root / lib / hypervisor / hv_kvm.py @ f5a4b9ce
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#
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#
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# Copyright (C) 2008, 2009, 2010, 2011 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 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.hypervisor import hv_base |
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from ganeti import netutils |
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from ganeti.utils import wrapper as utils_wrapper |
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_KVM_NETWORK_SCRIPT = constants.SYSCONFDIR + "/ganeti/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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def _ProbeTapVnetHdr(fd): |
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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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req = struct.pack("I", 0) |
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try:
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res = fcntl.ioctl(fd, TUNGETFEATURES, req) |
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except EnvironmentError: |
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logging.warning("TUNGETFEATURES ioctl() not implemented")
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return False |
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tunflags = struct.unpack("I", res)[0] |
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if tunflags & IFF_VNET_HDR:
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return True |
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else:
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logging.warning("Host does not support IFF_VNET_HDR, not enabling")
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return False |
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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: |
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raise errors.HypervisorError("Failed to allocate a new TAP device") |
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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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if field_name in self.data: |
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return self.data[field_name] |
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return 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
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# line, hence the need for indent=False.
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return serializer.DumpJson(self.data, indent=False) |
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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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_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_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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self.sock.connect(self.monitor_filename) |
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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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CAN_MIGRATE = True
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_ROOT_DIR = constants.RUN_GANETI_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] |
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PARAMETERS = {
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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_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"
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" pathname", None, None), |
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constants.HV_VNC_TLS: hv_base.NO_CHECK, |
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constants.HV_VNC_X509: hv_base.OPT_DIR_CHECK, |
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constants.HV_VNC_X509_VERIFY: hv_base.NO_CHECK, |
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constants.HV_VNC_PASSWORD_FILE: hv_base.OPT_FILE_CHECK, |
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constants.HV_KVM_SPICE_BIND: hv_base.NO_CHECK, # will be checked later
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constants.HV_KVM_SPICE_IP_VERSION: |
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(False, lambda x: (x == constants.IFACE_NO_IP_VERSION_SPECIFIED or |
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x in constants.VALID_IP_VERSIONS),
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"the SPICE IP version should be 4 or 6",
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None, None), |
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constants.HV_KVM_SPICE_PASSWORD_FILE: hv_base.OPT_FILE_CHECK, |
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constants.HV_KVM_SPICE_LOSSLESS_IMG_COMPR: |
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hv_base.ParamInSet(False,
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constants.HT_KVM_SPICE_VALID_LOSSLESS_IMG_COMPR_OPTIONS), |
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constants.HV_KVM_SPICE_JPEG_IMG_COMPR: |
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hv_base.ParamInSet(False,
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constants.HT_KVM_SPICE_VALID_LOSSY_IMG_COMPR_OPTIONS), |
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constants.HV_KVM_SPICE_ZLIB_GLZ_IMG_COMPR: |
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hv_base.ParamInSet(False,
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constants.HT_KVM_SPICE_VALID_LOSSY_IMG_COMPR_OPTIONS), |
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constants.HV_KVM_SPICE_STREAMING_VIDEO_DETECTION: |
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hv_base.ParamInSet(False,
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constants.HT_KVM_SPICE_VALID_VIDEO_STREAM_DETECTION_OPTIONS), |
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constants.HV_KVM_SPICE_AUDIO_COMPR: hv_base.NO_CHECK, |
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constants.HV_KVM_SPICE_USE_TLS: hv_base.NO_CHECK, |
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constants.HV_KVM_SPICE_TLS_CIPHERS: hv_base.NO_CHECK, |
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constants.HV_KVM_SPICE_USE_VDAGENT: hv_base.NO_CHECK, |
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constants.HV_KVM_FLOPPY_IMAGE_PATH: hv_base.OPT_FILE_CHECK, |
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constants.HV_CDROM_IMAGE_PATH: hv_base.OPT_FILE_CHECK, |
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constants.HV_KVM_CDROM2_IMAGE_PATH: hv_base.OPT_FILE_CHECK, |
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constants.HV_BOOT_ORDER: |
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hv_base.ParamInSet(True, constants.HT_KVM_VALID_BO_TYPES),
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constants.HV_NIC_TYPE: |
| 449 |
hv_base.ParamInSet(True, constants.HT_KVM_VALID_NIC_TYPES),
|
| 450 |
constants.HV_DISK_TYPE: |
| 451 |
hv_base.ParamInSet(True, constants.HT_KVM_VALID_DISK_TYPES),
|
| 452 |
constants.HV_KVM_CDROM_DISK_TYPE: |
| 453 |
hv_base.ParamInSet(False, constants.HT_KVM_VALID_DISK_TYPES),
|
| 454 |
constants.HV_USB_MOUSE: |
| 455 |
hv_base.ParamInSet(False, constants.HT_KVM_VALID_MOUSE_TYPES),
|
| 456 |
constants.HV_KEYMAP: hv_base.NO_CHECK, |
| 457 |
constants.HV_MIGRATION_PORT: hv_base.REQ_NET_PORT_CHECK, |
| 458 |
constants.HV_MIGRATION_BANDWIDTH: hv_base.NO_CHECK, |
| 459 |
constants.HV_MIGRATION_DOWNTIME: hv_base.NO_CHECK, |
| 460 |
constants.HV_MIGRATION_MODE: hv_base.MIGRATION_MODE_CHECK, |
| 461 |
constants.HV_USE_LOCALTIME: hv_base.NO_CHECK, |
| 462 |
constants.HV_DISK_CACHE: |
| 463 |
hv_base.ParamInSet(True, constants.HT_VALID_CACHE_TYPES),
|
| 464 |
constants.HV_SECURITY_MODEL: |
| 465 |
hv_base.ParamInSet(True, constants.HT_KVM_VALID_SM_TYPES),
|
| 466 |
constants.HV_SECURITY_DOMAIN: hv_base.NO_CHECK, |
| 467 |
constants.HV_KVM_FLAG: |
| 468 |
hv_base.ParamInSet(False, constants.HT_KVM_FLAG_VALUES),
|
| 469 |
constants.HV_VHOST_NET: hv_base.NO_CHECK, |
| 470 |
constants.HV_KVM_USE_CHROOT: hv_base.NO_CHECK, |
| 471 |
constants.HV_MEM_PATH: hv_base.OPT_DIR_CHECK, |
| 472 |
constants.HV_REBOOT_BEHAVIOR: |
| 473 |
hv_base.ParamInSet(True, constants.REBOOT_BEHAVIORS),
|
| 474 |
constants.HV_CPU_MASK: hv_base.OPT_MULTI_CPU_MASK_CHECK, |
| 475 |
} |
| 476 |
|
| 477 |
_MIGRATION_STATUS_RE = re.compile("Migration\s+status:\s+(\w+)",
|
| 478 |
re.M | re.I) |
| 479 |
_MIGRATION_PROGRESS_RE = re.compile( |
| 480 |
"\s*transferred\s+ram:\s+(?P<transferred>\d+)\s+kbytes\s*\n"
|
| 481 |
"\s*remaining\s+ram:\s+(?P<remaining>\d+)\s+kbytes\s*\n"
|
| 482 |
"\s*total\s+ram:\s+(?P<total>\d+)\s+kbytes\s*\n", re.I)
|
| 483 |
|
| 484 |
_MIGRATION_INFO_MAX_BAD_ANSWERS = 5
|
| 485 |
_MIGRATION_INFO_RETRY_DELAY = 2
|
| 486 |
|
| 487 |
_VERSION_RE = re.compile(r"\b(\d+)\.(\d+)\.(\d+)\b")
|
| 488 |
|
| 489 |
_CPU_INFO_RE = re.compile(r"cpu\s+\#(\d+).*thread_id\s*=\s*(\d+)", re.I)
|
| 490 |
_CPU_INFO_CMD = "info cpus"
|
| 491 |
_CONT_CMD = "cont"
|
| 492 |
|
| 493 |
ANCILLARY_FILES = [ |
| 494 |
_KVM_NETWORK_SCRIPT, |
| 495 |
] |
| 496 |
ANCILLARY_FILES_OPT = [ |
| 497 |
_KVM_NETWORK_SCRIPT, |
| 498 |
] |
| 499 |
|
| 500 |
def __init__(self): |
| 501 |
hv_base.BaseHypervisor.__init__(self)
|
| 502 |
# Let's make sure the directories we need exist, even if the RUN_DIR lives
|
| 503 |
# in a tmpfs filesystem or has been otherwise wiped out.
|
| 504 |
dirs = [(dname, constants.RUN_DIRS_MODE) for dname in self._DIRS] |
| 505 |
utils.EnsureDirs(dirs) |
| 506 |
|
| 507 |
@classmethod
|
| 508 |
def _InstancePidFile(cls, instance_name): |
| 509 |
"""Returns the instance pidfile.
|
| 510 |
|
| 511 |
"""
|
| 512 |
return utils.PathJoin(cls._PIDS_DIR, instance_name)
|
| 513 |
|
| 514 |
@classmethod
|
| 515 |
def _InstanceUidFile(cls, instance_name): |
| 516 |
"""Returns the instance uidfile.
|
| 517 |
|
| 518 |
"""
|
| 519 |
return utils.PathJoin(cls._UIDS_DIR, instance_name)
|
| 520 |
|
| 521 |
@classmethod
|
| 522 |
def _InstancePidInfo(cls, pid): |
| 523 |
"""Check pid file for instance information.
|
| 524 |
|
| 525 |
Check that a pid file is associated with an instance, and retrieve
|
| 526 |
information from its command line.
|
| 527 |
|
| 528 |
@type pid: string or int
|
| 529 |
@param pid: process id of the instance to check
|
| 530 |
@rtype: tuple
|
| 531 |
@return: (instance_name, memory, vcpus)
|
| 532 |
@raise errors.HypervisorError: when an instance cannot be found
|
| 533 |
|
| 534 |
"""
|
| 535 |
alive = utils.IsProcessAlive(pid) |
| 536 |
if not alive: |
| 537 |
raise errors.HypervisorError("Cannot get info for pid %s" % pid) |
| 538 |
|
| 539 |
cmdline_file = utils.PathJoin("/proc", str(pid), "cmdline") |
| 540 |
try:
|
| 541 |
cmdline = utils.ReadFile(cmdline_file) |
| 542 |
except EnvironmentError, err: |
| 543 |
raise errors.HypervisorError("Can't open cmdline file for pid %s: %s" % |
| 544 |
(pid, err)) |
| 545 |
|
| 546 |
instance = None
|
| 547 |
memory = 0
|
| 548 |
vcpus = 0
|
| 549 |
|
| 550 |
arg_list = cmdline.split("\x00")
|
| 551 |
while arg_list:
|
| 552 |
arg = arg_list.pop(0)
|
| 553 |
if arg == "-name": |
| 554 |
instance = arg_list.pop(0)
|
| 555 |
elif arg == "-m": |
| 556 |
memory = int(arg_list.pop(0)) |
| 557 |
elif arg == "-smp": |
| 558 |
vcpus = int(arg_list.pop(0)) |
| 559 |
|
| 560 |
if instance is None: |
| 561 |
raise errors.HypervisorError("Pid %s doesn't contain a ganeti kvm" |
| 562 |
" instance" % pid)
|
| 563 |
|
| 564 |
return (instance, memory, vcpus)
|
| 565 |
|
| 566 |
def _InstancePidAlive(self, instance_name): |
| 567 |
"""Returns the instance pidfile, pid, and liveness.
