root / lib / hypervisor / hv_kvm.py @ e6e4ff4c
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#
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#
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# Copyright (C) 2008, 2009, 2010, 2011, 2012, 2013 Google Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA.
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"""KVM hypervisor
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"""
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import errno |
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import os |
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import os.path |
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import re |
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import tempfile |
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import time |
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import logging |
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import pwd |
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import struct |
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import fcntl |
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import shutil |
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import socket |
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import stat |
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import StringIO |
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try:
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import affinity # pylint: disable=F0401 |
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except ImportError: |
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affinity = None
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from ganeti import utils |
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from ganeti import constants |
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from ganeti import errors |
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from ganeti import serializer |
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from ganeti import objects |
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from ganeti import uidpool |
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from ganeti import ssconf |
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from ganeti import netutils |
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from ganeti import pathutils |
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from ganeti.hypervisor import hv_base |
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from ganeti.utils import wrapper as utils_wrapper |
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_KVM_NETWORK_SCRIPT = pathutils.CONF_DIR + "/kvm-vif-bridge"
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_KVM_START_PAUSED_FLAG = "-S"
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# TUN/TAP driver constants, taken from <linux/if_tun.h>
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# They are architecture-independent and already hardcoded in qemu-kvm source,
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# so we can safely include them here.
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TUNSETIFF = 0x400454ca
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TUNGETIFF = 0x800454d2
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TUNGETFEATURES = 0x800454cf
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IFF_TAP = 0x0002
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IFF_NO_PI = 0x1000
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IFF_VNET_HDR = 0x4000
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#: SPICE parameters which depend on L{constants.HV_KVM_SPICE_BIND}
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_SPICE_ADDITIONAL_PARAMS = frozenset([
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constants.HV_KVM_SPICE_IP_VERSION, |
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constants.HV_KVM_SPICE_PASSWORD_FILE, |
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constants.HV_KVM_SPICE_LOSSLESS_IMG_COMPR, |
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constants.HV_KVM_SPICE_JPEG_IMG_COMPR, |
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constants.HV_KVM_SPICE_ZLIB_GLZ_IMG_COMPR, |
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constants.HV_KVM_SPICE_STREAMING_VIDEO_DETECTION, |
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constants.HV_KVM_SPICE_USE_TLS, |
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]) |
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def _GetTunFeatures(fd, _ioctl=fcntl.ioctl): |
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"""Retrieves supported TUN features from file descriptor.
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@see: L{_ProbeTapVnetHdr}
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"""
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req = struct.pack("I", 0) |
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try:
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buf = _ioctl(fd, TUNGETFEATURES, req) |
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except EnvironmentError, err: |
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logging.warning("ioctl(TUNGETFEATURES) failed: %s", err)
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return None |
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else:
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(flags, ) = struct.unpack("I", buf)
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return flags
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def _ProbeTapVnetHdr(fd, _features_fn=_GetTunFeatures): |
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"""Check whether to enable the IFF_VNET_HDR flag.
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To do this, _all_ of the following conditions must be met:
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1. TUNGETFEATURES ioctl() *must* be implemented
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2. TUNGETFEATURES ioctl() result *must* contain the IFF_VNET_HDR flag
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3. TUNGETIFF ioctl() *must* be implemented; reading the kernel code in
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drivers/net/tun.c there is no way to test this until after the tap device
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has been created using TUNSETIFF, and there is no way to change the
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IFF_VNET_HDR flag after creating the interface, catch-22! However both
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TUNGETIFF and TUNGETFEATURES were introduced in kernel version 2.6.27,
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thus we can expect TUNGETIFF to be present if TUNGETFEATURES is.
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@type fd: int
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@param fd: the file descriptor of /dev/net/tun
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"""
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flags = _features_fn(fd) |
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if flags is None: |
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# Not supported
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return False |
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result = bool(flags & IFF_VNET_HDR)
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if not result: |
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logging.warning("Kernel does not support IFF_VNET_HDR, not enabling")
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return result
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def _OpenTap(vnet_hdr=True): |
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"""Open a new tap device and return its file descriptor.
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This is intended to be used by a qemu-type hypervisor together with the -net
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tap,fd=<fd> command line parameter.
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@type vnet_hdr: boolean
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@param vnet_hdr: Enable the VNET Header
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@return: (ifname, tapfd)
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@rtype: tuple
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"""
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try:
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tapfd = os.open("/dev/net/tun", os.O_RDWR)
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except EnvironmentError: |
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raise errors.HypervisorError("Failed to open /dev/net/tun") |
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flags = IFF_TAP | IFF_NO_PI |
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if vnet_hdr and _ProbeTapVnetHdr(tapfd): |
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flags |= IFF_VNET_HDR |
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# The struct ifreq ioctl request (see netdevice(7))
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ifr = struct.pack("16sh", "", flags) |
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try:
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res = fcntl.ioctl(tapfd, TUNSETIFF, ifr) |
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except EnvironmentError, err: |
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raise errors.HypervisorError("Failed to allocate a new TAP device: %s" % |
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err) |
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# Get the interface name from the ioctl
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ifname = struct.unpack("16sh", res)[0].strip("\x00") |
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return (ifname, tapfd)
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class QmpMessage: |
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"""QEMU Messaging Protocol (QMP) message.
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"""
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def __init__(self, data): |
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"""Creates a new QMP message based on the passed data.
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"""
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if not isinstance(data, dict): |
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raise TypeError("QmpMessage must be initialized with a dict") |
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self.data = data
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def __getitem__(self, field_name): |
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"""Get the value of the required field if present, or None.
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Overrides the [] operator to provide access to the message data,
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returning None if the required item is not in the message
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@return: the value of the field_name field, or None if field_name
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is not contained in the message
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"""
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return self.data.get(field_name, None) |
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def __setitem__(self, field_name, field_value): |
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"""Set the value of the required field_name to field_value.
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"""
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self.data[field_name] = field_value
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@staticmethod
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def BuildFromJsonString(json_string): |
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"""Build a QmpMessage from a JSON encoded string.
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@type json_string: str
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@param json_string: JSON string representing the message
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@rtype: L{QmpMessage}
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@return: a L{QmpMessage} built from json_string
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"""
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# Parse the string
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data = serializer.LoadJson(json_string) |
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return QmpMessage(data)
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def __str__(self): |
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# The protocol expects the JSON object to be sent as a single line.
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return serializer.DumpJson(self.data) |
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def __eq__(self, other): |
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# When comparing two QmpMessages, we are interested in comparing
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# their internal representation of the message data
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return self.data == other.data |
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class QmpConnection: |
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"""Connection to the QEMU Monitor using the QEMU Monitor Protocol (QMP).
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"""
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_FIRST_MESSAGE_KEY = "QMP"
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_EVENT_KEY = "event"
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_ERROR_KEY = "error"
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_RETURN_KEY = RETURN_KEY = "return"
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_ACTUAL_KEY = ACTUAL_KEY = "actual"
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_ERROR_CLASS_KEY = "class"
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_ERROR_DATA_KEY = "data"
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_ERROR_DESC_KEY = "desc"
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_EXECUTE_KEY = "execute"
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_ARGUMENTS_KEY = "arguments"
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_CAPABILITIES_COMMAND = "qmp_capabilities"
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_MESSAGE_END_TOKEN = "\r\n"
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_SOCKET_TIMEOUT = 5
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def __init__(self, monitor_filename): |
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"""Instantiates the QmpConnection object.
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@type monitor_filename: string
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@param monitor_filename: the filename of the UNIX raw socket on which the
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QMP monitor is listening
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"""
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self.monitor_filename = monitor_filename
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self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
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# We want to fail if the server doesn't send a complete message
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# in a reasonable amount of time
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self.sock.settimeout(self._SOCKET_TIMEOUT) |
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self._connected = False |
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self._buf = "" |
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def _check_socket(self): |
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sock_stat = None
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try:
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sock_stat = os.stat(self.monitor_filename)
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except EnvironmentError, err: |
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if err.errno == errno.ENOENT:
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raise errors.HypervisorError("No qmp socket found") |
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else:
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raise errors.HypervisorError("Error checking qmp socket: %s", |
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utils.ErrnoOrStr(err)) |
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if not stat.S_ISSOCK(sock_stat.st_mode): |
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raise errors.HypervisorError("Qmp socket is not a socket") |
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def _check_connection(self): |
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"""Make sure that the connection is established.
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"""
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if not self._connected: |
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raise errors.ProgrammerError("To use a QmpConnection you need to first" |
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" invoke connect() on it")
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def connect(self): |
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"""Connects to the QMP monitor.
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Connects to the UNIX socket and makes sure that we can actually send and
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receive data to the kvm instance via QMP.
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@raise errors.HypervisorError: when there are communication errors
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@raise errors.ProgrammerError: when there are data serialization errors
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"""
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if self._connected: |
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raise errors.ProgrammerError("Cannot connect twice") |
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self._check_socket()
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# Check file existance/stuff
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try:
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self.sock.connect(self.monitor_filename) |
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except EnvironmentError: |
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raise errors.HypervisorError("Can't connect to qmp socket") |
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self._connected = True |
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# Check if we receive a correct greeting message from the server
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# (As per the QEMU Protocol Specification 0.1 - section 2.2)
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greeting = self._Recv()
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if not greeting[self._FIRST_MESSAGE_KEY]: |
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self._connected = False |
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raise errors.HypervisorError("kvm: QMP communication error (wrong" |
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" server greeting")
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# Let's put the monitor in command mode using the qmp_capabilities
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# command, or else no command will be executable.
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# (As per the QEMU Protocol Specification 0.1 - section 4)
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self.Execute(self._CAPABILITIES_COMMAND) |
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def _ParseMessage(self, buf): |
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"""Extract and parse a QMP message from the given buffer.
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Seeks for a QMP message in the given buf. If found, it parses it and
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returns it together with the rest of the characters in the buf.
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If no message is found, returns None and the whole buffer.
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@raise errors.ProgrammerError: when there are data serialization errors
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"""
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message = None
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# Check if we got the message end token (CRLF, as per the QEMU Protocol
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# Specification 0.1 - Section 2.1.1)
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pos = buf.find(self._MESSAGE_END_TOKEN)
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if pos >= 0: |
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try:
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message = QmpMessage.BuildFromJsonString(buf[:pos + 1])
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except Exception, err: |
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raise errors.ProgrammerError("QMP data serialization error: %s" % err) |
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buf = buf[pos + 1:]
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return (message, buf)
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def _Recv(self): |
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"""Receives a message from QMP and decodes the received JSON object.
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@rtype: QmpMessage
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@return: the received message
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@raise errors.HypervisorError: when there are communication errors
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@raise errors.ProgrammerError: when there are data serialization errors
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"""
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self._check_connection()
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# Check if there is already a message in the buffer
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(message, self._buf) = self._ParseMessage(self._buf) |
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if message:
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return message
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recv_buffer = StringIO.StringIO(self._buf)
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recv_buffer.seek(len(self._buf)) |
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try:
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while True: |
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data = self.sock.recv(4096) |
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if not data: |
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break
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recv_buffer.write(data) |
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(message, self._buf) = self._ParseMessage(recv_buffer.getvalue()) |
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if message:
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return message
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except socket.timeout, err:
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raise errors.HypervisorError("Timeout while receiving a QMP message: " |
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"%s" % (err))
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except socket.error, err:
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raise errors.HypervisorError("Unable to receive data from KVM using the" |
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" QMP protocol: %s" % err)
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def _Send(self, message): |
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"""Encodes and sends a message to KVM using QMP.
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@type message: QmpMessage
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@param message: message to send to KVM
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@raise errors.HypervisorError: when there are communication errors
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@raise errors.ProgrammerError: when there are data serialization errors
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"""
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self._check_connection()
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try:
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message_str = str(message)
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except Exception, err: |
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raise errors.ProgrammerError("QMP data deserialization error: %s" % err) |
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try:
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self.sock.sendall(message_str)
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except socket.timeout, err:
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raise errors.HypervisorError("Timeout while sending a QMP message: " |
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"%s (%s)" % (err.string, err.errno))
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except socket.error, err:
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raise errors.HypervisorError("Unable to send data from KVM using the" |
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" QMP protocol: %s" % err)
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def Execute(self, command, arguments=None): |
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"""Executes a QMP command and returns the response of the server.
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@type command: str
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@param command: the command to execute
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@type arguments: dict
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@param arguments: dictionary of arguments to be passed to the command
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@rtype: dict
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@return: dictionary representing the received JSON object
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@raise errors.HypervisorError: when there are communication errors
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@raise errors.ProgrammerError: when there are data serialization errors
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"""
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self._check_connection()
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message = QmpMessage({self._EXECUTE_KEY: command})
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if arguments:
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message[self._ARGUMENTS_KEY] = arguments
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self._Send(message)
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# Events can occur between the sending of the command and the reception
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# of the response, so we need to filter out messages with the event key.
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while True: |
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response = self._Recv()
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err = response[self._ERROR_KEY]
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if err:
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raise errors.HypervisorError("kvm: error executing the %s" |
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" command: %s (%s, %s):" %
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(command, |
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err[self._ERROR_DESC_KEY],
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err[self._ERROR_CLASS_KEY],
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err[self._ERROR_DATA_KEY]))
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elif not response[self._EVENT_KEY]: |
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return response
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class KVMHypervisor(hv_base.BaseHypervisor): |
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"""KVM hypervisor interface
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"""
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CAN_MIGRATE = True
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_ROOT_DIR = pathutils.RUN_DIR + "/kvm-hypervisor"
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_PIDS_DIR = _ROOT_DIR + "/pid" # contains live instances pids |
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_UIDS_DIR = _ROOT_DIR + "/uid" # contains instances reserved uids |
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_CTRL_DIR = _ROOT_DIR + "/ctrl" # contains instances control sockets |
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_CONF_DIR = _ROOT_DIR + "/conf" # contains instances startup data |
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_NICS_DIR = _ROOT_DIR + "/nic" # contains instances nic <-> tap associations |
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_KEYMAP_DIR = _ROOT_DIR + "/keymap" # contains instances keymaps |
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# KVM instances with chroot enabled are started in empty chroot directories.
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_CHROOT_DIR = _ROOT_DIR + "/chroot" # for empty chroot directories |
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# After an instance is stopped, its chroot directory is removed.
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# If the chroot directory is not empty, it can't be removed.
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# A non-empty chroot directory indicates a possible security incident.
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# To support forensics, the non-empty chroot directory is quarantined in
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# a separate directory, called 'chroot-quarantine'.
