLOADING,
|
|
expected_state=task_states.IMAGE_PENDING_UPLOAD)
|
|
with libvirt_utils.file_open(out_path) as image_file:
|
|
image_service.update(context,
|
|
image_href,
|
|
metadata,
|
|
image_file)
|
|
LOG.info(_("Snapshot image upload complete"),
|
|
instance=instance)
|
|
|
|
def _live_snapshot(self, domain, disk_path, out_path, image_format):
|
|
"""Snapshot an instance without downtime."""
|
|
# Save a copy of the domain's running XML file
|
|
xml = domain.XMLDesc(0)
|
|
|
|
# Abort is an idempotent operation, so make sure any block
|
|
# jobs which may have failed are ended.
|
|
try:
|
|
domain.blockJobAbort(disk_path, 0)
|
|
except Exception:
|
|
pass
|
|
|
|
def _wait_for_block_job(domain, disk_path):
|
|
status = domain.blockJobInfo(disk_path, 0)
|
|
try:
|
|
cur = status.get('cur', 0)
|
|
end = status.get('end', 0)
|
|
except Exception:
|
|
return False
|
|
|
|
if cur == end and cur != 0 and end != 0:
|
|
return False
|
|
else:
|
|
return True
|
|
|
|
# NOTE (rmk): We are using shallow rebases as a workaround to a bug
|
|
# in QEMU 1.3. In order to do this, we need to create
|
|
# a destination image with the original backing file
|
|
# and matching size of the instance root disk.
|
|
src_disk_size = libvirt_utils.get_disk_size(disk_path)
|
|
src_back_path = libvirt_utils.get_disk_backing_file(disk_path,
|
|
basename=False)
|
|
disk_delta = out_path + '.delta'
|
|
libvirt_utils.create_cow_image(src_back_path, disk_delta,
|
|
src_disk_size)
|
|
|
|
try:
|
|
# NOTE (rmk): blockRebase cannot be executed on persistent
|
|
# domains, so we need to temporarily undefine it.
|
|
# If any part of this block fails, the domain is
|
|
# re-defined regardless.
|
|
if domain.isPersistent():
|
|
domain.undefine()
|
|
|
|
# NOTE (rmk): Establish a temporary mirror of our root disk and
|
|
# issue an abort once we have a complete copy.
|
|
domain.blockRebase(disk_path, disk_delta, 0,
|
|
libvirt.VIR_DOMAIN_BLOCK_REBASE_COPY |
|
|
libvirt.VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT |
|
|
libvirt.VIR_DOMAIN_BLOCK_REBASE_SHALLOW)
|
|
|
|
while _wait_for_block_job(domain, disk_path):
|
|
time.sleep(0.5)
|
|
|
|
domain.blockJobAbort(disk_path, 0)
|
|
libvirt_utils.chown(disk_delta, os.getuid())
|
|
finally:
|
|
self._conn.defineXML(xml)
|
|
|
|
# Convert the delta (CoW) image with a backing file to a flat
|
|
# image with no backing file.
|
|
libvirt_utils.extract_snapshot(disk_delta, 'qcow2', None,
|
|
out_path, image_format)
|
|
|
|
def reboot(self, context, instance, network_info, reboot_type='SOFT',
|
|
block_device_info=None, bad_volumes_callback=None):
|
|
"""Reboot a virtual machine, given an instance reference."""
|
|
if reboot_type == 'SOFT':
|
|
# NOTE(vish): This will attempt to do a graceful shutdown/restart.
|
|
if self._soft_reboot(instance):
|
|
LOG.info(_("Instance soft rebooted successfully."),
|
|
instance=instance)
|
|
return
|
|
else:
|
|
LOG.warn(_("Failed to soft reboot instance."),
|
|
instance=instance)
|
|
return self._hard_reboot(context, instance, network_info,
|
|
block_device_info)
|
|
|
|
def _soft_reboot(self, instance):
|
|
"""Attempt to shutdown and restart the instance gracefully.
|
|
|
|
We use shutdown and create here so we can return if the guest
|
|
responded and actually rebooted. Note that this method only
|
|
succeeds if the guest responds to acpi. Therefore we return
|
|
success or failure so we can fall back to a hard reboot if
|
|
necessary.
|
|
|
|
:returns: True if the reboot succeeded
|
|
"""
|
|
dom = self._lookup_by_name(instance["name"])
|
|
(state, _max_mem, _mem, _cpus, _t) = dom.info()
|
|
state = LIBVIRT_POWER_STATE[state]
|
|
old_domid = dom.ID()
|
|
# NOTE(vish): This check allows us to reboot an instance that
|
|
# is already shutdown.
|
|
if state == power_state.RUNNING:
|
|
dom.shutdown()
|
|
# NOTE(vish): This actually could take slighty longer than the
|
|
# FLAG defines depending on how long the get_info
|
|
# call takes to return.
|
|
for x in xrange(CONF.libvirt_wait_soft_reboot_seconds):
|
|
dom = self._lookup_by_name(instance["name"])
|
|
(state, _max_mem, _mem, _cpus, _t) = dom.info()
|
|
state = LIBVIRT_POWER_STATE[state]
|
|
new_domid = dom.ID()
|
|
|
|
if state in [power_state.SHUTDOWN,
|
|
power_state.CRASHED]:
|
|
LOG.info(_("Instance shutdown successfully."),
|
|
instance=instance)
|
|
self._create_domain(domain=dom)
|
|
timer = utils.FixedIntervalLoopingCall(self._wait_for_running,
|
|
instance)
|
|
timer.start(interval=0.5).wait()
|
|
return True
|
|
elif old_domid != new_domid:
|
|
LOG.info(_("Instance may have been rebooted during soft "
|
|
"reboot, so return now."), instance=instance)
|
|
return True
|
|
greenthread.sleep(1)
|
|
return False
|
|
|
|
def _hard_reboot(self, context, instance, network_info,
|
|
block_device_info=None):
|
|
"""Reboot a virtual machine, given an instance reference.
|
|
|
|
Performs a Libvirt reset (if supported) on the domain.
|
|
|
|
If Libvirt reset is unavailable this method actually destroys and
|
|
re-creates the domain to ensure the reboot happens, as the guest
|
|
OS cannot ignore this action.
|
|
|
|
If xml is set, it uses the passed in xml in place of the xml from the
|
|
existing domain.
|
|
"""
|
|
|
|
self._destroy(instance)
|
|
disk_info = blockinfo.get_disk_info(CONF.libvirt_type,
|
|
instance,
|
|
block_device_info)
|
|
# NOTE(vish): This could generate the wrong device_format if we are
|
|
# using the raw backend and the images don't exist yet.
|
|
# The create_images_and_backing below doesn't properly
|
|
# regenerate raw backend images, however, so when it
|
|
# does we need to (re)generate the xml after the images
|
|
# are in place.
|
|
xml = self.to_xml(instance, network_info, disk_info,
|
|
block_device_info=block_device_info,
|
|
write_to_disk=True)
|
|
|
|
# NOTE (rmk): Re-populate any missing backing files.
|
|
disk_info_json = self.get_instance_disk_info(instance['name'], xml,
|
|
block_device_info)
|
|
self._create_images_and_backing(context, instance, disk_info_json)
|
|
|
|
# Initialize all the necessary networking, block devices and
|
|
# start the instance.
|
|
self._create_domain_and_network(xml, instance, network_info,
|
|
block_device_info)
|
|
|
|
def _wait_for_reboot():
|
|
"""Called at an interval until the VM is running again."""
|
|
state = self.get_info(instance)['state']
|
|
|
|
if state == power_state.RUNNING:
|
|
LOG.info(_("Instance rebooted successfully."),
|
|
instance=instance)
|
|
raise utils.LoopingCallDone()
|
|
|
|
timer = utils.FixedIntervalLoopingCall(_wait_for_reboot)
|
|
timer.start(interval=0.5).wait()
|
|
|
|
def pause(self, instance):
|
|
"""Pause VM instance."""
|
|
dom = self._lookup_by_name(instance['name'])
|
|
dom.suspend()
|
|
|
|
def unpause(self, instance):
|
|
"""Unpause paused VM instance."""
|
|
dom = self._lookup_by_name(instance['name'])
|
|
dom.resume()
|
|
|
|
def power_off(self, instance):
|
|
"""Power off the specified instance."""
|
|
self._destroy(instance)
|
|
|
|
def power_on(self, context, instance, network_info,
|
|
block_device_info=None):
|
|
"""Power on the specified instance."""
|
|
# We use _hard_reboot here to ensure that all backing files,
|
|
# network, and block device connections, etc. are established
|
|
# and available before we attempt to start the instance.
|
|
self._hard_reboot(context, instance, network_info, block_device_info)
|
|
|
|
def suspend(self, instance):
|
|
"""Suspend the specified instance."""
|
|
dom = self._lookup_by_name(instance['name'])
|
|
dom.managedSave(0)
|
|
|
|
def resume(self, instance, network_info, block_device_info=None):
|
|
"""resume the specified instance."""
|
|
xml = self._get_existing_domain_xml(instance, network_info,
|
|
block_device_info)
|
|
self._create_domain_and_network(xml, instance, network_info,
|
|
block_device_info)
|
|
|
|
def resume_state_on_host_boot(self, context, instance, network_info,
|
|
block_device_info=None):
|
|
"""resume guest state when a host is booted."""
|
|
# Check if the instance is running already and avoid doing
|
|
# anything if it is.
|
|
if self.instance_exists(instance['name']):
|
|
domain = self._lookup_by_name(instance['name'])
|
|
state = LIBVIRT_POWER_STATE[domain.info()[0]]
|
|
|
|
ignored_states = (power_state.RUNNING,
|
|
power_state.SUSPENDED,
|
|
power_state.NOSTATE,
|
|
power_state.PAUSED)
|
|
|
|
if state in ignored_states:
|
|
return
|
|
|
|
# Instance is not up and could be in an unknown state.
|
|
# Be as absolute as possible about getting it back into
|
|
# a known and running state.
|
|
self._hard_reboot(context, instance, network_info, block_device_info)
|
|
|
|
def rescue(self, context, instance, network_info, image_meta,
|
|
rescue_password):
|
|
"""Loads a VM using rescue images.
|
|
|
|
A rescue is normally performed when something goes wrong with the
|
|
primary images and data needs to be corrected/recovered. Rescuing
|
|
should not edit or over-ride the original image, only allow for
|
|
data recovery.
|
|
|
|
"""
|
|
instance_dir = libvirt_utils.get_instance_path(instance)
|
|
unrescue_xml = self._get_existing_domain_xml(instance, network_info)
|
|
unrescue_xml_path = os.path.join(instance_dir, 'unrescue.xml')
|
|
libvirt_utils.write_to_file(unrescue_xml_path, unrescue_xml)
|
|
|
|
rescue_images = {
|
|
'image_id': CONF.rescue_image_id or instance['image_ref'],
|
|
'kernel_id': CONF.rescue_kernel_id or instance['kernel_id'],
|
|
'ramdisk_id': CONF.rescue_ramdisk_id or instance['ramdisk_id'],
|
|
}
|
|
disk_info = blockinfo.get_disk_info(CONF.libvirt_type,
|
|
instance,
|
|
None,
|
|
image_meta,
|
|
rescue=True)
|
|
self._create_image(context, instance,
|
|
disk_info['mapping'],
|
|
'.rescue', rescue_images,
|
|
network_info=network_info,
|
|
admin_pass=rescue_password)
|
|
xml = self.to_xml(instance, network_info, disk_info,
|
|
image_meta, rescue=rescue_images,
|
|
write_to_disk=True)
|
|
self._destroy(instance)
|
|
self._create_domain(xml)
|
|
|
|
def unrescue(self, instance, network_info):
|
|
"""Reboot the VM which is being rescued back into primary images.
|
|
"""
|
|
instance_dir = libvirt_utils.get_instance_path(instance)
|
|
unrescue_xml_path = os.path.join(instance_dir, 'unrescue.xml')
|
|
xml = libvirt_utils.load_file(unrescue_xml_path)
|
|
virt_dom = self._lookup_by_name(instance['name'])
|
|
self._destroy(instance)
|
|
self._create_domain(xml, virt_dom)
|
|
libvirt_utils.file_delete(unrescue_xml_path)
|
|
rescue_files = os.path.join(instance_dir, "*.rescue")
|
|
for rescue_file in glob.iglob(rescue_files):
|
|
libvirt_utils.file_delete(rescue_file)
|
|
|
|
def poll_rebooting_instances(self, timeout, instances):
|
|
pass
|
|
|
|
def _enable_hairpin(self, xml):
|
|
interfaces = self.get_interfaces(xml)
|
|
for interface in interfaces:
|
|
utils.execute('tee',
|
|
'/sys/class/net/%s/brport/hairpin_mode' % interface,
|
|
process_input='1',
|
|
run_as_root=True,
|
|
check_exit_code=[0, 1])
|
|
|
|
# NOTE(ilyaalekseyev): Implementation like in multinics
|
|
# for xenapi(tr3buchet)
|
|
def spawn(self, context, instance, image_meta, injected_files,
|
|
admin_password, network_info=None, block_device_info=None):
|
|
disk_info = blockinfo.get_disk_info(CONF.libvirt_type,
|
|
instance,
|
|
block_device_info,
|
|
image_meta)
|
|
self._create_image(context, instance,
|
|
disk_info['mapping'],
|
|
network_info=network_info,
|
|
block_device_info=block_device_info,
|
|
files=injected_files,
|
|
admin_pass=admin_password)
|
|
xml = self.to_xml(instance, network_info,
|
|
disk_info, image_meta,
|
|
block_device_info=block_device_info,
|
|
write_to_disk=True)
|
|
|
|
self._create_domain_and_network(xml, instance, network_info,
|
|
block_device_info)
|
|
LOG.debug(_("Instance is running"), instance=instance)
|
|
|
|
def _wait_for_boot():
|
|
"""Called at an interval until the VM is running."""