|
| 568 |
|
| 569 |
@type instance_name: string
|
| 570 |
@param instance_name: instance name
|
| 571 |
@rtype: tuple
|
| 572 |
@return: (pid file name, pid, liveness)
|
| 573 |
|
| 574 |
"""
|
| 575 |
pidfile = self._InstancePidFile(instance_name)
|
| 576 |
pid = utils.ReadPidFile(pidfile) |
| 577 |
|
| 578 |
alive = False
|
| 579 |
try:
|
| 580 |
cmd_instance = self._InstancePidInfo(pid)[0] |
| 581 |
alive = (cmd_instance == instance_name) |
| 582 |
except errors.HypervisorError:
|
| 583 |
pass
|
| 584 |
|
| 585 |
return (pidfile, pid, alive)
|
| 586 |
|
| 587 |
def _CheckDown(self, instance_name): |
| 588 |
"""Raises an error unless the given instance is down.
|
| 589 |
|
| 590 |
"""
|
| 591 |
alive = self._InstancePidAlive(instance_name)[2] |
| 592 |
if alive:
|
| 593 |
raise errors.HypervisorError("Failed to start instance %s: %s" % |
| 594 |
(instance_name, "already running"))
|
| 595 |
|
| 596 |
@classmethod
|
| 597 |
def _InstanceMonitor(cls, instance_name): |
| 598 |
"""Returns the instance monitor socket name
|
| 599 |
|
| 600 |
"""
|
| 601 |
return utils.PathJoin(cls._CTRL_DIR, "%s.monitor" % instance_name) |
| 602 |
|
| 603 |
@classmethod
|
| 604 |
def _InstanceSerial(cls, instance_name): |
| 605 |
"""Returns the instance serial socket name
|
| 606 |
|
| 607 |
"""
|
| 608 |
return utils.PathJoin(cls._CTRL_DIR, "%s.serial" % instance_name) |
| 609 |
|
| 610 |
@classmethod
|
| 611 |
def _InstanceQmpMonitor(cls, instance_name): |
| 612 |
"""Returns the instance serial QMP socket name
|
| 613 |
|
| 614 |
"""
|
| 615 |
return utils.PathJoin(cls._CTRL_DIR, "%s.qmp" % instance_name) |
| 616 |
|
| 617 |
@staticmethod
|
| 618 |
def _SocatUnixConsoleParams(): |
| 619 |
"""Returns the correct parameters for socat
|
| 620 |
|
| 621 |
If we have a new-enough socat we can use raw mode with an escape character.
|
| 622 |
|
| 623 |
"""
|
| 624 |
if constants.SOCAT_USE_ESCAPE:
|
| 625 |
return "raw,echo=0,escape=%s" % constants.SOCAT_ESCAPE_CODE |
| 626 |
else:
|
| 627 |
return "echo=0,icanon=0" |
| 628 |
|
| 629 |
@classmethod
|
| 630 |
def _InstanceKVMRuntime(cls, instance_name): |
| 631 |
"""Returns the instance KVM runtime filename
|
| 632 |
|
| 633 |
"""
|
| 634 |
return utils.PathJoin(cls._CONF_DIR, "%s.runtime" % instance_name) |
| 635 |
|
| 636 |
@classmethod
|
| 637 |
def _InstanceChrootDir(cls, instance_name): |
| 638 |
"""Returns the name of the KVM chroot dir of the instance
|
| 639 |
|
| 640 |
"""
|
| 641 |
return utils.PathJoin(cls._CHROOT_DIR, instance_name)
|
| 642 |
|
| 643 |
@classmethod
|
| 644 |
def _InstanceNICDir(cls, instance_name): |
| 645 |
"""Returns the name of the directory holding the tap device files for a
|
| 646 |
given instance.
|
| 647 |
|
| 648 |
"""
|
| 649 |
return utils.PathJoin(cls._NICS_DIR, instance_name)
|
| 650 |
|
| 651 |
@classmethod
|
| 652 |
def _InstanceNICFile(cls, instance_name, seq): |
| 653 |
"""Returns the name of the file containing the tap device for a given NIC
|
| 654 |
|
| 655 |
"""
|
| 656 |
return utils.PathJoin(cls._InstanceNICDir(instance_name), str(seq)) |
| 657 |
|
| 658 |
@classmethod
|
| 659 |
def _InstanceKeymapFile(cls, instance_name): |
| 660 |
"""Returns the name of the file containing the keymap for a given instance
|
| 661 |
|
| 662 |
"""
|
| 663 |
return utils.PathJoin(cls._KEYMAP_DIR, instance_name)
|
| 664 |
|
| 665 |
@classmethod
|
| 666 |
def _TryReadUidFile(cls, uid_file): |
| 667 |
"""Try to read a uid file
|
| 668 |
|
| 669 |
"""
|
| 670 |
if os.path.exists(uid_file):
|
| 671 |
try:
|
| 672 |
uid = int(utils.ReadOneLineFile(uid_file))
|
| 673 |
return uid
|
| 674 |
except EnvironmentError: |
| 675 |
logging.warning("Can't read uid file", exc_info=True) |
| 676 |
except (TypeError, ValueError): |
| 677 |
logging.warning("Can't parse uid file contents", exc_info=True) |
| 678 |
return None |
| 679 |
|
| 680 |
@classmethod
|
| 681 |
def _RemoveInstanceRuntimeFiles(cls, pidfile, instance_name): |
| 682 |
"""Removes an instance's rutime sockets/files/dirs.
|
| 683 |
|
| 684 |
"""
|
| 685 |
utils.RemoveFile(pidfile) |
| 686 |
utils.RemoveFile(cls._InstanceMonitor(instance_name)) |
| 687 |
utils.RemoveFile(cls._InstanceSerial(instance_name)) |
| 688 |
utils.RemoveFile(cls._InstanceQmpMonitor(instance_name)) |
| 689 |
utils.RemoveFile(cls._InstanceKVMRuntime(instance_name)) |
| 690 |
utils.RemoveFile(cls._InstanceKeymapFile(instance_name)) |
| 691 |
uid_file = cls._InstanceUidFile(instance_name) |
| 692 |
uid = cls._TryReadUidFile(uid_file) |
| 693 |
utils.RemoveFile(uid_file) |
| 694 |
if uid is not None: |
| 695 |
uidpool.ReleaseUid(uid) |
| 696 |
try:
|
| 697 |
shutil.rmtree(cls._InstanceNICDir(instance_name)) |
| 698 |
except OSError, err: |
| 699 |
if err.errno != errno.ENOENT:
|
| 700 |
raise
|
| 701 |
try:
|
| 702 |
chroot_dir = cls._InstanceChrootDir(instance_name) |
| 703 |
utils.RemoveDir(chroot_dir) |
| 704 |
except OSError, err: |
| 705 |
if err.errno == errno.ENOTEMPTY:
|
| 706 |
# The chroot directory is expected to be empty, but it isn't.
|
| 707 |
new_chroot_dir = tempfile.mkdtemp(dir=cls._CHROOT_QUARANTINE_DIR, |
| 708 |
prefix="%s-%s-" %
|
| 709 |
(instance_name, |
| 710 |
utils.TimestampForFilename())) |
| 711 |
logging.warning("The chroot directory of instance %s can not be"
|
| 712 |
" removed as it is not empty. Moving it to the"
|
| 713 |
" quarantine instead. Please investigate the"
|
| 714 |
" contents (%s) and clean up manually",
|
| 715 |
instance_name, new_chroot_dir) |
| 716 |
utils.RenameFile(chroot_dir, new_chroot_dir) |
| 717 |
else:
|
| 718 |
raise
|
| 719 |
|
| 720 |
@staticmethod
|
| 721 |
def _ConfigureNIC(instance, seq, nic, tap): |
| 722 |
"""Run the network configuration script for a specified NIC
|
| 723 |
|
| 724 |
@param instance: instance we're acting on
|
| 725 |
@type instance: instance object
|
| 726 |
@param seq: nic sequence number
|
| 727 |
@type seq: int
|
| 728 |
@param nic: nic we're acting on
|
| 729 |
@type nic: nic object
|
| 730 |
@param tap: the host's tap interface this NIC corresponds to
|
| 731 |
@type tap: str
|
| 732 |
|
| 733 |
"""
|
| 734 |
|
| 735 |
if instance.tags:
|
| 736 |
tags = " ".join(instance.tags)
|
| 737 |
else:
|
| 738 |
tags = ""
|
| 739 |
|
| 740 |
env = {
|
| 741 |
"PATH": "%s:/sbin:/usr/sbin" % os.environ["PATH"], |
| 742 |
"INSTANCE": instance.name,
|
| 743 |
"MAC": nic.mac,
|
| 744 |
"MODE": nic.nicparams[constants.NIC_MODE],
|
| 745 |
"INTERFACE": tap,
|
| 746 |
"INTERFACE_INDEX": str(seq), |
| 747 |
"TAGS": tags,
|
| 748 |
} |
| 749 |
|
| 750 |
if nic.ip:
|
| 751 |
env["IP"] = nic.ip
|
| 752 |
|
| 753 |
if nic.nicparams[constants.NIC_LINK]:
|
| 754 |
env["LINK"] = nic.nicparams[constants.NIC_LINK]
|
| 755 |
|
| 756 |
if nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
|
| 757 |
env["BRIDGE"] = nic.nicparams[constants.NIC_LINK]
|
| 758 |
|
| 759 |
result = utils.RunCmd([constants.KVM_IFUP, tap], env=env) |
| 760 |
if result.failed:
|
| 761 |
raise errors.HypervisorError("Failed to configure interface %s: %s." |
| 762 |
" Network configuration script output: %s" %
|
| 763 |
(tap, result.fail_reason, result.output)) |
| 764 |
|
| 765 |
@staticmethod
|
| 766 |
def _VerifyAffinityPackage(): |
| 767 |
if affinity is None: |
| 768 |
raise errors.HypervisorError("affinity Python package not" |
| 769 |
" found; cannot use CPU pinning under KVM")
|
| 770 |
|
| 771 |
@staticmethod
|
| 772 |
def _BuildAffinityCpuMask(cpu_list): |
| 773 |
"""Create a CPU mask suitable for sched_setaffinity from a list of
|
| 774 |
CPUs.
|
| 775 |
|
| 776 |
See man taskset for more info on sched_setaffinity masks.
|
| 777 |
For example: [ 0, 2, 5, 6 ] will return 101 (0x65, 0..01100101).