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_CHROOT_QUARANTINE_DIR = _ROOT_DIR + "/chroot-quarantine"
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_DIRS = [_ROOT_DIR, _PIDS_DIR, _UIDS_DIR, _CTRL_DIR, _CONF_DIR, _NICS_DIR, |
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_CHROOT_DIR, _CHROOT_QUARANTINE_DIR, _KEYMAP_DIR] |
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PARAMETERS = {
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constants.HV_KVM_PATH: hv_base.REQ_FILE_CHECK, |
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constants.HV_KERNEL_PATH: hv_base.OPT_FILE_CHECK, |
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constants.HV_INITRD_PATH: hv_base.OPT_FILE_CHECK, |
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constants.HV_ROOT_PATH: hv_base.NO_CHECK, |
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constants.HV_KERNEL_ARGS: hv_base.NO_CHECK, |
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constants.HV_ACPI: hv_base.NO_CHECK, |
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constants.HV_SERIAL_CONSOLE: hv_base.NO_CHECK, |
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constants.HV_SERIAL_SPEED: hv_base.NO_CHECK, |
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constants.HV_VNC_BIND_ADDRESS: |
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(False, lambda x: (netutils.IP4Address.IsValid(x) or |
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utils.IsNormAbsPath(x)), |
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"The VNC bind address must be either a valid IP address or an absolute"
|
| 467 |
" pathname", None, None), |
| 468 |
constants.HV_VNC_TLS: hv_base.NO_CHECK, |
| 469 |
constants.HV_VNC_X509: hv_base.OPT_DIR_CHECK, |
| 470 |
constants.HV_VNC_X509_VERIFY: hv_base.NO_CHECK, |
| 471 |
constants.HV_VNC_PASSWORD_FILE: hv_base.OPT_FILE_CHECK, |
| 472 |
constants.HV_KVM_SPICE_BIND: hv_base.NO_CHECK, # will be checked later
|
| 473 |
constants.HV_KVM_SPICE_IP_VERSION: |
| 474 |
(False, lambda x: (x == constants.IFACE_NO_IP_VERSION_SPECIFIED or |
| 475 |
x in constants.VALID_IP_VERSIONS),
|
| 476 |
"The SPICE IP version should be 4 or 6",
|
| 477 |
None, None), |
| 478 |
constants.HV_KVM_SPICE_PASSWORD_FILE: hv_base.OPT_FILE_CHECK, |
| 479 |
constants.HV_KVM_SPICE_LOSSLESS_IMG_COMPR: |
| 480 |
hv_base.ParamInSet( |
| 481 |
False, constants.HT_KVM_SPICE_VALID_LOSSLESS_IMG_COMPR_OPTIONS),
|
| 482 |
constants.HV_KVM_SPICE_JPEG_IMG_COMPR: |
| 483 |
hv_base.ParamInSet( |
| 484 |
False, constants.HT_KVM_SPICE_VALID_LOSSY_IMG_COMPR_OPTIONS),
|
| 485 |
constants.HV_KVM_SPICE_ZLIB_GLZ_IMG_COMPR: |
| 486 |
hv_base.ParamInSet( |
| 487 |
False, constants.HT_KVM_SPICE_VALID_LOSSY_IMG_COMPR_OPTIONS),
|
| 488 |
constants.HV_KVM_SPICE_STREAMING_VIDEO_DETECTION: |
| 489 |
hv_base.ParamInSet( |
| 490 |
False, constants.HT_KVM_SPICE_VALID_VIDEO_STREAM_DETECTION_OPTIONS),
|
| 491 |
constants.HV_KVM_SPICE_AUDIO_COMPR: hv_base.NO_CHECK, |
| 492 |
constants.HV_KVM_SPICE_USE_TLS: hv_base.NO_CHECK, |
| 493 |
constants.HV_KVM_SPICE_TLS_CIPHERS: hv_base.NO_CHECK, |
| 494 |
constants.HV_KVM_SPICE_USE_VDAGENT: hv_base.NO_CHECK, |
| 495 |
constants.HV_KVM_FLOPPY_IMAGE_PATH: hv_base.OPT_FILE_CHECK, |
| 496 |
constants.HV_CDROM_IMAGE_PATH: hv_base.OPT_FILE_CHECK, |
| 497 |
constants.HV_KVM_CDROM2_IMAGE_PATH: hv_base.OPT_FILE_CHECK, |
| 498 |
constants.HV_BOOT_ORDER: |
| 499 |
hv_base.ParamInSet(True, constants.HT_KVM_VALID_BO_TYPES),
|
| 500 |
constants.HV_NIC_TYPE: |
| 501 |
hv_base.ParamInSet(True, constants.HT_KVM_VALID_NIC_TYPES),
|
| 502 |
constants.HV_DISK_TYPE: |
| 503 |
hv_base.ParamInSet(True, constants.HT_KVM_VALID_DISK_TYPES),
|
| 504 |
constants.HV_KVM_CDROM_DISK_TYPE: |
| 505 |
hv_base.ParamInSet(False, constants.HT_KVM_VALID_DISK_TYPES),
|
| 506 |
constants.HV_USB_MOUSE: |
| 507 |
hv_base.ParamInSet(False, constants.HT_KVM_VALID_MOUSE_TYPES),
|
| 508 |
constants.HV_KEYMAP: hv_base.NO_CHECK, |
| 509 |
constants.HV_MIGRATION_PORT: hv_base.REQ_NET_PORT_CHECK, |
| 510 |
constants.HV_MIGRATION_BANDWIDTH: hv_base.REQ_NONNEGATIVE_INT_CHECK, |
| 511 |
constants.HV_MIGRATION_DOWNTIME: hv_base.REQ_NONNEGATIVE_INT_CHECK, |
| 512 |
constants.HV_MIGRATION_MODE: hv_base.MIGRATION_MODE_CHECK, |
| 513 |
constants.HV_USE_LOCALTIME: hv_base.NO_CHECK, |
| 514 |
constants.HV_DISK_CACHE: |
| 515 |
hv_base.ParamInSet(True, constants.HT_VALID_CACHE_TYPES),
|
| 516 |
constants.HV_SECURITY_MODEL: |
| 517 |
hv_base.ParamInSet(True, constants.HT_KVM_VALID_SM_TYPES),
|
| 518 |
constants.HV_SECURITY_DOMAIN: hv_base.NO_CHECK, |
| 519 |
constants.HV_KVM_FLAG: |
| 520 |
hv_base.ParamInSet(False, constants.HT_KVM_FLAG_VALUES),
|
| 521 |
constants.HV_VHOST_NET: hv_base.NO_CHECK, |
| 522 |
constants.HV_KVM_USE_CHROOT: hv_base.NO_CHECK, |
| 523 |
constants.HV_MEM_PATH: hv_base.OPT_DIR_CHECK, |
| 524 |
constants.HV_REBOOT_BEHAVIOR: |
| 525 |
hv_base.ParamInSet(True, constants.REBOOT_BEHAVIORS),
|
| 526 |
constants.HV_CPU_MASK: hv_base.OPT_MULTI_CPU_MASK_CHECK, |
| 527 |
constants.HV_CPU_TYPE: hv_base.NO_CHECK, |
| 528 |
constants.HV_CPU_CORES: hv_base.OPT_NONNEGATIVE_INT_CHECK, |
| 529 |
constants.HV_CPU_THREADS: hv_base.OPT_NONNEGATIVE_INT_CHECK, |
| 530 |
constants.HV_CPU_SOCKETS: hv_base.OPT_NONNEGATIVE_INT_CHECK, |
| 531 |
constants.HV_SOUNDHW: hv_base.NO_CHECK, |
| 532 |
constants.HV_USB_DEVICES: hv_base.NO_CHECK, |
| 533 |
constants.HV_VGA: hv_base.NO_CHECK, |
| 534 |
constants.HV_KVM_EXTRA: hv_base.NO_CHECK, |
| 535 |
constants.HV_KVM_MACHINE_VERSION: hv_base.NO_CHECK, |
| 536 |
constants.HV_VNET_HDR: hv_base.NO_CHECK, |
| 537 |
} |
| 538 |
|
| 539 |
_VIRTIO = "virtio"
|
| 540 |
_VIRTIO_NET_PCI = "virtio-net-pci"
|
| 541 |
|
| 542 |
_MIGRATION_STATUS_RE = re.compile("Migration\s+status:\s+(\w+)",
|
| 543 |
re.M | re.I) |
| 544 |
_MIGRATION_PROGRESS_RE = \ |
| 545 |
re.compile(r"\s*transferred\s+ram:\s+(?P<transferred>\d+)\s+kbytes\s*\n"
|
| 546 |
r"\s*remaining\s+ram:\s+(?P<remaining>\d+)\s+kbytes\s*\n"
|
| 547 |
r"\s*total\s+ram:\s+(?P<total>\d+)\s+kbytes\s*\n", re.I)
|
| 548 |
|
| 549 |
_MIGRATION_INFO_MAX_BAD_ANSWERS = 5
|
| 550 |
_MIGRATION_INFO_RETRY_DELAY = 2
|
| 551 |
|
| 552 |
_VERSION_RE = re.compile(r"\b(\d+)\.(\d+)(\.(\d+))?\b")
|
| 553 |
|
| 554 |
_CPU_INFO_RE = re.compile(r"cpu\s+\#(\d+).*thread_id\s*=\s*(\d+)", re.I)
|
| 555 |
_CPU_INFO_CMD = "info cpus"
|
| 556 |
_CONT_CMD = "cont"
|
| 557 |
|
| 558 |
_DEFAULT_MACHINE_VERSION_RE = re.compile(r"^(\S+).*\(default\)", re.M)
|
| 559 |
_CHECK_MACHINE_VERSION_RE = \ |
| 560 |
staticmethod(lambda x: re.compile(r"^(%s)[ ]+.*PC" % x, re.M)) |
| 561 |
|
| 562 |
_QMP_RE = re.compile(r"^-qmp\s", re.M)
|
| 563 |
_SPICE_RE = re.compile(r"^-spice\s", re.M)
|
| 564 |
_VHOST_RE = re.compile(r"^-net\s.*,vhost=on|off", re.M)
|
| 565 |
_ENABLE_KVM_RE = re.compile(r"^-enable-kvm\s", re.M)
|
| 566 |
_DISABLE_KVM_RE = re.compile(r"^-disable-kvm\s", re.M)
|
| 567 |
_NETDEV_RE = re.compile(r"^-netdev\s", re.M)
|
| 568 |
_DISPLAY_RE = re.compile(r"^-display\s", re.M)
|
| 569 |
_MACHINE_RE = re.compile(r"^-machine\s", re.M)
|
| 570 |
_NEW_VIRTIO_RE = re.compile(r"^name \"%s\"" % _VIRTIO_NET_PCI, re.M)
|
| 571 |
# match -drive.*boot=on|off on different lines, but in between accept only
|
| 572 |
# dashes not preceeded by a new line (which would mean another option
|
| 573 |
# different than -drive is starting)
|
| 574 |
_BOOT_RE = re.compile(r"^-drive\s([^-]|(?<!^)-)*,boot=on\|off", re.M | re.S)
|
| 575 |
|
| 576 |
ANCILLARY_FILES = [ |
| 577 |
_KVM_NETWORK_SCRIPT, |
| 578 |
] |
| 579 |
ANCILLARY_FILES_OPT = [ |
| 580 |
_KVM_NETWORK_SCRIPT, |
| 581 |
] |
| 582 |
|
| 583 |
# Supported kvm options to get output from
|
| 584 |
_KVMOPT_HELP = "help"
|
| 585 |
_KVMOPT_MLIST = "mlist"
|
| 586 |
_KVMOPT_DEVICELIST = "devicelist"
|
| 587 |
|
| 588 |
# Command to execute to get the output from kvm, and whether to
|
| 589 |
# accept the output even on failure.
|
| 590 |
_KVMOPTS_CMDS = {
|
| 591 |
_KVMOPT_HELP: (["--help"], False), |
| 592 |
_KVMOPT_MLIST: (["-M", "?"], False), |
| 593 |
_KVMOPT_DEVICELIST: (["-device", "?"], True), |
| 594 |
} |
| 595 |
|
| 596 |
def __init__(self): |
| 597 |
hv_base.BaseHypervisor.__init__(self)
|
| 598 |
# Let's make sure the directories we need exist, even if the RUN_DIR lives
|
| 599 |
# in a tmpfs filesystem or has been otherwise wiped out.
|
| 600 |
dirs = [(dname, constants.RUN_DIRS_MODE) for dname in self._DIRS] |
| 601 |
utils.EnsureDirs(dirs) |
| 602 |
|
| 603 |
@classmethod
|
| 604 |
def _InstancePidFile(cls, instance_name): |
| 605 |
"""Returns the instance pidfile.
|
| 606 |
|
| 607 |
"""
|
| 608 |
return utils.PathJoin(cls._PIDS_DIR, instance_name)
|
| 609 |
|
| 610 |
@classmethod
|
| 611 |
def _InstanceUidFile(cls, instance_name): |
| 612 |
"""Returns the instance uidfile.
|
| 613 |
|
| 614 |
"""
|
| 615 |
return utils.PathJoin(cls._UIDS_DIR, instance_name)
|
| 616 |
|
| 617 |
@classmethod
|
| 618 |
def _InstancePidInfo(cls, pid): |
| 619 |
"""Check pid file for instance information.
|
| 620 |
|
| 621 |
Check that a pid file is associated with an instance, and retrieve
|
| 622 |
information from its command line.
|
| 623 |
|
| 624 |
@type pid: string or int
|
| 625 |
@param pid: process id of the instance to check
|
| 626 |
@rtype: tuple
|
| 627 |
@return: (instance_name, memory, vcpus)
|
| 628 |
@raise errors.HypervisorError: when an instance cannot be found
|
| 629 |
|
| 630 |
"""
|
| 631 |
alive = utils.IsProcessAlive(pid) |
| 632 |
if not alive: |
| 633 |
raise errors.HypervisorError("Cannot get info for pid %s" % pid) |
| 634 |
|
| 635 |
cmdline_file = utils.PathJoin("/proc", str(pid), "cmdline") |
| 636 |
try:
|
| 637 |
cmdline = utils.ReadFile(cmdline_file) |
| 638 |
except EnvironmentError, err: |
| 639 |
raise errors.HypervisorError("Can't open cmdline file for pid %s: %s" % |
| 640 |
(pid, err)) |
| 641 |
|
| 642 |
instance = None
|
| 643 |
memory = 0
|
| 644 |
vcpus = 0
|
| 645 |
|
| 646 |
arg_list = cmdline.split("\x00")
|
| 647 |
while arg_list:
|
| 648 |
arg = arg_list.pop(0)
|
| 649 |
if arg == "-name": |
| 650 |
instance = arg_list.pop(0)
|
| 651 |
elif arg == "-m": |
| 652 |
memory = int(arg_list.pop(0)) |
| 653 |
elif arg == "-smp": |
| 654 |
vcpus = int(arg_list.pop(0).split(",")[0]) |
| 655 |
|
| 656 |
if instance is None: |
| 657 |
raise errors.HypervisorError("Pid %s doesn't contain a ganeti kvm" |
| 658 |
" instance" % pid)
|
| 659 |
|
| 660 |
return (instance, memory, vcpus)
|
| 661 |
|
| 662 |
def _InstancePidAlive(self, instance_name): |
| 663 |
"""Returns the instance pidfile, pid, and liveness.