|
|
state = self.get_info(instance)['state']
|
|
|
|
if state == power_state.RUNNING:
|
|
LOG.info(_("Instance spawned successfully."),
|
|
instance=instance)
|
|
raise utils.LoopingCallDone()
|
|
|
|
timer = utils.FixedIntervalLoopingCall(_wait_for_boot)
|
|
timer.start(interval=0.5).wait()
|
|
|
|
def _flush_libvirt_console(self, pty):
|
|
out, err = utils.execute('dd',
|
|
'if=%s' % pty,
|
|
'iflag=nonblock',
|
|
run_as_root=True,
|
|
check_exit_code=False)
|
|
return out
|
|
|
|
def _append_to_file(self, data, fpath):
|
|
LOG.info(_('data: %(data)r, fpath: %(fpath)r') % locals())
|
|
fp = open(fpath, 'a+')
|
|
fp.write(data)
|
|
return fpath
|
|
|
|
def get_console_output(self, instance):
|
|
virt_dom = self._lookup_by_name(instance['name'])
|
|
xml = virt_dom.XMLDesc(0)
|
|
tree = etree.fromstring(xml)
|
|
|
|
console_types = {}
|
|
|
|
# NOTE(comstud): We want to try 'file' types first, then try 'pty'
|
|
# types. We can't use Python 2.7 syntax of:
|
|
# tree.find("./devices/console[@type='file']/source")
|
|
# because we need to support 2.6.
|
|
console_nodes = tree.findall('./devices/console')
|
|
for console_node in console_nodes:
|
|
console_type = console_node.get('type')
|
|
console_types.setdefault(console_type, [])
|
|
console_types[console_type].append(console_node)
|
|
|
|
# If the guest has a console logging to a file prefer to use that
|
|
if console_types.get('file'):
|
|
for file_console in console_types.get('file'):
|
|
source_node = file_console.find('./source')
|
|
if source_node is None:
|
|
continue
|
|
path = source_node.get("path")
|
|
if not path:
|
|
continue
|
|
libvirt_utils.chown(path, os.getuid())
|
|
|
|
with libvirt_utils.file_open(path, 'rb') as fp:
|
|
log_data, remaining = utils.last_bytes(fp,
|
|
MAX_CONSOLE_BYTES)
|
|
if remaining > 0:
|
|
LOG.info(_('Truncated console log returned, %d bytes '
|
|
'ignored'), remaining, instance=instance)
|
|
return log_data
|
|
|
|
# Try 'pty' types
|
|
if console_types.get('pty'):
|
|
for pty_console in console_types.get('pty'):
|
|
source_node = pty_console.find('./source')
|
|
if source_node is None:
|
|
continue
|
|
pty = source_node.get("path")
|
|
if not pty:
|
|
continue
|
|
break
|
|
else:
|
|
msg = _("Guest does not have a console available")
|
|
raise exception.NovaException(msg)
|
|
|
|
self._chown_console_log_for_instance(instance)
|
|
data = self._flush_libvirt_console(pty)
|
|
console_log = self._get_console_log_path(instance)
|
|
fpath = self._append_to_file(data, console_log)
|
|
|
|
with libvirt_utils.file_open(fpath, 'rb') as fp:
|
|
log_data, remaining = utils.last_bytes(fp, MAX_CONSOLE_BYTES)
|
|
if remaining > 0:
|
|
LOG.info(_('Truncated console log returned, %d bytes ignored'),
|
|
remaining, instance=instance)
|
|
return log_data
|
|
|
|
@staticmethod
|
|
def get_host_ip_addr():
|
|
return CONF.my_ip
|
|
|
|
def get_vnc_console(self, instance):
|
|
def get_vnc_port_for_instance(instance_name):
|
|
virt_dom = self._lookup_by_name(instance_name)
|
|
xml = virt_dom.XMLDesc(0)
|
|
dom = xmlutils.safe_minidom_parse_string(xml)
|
|
|
|
for graphic in dom.getElementsByTagName('graphics'):
|
|
if graphic.getAttribute('type') == 'vnc':
|
|
return graphic.getAttribute('port')
|
|
|
|
port = get_vnc_port_for_instance(instance['name'])
|
|
host = CONF.vncserver_proxyclient_address
|
|
|
|
return {'host': host, 'port': port, 'internal_access_path': None}
|
|
|
|
@exception.wrap_exception()
|
|
def get_spice_console(self, instance):
|
|
def get_spice_ports_for_instance(instance_name):
|
|
virt_dom = self._lookup_by_name(instance_name)
|
|
xml = virt_dom.XMLDesc(0)
|
|
# TODO(sleepsonthefloor): use etree instead of minidom
|
|
dom = xmlutils.safe_minidom_parse_string(xml)
|
|
|
|
for graphic in dom.getElementsByTagName('graphics'):
|
|
if graphic.getAttribute('type') == 'spice':
|
|
return (graphic.getAttribute('port'),
|
|
graphic.getAttribute('tlsPort'))
|
|
|
|
return (None, None)
|
|
|
|
ports = get_spice_ports_for_instance(instance['name'])
|
|
host = CONF.spice.server_proxyclient_address
|
|
|
|
return {'host': host, 'port': ports[0],
|
|
'tlsPort': ports[1], 'internal_access_path': None}
|
|
|
|
@staticmethod
|
|
def _supports_direct_io(dirpath):
|
|
|
|
if not hasattr(os, 'O_DIRECT'):
|
|
LOG.debug("This python runtime does not support direct I/O")
|
|
return False
|
|
|
|
testfile = os.path.join(dirpath, ".directio.test")
|
|
|
|
hasDirectIO = True
|
|
try:
|
|
f = os.open(testfile, os.O_CREAT | os.O_WRONLY | os.O_DIRECT)
|
|
os.close(f)
|
|
LOG.debug(_("Path '%(path)s' supports direct I/O") %
|
|
{'path': dirpath})
|
|
except OSError, e:
|
|
if e.errno == errno.EINVAL:
|
|
LOG.debug(_("Path '%(path)s' does not support direct I/O: "
|
|
"'%(ex)s'") % {'path': dirpath, 'ex': str(e)})
|
|
hasDirectIO = False
|
|
else:
|
|
with excutils.save_and_reraise_exception():
|
|
LOG.error(_("Error on '%(path)s' while checking "
|
|
"direct I/O: '%(ex)s'") %
|
|
{'path': dirpath, 'ex': str(e)})
|
|
except Exception, e:
|
|
with excutils.save_and_reraise_exception():
|
|
LOG.error(_("Error on '%(path)s' while checking direct I/O: "
|
|
"'%(ex)s'") % {'path': dirpath, 'ex': str(e)})
|
|
finally:
|
|
try:
|
|
os.unlink(testfile)
|
|
except Exception:
|
|
pass
|
|
|
|
return hasDirectIO
|
|
|
|
@staticmethod
|
|
def _create_local(target, local_size, unit='G',
|
|
fs_format=None, label=None):
|
|
"""Create a blank image of specified size."""
|
|
|
|
if not fs_format:
|
|
fs_format = CONF.default_ephemeral_format
|
|
|
|
if not CONF.libvirt_images_type == "lvm":
|
|
libvirt_utils.create_image('raw', target,
|
|
'%d%c' % (local_size, unit))
|
|
if fs_format:
|
|
utils.mkfs(fs_format, target, label)
|
|
|
|
def _create_ephemeral(self, target, ephemeral_size, fs_label, os_type):
|
|
self._create_local(target, ephemeral_size)
|
|
disk.mkfs(os_type, fs_label, target)
|
|
|
|
@staticmethod
|
|
def _create_swap(target, swap_mb):
|
|
"""Create a swap file of specified size."""
|
|
libvirt_utils.create_image('raw', target, '%dM' % swap_mb)
|
|
utils.mkfs('swap', target)
|
|
|
|
@staticmethod
|
|
def _get_console_log_path(instance):
|
|
return os.path.join(libvirt_utils.get_instance_path(instance),
|
|
'console.log')
|
|
|
|
def _chown_console_log_for_instance(self, instance):
|
|
console_log = self._get_console_log_path(instance)
|
|
if os.path.exists(console_log):
|
|
libvirt_utils.chown(console_log, os.getuid())
|
|
|
|
def _create_image(self, context, instance,
|
|
disk_mapping, suffix='',
|
|
disk_images=None, network_info=None,
|
|
block_device_info=None, files=None, admin_pass=None):
|
|
if not suffix:
|
|
suffix = ''
|
|
|
|
booted_from_volume = (
|
|
(not bool(instance.get('image_ref')))
|
|
or 'disk' not in disk_mapping
|
|
)
|
|
|
|
# syntactic nicety
|
|
def basepath(fname='', suffix=suffix):
|
|
return os.path.join(libvirt_utils.get_instance_path(instance),
|
|
fname + suffix)
|
|
|
|
def image(fname, image_type=CONF.libvirt_images_type):
|
|
return self.image_backend.image(instance,
|
|
fname + suffix, image_type)
|
|
|
|
def raw(fname):
|
|
return image(fname, image_type='raw')
|
|
|
|
# ensure directories exist and are writable
|
|
fileutils.ensure_tree(basepath(suffix=''))
|
|
|
|
LOG.info(_('Creating image'), instance=instance)
|
|
|
|
# NOTE(dprince): for rescue console.log may already exist... chown it.
|
|
self._chown_console_log_for_instance(instance)
|
|
|
|
# NOTE(vish): No need add the suffix to console.log
|
|
libvirt_utils.write_to_file(
|
|
self._get_console_log_path(instance), '', 007)
|
|
|
|
if not disk_images:
|
|
disk_images = {'image_id': instance['image_ref'],
|
|
'kernel_id': instance['kernel_id'],
|
|
'ramdisk_id': instance['ramdisk_id']}
|
|
|
|
if disk_images['kernel_id']:
|
|
fname = imagecache.get_cache_fname(disk_images, 'kernel_id')
|
|
raw('kernel').cache(fetch_func=libvirt_utils.fetch_image,
|
|
context=context,
|
|
filename=fname,
|
|
image_id=disk_images['kernel_id'],
|
|
user_id=instance['user_id'],
|
|
project_id=instance['project_id'])
|
|
if disk_images['ramdisk_id']:
|
|
fname = imagecache.get_cache_fname(disk_images, 'ramdisk_id')
|
|
raw('ramdisk').cache(fetch_func=libvirt_utils.fetch_image,
|
|
context=context,
|
|
filename=fname,
|
|
image_id=disk_images['ramdisk_id'],
|
|
user_id=instance['user_id'],
|
|
project_id=instance['project_id'])
|
|
|
|
inst_type = instance_types.extract_instance_type(instance)
