root / lib / hypervisor / hv_kvm.py @ 34fbc862
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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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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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# 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: |
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hv_base.ParamInSet(True, constants.HT_KVM_VALID_NIC_TYPES),
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constants.HV_DISK_TYPE: |
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hv_base.ParamInSet(True, constants.HT_KVM_VALID_DISK_TYPES),
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constants.HV_KVM_CDROM_DISK_TYPE: |
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hv_base.ParamInSet(False, constants.HT_KVM_VALID_DISK_TYPES),
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constants.HV_USB_MOUSE: |
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hv_base.ParamInSet(False, constants.HT_KVM_VALID_MOUSE_TYPES),
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constants.HV_KEYMAP: hv_base.NO_CHECK, |
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constants.HV_MIGRATION_PORT: hv_base.REQ_NET_PORT_CHECK, |
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constants.HV_MIGRATION_BANDWIDTH: hv_base.NO_CHECK, |
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constants.HV_MIGRATION_DOWNTIME: hv_base.NO_CHECK, |
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constants.HV_MIGRATION_MODE: hv_base.MIGRATION_MODE_CHECK, |
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constants.HV_USE_LOCALTIME: hv_base.NO_CHECK, |
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constants.HV_DISK_CACHE: |
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hv_base.ParamInSet(True, constants.HT_VALID_CACHE_TYPES),
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constants.HV_SECURITY_MODEL: |
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hv_base.ParamInSet(True, constants.HT_KVM_VALID_SM_TYPES),
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constants.HV_SECURITY_DOMAIN: hv_base.NO_CHECK, |
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constants.HV_KVM_FLAG: |
463 |
hv_base.ParamInSet(False, constants.HT_KVM_FLAG_VALUES),
|
464 |
constants.HV_VHOST_NET: hv_base.NO_CHECK, |
465 |
constants.HV_KVM_USE_CHROOT: hv_base.NO_CHECK, |
466 |
constants.HV_MEM_PATH: hv_base.OPT_DIR_CHECK, |
467 |
constants.HV_REBOOT_BEHAVIOR: |
468 |
hv_base.ParamInSet(True, constants.REBOOT_BEHAVIORS)
|
469 |
} |
470 |
|
471 |
_MIGRATION_STATUS_RE = re.compile("Migration\s+status:\s+(\w+)",
|
472 |
re.M | re.I) |
473 |
_MIGRATION_INFO_MAX_BAD_ANSWERS = 5
|
474 |
_MIGRATION_INFO_RETRY_DELAY = 2
|
475 |
|
476 |
_VERSION_RE = re.compile(r"\b(\d+)\.(\d+)\.(\d+)\b")
|
477 |
|
478 |
ANCILLARY_FILES = [ |
479 |
_KVM_NETWORK_SCRIPT, |
480 |
] |
481 |
|
482 |
def __init__(self): |
483 |
hv_base.BaseHypervisor.__init__(self)
|
484 |
# Let's make sure the directories we need exist, even if the RUN_DIR lives
|
485 |
# in a tmpfs filesystem or has been otherwise wiped out.
|
486 |
dirs = [(dname, constants.RUN_DIRS_MODE) for dname in self._DIRS] |
487 |
utils.EnsureDirs(dirs) |
488 |
|
489 |
@classmethod
|
490 |
def _InstancePidFile(cls, instance_name): |
491 |
"""Returns the instance pidfile.
|
492 |
|
493 |
"""
|
494 |
return utils.PathJoin(cls._PIDS_DIR, instance_name)
|
495 |
|
496 |
@classmethod
|
497 |
def _InstanceUidFile(cls, instance_name): |
498 |
"""Returns the instance uidfile.
|
499 |
|
500 |
"""
|
501 |
return utils.PathJoin(cls._UIDS_DIR, instance_name)
|
502 |
|
503 |
@classmethod
|
504 |
def _InstancePidInfo(cls, pid): |
505 |
"""Check pid file for instance information.
|
506 |
|
507 |
Check that a pid file is associated with an instance, and retrieve
|
508 |
information from its command line.
|
509 |
|
510 |
@type pid: string or int
|
511 |
@param pid: process id of the instance to check
|
512 |
@rtype: tuple
|
513 |
@return: (instance_name, memory, vcpus)
|
514 |
@raise errors.HypervisorError: when an instance cannot be found
|
515 |
|
516 |
"""
|
517 |
alive = utils.IsProcessAlive(pid) |
518 |
if not alive: |
519 |
raise errors.HypervisorError("Cannot get info for pid %s" % pid) |
520 |
|
521 |
cmdline_file = utils.PathJoin("/proc", str(pid), "cmdline") |
522 |
try:
|
523 |
cmdline = utils.ReadFile(cmdline_file) |
524 |
except EnvironmentError, err: |
525 |
raise errors.HypervisorError("Can't open cmdline file for pid %s: %s" % |
526 |
(pid, err)) |
527 |
|
528 |
instance = None
|
529 |
memory = 0
|
530 |
vcpus = 0
|
531 |
|
532 |
arg_list = cmdline.split("\x00")
|
533 |
while arg_list:
|
534 |
arg = arg_list.pop(0)
|
535 |
if arg == "-name": |
536 |
instance = arg_list.pop(0)
|
537 |
elif arg == "-m": |
538 |
memory = int(arg_list.pop(0)) |
539 |
elif arg == "-smp": |
540 |
vcpus = int(arg_list.pop(0)) |
541 |
|
542 |
if instance is None: |
543 |
raise errors.HypervisorError("Pid %s doesn't contain a ganeti kvm" |
544 |
" instance" % pid)
|
545 |
|
546 |
return (instance, memory, vcpus)
|
547 |
|
548 |
def _InstancePidAlive(self, instance_name): |
549 |
"""Returns the instance pidfile, pid, and liveness.
|
550 |
|
551 |
@type instance_name: string
|
552 |
@param instance_name: instance name
|
553 |
@rtype: tuple
|
554 |
@return: (pid file name, pid, liveness)
|
555 |
|
556 |
"""
|
557 |
pidfile = self._InstancePidFile(instance_name)
|
558 |
pid = utils.ReadPidFile(pidfile) |
559 |
|
560 |
alive = False
|
561 |
try:
|
562 |
cmd_instance = self._InstancePidInfo(pid)[0] |
563 |
alive = (cmd_instance == instance_name) |
564 |
except errors.HypervisorError:
|
565 |
pass
|
566 |
|
567 |
return (pidfile, pid, alive)
|
568 |
|
569 |
def _CheckDown(self, instance_name): |
570 |
"""Raises an error unless the given instance is down.
|
571 |
|
572 |
"""
|
573 |
alive = self._InstancePidAlive(instance_name)[2] |
574 |
if alive:
|
575 |
raise errors.HypervisorError("Failed to start instance %s: %s" % |
576 |
(instance_name, "already running"))
|
577 |
|
578 |
@classmethod
|
579 |
def _InstanceMonitor(cls, instance_name): |
580 |
"""Returns the instance monitor socket name
|
581 |
|
582 |
"""
|
583 |
return utils.PathJoin(cls._CTRL_DIR, "%s.monitor" % instance_name) |
584 |
|
585 |
@classmethod
|
586 |
def _InstanceSerial(cls, instance_name): |
587 |
"""Returns the instance serial socket name
|
588 |
|
589 |
"""
|
590 |
return utils.PathJoin(cls._CTRL_DIR, "%s.serial" % instance_name) |
591 |
|
592 |
@classmethod
|
593 |
def _InstanceQmpMonitor(cls, instance_name): |
594 |
"""Returns the instance serial QMP socket name
|
595 |
|
596 |
"""
|
597 |
return utils.PathJoin(cls._CTRL_DIR, "%s.qmp" % instance_name) |
598 |
|
599 |
@staticmethod
|
600 |
def _SocatUnixConsoleParams(): |
601 |
"""Returns the correct parameters for socat
|
602 |
|
603 |
If we have a new-enough socat we can use raw mode with an escape character.