|
| 664 |
|
| 665 |
@type instance_name: string
|
| 666 |
@param instance_name: instance name
|
| 667 |
@rtype: tuple
|
| 668 |
@return: (pid file name, pid, liveness)
|
| 669 |
|
| 670 |
"""
|
| 671 |
pidfile = self._InstancePidFile(instance_name)
|
| 672 |
pid = utils.ReadPidFile(pidfile) |
| 673 |
|
| 674 |
alive = False
|
| 675 |
try:
|
| 676 |
cmd_instance = self._InstancePidInfo(pid)[0] |
| 677 |
alive = (cmd_instance == instance_name) |
| 678 |
except errors.HypervisorError:
|
| 679 |
pass
|
| 680 |
|
| 681 |
return (pidfile, pid, alive)
|
| 682 |
|
| 683 |
def _CheckDown(self, instance_name): |
| 684 |
"""Raises an error unless the given instance is down.
|
| 685 |
|
| 686 |
"""
|
| 687 |
alive = self._InstancePidAlive(instance_name)[2] |
| 688 |
if alive:
|
| 689 |
raise errors.HypervisorError("Failed to start instance %s: %s" % |
| 690 |
(instance_name, "already running"))
|
| 691 |
|
| 692 |
@classmethod
|
| 693 |
def _InstanceMonitor(cls, instance_name): |
| 694 |
"""Returns the instance monitor socket name
|
| 695 |
|
| 696 |
"""
|
| 697 |
return utils.PathJoin(cls._CTRL_DIR, "%s.monitor" % instance_name) |
| 698 |
|
| 699 |
@classmethod
|
| 700 |
def _InstanceSerial(cls, instance_name): |
| 701 |
"""Returns the instance serial socket name
|
| 702 |
|
| 703 |
"""
|
| 704 |
return utils.PathJoin(cls._CTRL_DIR, "%s.serial" % instance_name) |
| 705 |
|
| 706 |
@classmethod
|
| 707 |
def _InstanceQmpMonitor(cls, instance_name): |
| 708 |
"""Returns the instance serial QMP socket name
|
| 709 |
|
| 710 |
"""
|
| 711 |
return utils.PathJoin(cls._CTRL_DIR, "%s.qmp" % instance_name) |
| 712 |
|
| 713 |
@staticmethod
|
| 714 |
def _SocatUnixConsoleParams(): |
| 715 |
"""Returns the correct parameters for socat
|
| 716 |
|
| 717 |
If we have a new-enough socat we can use raw mode with an escape character.
|
| 718 |
|
| 719 |
"""
|
| 720 |
if constants.SOCAT_USE_ESCAPE:
|
| 721 |
return "raw,echo=0,escape=%s" % constants.SOCAT_ESCAPE_CODE |
| 722 |
else:
|
| 723 |
return "echo=0,icanon=0" |
| 724 |
|
| 725 |
@classmethod
|
| 726 |
def _InstanceKVMRuntime(cls, instance_name): |
| 727 |
"""Returns the instance KVM runtime filename
|
| 728 |
|
| 729 |
"""
|
| 730 |
return utils.PathJoin(cls._CONF_DIR, "%s.runtime" % instance_name) |
| 731 |
|
| 732 |
@classmethod
|
| 733 |
def _InstanceChrootDir(cls, instance_name): |
| 734 |
"""Returns the name of the KVM chroot dir of the instance
|
| 735 |
|
| 736 |
"""
|
| 737 |
return utils.PathJoin(cls._CHROOT_DIR, instance_name)
|
| 738 |
|
| 739 |
@classmethod
|
| 740 |
def _InstanceNICDir(cls, instance_name): |
| 741 |
"""Returns the name of the directory holding the tap device files for a
|
| 742 |
given instance.
|
| 743 |
|
| 744 |
"""
|
| 745 |
return utils.PathJoin(cls._NICS_DIR, instance_name)
|
| 746 |
|
| 747 |
@classmethod
|
| 748 |
def _InstanceNICFile(cls, instance_name, seq): |
| 749 |
"""Returns the name of the file containing the tap device for a given NIC
|
| 750 |
|
| 751 |
"""
|
| 752 |
return utils.PathJoin(cls._InstanceNICDir(instance_name), str(seq)) |
| 753 |
|
| 754 |
@classmethod
|
| 755 |
def _InstanceKeymapFile(cls, instance_name): |
| 756 |
"""Returns the name of the file containing the keymap for a given instance
|
| 757 |
|
| 758 |
"""
|
| 759 |
return utils.PathJoin(cls._KEYMAP_DIR, instance_name)
|
| 760 |
|
| 761 |
@classmethod
|
| 762 |
def _TryReadUidFile(cls, uid_file): |
| 763 |
"""Try to read a uid file
|
| 764 |
|
| 765 |
"""
|
| 766 |
if os.path.exists(uid_file):
|
| 767 |
try:
|
| 768 |
uid = int(utils.ReadOneLineFile(uid_file))
|
| 769 |
return uid
|
| 770 |
except EnvironmentError: |
| 771 |
logging.warning("Can't read uid file", exc_info=True) |
| 772 |
except (TypeError, ValueError): |
| 773 |
logging.warning("Can't parse uid file contents", exc_info=True) |
| 774 |
return None |
| 775 |
|
| 776 |
@classmethod
|
| 777 |
def _RemoveInstanceRuntimeFiles(cls, pidfile, instance_name): |
| 778 |
"""Removes an instance's rutime sockets/files/dirs.
|
| 779 |
|
| 780 |
"""
|
| 781 |
utils.RemoveFile(pidfile) |
| 782 |
utils.RemoveFile(cls._InstanceMonitor(instance_name)) |
| 783 |
utils.RemoveFile(cls._InstanceSerial(instance_name)) |
| 784 |
utils.RemoveFile(cls._InstanceQmpMonitor(instance_name)) |
| 785 |
utils.RemoveFile(cls._InstanceKVMRuntime(instance_name)) |
| 786 |
utils.RemoveFile(cls._InstanceKeymapFile(instance_name)) |
| 787 |
uid_file = cls._InstanceUidFile(instance_name) |
| 788 |
uid = cls._TryReadUidFile(uid_file) |
| 789 |
utils.RemoveFile(uid_file) |
| 790 |
if uid is not None: |
| 791 |
uidpool.ReleaseUid(uid) |
| 792 |
try:
|
| 793 |
shutil.rmtree(cls._InstanceNICDir(instance_name)) |
| 794 |
except OSError, err: |
| 795 |
if err.errno != errno.ENOENT:
|
| 796 |
raise
|
| 797 |
try:
|
| 798 |
chroot_dir = cls._InstanceChrootDir(instance_name) |
| 799 |
utils.RemoveDir(chroot_dir) |
| 800 |
except OSError, err: |
| 801 |
if err.errno == errno.ENOTEMPTY:
|
| 802 |
# The chroot directory is expected to be empty, but it isn't.
|
| 803 |
new_chroot_dir = tempfile.mkdtemp(dir=cls._CHROOT_QUARANTINE_DIR, |
| 804 |
prefix="%s-%s-" %
|
| 805 |
(instance_name, |
| 806 |
utils.TimestampForFilename())) |
| 807 |
logging.warning("The chroot directory of instance %s can not be"
|
| 808 |
" removed as it is not empty. Moving it to the"
|
| 809 |
" quarantine instead. Please investigate the"
|
| 810 |
" contents (%s) and clean up manually",
|
| 811 |
instance_name, new_chroot_dir) |
| 812 |
utils.RenameFile(chroot_dir, new_chroot_dir) |
| 813 |
else:
|
| 814 |
raise
|
| 815 |
|
| 816 |
@staticmethod
|
| 817 |
def _ConfigureNIC(instance, seq, nic, tap): |
| 818 |
"""Run the network configuration script for a specified NIC
|
| 819 |
|
| 820 |
@param instance: instance we're acting on
|
| 821 |
@type instance: instance object
|
| 822 |
@param seq: nic sequence number
|
| 823 |
@type seq: int
|
| 824 |
@param nic: nic we're acting on
|
| 825 |
@type nic: nic object
|
| 826 |
@param tap: the host's tap interface this NIC corresponds to
|
| 827 |
@type tap: str
|
| 828 |
|
| 829 |
"""
|
| 830 |
if instance.tags:
|
| 831 |
tags = " ".join(instance.tags)
|
| 832 |
else:
|
| 833 |
tags = ""
|
| 834 |
|
| 835 |
env = {
|
| 836 |
"PATH": "%s:/sbin:/usr/sbin" % os.environ["PATH"], |
| 837 |
"INSTANCE": instance.name,
|
| 838 |
"MAC": nic.mac,
|
| 839 |
"MODE": nic.nicparams[constants.NIC_MODE],
|
| 840 |
"INTERFACE": tap,
|
| 841 |
"INTERFACE_INDEX": str(seq), |
| 842 |
"TAGS": tags,
|
| 843 |
} |
| 844 |
|
| 845 |
if nic.ip:
|
| 846 |
env["IP"] = nic.ip
|
| 847 |
|
| 848 |
if nic.nicparams[constants.NIC_LINK]:
|
| 849 |
env["LINK"] = nic.nicparams[constants.NIC_LINK]
|
| 850 |
|
| 851 |
if nic.network:
|
| 852 |
n = objects.Network.FromDict(nic.netinfo) |
| 853 |
env.update(n.HooksDict()) |
| 854 |
|
| 855 |
if nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
|
| 856 |
env["BRIDGE"] = nic.nicparams[constants.NIC_LINK]
|
| 857 |
|
| 858 |
result = utils.RunCmd([pathutils.KVM_IFUP, tap], env=env) |
| 859 |
if result.failed:
|
| 860 |
raise errors.HypervisorError("Failed to configure interface %s: %s;" |
| 861 |
" network configuration script output: %s" %
|
| 862 |
(tap, result.fail_reason, result.output)) |
| 863 |
|
| 864 |
@staticmethod
|
| 865 |
def _VerifyAffinityPackage(): |
| 866 |
if affinity is None: |
| 867 |
raise errors.HypervisorError("affinity Python package not" |
| 868 |
" found; cannot use CPU pinning under KVM")
|
| 869 |
|
| 870 |
@staticmethod
|
| 871 |
def _BuildAffinityCpuMask(cpu_list): |
| 872 |
"""Create a CPU mask suitable for sched_setaffinity from a list of
|
| 873 |
CPUs.
|
| 874 |
|
| 875 |
See man taskset for more info on sched_setaffinity masks.
|
| 876 |
For example: [ 0, 2, 5, 6 ] will return 101 (0x65, 0..01100101).
|
| 877 |
|
| 878 |
@type cpu_list: list of int
|
| 879 |
@param cpu_list: list of physical CPU numbers to map to vCPUs in order
|
| 880 |
@rtype: int
|
| 881 |
@return: a bit mask of CPU affinities
|
| 882 |
|
| 883 |
"""
|
| 884 |
if cpu_list == constants.CPU_PINNING_OFF:
|
| 885 |
return constants.CPU_PINNING_ALL_KVM
|
| 886 |
else:
|
| 887 |
return sum(2 ** cpu for cpu in cpu_list) |
| 888 |
|
| 889 |
@classmethod
|
| 890 |
def _AssignCpuAffinity(cls, cpu_mask, process_id, thread_dict): |
| 891 |
"""Change CPU affinity for running VM according to given CPU mask.
|
| 892 |
|
| 893 |
@param cpu_mask: CPU mask as given by the user. e.g. "0-2,4:all:1,3"
|
| 894 |
@type cpu_mask: string
|
| 895 |
@param process_id: process ID of KVM process. Used to pin entire VM
|
| 896 |
to physical CPUs.
|
| 897 |
@type process_id: int
|
| 898 |
@param thread_dict: map of virtual CPUs to KVM thread IDs
|
| 899 |
@type thread_dict: dict int:int
|
| 900 |
|
| 901 |
"""
|
| 902 |
# Convert the string CPU mask to a list of list of int's
|
| 903 |
cpu_list = utils.ParseMultiCpuMask(cpu_mask) |
| 904 |
|
| 905 |
if len(cpu_list) == 1: |
| 906 |
all_cpu_mapping = cpu_list[0]
|
| 907 |
if all_cpu_mapping == constants.CPU_PINNING_OFF:
|
| 908 |
# If CPU pinning has 1 entry that's "all", then do nothing
|
| 909 |
pass
|
| 910 |
else:
|
| 911 |
# If CPU pinning has one non-all entry, map the entire VM to
|
| 912 |
# one set of physical CPUs
|
| 913 |
cls._VerifyAffinityPackage() |
| 914 |
affinity.set_process_affinity_mask( |
| 915 |
process_id, cls._BuildAffinityCpuMask(all_cpu_mapping)) |
| 916 |
else:
|
| 917 |
# The number of vCPUs mapped should match the number of vCPUs
|
| 918 |
# reported by KVM. This was already verified earlier, so
|
| 919 |
# here only as a sanity check.
|
| 920 |
assert len(thread_dict) == len(cpu_list) |
| 921 |
cls._VerifyAffinityPackage() |
| 922 |
|
| 923 |
# For each vCPU, map it to the proper list of physical CPUs
|
| 924 |
for vcpu, i in zip(cpu_list, range(len(cpu_list))): |
| 925 |
affinity.set_process_affinity_mask(thread_dict[i], |
| 926 |
cls._BuildAffinityCpuMask(vcpu)) |
| 927 |
|
| 928 |
def _GetVcpuThreadIds(self, instance_name): |
| 929 |
"""Get a mapping of vCPU no. to thread IDs for the instance
|
| 930 |
|
| 931 |
@type instance_name: string
|
| 932 |
@param instance_name: instance in question
|
| 933 |
@rtype: dictionary of int:int
|
| 934 |
@return: a dictionary mapping vCPU numbers to thread IDs
|
| 935 |
|
| 936 |
"""
|
| 937 |
result = {}
|
| 938 |
output = self._CallMonitorCommand(instance_name, self._CPU_INFO_CMD) |
| 939 |
for line in output.stdout.splitlines(): |
| 940 |
match = self._CPU_INFO_RE.search(line)
|
| 941 |
if not match: |
| 942 |
continue
|
| 943 |
grp = map(int, match.groups()) |
| 944 |
result[grp[0]] = grp[1] |
| 945 |
|
| 946 |
return result
|
| 947 |
|
| 948 |
def _ExecuteCpuAffinity(self, instance_name, cpu_mask): |
| 949 |
"""Complete CPU pinning.