|
|
|
|
# NOTE(ndipanov): Even if disk_mapping was passed in, which
|
|
# currently happens only on rescue - we still don't want to
|
|
# create a base image.
|
|
if not booted_from_volume:
|
|
root_fname = imagecache.get_cache_fname(disk_images, 'image_id')
|
|
size = instance['root_gb'] * 1024 * 1024 * 1024
|
|
|
|
if size == 0 or suffix == '.rescue':
|
|
size = None
|
|
|
|
image('disk').cache(fetch_func=libvirt_utils.fetch_image,
|
|
context=context,
|
|
filename=root_fname,
|
|
size=size,
|
|
image_id=disk_images['image_id'],
|
|
user_id=instance['user_id'],
|
|
project_id=instance['project_id'])
|
|
|
|
# Lookup the filesystem type if required
|
|
os_type_with_default = instance['os_type']
|
|
if not os_type_with_default:
|
|
os_type_with_default = 'default'
|
|
|
|
ephemeral_gb = instance['ephemeral_gb']
|
|
if 'disk.local' in disk_mapping:
|
|
fn = functools.partial(self._create_ephemeral,
|
|
fs_label='ephemeral0',
|
|
os_type=instance["os_type"])
|
|
fname = "ephemeral_%s_%s" % (ephemeral_gb, os_type_with_default)
|
|
size = ephemeral_gb * 1024 * 1024 * 1024
|
|
image('disk.local').cache(fetch_func=fn,
|
|
filename=fname,
|
|
size=size,
|
|
ephemeral_size=ephemeral_gb)
|
|
|
|
for eph in driver.block_device_info_get_ephemerals(block_device_info):
|
|
fn = functools.partial(self._create_ephemeral,
|
|
fs_label='ephemeral%d' % eph['num'],
|
|
os_type=instance["os_type"])
|
|
size = eph['size'] * 1024 * 1024 * 1024
|
|
fname = "ephemeral_%s_%s" % (eph['size'], os_type_with_default)
|
|
image(blockinfo.get_eph_disk(eph)).cache(
|
|
fetch_func=fn,
|
|
filename=fname,
|
|
size=size,
|
|
ephemeral_size=eph['size'])
|
|
|
|
if 'disk.swap' in disk_mapping:
|
|
mapping = disk_mapping['disk.swap']
|
|
swap_mb = 0
|
|
|
|
swap = driver.block_device_info_get_swap(block_device_info)
|
|
if driver.swap_is_usable(swap):
|
|
swap_mb = swap['swap_size']
|
|
elif (inst_type['swap'] > 0 and
|
|
not block_device.volume_in_mapping(
|
|
mapping['dev'], block_device_info)):
|
|
swap_mb = inst_type['swap']
|
|
|
|
if swap_mb > 0:
|
|
size = swap_mb * 1024 * 1024
|
|
image('disk.swap').cache(fetch_func=self._create_swap,
|
|
filename="swap_%s" % swap_mb,
|
|
size=size,
|
|
swap_mb=swap_mb)
|
|
|
|
# Config drive
|
|
if configdrive.required_by(instance):
|
|
LOG.info(_('Using config drive'), instance=instance)
|
|
extra_md = {}
|
|
if admin_pass:
|
|
extra_md['admin_pass'] = admin_pass
|
|
|
|
inst_md = instance_metadata.InstanceMetadata(instance,
|
|
content=files, extra_md=extra_md)
|
|
with configdrive.ConfigDriveBuilder(instance_md=inst_md) as cdb:
|
|
configdrive_path = basepath(fname='disk.config')
|
|
LOG.info(_('Creating config drive at %(path)s'),
|
|
{'path': configdrive_path}, instance=instance)
|
|
|
|
try:
|
|
cdb.make_drive(configdrive_path)
|
|
except exception.ProcessExecutionError, e:
|
|
with excutils.save_and_reraise_exception():
|
|
LOG.error(_('Creating config drive failed '
|
|
'with error: %s'),
|
|
e, instance=instance)
|
|
|
|
# File injection
|
|
elif CONF.libvirt_inject_partition != -2:
|
|
target_partition = None
|
|
if not instance['kernel_id']:
|
|
target_partition = CONF.libvirt_inject_partition
|
|
if target_partition == 0:
|
|
target_partition = None
|
|
if CONF.libvirt_type == 'lxc':
|
|
target_partition = None
|
|
|
|
if CONF.libvirt_inject_key and instance['key_data']:
|
|
key = str(instance['key_data'])
|
|
else:
|
|
key = None
|
|
|
|
net = netutils.get_injected_network_template(network_info)
|
|
|
|
metadata = instance.get('metadata')
|
|
|
|
if not CONF.libvirt_inject_password:
|
|
admin_pass = None
|
|
|
|
if any((key, net, metadata, admin_pass, files)):
|
|
# If we're not using config_drive, inject into root fs
|
|
injection_path = image('disk').path
|
|
img_id = instance['image_ref']
|
|
|
|
for inj in ('key', 'net', 'metadata', 'admin_pass', 'files'):
|
|
if locals()[inj]:
|
|
LOG.info(_('Injecting %(inj)s into image '
|
|
'%(img_id)s'), locals(), instance=instance)
|
|
try:
|
|
disk.inject_data(injection_path,
|
|
key, net, metadata, admin_pass, files,
|
|
partition=target_partition,
|
|
use_cow=CONF.use_cow_images,
|
|
mandatory=('files',))
|
|
except Exception as e:
|
|
with excutils.save_and_reraise_exception():
|
|
LOG.error(_('Error injecting data into image '
|
|
'%(img_id)s (%(e)s)') % locals(),
|
|
instance=instance)
|
|
|
|
if CONF.libvirt_type == 'uml':
|
|
libvirt_utils.chown(image('disk').path, 'root')
|
|
|
|
def get_host_capabilities(self):
|
|
"""Returns an instance of config.LibvirtConfigCaps representing
|
|
the capabilities of the host"""
|
|
if not self._caps:
|
|
xmlstr = self._conn.getCapabilities()
|
|
self._caps = vconfig.LibvirtConfigCaps()
|
|
self._caps.parse_str(xmlstr)
|
|
return self._caps
|
|
|
|
def get_host_uuid(self):
|
|
"""Returns a UUID representing the host."""
|
|
caps = self.get_host_capabilities()
|
|
return caps.host.uuid
|
|
|
|
def get_host_cpu_for_guest(self):
|
|
"""Returns an instance of config.LibvirtConfigGuestCPU
|
|
representing the host's CPU model & topology with
|
|
policy for configuring a guest to match"""
|
|
|
|
caps = self.get_host_capabilities()
|
|
hostcpu = caps.host.cpu
|
|
guestcpu = vconfig.LibvirtConfigGuestCPU()
|
|
|
|
guestcpu.model = hostcpu.model
|
|
guestcpu.vendor = hostcpu.vendor
|
|
guestcpu.arch = hostcpu.arch
|
|
|
|
guestcpu.match = "exact"
|
|
|
|
for hostfeat in hostcpu.features:
|
|
guestfeat = vconfig.LibvirtConfigGuestCPUFeature(hostfeat.name)
|
|
guestfeat.policy = "require"
|
|
guestcpu.features.append(guestfeat)
|
|
|
|
return guestcpu
|
|
|
|
def get_guest_cpu_config(self):
|
|
mode = CONF.libvirt_cpu_mode
|
|
model = CONF.libvirt_cpu_model
|
|
|
|
if mode is None:
|
|
if CONF.libvirt_type == "kvm" or CONF.libvirt_type == "qemu":
|
|
mode = "host-model"
|
|
else:
|
|
mode = "none"
|
|
|
|
if mode == "none":
|
|
return None
|
|
|
|
if CONF.libvirt_type != "kvm" and CONF.libvirt_type != "qemu":
|
|
msg = _("Config requested an explicit CPU model, but "
|
|
"the current libvirt hypervisor '%s' does not "
|
|
"support selecting CPU models") % CONF.libvirt_type
|
|
raise exception.Invalid(msg)
|
|
|
|
if mode == "custom" and model is None:
|
|
msg = _("Config requested a custom CPU model, but no "
|
|
"model name was provided")
|
|
raise exception.Invalid(msg)
|
|
elif mode != "custom" and model is not None:
|
|
msg = _("A CPU model name should not be set when a "
|
|
"host CPU model is requested")
|
|
raise exception.Invalid(msg)
|
|
|
|
LOG.debug(_("CPU mode '%(mode)s' model '%(model)s' was chosen")
|
|
% {'mode': mode, 'model': (model or "")})
|
|
|
|
# TODO(berrange): in the future, when MIN_LIBVIRT_VERSION is
|
|
# updated to be at least this new, we can kill off the elif
|
|
# blocks here
|
|
if self.has_min_version(MIN_LIBVIRT_HOST_CPU_VERSION):
|
|
cpu = vconfig.LibvirtConfigGuestCPU()
|
|
cpu.mode = mode
|
|
cpu.model = model
|
|
elif mode == "custom":
|
|
cpu = vconfig.LibvirtConfigGuestCPU()
|
|
cpu.model = model
|
|
elif mode == "host-model":
|
|
cpu = self.get_host_cpu_for_guest()
|
|
elif mode == "host-passthrough":
|
|
msg = _("Passthrough of the host CPU was requested but "
|
|
"this libvirt version does not support this feature")
|
|
raise exception.NovaException(msg)
|
|
|
|
return cpu
|
|
|
|
def get_guest_disk_config(self, instance, name, disk_mapping, inst_type,
|
|
image_type=None):
|
|
image = self.image_backend.image(instance,
|
|
name,
|
|
image_type)
|
|
disk_info = disk_mapping[name]
|
|
return image.libvirt_info(disk_info['bus'],
|
|
disk_info['dev'],
|
|
disk_info['type'],
|
|
self.disk_cachemode,
|
|
inst_type['extra_specs'])
|
|
|
|
def get_guest_storage_config(self, instance, image_meta,
|
|
disk_info,
|
|
rescue, block_device_info,
|
|
inst_type):
|
|
devices = []
|
|
disk_mapping = disk_info['mapping']
|
|
|
|
block_device_mapping = driver.block_device_info_get_mapping(
|
|
block_device_info)
|
|
|
|
if CONF.libvirt_type == "lxc":
|
|
fs = vconfig.LibvirtConfigGuestFilesys()
|
|
fs.source_type = "mount"
|
|
fs.source_dir = os.path.join(
|
|
libvirt_utils.get_instance_path(instance), 'rootfs')
|
|
devices.append(fs)
|
|
else:
|
|
|
|
if rescue:
|
|
diskrescue = self.get_guest_disk_config(instance,
|
|
'disk.rescue',
|
|
disk_mapping,
|
|
inst_type)
|
|
devices.append(diskrescue)
|
|
|
|
diskos = self.get_guest_disk_config(instance,
|
|
'disk',
|
|
disk_mapping,
|
|
inst_type)
|
|
devices.append(diskos)
|
|
else:
|
|
if 'disk' in disk_mapping:
|
|
diskos = self.get_guest_disk_config(instance,
|
|
'disk',
|
|
disk_mapping,
|
|
inst_type)
|
|
devices.append(diskos)
|
|
|
|
if 'disk.local' in disk_mapping:
|
|
disklocal = self.get_guest_disk_config(instance,
|
|
'disk.local',
|
|
disk_mapping,
|
|
inst_type)
|
|
devices.append(disklocal)
|
|
self.virtapi.instance_update(
|
|
nova_context.get_admin_context(), instance['uuid'],
|
|
{'default_ephemeral_device':
|
|
'/dev/' + disklocal.target_dev})
|
|
|
|
for eph in driver.block_device_info_get_ephemerals(
|
|
block_device_info):
|
|
diskeph = self.get_guest_disk_config(
|
|
instance,
|
|
blockinfo.get_eph_disk(eph),
|
|
disk_mapping, inst_type)
|
|
devices.append(diskeph)
|
|
|
|
if 'disk.swap' in disk_mapping:
|
|
diskswap = self.get_guest_disk_config(instance,
|
|
'disk.swap',
|
|
disk_mapping,
|
|
inst_type)
|
|
devices.append(diskswap)
|
|
self.virtapi.instance_update(
|
|
nova_context.get_admin_context(), instance['uuid'],
|
|
{'default_swap_device': '/dev/' + diskswap.target_dev})
|
|
|
|
for vol in block_device_mapping:
|
|
connection_info = vol['connection_info']
|
|
info = disk_mapping[vol['mount_device']]
|
|
cfg = self.volume_driver_method('connect_volume',
|
|
connection_info,
|
|
info)
|
|
devices.append(cfg)
|
|
|
|
if 'disk.config' in disk_mapping:
|
|
diskconfig = self.get_guest_disk_config(instance,
|
|
'disk.config',
|
|
disk_mapping,
|
|
inst_type,
|
|
'raw')
|
|
devices.append(diskconfig)
|
|
|
|
for d in devices:
|
|
self.set_cache_mode(d)
|
|
|
|
return devices
|
|
|
|
def get_guest_config_sysinfo(self, instance):
|
|
sysinfo = vconfig.LibvirtConfigGuestSysinfo()
|
|
|
|
sysinfo.system_manufacturer = version.vendor_string()
|
|
sysinfo.system_product = version.product_string()
|
|
sysinfo.system_version = version.version_string_with_package()
|
|
|
|
sysinfo.system_serial = self.get_host_uuid()
|
|
sysinfo.system_uuid = instance['uuid']
|
|
|
|
return sysinfo
|
|
|
|
def get_guest_config(self, instance, network_info, image_meta,
|
|
disk_info, rescue=None, block_device_info=None):
|
|
"""Get config data for parameters.
|
|
|
|
:param rescue: optional dictionary that should contain the key
|
|
'ramdisk_id' if a ramdisk is needed for the rescue image and
|
|
'kernel_id' if a kernel is needed for the rescue image.