|
| 778 |
|
| 779 |
@type cpu_list: list of int
|
| 780 |
@param cpu_list: list of physical CPU numbers to map to vCPUs in order
|
| 781 |
@rtype: int
|
| 782 |
@return: a bit mask of CPU affinities
|
| 783 |
|
| 784 |
"""
|
| 785 |
if cpu_list == constants.CPU_PINNING_OFF:
|
| 786 |
return constants.CPU_PINNING_ALL_KVM
|
| 787 |
else:
|
| 788 |
return sum(2 ** cpu for cpu in cpu_list) |
| 789 |
|
| 790 |
@classmethod
|
| 791 |
def _AssignCpuAffinity(cls, cpu_mask, process_id, thread_dict): |
| 792 |
"""Change CPU affinity for running VM according to given CPU mask.
|
| 793 |
|
| 794 |
@param cpu_mask: CPU mask as given by the user. e.g. "0-2,4:all:1,3"
|
| 795 |
@type cpu_mask: string
|
| 796 |
@param process_id: process ID of KVM process. Used to pin entire VM
|
| 797 |
to physical CPUs.
|
| 798 |
@type process_id: int
|
| 799 |
@param thread_dict: map of virtual CPUs to KVM thread IDs
|
| 800 |
@type thread_dict: dict int:int
|
| 801 |
|
| 802 |
"""
|
| 803 |
|
| 804 |
# Convert the string CPU mask to a list of list of int's
|
| 805 |
cpu_list = utils.ParseMultiCpuMask(cpu_mask) |
| 806 |
|
| 807 |
if len(cpu_list) == 1: |
| 808 |
all_cpu_mapping = cpu_list[0]
|
| 809 |
if all_cpu_mapping == constants.CPU_PINNING_OFF:
|
| 810 |
# If CPU pinning has 1 entry that's "all", then do nothing
|
| 811 |
pass
|
| 812 |
else:
|
| 813 |
# If CPU pinning has one non-all entry, map the entire VM to
|
| 814 |
# one set of physical CPUs
|
| 815 |
cls._VerifyAffinityPackage() |
| 816 |
affinity.set_process_affinity_mask(process_id, |
| 817 |
cls._BuildAffinityCpuMask(all_cpu_mapping)) |
| 818 |
else:
|
| 819 |
# The number of vCPUs mapped should match the number of vCPUs
|
| 820 |
# reported by KVM. This was already verified earlier, so
|
| 821 |
# here only as a sanity check.
|
| 822 |
assert len(thread_dict) == len(cpu_list) |
| 823 |
cls._VerifyAffinityPackage() |
| 824 |
|
| 825 |
# For each vCPU, map it to the proper list of physical CPUs
|
| 826 |
for vcpu, i in zip(cpu_list, range(len(cpu_list))): |
| 827 |
affinity.set_process_affinity_mask(thread_dict[i], |
| 828 |
cls._BuildAffinityCpuMask(vcpu)) |
| 829 |
|
| 830 |
def _GetVcpuThreadIds(self, instance_name): |
| 831 |
"""Get a mapping of vCPU no. to thread IDs for the instance
|
| 832 |
|
| 833 |
@type instance_name: string
|
| 834 |
@param instance_name: instance in question
|
| 835 |
@rtype: dictionary of int:int
|
| 836 |
@return: a dictionary mapping vCPU numbers to thread IDs
|
| 837 |
|
| 838 |
"""
|
| 839 |
result = {}
|
| 840 |
output = self._CallMonitorCommand(instance_name, self._CPU_INFO_CMD) |
| 841 |
for line in output.stdout.splitlines(): |
| 842 |
match = self._CPU_INFO_RE.search(line)
|
| 843 |
if not match: |
| 844 |
continue
|
| 845 |
grp = map(int, match.groups()) |
| 846 |
result[grp[0]] = grp[1] |
| 847 |
|
| 848 |
return result
|
| 849 |
|
| 850 |
def _ExecuteCpuAffinity(self, instance_name, cpu_mask): |
| 851 |
"""Complete CPU pinning.
|
| 852 |
|
| 853 |
@type instance_name: string
|
| 854 |
@param instance_name: name of instance
|
| 855 |
@type cpu_mask: string
|
| 856 |
@param cpu_mask: CPU pinning mask as entered by user
|
| 857 |
|
| 858 |
"""
|
| 859 |
# Get KVM process ID, to be used if need to pin entire VM
|
| 860 |
_, pid, _ = self._InstancePidAlive(instance_name)
|
| 861 |
# Get vCPU thread IDs, to be used if need to pin vCPUs separately
|
| 862 |
thread_dict = self._GetVcpuThreadIds(instance_name)
|
| 863 |
# Run CPU pinning, based on configured mask
|
| 864 |
self._AssignCpuAffinity(cpu_mask, pid, thread_dict)
|
| 865 |
|
| 866 |
def ListInstances(self): |
| 867 |
"""Get the list of running instances.
|
| 868 |
|
| 869 |
We can do this by listing our live instances directory and
|
| 870 |
checking whether the associated kvm process is still alive.
|
| 871 |
|
| 872 |
"""
|
| 873 |
result = [] |
| 874 |
for name in os.listdir(self._PIDS_DIR): |
| 875 |
if self._InstancePidAlive(name)[2]: |
| 876 |
result.append(name) |
| 877 |
return result
|
| 878 |
|
| 879 |
def GetInstanceInfo(self, instance_name): |
| 880 |
"""Get instance properties.
|
| 881 |
|
| 882 |
@type instance_name: string
|
| 883 |
@param instance_name: the instance name
|
| 884 |
@rtype: tuple of strings
|
| 885 |
@return: (name, id, memory, vcpus, stat, times)
|
| 886 |
|
| 887 |
"""
|
| 888 |
_, pid, alive = self._InstancePidAlive(instance_name)
|
| 889 |
if not alive: |
| 890 |
return None |
| 891 |
|
| 892 |
_, memory, vcpus = self._InstancePidInfo(pid)
|
| 893 |
stat = "---b-"
|
| 894 |
times = "0"
|
| 895 |
|
| 896 |
return (instance_name, pid, memory, vcpus, stat, times)
|
| 897 |
|
| 898 |
def GetAllInstancesInfo(self): |
| 899 |
"""Get properties of all instances.
|
| 900 |
|
| 901 |
@return: list of tuples (name, id, memory, vcpus, stat, times)
|
| 902 |
|
| 903 |
"""
|
| 904 |
data = [] |
| 905 |
for name in os.listdir(self._PIDS_DIR): |
| 906 |
try:
|
| 907 |
info = self.GetInstanceInfo(name)
|
| 908 |
except errors.HypervisorError:
|
| 909 |
continue
|
| 910 |
if info:
|
| 911 |
data.append(info) |
| 912 |
return data
|
| 913 |
|
| 914 |
def _GenerateKVMRuntime(self, instance, block_devices, startup_paused): |
| 915 |
"""Generate KVM information to start an instance.
|
| 916 |
|
| 917 |
"""
|
| 918 |
# pylint: disable=R0914,R0915
|
| 919 |
_, v_major, v_min, _ = self._GetKVMVersion()
|
| 920 |
|
| 921 |
pidfile = self._InstancePidFile(instance.name)
|
| 922 |
kvm = constants.KVM_PATH |
| 923 |
kvm_cmd = [kvm] |
| 924 |
# used just by the vnc server, if enabled
|
| 925 |
kvm_cmd.extend(["-name", instance.name])
|
| 926 |
kvm_cmd.extend(["-m", instance.beparams[constants.BE_MAXMEM]])
|
| 927 |
kvm_cmd.extend(["-smp", instance.beparams[constants.BE_VCPUS]])
|
| 928 |
kvm_cmd.extend(["-pidfile", pidfile])
|
| 929 |
kvm_cmd.extend(["-daemonize"])
|
| 930 |
if not instance.hvparams[constants.HV_ACPI]: |
| 931 |
kvm_cmd.extend(["-no-acpi"])
|
| 932 |
if instance.hvparams[constants.HV_REBOOT_BEHAVIOR] == \
|
| 933 |
constants.INSTANCE_REBOOT_EXIT: |
| 934 |
kvm_cmd.extend(["-no-reboot"])
|
| 935 |
|
| 936 |
hvp = instance.hvparams |
| 937 |
boot_disk = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_DISK |
| 938 |
boot_cdrom = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_CDROM |
| 939 |
boot_floppy = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_FLOPPY |
| 940 |
boot_network = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_NETWORK |
| 941 |
|
| 942 |
self.ValidateParameters(hvp)
|
| 943 |
|
| 944 |
if startup_paused:
|
| 945 |
kvm_cmd.extend([_KVM_START_PAUSED_FLAG]) |
| 946 |
|
| 947 |
if hvp[constants.HV_KVM_FLAG] == constants.HT_KVM_ENABLED:
|
| 948 |
kvm_cmd.extend(["-enable-kvm"])
|
| 949 |
elif hvp[constants.HV_KVM_FLAG] == constants.HT_KVM_DISABLED:
|
| 950 |
kvm_cmd.extend(["-disable-kvm"])
|
| 951 |
|
| 952 |
if boot_network:
|
| 953 |
kvm_cmd.extend(["-boot", "n"]) |
| 954 |
|
| 955 |
disk_type = hvp[constants.HV_DISK_TYPE] |
| 956 |
if disk_type == constants.HT_DISK_PARAVIRTUAL:
|
| 957 |
if_val = ",if=virtio"
|
| 958 |
else:
|
| 959 |
if_val = ",if=%s" % disk_type
|
| 960 |
# Cache mode
|
| 961 |
disk_cache = hvp[constants.HV_DISK_CACHE] |
| 962 |
if instance.disk_template in constants.DTS_EXT_MIRROR: |
| 963 |
if disk_cache != "none": |
| 964 |
# TODO: make this a hard error, instead of a silent overwrite
|
| 965 |
logging.warning("KVM: overriding disk_cache setting '%s' with 'none'"
|
| 966 |
" to prevent shared storage corruption on migration",
|
| 967 |
disk_cache) |
| 968 |
cache_val = ",cache=none"
|
| 969 |
elif disk_cache != constants.HT_CACHE_DEFAULT:
|
| 970 |
cache_val = ",cache=%s" % disk_cache
|
| 971 |
else:
|
| 972 |
cache_val = ""
|
| 973 |
for cfdev, dev_path in block_devices: |
| 974 |
if cfdev.mode != constants.DISK_RDWR:
|
| 975 |
raise errors.HypervisorError("Instance has read-only disks which" |
| 976 |
" are not supported by KVM")
|
| 977 |
# TODO: handle FD_LOOP and FD_BLKTAP (?)
|
| 978 |
boot_val = ""
|
| 979 |
if boot_disk:
|
| 980 |
kvm_cmd.extend(["-boot", "c"]) |
| 981 |
boot_disk = False
|
| 982 |
if (v_major, v_min) < (0, 14) and disk_type != constants.HT_DISK_IDE: |
| 983 |
boot_val = ",boot=on"
|
| 984 |
|
| 985 |
drive_val = "file=%s,format=raw%s%s%s" % (dev_path, if_val, boot_val,
|
| 986 |
cache_val) |
| 987 |
kvm_cmd.extend(["-drive", drive_val])
|
| 988 |
|
| 989 |
#Now we can specify a different device type for CDROM devices.