|
| 950 |
|
| 951 |
@type instance_name: string
|
| 952 |
@param instance_name: name of instance
|
| 953 |
@type cpu_mask: string
|
| 954 |
@param cpu_mask: CPU pinning mask as entered by user
|
| 955 |
|
| 956 |
"""
|
| 957 |
# Get KVM process ID, to be used if need to pin entire VM
|
| 958 |
_, pid, _ = self._InstancePidAlive(instance_name)
|
| 959 |
# Get vCPU thread IDs, to be used if need to pin vCPUs separately
|
| 960 |
thread_dict = self._GetVcpuThreadIds(instance_name)
|
| 961 |
# Run CPU pinning, based on configured mask
|
| 962 |
self._AssignCpuAffinity(cpu_mask, pid, thread_dict)
|
| 963 |
|
| 964 |
def ListInstances(self): |
| 965 |
"""Get the list of running instances.
|
| 966 |
|
| 967 |
We can do this by listing our live instances directory and
|
| 968 |
checking whether the associated kvm process is still alive.
|
| 969 |
|
| 970 |
"""
|
| 971 |
result = [] |
| 972 |
for name in os.listdir(self._PIDS_DIR): |
| 973 |
if self._InstancePidAlive(name)[2]: |
| 974 |
result.append(name) |
| 975 |
return result
|
| 976 |
|
| 977 |
def GetInstanceInfo(self, instance_name): |
| 978 |
"""Get instance properties.
|
| 979 |
|
| 980 |
@type instance_name: string
|
| 981 |
@param instance_name: the instance name
|
| 982 |
@rtype: tuple of strings
|
| 983 |
@return: (name, id, memory, vcpus, stat, times)
|
| 984 |
|
| 985 |
"""
|
| 986 |
_, pid, alive = self._InstancePidAlive(instance_name)
|
| 987 |
if not alive: |
| 988 |
return None |
| 989 |
|
| 990 |
_, memory, vcpus = self._InstancePidInfo(pid)
|
| 991 |
istat = "---b-"
|
| 992 |
times = "0"
|
| 993 |
|
| 994 |
try:
|
| 995 |
qmp = QmpConnection(self._InstanceQmpMonitor(instance_name))
|
| 996 |
qmp.connect() |
| 997 |
vcpus = len(qmp.Execute("query-cpus")[qmp.RETURN_KEY]) |
| 998 |
# Will fail if ballooning is not enabled, but we can then just resort to
|
| 999 |
# the value above.
|
| 1000 |
mem_bytes = qmp.Execute("query-balloon")[qmp.RETURN_KEY][qmp.ACTUAL_KEY]
|
| 1001 |
memory = mem_bytes / 1048576
|
| 1002 |
except errors.HypervisorError:
|
| 1003 |
pass
|
| 1004 |
|
| 1005 |
return (instance_name, pid, memory, vcpus, istat, times)
|
| 1006 |
|
| 1007 |
def GetAllInstancesInfo(self): |
| 1008 |
"""Get properties of all instances.
|
| 1009 |
|
| 1010 |
@return: list of tuples (name, id, memory, vcpus, stat, times)
|
| 1011 |
|
| 1012 |
"""
|
| 1013 |
data = [] |
| 1014 |
for name in os.listdir(self._PIDS_DIR): |
| 1015 |
try:
|
| 1016 |
info = self.GetInstanceInfo(name)
|
| 1017 |
except errors.HypervisorError:
|
| 1018 |
# Ignore exceptions due to instances being shut down
|
| 1019 |
continue
|
| 1020 |
if info:
|
| 1021 |
data.append(info) |
| 1022 |
return data
|
| 1023 |
|
| 1024 |
def _GenerateKVMRuntime(self, instance, block_devices, startup_paused, |
| 1025 |
kvmhelp): |
| 1026 |
"""Generate KVM information to start an instance.
|
| 1027 |
|
| 1028 |
@type kvmhelp: string
|
| 1029 |
@param kvmhelp: output of kvm --help
|
| 1030 |
@attention: this function must not have any side-effects; for
|
| 1031 |
example, it must not write to the filesystem, or read values
|
| 1032 |
from the current system the are expected to differ between
|
| 1033 |
nodes, since it is only run once at instance startup;
|
| 1034 |
actions/kvm arguments that can vary between systems should be
|
| 1035 |
done in L{_ExecuteKVMRuntime}
|
| 1036 |
|
| 1037 |
"""
|
| 1038 |
# pylint: disable=R0912,R0914,R0915
|
| 1039 |
hvp = instance.hvparams |
| 1040 |
self.ValidateParameters(hvp)
|
| 1041 |
|
| 1042 |
pidfile = self._InstancePidFile(instance.name)
|
| 1043 |
kvm = hvp[constants.HV_KVM_PATH] |
| 1044 |
kvm_cmd = [kvm] |
| 1045 |
# used just by the vnc server, if enabled
|
| 1046 |
kvm_cmd.extend(["-name", instance.name])
|
| 1047 |
kvm_cmd.extend(["-m", instance.beparams[constants.BE_MAXMEM]])
|
| 1048 |
|
| 1049 |
smp_list = ["%s" % instance.beparams[constants.BE_VCPUS]]
|
| 1050 |
if hvp[constants.HV_CPU_CORES]:
|
| 1051 |
smp_list.append("cores=%s" % hvp[constants.HV_CPU_CORES])
|
| 1052 |
if hvp[constants.HV_CPU_THREADS]:
|
| 1053 |
smp_list.append("threads=%s" % hvp[constants.HV_CPU_THREADS])
|
| 1054 |
if hvp[constants.HV_CPU_SOCKETS]:
|
| 1055 |
smp_list.append("sockets=%s" % hvp[constants.HV_CPU_SOCKETS])
|
| 1056 |
|
| 1057 |
kvm_cmd.extend(["-smp", ",".join(smp_list)]) |
| 1058 |
|
| 1059 |
kvm_cmd.extend(["-pidfile", pidfile])
|
| 1060 |
kvm_cmd.extend(["-balloon", "virtio"]) |
| 1061 |
kvm_cmd.extend(["-daemonize"])
|
| 1062 |
if not instance.hvparams[constants.HV_ACPI]: |
| 1063 |
kvm_cmd.extend(["-no-acpi"])
|
| 1064 |
if instance.hvparams[constants.HV_REBOOT_BEHAVIOR] == \
|
| 1065 |
constants.INSTANCE_REBOOT_EXIT: |
| 1066 |
kvm_cmd.extend(["-no-reboot"])
|
| 1067 |
|
| 1068 |
mversion = hvp[constants.HV_KVM_MACHINE_VERSION] |
| 1069 |
if not mversion: |
| 1070 |
mversion = self._GetDefaultMachineVersion(kvm)
|
| 1071 |
if self._MACHINE_RE.search(kvmhelp): |
| 1072 |
# TODO (2.8): kernel_irqchip and kvm_shadow_mem machine properties, as
|
| 1073 |
# extra hypervisor parameters. We should also investigate whether and how
|
| 1074 |
# shadow_mem should be considered for the resource model.
|
| 1075 |
if (hvp[constants.HV_KVM_FLAG] == constants.HT_KVM_ENABLED):
|
| 1076 |
specprop = ",accel=kvm"
|
| 1077 |
else:
|
| 1078 |
specprop = ""
|
| 1079 |
machinespec = "%s%s" % (mversion, specprop)
|
| 1080 |
kvm_cmd.extend(["-machine", machinespec])
|
| 1081 |
else:
|
| 1082 |
kvm_cmd.extend(["-M", mversion])
|
| 1083 |
if (hvp[constants.HV_KVM_FLAG] == constants.HT_KVM_ENABLED and |
| 1084 |
self._ENABLE_KVM_RE.search(kvmhelp)):
|
| 1085 |
kvm_cmd.extend(["-enable-kvm"])
|
| 1086 |
elif (hvp[constants.HV_KVM_FLAG] == constants.HT_KVM_DISABLED and |
| 1087 |
self._DISABLE_KVM_RE.search(kvmhelp)):
|
| 1088 |
kvm_cmd.extend(["-disable-kvm"])
|
| 1089 |
|
| 1090 |
kernel_path = hvp[constants.HV_KERNEL_PATH] |
| 1091 |
if kernel_path:
|
| 1092 |
boot_disk = boot_cdrom = boot_floppy = boot_network = False
|
| 1093 |
else:
|
| 1094 |
boot_disk = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_DISK |
| 1095 |
boot_cdrom = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_CDROM |
| 1096 |
boot_floppy = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_FLOPPY |
| 1097 |
boot_network = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_NETWORK |
| 1098 |
|
| 1099 |
if startup_paused:
|
| 1100 |
kvm_cmd.extend([_KVM_START_PAUSED_FLAG]) |
| 1101 |
|
| 1102 |
if boot_network:
|
| 1103 |
kvm_cmd.extend(["-boot", "n"]) |
| 1104 |
|
| 1105 |
# whether this is an older KVM version that uses the boot=on flag
|
| 1106 |
# on devices
|
| 1107 |
needs_boot_flag = self._BOOT_RE.search(kvmhelp)
|
| 1108 |
|
| 1109 |
disk_type = hvp[constants.HV_DISK_TYPE] |
| 1110 |
if disk_type == constants.HT_DISK_PARAVIRTUAL:
|
| 1111 |
if_val = ",if=virtio"
|
| 1112 |
else:
|
| 1113 |
if_val = ",if=%s" % disk_type
|
| 1114 |
# Cache mode
|
| 1115 |
disk_cache = hvp[constants.HV_DISK_CACHE] |
| 1116 |
if instance.disk_template in constants.DTS_EXT_MIRROR: |
| 1117 |
if disk_cache != "none": |
| 1118 |
# TODO: make this a hard error, instead of a silent overwrite
|
| 1119 |
logging.warning("KVM: overriding disk_cache setting '%s' with 'none'"
|
| 1120 |
" to prevent shared storage corruption on migration",
|
| 1121 |
disk_cache) |
| 1122 |
cache_val = ",cache=none"
|
| 1123 |
elif disk_cache != constants.HT_CACHE_DEFAULT:
|
| 1124 |
cache_val = ",cache=%s" % disk_cache
|
| 1125 |
else:
|
| 1126 |
cache_val = ""
|
| 1127 |
for cfdev, dev_path in block_devices: |
| 1128 |
if cfdev.mode != constants.DISK_RDWR:
|
| 1129 |
raise errors.HypervisorError("Instance has read-only disks which" |
| 1130 |
" are not supported by KVM")
|
| 1131 |
# TODO: handle FD_LOOP and FD_BLKTAP (?)
|
| 1132 |
boot_val = ""
|
| 1133 |
if boot_disk:
|
| 1134 |
kvm_cmd.extend(["-boot", "c"]) |
| 1135 |
boot_disk = False
|
| 1136 |
if needs_boot_flag and disk_type != constants.HT_DISK_IDE: |
| 1137 |
boot_val = ",boot=on"
|
| 1138 |
|
| 1139 |
drive_val = "file=%s,format=raw%s%s%s" % (dev_path, if_val, boot_val,
|
| 1140 |
cache_val) |
| 1141 |
kvm_cmd.extend(["-drive", drive_val])
|
| 1142 |
|
| 1143 |
#Now we can specify a different device type for CDROM devices.
|
| 1144 |
cdrom_disk_type = hvp[constants.HV_KVM_CDROM_DISK_TYPE] |
| 1145 |
if not cdrom_disk_type: |
| 1146 |
cdrom_disk_type = disk_type |
| 1147 |
|
| 1148 |
iso_image = hvp[constants.HV_CDROM_IMAGE_PATH] |
| 1149 |
if iso_image:
|
| 1150 |
options = ",format=raw,media=cdrom"
|
| 1151 |
# set cdrom 'if' type
|
| 1152 |
if boot_cdrom:
|
| 1153 |
actual_cdrom_type = constants.HT_DISK_IDE |
| 1154 |
elif cdrom_disk_type == constants.HT_DISK_PARAVIRTUAL:
|
| 1155 |
actual_cdrom_type = "virtio"
|
| 1156 |
else:
|
| 1157 |
actual_cdrom_type = cdrom_disk_type |
| 1158 |
if_val = ",if=%s" % actual_cdrom_type
|
| 1159 |
# set boot flag, if needed
|
| 1160 |
boot_val = ""
|
| 1161 |
if boot_cdrom:
|
| 1162 |
kvm_cmd.extend(["-boot", "d"]) |
| 1163 |
if needs_boot_flag:
|
| 1164 |
boot_val = ",boot=on"
|
| 1165 |
# and finally build the entire '-drive' value
|
| 1166 |
drive_val = "file=%s%s%s%s" % (iso_image, options, if_val, boot_val)
|
| 1167 |
kvm_cmd.extend(["-drive", drive_val])
|
| 1168 |
|
| 1169 |
iso_image2 = hvp[constants.HV_KVM_CDROM2_IMAGE_PATH] |
| 1170 |
if iso_image2:
|
| 1171 |
options = ",format=raw,media=cdrom"
|
| 1172 |
if cdrom_disk_type == constants.HT_DISK_PARAVIRTUAL:
|
| 1173 |
if_val = ",if=virtio"
|
| 1174 |
else:
|
| 1175 |
if_val = ",if=%s" % cdrom_disk_type
|
| 1176 |
drive_val = "file=%s%s%s" % (iso_image2, options, if_val)
|
| 1177 |
kvm_cmd.extend(["-drive", drive_val])
|
| 1178 |
|
| 1179 |
floppy_image = hvp[constants.HV_KVM_FLOPPY_IMAGE_PATH] |
| 1180 |
if floppy_image:
|
| 1181 |
options = ",format=raw,media=disk"
|
| 1182 |
if boot_floppy:
|
| 1183 |
kvm_cmd.extend(["-boot", "a"]) |
| 1184 |
options = "%s,boot=on" % options
|
| 1185 |
if_val = ",if=floppy"
|
| 1186 |
options = "%s%s" % (options, if_val)
|
| 1187 |
drive_val = "file=%s%s" % (floppy_image, options)
|
| 1188 |
kvm_cmd.extend(["-drive", drive_val])
|
| 1189 |
|
| 1190 |
if kernel_path:
|
| 1191 |
kvm_cmd.extend(["-kernel", kernel_path])
|
| 1192 |
initrd_path = hvp[constants.HV_INITRD_PATH] |
| 1193 |
if initrd_path:
|
| 1194 |
kvm_cmd.extend(["-initrd", initrd_path])
|
| 1195 |
root_append = ["root=%s" % hvp[constants.HV_ROOT_PATH],
|
| 1196 |
hvp[constants.HV_KERNEL_ARGS]] |
| 1197 |
if hvp[constants.HV_SERIAL_CONSOLE]:
|
| 1198 |
serial_speed = hvp[constants.HV_SERIAL_SPEED] |
| 1199 |
root_append.append("console=ttyS0,%s" % serial_speed)
|
| 1200 |
kvm_cmd.extend(["-append", " ".join(root_append)]) |
| 1201 |
|
| 1202 |
mem_path = hvp[constants.HV_MEM_PATH] |
| 1203 |
if mem_path:
|
| 1204 |
kvm_cmd.extend(["-mem-path", mem_path, "-mem-prealloc"]) |
| 1205 |
|
| 1206 |
monitor_dev = ("unix:%s,server,nowait" %
|
| 1207 |
self._InstanceMonitor(instance.name))
|
| 1208 |
kvm_cmd.extend(["-monitor", monitor_dev])
|
| 1209 |
if hvp[constants.HV_SERIAL_CONSOLE]:
|
| 1210 |
serial_dev = ("unix:%s,server,nowait" %
|
| 1211 |
self._InstanceSerial(instance.name))
|
| 1212 |
kvm_cmd.extend(["-serial", serial_dev])
|
| 1213 |
else:
|
| 1214 |
kvm_cmd.extend(["-serial", "none"]) |
| 1215 |
|
| 1216 |
mouse_type = hvp[constants.HV_USB_MOUSE] |
| 1217 |
vnc_bind_address = hvp[constants.HV_VNC_BIND_ADDRESS] |
| 1218 |
spice_bind = hvp[constants.HV_KVM_SPICE_BIND] |
| 1219 |
spice_ip_version = None
|
| 1220 |
|
| 1221 |
kvm_cmd.extend(["-usb"])
|
| 1222 |
|
| 1223 |
if mouse_type:
|
| 1224 |
kvm_cmd.extend(["-usbdevice", mouse_type])
|
| 1225 |
elif vnc_bind_address:
|
| 1226 |
kvm_cmd.extend(["-usbdevice", constants.HT_MOUSE_TABLET])
|
| 1227 |
|
| 1228 |
if vnc_bind_address:
|
| 1229 |
if netutils.IP4Address.IsValid(vnc_bind_address):
|
| 1230 |
if instance.network_port > constants.VNC_BASE_PORT:
|
| 1231 |
display = instance.network_port - constants.VNC_BASE_PORT |
| 1232 |
if vnc_bind_address == constants.IP4_ADDRESS_ANY:
|
| 1233 |
vnc_arg = ":%d" % (display)
|
| 1234 |
else:
|
| 1235 |
vnc_arg = "%s:%d" % (vnc_bind_address, display)
|
| 1236 |
else:
|
| 1237 |
logging.error("Network port is not a valid VNC display (%d < %d),"
|
| 1238 |
" not starting VNC",
|
| 1239 |
instance.network_port, constants.VNC_BASE_PORT) |
| 1240 |
vnc_arg = "none"