|
|
"""
|
|
|
|
inst_type = self.virtapi.instance_type_get(
|
|
nova_context.get_admin_context(read_deleted='yes'),
|
|
instance['instance_type_id'])
|
|
inst_path = libvirt_utils.get_instance_path(instance)
|
|
disk_mapping = disk_info['mapping']
|
|
|
|
CONSOLE = "console=tty0 console=ttyS0"
|
|
|
|
guest = vconfig.LibvirtConfigGuest()
|
|
guest.virt_type = CONF.libvirt_type
|
|
guest.name = instance['name']
|
|
guest.uuid = instance['uuid']
|
|
guest.memory = inst_type['memory_mb'] * 1024
|
|
guest.vcpus = inst_type['vcpus']
|
|
|
|
quota_items = ['cpu_shares', 'cpu_period', 'cpu_quota']
|
|
for key, value in inst_type['extra_specs'].iteritems():
|
|
scope = key.split(':')
|
|
if len(scope) > 1 and scope[0] == 'quota':
|
|
if scope[1] in quota_items:
|
|
setattr(guest, scope[1], value)
|
|
|
|
guest.cpu = self.get_guest_cpu_config()
|
|
|
|
if 'root' in disk_mapping and disk_mapping['root']['dev'] is not None:
|
|
root_device_name = "/dev/" + disk_mapping['root']['dev']
|
|
else:
|
|
root_device_name = None
|
|
|
|
if root_device_name:
|
|
# NOTE(yamahata):
|
|
# for nova.api.ec2.cloud.CloudController.get_metadata()
|
|
self.virtapi.instance_update(
|
|
nova_context.get_admin_context(), instance['uuid'],
|
|
{'root_device_name': root_device_name})
|
|
|
|
guest.os_type = vm_mode.get_from_instance(instance)
|
|
|
|
if guest.os_type is None:
|
|
if CONF.libvirt_type == "lxc":
|
|
guest.os_type = vm_mode.EXE
|
|
elif CONF.libvirt_type == "uml":
|
|
guest.os_type = vm_mode.UML
|
|
elif CONF.libvirt_type == "xen":
|
|
guest.os_type = vm_mode.XEN
|
|
else:
|
|
guest.os_type = vm_mode.HVM
|
|
|
|
if CONF.libvirt_type == "xen" and guest.os_type == vm_mode.HVM:
|
|
guest.os_loader = CONF.xen_hvmloader_path
|
|
|
|
if CONF.libvirt_type in ("kvm", "qemu"):
|
|
caps = self.get_host_capabilities()
|
|
if caps.host.cpu.arch in ("i686", "x86_64"):
|
|
guest.sysinfo = self.get_guest_config_sysinfo(instance)
|
|
guest.os_smbios = vconfig.LibvirtConfigGuestSMBIOS()
|
|
|
|
if CONF.libvirt_type == "lxc":
|
|
guest.os_type = vm_mode.EXE
|
|
guest.os_init_path = "/sbin/init"
|
|
guest.os_cmdline = CONSOLE
|
|
elif CONF.libvirt_type == "uml":
|
|
guest.os_type = vm_mode.UML
|
|
guest.os_kernel = "/usr/bin/linux"
|
|
guest.os_root = root_device_name
|
|
else:
|
|
if CONF.libvirt_type == "xen" and guest.os_type == vm_mode.XEN:
|
|
guest.os_root = root_device_name
|
|
else:
|
|
guest.os_type = vm_mode.HVM
|
|
|
|
if rescue:
|
|
if rescue.get('kernel_id'):
|
|
guest.os_kernel = os.path.join(inst_path, "kernel.rescue")
|
|
if CONF.libvirt_type == "xen":
|
|
guest.os_cmdline = "ro"
|
|
else:
|
|
guest.os_cmdline = ("root=%s %s" % (root_device_name,
|
|
CONSOLE))
|
|
|
|
if rescue.get('ramdisk_id'):
|
|
guest.os_initrd = os.path.join(inst_path, "ramdisk.rescue")
|
|
elif instance['kernel_id']:
|
|
guest.os_kernel = os.path.join(inst_path, "kernel")
|
|
if CONF.libvirt_type == "xen":
|
|
guest.os_cmdline = "ro"
|
|
else:
|
|
guest.os_cmdline = ("root=%s %s" % (root_device_name,
|
|
CONSOLE))
|
|
if instance['ramdisk_id']:
|
|
guest.os_initrd = os.path.join(inst_path, "ramdisk")
|
|
else:
|
|
guest.os_boot_dev = "hd"
|
|
|
|
if CONF.libvirt_type != "lxc" and CONF.libvirt_type != "uml":
|
|
guest.acpi = True
|
|
guest.apic = True
|
|
|
|
clk = vconfig.LibvirtConfigGuestClock()
|
|
clk.offset = "utc"
|
|
guest.set_clock(clk)
|
|
|
|
if CONF.libvirt_type == "kvm":
|
|
# TODO(berrange) One day this should be per-guest
|
|
# OS type configurable
|
|
tmpit = vconfig.LibvirtConfigGuestTimer()
|
|
tmpit.name = "pit"
|
|
tmpit.tickpolicy = "delay"
|
|
|
|
tmrtc = vconfig.LibvirtConfigGuestTimer()
|
|
tmrtc.name = "rtc"
|
|
tmrtc.tickpolicy = "catchup"
|
|
|
|
clk.add_timer(tmpit)
|
|
clk.add_timer(tmrtc)
|
|
|
|
for cfg in self.get_guest_storage_config(instance,
|
|
image_meta,
|
|
disk_info,
|
|
rescue,
|
|
block_device_info,
|
|
inst_type):
|
|
guest.add_device(cfg)
|
|
|
|
for (network, mapping) in network_info:
|
|
cfg = self.vif_driver.get_config(instance,
|
|
network, mapping,
|
|
image_meta,
|
|
inst_type)
|
|
guest.add_device(cfg)
|
|
|
|
if CONF.libvirt_type == "qemu" or CONF.libvirt_type == "kvm":
|
|
# The QEMU 'pty' driver throws away any data if no
|
|
# client app is connected. Thus we can't get away
|
|
# with a single type=pty console. Instead we have
|
|
# to configure two separate consoles.
|
|
consolelog = vconfig.LibvirtConfigGuestSerial()
|
|
consolelog.type = "file"
|
|
consolelog.source_path = self._get_console_log_path(instance)
|
|
guest.add_device(consolelog)
|
|
|
|
consolepty = vconfig.LibvirtConfigGuestSerial()
|
|
consolepty.type = "pty"
|
|
guest.add_device(consolepty)
|
|
else:
|
|
consolepty = vconfig.LibvirtConfigGuestConsole()
|
|
consolepty.type = "pty"
|
|
guest.add_device(consolepty)
|
|
|
|
# We want a tablet if VNC is enabled,
|
|
# or SPICE is enabled and the SPICE agent is disabled
|
|
# NB: this implies that if both SPICE + VNC are enabled
|
|
# at the same time, we'll get the tablet whether the
|
|
# SPICE agent is used or not.
|
|
need_usb_tablet = False
|
|
if CONF.vnc_enabled:
|
|
need_usb_tablet = CONF.use_usb_tablet
|
|
elif CONF.spice.enabled and not CONF.spice.agent_enabled:
|
|
need_usb_tablet = CONF.use_usb_tablet
|
|
|
|
if need_usb_tablet and guest.os_type == vm_mode.HVM:
|
|
tablet = vconfig.LibvirtConfigGuestInput()
|
|
tablet.type = "tablet"
|
|
tablet.bus = "usb"
|
|
guest.add_device(tablet)
|
|
|
|
if CONF.spice.enabled and CONF.spice.agent_enabled and \
|
|
CONF.libvirt_type not in ('lxc', 'uml', 'xen'):
|
|
channel = vconfig.LibvirtConfigGuestChannel()
|
|
channel.target_name = "com.redhat.spice.0"
|
|
guest.add_device(channel)
|
|
|
|
# NB some versions of libvirt support both SPICE and VNC
|
|
# at the same time. We're not trying to second guess which
|
|
# those versions are. We'll just let libvirt report the
|
|
# errors appropriately if the user enables both.
|
|
|
|
if CONF.vnc_enabled and CONF.libvirt_type not in ('lxc', 'uml'):
|
|
graphics = vconfig.LibvirtConfigGuestGraphics()
|
|
graphics.type = "vnc"
|
|
graphics.keymap = CONF.vnc_keymap
|
|
graphics.listen = CONF.vncserver_listen
|
|
guest.add_device(graphics)
|
|
|
|
if CONF.spice.enabled and \
|
|
CONF.libvirt_type not in ('lxc', 'uml', 'xen'):
|
|
graphics = vconfig.LibvirtConfigGuestGraphics()
|
|
graphics.type = "spice"
|
|
graphics.keymap = CONF.spice.keymap
|
|
graphics.listen = CONF.spice.server_listen
|
|
guest.add_device(graphics)
|
|
|
|
return guest
|
|
|
|
def to_xml(self, instance, network_info, disk_info,
|
|
image_meta=None, rescue=None,
|
|
block_device_info=None, write_to_disk=False):
|
|
LOG.debug(_("Start to_xml instance=%(instance)s "
|
|
"network_info=%(network_info)s "
|
|
"disk_info=%(disk_info)s "
|
|
"image_meta=%(image_meta)s rescue=%(rescue)s"
|
|
"block_device_info=%(block_device_info)s") %
|
|
locals())
|
|
conf = self.get_guest_config(instance, network_info, image_meta,
|
|
disk_info, rescue, block_device_info)
|
|
xml = conf.to_xml()
|
|
|
|
if write_to_disk:
|
|
instance_dir = libvirt_utils.get_instance_path(instance)
|
|
xml_path = os.path.join(instance_dir, 'libvirt.xml')
|
|
libvirt_utils.write_to_file(xml_path, xml)
|
|
|
|
LOG.debug(_('End to_xml instance=%(instance)s xml=%(xml)s') % locals())
|
|
return xml
|
|
|
|
def _lookup_by_name(self, instance_name):
|
|
"""Retrieve libvirt domain object given an instance name.
|
|
|
|
All libvirt error handling should be handled in this method and
|
|
relevant nova exceptions should be raised in response.
|
|
|
|
"""
|
|
try:
|
|
return self._conn.lookupByName(instance_name)
|
|
except libvirt.libvirtError as ex:
|
|
error_code = ex.get_error_code()
|
|
if error_code == libvirt.VIR_ERR_NO_DOMAIN:
|
|
raise exception.InstanceNotFound(instance_id=instance_name)
|
|
|
|
msg = _("Error from libvirt while looking up %(instance_name)s: "
|
|
"[Error Code %(error_code)s] %(ex)s") % locals()
|
|
raise exception.NovaException(msg)
|
|
|
|
def get_info(self, instance):
|
|
"""Retrieve information from libvirt for a specific instance name.
|
|
|
|
If a libvirt error is encountered during lookup, we might raise a
|
|
NotFound exception or Error exception depending on how severe the
|
|
libvirt error is.
|
|
|
|
"""
|
|
virt_dom = self._lookup_by_name(instance['name'])
|
|
(state, max_mem, mem, num_cpu, cpu_time) = virt_dom.info()
|
|
return {'state': LIBVIRT_POWER_STATE[state],
|
|
'max_mem': max_mem,
|
|
'mem': mem,
|
|
'num_cpu': num_cpu,
|
|
'cpu_time': cpu_time,
|
|
'id': virt_dom.ID()}
|
|
|
|
def _create_domain(self, xml=None, domain=None,
|
|
instance=None, launch_flags=0):
|
|
"""Create a domain.
|
|
|
|
Either domain or xml must be passed in. If both are passed, then
|
|
the domain definition is overwritten from the xml.
|
|
"""
|
|
inst_path = None
|
|
if instance:
|
|
inst_path = libvirt_utils.get_instance_path(instance)
|
|
|
|
if CONF.libvirt_type == 'lxc':
|
|
if not inst_path:
|
|
inst_path = None
|
|
|
|
container_dir = os.path.join(inst_path, 'rootfs')
|
|
fileutils.ensure_tree(container_dir)
|
|
image = self.image_backend.image(instance, 'disk')
|
|
disk.setup_container(image.path,
|
|
container_dir=container_dir,
|
|
use_cow=CONF.use_cow_images)
|
|
|
|
if xml:
|
|
domain = self._conn.defineXML(xml)
|
|
domain.createWithFlags(launch_flags)
|
|
self._enable_hairpin(domain.XMLDesc(0))
|
|
|
|
# NOTE(uni): Now the container is running with its own private mount
|
|
# namespace and so there is no need to keep the container rootfs
|
|
# mounted in the host namespace
|
|
if CONF.libvirt_type == 'lxc':
|
|
state = self.get_info(instance)['state']
|
|
container_dir = os.path.join(inst_path, 'rootfs')
|
|
if state == power_state.RUNNING:
|
|
disk.clean_lxc_namespace(container_dir=container_dir)
|
|
else:
|
|
disk.teardown_container(container_dir=container_dir)
|
|
|
|
return domain
|
|
|
|
def _create_domain_and_network(self, xml, instance, network_info,
|
|
block_device_info=None):
|
|
|
|
"""Do required network setup and create domain."""
|
|
block_device_mapping = driver.block_device_info_get_mapping(
|
|
block_device_info)
|
|
|
|
for vol in block_device_mapping:
|
|
connection_info = vol['connection_info']
|
|
disk_dev = vol['mount_device'].rpartition("/")[2]
|
|
disk_info = {
|
|
'dev': disk_dev,
|
|
'bus': blockinfo.get_disk_bus_for_disk_dev(CONF.libvirt_type,
|
|
disk_dev),
|
|
'type': 'disk',
|
|
}
|
|
self.volume_driver_method('connect_volume',
|
|
connection_info,
|
|
disk_info)
|
|
|
|
self.plug_vifs(instance, network_info)
|
|
self.firewall_driver.setup_basic_filtering(instance, network_info)
|
|
self.firewall_driver.prepare_instance_filter(instance, network_info)
|
|
domain = self._create_domain(xml, instance=instance)
|
|
|
|
self.firewall_driver.apply_instance_filter(instance, network_info)
|
|
return domain
|
|
|
|
def get_all_block_devices(self):
|
|
"""
|
|
Return all block devices in use on this node.
|
|
"""
|
|
devices = []
|
|
for dom_id in self.list_instance_ids():
|
|
try:
|
|
domain = self._conn.lookupByID(dom_id)
|
|
doc = etree.fromstring(domain.XMLDesc(0))
|
|
except Exception:
|
|
continue
|
|
ret = doc.findall('./devices/disk')
|
|
for node in ret:
|
|
if node.get('type') != 'block':
|
|
continue
|
|
for child in node.getchildren():
|
|
if child.tag == 'source':
|
|
devices.append(child.get('dev'))
|
|
return devices
|
|
|
|
def get_disks(self, instance_name):
|
|
"""
|
|
Note that this function takes an instance name.
|
|
|
|
Returns a list of all block devices for this domain.