|
| 990 |
cdrom_disk_type = hvp[constants.HV_KVM_CDROM_DISK_TYPE] |
| 991 |
if not cdrom_disk_type: |
| 992 |
cdrom_disk_type = disk_type |
| 993 |
|
| 994 |
iso_image = hvp[constants.HV_CDROM_IMAGE_PATH] |
| 995 |
if iso_image:
|
| 996 |
options = ",format=raw,media=cdrom"
|
| 997 |
if boot_cdrom:
|
| 998 |
kvm_cmd.extend(["-boot", "d"]) |
| 999 |
if cdrom_disk_type != constants.HT_DISK_IDE:
|
| 1000 |
options = "%s,boot=on,if=%s" % (options, constants.HT_DISK_IDE)
|
| 1001 |
else:
|
| 1002 |
options = "%s,boot=on" % options
|
| 1003 |
else:
|
| 1004 |
if cdrom_disk_type == constants.HT_DISK_PARAVIRTUAL:
|
| 1005 |
if_val = ",if=virtio"
|
| 1006 |
else:
|
| 1007 |
if_val = ",if=%s" % cdrom_disk_type
|
| 1008 |
options = "%s%s" % (options, if_val)
|
| 1009 |
drive_val = "file=%s%s" % (iso_image, options)
|
| 1010 |
kvm_cmd.extend(["-drive", drive_val])
|
| 1011 |
|
| 1012 |
iso_image2 = hvp[constants.HV_KVM_CDROM2_IMAGE_PATH] |
| 1013 |
if iso_image2:
|
| 1014 |
options = ",format=raw,media=cdrom"
|
| 1015 |
if cdrom_disk_type == constants.HT_DISK_PARAVIRTUAL:
|
| 1016 |
if_val = ",if=virtio"
|
| 1017 |
else:
|
| 1018 |
if_val = ",if=%s" % cdrom_disk_type
|
| 1019 |
options = "%s%s" % (options, if_val)
|
| 1020 |
drive_val = "file=%s%s" % (iso_image2, options)
|
| 1021 |
kvm_cmd.extend(["-drive", drive_val])
|
| 1022 |
|
| 1023 |
floppy_image = hvp[constants.HV_KVM_FLOPPY_IMAGE_PATH] |
| 1024 |
if floppy_image:
|
| 1025 |
options = ",format=raw,media=disk"
|
| 1026 |
if boot_floppy:
|
| 1027 |
kvm_cmd.extend(["-boot", "a"]) |
| 1028 |
options = "%s,boot=on" % options
|
| 1029 |
if_val = ",if=floppy"
|
| 1030 |
options = "%s%s" % (options, if_val)
|
| 1031 |
drive_val = "file=%s%s" % (floppy_image, options)
|
| 1032 |
kvm_cmd.extend(["-drive", drive_val])
|
| 1033 |
|
| 1034 |
kernel_path = hvp[constants.HV_KERNEL_PATH] |
| 1035 |
if kernel_path:
|
| 1036 |
kvm_cmd.extend(["-kernel", kernel_path])
|
| 1037 |
initrd_path = hvp[constants.HV_INITRD_PATH] |
| 1038 |
if initrd_path:
|
| 1039 |
kvm_cmd.extend(["-initrd", initrd_path])
|
| 1040 |
root_append = ["root=%s" % hvp[constants.HV_ROOT_PATH],
|
| 1041 |
hvp[constants.HV_KERNEL_ARGS]] |
| 1042 |
if hvp[constants.HV_SERIAL_CONSOLE]:
|
| 1043 |
root_append.append("console=ttyS0,38400")
|
| 1044 |
kvm_cmd.extend(["-append", " ".join(root_append)]) |
| 1045 |
|
| 1046 |
mem_path = hvp[constants.HV_MEM_PATH] |
| 1047 |
if mem_path:
|
| 1048 |
kvm_cmd.extend(["-mem-path", mem_path, "-mem-prealloc"]) |
| 1049 |
|
| 1050 |
mouse_type = hvp[constants.HV_USB_MOUSE] |
| 1051 |
vnc_bind_address = hvp[constants.HV_VNC_BIND_ADDRESS] |
| 1052 |
|
| 1053 |
if mouse_type:
|
| 1054 |
kvm_cmd.extend(["-usb"])
|
| 1055 |
kvm_cmd.extend(["-usbdevice", mouse_type])
|
| 1056 |
elif vnc_bind_address:
|
| 1057 |
kvm_cmd.extend(["-usbdevice", constants.HT_MOUSE_TABLET])
|
| 1058 |
|
| 1059 |
keymap = hvp[constants.HV_KEYMAP] |
| 1060 |
if keymap:
|
| 1061 |
keymap_path = self._InstanceKeymapFile(instance.name)
|
| 1062 |
# If a keymap file is specified, KVM won't use its internal defaults. By
|
| 1063 |
# first including the "en-us" layout, an error on loading the actual
|
| 1064 |
# layout (e.g. because it can't be found) won't lead to a non-functional
|
| 1065 |
# keyboard. A keyboard with incorrect keys is still better than none.
|
| 1066 |
utils.WriteFile(keymap_path, data="include en-us\ninclude %s\n" % keymap)
|
| 1067 |
kvm_cmd.extend(["-k", keymap_path])
|
| 1068 |
|
| 1069 |
if vnc_bind_address:
|
| 1070 |
if netutils.IP4Address.IsValid(vnc_bind_address):
|
| 1071 |
if instance.network_port > constants.VNC_BASE_PORT:
|
| 1072 |
display = instance.network_port - constants.VNC_BASE_PORT |
| 1073 |
if vnc_bind_address == constants.IP4_ADDRESS_ANY:
|
| 1074 |
vnc_arg = ":%d" % (display)
|
| 1075 |
else:
|
| 1076 |
vnc_arg = "%s:%d" % (vnc_bind_address, display)
|
| 1077 |
else:
|
| 1078 |
logging.error("Network port is not a valid VNC display (%d < %d)."
|
| 1079 |
" Not starting VNC", instance.network_port,
|
| 1080 |
constants.VNC_BASE_PORT) |
| 1081 |
vnc_arg = "none"
|
| 1082 |
|
| 1083 |
# Only allow tls and other option when not binding to a file, for now.
|
| 1084 |
# kvm/qemu gets confused otherwise about the filename to use.
|
| 1085 |
vnc_append = ""
|
| 1086 |
if hvp[constants.HV_VNC_TLS]:
|
| 1087 |
vnc_append = "%s,tls" % vnc_append
|
| 1088 |
if hvp[constants.HV_VNC_X509_VERIFY]:
|
| 1089 |
vnc_append = "%s,x509verify=%s" % (vnc_append,
|
| 1090 |
hvp[constants.HV_VNC_X509]) |
| 1091 |
elif hvp[constants.HV_VNC_X509]:
|
| 1092 |
vnc_append = "%s,x509=%s" % (vnc_append,
|
| 1093 |
hvp[constants.HV_VNC_X509]) |
| 1094 |
if hvp[constants.HV_VNC_PASSWORD_FILE]:
|
| 1095 |
vnc_append = "%s,password" % vnc_append
|
| 1096 |
|
| 1097 |
vnc_arg = "%s%s" % (vnc_arg, vnc_append)
|
| 1098 |
|
| 1099 |
else:
|
| 1100 |
vnc_arg = "unix:%s/%s.vnc" % (vnc_bind_address, instance.name)
|
| 1101 |
|
| 1102 |
kvm_cmd.extend(["-vnc", vnc_arg])
|
| 1103 |
else:
|
| 1104 |
kvm_cmd.extend(["-nographic"])
|
| 1105 |
|
| 1106 |
monitor_dev = ("unix:%s,server,nowait" %
|
| 1107 |
self._InstanceMonitor(instance.name))
|
| 1108 |
kvm_cmd.extend(["-monitor", monitor_dev])
|
| 1109 |
if hvp[constants.HV_SERIAL_CONSOLE]:
|
| 1110 |
serial_dev = ("unix:%s,server,nowait" %
|
| 1111 |
self._InstanceSerial(instance.name))
|
| 1112 |
kvm_cmd.extend(["-serial", serial_dev])
|
| 1113 |
else:
|
| 1114 |
kvm_cmd.extend(["-serial", "none"]) |
| 1115 |
|
| 1116 |
spice_bind = hvp[constants.HV_KVM_SPICE_BIND] |
| 1117 |
spice_ip_version = None
|
| 1118 |
if spice_bind:
|
| 1119 |
if netutils.IsValidInterface(spice_bind):
|
| 1120 |
# The user specified a network interface, we have to figure out the IP
|
| 1121 |
# address.
|
| 1122 |
addresses = netutils.GetInterfaceIpAddresses(spice_bind) |
| 1123 |
spice_ip_version = hvp[constants.HV_KVM_SPICE_IP_VERSION] |
| 1124 |
|
| 1125 |
# if the user specified an IP version and the interface does not
|
| 1126 |
# have that kind of IP addresses, throw an exception
|
| 1127 |
if spice_ip_version != constants.IFACE_NO_IP_VERSION_SPECIFIED:
|
| 1128 |
if not addresses[spice_ip_version]: |
| 1129 |
raise errors.HypervisorError("spice: unable to get an IPv%s address" |
| 1130 |
" for %s" % (spice_ip_version,
|
| 1131 |
spice_bind)) |
| 1132 |
|
| 1133 |
# the user did not specify an IP version, we have to figure it out
|
| 1134 |
elif (addresses[constants.IP4_VERSION] and |
| 1135 |
addresses[constants.IP6_VERSION]): |
| 1136 |
# we have both ipv4 and ipv6, let's use the cluster default IP
|
| 1137 |
# version
|
| 1138 |
cluster_family = ssconf.SimpleStore().GetPrimaryIPFamily() |
| 1139 |
spice_ip_version = netutils.IPAddress.GetVersionFromAddressFamily( |
| 1140 |
cluster_family) |
| 1141 |
elif addresses[constants.IP4_VERSION]:
|
| 1142 |
spice_ip_version = constants.IP4_VERSION |
| 1143 |
elif addresses[constants.IP6_VERSION]:
|
| 1144 |
spice_ip_version = constants.IP6_VERSION |
| 1145 |
else:
|
| 1146 |
raise errors.HypervisorError("spice: unable to get an IP address" |
| 1147 |
" for %s" % (spice_bind))
|
| 1148 |
|
| 1149 |
spice_address = addresses[spice_ip_version][0]
|
| 1150 |
|
| 1151 |
else:
|
| 1152 |
# spice_bind is known to be a valid IP address, because
|
| 1153 |
# ValidateParameters checked it.
|
| 1154 |
spice_address = spice_bind |
| 1155 |
|
| 1156 |
spice_arg = "addr=%s" % spice_address
|
| 1157 |
if hvp[constants.HV_KVM_SPICE_USE_TLS]:
|
| 1158 |
spice_arg = "%s,tls-port=%s,x509-cacert-file=%s" % (spice_arg,
|
| 1159 |
instance.network_port, constants.SPICE_CACERT_FILE) |
| 1160 |
spice_arg = "%s,x509-key-file=%s,x509-cert-file=%s" % (spice_arg,
|
| 1161 |
constants.SPICE_CERT_FILE, constants.SPICE_CERT_FILE) |
| 1162 |
tls_ciphers = hvp[constants.HV_KVM_SPICE_TLS_CIPHERS] |
| 1163 |
if tls_ciphers:
|
| 1164 |
spice_arg = "%s,tls-ciphers=%s" % (spice_arg, tls_ciphers)
|
| 1165 |
else:
|
| 1166 |
spice_arg = "%s,port=%s" % (spice_arg, instance.network_port)
|
| 1167 |
|
| 1168 |
if not hvp[constants.HV_KVM_SPICE_PASSWORD_FILE]: |
| 1169 |
spice_arg = "%s,disable-ticketing" % spice_arg
|
| 1170 |
|
| 1171 |
if spice_ip_version:
|
| 1172 |
spice_arg = "%s,ipv%s" % (spice_arg, spice_ip_version)
|
| 1173 |
|
| 1174 |
# Image compression options
|
| 1175 |
img_lossless = hvp[constants.HV_KVM_SPICE_LOSSLESS_IMG_COMPR] |
| 1176 |
img_jpeg = hvp[constants.HV_KVM_SPICE_JPEG_IMG_COMPR] |
| 1177 |
img_zlib_glz = hvp[constants.HV_KVM_SPICE_ZLIB_GLZ_IMG_COMPR] |
| 1178 |
if img_lossless:
|
| 1179 |
spice_arg = "%s,image-compression=%s" % (spice_arg, img_lossless)
|
| 1180 |
if img_jpeg:
|
| 1181 |
spice_arg = "%s,jpeg-wan-compression=%s" % (spice_arg, img_jpeg)
|
| 1182 |
if img_zlib_glz:
|
| 1183 |
spice_arg = "%s,zlib-glz-wan-compression=%s" % (spice_arg, img_zlib_glz)
|
| 1184 |
|
| 1185 |
# Video stream detection
|
| 1186 |
video_streaming = hvp[constants.HV_KVM_SPICE_STREAMING_VIDEO_DETECTION] |
| 1187 |
if video_streaming:
|
| 1188 |
spice_arg = "%s,streaming-video=%s" % (spice_arg, video_streaming)
|
| 1189 |
|
| 1190 |
# Audio compression, by default in qemu-kvm it is on
|
| 1191 |
if not hvp[constants.HV_KVM_SPICE_AUDIO_COMPR]: |
| 1192 |
spice_arg = "%s,playback-compression=off" % spice_arg
|
| 1193 |
if not hvp[constants.HV_KVM_SPICE_USE_VDAGENT]: |
| 1194 |
spice_arg = "%s,agent-mouse=off" % spice_arg
|
| 1195 |
|
| 1196 |
logging.info("KVM: SPICE will listen on port %s", instance.network_port)
|
| 1197 |
kvm_cmd.extend(["-spice", spice_arg])
|
| 1198 |
|
| 1199 |
# Tell kvm to use the paravirtualized graphic card, optimized for SPICE
|
| 1200 |
kvm_cmd.extend(["-vga", "qxl"]) |
| 1201 |
|
| 1202 |
if hvp[constants.HV_USE_LOCALTIME]:
|
| 1203 |
kvm_cmd.extend(["-localtime"])
|
| 1204 |
|
| 1205 |
if hvp[constants.HV_KVM_USE_CHROOT]:
|
| 1206 |
kvm_cmd.extend(["-chroot", self._InstanceChrootDir(instance.name)]) |
| 1207 |
|
| 1208 |
# Save the current instance nics, but defer their expansion as parameters,
|
| 1209 |
# as we'll need to generate executable temp files for them.
|
| 1210 |
kvm_nics = instance.nics |
| 1211 |
hvparams = hvp |
| 1212 |
|
| 1213 |
return (kvm_cmd, kvm_nics, hvparams)
|
| 1214 |
|
| 1215 |
def _WriteKVMRuntime(self, instance_name, data): |
| 1216 |
"""Write an instance's KVM runtime
|
| 1217 |
|
| 1218 |
"""
|
| 1219 |
try:
|
| 1220 |
utils.WriteFile(self._InstanceKVMRuntime(instance_name),
|
| 1221 |
data=data) |
| 1222 |
except EnvironmentError, err: |
| 1223 |
raise errors.HypervisorError("Failed to save KVM runtime file: %s" % err) |
| 1224 |
|
| 1225 |
def _ReadKVMRuntime(self, instance_name): |
| 1226 |
"""Read an instance's KVM runtime
|
| 1227 |
|
| 1228 |
"""
|
| 1229 |
try:
|
| 1230 |
file_content = utils.ReadFile(self._InstanceKVMRuntime(instance_name))
|
| 1231 |
except EnvironmentError, err: |
| 1232 |
raise errors.HypervisorError("Failed to load KVM runtime file: %s" % err) |
| 1233 |
return file_content
|
| 1234 |
|
| 1235 |
def _SaveKVMRuntime(self, instance, kvm_runtime): |
| 1236 |
"""Save an instance's KVM runtime
|
| 1237 |
|
| 1238 |
"""
|
| 1239 |
kvm_cmd, kvm_nics, hvparams = kvm_runtime |
| 1240 |
serialized_nics = [nic.ToDict() for nic in kvm_nics] |
| 1241 |
serialized_form = serializer.Dump((kvm_cmd, serialized_nics, hvparams)) |
| 1242 |
self._WriteKVMRuntime(instance.name, serialized_form)
|
| 1243 |
|
| 1244 |
def _LoadKVMRuntime(self, instance, serialized_runtime=None): |
| 1245 |
"""Load an instance's KVM runtime
|
| 1246 |
|
| 1247 |
"""
|
| 1248 |
if not serialized_runtime: |
| 1249 |
serialized_runtime = self._ReadKVMRuntime(instance.name)
|
| 1250 |
loaded_runtime = serializer.Load(serialized_runtime) |
| 1251 |
kvm_cmd, serialized_nics, hvparams = loaded_runtime |
| 1252 |
kvm_nics = [objects.NIC.FromDict(snic) for snic in serialized_nics] |
| 1253 |
return (kvm_cmd, kvm_nics, hvparams)
|
| 1254 |
|
| 1255 |
def _RunKVMCmd(self, name, kvm_cmd, tap_fds=None): |
| 1256 |
"""Run the KVM cmd and check for errors
|
| 1257 |
|
| 1258 |
@type name: string
|
| 1259 |
@param name: instance name
|
| 1260 |
@type kvm_cmd: list of strings
|
| 1261 |
@param kvm_cmd: runcmd input for kvm
|
| 1262 |
@type tap_fds: list of int
|
| 1263 |
@param tap_fds: fds of tap devices opened by Ganeti
|
| 1264 |
|
| 1265 |
"""
|
| 1266 |
try:
|
| 1267 |
result = utils.RunCmd(kvm_cmd, noclose_fds=tap_fds) |
| 1268 |
finally:
|
| 1269 |
for fd in tap_fds: |
| 1270 |
utils_wrapper.CloseFdNoError(fd) |
| 1271 |
|
| 1272 |
if result.failed:
|
| 1273 |
raise errors.HypervisorError("Failed to start instance %s: %s (%s)" % |
| 1274 |
(name, result.fail_reason, result.output)) |
| 1275 |
if not self._InstancePidAlive(name)[2]: |
| 1276 |
raise errors.HypervisorError("Failed to start instance %s" % name) |
| 1277 |
|
| 1278 |
def _ExecuteKVMRuntime(self, instance, kvm_runtime, incoming=None): |
| 1279 |
"""Execute a KVM cmd, after completing it with some last minute data
|
| 1280 |
|
| 1281 |
@type incoming: tuple of strings
|
| 1282 |
@param incoming: (target_host_ip, port)
|
| 1283 |
|
| 1284 |
"""
|
| 1285 |
# Small _ExecuteKVMRuntime hv parameters programming howto:
|
| 1286 |
# - conf_hvp contains the parameters as configured on ganeti. they might
|
| 1287 |
# have changed since the instance started; only use them if the change
|
| 1288 |
# won't affect the inside of the instance (which hasn't been rebooted).
|
| 1289 |
# - up_hvp contains the parameters as they were when the instance was
|
| 1290 |
# started, plus any new parameter which has been added between ganeti
|
| 1291 |
# versions: it is paramount that those default to a value which won't
|
| 1292 |
# affect the inside of the instance as well.
|
| 1293 |
conf_hvp = instance.hvparams |
| 1294 |
name = instance.name |
| 1295 |
self._CheckDown(name)
|
| 1296 |
|
| 1297 |
temp_files = [] |
| 1298 |
|
| 1299 |
kvm_cmd, kvm_nics, up_hvp = kvm_runtime |
| 1300 |
up_hvp = objects.FillDict(conf_hvp, up_hvp) |
| 1301 |
|
| 1302 |
_, v_major, v_min, _ = self._GetKVMVersion()
|
| 1303 |
|
| 1304 |
# We know it's safe to run as a different user upon migration, so we'll use
|
| 1305 |
# the latest conf, from conf_hvp.
|
| 1306 |
security_model = conf_hvp[constants.HV_SECURITY_MODEL] |
| 1307 |
if security_model == constants.HT_SM_USER:
|
| 1308 |
kvm_cmd.extend(["-runas", conf_hvp[constants.HV_SECURITY_DOMAIN]])
|
| 1309 |
|
| 1310 |
# We have reasons to believe changing something like the nic driver/type
|
| 1311 |
# upon migration won't exactly fly with the instance kernel, so for nic
|
| 1312 |
# related parameters we'll use up_hvp
|
| 1313 |
tapfds = [] |
| 1314 |
taps = [] |
| 1315 |
if not kvm_nics: |
| 1316 |
kvm_cmd.extend(["-net", "none"]) |
| 1317 |
else:
|
| 1318 |
vnet_hdr = False
|
| 1319 |
tap_extra = ""
|
| 1320 |
nic_type = up_hvp[constants.HV_NIC_TYPE] |
| 1321 |
if nic_type == constants.HT_NIC_PARAVIRTUAL:
|
| 1322 |
# From version 0.12.0, kvm uses a new sintax for network configuration.
|
| 1323 |
if (v_major, v_min) >= (0, 12): |
| 1324 |
nic_model = "virtio-net-pci"
|
| 1325 |
vnet_hdr = True
|
| 1326 |
else:
|
| 1327 |
nic_model = "virtio"
|
| 1328 |
|
| 1329 |
if up_hvp[constants.HV_VHOST_NET]:
|
| 1330 |
# vhost_net is only available from version 0.13.0 or newer
|
| 1331 |
if (v_major, v_min) >= (0, 13): |
| 1332 |
tap_extra = ",vhost=on"
|
| 1333 |
else:
|
| 1334 |
raise errors.HypervisorError("vhost_net is configured" |
| 1335 |
" but it is not available")
|
| 1336 |
else:
|
| 1337 |
nic_model = nic_type |
| 1338 |
|
| 1339 |
for nic_seq, nic in enumerate(kvm_nics): |
| 1340 |
tapname, tapfd = _OpenTap(vnet_hdr) |
| 1341 |
tapfds.append(tapfd) |
| 1342 |
taps.append(tapname) |
| 1343 |
if (v_major, v_min) >= (0, 12): |
| 1344 |
nic_val = "%s,mac=%s,netdev=netdev%s" % (nic_model, nic.mac, nic_seq)
|
| 1345 |
tap_val = "type=tap,id=netdev%s,fd=%d%s" % (nic_seq, tapfd, tap_extra)
|
| 1346 |
kvm_cmd.extend(["-netdev", tap_val, "-device", nic_val]) |
| 1347 |
else:
|
| 1348 |
nic_val = "nic,vlan=%s,macaddr=%s,model=%s" % (nic_seq,
|
| 1349 |
nic.mac, nic_model) |
| 1350 |
tap_val = "tap,vlan=%s,fd=%d" % (nic_seq, tapfd)
|
| 1351 |
kvm_cmd.extend(["-net", tap_val, "-net", nic_val]) |
| 1352 |
|
| 1353 |
if incoming:
|
| 1354 |
target, port = incoming |
| 1355 |
kvm_cmd.extend(["-incoming", "tcp:%s:%s" % (target, port)]) |
| 1356 |
|
| 1357 |
# Changing the vnc password doesn't bother the guest that much. At most it
|
| 1358 |
# will surprise people who connect to it. Whether positively or negatively
|
| 1359 |
# it's debatable.
|
| 1360 |
vnc_pwd_file = conf_hvp[constants.HV_VNC_PASSWORD_FILE] |
| 1361 |
vnc_pwd = None
|
| 1362 |
if vnc_pwd_file:
|
| 1363 |
try:
|
| 1364 |
vnc_pwd = utils.ReadOneLineFile(vnc_pwd_file, strict=True)
|
| 1365 |
except EnvironmentError, err: |
| 1366 |
raise errors.HypervisorError("Failed to open VNC password file %s: %s" |
| 1367 |
% (vnc_pwd_file, err)) |
| 1368 |
|
| 1369 |
if conf_hvp[constants.HV_KVM_USE_CHROOT]:
|
| 1370 |
utils.EnsureDirs([(self._InstanceChrootDir(name),
|
| 1371 |
constants.SECURE_DIR_MODE)]) |
| 1372 |
|
| 1373 |
# Automatically enable QMP if version is >= 0.14
|
| 1374 |
if (v_major, v_min) >= (0, 14): |
| 1375 |
logging.debug("Enabling QMP")
|
| 1376 |
kvm_cmd.extend(["-qmp", "unix:%s,server,nowait" % |
| 1377 |
self._InstanceQmpMonitor(instance.name)])
|
| 1378 |
|
| 1379 |
# Configure the network now for starting instances and bridged interfaces,
|
| 1380 |
# during FinalizeMigration for incoming instances' routed interfaces
|
| 1381 |
for nic_seq, nic in enumerate(kvm_nics): |
| 1382 |
if (incoming and |
| 1383 |
nic.nicparams[constants.NIC_MODE] != constants.NIC_MODE_BRIDGED): |
| 1384 |
continue
|
| 1385 |
self._ConfigureNIC(instance, nic_seq, nic, taps[nic_seq])
|
| 1386 |
|
| 1387 |
# CPU affinity requires kvm to start paused, so we set this flag if the
|
| 1388 |
# instance is not already paused and if we are not going to accept a
|
| 1389 |
# migrating instance. In the latter case, pausing is not needed.
|
| 1390 |
start_kvm_paused = not (_KVM_START_PAUSED_FLAG in kvm_cmd) and not incoming |
| 1391 |
|
| 1392 |
# Note: CPU pinning is using up_hvp since changes take effect
|
| 1393 |
# during instance startup anyway, and to avoid problems when soft
|
| 1394 |
# rebooting the instance.
|
| 1395 |
cpu_pinning = False
|
| 1396 |
if up_hvp.get(constants.HV_CPU_MASK, None): |
| 1397 |
cpu_pinning = True
|
| 1398 |
if start_kvm_paused:
|
| 1399 |
kvm_cmd.extend([_KVM_START_PAUSED_FLAG]) |
| 1400 |
|
| 1401 |
if security_model == constants.HT_SM_POOL:
|
| 1402 |
ss = ssconf.SimpleStore() |
| 1403 |
uid_pool = uidpool.ParseUidPool(ss.GetUidPool(), separator="\n")
|
| 1404 |
all_uids = set(uidpool.ExpandUidPool(uid_pool))
|
| 1405 |
uid = uidpool.RequestUnusedUid(all_uids) |
| 1406 |
try:
|
| 1407 |
username = pwd.getpwuid(uid.GetUid()).pw_name |
| 1408 |
kvm_cmd.extend(["-runas", username])
|
| 1409 |
self._RunKVMCmd(name, kvm_cmd, tapfds)
|
| 1410 |
except:
|
| 1411 |
uidpool.ReleaseUid(uid) |
| 1412 |
raise
|
| 1413 |
else:
|
| 1414 |
uid.Unlock() |
| 1415 |
utils.WriteFile(self._InstanceUidFile(name), data=uid.AsStr())
|
| 1416 |
else:
|
| 1417 |
self._RunKVMCmd(name, kvm_cmd, tapfds)
|
| 1418 |
|
| 1419 |
utils.EnsureDirs([(self._InstanceNICDir(instance.name),
|
| 1420 |
constants.RUN_DIRS_MODE)]) |
| 1421 |
for nic_seq, tap in enumerate(taps): |
| 1422 |
utils.WriteFile(self._InstanceNICFile(instance.name, nic_seq),
|
| 1423 |
data=tap) |
| 1424 |
|
| 1425 |
if vnc_pwd:
|
| 1426 |
change_cmd = "change vnc password %s" % vnc_pwd
|
| 1427 |
self._CallMonitorCommand(instance.name, change_cmd)
|
| 1428 |
|
| 1429 |
# Setting SPICE password. We are not vulnerable to malicious passwordless
|
| 1430 |
# connection attempts because SPICE by default does not allow connections
|
| 1431 |
# if neither a password nor the "disable_ticketing" options are specified.
|
| 1432 |
# As soon as we send the password via QMP, that password is a valid ticket
|
| 1433 |
# for connection.
|
| 1434 |
spice_password_file = conf_hvp[constants.HV_KVM_SPICE_PASSWORD_FILE] |
| 1435 |
if spice_password_file:
|
| 1436 |
try:
|
| 1437 |
spice_pwd = utils.ReadOneLineFile(spice_password_file, strict=True)
|
| 1438 |
qmp = QmpConnection(self._InstanceQmpMonitor(instance.name))
|
| 1439 |
qmp.connect() |
| 1440 |
arguments = {
|
| 1441 |
"protocol": "spice", |
| 1442 |
"password": spice_pwd,
|
| 1443 |
} |
| 1444 |
qmp.Execute("set_password", arguments)
|
| 1445 |
except EnvironmentError, err: |
| 1446 |
raise errors.HypervisorError("Failed to open SPICE password file %s: %s" |
| 1447 |
% (spice_password_file, err)) |
| 1448 |
|
| 1449 |
for filename in temp_files: |
| 1450 |
utils.RemoveFile(filename) |
| 1451 |
|
| 1452 |
# If requested, set CPU affinity and resume instance execution
|
| 1453 |
if cpu_pinning:
|
| 1454 |
try:
|
| 1455 |
self._ExecuteCpuAffinity(instance.name, up_hvp[constants.HV_CPU_MASK])
|
| 1456 |
finally:
|
| 1457 |
if start_kvm_paused:
|
| 1458 |
# To control CPU pinning, the VM was started frozen, so we need
|
| 1459 |
# to resume its execution, but only if freezing was not
|
| 1460 |
# explicitly requested.
|
| 1461 |
# Note: this is done even when an exception occurred so the VM
|
| 1462 |
# is not unintentionally frozen.
|
| 1463 |
self._CallMonitorCommand(instance.name, self._CONT_CMD) |
| 1464 |
|
| 1465 |
def StartInstance(self, instance, block_devices, startup_paused): |
| 1466 |
"""Start an instance.
|
| 1467 |
|
| 1468 |
"""
|
| 1469 |
self._CheckDown(instance.name)
|
| 1470 |
kvm_runtime = self._GenerateKVMRuntime(instance, block_devices,
|
| 1471 |
startup_paused) |
| 1472 |
self._SaveKVMRuntime(instance, kvm_runtime)
|
| 1473 |
self._ExecuteKVMRuntime(instance, kvm_runtime)
|
| 1474 |
|
| 1475 |
def _CallMonitorCommand(self, instance_name, command): |
| 1476 |
"""Invoke a command on the instance monitor.
|
| 1477 |
|
| 1478 |
"""
|
| 1479 |
socat = ("echo %s | %s STDIO UNIX-CONNECT:%s" %
|
| 1480 |
(utils.ShellQuote(command), |
| 1481 |
constants.SOCAT_PATH, |
| 1482 |
utils.ShellQuote(self._InstanceMonitor(instance_name))))
|
| 1483 |
result = utils.RunCmd(socat) |
| 1484 |
if result.failed:
|
| 1485 |
msg = ("Failed to send command '%s' to instance %s."
|
| 1486 |
" output: %s, error: %s, fail_reason: %s" %
|
| 1487 |
(command, instance_name, |
| 1488 |
result.stdout, result.stderr, result.fail_reason)) |
| 1489 |
raise errors.HypervisorError(msg)
|
| 1490 |
|
| 1491 |
return result
|
| 1492 |
|
| 1493 |
@classmethod
|
| 1494 |
def _GetKVMVersion(cls): |
| 1495 |
"""Return the installed KVM version.
|
| 1496 |
|
| 1497 |
@return: (version, v_maj, v_min, v_rev)
|
| 1498 |
@raise L{errors.HypervisorError}: when the KVM version cannot be retrieved
|
| 1499 |
|
| 1500 |
"""
|
| 1501 |
result = utils.RunCmd([constants.KVM_PATH, "--help"])
|
| 1502 |
if result.failed:
|
| 1503 |
raise errors.HypervisorError("Unable to get KVM version") |
| 1504 |
match = cls._VERSION_RE.search(result.output.splitlines()[0])
|
| 1505 |
if not match: |
| 1506 |
raise errors.HypervisorError("Unable to get KVM version") |
| 1507 |
|
| 1508 |
return (match.group(0), int(match.group(1)), int(match.group(2)), |
| 1509 |
int(match.group(3))) |
| 1510 |
|
| 1511 |
def StopInstance(self, instance, force=False, retry=False, name=None): |
| 1512 |
"""Stop an instance.