|
| 1241 |
|
| 1242 |
# Only allow tls and other option when not binding to a file, for now.
|
| 1243 |
# kvm/qemu gets confused otherwise about the filename to use.
|
| 1244 |
vnc_append = ""
|
| 1245 |
if hvp[constants.HV_VNC_TLS]:
|
| 1246 |
vnc_append = "%s,tls" % vnc_append
|
| 1247 |
if hvp[constants.HV_VNC_X509_VERIFY]:
|
| 1248 |
vnc_append = "%s,x509verify=%s" % (vnc_append,
|
| 1249 |
hvp[constants.HV_VNC_X509]) |
| 1250 |
elif hvp[constants.HV_VNC_X509]:
|
| 1251 |
vnc_append = "%s,x509=%s" % (vnc_append,
|
| 1252 |
hvp[constants.HV_VNC_X509]) |
| 1253 |
if hvp[constants.HV_VNC_PASSWORD_FILE]:
|
| 1254 |
vnc_append = "%s,password" % vnc_append
|
| 1255 |
|
| 1256 |
vnc_arg = "%s%s" % (vnc_arg, vnc_append)
|
| 1257 |
|
| 1258 |
else:
|
| 1259 |
vnc_arg = "unix:%s/%s.vnc" % (vnc_bind_address, instance.name)
|
| 1260 |
|
| 1261 |
kvm_cmd.extend(["-vnc", vnc_arg])
|
| 1262 |
elif spice_bind:
|
| 1263 |
# FIXME: this is wrong here; the iface ip address differs
|
| 1264 |
# between systems, so it should be done in _ExecuteKVMRuntime
|
| 1265 |
if netutils.IsValidInterface(spice_bind):
|
| 1266 |
# The user specified a network interface, we have to figure out the IP
|
| 1267 |
# address.
|
| 1268 |
addresses = netutils.GetInterfaceIpAddresses(spice_bind) |
| 1269 |
spice_ip_version = hvp[constants.HV_KVM_SPICE_IP_VERSION] |
| 1270 |
|
| 1271 |
# if the user specified an IP version and the interface does not
|
| 1272 |
# have that kind of IP addresses, throw an exception
|
| 1273 |
if spice_ip_version != constants.IFACE_NO_IP_VERSION_SPECIFIED:
|
| 1274 |
if not addresses[spice_ip_version]: |
| 1275 |
raise errors.HypervisorError("SPICE: Unable to get an IPv%s address" |
| 1276 |
" for %s" % (spice_ip_version,
|
| 1277 |
spice_bind)) |
| 1278 |
|
| 1279 |
# the user did not specify an IP version, we have to figure it out
|
| 1280 |
elif (addresses[constants.IP4_VERSION] and |
| 1281 |
addresses[constants.IP6_VERSION]): |
| 1282 |
# we have both ipv4 and ipv6, let's use the cluster default IP
|
| 1283 |
# version
|
| 1284 |
cluster_family = ssconf.SimpleStore().GetPrimaryIPFamily() |
| 1285 |
spice_ip_version = \ |
| 1286 |
netutils.IPAddress.GetVersionFromAddressFamily(cluster_family) |
| 1287 |
elif addresses[constants.IP4_VERSION]:
|
| 1288 |
spice_ip_version = constants.IP4_VERSION |
| 1289 |
elif addresses[constants.IP6_VERSION]:
|
| 1290 |
spice_ip_version = constants.IP6_VERSION |
| 1291 |
else:
|
| 1292 |
raise errors.HypervisorError("SPICE: Unable to get an IP address" |
| 1293 |
" for %s" % (spice_bind))
|
| 1294 |
|
| 1295 |
spice_address = addresses[spice_ip_version][0]
|
| 1296 |
|
| 1297 |
else:
|
| 1298 |
# spice_bind is known to be a valid IP address, because
|
| 1299 |
# ValidateParameters checked it.
|
| 1300 |
spice_address = spice_bind |
| 1301 |
|
| 1302 |
spice_arg = "addr=%s" % spice_address
|
| 1303 |
if hvp[constants.HV_KVM_SPICE_USE_TLS]:
|
| 1304 |
spice_arg = ("%s,tls-port=%s,x509-cacert-file=%s" %
|
| 1305 |
(spice_arg, instance.network_port, |
| 1306 |
pathutils.SPICE_CACERT_FILE)) |
| 1307 |
spice_arg = ("%s,x509-key-file=%s,x509-cert-file=%s" %
|
| 1308 |
(spice_arg, pathutils.SPICE_CERT_FILE, |
| 1309 |
pathutils.SPICE_CERT_FILE)) |
| 1310 |
tls_ciphers = hvp[constants.HV_KVM_SPICE_TLS_CIPHERS] |
| 1311 |
if tls_ciphers:
|
| 1312 |
spice_arg = "%s,tls-ciphers=%s" % (spice_arg, tls_ciphers)
|
| 1313 |
else:
|
| 1314 |
spice_arg = "%s,port=%s" % (spice_arg, instance.network_port)
|
| 1315 |
|
| 1316 |
if not hvp[constants.HV_KVM_SPICE_PASSWORD_FILE]: |
| 1317 |
spice_arg = "%s,disable-ticketing" % spice_arg
|
| 1318 |
|
| 1319 |
if spice_ip_version:
|
| 1320 |
spice_arg = "%s,ipv%s" % (spice_arg, spice_ip_version)
|
| 1321 |
|
| 1322 |
# Image compression options
|
| 1323 |
img_lossless = hvp[constants.HV_KVM_SPICE_LOSSLESS_IMG_COMPR] |
| 1324 |
img_jpeg = hvp[constants.HV_KVM_SPICE_JPEG_IMG_COMPR] |
| 1325 |
img_zlib_glz = hvp[constants.HV_KVM_SPICE_ZLIB_GLZ_IMG_COMPR] |
| 1326 |
if img_lossless:
|
| 1327 |
spice_arg = "%s,image-compression=%s" % (spice_arg, img_lossless)
|
| 1328 |
if img_jpeg:
|
| 1329 |
spice_arg = "%s,jpeg-wan-compression=%s" % (spice_arg, img_jpeg)
|
| 1330 |
if img_zlib_glz:
|
| 1331 |
spice_arg = "%s,zlib-glz-wan-compression=%s" % (spice_arg, img_zlib_glz)
|
| 1332 |
|
| 1333 |
# Video stream detection
|
| 1334 |
video_streaming = hvp[constants.HV_KVM_SPICE_STREAMING_VIDEO_DETECTION] |
| 1335 |
if video_streaming:
|
| 1336 |
spice_arg = "%s,streaming-video=%s" % (spice_arg, video_streaming)
|
| 1337 |
|
| 1338 |
# Audio compression, by default in qemu-kvm it is on
|
| 1339 |
if not hvp[constants.HV_KVM_SPICE_AUDIO_COMPR]: |
| 1340 |
spice_arg = "%s,playback-compression=off" % spice_arg
|
| 1341 |
if not hvp[constants.HV_KVM_SPICE_USE_VDAGENT]: |
| 1342 |
spice_arg = "%s,agent-mouse=off" % spice_arg
|
| 1343 |
else:
|
| 1344 |
# Enable the spice agent communication channel between the host and the
|
| 1345 |
# agent.
|
| 1346 |
kvm_cmd.extend(["-device", "virtio-serial-pci"]) |
| 1347 |
kvm_cmd.extend([ |
| 1348 |
"-device",
|
| 1349 |
"virtserialport,chardev=spicechannel0,name=com.redhat.spice.0",
|
| 1350 |
]) |
| 1351 |
kvm_cmd.extend(["-chardev", "spicevmc,id=spicechannel0,name=vdagent"]) |
| 1352 |
|
| 1353 |
logging.info("KVM: SPICE will listen on port %s", instance.network_port)
|
| 1354 |
kvm_cmd.extend(["-spice", spice_arg])
|
| 1355 |
|
| 1356 |
else:
|
| 1357 |
# From qemu 1.4 -nographic is incompatible with -daemonize. The new way
|
| 1358 |
# also works in earlier versions though (tested with 1.1 and 1.3)
|
| 1359 |
if self._DISPLAY_RE.search(kvmhelp): |
| 1360 |
kvm_cmd.extend(["-display", "none"]) |
| 1361 |
else:
|
| 1362 |
kvm_cmd.extend(["-nographic"])
|
| 1363 |
|
| 1364 |
if hvp[constants.HV_USE_LOCALTIME]:
|
| 1365 |
kvm_cmd.extend(["-localtime"])
|
| 1366 |
|
| 1367 |
if hvp[constants.HV_KVM_USE_CHROOT]:
|
| 1368 |
kvm_cmd.extend(["-chroot", self._InstanceChrootDir(instance.name)]) |
| 1369 |
|
| 1370 |
# Add qemu-KVM -cpu param
|
| 1371 |
if hvp[constants.HV_CPU_TYPE]:
|
| 1372 |
kvm_cmd.extend(["-cpu", hvp[constants.HV_CPU_TYPE]])
|
| 1373 |
|
| 1374 |
# As requested by music lovers
|
| 1375 |
if hvp[constants.HV_SOUNDHW]:
|
| 1376 |
kvm_cmd.extend(["-soundhw", hvp[constants.HV_SOUNDHW]])
|
| 1377 |
|
| 1378 |
# Pass a -vga option if requested, or if spice is used, for backwards
|
| 1379 |
# compatibility.
|
| 1380 |
if hvp[constants.HV_VGA]:
|
| 1381 |
kvm_cmd.extend(["-vga", hvp[constants.HV_VGA]])
|
| 1382 |
elif spice_bind:
|
| 1383 |
kvm_cmd.extend(["-vga", "qxl"]) |
| 1384 |
|
| 1385 |
# Various types of usb devices, comma separated
|
| 1386 |
if hvp[constants.HV_USB_DEVICES]:
|
| 1387 |
for dev in hvp[constants.HV_USB_DEVICES].split(" "): |
| 1388 |
kvm_cmd.extend(["-usbdevice", dev])
|
| 1389 |
|
| 1390 |
if hvp[constants.HV_KVM_EXTRA]:
|
| 1391 |
kvm_cmd.extend(hvp[constants.HV_KVM_EXTRA].split(" "))
|
| 1392 |
|
| 1393 |
# Save the current instance nics, but defer their expansion as parameters,
|
| 1394 |
# as we'll need to generate executable temp files for them.
|
| 1395 |
kvm_nics = instance.nics |
| 1396 |
hvparams = hvp |
| 1397 |
|
| 1398 |
return (kvm_cmd, kvm_nics, hvparams)
|
| 1399 |
|
| 1400 |
def _WriteKVMRuntime(self, instance_name, data): |
| 1401 |
"""Write an instance's KVM runtime
|
| 1402 |
|
| 1403 |
"""
|
| 1404 |
try:
|
| 1405 |
utils.WriteFile(self._InstanceKVMRuntime(instance_name),
|
| 1406 |
data=data) |
| 1407 |
except EnvironmentError, err: |
| 1408 |
raise errors.HypervisorError("Failed to save KVM runtime file: %s" % err) |
| 1409 |
|
| 1410 |
def _ReadKVMRuntime(self, instance_name): |
| 1411 |
"""Read an instance's KVM runtime
|
| 1412 |
|
| 1413 |
"""
|
| 1414 |
try:
|
| 1415 |
file_content = utils.ReadFile(self._InstanceKVMRuntime(instance_name))
|
| 1416 |
except EnvironmentError, err: |
| 1417 |
raise errors.HypervisorError("Failed to load KVM runtime file: %s" % err) |
| 1418 |
return file_content
|
| 1419 |
|
| 1420 |
def _SaveKVMRuntime(self, instance, kvm_runtime): |
| 1421 |
"""Save an instance's KVM runtime
|
| 1422 |
|
| 1423 |
"""
|
| 1424 |
kvm_cmd, kvm_nics, hvparams = kvm_runtime |
| 1425 |
serialized_nics = [nic.ToDict() for nic in kvm_nics] |
| 1426 |
serialized_form = serializer.Dump((kvm_cmd, serialized_nics, hvparams)) |
| 1427 |
self._WriteKVMRuntime(instance.name, serialized_form)
|
| 1428 |
|
| 1429 |
def _LoadKVMRuntime(self, instance, serialized_runtime=None): |
| 1430 |
"""Load an instance's KVM runtime
|
| 1431 |
|
| 1432 |
"""
|
| 1433 |
if not serialized_runtime: |
| 1434 |
serialized_runtime = self._ReadKVMRuntime(instance.name)
|
| 1435 |
loaded_runtime = serializer.Load(serialized_runtime) |
| 1436 |
kvm_cmd, serialized_nics, hvparams = loaded_runtime |
| 1437 |
kvm_nics = [objects.NIC.FromDict(snic) for snic in serialized_nics] |
| 1438 |
return (kvm_cmd, kvm_nics, hvparams)
|
| 1439 |
|
| 1440 |
def _RunKVMCmd(self, name, kvm_cmd, tap_fds=None): |
| 1441 |
"""Run the KVM cmd and check for errors
|
| 1442 |
|
| 1443 |
@type name: string
|
| 1444 |
@param name: instance name
|
| 1445 |
@type kvm_cmd: list of strings
|
| 1446 |
@param kvm_cmd: runcmd input for kvm
|
| 1447 |
@type tap_fds: list of int
|
| 1448 |
@param tap_fds: fds of tap devices opened by Ganeti
|
| 1449 |
|
| 1450 |
"""
|
| 1451 |
try:
|
| 1452 |
result = utils.RunCmd(kvm_cmd, noclose_fds=tap_fds) |
| 1453 |
finally:
|
| 1454 |
for fd in tap_fds: |
| 1455 |
utils_wrapper.CloseFdNoError(fd) |
| 1456 |
|
| 1457 |
if result.failed:
|
| 1458 |
raise errors.HypervisorError("Failed to start instance %s: %s (%s)" % |
| 1459 |
(name, result.fail_reason, result.output)) |
| 1460 |
if not self._InstancePidAlive(name)[2]: |
| 1461 |
raise errors.HypervisorError("Failed to start instance %s" % name) |
| 1462 |
|
| 1463 |
def _ExecuteKVMRuntime(self, instance, kvm_runtime, kvmhelp, incoming=None): |
| 1464 |
"""Execute a KVM cmd, after completing it with some last minute data.