|
|
"""
|
|
domain = self._lookup_by_name(instance_name)
|
|
xml = domain.XMLDesc(0)
|
|
|
|
try:
|
|
doc = etree.fromstring(xml)
|
|
except Exception:
|
|
return []
|
|
|
|
return filter(bool,
|
|
[target.get("dev")
|
|
for target in doc.findall('devices/disk/target')])
|
|
|
|
def get_interfaces(self, xml):
|
|
"""
|
|
Note that this function takes a domain xml.
|
|
|
|
Returns a list of all network interfaces for this instance.
|
|
"""
|
|
doc = None
|
|
|
|
try:
|
|
doc = etree.fromstring(xml)
|
|
except Exception:
|
|
return []
|
|
|
|
interfaces = []
|
|
|
|
ret = doc.findall('./devices/interface')
|
|
|
|
for node in ret:
|
|
devdst = None
|
|
|
|
for child in list(node):
|
|
if child.tag == 'target':
|
|
devdst = child.attrib['dev']
|
|
|
|
if devdst is None:
|
|
continue
|
|
|
|
interfaces.append(devdst)
|
|
|
|
return interfaces
|
|
|
|
def get_vcpu_total(self):
|
|
"""Get vcpu number of physical computer.
|
|
|
|
:returns: the number of cpu core.
|
|
|
|
"""
|
|
|
|
try:
|
|
return self._conn.getInfo()[2]
|
|
except libvirt.libvirtError:
|
|
LOG.warn(_("Cannot get the number of cpu, because this "
|
|
"function is not implemented for this platform. "))
|
|
return 0
|
|
|
|
def get_memory_mb_total(self):
|
|
"""Get the total memory size(MB) of physical computer.
|
|
|
|
:returns: the total amount of memory(MB).
|
|
|
|
"""
|
|
|
|
return self._conn.getInfo()[1]
|
|
|
|
@staticmethod
|
|
def get_local_gb_info():
|
|
"""Get local storage info of the compute node in GB.
|
|
|
|
:returns: A dict containing:
|
|
:total: How big the overall usable filesystem is (in gigabytes)
|
|
:free: How much space is free (in gigabytes)
|
|
:used: How much space is used (in gigabytes)
|
|
"""
|
|
|
|
if CONF.libvirt_images_type == 'lvm':
|
|
info = libvirt_utils.get_volume_group_info(
|
|
CONF.libvirt_images_volume_group)
|
|
else:
|
|
info = libvirt_utils.get_fs_info(CONF.instances_path)
|
|
|
|
for (k, v) in info.iteritems():
|
|
info[k] = v / (1024 ** 3)
|
|
|
|
return info
|
|
|
|
def get_vcpu_used(self):
|
|
"""Get vcpu usage number of physical computer.
|
|
|
|
:returns: The total number of vcpu that currently used.
|
|
|
|
"""
|
|
|
|
total = 0
|
|
if CONF.libvirt_type == 'lxc':
|
|
return total + 1
|
|
|
|
dom_ids = self.list_instance_ids()
|
|
for dom_id in dom_ids:
|
|
try:
|
|
dom = self._conn.lookupByID(dom_id)
|
|
vcpus = dom.vcpus()
|
|
if vcpus is None:
|
|
LOG.debug(_("couldn't obtain the vpu count from domain id:"
|
|
" %s") % dom_id)
|
|
else:
|
|
total += len(vcpus[1])
|
|
except libvirt.libvirtError as err:
|
|
if err.get_error_code() == libvirt.VIR_ERR_NO_DOMAIN:
|
|
LOG.debug(_("List of domains returned by libVirt: %s")
|
|
% dom_ids)
|
|
LOG.warn(_("libVirt can't find a domain with id: %s")
|
|
% dom_id)
|
|
continue
|
|
raise
|
|
# NOTE(gtt116): give change to do other task.
|
|
greenthread.sleep(0)
|
|
return total
|
|
|
|
def get_memory_mb_used(self):
|
|
"""Get the free memory size(MB) of physical computer.
|
|
|
|
:returns: the total usage of memory(MB).
|
|
|
|
"""
|
|
|
|
if sys.platform.upper() not in ['LINUX2', 'LINUX3']:
|
|
return 0
|
|
|
|
m = open('/proc/meminfo').read().split()
|
|
idx1 = m.index('MemFree:')
|
|
idx2 = m.index('Buffers:')
|
|
idx3 = m.index('Cached:')
|
|
if CONF.libvirt_type == 'xen':
|
|
used = 0
|
|
for domain_id in self.list_instance_ids():
|
|
# skip dom0
|
|
dom_mem = int(self._conn.lookupByID(domain_id).info()[2])
|
|
if domain_id != 0:
|
|
used += dom_mem
|
|
else:
|
|
# the mem reported by dom0 is be greater of what
|
|
# it is being used
|
|
used += (dom_mem -
|
|
(int(m[idx1 + 1]) +
|
|
int(m[idx2 + 1]) +
|
|
int(m[idx3 + 1])))
|
|
# Convert it to MB
|
|
return used / 1024
|
|
else:
|
|
avail = (int(m[idx1 + 1]) + int(m[idx2 + 1]) + int(m[idx3 + 1]))
|
|
# Convert it to MB
|
|
return self.get_memory_mb_total() - avail / 1024
|
|
|
|
def get_hypervisor_type(self):
|
|
"""Get hypervisor type.
|
|
|
|
:returns: hypervisor type (ex. qemu)
|
|
|
|
"""
|
|
|
|
return self._conn.getType()
|
|
|
|
def get_hypervisor_version(self):
|
|
"""Get hypervisor version.
|
|
|
|
:returns: hypervisor version (ex. 12003)
|
|
|
|
"""
|
|
|
|
# NOTE(justinsb): getVersion moved between libvirt versions
|
|
# Trying to do be compatible with older versions is a lost cause
|
|
# But ... we can at least give the user a nice message
|
|
method = getattr(self._conn, 'getVersion', None)
|
|
if method is None:
|
|
raise exception.NovaException(_("libvirt version is too old"
|
|
" (does not support getVersion)"))
|
|
# NOTE(justinsb): If we wanted to get the version, we could:
|
|
# method = getattr(libvirt, 'getVersion', None)
|
|
# NOTE(justinsb): This would then rely on a proper version check
|
|
|
|
return method()
|
|
|
|
def get_hypervisor_hostname(self):
|
|
"""Returns the hostname of the hypervisor."""
|
|
return self._conn.getHostname()
|
|
|
|
def get_instance_capabilities(self):
|
|
"""Get hypervisor instance capabilities
|
|
|
|
Returns a list of tuples that describe instances the
|
|
hypervisor is capable of hosting. Each tuple consists
|
|
of the triplet (arch, hypervisor_type, vm_mode).
|
|
|
|
:returns: List of tuples describing instance capabilities
|
|
"""
|
|
caps = self.get_host_capabilities()
|
|
instance_caps = list()
|
|
for g in caps.guests:
|
|
for dt in g.domtype:
|
|
instance_cap = (g.arch, dt, g.ostype)
|
|
instance_caps.append(instance_cap)
|
|
|
|
return instance_caps
|
|
|
|
def get_cpu_info(self):
|
|
"""Get cpuinfo information.
|
|
|
|
Obtains cpu feature from virConnect.getCapabilities,
|
|
and returns as a json string.
|
|
|
|
:return: see above description
|
|
|
|
"""
|
|
|
|
caps = self.get_host_capabilities()
|
|
cpu_info = dict()
|
|
|
|
cpu_info['arch'] = caps.host.cpu.arch
|
|
cpu_info['model'] = caps.host.cpu.model
|
|
cpu_info['vendor'] = caps.host.cpu.vendor
|
|
|
|
topology = dict()
|
|
topology['sockets'] = caps.host.cpu.sockets
|
|
topology['cores'] = caps.host.cpu.cores
|
|
topology['threads'] = caps.host.cpu.threads
|
|
cpu_info['topology'] = topology
|
|
|
|
features = list()
|
|
for f in caps.host.cpu.features:
|
|
features.append(f.name)
|
|
cpu_info['features'] = features
|
|
|
|
# TODO(berrange): why do we bother converting the
|
|
# libvirt capabilities XML into a special JSON format ?
|
|
# The data format is different across all the drivers
|
|
# so we could just return the raw capabilties XML
|
|
# which 'compare_cpu' could use directly
|
|
#
|
|
# That said, arch_filter.py now seems to rely on
|
|
# the libvirt drivers format which suggests this
|
|
# data format needs to be standardized across drivers
|
|
return jsonutils.dumps(cpu_info)
|
|
|
|
def get_all_volume_usage(self, context, compute_host_bdms):
|
|
"""Return usage info for volumes attached to vms on
|
|
a given host"""
|
|
vol_usage = []
|
|
|
|
for instance_bdms in compute_host_bdms:
|
|
instance = instance_bdms['instance']
|
|
|
|
for bdm in instance_bdms['instance_bdms']:
|
|
vol_stats = []
|
|
mountpoint = bdm['device_name']
|
|
if mountpoint.startswith('/dev/'):
|
|
mountpoint = mountpoint[5:]
|
|
volume_id = bdm['volume_id']
|
|
|
|
LOG.debug(_("Trying to get stats for the volume %s"),
|
|
volume_id)
|
|
vol_stats = self.block_stats(instance['name'], mountpoint)
|
|
|
|
if vol_stats:
|
|
stats = dict(volume=volume_id,
|
|
instance=instance,
|
|
rd_req=vol_stats[0],
|
|
rd_bytes=vol_stats[1],
|
|
wr_req=vol_stats[2],
|
|
wr_bytes=vol_stats[3],
|
|
flush_operations=vol_stats[4])
|
|
LOG.debug(
|
|
_("Got volume usage stats for the volume=%(volume)s,"
|
|
" instance=%(instance)s, rd_req=%(rd_req)d,"
|
|
" rd_bytes=%(rd_bytes)d, wr_req=%(wr_req)d,"
|
|
" wr_bytes=%(wr_bytes)d")
|
|
% stats)
|
|
vol_usage.append(stats)
|
|
|
|
return vol_usage
|
|
|
|
def block_stats(self, instance_name, disk):
|
|
"""
|
|
Note that this function takes an instance name.
|
|
"""
|
|
try:
|
|
domain = self._lookup_by_name(instance_name)
|
|
return domain.blockStats(disk)
|
|
except libvirt.libvirtError as e:
|
|
errcode = e.get_error_code()
|
|
LOG.info(_("Getting block stats failed, device might have "
|
|
"been detached. Instance=%(instance_name)s "
|
|
"Disk=%(disk)s Code=%(errcode)s Error=%(e)s")
|
|
% locals())
|
|
except exception.InstanceNotFound:
|
|
LOG.info(_("Could not find domain in libvirt for instance %s. "
|
|
"Cannot get block stats for device") % instance_name)
|
|
|
|
def interface_stats(self, instance_name, interface):
|
|
"""
|
|
Note that this function takes an instance name.
|
|
"""
|
|
domain = self._lookup_by_name(instance_name)
|
|
return domain.interfaceStats(interface)
|
|
|
|
def get_console_pool_info(self, console_type):
|
|
#TODO(mdragon): console proxy should be implemented for libvirt,
|
|
# in case someone wants to use it with kvm or
|
|
# such. For now return fake data.
|
|
return {'address': '127.0.0.1',
|
|
'username': 'fakeuser',
|
|
'password': 'fakepassword'}
|
|
|
|
def refresh_security_group_rules(self, security_group_id):
|
|
self.firewall_driver.refresh_security_group_rules(security_group_id)
|
|
|
|
def refresh_security_group_members(self, security_group_id):
|
|
self.firewall_driver.refresh_security_group_members(security_group_id)
|
|
|
|
def refresh_instance_security_rules(self, instance):
|
|
self.firewall_driver.refresh_instance_security_rules(instance)
|
|
|
|
def refresh_provider_fw_rules(self):
|
|
self.firewall_driver.refresh_provider_fw_rules()
|
|
|
|
def get_available_resource(self, nodename):
|
|
"""Retrieve resource info.
|
|
|
|
This method is called as a periodic task and is used only
|
|
in live migration currently.
|
|
|
|
:param nodename: ignored in this driver
|
|
:returns: dictionary containing resource info
|
|
"""
|
|
|
|
def _get_disk_available_least():
|
|
"""Return total real disk available least size.
|
|
|
|
The size of available disk, when block_migration command given
|
|
disk_over_commit param is FALSE.
|
|
|
|
The size that deducted real instance disk size from the total size
|
|
of the virtual disk of all instances.
|
|
|
|
"""
|
|
disk_free_gb = disk_info_dict['free']
|
|
disk_over_committed = self.get_disk_over_committed_size_total()
|
|
# Disk available least size
|
|
available_least = disk_free_gb * (1024 ** 3) - disk_over_committed
|
|
return (available_least / (1024 ** 3))
|
|
|
|
disk_info_dict = self.get_local_gb_info()
|
|
dic = {'vcpus': self.get_vcpu_total(),
|
|
'memory_mb': self.get_memory_mb_total(),
|
|
'local_gb': disk_info_dict['total'],
|
|
'vcpus_used': self.get_vcpu_used(),
|
|
'memory_mb_used': self.get_memory_mb_used(),
|
|
'local_gb_used': disk_info_dict['used'],
|
|
'hypervisor_type': self.get_hypervisor_type(),
|
|
'hypervisor_version': self.get_hypervisor_version(),
|
|
'hypervisor_hostname': self.get_hypervisor_hostname(),
|
|
'cpu_info': self.get_cpu_info(),
|
|
'disk_available_least': _get_disk_available_least()}
|
|
return dic
|
|
|
|
def check_can_live_migrate_destination(self, ctxt, instance_ref,
|
|
src_compute_info, dst_compute_info,
|
|
block_migration=False,
|
|
disk_over_commit=False):
|
|
"""Check if it is possible to execute live migration.