|
| 1513 |
|
| 1514 |
"""
|
| 1515 |
if name is not None and not force: |
| 1516 |
raise errors.HypervisorError("Cannot shutdown cleanly by name only") |
| 1517 |
if name is None: |
| 1518 |
name = instance.name |
| 1519 |
acpi = instance.hvparams[constants.HV_ACPI] |
| 1520 |
else:
|
| 1521 |
acpi = False
|
| 1522 |
_, pid, alive = self._InstancePidAlive(name)
|
| 1523 |
if pid > 0 and alive: |
| 1524 |
if force or not acpi: |
| 1525 |
utils.KillProcess(pid) |
| 1526 |
else:
|
| 1527 |
self._CallMonitorCommand(name, "system_powerdown") |
| 1528 |
|
| 1529 |
def CleanupInstance(self, instance_name): |
| 1530 |
"""Cleanup after a stopped instance
|
| 1531 |
|
| 1532 |
"""
|
| 1533 |
pidfile, pid, alive = self._InstancePidAlive(instance_name)
|
| 1534 |
if pid > 0 and alive: |
| 1535 |
raise errors.HypervisorError("Cannot cleanup a live instance") |
| 1536 |
self._RemoveInstanceRuntimeFiles(pidfile, instance_name)
|
| 1537 |
|
| 1538 |
def RebootInstance(self, instance): |
| 1539 |
"""Reboot an instance.
|
| 1540 |
|
| 1541 |
"""
|
| 1542 |
# For some reason if we do a 'send-key ctrl-alt-delete' to the control
|
| 1543 |
# socket the instance will stop, but now power up again. So we'll resort
|
| 1544 |
# to shutdown and restart.
|
| 1545 |
_, _, alive = self._InstancePidAlive(instance.name)
|
| 1546 |
if not alive: |
| 1547 |
raise errors.HypervisorError("Failed to reboot instance %s:" |
| 1548 |
" not running" % instance.name)
|
| 1549 |
# StopInstance will delete the saved KVM runtime so:
|
| 1550 |
# ...first load it...
|
| 1551 |
kvm_runtime = self._LoadKVMRuntime(instance)
|
| 1552 |
# ...now we can safely call StopInstance...
|
| 1553 |
if not self.StopInstance(instance): |
| 1554 |
self.StopInstance(instance, force=True) |
| 1555 |
# ...and finally we can save it again, and execute it...
|
| 1556 |
self._SaveKVMRuntime(instance, kvm_runtime)
|
| 1557 |
self._ExecuteKVMRuntime(instance, kvm_runtime)
|
| 1558 |
|
| 1559 |
def MigrationInfo(self, instance): |
| 1560 |
"""Get instance information to perform a migration.
|
| 1561 |
|
| 1562 |
@type instance: L{objects.Instance}
|
| 1563 |
@param instance: instance to be migrated
|
| 1564 |
@rtype: string
|
| 1565 |
@return: content of the KVM runtime file
|
| 1566 |
|
| 1567 |
"""
|
| 1568 |
return self._ReadKVMRuntime(instance.name) |
| 1569 |
|
| 1570 |
def AcceptInstance(self, instance, info, target): |
| 1571 |
"""Prepare to accept an instance.
|
| 1572 |
|
| 1573 |
@type instance: L{objects.Instance}
|
| 1574 |
@param instance: instance to be accepted
|
| 1575 |
@type info: string
|
| 1576 |
@param info: content of the KVM runtime file on the source node
|
| 1577 |
@type target: string
|
| 1578 |
@param target: target host (usually ip), on this node
|
| 1579 |
|
| 1580 |
"""
|
| 1581 |
kvm_runtime = self._LoadKVMRuntime(instance, serialized_runtime=info)
|
| 1582 |
incoming_address = (target, instance.hvparams[constants.HV_MIGRATION_PORT]) |
| 1583 |
self._ExecuteKVMRuntime(instance, kvm_runtime, incoming=incoming_address)
|
| 1584 |
|
| 1585 |
def FinalizeMigrationDst(self, instance, info, success): |
| 1586 |
"""Finalize the instance migration on the target node.
|
| 1587 |
|
| 1588 |
Stop the incoming mode KVM.
|
| 1589 |
|
| 1590 |
@type instance: L{objects.Instance}
|
| 1591 |
@param instance: instance whose migration is being finalized
|
| 1592 |
|
| 1593 |
"""
|
| 1594 |
if success:
|
| 1595 |
kvm_runtime = self._LoadKVMRuntime(instance, serialized_runtime=info)
|
| 1596 |
kvm_nics = kvm_runtime[1]
|
| 1597 |
|
| 1598 |
for nic_seq, nic in enumerate(kvm_nics): |
| 1599 |
if nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
|
| 1600 |
# Bridged interfaces have already been configured
|
| 1601 |
continue
|
| 1602 |
try:
|
| 1603 |
tap = utils.ReadFile(self._InstanceNICFile(instance.name, nic_seq))
|
| 1604 |
except EnvironmentError, err: |
| 1605 |
logging.warning("Failed to find host interface for %s NIC #%d: %s",
|
| 1606 |
instance.name, nic_seq, str(err))
|
| 1607 |
continue
|
| 1608 |
try:
|
| 1609 |
self._ConfigureNIC(instance, nic_seq, nic, tap)
|
| 1610 |
except errors.HypervisorError, err:
|
| 1611 |
logging.warning(str(err))
|
| 1612 |
|
| 1613 |
self._WriteKVMRuntime(instance.name, info)
|
| 1614 |
else:
|
| 1615 |
self.StopInstance(instance, force=True) |
| 1616 |
|
| 1617 |
def MigrateInstance(self, instance, target, live): |
| 1618 |
"""Migrate an instance to a target node.
|
| 1619 |
|
| 1620 |
The migration will not be attempted if the instance is not
|
| 1621 |
currently running.
|
| 1622 |
|
| 1623 |
@type instance: L{objects.Instance}
|
| 1624 |
@param instance: the instance to be migrated
|
| 1625 |
@type target: string
|
| 1626 |
@param target: ip address of the target node
|
| 1627 |
@type live: boolean
|
| 1628 |
@param live: perform a live migration
|
| 1629 |
|
| 1630 |
"""
|
| 1631 |
instance_name = instance.name |
| 1632 |
port = instance.hvparams[constants.HV_MIGRATION_PORT] |
| 1633 |
_, _, alive = self._InstancePidAlive(instance_name)
|
| 1634 |
if not alive: |
| 1635 |
raise errors.HypervisorError("Instance not running, cannot migrate") |
| 1636 |
|
| 1637 |
if not live: |
| 1638 |
self._CallMonitorCommand(instance_name, "stop") |
| 1639 |
|
| 1640 |
migrate_command = ("migrate_set_speed %dm" %
|
| 1641 |
instance.hvparams[constants.HV_MIGRATION_BANDWIDTH]) |
| 1642 |
self._CallMonitorCommand(instance_name, migrate_command)
|
| 1643 |
|
| 1644 |
migrate_command = ("migrate_set_downtime %dms" %
|
| 1645 |
instance.hvparams[constants.HV_MIGRATION_DOWNTIME]) |
| 1646 |
self._CallMonitorCommand(instance_name, migrate_command)
|
| 1647 |
|
| 1648 |
migrate_command = "migrate -d tcp:%s:%s" % (target, port)
|
| 1649 |
self._CallMonitorCommand(instance_name, migrate_command)
|
| 1650 |
|
| 1651 |
def FinalizeMigrationSource(self, instance, success, live): |
| 1652 |
"""Finalize the instance migration on the source node.
|
| 1653 |
|
| 1654 |
@type instance: L{objects.Instance}
|
| 1655 |
@param instance: the instance that was migrated
|
| 1656 |
@type success: bool
|
| 1657 |
@param success: whether the migration succeeded or not
|
| 1658 |
@type live: bool
|
| 1659 |
@param live: whether the user requested a live migration or not
|
| 1660 |
|
| 1661 |
"""
|
| 1662 |
if success:
|
| 1663 |
pidfile, pid, _ = self._InstancePidAlive(instance.name)
|
| 1664 |
utils.KillProcess(pid) |
| 1665 |
self._RemoveInstanceRuntimeFiles(pidfile, instance.name)
|
| 1666 |
elif live:
|
| 1667 |
self._CallMonitorCommand(instance.name, self._CONT_CMD) |
| 1668 |
|
| 1669 |
def GetMigrationStatus(self, instance): |
| 1670 |
"""Get the migration status
|
| 1671 |
|
| 1672 |
@type instance: L{objects.Instance}
|
| 1673 |
@param instance: the instance that is being migrated
|
| 1674 |
@rtype: L{objects.MigrationStatus}
|
| 1675 |
@return: the status of the current migration (one of
|
| 1676 |
L{constants.HV_MIGRATION_VALID_STATUSES}), plus any additional
|
| 1677 |
progress info that can be retrieved from the hypervisor
|
| 1678 |
|
| 1679 |
"""
|
| 1680 |
info_command = "info migrate"
|
| 1681 |
for _ in range(self._MIGRATION_INFO_MAX_BAD_ANSWERS): |
| 1682 |
result = self._CallMonitorCommand(instance.name, info_command)
|
| 1683 |
match = self._MIGRATION_STATUS_RE.search(result.stdout)
|
| 1684 |
if not match: |
| 1685 |
if not result.stdout: |
| 1686 |
logging.info("KVM: empty 'info migrate' result")
|
| 1687 |
else:
|
| 1688 |
logging.warning("KVM: unknown 'info migrate' result: %s",
|
| 1689 |
result.stdout) |
| 1690 |
else:
|
| 1691 |
status = match.group(1)
|
| 1692 |
if status in constants.HV_KVM_MIGRATION_VALID_STATUSES: |
| 1693 |
migration_status = objects.MigrationStatus(status=status) |
| 1694 |
match = self._MIGRATION_PROGRESS_RE.search(result.stdout)
|
| 1695 |
if match:
|
| 1696 |
migration_status.transferred_ram = match.group("transferred")
|
| 1697 |
migration_status.total_ram = match.group("total")
|
| 1698 |
|
| 1699 |
return migration_status
|
| 1700 |
|
| 1701 |
logging.warning("KVM: unknown migration status '%s'", status)
|
| 1702 |
|
| 1703 |
time.sleep(self._MIGRATION_INFO_RETRY_DELAY)
|
| 1704 |
|
| 1705 |
return objects.MigrationStatus(status=constants.HV_MIGRATION_FAILED,
|
| 1706 |
info="Too many 'info migrate' broken answers")
|
| 1707 |
|
| 1708 |
def GetNodeInfo(self): |
| 1709 |
"""Return information about the node.