|
604 |
|
605 |
"""
|
606 |
if constants.SOCAT_USE_ESCAPE:
|
607 |
return "raw,echo=0,escape=%s" % constants.SOCAT_ESCAPE_CODE |
608 |
else:
|
609 |
return "echo=0,icanon=0" |
610 |
|
611 |
@classmethod
|
612 |
def _InstanceKVMRuntime(cls, instance_name): |
613 |
"""Returns the instance KVM runtime filename
|
614 |
|
615 |
"""
|
616 |
return utils.PathJoin(cls._CONF_DIR, "%s.runtime" % instance_name) |
617 |
|
618 |
@classmethod
|
619 |
def _InstanceChrootDir(cls, instance_name): |
620 |
"""Returns the name of the KVM chroot dir of the instance
|
621 |
|
622 |
"""
|
623 |
return utils.PathJoin(cls._CHROOT_DIR, instance_name)
|
624 |
|
625 |
@classmethod
|
626 |
def _InstanceNICDir(cls, instance_name): |
627 |
"""Returns the name of the directory holding the tap device files for a
|
628 |
given instance.
|
629 |
|
630 |
"""
|
631 |
return utils.PathJoin(cls._NICS_DIR, instance_name)
|
632 |
|
633 |
@classmethod
|
634 |
def _InstanceNICFile(cls, instance_name, seq): |
635 |
"""Returns the name of the file containing the tap device for a given NIC
|
636 |
|
637 |
"""
|
638 |
return utils.PathJoin(cls._InstanceNICDir(instance_name), str(seq)) |
639 |
|
640 |
@classmethod
|
641 |
def _InstanceKeymapFile(cls, instance_name): |
642 |
"""Returns the name of the file containing the keymap for a given instance
|
643 |
|
644 |
"""
|
645 |
return utils.PathJoin(cls._KEYMAP_DIR, instance_name)
|
646 |
|
647 |
@classmethod
|
648 |
def _TryReadUidFile(cls, uid_file): |
649 |
"""Try to read a uid file
|
650 |
|
651 |
"""
|
652 |
if os.path.exists(uid_file):
|
653 |
try:
|
654 |
uid = int(utils.ReadOneLineFile(uid_file))
|
655 |
return uid
|
656 |
except EnvironmentError: |
657 |
logging.warning("Can't read uid file", exc_info=True) |
658 |
except (TypeError, ValueError): |
659 |
logging.warning("Can't parse uid file contents", exc_info=True) |
660 |
return None |
661 |
|
662 |
@classmethod
|
663 |
def _RemoveInstanceRuntimeFiles(cls, pidfile, instance_name): |
664 |
"""Removes an instance's rutime sockets/files/dirs.
|
665 |
|
666 |
"""
|
667 |
utils.RemoveFile(pidfile) |
668 |
utils.RemoveFile(cls._InstanceMonitor(instance_name)) |
669 |
utils.RemoveFile(cls._InstanceSerial(instance_name)) |
670 |
utils.RemoveFile(cls._InstanceQmpMonitor(instance_name)) |
671 |
utils.RemoveFile(cls._InstanceKVMRuntime(instance_name)) |
672 |
utils.RemoveFile(cls._InstanceKeymapFile(instance_name)) |
673 |
uid_file = cls._InstanceUidFile(instance_name) |
674 |
uid = cls._TryReadUidFile(uid_file) |
675 |
utils.RemoveFile(uid_file) |
676 |
if uid is not None: |
677 |
uidpool.ReleaseUid(uid) |
678 |
try:
|
679 |
shutil.rmtree(cls._InstanceNICDir(instance_name)) |
680 |
except OSError, err: |
681 |
if err.errno != errno.ENOENT:
|
682 |
raise
|
683 |
try:
|
684 |
chroot_dir = cls._InstanceChrootDir(instance_name) |
685 |
utils.RemoveDir(chroot_dir) |
686 |
except OSError, err: |
687 |
if err.errno == errno.ENOTEMPTY:
|
688 |
# The chroot directory is expected to be empty, but it isn't.
|
689 |
new_chroot_dir = tempfile.mkdtemp(dir=cls._CHROOT_QUARANTINE_DIR, |
690 |
prefix="%s-%s-" %
|
691 |
(instance_name, |
692 |
utils.TimestampForFilename())) |
693 |
logging.warning("The chroot directory of instance %s can not be"
|
694 |
" removed as it is not empty. Moving it to the"
|
695 |
" quarantine instead. Please investigate the"
|
696 |
" contents (%s) and clean up manually",
|
697 |
instance_name, new_chroot_dir) |
698 |
utils.RenameFile(chroot_dir, new_chroot_dir) |
699 |
else:
|
700 |
raise
|
701 |
|
702 |
@staticmethod
|
703 |
def _ConfigureNIC(instance, seq, nic, tap): |
704 |
"""Run the network configuration script for a specified NIC
|
705 |
|
706 |
@param instance: instance we're acting on
|
707 |
@type instance: instance object
|
708 |
@param seq: nic sequence number
|
709 |
@type seq: int
|
710 |
@param nic: nic we're acting on
|
711 |
@type nic: nic object
|
712 |
@param tap: the host's tap interface this NIC corresponds to
|
713 |
@type tap: str
|
714 |
|
715 |
"""
|
716 |
|
717 |
if instance.tags:
|
718 |
tags = " ".join(instance.tags)
|
719 |
else:
|
720 |
tags = ""
|
721 |
|
722 |
env = { |
723 |
"PATH": "%s:/sbin:/usr/sbin" % os.environ["PATH"], |
724 |
"INSTANCE": instance.name,
|
725 |
"MAC": nic.mac,
|
726 |
"MODE": nic.nicparams[constants.NIC_MODE],
|
727 |
"INTERFACE": tap,
|
728 |
"INTERFACE_INDEX": str(seq), |
729 |
"TAGS": tags,
|
730 |
} |
731 |
|
732 |
if nic.ip:
|
733 |
env["IP"] = nic.ip
|
734 |
|
735 |
if nic.nicparams[constants.NIC_LINK]:
|
736 |
env["LINK"] = nic.nicparams[constants.NIC_LINK]
|
737 |
|
738 |
if nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
|
739 |
env["BRIDGE"] = nic.nicparams[constants.NIC_LINK]
|
740 |
|
741 |
result = utils.RunCmd([constants.KVM_IFUP, tap], env=env) |
742 |
if result.failed:
|
743 |
raise errors.HypervisorError("Failed to configure interface %s: %s." |
744 |
" Network configuration script output: %s" %
|
745 |
(tap, result.fail_reason, result.output)) |
746 |
|
747 |
def ListInstances(self): |
748 |
"""Get the list of running instances.
|
749 |
|
750 |
We can do this by listing our live instances directory and
|
751 |
checking whether the associated kvm process is still alive.
|
752 |
|
753 |
"""
|
754 |
result = [] |
755 |
for name in os.listdir(self._PIDS_DIR): |
756 |
if self._InstancePidAlive(name)[2]: |
757 |
result.append(name) |
758 |
return result
|
759 |
|
760 |
def GetInstanceInfo(self, instance_name): |
761 |
"""Get instance properties.
|
762 |
|
763 |
@type instance_name: string
|
764 |
@param instance_name: the instance name
|
765 |
@rtype: tuple of strings
|
766 |
@return: (name, id, memory, vcpus, stat, times)
|
767 |
|
768 |
"""
|
769 |
_, pid, alive = self._InstancePidAlive(instance_name)
|
770 |
if not alive: |
771 |
return None |
772 |
|
773 |
_, memory, vcpus = self._InstancePidInfo(pid)
|
774 |
stat = "---b-"
|
775 |
times = "0"
|
776 |
|
777 |
return (instance_name, pid, memory, vcpus, stat, times)
|
778 |
|
779 |
def GetAllInstancesInfo(self): |
780 |
"""Get properties of all instances.
|
781 |
|
782 |
@return: list of tuples (name, id, memory, vcpus, stat, times)
|
783 |
|
784 |
"""
|
785 |
data = [] |
786 |
for name in os.listdir(self._PIDS_DIR): |
787 |
try:
|
788 |
info = self.GetInstanceInfo(name)
|
789 |
except errors.HypervisorError:
|
790 |
continue
|
791 |
if info:
|
792 |
data.append(info) |
793 |
return data
|
794 |
|
795 |
def _GenerateKVMRuntime(self, instance, block_devices, startup_paused): |
796 |
"""Generate KVM information to start an instance.