|
|
|
|
This runs checks on the destination host, and then calls
|
|
back to the source host to check the results.
|
|
|
|
:param ctxt: security context
|
|
:param instance_ref: nova.db.sqlalchemy.models.Instance
|
|
:param block_migration: if true, prepare for block migration
|
|
:param disk_over_commit: if true, allow disk over commit
|
|
"""
|
|
disk_available_mb = None
|
|
if block_migration:
|
|
disk_available_gb = dst_compute_info['disk_available_least']
|
|
disk_available_mb = \
|
|
(disk_available_gb * 1024) - CONF.reserved_host_disk_mb
|
|
|
|
# Compare CPU
|
|
src = instance_ref['host']
|
|
source_cpu_info = src_compute_info['cpu_info']
|
|
self._compare_cpu(source_cpu_info)
|
|
|
|
# Create file on storage, to be checked on source host
|
|
filename = self._create_shared_storage_test_file()
|
|
|
|
return {"filename": filename,
|
|
"block_migration": block_migration,
|
|
"disk_over_commit": disk_over_commit,
|
|
"disk_available_mb": disk_available_mb}
|
|
|
|
def check_can_live_migrate_destination_cleanup(self, ctxt,
|
|
dest_check_data):
|
|
"""Do required cleanup on dest host after check_can_live_migrate calls
|
|
|
|
:param ctxt: security context
|
|
"""
|
|
filename = dest_check_data["filename"]
|
|
self._cleanup_shared_storage_test_file(filename)
|
|
|
|
def check_can_live_migrate_source(self, ctxt, instance, dest_check_data):
|
|
"""Check if it is possible to execute live migration.
|
|
|
|
This checks if the live migration can succeed, based on the
|
|
results from check_can_live_migrate_destination.
|
|
|
|
:param context: security context
|
|
:param instance: nova.db.sqlalchemy.models.Instance
|
|
:param dest_check_data: result of check_can_live_migrate_destination
|
|
"""
|
|
# Checking shared storage connectivity
|
|
# if block migration, instances_paths should not be on shared storage.
|
|
source = CONF.host
|
|
filename = dest_check_data["filename"]
|
|
block_migration = dest_check_data["block_migration"]
|
|
is_volume_backed = dest_check_data.get('is_volume_backed', False)
|
|
|
|
shared = self._check_shared_storage_test_file(filename)
|
|
|
|
if block_migration:
|
|
if shared:
|
|
reason = _("Block migration can not be used "
|
|
"with shared storage.")
|
|
raise exception.InvalidLocalStorage(reason=reason, path=source)
|
|
self._assert_dest_node_has_enough_disk(ctxt, instance,
|
|
dest_check_data['disk_available_mb'],
|
|
dest_check_data['disk_over_commit'])
|
|
|
|
elif not shared and not is_volume_backed:
|
|
reason = _("Live migration can not be used "
|
|
"without shared storage.")
|
|
raise exception.InvalidSharedStorage(reason=reason, path=source)
|
|
dest_check_data.update({"is_shared_storage": shared})
|
|
|
|
# NOTE(mikal): include the instance directory name here because it
|
|
# doesn't yet exist on the destination but we want to force that
|
|
# same name to be used
|
|
instance_path = libvirt_utils.get_instance_path(instance,
|
|
relative=True)
|
|
dest_check_data['instance_relative_path'] = instance_path
|
|
|
|
return dest_check_data
|
|
|
|
def _assert_dest_node_has_enough_disk(self, context, instance_ref,
|
|
available_mb, disk_over_commit):
|
|
"""Checks if destination has enough disk for block migration."""
|
|
# Libvirt supports qcow2 disk format,which is usually compressed
|
|
# on compute nodes.
|
|
# Real disk image (compressed) may enlarged to "virtual disk size",
|
|
# that is specified as the maximum disk size.
|
|
# (See qemu-img -f path-to-disk)
|
|
# Scheduler recognizes destination host still has enough disk space
|
|
# if real disk size < available disk size
|
|
# if disk_over_commit is True,
|
|
# otherwise virtual disk size < available disk size.
|
|
|
|
available = 0
|
|
if available_mb:
|
|
available = available_mb * (1024 ** 2)
|
|
|
|
ret = self.get_instance_disk_info(instance_ref['name'])
|
|
disk_infos = jsonutils.loads(ret)
|
|
|
|
necessary = 0
|
|
if disk_over_commit:
|
|
for info in disk_infos:
|
|
necessary += int(info['disk_size'])
|
|
else:
|
|
for info in disk_infos:
|
|
necessary += int(info['virt_disk_size'])
|
|
|
|
# Check that available disk > necessary disk
|
|
if (available - necessary) < 0:
|
|
instance_uuid = instance_ref['uuid']
|
|
reason = _("Unable to migrate %(instance_uuid)s: "
|
|
"Disk of instance is too large(available"
|
|
" on destination host:%(available)s "
|
|
"< need:%(necessary)s)")
|
|
raise exception.MigrationPreCheckError(reason=reason % locals())
|
|
|
|
def _compare_cpu(self, cpu_info):
|
|
"""Checks the host cpu is compatible to a cpu given by xml.
|
|
|
|
"xml" must be a part of libvirt.openReadonly().getCapabilities().
|
|
return values follows by virCPUCompareResult.
|
|
if 0 > return value, do live migration.
|
|
'http://libvirt.org/html/libvirt-libvirt.html#virCPUCompareResult'
|
|
|
|
:param cpu_info: json string that shows cpu feature(see get_cpu_info())
|
|
:returns:
|
|
None. if given cpu info is not compatible to this server,
|
|
raise exception.
|
|
"""
|
|
|
|
# NOTE(berendt): virConnectCompareCPU not working for Xen
|
|
if CONF.libvirt_type == 'xen':
|
|
return 1
|
|
|
|
info = jsonutils.loads(cpu_info)
|
|
LOG.info(_('Instance launched has CPU info:\n%s') % cpu_info)
|
|
cpu = vconfig.LibvirtConfigCPU()
|
|
cpu.arch = info['arch']
|
|
cpu.model = info['model']
|
|
cpu.vendor = info['vendor']
|
|
cpu.sockets = info['topology']['sockets']
|
|
cpu.cores = info['topology']['cores']
|
|
cpu.threads = info['topology']['threads']
|
|
for f in info['features']:
|
|
cpu.add_feature(vconfig.LibvirtConfigCPUFeature(f))
|
|
|
|
u = "http://libvirt.org/html/libvirt-libvirt.html#virCPUCompareResult"
|
|
m = _("CPU doesn't have compatibility.\n\n%(ret)s\n\nRefer to %(u)s")
|
|
# unknown character exists in xml, then libvirt complains
|
|
try:
|
|
ret = self._conn.compareCPU(cpu.to_xml(), 0)
|
|
except libvirt.libvirtError, e:
|
|
with excutils.save_and_reraise_exception():
|
|
ret = e.message
|
|
LOG.error(m % locals())
|
|
|
|
if ret <= 0:
|
|
LOG.error(m % locals())
|
|
raise exception.InvalidCPUInfo(reason=m % locals())
|
|
|
|
def _create_shared_storage_test_file(self):
|
|
"""Makes tmpfile under CONF.instances_path."""
|
|
dirpath = CONF.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)
|
|
|
|
def _check_shared_storage_test_file(self, filename):
|
|
"""Confirms existence of the tmpfile under CONF.instances_path.
|
|
Cannot confirm tmpfile return False."""
|
|
tmp_file = os.path.join(CONF.instances_path, filename)
|
|
if not os.path.exists(tmp_file):
|
|
return False
|
|
else:
|
|
return True
|
|
|
|
def _cleanup_shared_storage_test_file(self, filename):
|
|
"""Removes existence of the tmpfile under CONF.instances_path."""
|
|
tmp_file = os.path.join(CONF.instances_path, filename)
|
|
os.remove(tmp_file)
|
|
|
|
def ensure_filtering_rules_for_instance(self, instance_ref, network_info,
|
|
time_module=None):
|
|
"""Ensure that an instance's filtering rules are enabled.
|
|
|
|
When migrating an instance, we need the filtering rules to
|
|
be configured on the destination host before starting the
|
|
migration.
|
|
|
|
Also, when restarting the compute service, we need to ensure
|
|
that filtering rules exist for all running services.
|
|
"""
|
|
|
|
if not time_module:
|
|
time_module = greenthread
|
|
|
|
self.firewall_driver.setup_basic_filtering(instance_ref, network_info)
|
|
self.firewall_driver.prepare_instance_filter(instance_ref,
|
|
network_info)
|
|
|
|
# nwfilters may be defined in a separate thread in the case
|
|
# of libvirt non-blocking mode, so we wait for completion
|
|
timeout_count = range(CONF.live_migration_retry_count)
|
|
while timeout_count:
|
|
if self.firewall_driver.instance_filter_exists(instance_ref,
|
|
network_info):
|
|
break
|
|
timeout_count.pop()
|
|
if len(timeout_count) == 0:
|
|
msg = _('The firewall filter for %s does not exist')
|
|
raise exception.NovaException(msg % instance_ref["name"])
|
|
time_module.sleep(1)
|
|
|
|
def filter_defer_apply_on(self):
|
|
self.firewall_driver.filter_defer_apply_on()
|
|
|
|
def filter_defer_apply_off(self):
|
|
self.firewall_driver.filter_defer_apply_off()
|
|
|
|
def live_migration(self, ctxt, instance_ref, dest,
|
|
post_method, recover_method, block_migration=False,
|
|
migrate_data=None):
|
|
"""Spawning live_migration operation for distributing high-load.
|
|
|
|
:params ctxt: security context
|
|
:params instance_ref:
|
|
nova.db.sqlalchemy.models.Instance object
|
|
instance object that is migrated.
|
|
:params dest: destination host
|
|
:params block_migration: destination host
|
|
:params post_method:
|
|
post operation method.
|
|
expected nova.compute.manager.post_live_migration.
|
|
:params recover_method:
|
|
recovery method when any exception occurs.
|
|
expected nova.compute.manager.recover_live_migration.
|
|
:params block_migration: if true, do block migration.
|
|
:params migrate_data: implementation specific params
|
|
|
|
"""
|
|
|
|
greenthread.spawn(self._live_migration, ctxt, instance_ref, dest,
|
|
post_method, recover_method, block_migration,
|
|
migrate_data)
|
|
|
|
def _live_migration(self, ctxt, instance_ref, dest, post_method,
|
|
recover_method, block_migration=False,
|
|
migrate_data=None):
|
|
"""Do live migration.
|
|
|
|
:params ctxt: security context
|
|
:params instance_ref:
|
|
nova.db.sqlalchemy.models.Instance object
|
|
instance object that is migrated.
|
|
:params dest: destination host
|
|
:params post_method:
|
|
post operation method.
|
|
expected nova.compute.manager.post_live_migration.
|
|
:params recover_method:
|
|
recovery method when any exception occurs.
|
|
expected nova.compute.manager.recover_live_migration.
|
|
:params migrate_data: implementation specific params
|
|
"""
|
|
|
|
# Do live migration.
|
|
try:
|
|
if block_migration:
|
|
flaglist = CONF.block_migration_flag.split(',')
|
|
else:
|
|
flaglist = CONF.live_migration_flag.split(',')
|
|
flagvals = [getattr(libvirt, x.strip()) for x in flaglist]
|
|
logical_sum = reduce(lambda x, y: x | y, flagvals)
|
|
|
|
dom = self._lookup_by_name(instance_ref["name"])
|
|
dom.migrateToURI(CONF.live_migration_uri % dest,
|
|
logical_sum,
|
|
None,
|
|
CONF.live_migration_bandwidth)
|
|
|
|
except Exception as e:
|
|
with excutils.save_and_reraise_exception():
|
|
LOG.error(_("Live Migration failure: %(e)s") % locals(),
|
|
instance=instance_ref)
|
|
recover_method(ctxt, instance_ref, dest, block_migration)
|
|
|
|
# Waiting for completion of live_migration.
|
|
timer = utils.FixedIntervalLoopingCall(f=None)
|
|
|
|
def wait_for_live_migration():
|
|
"""waiting for live migration completion."""
|
|
try:
|
|
self.get_info(instance_ref)['state']
|
|
except exception.NotFound:
|
|
timer.stop()
|
|
post_method(ctxt, instance_ref, dest, block_migration,
|
|
migrate_data)
|
|
|
|
timer.f = wait_for_live_migration
|
|
timer.start(interval=0.5).wait()
|
|
|
|
def _fetch_instance_kernel_ramdisk(self, context, instance):
|
|
"""Download kernel and ramdisk for instance in instance directory."""
|
|
instance_dir = libvirt_utils.get_instance_path(instance)
|
|
if instance['kernel_id']:
|
|
libvirt_utils.fetch_image(context,
|
|
os.path.join(instance_dir, 'kernel'),
|
|
instance['kernel_id'],
|
|
instance['user_id'],
|
|
instance['project_id'])
|
|
if instance['ramdisk_id']:
|
|
libvirt_utils.fetch_image(context,
|
|
os.path.join(instance_dir,
|
|
'ramdisk'),
|
|
instance['ramdisk_id'],
|
|
instance['user_id'],
|
|
instance['project_id'])
|
|
|
|
def pre_live_migration(self, context, instance, block_device_info,
|
|
network_info, migrate_data=None):
|
|
"""Preparation live migration."""