|
| 1465 |
|
| 1466 |
@type incoming: tuple of strings
|
| 1467 |
@param incoming: (target_host_ip, port)
|
| 1468 |
@type kvmhelp: string
|
| 1469 |
@param kvmhelp: output of kvm --help
|
| 1470 |
|
| 1471 |
"""
|
| 1472 |
# Small _ExecuteKVMRuntime hv parameters programming howto:
|
| 1473 |
# - conf_hvp contains the parameters as configured on ganeti. they might
|
| 1474 |
# have changed since the instance started; only use them if the change
|
| 1475 |
# won't affect the inside of the instance (which hasn't been rebooted).
|
| 1476 |
# - up_hvp contains the parameters as they were when the instance was
|
| 1477 |
# started, plus any new parameter which has been added between ganeti
|
| 1478 |
# versions: it is paramount that those default to a value which won't
|
| 1479 |
# affect the inside of the instance as well.
|
| 1480 |
conf_hvp = instance.hvparams |
| 1481 |
name = instance.name |
| 1482 |
self._CheckDown(name)
|
| 1483 |
|
| 1484 |
temp_files = [] |
| 1485 |
|
| 1486 |
kvm_cmd, kvm_nics, up_hvp = kvm_runtime |
| 1487 |
# the first element of kvm_cmd is always the path to the kvm binary
|
| 1488 |
kvm_path = kvm_cmd[0]
|
| 1489 |
up_hvp = objects.FillDict(conf_hvp, up_hvp) |
| 1490 |
|
| 1491 |
# We know it's safe to run as a different user upon migration, so we'll use
|
| 1492 |
# the latest conf, from conf_hvp.
|
| 1493 |
security_model = conf_hvp[constants.HV_SECURITY_MODEL] |
| 1494 |
if security_model == constants.HT_SM_USER:
|
| 1495 |
kvm_cmd.extend(["-runas", conf_hvp[constants.HV_SECURITY_DOMAIN]])
|
| 1496 |
|
| 1497 |
keymap = conf_hvp[constants.HV_KEYMAP] |
| 1498 |
if keymap:
|
| 1499 |
keymap_path = self._InstanceKeymapFile(name)
|
| 1500 |
# If a keymap file is specified, KVM won't use its internal defaults. By
|
| 1501 |
# first including the "en-us" layout, an error on loading the actual
|
| 1502 |
# layout (e.g. because it can't be found) won't lead to a non-functional
|
| 1503 |
# keyboard. A keyboard with incorrect keys is still better than none.
|
| 1504 |
utils.WriteFile(keymap_path, data="include en-us\ninclude %s\n" % keymap)
|
| 1505 |
kvm_cmd.extend(["-k", keymap_path])
|
| 1506 |
|
| 1507 |
# We have reasons to believe changing something like the nic driver/type
|
| 1508 |
# upon migration won't exactly fly with the instance kernel, so for nic
|
| 1509 |
# related parameters we'll use up_hvp
|
| 1510 |
tapfds = [] |
| 1511 |
taps = [] |
| 1512 |
if not kvm_nics: |
| 1513 |
kvm_cmd.extend(["-net", "none"]) |
| 1514 |
else:
|
| 1515 |
vnet_hdr = False
|
| 1516 |
tap_extra = ""
|
| 1517 |
nic_type = up_hvp[constants.HV_NIC_TYPE] |
| 1518 |
if nic_type == constants.HT_NIC_PARAVIRTUAL:
|
| 1519 |
nic_model = self._VIRTIO
|
| 1520 |
try:
|
| 1521 |
devlist = self._GetKVMOutput(kvm_path, self._KVMOPT_DEVICELIST) |
| 1522 |
if self._NEW_VIRTIO_RE.search(devlist): |
| 1523 |
nic_model = self._VIRTIO_NET_PCI
|
| 1524 |
vnet_hdr = up_hvp[constants.HV_VNET_HDR] |
| 1525 |
except errors.HypervisorError, _:
|
| 1526 |
# Older versions of kvm don't support DEVICE_LIST, but they don't
|
| 1527 |
# have new virtio syntax either.
|
| 1528 |
pass
|
| 1529 |
|
| 1530 |
if up_hvp[constants.HV_VHOST_NET]:
|
| 1531 |
# check for vhost_net support
|
| 1532 |
if self._VHOST_RE.search(kvmhelp): |
| 1533 |
tap_extra = ",vhost=on"
|
| 1534 |
else:
|
| 1535 |
raise errors.HypervisorError("vhost_net is configured" |
| 1536 |
" but it is not available")
|
| 1537 |
else:
|
| 1538 |
nic_model = nic_type |
| 1539 |
|
| 1540 |
kvm_supports_netdev = self._NETDEV_RE.search(kvmhelp)
|
| 1541 |
|
| 1542 |
for nic_seq, nic in enumerate(kvm_nics): |
| 1543 |
tapname, tapfd = _OpenTap(vnet_hdr=vnet_hdr) |
| 1544 |
tapfds.append(tapfd) |
| 1545 |
taps.append(tapname) |
| 1546 |
if kvm_supports_netdev:
|
| 1547 |
nic_val = "%s,mac=%s,netdev=netdev%s" % (nic_model, nic.mac, nic_seq)
|
| 1548 |
tap_val = "type=tap,id=netdev%s,fd=%d%s" % (nic_seq, tapfd, tap_extra)
|
| 1549 |
kvm_cmd.extend(["-netdev", tap_val, "-device", nic_val]) |
| 1550 |
else:
|
| 1551 |
nic_val = "nic,vlan=%s,macaddr=%s,model=%s" % (nic_seq,
|
| 1552 |
nic.mac, nic_model) |
| 1553 |
tap_val = "tap,vlan=%s,fd=%d" % (nic_seq, tapfd)
|
| 1554 |
kvm_cmd.extend(["-net", tap_val, "-net", nic_val]) |
| 1555 |
|
| 1556 |
if incoming:
|
| 1557 |
target, port = incoming |
| 1558 |
kvm_cmd.extend(["-incoming", "tcp:%s:%s" % (target, port)]) |
| 1559 |
|
| 1560 |
# Changing the vnc password doesn't bother the guest that much. At most it
|
| 1561 |
# will surprise people who connect to it. Whether positively or negatively
|
| 1562 |
# it's debatable.
|
| 1563 |
vnc_pwd_file = conf_hvp[constants.HV_VNC_PASSWORD_FILE] |
| 1564 |
vnc_pwd = None
|
| 1565 |
if vnc_pwd_file:
|
| 1566 |
try:
|
| 1567 |
vnc_pwd = utils.ReadOneLineFile(vnc_pwd_file, strict=True)
|
| 1568 |
except EnvironmentError, err: |
| 1569 |
raise errors.HypervisorError("Failed to open VNC password file %s: %s" |
| 1570 |
% (vnc_pwd_file, err)) |
| 1571 |
|
| 1572 |
if conf_hvp[constants.HV_KVM_USE_CHROOT]:
|
| 1573 |
utils.EnsureDirs([(self._InstanceChrootDir(name),
|
| 1574 |
constants.SECURE_DIR_MODE)]) |
| 1575 |
|
| 1576 |
# Automatically enable QMP if version is >= 0.14
|
| 1577 |
if self._QMP_RE.search(kvmhelp): |
| 1578 |
logging.debug("Enabling QMP")
|
| 1579 |
kvm_cmd.extend(["-qmp", "unix:%s,server,nowait" % |
| 1580 |
self._InstanceQmpMonitor(instance.name)])
|
| 1581 |
|
| 1582 |
# Configure the network now for starting instances and bridged interfaces,
|
| 1583 |
# during FinalizeMigration for incoming instances' routed interfaces
|
| 1584 |
for nic_seq, nic in enumerate(kvm_nics): |
| 1585 |
if (incoming and |
| 1586 |
nic.nicparams[constants.NIC_MODE] != constants.NIC_MODE_BRIDGED): |
| 1587 |
continue
|
| 1588 |
self._ConfigureNIC(instance, nic_seq, nic, taps[nic_seq])
|
| 1589 |
|
| 1590 |
# CPU affinity requires kvm to start paused, so we set this flag if the
|
| 1591 |
# instance is not already paused and if we are not going to accept a
|
| 1592 |
# migrating instance. In the latter case, pausing is not needed.
|
| 1593 |
start_kvm_paused = not (_KVM_START_PAUSED_FLAG in kvm_cmd) and not incoming |
| 1594 |
if start_kvm_paused:
|
| 1595 |
kvm_cmd.extend([_KVM_START_PAUSED_FLAG]) |
| 1596 |
|
| 1597 |
# Note: CPU pinning is using up_hvp since changes take effect
|
| 1598 |
# during instance startup anyway, and to avoid problems when soft
|
| 1599 |
# rebooting the instance.
|
| 1600 |
cpu_pinning = False
|
| 1601 |
if up_hvp.get(constants.HV_CPU_MASK, None): |
| 1602 |
cpu_pinning = True
|
| 1603 |
|
| 1604 |
if security_model == constants.HT_SM_POOL:
|
| 1605 |
ss = ssconf.SimpleStore() |
| 1606 |
uid_pool = uidpool.ParseUidPool(ss.GetUidPool(), separator="\n")
|
| 1607 |
all_uids = set(uidpool.ExpandUidPool(uid_pool))
|
| 1608 |
uid = uidpool.RequestUnusedUid(all_uids) |
| 1609 |
try:
|
| 1610 |
username = pwd.getpwuid(uid.GetUid()).pw_name |
| 1611 |
kvm_cmd.extend(["-runas", username])
|
| 1612 |
self._RunKVMCmd(name, kvm_cmd, tapfds)
|
| 1613 |
except:
|
| 1614 |
uidpool.ReleaseUid(uid) |
| 1615 |
raise
|
| 1616 |
else:
|
| 1617 |
uid.Unlock() |
| 1618 |
utils.WriteFile(self._InstanceUidFile(name), data=uid.AsStr())
|
| 1619 |
else:
|
| 1620 |
self._RunKVMCmd(name, kvm_cmd, tapfds)
|
| 1621 |
|
| 1622 |
utils.EnsureDirs([(self._InstanceNICDir(instance.name),
|
| 1623 |
constants.RUN_DIRS_MODE)]) |
| 1624 |
for nic_seq, tap in enumerate(taps): |
| 1625 |
utils.WriteFile(self._InstanceNICFile(instance.name, nic_seq),
|
| 1626 |
data=tap) |
| 1627 |
|
| 1628 |
if vnc_pwd:
|
| 1629 |
change_cmd = "change vnc password %s" % vnc_pwd
|
| 1630 |
self._CallMonitorCommand(instance.name, change_cmd)
|
| 1631 |
|
| 1632 |
# Setting SPICE password. We are not vulnerable to malicious passwordless
|
| 1633 |
# connection attempts because SPICE by default does not allow connections
|
| 1634 |
# if neither a password nor the "disable_ticketing" options are specified.
|
| 1635 |
# As soon as we send the password via QMP, that password is a valid ticket
|
| 1636 |
# for connection.
|
| 1637 |
spice_password_file = conf_hvp[constants.HV_KVM_SPICE_PASSWORD_FILE] |
| 1638 |
if spice_password_file:
|
| 1639 |
spice_pwd = ""
|
| 1640 |
try:
|
| 1641 |
spice_pwd = utils.ReadOneLineFile(spice_password_file, strict=True)
|
| 1642 |
except EnvironmentError, err: |
| 1643 |
raise errors.HypervisorError("Failed to open SPICE password file %s: %s" |
| 1644 |
% (spice_password_file, err)) |
| 1645 |
|
| 1646 |
qmp = QmpConnection(self._InstanceQmpMonitor(instance.name))
|
| 1647 |
qmp.connect() |
| 1648 |
arguments = {
|
| 1649 |
"protocol": "spice", |
| 1650 |
"password": spice_pwd,
|
| 1651 |
} |
| 1652 |
qmp.Execute("set_password", arguments)
|
| 1653 |
|
| 1654 |
for filename in temp_files: |
| 1655 |
utils.RemoveFile(filename) |
| 1656 |
|
| 1657 |
# If requested, set CPU affinity and resume instance execution
|
| 1658 |
if cpu_pinning:
|
| 1659 |
self._ExecuteCpuAffinity(instance.name, up_hvp[constants.HV_CPU_MASK])
|
| 1660 |
|
| 1661 |
start_memory = self._InstanceStartupMemory(instance)
|
| 1662 |
if start_memory < instance.beparams[constants.BE_MAXMEM]:
|
| 1663 |
self.BalloonInstanceMemory(instance, start_memory)
|
| 1664 |
|
| 1665 |
if start_kvm_paused:
|
| 1666 |
# To control CPU pinning, ballooning, and vnc/spice passwords
|
| 1667 |
# the VM was started in a frozen state. If freezing was not
|
| 1668 |
# explicitly requested resume the vm status.
|
| 1669 |
self._CallMonitorCommand(instance.name, self._CONT_CMD) |
| 1670 |
|
| 1671 |
def StartInstance(self, instance, block_devices, startup_paused): |
| 1672 |
"""Start an instance.