|
797 |
|
798 |
"""
|
799 |
# pylint: disable=R0914,R0915
|
800 |
_, v_major, v_min, _ = self._GetKVMVersion()
|
801 |
|
802 |
pidfile = self._InstancePidFile(instance.name)
|
803 |
kvm = constants.KVM_PATH |
804 |
kvm_cmd = [kvm] |
805 |
# used just by the vnc server, if enabled
|
806 |
kvm_cmd.extend(["-name", instance.name])
|
807 |
kvm_cmd.extend(["-m", instance.beparams[constants.BE_MEMORY]])
|
808 |
kvm_cmd.extend(["-smp", instance.beparams[constants.BE_VCPUS]])
|
809 |
kvm_cmd.extend(["-pidfile", pidfile])
|
810 |
kvm_cmd.extend(["-daemonize"])
|
811 |
if not instance.hvparams[constants.HV_ACPI]: |
812 |
kvm_cmd.extend(["-no-acpi"])
|
813 |
if startup_paused:
|
814 |
kvm_cmd.extend(["-S"])
|
815 |
if instance.hvparams[constants.HV_REBOOT_BEHAVIOR] == \
|
816 |
constants.INSTANCE_REBOOT_EXIT: |
817 |
kvm_cmd.extend(["-no-reboot"])
|
818 |
|
819 |
hvp = instance.hvparams |
820 |
boot_disk = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_DISK |
821 |
boot_cdrom = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_CDROM |
822 |
boot_floppy = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_FLOPPY |
823 |
boot_network = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_NETWORK |
824 |
|
825 |
self.ValidateParameters(hvp)
|
826 |
|
827 |
if hvp[constants.HV_KVM_FLAG] == constants.HT_KVM_ENABLED:
|
828 |
kvm_cmd.extend(["-enable-kvm"])
|
829 |
elif hvp[constants.HV_KVM_FLAG] == constants.HT_KVM_DISABLED:
|
830 |
kvm_cmd.extend(["-disable-kvm"])
|
831 |
|
832 |
if boot_network:
|
833 |
kvm_cmd.extend(["-boot", "n"]) |
834 |
|
835 |
disk_type = hvp[constants.HV_DISK_TYPE] |
836 |
if disk_type == constants.HT_DISK_PARAVIRTUAL:
|
837 |
if_val = ",if=virtio"
|
838 |
else:
|
839 |
if_val = ",if=%s" % disk_type
|
840 |
# Cache mode
|
841 |
disk_cache = hvp[constants.HV_DISK_CACHE] |
842 |
if instance.disk_template in constants.DTS_EXT_MIRROR: |
843 |
if disk_cache != "none": |
844 |
# TODO: make this a hard error, instead of a silent overwrite
|
845 |
logging.warning("KVM: overriding disk_cache setting '%s' with 'none'"
|
846 |
" to prevent shared storage corruption on migration",
|
847 |
disk_cache) |
848 |
cache_val = ",cache=none"
|
849 |
elif disk_cache != constants.HT_CACHE_DEFAULT:
|
850 |
cache_val = ",cache=%s" % disk_cache
|
851 |
else:
|
852 |
cache_val = ""
|
853 |
for cfdev, dev_path in block_devices: |
854 |
if cfdev.mode != constants.DISK_RDWR:
|
855 |
raise errors.HypervisorError("Instance has read-only disks which" |
856 |
" are not supported by KVM")
|
857 |
# TODO: handle FD_LOOP and FD_BLKTAP (?)
|
858 |
boot_val = ""
|
859 |
if boot_disk:
|
860 |
kvm_cmd.extend(["-boot", "c"]) |
861 |
boot_disk = False
|
862 |
if (v_major, v_min) < (0, 14) and disk_type != constants.HT_DISK_IDE: |
863 |
boot_val = ",boot=on"
|
864 |
|
865 |
drive_val = "file=%s,format=raw%s%s%s" % (dev_path, if_val, boot_val,
|
866 |
cache_val) |
867 |
kvm_cmd.extend(["-drive", drive_val])
|
868 |
|
869 |
#Now we can specify a different device type for CDROM devices.
|
870 |
cdrom_disk_type = hvp[constants.HV_KVM_CDROM_DISK_TYPE] |
871 |
if not cdrom_disk_type: |
872 |
cdrom_disk_type = disk_type |
873 |
|
874 |
iso_image = hvp[constants.HV_CDROM_IMAGE_PATH] |
875 |
if iso_image:
|
876 |
options = ",format=raw,media=cdrom"
|
877 |
if boot_cdrom:
|
878 |
kvm_cmd.extend(["-boot", "d"]) |
879 |
if cdrom_disk_type != constants.HT_DISK_IDE:
|
880 |
options = "%s,boot=on,if=%s" % (options, constants.HT_DISK_IDE)
|
881 |
else:
|
882 |
options = "%s,boot=on" % options
|
883 |
else:
|
884 |
if cdrom_disk_type == constants.HT_DISK_PARAVIRTUAL:
|
885 |
if_val = ",if=virtio"
|
886 |
else:
|
887 |
if_val = ",if=%s" % cdrom_disk_type
|
888 |
options = "%s%s" % (options, if_val)
|
889 |
drive_val = "file=%s%s" % (iso_image, options)
|
890 |
kvm_cmd.extend(["-drive", drive_val])
|
891 |
|
892 |
iso_image2 = hvp[constants.HV_KVM_CDROM2_IMAGE_PATH] |
893 |
if iso_image2:
|
894 |
options = ",format=raw,media=cdrom"
|
895 |
if cdrom_disk_type == constants.HT_DISK_PARAVIRTUAL:
|
896 |
if_val = ",if=virtio"
|
897 |
else:
|
898 |
if_val = ",if=%s" % cdrom_disk_type
|
899 |
options = "%s%s" % (options, if_val)
|
900 |
drive_val = "file=%s%s" % (iso_image2, options)
|
901 |
kvm_cmd.extend(["-drive", drive_val])
|
902 |
|
903 |
floppy_image = hvp[constants.HV_KVM_FLOPPY_IMAGE_PATH] |
904 |
if floppy_image:
|
905 |
options = ",format=raw,media=disk"
|
906 |
if boot_floppy:
|
907 |
kvm_cmd.extend(["-boot", "a"]) |
908 |
options = "%s,boot=on" % options
|
909 |
if_val = ",if=floppy"
|
910 |
options = "%s%s" % (options, if_val)
|
911 |
drive_val = "file=%s%s" % (floppy_image, options)
|
912 |
kvm_cmd.extend(["-drive", drive_val])
|
913 |
|
914 |
kernel_path = hvp[constants.HV_KERNEL_PATH] |
915 |
if kernel_path:
|
916 |
kvm_cmd.extend(["-kernel", kernel_path])
|
917 |
initrd_path = hvp[constants.HV_INITRD_PATH] |
918 |
if initrd_path:
|
919 |
kvm_cmd.extend(["-initrd", initrd_path])
|
920 |
root_append = ["root=%s" % hvp[constants.HV_ROOT_PATH],
|
921 |
hvp[constants.HV_KERNEL_ARGS]] |
922 |
if hvp[constants.HV_SERIAL_CONSOLE]:
|
923 |
root_append.append("console=ttyS0,38400")
|
924 |
kvm_cmd.extend(["-append", " ".join(root_append)]) |
925 |
|
926 |
mem_path = hvp[constants.HV_MEM_PATH] |
927 |
if mem_path:
|
928 |
kvm_cmd.extend(["-mem-path", mem_path, "-mem-prealloc"]) |
929 |
|
930 |
mouse_type = hvp[constants.HV_USB_MOUSE] |
931 |
vnc_bind_address = hvp[constants.HV_VNC_BIND_ADDRESS] |
932 |
|
933 |
if mouse_type:
|
934 |
kvm_cmd.extend(["-usb"])
|
935 |
kvm_cmd.extend(["-usbdevice", mouse_type])
|
936 |
elif vnc_bind_address:
|
937 |
kvm_cmd.extend(["-usbdevice", constants.HT_MOUSE_TABLET])
|
938 |
|
939 |
keymap = hvp[constants.HV_KEYMAP] |
940 |
if keymap:
|
941 |
keymap_path = self._InstanceKeymapFile(instance.name)
|
942 |
# If a keymap file is specified, KVM won't use its internal defaults. By
|
943 |
# first including the "en-us" layout, an error on loading the actual
|
944 |
# layout (e.g. because it can't be found) won't lead to a non-functional
|
945 |
# keyboard. A keyboard with incorrect keys is still better than none.
|
946 |
utils.WriteFile(keymap_path, data="include en-us\ninclude %s\n" % keymap)
|
947 |
kvm_cmd.extend(["-k", keymap_path])
|
948 |
|
949 |
if vnc_bind_address:
|
950 |
if netutils.IP4Address.IsValid(vnc_bind_address):
|
951 |
if instance.network_port > constants.VNC_BASE_PORT:
|
952 |
display = instance.network_port - constants.VNC_BASE_PORT |
953 |
if vnc_bind_address == constants.IP4_ADDRESS_ANY:
|
954 |
vnc_arg = ":%d" % (display)
|
955 |
else:
|
956 |
vnc_arg = "%s:%d" % (vnc_bind_address, display)
|
957 |
else:
|
958 |
logging.error("Network port is not a valid VNC display (%d < %d)."