|
| 1710 |
|
| 1711 |
@return: a dict with the following keys (values in MiB):
|
| 1712 |
- memory_total: the total memory size on the node
|
| 1713 |
- memory_free: the available memory on the node for instances
|
| 1714 |
- memory_dom0: the memory used by the node itself, if available
|
| 1715 |
- hv_version: the hypervisor version in the form (major, minor,
|
| 1716 |
revision)
|
| 1717 |
|
| 1718 |
"""
|
| 1719 |
result = self.GetLinuxNodeInfo()
|
| 1720 |
_, v_major, v_min, v_rev = self._GetKVMVersion()
|
| 1721 |
result[constants.HV_NODEINFO_KEY_VERSION] = (v_major, v_min, v_rev) |
| 1722 |
return result
|
| 1723 |
|
| 1724 |
@classmethod
|
| 1725 |
def GetInstanceConsole(cls, instance, hvparams, beparams): |
| 1726 |
"""Return a command for connecting to the console of an instance.
|
| 1727 |
|
| 1728 |
"""
|
| 1729 |
if hvparams[constants.HV_SERIAL_CONSOLE]:
|
| 1730 |
cmd = [constants.KVM_CONSOLE_WRAPPER, |
| 1731 |
constants.SOCAT_PATH, utils.ShellQuote(instance.name), |
| 1732 |
utils.ShellQuote(cls._InstanceMonitor(instance.name)), |
| 1733 |
"STDIO,%s" % cls._SocatUnixConsoleParams(),
|
| 1734 |
"UNIX-CONNECT:%s" % cls._InstanceSerial(instance.name)]
|
| 1735 |
return objects.InstanceConsole(instance=instance.name,
|
| 1736 |
kind=constants.CONS_SSH, |
| 1737 |
host=instance.primary_node, |
| 1738 |
user=constants.GANETI_RUNAS, |
| 1739 |
command=cmd) |
| 1740 |
|
| 1741 |
vnc_bind_address = hvparams[constants.HV_VNC_BIND_ADDRESS] |
| 1742 |
if vnc_bind_address and instance.network_port > constants.VNC_BASE_PORT: |
| 1743 |
display = instance.network_port - constants.VNC_BASE_PORT |
| 1744 |
return objects.InstanceConsole(instance=instance.name,
|
| 1745 |
kind=constants.CONS_VNC, |
| 1746 |
host=vnc_bind_address, |
| 1747 |
port=instance.network_port, |
| 1748 |
display=display) |
| 1749 |
|
| 1750 |
spice_bind = hvparams[constants.HV_KVM_SPICE_BIND] |
| 1751 |
if spice_bind:
|
| 1752 |
return objects.InstanceConsole(instance=instance.name,
|
| 1753 |
kind=constants.CONS_SPICE, |
| 1754 |
host=spice_bind, |
| 1755 |
port=instance.network_port) |
| 1756 |
|
| 1757 |
return objects.InstanceConsole(instance=instance.name,
|
| 1758 |
kind=constants.CONS_MESSAGE, |
| 1759 |
message=("No serial shell for instance %s" %
|
| 1760 |
instance.name)) |
| 1761 |
|
| 1762 |
def Verify(self): |
| 1763 |
"""Verify the hypervisor.
|
| 1764 |
|
| 1765 |
Check that the binary exists.
|
| 1766 |
|
| 1767 |
"""
|
| 1768 |
if not os.path.exists(constants.KVM_PATH): |
| 1769 |
return "The kvm binary ('%s') does not exist." % constants.KVM_PATH |
| 1770 |
if not os.path.exists(constants.SOCAT_PATH): |
| 1771 |
return "The socat binary ('%s') does not exist." % constants.SOCAT_PATH |
| 1772 |
|
| 1773 |
@classmethod
|
| 1774 |
def CheckParameterSyntax(cls, hvparams): |
| 1775 |
"""Check the given parameters for validity.
|
| 1776 |
|
| 1777 |
@type hvparams: dict
|
| 1778 |
@param hvparams: dictionary with parameter names/value
|
| 1779 |
@raise errors.HypervisorError: when a parameter is not valid
|
| 1780 |
|
| 1781 |
"""
|
| 1782 |
super(KVMHypervisor, cls).CheckParameterSyntax(hvparams)
|
| 1783 |
|
| 1784 |
kernel_path = hvparams[constants.HV_KERNEL_PATH] |
| 1785 |
if kernel_path:
|
| 1786 |
if not hvparams[constants.HV_ROOT_PATH]: |
| 1787 |
raise errors.HypervisorError("Need a root partition for the instance," |
| 1788 |
" if a kernel is defined")
|
| 1789 |
|
| 1790 |
if (hvparams[constants.HV_VNC_X509_VERIFY] and |
| 1791 |
not hvparams[constants.HV_VNC_X509]):
|
| 1792 |
raise errors.HypervisorError("%s must be defined, if %s is" % |
| 1793 |
(constants.HV_VNC_X509, |
| 1794 |
constants.HV_VNC_X509_VERIFY)) |
| 1795 |
|
| 1796 |
boot_order = hvparams[constants.HV_BOOT_ORDER] |
| 1797 |
if (boot_order == constants.HT_BO_CDROM and |
| 1798 |
not hvparams[constants.HV_CDROM_IMAGE_PATH]):
|
| 1799 |
raise errors.HypervisorError("Cannot boot from cdrom without an" |
| 1800 |
" ISO path")
|
| 1801 |
|
| 1802 |
security_model = hvparams[constants.HV_SECURITY_MODEL] |
| 1803 |
if security_model == constants.HT_SM_USER:
|
| 1804 |
if not hvparams[constants.HV_SECURITY_DOMAIN]: |
| 1805 |
raise errors.HypervisorError("A security domain (user to run kvm as)" |
| 1806 |
" must be specified")
|
| 1807 |
elif (security_model == constants.HT_SM_NONE or |
| 1808 |
security_model == constants.HT_SM_POOL): |
| 1809 |
if hvparams[constants.HV_SECURITY_DOMAIN]:
|
| 1810 |
raise errors.HypervisorError("Cannot have a security domain when the" |
| 1811 |
" security model is 'none' or 'pool'")
|
| 1812 |
|
| 1813 |
spice_bind = hvparams[constants.HV_KVM_SPICE_BIND] |
| 1814 |
spice_ip_version = hvparams[constants.HV_KVM_SPICE_IP_VERSION] |
| 1815 |
if spice_bind:
|
| 1816 |
if spice_ip_version != constants.IFACE_NO_IP_VERSION_SPECIFIED:
|
| 1817 |
# if an IP version is specified, the spice_bind parameter must be an
|
| 1818 |
# IP of that family
|
| 1819 |
if (netutils.IP4Address.IsValid(spice_bind) and |
| 1820 |
spice_ip_version != constants.IP4_VERSION): |
| 1821 |
raise errors.HypervisorError("spice: got an IPv4 address (%s), but" |
| 1822 |
" the specified IP version is %s" %
|
| 1823 |
(spice_bind, spice_ip_version)) |
| 1824 |
|
| 1825 |
if (netutils.IP6Address.IsValid(spice_bind) and |
| 1826 |
spice_ip_version != constants.IP6_VERSION): |
| 1827 |
raise errors.HypervisorError("spice: got an IPv6 address (%s), but" |
| 1828 |
" the specified IP version is %s" %
|
| 1829 |
(spice_bind, spice_ip_version)) |
| 1830 |
else:
|
| 1831 |
# All the other SPICE parameters depend on spice_bind being set. Raise an
|
| 1832 |
# error if any of them is set without it.
|
| 1833 |
spice_additional_params = frozenset([
|
| 1834 |
constants.HV_KVM_SPICE_IP_VERSION, |
| 1835 |
constants.HV_KVM_SPICE_PASSWORD_FILE, |
| 1836 |
constants.HV_KVM_SPICE_LOSSLESS_IMG_COMPR, |
| 1837 |
constants.HV_KVM_SPICE_JPEG_IMG_COMPR, |
| 1838 |
constants.HV_KVM_SPICE_ZLIB_GLZ_IMG_COMPR, |
| 1839 |
constants.HV_KVM_SPICE_STREAMING_VIDEO_DETECTION, |
| 1840 |
constants.HV_KVM_SPICE_USE_TLS, |
| 1841 |
]) |
| 1842 |
for param in spice_additional_params: |
| 1843 |
if hvparams[param]:
|
| 1844 |
raise errors.HypervisorError("spice: %s requires %s to be set" % |
| 1845 |
(param, constants.HV_KVM_SPICE_BIND)) |
| 1846 |
|
| 1847 |
@classmethod
|
| 1848 |
def ValidateParameters(cls, hvparams): |
| 1849 |
"""Check the given parameters for validity.
|
| 1850 |
|
| 1851 |
@type hvparams: dict
|
| 1852 |
@param hvparams: dictionary with parameter names/value
|
| 1853 |
@raise errors.HypervisorError: when a parameter is not valid
|
| 1854 |
|
| 1855 |
"""
|
| 1856 |
super(KVMHypervisor, cls).ValidateParameters(hvparams)
|
| 1857 |
|
| 1858 |
security_model = hvparams[constants.HV_SECURITY_MODEL] |
| 1859 |
if security_model == constants.HT_SM_USER:
|
| 1860 |
username = hvparams[constants.HV_SECURITY_DOMAIN] |
| 1861 |
try:
|
| 1862 |
pwd.getpwnam(username) |
| 1863 |
except KeyError: |
| 1864 |
raise errors.HypervisorError("Unknown security domain user %s" |
| 1865 |
% username) |
| 1866 |
|
| 1867 |
spice_bind = hvparams[constants.HV_KVM_SPICE_BIND] |
| 1868 |
if spice_bind:
|
| 1869 |
# only one of VNC and SPICE can be used currently.
|
| 1870 |
if hvparams[constants.HV_VNC_BIND_ADDRESS]:
|
| 1871 |
raise errors.HypervisorError("both SPICE and VNC are configured, but" |
| 1872 |
" only one of them can be used at a"
|
| 1873 |
" given time.")
|
| 1874 |
|
| 1875 |
# KVM version should be >= 0.14.0
|
| 1876 |
_, v_major, v_min, _ = cls._GetKVMVersion() |
| 1877 |
if (v_major, v_min) < (0, 14): |
| 1878 |
raise errors.HypervisorError("spice is configured, but it is not" |
| 1879 |
" available in versions of KVM < 0.14")
|
| 1880 |
|
| 1881 |
# if spice_bind is not an IP address, it must be a valid interface
|
| 1882 |
bound_to_addr = (netutils.IP4Address.IsValid(spice_bind) |
| 1883 |
or netutils.IP6Address.IsValid(spice_bind))
|
| 1884 |
if not bound_to_addr and not netutils.IsValidInterface(spice_bind): |
| 1885 |
raise errors.HypervisorError("spice: the %s parameter must be either" |
| 1886 |
" a valid IP address or interface name" %
|
| 1887 |
constants.HV_KVM_SPICE_BIND) |
| 1888 |
|
| 1889 |
@classmethod
|
| 1890 |
def PowercycleNode(cls): |
| 1891 |
"""KVM powercycle, just a wrapper over Linux powercycle.
|
| 1892 |
|
| 1893 |
"""
|
| 1894 |
cls.LinuxPowercycle() |