|
| 1673 |
|
| 1674 |
"""
|
| 1675 |
self._CheckDown(instance.name)
|
| 1676 |
kvmpath = instance.hvparams[constants.HV_KVM_PATH] |
| 1677 |
kvmhelp = self._GetKVMOutput(kvmpath, self._KVMOPT_HELP) |
| 1678 |
kvm_runtime = self._GenerateKVMRuntime(instance, block_devices,
|
| 1679 |
startup_paused, kvmhelp) |
| 1680 |
self._SaveKVMRuntime(instance, kvm_runtime)
|
| 1681 |
self._ExecuteKVMRuntime(instance, kvm_runtime, kvmhelp)
|
| 1682 |
|
| 1683 |
def _CallMonitorCommand(self, instance_name, command): |
| 1684 |
"""Invoke a command on the instance monitor.
|
| 1685 |
|
| 1686 |
"""
|
| 1687 |
# TODO: Replace monitor calls with QMP once KVM >= 0.14 is the minimum
|
| 1688 |
# version. The monitor protocol is designed for human consumption, whereas
|
| 1689 |
# QMP is made for programmatic usage. In the worst case QMP can also
|
| 1690 |
# execute monitor commands. As it is, all calls to socat take at least
|
| 1691 |
# 500ms and likely more: socat can't detect the end of the reply and waits
|
| 1692 |
# for 500ms of no data received before exiting (500 ms is the default for
|
| 1693 |
# the "-t" parameter).
|
| 1694 |
socat = ("echo %s | %s STDIO UNIX-CONNECT:%s" %
|
| 1695 |
(utils.ShellQuote(command), |
| 1696 |
constants.SOCAT_PATH, |
| 1697 |
utils.ShellQuote(self._InstanceMonitor(instance_name))))
|
| 1698 |
result = utils.RunCmd(socat) |
| 1699 |
if result.failed:
|
| 1700 |
msg = ("Failed to send command '%s' to instance '%s', reason '%s',"
|
| 1701 |
" output: %s" %
|
| 1702 |
(command, instance_name, result.fail_reason, result.output)) |
| 1703 |
raise errors.HypervisorError(msg)
|
| 1704 |
|
| 1705 |
return result
|
| 1706 |
|
| 1707 |
@classmethod
|
| 1708 |
def _ParseKVMVersion(cls, text): |
| 1709 |
"""Parse the KVM version from the --help output.
|
| 1710 |
|
| 1711 |
@type text: string
|
| 1712 |
@param text: output of kvm --help
|
| 1713 |
@return: (version, v_maj, v_min, v_rev)
|
| 1714 |
@raise errors.HypervisorError: when the KVM version cannot be retrieved
|
| 1715 |
|
| 1716 |
"""
|
| 1717 |
match = cls._VERSION_RE.search(text.splitlines()[0])
|
| 1718 |
if not match: |
| 1719 |
raise errors.HypervisorError("Unable to get KVM version") |
| 1720 |
|
| 1721 |
v_all = match.group(0)
|
| 1722 |
v_maj = int(match.group(1)) |
| 1723 |
v_min = int(match.group(2)) |
| 1724 |
if match.group(4): |
| 1725 |
v_rev = int(match.group(4)) |
| 1726 |
else:
|
| 1727 |
v_rev = 0
|
| 1728 |
return (v_all, v_maj, v_min, v_rev)
|
| 1729 |
|
| 1730 |
@classmethod
|
| 1731 |
def _GetKVMOutput(cls, kvm_path, option): |
| 1732 |
"""Return the output of a kvm invocation
|
| 1733 |
|
| 1734 |
@type kvm_path: string
|
| 1735 |
@param kvm_path: path to the kvm executable
|
| 1736 |
@type option: a key of _KVMOPTS_CMDS
|
| 1737 |
@param option: kvm option to fetch the output from
|
| 1738 |
@return: output a supported kvm invocation
|
| 1739 |
@raise errors.HypervisorError: when the KVM help output cannot be retrieved
|
| 1740 |
|
| 1741 |
"""
|
| 1742 |
assert option in cls._KVMOPTS_CMDS, "Invalid output option" |
| 1743 |
|
| 1744 |
optlist, can_fail = cls._KVMOPTS_CMDS[option] |
| 1745 |
|
| 1746 |
result = utils.RunCmd([kvm_path] + optlist) |
| 1747 |
if result.failed and not can_fail: |
| 1748 |
raise errors.HypervisorError("Unable to get KVM %s output" % |
| 1749 |
" ".join(optlist))
|
| 1750 |
return result.output
|
| 1751 |
|
| 1752 |
@classmethod
|
| 1753 |
def _GetKVMVersion(cls, kvm_path): |
| 1754 |
"""Return the installed KVM version.
|
| 1755 |
|
| 1756 |
@return: (version, v_maj, v_min, v_rev)
|
| 1757 |
@raise errors.HypervisorError: when the KVM version cannot be retrieved
|
| 1758 |
|
| 1759 |
"""
|
| 1760 |
return cls._ParseKVMVersion(cls._GetKVMOutput(kvm_path, cls._KVMOPT_HELP))
|
| 1761 |
|
| 1762 |
@classmethod
|
| 1763 |
def _GetDefaultMachineVersion(cls, kvm_path): |
| 1764 |
"""Return the default hardware revision (e.g. pc-1.1)
|
| 1765 |
|
| 1766 |
"""
|
| 1767 |
output = cls._GetKVMOutput(kvm_path, cls._KVMOPT_MLIST) |
| 1768 |
match = cls._DEFAULT_MACHINE_VERSION_RE.search(output) |
| 1769 |
if match:
|
| 1770 |
return match.group(1) |
| 1771 |
else:
|
| 1772 |
return "pc" |
| 1773 |
|
| 1774 |
def StopInstance(self, instance, force=False, retry=False, name=None): |
| 1775 |
"""Stop an instance.
|
| 1776 |
|
| 1777 |
"""
|
| 1778 |
if name is not None and not force: |
| 1779 |
raise errors.HypervisorError("Cannot shutdown cleanly by name only") |
| 1780 |
if name is None: |
| 1781 |
name = instance.name |
| 1782 |
acpi = instance.hvparams[constants.HV_ACPI] |
| 1783 |
else:
|
| 1784 |
acpi = False
|
| 1785 |
_, pid, alive = self._InstancePidAlive(name)
|
| 1786 |
if pid > 0 and alive: |
| 1787 |
if force or not acpi: |
| 1788 |
utils.KillProcess(pid) |
| 1789 |
else:
|
| 1790 |
self._CallMonitorCommand(name, "system_powerdown") |
| 1791 |
|
| 1792 |
def CleanupInstance(self, instance_name): |
| 1793 |
"""Cleanup after a stopped instance
|
| 1794 |
|
| 1795 |
"""
|
| 1796 |
pidfile, pid, alive = self._InstancePidAlive(instance_name)
|
| 1797 |
if pid > 0 and alive: |
| 1798 |
raise errors.HypervisorError("Cannot cleanup a live instance") |
| 1799 |
self._RemoveInstanceRuntimeFiles(pidfile, instance_name)
|
| 1800 |
|
| 1801 |
def RebootInstance(self, instance): |
| 1802 |
"""Reboot an instance.
|
| 1803 |
|
| 1804 |
"""
|
| 1805 |
# For some reason if we do a 'send-key ctrl-alt-delete' to the control
|
| 1806 |
# socket the instance will stop, but now power up again. So we'll resort
|
| 1807 |
# to shutdown and restart.
|
| 1808 |
_, _, alive = self._InstancePidAlive(instance.name)
|
| 1809 |
if not alive: |
| 1810 |
raise errors.HypervisorError("Failed to reboot instance %s:" |
| 1811 |
" not running" % instance.name)
|
| 1812 |
# StopInstance will delete the saved KVM runtime so:
|
| 1813 |
# ...first load it...
|
| 1814 |
kvm_runtime = self._LoadKVMRuntime(instance)
|
| 1815 |
# ...now we can safely call StopInstance...
|
| 1816 |
if not self.StopInstance(instance): |
| 1817 |
self.StopInstance(instance, force=True) |
| 1818 |
# ...and finally we can save it again, and execute it...
|
| 1819 |
self._SaveKVMRuntime(instance, kvm_runtime)
|
| 1820 |
kvmpath = instance.hvparams[constants.HV_KVM_PATH] |
| 1821 |
kvmhelp = self._GetKVMOutput(kvmpath, self._KVMOPT_HELP) |
| 1822 |
self._ExecuteKVMRuntime(instance, kvm_runtime, kvmhelp)
|
| 1823 |
|
| 1824 |
def MigrationInfo(self, instance): |
| 1825 |
"""Get instance information to perform a migration.
|
| 1826 |
|
| 1827 |
@type instance: L{objects.Instance}
|
| 1828 |
@param instance: instance to be migrated
|
| 1829 |
@rtype: string
|
| 1830 |
@return: content of the KVM runtime file
|
| 1831 |
|
| 1832 |
"""
|
| 1833 |
return self._ReadKVMRuntime(instance.name) |
| 1834 |
|
| 1835 |
def AcceptInstance(self, instance, info, target): |
| 1836 |
"""Prepare to accept an instance.
|
| 1837 |
|
| 1838 |
@type instance: L{objects.Instance}
|
| 1839 |
@param instance: instance to be accepted
|
| 1840 |
@type info: string
|
| 1841 |
@param info: content of the KVM runtime file on the source node
|
| 1842 |
@type target: string
|
| 1843 |
@param target: target host (usually ip), on this node
|
| 1844 |
|
| 1845 |
"""
|
| 1846 |
kvm_runtime = self._LoadKVMRuntime(instance, serialized_runtime=info)
|
| 1847 |
incoming_address = (target, instance.hvparams[constants.HV_MIGRATION_PORT]) |
| 1848 |
kvmpath = instance.hvparams[constants.HV_KVM_PATH] |
| 1849 |
kvmhelp = self._GetKVMOutput(kvmpath, self._KVMOPT_HELP) |
| 1850 |
self._ExecuteKVMRuntime(instance, kvm_runtime, kvmhelp,
|
| 1851 |
incoming=incoming_address) |
| 1852 |
|
| 1853 |
def FinalizeMigrationDst(self, instance, info, success): |
| 1854 |
"""Finalize the instance migration on the target node.
|
| 1855 |
|
| 1856 |
Stop the incoming mode KVM.
|
| 1857 |
|
| 1858 |
@type instance: L{objects.Instance}
|
| 1859 |
@param instance: instance whose migration is being finalized
|
| 1860 |
|
| 1861 |
"""
|
| 1862 |
if success:
|
| 1863 |
kvm_runtime = self._LoadKVMRuntime(instance, serialized_runtime=info)
|
| 1864 |
kvm_nics = kvm_runtime[1]
|
| 1865 |
|
| 1866 |
for nic_seq, nic in enumerate(kvm_nics): |
| 1867 |
if nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
|
| 1868 |
# Bridged interfaces have already been configured
|
| 1869 |
continue
|
| 1870 |
try:
|
| 1871 |
tap = utils.ReadFile(self._InstanceNICFile(instance.name, nic_seq))
|
| 1872 |
except EnvironmentError, err: |
| 1873 |
logging.warning("Failed to find host interface for %s NIC #%d: %s",
|
| 1874 |
instance.name, nic_seq, str(err))
|
| 1875 |
continue
|
| 1876 |
try:
|
| 1877 |
self._ConfigureNIC(instance, nic_seq, nic, tap)
|
| 1878 |
except errors.HypervisorError, err:
|
| 1879 |
logging.warning(str(err))
|
| 1880 |
|
| 1881 |
self._WriteKVMRuntime(instance.name, info)
|
| 1882 |
else:
|
| 1883 |
self.StopInstance(instance, force=True) |
| 1884 |
|
| 1885 |
def MigrateInstance(self, instance, target, live): |
| 1886 |
"""Migrate an instance to a target node.
|
| 1887 |
|
| 1888 |
The migration will not be attempted if the instance is not
|
| 1889 |
currently running.
|
| 1890 |
|
| 1891 |
@type instance: L{objects.Instance}
|
| 1892 |
@param instance: the instance to be migrated
|
| 1893 |
@type target: string
|
| 1894 |
@param target: ip address of the target node
|
| 1895 |
@type live: boolean
|
| 1896 |
@param live: perform a live migration
|
| 1897 |
|
| 1898 |
"""
|
| 1899 |
instance_name = instance.name |
| 1900 |
port = instance.hvparams[constants.HV_MIGRATION_PORT] |
| 1901 |
_, _, alive = self._InstancePidAlive(instance_name)
|
| 1902 |
if not alive: |
| 1903 |
raise errors.HypervisorError("Instance not running, cannot migrate") |
| 1904 |
|
| 1905 |
if not live: |
| 1906 |
self._CallMonitorCommand(instance_name, "stop") |
| 1907 |
|
| 1908 |
migrate_command = ("migrate_set_speed %dm" %
|
| 1909 |
instance.hvparams[constants.HV_MIGRATION_BANDWIDTH]) |
| 1910 |
self._CallMonitorCommand(instance_name, migrate_command)
|
| 1911 |
|
| 1912 |
migrate_command = ("migrate_set_downtime %dms" %
|
| 1913 |
instance.hvparams[constants.HV_MIGRATION_DOWNTIME]) |
| 1914 |
self._CallMonitorCommand(instance_name, migrate_command)
|
| 1915 |
|
| 1916 |
migrate_command = "migrate -d tcp:%s:%s" % (target, port)
|
| 1917 |
self._CallMonitorCommand(instance_name, migrate_command)
|
| 1918 |
|
| 1919 |
def FinalizeMigrationSource(self, instance, success, live): |
| 1920 |
"""Finalize the instance migration on the source node.