|
959 |
" Not starting VNC", instance.network_port,
|
960 |
constants.VNC_BASE_PORT) |
961 |
vnc_arg = "none"
|
962 |
|
963 |
# Only allow tls and other option when not binding to a file, for now.
|
964 |
# kvm/qemu gets confused otherwise about the filename to use.
|
965 |
vnc_append = ""
|
966 |
if hvp[constants.HV_VNC_TLS]:
|
967 |
vnc_append = "%s,tls" % vnc_append
|
968 |
if hvp[constants.HV_VNC_X509_VERIFY]:
|
969 |
vnc_append = "%s,x509verify=%s" % (vnc_append,
|
970 |
hvp[constants.HV_VNC_X509]) |
971 |
elif hvp[constants.HV_VNC_X509]:
|
972 |
vnc_append = "%s,x509=%s" % (vnc_append,
|
973 |
hvp[constants.HV_VNC_X509]) |
974 |
if hvp[constants.HV_VNC_PASSWORD_FILE]:
|
975 |
vnc_append = "%s,password" % vnc_append
|
976 |
|
977 |
vnc_arg = "%s%s" % (vnc_arg, vnc_append)
|
978 |
|
979 |
else:
|
980 |
vnc_arg = "unix:%s/%s.vnc" % (vnc_bind_address, instance.name)
|
981 |
|
982 |
kvm_cmd.extend(["-vnc", vnc_arg])
|
983 |
else:
|
984 |
kvm_cmd.extend(["-nographic"])
|
985 |
|
986 |
monitor_dev = ("unix:%s,server,nowait" %
|
987 |
self._InstanceMonitor(instance.name))
|
988 |
kvm_cmd.extend(["-monitor", monitor_dev])
|
989 |
if hvp[constants.HV_SERIAL_CONSOLE]:
|
990 |
serial_dev = ("unix:%s,server,nowait" %
|
991 |
self._InstanceSerial(instance.name))
|
992 |
kvm_cmd.extend(["-serial", serial_dev])
|
993 |
else:
|
994 |
kvm_cmd.extend(["-serial", "none"]) |
995 |
|
996 |
spice_bind = hvp[constants.HV_KVM_SPICE_BIND] |
997 |
spice_ip_version = None
|
998 |
if spice_bind:
|
999 |
if netutils.IsValidInterface(spice_bind):
|
1000 |
# The user specified a network interface, we have to figure out the IP
|
1001 |
# address.
|
1002 |
addresses = netutils.GetInterfaceIpAddresses(spice_bind) |
1003 |
spice_ip_version = hvp[constants.HV_KVM_SPICE_IP_VERSION] |
1004 |
|
1005 |
# if the user specified an IP version and the interface does not
|
1006 |
# have that kind of IP addresses, throw an exception
|
1007 |
if spice_ip_version != constants.IFACE_NO_IP_VERSION_SPECIFIED:
|
1008 |
if not addresses[spice_ip_version]: |
1009 |
raise errors.HypervisorError("spice: unable to get an IPv%s address" |
1010 |
" for %s" % (spice_ip_version,
|
1011 |
spice_bind)) |
1012 |
|
1013 |
# the user did not specify an IP version, we have to figure it out
|
1014 |
elif (addresses[constants.IP4_VERSION] and |
1015 |
addresses[constants.IP6_VERSION]): |
1016 |
# we have both ipv4 and ipv6, let's use the cluster default IP
|
1017 |
# version
|
1018 |
cluster_family = ssconf.SimpleStore().GetPrimaryIPFamily() |
1019 |
spice_ip_version = netutils.IPAddress.GetVersionFromAddressFamily( |
1020 |
cluster_family) |
1021 |
elif addresses[constants.IP4_VERSION]:
|
1022 |
spice_ip_version = constants.IP4_VERSION |
1023 |
elif addresses[constants.IP6_VERSION]:
|
1024 |
spice_ip_version = constants.IP6_VERSION |
1025 |
else:
|
1026 |
raise errors.HypervisorError("spice: unable to get an IP address" |
1027 |
" for %s" % (spice_bind))
|
1028 |
|
1029 |
spice_address = addresses[spice_ip_version][0]
|
1030 |
|
1031 |
else:
|
1032 |
# spice_bind is known to be a valid IP address, because
|
1033 |
# ValidateParameters checked it.
|
1034 |
spice_address = spice_bind |
1035 |
|
1036 |
spice_arg = "addr=%s" % spice_address
|
1037 |
if hvp[constants.HV_KVM_SPICE_USE_TLS]:
|
1038 |
spice_arg = "%s,tls-port=%s,x509-cacert-file=%s" % (spice_arg,
|
1039 |
instance.network_port, constants.SPICE_CACERT_FILE) |
1040 |
spice_arg = "%s,x509-key-file=%s,x509-cert-file=%s" % (spice_arg,
|
1041 |
constants.SPICE_CERT_FILE, constants.SPICE_CERT_FILE) |
1042 |
tls_ciphers = hvp[constants.HV_KVM_SPICE_TLS_CIPHERS] |
1043 |
if tls_ciphers:
|
1044 |
spice_arg = "%s,tls-ciphers=%s" % (spice_arg, tls_ciphers)
|
1045 |
else:
|
1046 |
spice_arg = "%s,port=%s" % (spice_arg, instance.network_port)
|
1047 |
|
1048 |
if not hvp[constants.HV_KVM_SPICE_PASSWORD_FILE]: |
1049 |
spice_arg = "%s,disable-ticketing" % spice_arg
|
1050 |
|
1051 |
if spice_ip_version:
|
1052 |
spice_arg = "%s,ipv%s" % (spice_arg, spice_ip_version)
|
1053 |
|
1054 |
# Image compression options
|
1055 |
img_lossless = hvp[constants.HV_KVM_SPICE_LOSSLESS_IMG_COMPR] |
1056 |
img_jpeg = hvp[constants.HV_KVM_SPICE_JPEG_IMG_COMPR] |
1057 |
img_zlib_glz = hvp[constants.HV_KVM_SPICE_ZLIB_GLZ_IMG_COMPR] |
1058 |
if img_lossless:
|
1059 |
spice_arg = "%s,image-compression=%s" % (spice_arg, img_lossless)
|
1060 |
if img_jpeg:
|
1061 |
spice_arg = "%s,jpeg-wan-compression=%s" % (spice_arg, img_jpeg)
|
1062 |
if img_zlib_glz:
|
1063 |
spice_arg = "%s,zlib-glz-wan-compression=%s" % (spice_arg, img_zlib_glz)
|
1064 |
|
1065 |
# Video stream detection
|
1066 |
video_streaming = hvp[constants.HV_KVM_SPICE_STREAMING_VIDEO_DETECTION] |
1067 |
if video_streaming:
|
1068 |
spice_arg = "%s,streaming-video=%s" % (spice_arg, video_streaming)
|
1069 |
|
1070 |
# Audio compression, by default in qemu-kvm it is on
|
1071 |
if not hvp[constants.HV_KVM_SPICE_AUDIO_COMPR]: |
1072 |
spice_arg = "%s,playback-compression=off" % spice_arg
|
1073 |
if not hvp[constants.HV_KVM_SPICE_USE_VDAGENT]: |
1074 |
spice_arg = "%s,agent-mouse=off" % spice_arg
|
1075 |
|
1076 |
logging.info("KVM: SPICE will listen on port %s", instance.network_port)
|
1077 |
kvm_cmd.extend(["-spice", spice_arg])
|
1078 |
|
1079 |
# Tell kvm to use the paravirtualized graphic card, optimized for SPICE
|
1080 |
kvm_cmd.extend(["-vga", "qxl"]) |
1081 |
|
1082 |
if hvp[constants.HV_USE_LOCALTIME]:
|
1083 |
kvm_cmd.extend(["-localtime"])
|
1084 |
|
1085 |
if hvp[constants.HV_KVM_USE_CHROOT]:
|
1086 |
kvm_cmd.extend(["-chroot", self._InstanceChrootDir(instance.name)]) |
1087 |
|
1088 |
# Save the current instance nics, but defer their expansion as parameters,
|
1089 |
# as we'll need to generate executable temp files for them.
|
1090 |
kvm_nics = instance.nics |
1091 |
hvparams = hvp |
1092 |
|
1093 |
return (kvm_cmd, kvm_nics, hvparams)
|
1094 |
|
1095 |
def _WriteKVMRuntime(self, instance_name, data): |
1096 |
"""Write an instance's KVM runtime
|
1097 |
|
1098 |
"""
|
1099 |
try:
|
1100 |
utils.WriteFile(self._InstanceKVMRuntime(instance_name),
|
1101 |
data=data) |
1102 |
except EnvironmentError, err: |
1103 |
raise errors.HypervisorError("Failed to save KVM runtime file: %s" % err) |
1104 |
|
1105 |
def _ReadKVMRuntime(self, instance_name): |
1106 |
"""Read an instance's KVM runtime
|
1107 |
|
1108 |
"""
|
1109 |
try:
|
1110 |
file_content = utils.ReadFile(self._InstanceKVMRuntime(instance_name))
|
1111 |
except EnvironmentError, err: |
1112 |
raise errors.HypervisorError("Failed to load KVM runtime file: %s" % err) |
1113 |
return file_content
|
1114 |
|
1115 |
def _SaveKVMRuntime(self, instance, kvm_runtime): |
1116 |
"""Save an instance's KVM runtime
|
1117 |
|
1118 |
"""
|
1119 |
kvm_cmd, kvm_nics, hvparams = kvm_runtime |
1120 |
serialized_nics = [nic.ToDict() for nic in kvm_nics] |
1121 |
serialized_form = serializer.Dump((kvm_cmd, serialized_nics, hvparams)) |
1122 |
self._WriteKVMRuntime(instance.name, serialized_form)
|
1123 |
|
1124 |
def _LoadKVMRuntime(self, instance, serialized_runtime=None): |
1125 |
"""Load an instance's KVM runtime
|
1126 |
|
1127 |
"""
|
1128 |
if not serialized_runtime: |
1129 |
serialized_runtime = self._ReadKVMRuntime(instance.name)
|
1130 |
loaded_runtime = serializer.Load(serialized_runtime) |
1131 |
kvm_cmd, serialized_nics, hvparams = loaded_runtime |
1132 |
kvm_nics = [objects.NIC.FromDict(snic) for snic in serialized_nics] |
1133 |
return (kvm_cmd, kvm_nics, hvparams)
|
1134 |
|
1135 |
def _RunKVMCmd(self, name, kvm_cmd, tap_fds=None): |
1136 |
"""Run the KVM cmd and check for errors
|
1137 |
|
1138 |
@type name: string
|
1139 |
@param name: instance name
|
1140 |
@type kvm_cmd: list of strings
|
1141 |
@param kvm_cmd: runcmd input for kvm
|
1142 |
@type tap_fds: list of int
|
1143 |
@param tap_fds: fds of tap devices opened by Ganeti
|
1144 |
|
1145 |
"""
|
1146 |
try:
|
1147 |
result = utils.RunCmd(kvm_cmd, noclose_fds=tap_fds) |
1148 |
finally:
|
1149 |
for fd in tap_fds: |
1150 |
utils_wrapper.CloseFdNoError(fd) |
1151 |
|
1152 |
if result.failed:
|
1153 |
raise errors.HypervisorError("Failed to start instance %s: %s (%s)" % |
1154 |
(name, result.fail_reason, result.output)) |
1155 |
if not self._InstancePidAlive(name)[2]: |
1156 |
raise errors.HypervisorError("Failed to start instance %s" % name) |
1157 |
|
1158 |
def _ExecuteKVMRuntime(self, instance, kvm_runtime, incoming=None): |
1159 |
"""Execute a KVM cmd, after completing it with some last minute data
|
1160 |
|
1161 |
@type incoming: tuple of strings
|
1162 |
@param incoming: (target_host_ip, port)
|
1163 |
|
1164 |
"""
|
1165 |
# Small _ExecuteKVMRuntime hv parameters programming howto:
|
1166 |
# - conf_hvp contains the parameters as configured on ganeti. they might
|
1167 |
# have changed since the instance started; only use them if the change
|
1168 |
# won't affect the inside of the instance (which hasn't been rebooted).
|
1169 |
# - up_hvp contains the parameters as they were when the instance was
|
1170 |
# started, plus any new parameter which has been added between ganeti
|
1171 |
# versions: it is paramount that those default to a value which won't
|
1172 |
# affect the inside of the instance as well.
|
1173 |
conf_hvp = instance.hvparams |
1174 |
name = instance.name |
1175 |
self._CheckDown(name)
|
1176 |
|
1177 |
temp_files = [] |
1178 |
|
1179 |
kvm_cmd, kvm_nics, up_hvp = kvm_runtime |
1180 |
up_hvp = objects.FillDict(conf_hvp, up_hvp) |
1181 |
|
1182 |
_, v_major, v_min, _ = self._GetKVMVersion()
|
1183 |
|
1184 |
# We know it's safe to run as a different user upon migration, so we'll use
|
1185 |
# the latest conf, from conf_hvp.
|
1186 |
security_model = conf_hvp[constants.HV_SECURITY_MODEL] |
1187 |
if security_model == constants.HT_SM_USER:
|
1188 |
kvm_cmd.extend(["-runas", conf_hvp[constants.HV_SECURITY_DOMAIN]])
|
1189 |
|
1190 |
# We have reasons to believe changing something like the nic driver/type
|
1191 |
# upon migration won't exactly fly with the instance kernel, so for nic
|
1192 |
# related parameters we'll use up_hvp
|
1193 |
tapfds = [] |
1194 |
taps = [] |
1195 |
if not kvm_nics: |
1196 |
kvm_cmd.extend(["-net", "none"]) |
1197 |
else:
|
1198 |
vnet_hdr = False
|
1199 |
tap_extra = ""
|
1200 |
nic_type = up_hvp[constants.HV_NIC_TYPE] |
1201 |
if nic_type == constants.HT_NIC_PARAVIRTUAL:
|
1202 |
# From version 0.12.0, kvm uses a new sintax for network configuration.
|
1203 |
if (v_major, v_min) >= (0, 12): |
1204 |
nic_model = "virtio-net-pci"
|
1205 |
vnet_hdr = True
|
1206 |
else:
|
1207 |
nic_model = "virtio"
|
1208 |
|
1209 |
if up_hvp[constants.HV_VHOST_NET]:
|
1210 |
# vhost_net is only available from version 0.13.0 or newer
|
1211 |
if (v_major, v_min) >= (0, 13): |
1212 |
tap_extra = ",vhost=on"
|
1213 |
else:
|
1214 |
raise errors.HypervisorError("vhost_net is configured" |
1215 |
" but it is not available")
|
1216 |
else:
|
1217 |
nic_model = nic_type |
1218 |
|
1219 |
for nic_seq, nic in enumerate(kvm_nics): |
1220 |
tapname, tapfd = _OpenTap(vnet_hdr) |
1221 |
tapfds.append(tapfd) |
1222 |
taps.append(tapname) |
1223 |
if (v_major, v_min) >= (0, 12): |
1224 |
nic_val = "%s,mac=%s,netdev=netdev%s" % (nic_model, nic.mac, nic_seq)
|
1225 |
tap_val = "type=tap,id=netdev%s,fd=%d%s" % (nic_seq, tapfd, tap_extra)
|
1226 |
kvm_cmd.extend(["-netdev", tap_val, "-device", nic_val]) |
1227 |
else:
|
1228 |
nic_val = "nic,vlan=%s,macaddr=%s,model=%s" % (nic_seq,
|
1229 |
nic.mac, nic_model) |
1230 |
tap_val = "tap,vlan=%s,fd=%d" % (nic_seq, tapfd)
|
1231 |
kvm_cmd.extend(["-net", tap_val, "-net", nic_val]) |
1232 |
|
1233 |
if incoming:
|
1234 |
target, port = incoming |
1235 |
kvm_cmd.extend(["-incoming", "tcp:%s:%s" % (target, port)]) |
1236 |
|
1237 |
# Changing the vnc password doesn't bother the guest that much. At most it
|
1238 |
# will surprise people who connect to it. Whether positively or negatively
|
1239 |
# it's debatable.
|
1240 |
vnc_pwd_file = conf_hvp[constants.HV_VNC_PASSWORD_FILE] |
1241 |
vnc_pwd = None
|
1242 |
if vnc_pwd_file:
|
1243 |
try:
|
1244 |
vnc_pwd = utils.ReadOneLineFile(vnc_pwd_file, strict=True)
|
1245 |
except EnvironmentError, err: |
1246 |
raise errors.HypervisorError("Failed to open VNC password file %s: %s" |
1247 |
% (vnc_pwd_file, err)) |
1248 |
|
1249 |
if conf_hvp[constants.HV_KVM_USE_CHROOT]:
|
1250 |
utils.EnsureDirs([(self._InstanceChrootDir(name),
|
1251 |
constants.SECURE_DIR_MODE)]) |
1252 |
|
1253 |
# Automatically enable QMP if version is >= 0.14
|
1254 |
if (v_major, v_min) >= (0, 14): |
1255 |
logging.debug("Enabling QMP")
|
1256 |
kvm_cmd.extend(["-qmp", "unix:%s,server,nowait" % |
1257 |
self._InstanceQmpMonitor(instance.name)])
|
1258 |
|
1259 |
# Configure the network now for starting instances and bridged interfaces,
|
1260 |
# during FinalizeMigration for incoming instances' routed interfaces
|
1261 |
for nic_seq, nic in enumerate(kvm_nics): |
1262 |
if (incoming and |
1263 |
nic.nicparams[constants.NIC_MODE] != constants.NIC_MODE_BRIDGED): |
1264 |
continue
|
1265 |
self._ConfigureNIC(instance, nic_seq, nic, taps[nic_seq])
|
1266 |
|
1267 |
if security_model == constants.HT_SM_POOL:
|
1268 |
ss = ssconf.SimpleStore() |
1269 |
uid_pool = uidpool.ParseUidPool(ss.GetUidPool(), separator="\n")
|
1270 |
all_uids = set(uidpool.ExpandUidPool(uid_pool))
|
1271 |
uid = uidpool.RequestUnusedUid(all_uids) |
1272 |
try:
|
1273 |
username = pwd.getpwuid(uid.GetUid()).pw_name |
1274 |
kvm_cmd.extend(["-runas", username])
|
1275 |
self._RunKVMCmd(name, kvm_cmd, tapfds)
|
1276 |
except:
|
1277 |
uidpool.ReleaseUid(uid) |
1278 |
raise
|
1279 |
else:
|
1280 |
uid.Unlock() |
1281 |
utils.WriteFile(self._InstanceUidFile(name), data=uid.AsStr())
|
1282 |
else:
|
1283 |
self._RunKVMCmd(name, kvm_cmd, tapfds)
|
1284 |
|
1285 |
utils.EnsureDirs([(self._InstanceNICDir(instance.name),
|
1286 |
constants.RUN_DIRS_MODE)]) |
1287 |
for nic_seq, tap in enumerate(taps): |
1288 |
utils.WriteFile(self._InstanceNICFile(instance.name, nic_seq),
|
1289 |
data=tap) |
1290 |
|
1291 |
if vnc_pwd:
|
1292 |
change_cmd = "change vnc password %s" % vnc_pwd
|
1293 |
self._CallMonitorCommand(instance.name, change_cmd)
|
1294 |
|
1295 |
# Setting SPICE password. We are not vulnerable to malicious passwordless
|
1296 |
# connection attempts because SPICE by default does not allow connections
|
1297 |
# if neither a password nor the "disable_ticketing" options are specified.
|
1298 |
# As soon as we send the password via QMP, that password is a valid ticket
|
1299 |
# for connection.
|
1300 |
spice_password_file = conf_hvp[constants.HV_KVM_SPICE_PASSWORD_FILE] |
1301 |
if spice_password_file:
|
1302 |
try:
|
1303 |
spice_pwd = utils.ReadOneLineFile(spice_password_file, strict=True)
|
1304 |
qmp = QmpConnection(self._InstanceQmpMonitor(instance.name))
|
1305 |
qmp.connect() |
1306 |
arguments = { |
1307 |
"protocol": "spice", |
1308 |
"password": spice_pwd,
|
1309 |
} |
1310 |
qmp.Execute("set_password", arguments)
|
1311 |
except EnvironmentError, err: |
1312 |
raise errors.HypervisorError("Failed to open SPICE password file %s: %s" |
1313 |
% (spice_password_file, err)) |
1314 |
|
1315 |
for filename in temp_files: |
1316 |
utils.RemoveFile(filename) |
1317 |
|
1318 |
def StartInstance(self, instance, block_devices, startup_paused): |
1319 |
"""Start an instance.
|
1320 |
|
1321 |
"""
|
1322 |
self._CheckDown(instance.name)
|
1323 |
kvm_runtime = self._GenerateKVMRuntime(instance, block_devices,
|
1324 |
startup_paused) |
1325 |
self._SaveKVMRuntime(instance, kvm_runtime)
|
1326 |
self._ExecuteKVMRuntime(instance, kvm_runtime)
|
1327 |
|
1328 |
def _CallMonitorCommand(self, instance_name, command): |
1329 |
"""Invoke a command on the instance monitor.
|
1330 |
|
1331 |
"""
|
1332 |
socat = ("echo %s | %s STDIO UNIX-CONNECT:%s" %
|
1333 |
(utils.ShellQuote(command), |
1334 |
constants.SOCAT_PATH, |
1335 |
utils.ShellQuote(self._InstanceMonitor(instance_name))))
|
1336 |
result = utils.RunCmd(socat) |
1337 |
if result.failed:
|
1338 |
msg = ("Failed to send command '%s' to instance %s."
|
1339 |
" output: %s, error: %s, fail_reason: %s" %
|
1340 |
(command, instance_name, |
1341 |
result.stdout, result.stderr, result.fail_reason)) |
1342 |
raise errors.HypervisorError(msg)
|
1343 |
|
1344 |
return result
|
1345 |
|
1346 |
@classmethod
|
1347 |
def _GetKVMVersion(cls): |
1348 |
"""Return the installed KVM version.
|
1349 |
|
1350 |
@return: (version, v_maj, v_min, v_rev)
|
1351 |
@raise L{errors.HypervisorError}: when the KVM version cannot be retrieved
|
1352 |
|
1353 |
"""
|
1354 |
result = utils.RunCmd([constants.KVM_PATH, "--help"])
|
1355 |
if result.failed:
|
1356 |
raise errors.HypervisorError("Unable to get KVM version") |
1357 |
match = cls._VERSION_RE.search(result.output.splitlines()[0])
|
1358 |
if not match: |
1359 |
raise errors.HypervisorError("Unable to get KVM version") |
1360 |
|
1361 |
return (match.group(0), int(match.group(1)), int(match.group(2)), |
1362 |
int(match.group(3))) |
1363 |
|
1364 |
def StopInstance(self, instance, force=False, retry=False, name=None): |
1365 |
"""Stop an instance.
|
1366 |
|
1367 |
"""
|
1368 |
if name is not None and not force: |
1369 |
raise errors.HypervisorError("Cannot shutdown cleanly by name only") |
1370 |
if name is None: |
1371 |
name = instance.name |
1372 |
acpi = instance.hvparams[constants.HV_ACPI] |
1373 |
else:
|
1374 |
acpi = False
|
1375 |
_, pid, alive = self._InstancePidAlive(name)
|
1376 |
if pid > 0 and alive: |
1377 |
if force or not acpi: |
1378 |
utils.KillProcess(pid) |
1379 |
else:
|
1380 |
self._CallMonitorCommand(name, "system_powerdown") |
1381 |
|
1382 |
def CleanupInstance(self, instance_name): |
1383 |
"""Cleanup after a stopped instance
|
1384 |
|
1385 |
"""
|
1386 |
pidfile, pid, alive = self._InstancePidAlive(instance_name)
|
1387 |
if pid > 0 and alive: |
1388 |
raise errors.HypervisorError("Cannot cleanup a live instance") |
1389 |
self._RemoveInstanceRuntimeFiles(pidfile, instance_name)
|
1390 |
|
1391 |
def RebootInstance(self, instance): |
1392 |
"""Reboot an instance.