|
|
# Steps for volume backed instance live migration w/o shared storage.
|
|
is_shared_storage = True
|
|
is_volume_backed = False
|
|
is_block_migration = True
|
|
instance_relative_path = None
|
|
if migrate_data:
|
|
is_shared_storage = migrate_data.get('is_shared_storage', True)
|
|
is_volume_backed = migrate_data.get('is_volume_backed', False)
|
|
is_block_migration = migrate_data.get('block_migration', True)
|
|
instance_relative_path = migrate_data.get('instance_relative_path')
|
|
|
|
if not is_shared_storage:
|
|
# NOTE(mikal): this doesn't use libvirt_utils.get_instance_path
|
|
# because we are ensuring that the same instance directory name
|
|
# is used as was at the source
|
|
if instance_relative_path:
|
|
instance_dir = os.path.join(CONF.instances_path,
|
|
instance_relative_path)
|
|
else:
|
|
instance_dir = libvirt_utils.get_instance_path(instance)
|
|
|
|
if os.path.exists(instance_dir):
|
|
raise exception.DestinationDiskExists(path=instance_dir)
|
|
os.mkdir(instance_dir)
|
|
|
|
if is_volume_backed and not (is_block_migration or is_shared_storage):
|
|
# Touch the console.log file, required by libvirt.
|
|
console_file = self._get_console_log_path(instance)
|
|
libvirt_utils.file_open(console_file, 'a').close()
|
|
|
|
# if image has kernel and ramdisk, just download
|
|
# following normal way.
|
|
self._fetch_instance_kernel_ramdisk(context, instance)
|
|
|
|
# Establishing connection to volume server.
|
|
block_device_mapping = driver.block_device_info_get_mapping(
|
|
block_device_info)
|
|
for vol in block_device_mapping:
|
|
connection_info = vol['connection_info']
|
|
disk_dev = vol['mount_device'].rpartition("/")[2]
|
|
disk_info = {
|
|
'dev': disk_dev,
|
|
'bus': blockinfo.get_disk_bus_for_disk_dev(CONF.libvirt_type,
|
|
disk_dev),
|
|
'type': 'disk',
|
|
}
|
|
self.volume_driver_method('connect_volume',
|
|
connection_info,
|
|
disk_info)
|
|
|
|
# We call plug_vifs before the compute manager calls
|
|
# ensure_filtering_rules_for_instance, to ensure bridge is set up
|
|
# Retry operation is necessary because continuously request comes,
|
|
# concorrent request occurs to iptables, then it complains.
|
|
max_retry = CONF.live_migration_retry_count
|
|
for cnt in range(max_retry):
|
|
try:
|
|
self.plug_vifs(instance, 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.'),
|
|
{'cnt': cnt,
|
|
'max_retry': max_retry},
|
|
instance=instance)
|
|
greenthread.sleep(1)
|
|
|
|
def pre_block_migration(self, ctxt, instance, disk_info_json):
|
|
"""Preparation for block migration."""
|
|
# NOTE (rmk): When preparing for a block migration, the instance dir
|
|
# should not exist on the destination hypervisor.
|
|
instance_dir = libvirt_utils.get_instance_path(instance)
|
|
if os.path.exists(instance_dir):
|
|
raise exception.DestinationDiskExists(path=instance_dir)
|
|
os.mkdir(instance_dir)
|
|
self._create_images_and_backing(ctxt, instance, disk_info_json)
|
|
|
|
def _create_images_and_backing(self, ctxt, instance, disk_info_json):
|
|
"""
|
|
:params ctxt: security context
|
|
:params instance:
|
|
nova.db.sqlalchemy.models.Instance object
|
|
instance object that is migrated.
|
|
:params disk_info_json:
|
|
json strings specified in get_instance_disk_info
|
|
|
|
"""
|
|
disk_info = jsonutils.loads(disk_info_json)
|
|
instance_dir = libvirt_utils.get_instance_path(instance)
|
|
|
|
for info in disk_info:
|
|
base = os.path.basename(info['path'])
|
|
# Get image type and create empty disk image, and
|
|
# create backing file in case of qcow2.
|
|
instance_disk = os.path.join(instance_dir, base)
|
|
if not info['backing_file'] and not os.path.exists(instance_disk):
|
|
libvirt_utils.create_image(info['type'], instance_disk,
|
|
info['disk_size'])
|
|
else:
|
|
# Creating backing file follows same way as spawning instances.
|
|
cache_name = os.path.basename(info['backing_file'])
|
|
# Remove any size tags which the cache manages
|
|
cache_name = cache_name.split('_')[0]
|
|
|
|
image = self.image_backend.image(instance,
|
|
instance_disk,
|
|
CONF.libvirt_images_type)
|
|
image.cache(fetch_func=libvirt_utils.fetch_image,
|
|
context=ctxt,
|
|
filename=cache_name,
|
|
image_id=instance['image_ref'],
|
|
user_id=instance['user_id'],
|
|
project_id=instance['project_id'],
|
|
size=info['virt_disk_size'])
|
|
|
|
# if image has kernel and ramdisk, just download
|
|
# following normal way.
|
|
self._fetch_instance_kernel_ramdisk(ctxt, instance)
|
|
|
|
def post_live_migration_at_destination(self, ctxt,
|
|
instance_ref,
|
|
network_info,
|
|
block_migration,
|
|
block_device_info=None):
|
|
"""Post operation of live migration at destination host.
|
|
|
|
:param ctxt: security context
|
|
:param instance_ref:
|
|
nova.db.sqlalchemy.models.Instance object
|
|
instance object that is migrated.
|
|
:param network_info: instance network information
|
|
:param block_migration: if true, post operation of block_migraiton.
|
|
"""
|
|
# Define migrated instance, otherwise, suspend/destroy does not work.
|
|
dom_list = self._conn.listDefinedDomains()
|
|
if instance_ref["name"] not in dom_list:
|
|
# In case of block migration, destination does not have
|
|
# libvirt.xml
|
|
disk_info = blockinfo.get_disk_info(CONF.libvirt_type,
|
|
instance_ref)
|
|
self.to_xml(instance_ref, network_info, disk_info,
|
|
block_device_info, write_to_disk=True)
|
|
# libvirt.xml should be made by to_xml(), but libvirt
|
|
# does not accept to_xml() result, since uuid is not
|
|
# included in to_xml() result.
|
|
dom = self._lookup_by_name(instance_ref["name"])
|
|
self._conn.defineXML(dom.XMLDesc(0))
|
|
|
|
def get_instance_disk_info(self, instance_name, xml=None,
|
|
block_device_info=None):
|
|
"""Preparation block migration.
|
|
|
|
:params instance_ref:
|
|
nova.db.sqlalchemy.models.Instance object
|
|
instance object that is migrated.
|
|
:return:
|
|
json strings with below format::
|
|
|
|
"[{'path':'disk', 'type':'raw',
|
|
'virt_disk_size':'10737418240',
|
|
'backing_file':'backing_file',
|
|
'disk_size':'83886080'},...]"
|
|
|
|
"""
|
|
# NOTE (rmk): Passing the domain XML into this function is optional.
|
|
# When it is not passed, we attempt to extract it from
|
|
# the pre-existing definition.
|
|
if xml is None:
|
|
try:
|
|
virt_dom = self._lookup_by_name(instance_name)
|
|
xml = virt_dom.XMLDesc(0)
|
|
except libvirt.libvirtError as ex:
|
|
error_code = ex.get_error_code()
|
|
msg = _("Error from libvirt while getting description of "
|
|
"%(instance_name)s: [Error Code %(error_code)s] "
|
|
"%(ex)s") % locals()
|
|
LOG.warn(msg)
|
|
raise exception.InstanceNotFound(instance_id=instance_name)
|
|
|
|
# NOTE (rmk): When block_device_info is provided, we will use it to
|
|
# filter out devices which are actually volumes.
|
|
block_device_mapping = driver.block_device_info_get_mapping(
|
|
block_device_info)
|
|
|
|
volume_devices = set()
|
|
for vol in block_device_mapping:
|
|
disk_dev = vol['mount_device'].rpartition("/")[2]
|
|
volume_devices.add(disk_dev)
|
|
|
|
disk_info = []
|
|
doc = etree.fromstring(xml)
|
|
disk_nodes = doc.findall('.//devices/disk')
|
|
path_nodes = doc.findall('.//devices/disk/source')
|
|
driver_nodes = doc.findall('.//devices/disk/driver')
|
|
target_nodes = doc.findall('.//devices/disk/target')
|
|
|
|
for cnt, path_node in enumerate(path_nodes):
|
|
disk_type = disk_nodes[cnt].get('type')
|
|
path = path_node.get('file')
|
|
target = target_nodes[cnt].attrib['dev']
|
|
|
|
if disk_type != 'file':
|
|
LOG.debug(_('skipping %(path)s since it looks like volume') %
|
|
locals())
|
|
continue
|
|
|
|
if not path:
|
|
LOG.debug(_('skipping disk for %(instance_name)s as it'
|
|
' does not have a path') %
|
|
locals())
|
|
continue
|
|
|
|
if target in volume_devices:
|
|
LOG.debug(_('skipping disk %(path)s (%(target)s) as it is a '
|
|
'volume'), {'path': path, 'target': target})
|
|
continue
|
|
|
|
# get the real disk size or
|
|
# raise a localized error if image is unavailable
|
|
dk_size = int(os.path.getsize(path))
|
|
|
|
disk_type = driver_nodes[cnt].get('type')
|
|
if disk_type == "qcow2":
|
|
backing_file = libvirt_utils.get_disk_backing_file(path)
|
|
virt_size = disk.get_disk_size(path)
|
|
over_commit_size = int(virt_size) - dk_size
|
|
else:
|
|
backing_file = ""
|
|
virt_size = 0
|
|
over_commit_size = 0
|
|
|
|
disk_info.append({'type': disk_type,
|
|
'path': path,
|
|
'virt_disk_size': virt_size,
|
|
'backing_file': backing_file,
|
|
'disk_size': dk_size,
|
|
'over_committed_disk_size': over_commit_size})
|
|
return jsonutils.dumps(disk_info)
|
|
|
|
def get_disk_over_committed_size_total(self):
|
|
"""Return total over committed disk size for all instances."""
|
|
# Disk size that all instance uses : virtual_size - disk_size
|
|
instances_name = self.list_instances()
|
|
disk_over_committed_size = 0
|
|
for i_name in instances_name:
|
|
try:
|
|
disk_infos = jsonutils.loads(
|
|
self.get_instance_disk_info(i_name))
|
|
for info in disk_infos:
|
|
disk_over_committed_size += int(
|
|
info['over_committed_disk_size'])
|
|
except OSError as e:
|
|
if e.errno == errno.ENOENT:
|
|
LOG.error(_("Getting disk size of %(i_name)s: %(e)s") %
|
|
locals())
|
|
else:
|
|
raise
|
|
except exception.InstanceNotFound:
|
|
# Instance was deleted during the check so ignore it
|
|
pass
|
|
# NOTE(gtt116): give change to do other task.
|
|
greenthread.sleep(0)
|
|
return disk_over_committed_size
|
|
|
|
def unfilter_instance(self, instance_ref, network_info):
|
|
"""See comments of same method in firewall_driver."""
|
|
self.firewall_driver.unfilter_instance(instance_ref,
|
|
network_info=network_info)
|
|
|
|
def get_host_stats(self, refresh=False):
|
|
"""Return the current state of the host.
|
|
|
|
If 'refresh' is True, run update the stats first."""
|
|
return self.host_state.get_host_stats(refresh=refresh)
|
|
|
|
def get_host_uptime(self, host):
|
|
"""Returns the result of calling "uptime"."""
|
|
#NOTE(dprince): host seems to be ignored for this call and in
|
|
# other compute drivers as well. Perhaps we should remove it?
|
|
out, err = utils.execute('env', 'LANG=C', 'uptime')
|
|
return out
|
|
|
|
def manage_image_cache(self, context, all_instances):
|
|
"""Manage the local cache of images."""
|
|
self.image_cache_manager.verify_base_images(context, all_instances)
|
|
|
|
def _cleanup_remote_migration(self, dest, inst_base, inst_base_resize,
|
|
shared_storage=False):
|
|
"""Used only for cleanup in case migrate_disk_and_power_off fails."""