|
| 1921 |
|
| 1922 |
@type instance: L{objects.Instance}
|
| 1923 |
@param instance: the instance that was migrated
|
| 1924 |
@type success: bool
|
| 1925 |
@param success: whether the migration succeeded or not
|
| 1926 |
@type live: bool
|
| 1927 |
@param live: whether the user requested a live migration or not
|
| 1928 |
|
| 1929 |
"""
|
| 1930 |
if success:
|
| 1931 |
pidfile, pid, _ = self._InstancePidAlive(instance.name)
|
| 1932 |
utils.KillProcess(pid) |
| 1933 |
self._RemoveInstanceRuntimeFiles(pidfile, instance.name)
|
| 1934 |
elif live:
|
| 1935 |
self._CallMonitorCommand(instance.name, self._CONT_CMD) |
| 1936 |
|
| 1937 |
def GetMigrationStatus(self, instance): |
| 1938 |
"""Get the migration status
|
| 1939 |
|
| 1940 |
@type instance: L{objects.Instance}
|
| 1941 |
@param instance: the instance that is being migrated
|
| 1942 |
@rtype: L{objects.MigrationStatus}
|
| 1943 |
@return: the status of the current migration (one of
|
| 1944 |
L{constants.HV_MIGRATION_VALID_STATUSES}), plus any additional
|
| 1945 |
progress info that can be retrieved from the hypervisor
|
| 1946 |
|
| 1947 |
"""
|
| 1948 |
info_command = "info migrate"
|
| 1949 |
for _ in range(self._MIGRATION_INFO_MAX_BAD_ANSWERS): |
| 1950 |
result = self._CallMonitorCommand(instance.name, info_command)
|
| 1951 |
match = self._MIGRATION_STATUS_RE.search(result.stdout)
|
| 1952 |
if not match: |
| 1953 |
if not result.stdout: |
| 1954 |
logging.info("KVM: empty 'info migrate' result")
|
| 1955 |
else:
|
| 1956 |
logging.warning("KVM: unknown 'info migrate' result: %s",
|
| 1957 |
result.stdout) |
| 1958 |
else:
|
| 1959 |
status = match.group(1)
|
| 1960 |
if status in constants.HV_KVM_MIGRATION_VALID_STATUSES: |
| 1961 |
migration_status = objects.MigrationStatus(status=status) |
| 1962 |
match = self._MIGRATION_PROGRESS_RE.search(result.stdout)
|
| 1963 |
if match:
|
| 1964 |
migration_status.transferred_ram = match.group("transferred")
|
| 1965 |
migration_status.total_ram = match.group("total")
|
| 1966 |
|
| 1967 |
return migration_status
|
| 1968 |
|
| 1969 |
logging.warning("KVM: unknown migration status '%s'", status)
|
| 1970 |
|
| 1971 |
time.sleep(self._MIGRATION_INFO_RETRY_DELAY)
|
| 1972 |
|
| 1973 |
return objects.MigrationStatus(status=constants.HV_MIGRATION_FAILED)
|
| 1974 |
|
| 1975 |
def BalloonInstanceMemory(self, instance, mem): |
| 1976 |
"""Balloon an instance memory to a certain value.
|
| 1977 |
|
| 1978 |
@type instance: L{objects.Instance}
|
| 1979 |
@param instance: instance to be accepted
|
| 1980 |
@type mem: int
|
| 1981 |
@param mem: actual memory size to use for instance runtime
|
| 1982 |
|
| 1983 |
"""
|
| 1984 |
self._CallMonitorCommand(instance.name, "balloon %d" % mem) |
| 1985 |
|
| 1986 |
def GetNodeInfo(self): |
| 1987 |
"""Return information about the node.
|
| 1988 |
|
| 1989 |
@return: a dict with the following keys (values in MiB):
|
| 1990 |
- memory_total: the total memory size on the node
|
| 1991 |
- memory_free: the available memory on the node for instances
|
| 1992 |
- memory_dom0: the memory used by the node itself, if available
|
| 1993 |
- hv_version: the hypervisor version in the form (major, minor,
|
| 1994 |
revision)
|
| 1995 |
|
| 1996 |
"""
|
| 1997 |
result = self.GetLinuxNodeInfo()
|
| 1998 |
# FIXME: this is the global kvm version, but the actual version can be
|
| 1999 |
# customized as an hv parameter. we should use the nodegroup's default kvm
|
| 2000 |
# path parameter here.
|
| 2001 |
_, v_major, v_min, v_rev = self._GetKVMVersion(constants.KVM_PATH)
|
| 2002 |
result[constants.HV_NODEINFO_KEY_VERSION] = (v_major, v_min, v_rev) |
| 2003 |
return result
|
| 2004 |
|
| 2005 |
@classmethod
|
| 2006 |
def GetInstanceConsole(cls, instance, hvparams, beparams): |
| 2007 |
"""Return a command for connecting to the console of an instance.
|
| 2008 |
|
| 2009 |
"""
|
| 2010 |
if hvparams[constants.HV_SERIAL_CONSOLE]:
|
| 2011 |
cmd = [pathutils.KVM_CONSOLE_WRAPPER, |
| 2012 |
constants.SOCAT_PATH, utils.ShellQuote(instance.name), |
| 2013 |
utils.ShellQuote(cls._InstanceMonitor(instance.name)), |
| 2014 |
"STDIO,%s" % cls._SocatUnixConsoleParams(),
|
| 2015 |
"UNIX-CONNECT:%s" % cls._InstanceSerial(instance.name)]
|
| 2016 |
return objects.InstanceConsole(instance=instance.name,
|
| 2017 |
kind=constants.CONS_SSH, |
| 2018 |
host=instance.primary_node, |
| 2019 |
user=constants.SSH_CONSOLE_USER, |
| 2020 |
command=cmd) |
| 2021 |
|
| 2022 |
vnc_bind_address = hvparams[constants.HV_VNC_BIND_ADDRESS] |
| 2023 |
if vnc_bind_address and instance.network_port > constants.VNC_BASE_PORT: |
| 2024 |
display = instance.network_port - constants.VNC_BASE_PORT |
| 2025 |
return objects.InstanceConsole(instance=instance.name,
|
| 2026 |
kind=constants.CONS_VNC, |
| 2027 |
host=vnc_bind_address, |
| 2028 |
port=instance.network_port, |
| 2029 |
display=display) |
| 2030 |
|
| 2031 |
spice_bind = hvparams[constants.HV_KVM_SPICE_BIND] |
| 2032 |
if spice_bind:
|
| 2033 |
return objects.InstanceConsole(instance=instance.name,
|
| 2034 |
kind=constants.CONS_SPICE, |
| 2035 |
host=spice_bind, |
| 2036 |
port=instance.network_port) |
| 2037 |
|
| 2038 |
return objects.InstanceConsole(instance=instance.name,
|
| 2039 |
kind=constants.CONS_MESSAGE, |
| 2040 |
message=("No serial shell for instance %s" %
|
| 2041 |
instance.name)) |
| 2042 |
|
| 2043 |
def Verify(self): |
| 2044 |
"""Verify the hypervisor.
|
| 2045 |
|
| 2046 |
Check that the required binaries exist.
|
| 2047 |
|
| 2048 |
@return: Problem description if something is wrong, C{None} otherwise
|
| 2049 |
|
| 2050 |
"""
|
| 2051 |
msgs = [] |
| 2052 |
# FIXME: this is the global kvm binary, but the actual path can be
|
| 2053 |
# customized as an hv parameter; we should use the nodegroup's
|
| 2054 |
# default kvm path parameter here.
|
| 2055 |
if not os.path.exists(constants.KVM_PATH): |
| 2056 |
msgs.append("The KVM binary ('%s') does not exist" % constants.KVM_PATH)
|
| 2057 |
if not os.path.exists(constants.SOCAT_PATH): |
| 2058 |
msgs.append("The socat binary ('%s') does not exist" %
|
| 2059 |
constants.SOCAT_PATH) |
| 2060 |
|
| 2061 |
return self._FormatVerifyResults(msgs) |
| 2062 |
|
| 2063 |
@classmethod
|
| 2064 |
def CheckParameterSyntax(cls, hvparams): |
| 2065 |
"""Check the given parameters for validity.
|
| 2066 |
|
| 2067 |
@type hvparams: dict
|
| 2068 |
@param hvparams: dictionary with parameter names/value
|
| 2069 |
@raise errors.HypervisorError: when a parameter is not valid
|
| 2070 |
|
| 2071 |
"""
|
| 2072 |
super(KVMHypervisor, cls).CheckParameterSyntax(hvparams)
|
| 2073 |
|
| 2074 |
kernel_path = hvparams[constants.HV_KERNEL_PATH] |
| 2075 |
if kernel_path:
|
| 2076 |
if not hvparams[constants.HV_ROOT_PATH]: |
| 2077 |
raise errors.HypervisorError("Need a root partition for the instance," |
| 2078 |
" if a kernel is defined")
|
| 2079 |
|
| 2080 |
if (hvparams[constants.HV_VNC_X509_VERIFY] and |
| 2081 |
not hvparams[constants.HV_VNC_X509]):
|
| 2082 |
raise errors.HypervisorError("%s must be defined, if %s is" % |
| 2083 |
(constants.HV_VNC_X509, |
| 2084 |
constants.HV_VNC_X509_VERIFY)) |
| 2085 |
|
| 2086 |
if hvparams[constants.HV_SERIAL_CONSOLE]:
|
| 2087 |
serial_speed = hvparams[constants.HV_SERIAL_SPEED] |
| 2088 |
valid_speeds = constants.VALID_SERIAL_SPEEDS |
| 2089 |
if not serial_speed or serial_speed not in valid_speeds: |
| 2090 |
raise errors.HypervisorError("Invalid serial console speed, must be" |
| 2091 |
" one of: %s" %
|
| 2092 |
utils.CommaJoin(valid_speeds)) |
| 2093 |
|
| 2094 |
boot_order = hvparams[constants.HV_BOOT_ORDER] |
| 2095 |
if (boot_order == constants.HT_BO_CDROM and |
| 2096 |
not hvparams[constants.HV_CDROM_IMAGE_PATH]):
|
| 2097 |
raise errors.HypervisorError("Cannot boot from cdrom without an" |
| 2098 |
" ISO path")
|
| 2099 |
|
| 2100 |
security_model = hvparams[constants.HV_SECURITY_MODEL] |
| 2101 |
if security_model == constants.HT_SM_USER:
|
| 2102 |
if not hvparams[constants.HV_SECURITY_DOMAIN]: |
| 2103 |
raise errors.HypervisorError("A security domain (user to run kvm as)" |
| 2104 |
" must be specified")
|
| 2105 |
elif (security_model == constants.HT_SM_NONE or |
| 2106 |
security_model == constants.HT_SM_POOL): |
| 2107 |
if hvparams[constants.HV_SECURITY_DOMAIN]:
|
| 2108 |
raise errors.HypervisorError("Cannot have a security domain when the" |
| 2109 |
" security model is 'none' or 'pool'")
|
| 2110 |
|
| 2111 |
spice_bind = hvparams[constants.HV_KVM_SPICE_BIND] |
| 2112 |
spice_ip_version = hvparams[constants.HV_KVM_SPICE_IP_VERSION] |
| 2113 |
if spice_bind:
|
| 2114 |
if spice_ip_version != constants.IFACE_NO_IP_VERSION_SPECIFIED:
|
| 2115 |
# if an IP version is specified, the spice_bind parameter must be an
|
| 2116 |
# IP of that family
|
| 2117 |
if (netutils.IP4Address.IsValid(spice_bind) and |
| 2118 |
spice_ip_version != constants.IP4_VERSION): |
| 2119 |
raise errors.HypervisorError("SPICE: Got an IPv4 address (%s), but" |
| 2120 |
" the specified IP version is %s" %
|
| 2121 |
(spice_bind, spice_ip_version)) |
| 2122 |
|
| 2123 |
if (netutils.IP6Address.IsValid(spice_bind) and |
| 2124 |
spice_ip_version != constants.IP6_VERSION): |
| 2125 |
raise errors.HypervisorError("SPICE: Got an IPv6 address (%s), but" |
| 2126 |
" the specified IP version is %s" %
|
| 2127 |
(spice_bind, spice_ip_version)) |
| 2128 |
else:
|
| 2129 |
# All the other SPICE parameters depend on spice_bind being set. Raise an
|
| 2130 |
# error if any of them is set without it.
|
| 2131 |
for param in _SPICE_ADDITIONAL_PARAMS: |
| 2132 |
if hvparams[param]:
|
| 2133 |
raise errors.HypervisorError("SPICE: %s requires %s to be set" % |
| 2134 |
(param, constants.HV_KVM_SPICE_BIND)) |
| 2135 |
|
| 2136 |
@classmethod
|
| 2137 |
def ValidateParameters(cls, hvparams): |
| 2138 |
"""Check the given parameters for validity.
|
| 2139 |
|
| 2140 |
@type hvparams: dict
|
| 2141 |
@param hvparams: dictionary with parameter names/value
|
| 2142 |
@raise errors.HypervisorError: when a parameter is not valid
|
| 2143 |
|
| 2144 |
"""
|
| 2145 |
super(KVMHypervisor, cls).ValidateParameters(hvparams)
|
| 2146 |
|
| 2147 |
kvm_path = hvparams[constants.HV_KVM_PATH] |
| 2148 |
|
| 2149 |
security_model = hvparams[constants.HV_SECURITY_MODEL] |
| 2150 |
if security_model == constants.HT_SM_USER:
|
| 2151 |
username = hvparams[constants.HV_SECURITY_DOMAIN] |
| 2152 |
try:
|
| 2153 |
pwd.getpwnam(username) |
| 2154 |
except KeyError: |
| 2155 |
raise errors.HypervisorError("Unknown security domain user %s" |
| 2156 |
% username) |
| 2157 |
|
| 2158 |
spice_bind = hvparams[constants.HV_KVM_SPICE_BIND] |
| 2159 |
if spice_bind:
|
| 2160 |
# only one of VNC and SPICE can be used currently.
|
| 2161 |
if hvparams[constants.HV_VNC_BIND_ADDRESS]:
|
| 2162 |
raise errors.HypervisorError("Both SPICE and VNC are configured, but" |
| 2163 |
" only one of them can be used at a"
|
| 2164 |
" given time")
|
| 2165 |
|
| 2166 |
# check that KVM supports SPICE
|
| 2167 |
kvmhelp = cls._GetKVMOutput(kvm_path, cls._KVMOPT_HELP) |
| 2168 |
if not cls._SPICE_RE.search(kvmhelp): |
| 2169 |
raise errors.HypervisorError("SPICE is configured, but it is not" |
| 2170 |
" supported according to 'kvm --help'")
|
| 2171 |
|
| 2172 |
# if spice_bind is not an IP address, it must be a valid interface
|
| 2173 |
bound_to_addr = (netutils.IP4Address.IsValid(spice_bind) or
|
| 2174 |
netutils.IP6Address.IsValid(spice_bind)) |
| 2175 |
if not bound_to_addr and not netutils.IsValidInterface(spice_bind): |
| 2176 |
raise errors.HypervisorError("SPICE: The %s parameter must be either" |
| 2177 |
" a valid IP address or interface name" %
|
| 2178 |
constants.HV_KVM_SPICE_BIND) |
| 2179 |
|
| 2180 |
machine_version = hvparams[constants.HV_KVM_MACHINE_VERSION] |
| 2181 |
if machine_version:
|
| 2182 |
output = cls._GetKVMOutput(kvm_path, cls._KVMOPT_MLIST) |
| 2183 |
if not cls._CHECK_MACHINE_VERSION_RE(machine_version).search(output): |
| 2184 |
raise errors.HypervisorError("Unsupported machine version: %s" % |
| 2185 |
machine_version) |
| 2186 |
|
| 2187 |
@classmethod
|
| 2188 |
def PowercycleNode(cls): |
| 2189 |
"""KVM powercycle, just a wrapper over Linux powercycle.
|
| 2190 |
|
| 2191 |
"""
|
| 2192 |
cls.LinuxPowercycle() |