|
1393 |
|
1394 |
"""
|
1395 |
# For some reason if we do a 'send-key ctrl-alt-delete' to the control
|
1396 |
# socket the instance will stop, but now power up again. So we'll resort
|
1397 |
# to shutdown and restart.
|
1398 |
_, _, alive = self._InstancePidAlive(instance.name)
|
1399 |
if not alive: |
1400 |
raise errors.HypervisorError("Failed to reboot instance %s:" |
1401 |
" not running" % instance.name)
|
1402 |
# StopInstance will delete the saved KVM runtime so:
|
1403 |
# ...first load it...
|
1404 |
kvm_runtime = self._LoadKVMRuntime(instance)
|
1405 |
# ...now we can safely call StopInstance...
|
1406 |
if not self.StopInstance(instance): |
1407 |
self.StopInstance(instance, force=True) |
1408 |
# ...and finally we can save it again, and execute it...
|
1409 |
self._SaveKVMRuntime(instance, kvm_runtime)
|
1410 |
self._ExecuteKVMRuntime(instance, kvm_runtime)
|
1411 |
|
1412 |
def MigrationInfo(self, instance): |
1413 |
"""Get instance information to perform a migration.
|
1414 |
|
1415 |
@type instance: L{objects.Instance}
|
1416 |
@param instance: instance to be migrated
|
1417 |
@rtype: string
|
1418 |
@return: content of the KVM runtime file
|
1419 |
|
1420 |
"""
|
1421 |
return self._ReadKVMRuntime(instance.name) |
1422 |
|
1423 |
def AcceptInstance(self, instance, info, target): |
1424 |
"""Prepare to accept an instance.
|
1425 |
|
1426 |
@type instance: L{objects.Instance}
|
1427 |
@param instance: instance to be accepted
|
1428 |
@type info: string
|
1429 |
@param info: content of the KVM runtime file on the source node
|
1430 |
@type target: string
|
1431 |
@param target: target host (usually ip), on this node
|
1432 |
|
1433 |
"""
|
1434 |
kvm_runtime = self._LoadKVMRuntime(instance, serialized_runtime=info)
|
1435 |
incoming_address = (target, instance.hvparams[constants.HV_MIGRATION_PORT]) |
1436 |
self._ExecuteKVMRuntime(instance, kvm_runtime, incoming=incoming_address)
|
1437 |
|
1438 |
def FinalizeMigration(self, instance, info, success): |
1439 |
"""Finalize an instance migration.
|
1440 |
|
1441 |
Stop the incoming mode KVM.
|
1442 |
|
1443 |
@type instance: L{objects.Instance}
|
1444 |
@param instance: instance whose migration is being finalized
|
1445 |
|
1446 |
"""
|
1447 |
if success:
|
1448 |
kvm_runtime = self._LoadKVMRuntime(instance, serialized_runtime=info)
|
1449 |
kvm_nics = kvm_runtime[1]
|
1450 |
|
1451 |
for nic_seq, nic in enumerate(kvm_nics): |
1452 |
if nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
|
1453 |
# Bridged interfaces have already been configured
|
1454 |
continue
|
1455 |
try:
|
1456 |
tap = utils.ReadFile(self._InstanceNICFile(instance.name, nic_seq))
|
1457 |
except EnvironmentError, err: |
1458 |
logging.warning("Failed to find host interface for %s NIC #%d: %s",
|
1459 |
instance.name, nic_seq, str(err))
|
1460 |
continue
|
1461 |
try:
|
1462 |
self._ConfigureNIC(instance, nic_seq, nic, tap)
|
1463 |
except errors.HypervisorError, err:
|
1464 |
logging.warning(str(err))
|
1465 |
|
1466 |
self._WriteKVMRuntime(instance.name, info)
|
1467 |
else:
|
1468 |
self.StopInstance(instance, force=True) |
1469 |
|
1470 |
def MigrateInstance(self, instance, target, live): |
1471 |
"""Migrate an instance to a target node.
|
1472 |
|
1473 |
The migration will not be attempted if the instance is not
|
1474 |
currently running.
|
1475 |
|
1476 |
@type instance: L{objects.Instance}
|
1477 |
@param instance: the instance to be migrated
|
1478 |
@type target: string
|
1479 |
@param target: ip address of the target node
|
1480 |
@type live: boolean
|
1481 |
@param live: perform a live migration
|
1482 |
|
1483 |
"""
|
1484 |
instance_name = instance.name |
1485 |
port = instance.hvparams[constants.HV_MIGRATION_PORT] |
1486 |
pidfile, pid, alive = self._InstancePidAlive(instance_name)
|
1487 |
if not alive: |
1488 |
raise errors.HypervisorError("Instance not running, cannot migrate") |
1489 |
|
1490 |
if not live: |
1491 |
self._CallMonitorCommand(instance_name, "stop") |
1492 |
|
1493 |
migrate_command = ("migrate_set_speed %dm" %
|
1494 |
instance.hvparams[constants.HV_MIGRATION_BANDWIDTH]) |
1495 |
self._CallMonitorCommand(instance_name, migrate_command)
|
1496 |
|
1497 |
migrate_command = ("migrate_set_downtime %dms" %
|
1498 |
instance.hvparams[constants.HV_MIGRATION_DOWNTIME]) |
1499 |
self._CallMonitorCommand(instance_name, migrate_command)
|
1500 |
|
1501 |
migrate_command = "migrate -d tcp:%s:%s" % (target, port)
|
1502 |
self._CallMonitorCommand(instance_name, migrate_command)
|
1503 |
|
1504 |
info_command = "info migrate"
|
1505 |
done = False
|
1506 |
broken_answers = 0
|
1507 |
while not done: |
1508 |
result = self._CallMonitorCommand(instance_name, info_command)
|
1509 |
match = self._MIGRATION_STATUS_RE.search(result.stdout)
|
1510 |
if not match: |
1511 |
broken_answers += 1
|
1512 |
if not result.stdout: |
1513 |
logging.info("KVM: empty 'info migrate' result")
|
1514 |
else:
|
1515 |
logging.warning("KVM: unknown 'info migrate' result: %s",
|
1516 |
result.stdout) |
1517 |
time.sleep(self._MIGRATION_INFO_RETRY_DELAY)
|
1518 |
else:
|
1519 |
status = match.group(1)
|
1520 |
if status == "completed": |
1521 |
done = True
|
1522 |
elif status == "active": |
1523 |
# reset the broken answers count
|
1524 |
broken_answers = 0
|
1525 |
time.sleep(self._MIGRATION_INFO_RETRY_DELAY)
|
1526 |
elif status == "failed" or status == "cancelled": |
1527 |
if not live: |
1528 |
self._CallMonitorCommand(instance_name, 'cont') |
1529 |
raise errors.HypervisorError("Migration %s at the kvm level" % |
1530 |
status) |
1531 |
else:
|
1532 |
logging.warning("KVM: unknown migration status '%s'", status)
|
1533 |
broken_answers += 1
|
1534 |
time.sleep(self._MIGRATION_INFO_RETRY_DELAY)
|
1535 |
if broken_answers >= self._MIGRATION_INFO_MAX_BAD_ANSWERS: |
1536 |
raise errors.HypervisorError("Too many 'info migrate' broken answers") |
1537 |
|
1538 |
utils.KillProcess(pid) |
1539 |
self._RemoveInstanceRuntimeFiles(pidfile, instance_name)
|
1540 |
|
1541 |
def GetNodeInfo(self): |
1542 |
"""Return information about the node.
|
1543 |
|
1544 |
@return: a dict with the following keys (values in MiB):
|
1545 |
- memory_total: the total memory size on the node
|
1546 |
- memory_free: the available memory on the node for instances
|
1547 |
- memory_dom0: the memory used by the node itself, if available
|
1548 |
- hv_version: the hypervisor version in the form (major, minor,
|
1549 |
revision)
|
1550 |
|
1551 |
"""
|
1552 |
result = self.GetLinuxNodeInfo()
|
1553 |
_, v_major, v_min, v_rev = self._GetKVMVersion()
|
1554 |
result[constants.HV_NODEINFO_KEY_VERSION] = (v_major, v_min, v_rev) |
1555 |
return result
|
1556 |
|
1557 |
@classmethod
|
1558 |
def GetInstanceConsole(cls, instance, hvparams, beparams): |
1559 |
"""Return a command for connecting to the console of an instance.