|
|
try:
|
|
if os.path.exists(inst_base_resize):
|
|
utils.execute('rm', '-rf', inst_base)
|
|
utils.execute('mv', inst_base_resize, inst_base)
|
|
if not shared_storage:
|
|
utils.execute('ssh', dest, 'rm', '-rf', inst_base)
|
|
except Exception:
|
|
pass
|
|
|
|
def _is_storage_shared_with(self, dest, inst_base):
|
|
# NOTE (rmk): There are two methods of determining whether we are
|
|
# on the same filesystem: the source and dest IP are the
|
|
# same, or we create a file on the dest system via SSH
|
|
# and check whether the source system can also see it.
|
|
shared_storage = (dest == self.get_host_ip_addr())
|
|
if not shared_storage:
|
|
tmp_file = uuid.uuid4().hex + '.tmp'
|
|
tmp_path = os.path.join(inst_base, tmp_file)
|
|
|
|
try:
|
|
utils.execute('ssh', dest, 'touch', tmp_path)
|
|
if os.path.exists(tmp_path):
|
|
shared_storage = True
|
|
os.unlink(tmp_path)
|
|
else:
|
|
utils.execute('ssh', dest, 'rm', tmp_path)
|
|
except Exception:
|
|
pass
|
|
return shared_storage
|
|
|
|
def migrate_disk_and_power_off(self, context, instance, dest,
|
|
instance_type, network_info,
|
|
block_device_info=None):
|
|
LOG.debug(_("Starting migrate_disk_and_power_off"),
|
|
instance=instance)
|
|
disk_info_text = self.get_instance_disk_info(instance['name'],
|
|
block_device_info=block_device_info)
|
|
disk_info = jsonutils.loads(disk_info_text)
|
|
|
|
self.power_off(instance)
|
|
|
|
block_device_mapping = driver.block_device_info_get_mapping(
|
|
block_device_info)
|
|
for vol in block_device_mapping:
|
|
connection_info = vol['connection_info']
|
|
disk_dev = vol['mount_device'].rpartition("/")[2]
|
|
self.volume_driver_method('disconnect_volume',
|
|
connection_info,
|
|
disk_dev)
|
|
|
|
# copy disks to destination
|
|
# rename instance dir to +_resize at first for using
|
|
# shared storage for instance dir (eg. NFS).
|
|
inst_base = libvirt_utils.get_instance_path(instance)
|
|
inst_base_resize = inst_base + "_resize"
|
|
|
|
shared_storage = self._is_storage_shared_with(dest, inst_base)
|
|
try:
|
|
utils.execute('mv', inst_base, inst_base_resize)
|
|
if shared_storage:
|
|
dest = None
|
|
utils.execute('mkdir', '-p', inst_base)
|
|
else:
|
|
utils.execute('ssh', dest, 'mkdir', '-p', inst_base)
|
|
for info in disk_info:
|
|
# assume inst_base == dirname(info['path'])
|
|
img_path = info['path']
|
|
fname = os.path.basename(img_path)
|
|
from_path = os.path.join(inst_base_resize, fname)
|
|
if info['type'] == 'qcow2' and info['backing_file']:
|
|
tmp_path = from_path + "_rbase"
|
|
# merge backing file
|
|
utils.execute('qemu-img', 'convert', '-f', 'qcow2',
|
|
'-O', 'qcow2', from_path, tmp_path)
|
|
|
|
if shared_storage:
|
|
utils.execute('mv', tmp_path, img_path)
|
|
else:
|
|
libvirt_utils.copy_image(tmp_path, img_path, host=dest)
|
|
utils.execute('rm', '-f', tmp_path)
|
|
|
|
else: # raw or qcow2 with no backing file
|
|
libvirt_utils.copy_image(from_path, img_path, host=dest)
|
|
except Exception:
|
|
with excutils.save_and_reraise_exception():
|
|
self._cleanup_remote_migration(dest, inst_base,
|
|
inst_base_resize,
|
|
shared_storage)
|
|
|
|
return disk_info_text
|
|
|
|
def _wait_for_running(self, instance):
|
|
state = self.get_info(instance)['state']
|
|
|
|
if state == power_state.RUNNING:
|
|
LOG.info(_("Instance running successfully."), instance=instance)
|
|
raise utils.LoopingCallDone()
|
|
|
|
def finish_migration(self, context, migration, instance, disk_info,
|
|
network_info, image_meta, resize_instance,
|
|
block_device_info=None):
|
|
LOG.debug(_("Starting finish_migration"), instance=instance)
|
|
|
|
# resize disks. only "disk" and "disk.local" are necessary.
|
|
disk_info = jsonutils.loads(disk_info)
|
|
for info in disk_info:
|
|
fname = os.path.basename(info['path'])
|
|
if fname == 'disk':
|
|
size = instance['root_gb']
|
|
elif fname == 'disk.local':
|
|
size = instance['ephemeral_gb']
|
|
else:
|
|
size = 0
|
|
size *= 1024 * 1024 * 1024
|
|
|
|
# If we have a non partitioned image that we can extend
|
|
# then ensure we're in 'raw' format so we can extend file system.
|
|
fmt = info['type']
|
|
if (size and fmt == 'qcow2' and
|
|
disk.can_resize_fs(info['path'], size, use_cow=True)):
|
|
path_raw = info['path'] + '_raw'
|
|
utils.execute('qemu-img', 'convert', '-f', 'qcow2',
|
|
'-O', 'raw', info['path'], path_raw)
|
|
utils.execute('mv', path_raw, info['path'])
|
|
fmt = 'raw'
|
|
|
|
if size:
|
|
disk.extend(info['path'], size)
|
|
|
|
if fmt == 'raw' and CONF.use_cow_images:
|
|
# back to qcow2 (no backing_file though) so that snapshot
|
|
# will be available
|
|
path_qcow = info['path'] + '_qcow'
|
|
utils.execute('qemu-img', 'convert', '-f', 'raw',
|
|
'-O', 'qcow2', info['path'], path_qcow)
|
|
utils.execute('mv', path_qcow, info['path'])
|
|
|
|
disk_info = blockinfo.get_disk_info(CONF.libvirt_type,
|
|
instance,
|
|
block_device_info,
|
|
image_meta)
|
|
# assume _create_image do nothing if a target file exists.
|
|
# TODO(oda): injecting files is not necessary
|
|
self._create_image(context, instance,
|
|
disk_mapping=disk_info['mapping'],
|
|
network_info=network_info,
|
|
block_device_info=None)
|
|
xml = self.to_xml(instance, network_info, disk_info,
|
|
block_device_info=block_device_info,
|
|
write_to_disk=True)
|
|
self._create_domain_and_network(xml, instance, network_info,
|
|
block_device_info)
|
|
timer = utils.FixedIntervalLoopingCall(self._wait_for_running,
|
|
instance)
|
|
timer.start(interval=0.5).wait()
|
|
|
|
def _cleanup_failed_migration(self, inst_base):
|
|
"""Make sure that a failed migrate doesn't prevent us from rolling
|
|
back in a revert."""
|
|
shutil.rmtree(inst_base)
|
|
|
|
def finish_revert_migration(self, instance, network_info,
|
|
block_device_info=None):
|
|
LOG.debug(_("Starting finish_revert_migration"),
|
|
instance=instance)
|
|
|
|
inst_base = libvirt_utils.get_instance_path(instance)
|
|
inst_base_resize = inst_base + "_resize"
|
|
|
|
# NOTE(danms): if we're recovering from a failed migration,
|
|
# make sure we don't have a left-over same-host base directory
|
|
# that would conflict. Also, don't fail on the rename if the
|
|
# failure happened early.
|
|
if os.path.exists(inst_base_resize):
|
|
if os.path.exists(inst_base):
|
|
self._cleanup_failed_migration(inst_base)
|
|
utils.execute('mv', inst_base_resize, inst_base)
|
|
|
|
disk_info = blockinfo.get_disk_info(CONF.libvirt_type,
|
|
instance,
|
|
block_device_info)
|
|
xml = self.to_xml(instance, network_info, disk_info,
|
|
block_device_info=block_device_info)
|
|
self._create_domain_and_network(xml, instance, network_info,
|
|
block_device_info)
|
|
|
|
timer = utils.FixedIntervalLoopingCall(self._wait_for_running,
|
|
instance)
|
|
timer.start(interval=0.5).wait()
|
|
|
|
def confirm_migration(self, migration, instance, network_info):
|
|
"""Confirms a resize, destroying the source VM."""
|
|
self._cleanup_resize(instance, network_info)
|
|
|
|
def get_diagnostics(self, instance):
|
|
def get_io_devices(xml_doc):
|
|
"""get the list of io devices from the xml document."""
|
|
result = {"volumes": [], "ifaces": []}
|
|
try:
|
|
doc = etree.fromstring(xml_doc)
|
|
except Exception:
|
|
return result
|
|
blocks = [('./devices/disk', 'volumes'),
|
|
('./devices/interface', 'ifaces')]
|
|
for block, key in blocks:
|
|
section = doc.findall(block)
|
|
for node in section:
|
|
for child in node.getchildren():
|
|
if child.tag == 'target' and child.get('dev'):
|
|
result[key].append(child.get('dev'))
|
|
return result
|
|
|
|
domain = self._lookup_by_name(instance['name'])
|
|
output = {}
|
|
# get cpu time, might launch an exception if the method
|
|
# is not supported by the underlying hypervisor being
|
|
# used by libvirt
|
|
try:
|
|
cputime = domain.vcpus()[0]
|
|
for i in range(len(cputime)):
|
|
output["cpu" + str(i) + "_time"] = cputime[i][2]
|
|
except libvirt.libvirtError:
|
|
pass
|
|
# get io status
|
|
xml = domain.XMLDesc(0)
|
|
dom_io = get_io_devices(xml)
|
|
for disk in dom_io["volumes"]:
|
|
try:
|
|
# blockStats might launch an exception if the method
|
|
# is not supported by the underlying hypervisor being
|
|
# used by libvirt
|
|
stats = domain.blockStats(disk)
|
|
output[disk + "_read_req"] = stats[0]
|
|
output[disk + "_read"] = stats[1]
|
|
output[disk + "_write_req"] = stats[2]
|
|
output[disk + "_write"] = stats[3]
|
|
output[disk + "_errors"] = stats[4]
|
|
except libvirt.libvirtError:
|
|
pass
|
|
for interface in dom_io["ifaces"]:
|
|
try:
|
|
# interfaceStats might launch an exception if the method
|
|
# is not supported by the underlying hypervisor being
|
|
# used by libvirt
|
|
stats = domain.interfaceStats(interface)
|
|
output[interface + "_rx"] = stats[0]
|
|
output[interface + "_rx_packets"] = stats[1]
|
|
output[interface + "_rx_errors"] = stats[2]
|
|
output[interface + "_rx_drop"] = stats[3]
|
|
output[interface + "_tx"] = stats[4]
|
|
output[interface + "_tx_packets"] = stats[5]
|
|
output[interface + "_tx_errors"] = stats[6]
|
|
output[interface + "_tx_drop"] = stats[7]
|
|
except libvirt.libvirtError:
|
|
pass
|
|
output["memory"] = domain.maxMemory()
|
|
# memoryStats might launch an exception if the method
|
|
# is not supported by the underlying hypervisor being
|
|
# used by libvirt
|
|
try:
|
|
mem = domain.memoryStats()
|
|
for key in mem.keys():
|
|
output["memory-" + key] = mem[key]
|
|
except (libvirt.libvirtError, AttributeError):
|
|
pass
|
|
return output
|
|
|
|
def add_to_aggregate(self, context, aggregate, host, **kwargs):
|
|
"""Add a compute host to an aggregate."""
|
|
#NOTE(jogo) Currently only used for XenAPI-Pool
|
|
pass
|
|
|
|
def remove_from_aggregate(self, context, aggregate, host, **kwargs):
|
|
"""Remove a compute host from an aggregate."""
|
|
pass
|
|
|
|
def undo_aggregate_operation(self, context, op, aggregate,
|
|
host, set_error=True):
|
|
"""only used for Resource Pools."""
|
|
pass
|
|
|
|
def instance_on_disk(self, instance):
|
|
# ensure directories exist and are writable
|
|
instance_path = libvirt_utils.get_instance_path(instance)
|
|
LOG.debug(_('Checking instance files accessability'
|
|
'%(instance_path)s')
|
|
% locals())
|
|
return os.access(instance_path, os.W_OK)
|
|
|
|
def inject_network_info(self, instance, nw_info):
|
|
self.firewall_driver.setup_basic_filtering(instance, nw_info)
|
|
|
|
|
|
class HostState(object):
|
|
"""Manages information about the compute node through libvirt."""
|
|
def __init__(self, driver):
|
|
super(HostState, self).__init__()
|
|
self._stats = {}
|
|
self.driver = driver
|
|
self.update_status()
|
|
|
|
def get_host_stats(self, refresh=False):
|
|
"""Return the current state of the host.
|
|
|
|
If 'refresh' is True, run update the stats first."""
|
|
if refresh:
|
|
self.update_status()
|
|
return self._stats
|
|
|
|
def update_status(self):
|
|
"""Retrieve status info from libvirt."""
|
|
LOG.debug(_("Updating host stats"))
|
|
data = {}
|
|
data["vcpus"] = self.driver.get_vcpu_total()
|
|
data["vcpus_used"] = self.driver.get_vcpu_used()
|
|
data["cpu_info"] = jsonutils.loads(self.driver.get_cpu_info())
|
|
disk_info_dict = self.driver.get_local_gb_info()
|
|
data["disk_total"] = disk_info_dict['total']
|
|
data["disk_used"] = disk_info_dict['used']
|
|
data["disk_available"] = disk_info_dict['free']
|
|
data["host_memory_total"] = self.driver.get_memory_mb_total()
|
|
data["host_memory_free"] = (data["host_memory_total"] -
|
|
self.driver.get_memory_mb_used())
|
|
data["hypervisor_type"] = self.driver.get_hypervisor_type()
|
|
data["hypervisor_version"] = self.driver.get_hypervisor_version()
|
|
data["hypervisor_hostname"] = self.driver.get_hypervisor_hostname()
|
|
data["supported_instances"] = \
|
|
self.driver.get_instance_capabilities()
|
|
|
|
self._stats = data
|
|
|
|
return data
|