|
1560 |
|
1561 |
"""
|
1562 |
if hvparams[constants.HV_SERIAL_CONSOLE]:
|
1563 |
cmd = [constants.KVM_CONSOLE_WRAPPER, |
1564 |
constants.SOCAT_PATH, utils.ShellQuote(instance.name), |
1565 |
utils.ShellQuote(cls._InstanceMonitor(instance.name)), |
1566 |
"STDIO,%s" % cls._SocatUnixConsoleParams(),
|
1567 |
"UNIX-CONNECT:%s" % cls._InstanceSerial(instance.name)]
|
1568 |
return objects.InstanceConsole(instance=instance.name,
|
1569 |
kind=constants.CONS_SSH, |
1570 |
host=instance.primary_node, |
1571 |
user=constants.GANETI_RUNAS, |
1572 |
command=cmd) |
1573 |
|
1574 |
vnc_bind_address = hvparams[constants.HV_VNC_BIND_ADDRESS] |
1575 |
if vnc_bind_address and instance.network_port > constants.VNC_BASE_PORT: |
1576 |
display = instance.network_port - constants.VNC_BASE_PORT |
1577 |
return objects.InstanceConsole(instance=instance.name,
|
1578 |
kind=constants.CONS_VNC, |
1579 |
host=vnc_bind_address, |
1580 |
port=instance.network_port, |
1581 |
display=display) |
1582 |
|
1583 |
spice_bind = hvparams[constants.HV_KVM_SPICE_BIND] |
1584 |
if spice_bind:
|
1585 |
return objects.InstanceConsole(instance=instance.name,
|
1586 |
kind=constants.CONS_SPICE, |
1587 |
host=spice_bind, |
1588 |
port=instance.network_port) |
1589 |
|
1590 |
return objects.InstanceConsole(instance=instance.name,
|
1591 |
kind=constants.CONS_MESSAGE, |
1592 |
message=("No serial shell for instance %s" %
|
1593 |
instance.name)) |
1594 |
|
1595 |
def Verify(self): |
1596 |
"""Verify the hypervisor.
|
1597 |
|
1598 |
Check that the binary exists.
|
1599 |
|
1600 |
"""
|
1601 |
if not os.path.exists(constants.KVM_PATH): |
1602 |
return "The kvm binary ('%s') does not exist." % constants.KVM_PATH |
1603 |
if not os.path.exists(constants.SOCAT_PATH): |
1604 |
return "The socat binary ('%s') does not exist." % constants.SOCAT_PATH |
1605 |
|
1606 |
@classmethod
|
1607 |
def CheckParameterSyntax(cls, hvparams): |
1608 |
"""Check the given parameters for validity.
|
1609 |
|
1610 |
@type hvparams: dict
|
1611 |
@param hvparams: dictionary with parameter names/value
|
1612 |
@raise errors.HypervisorError: when a parameter is not valid
|
1613 |
|
1614 |
"""
|
1615 |
super(KVMHypervisor, cls).CheckParameterSyntax(hvparams)
|
1616 |
|
1617 |
kernel_path = hvparams[constants.HV_KERNEL_PATH] |
1618 |
if kernel_path:
|
1619 |
if not hvparams[constants.HV_ROOT_PATH]: |
1620 |
raise errors.HypervisorError("Need a root partition for the instance," |
1621 |
" if a kernel is defined")
|
1622 |
|
1623 |
if (hvparams[constants.HV_VNC_X509_VERIFY] and |
1624 |
not hvparams[constants.HV_VNC_X509]):
|
1625 |
raise errors.HypervisorError("%s must be defined, if %s is" % |
1626 |
(constants.HV_VNC_X509, |
1627 |
constants.HV_VNC_X509_VERIFY)) |
1628 |
|
1629 |
boot_order = hvparams[constants.HV_BOOT_ORDER] |
1630 |
if (boot_order == constants.HT_BO_CDROM and |
1631 |
not hvparams[constants.HV_CDROM_IMAGE_PATH]):
|
1632 |
raise errors.HypervisorError("Cannot boot from cdrom without an" |
1633 |
" ISO path")
|
1634 |
|
1635 |
security_model = hvparams[constants.HV_SECURITY_MODEL] |
1636 |
if security_model == constants.HT_SM_USER:
|
1637 |
if not hvparams[constants.HV_SECURITY_DOMAIN]: |
1638 |
raise errors.HypervisorError("A security domain (user to run kvm as)" |
1639 |
" must be specified")
|
1640 |
elif (security_model == constants.HT_SM_NONE or |
1641 |
security_model == constants.HT_SM_POOL): |
1642 |
if hvparams[constants.HV_SECURITY_DOMAIN]:
|
1643 |
raise errors.HypervisorError("Cannot have a security domain when the" |
1644 |
" security model is 'none' or 'pool'")
|
1645 |
|
1646 |
spice_bind = hvparams[constants.HV_KVM_SPICE_BIND] |
1647 |
spice_ip_version = hvparams[constants.HV_KVM_SPICE_IP_VERSION] |
1648 |
if spice_bind:
|
1649 |
if spice_ip_version != constants.IFACE_NO_IP_VERSION_SPECIFIED:
|
1650 |
# if an IP version is specified, the spice_bind parameter must be an
|
1651 |
# IP of that family
|
1652 |
if (netutils.IP4Address.IsValid(spice_bind) and |
1653 |
spice_ip_version != constants.IP4_VERSION): |
1654 |
raise errors.HypervisorError("spice: got an IPv4 address (%s), but" |
1655 |
" the specified IP version is %s" %
|
1656 |
(spice_bind, spice_ip_version)) |
1657 |
|
1658 |
if (netutils.IP6Address.IsValid(spice_bind) and |
1659 |
spice_ip_version != constants.IP6_VERSION): |
1660 |
raise errors.HypervisorError("spice: got an IPv6 address (%s), but" |
1661 |
" the specified IP version is %s" %
|
1662 |
(spice_bind, spice_ip_version)) |
1663 |
else:
|
1664 |
# All the other SPICE parameters depend on spice_bind being set. Raise an
|
1665 |
# error if any of them is set without it.
|
1666 |
spice_additional_params = frozenset([
|
1667 |
constants.HV_KVM_SPICE_IP_VERSION, |
1668 |
constants.HV_KVM_SPICE_PASSWORD_FILE, |
1669 |
constants.HV_KVM_SPICE_LOSSLESS_IMG_COMPR, |
1670 |
constants.HV_KVM_SPICE_JPEG_IMG_COMPR, |
1671 |
constants.HV_KVM_SPICE_ZLIB_GLZ_IMG_COMPR, |
1672 |
constants.HV_KVM_SPICE_STREAMING_VIDEO_DETECTION, |
1673 |
constants.HV_KVM_SPICE_USE_TLS, |
1674 |
]) |
1675 |
for param in spice_additional_params: |
1676 |
if hvparams[param]:
|
1677 |
raise errors.HypervisorError("spice: %s requires %s to be set" % |
1678 |
(param, constants.HV_KVM_SPICE_BIND)) |
1679 |
|
1680 |
@classmethod
|
1681 |
def ValidateParameters(cls, hvparams): |
1682 |
"""Check the given parameters for validity.
|
1683 |
|
1684 |
@type hvparams: dict
|
1685 |
@param hvparams: dictionary with parameter names/value
|
1686 |
@raise errors.HypervisorError: when a parameter is not valid
|
1687 |
|
1688 |
"""
|
1689 |
super(KVMHypervisor, cls).ValidateParameters(hvparams)
|
1690 |
|
1691 |
security_model = hvparams[constants.HV_SECURITY_MODEL] |
1692 |
if security_model == constants.HT_SM_USER:
|
1693 |
username = hvparams[constants.HV_SECURITY_DOMAIN] |
1694 |
try:
|
1695 |
pwd.getpwnam(username) |
1696 |
except KeyError: |
1697 |
raise errors.HypervisorError("Unknown security domain user %s" |
1698 |
% username) |
1699 |
|
1700 |
spice_bind = hvparams[constants.HV_KVM_SPICE_BIND] |
1701 |
if spice_bind:
|
1702 |
# only one of VNC and SPICE can be used currently.
|
1703 |
if hvparams[constants.HV_VNC_BIND_ADDRESS]:
|
1704 |
raise errors.HypervisorError("both SPICE and VNC are configured, but" |
1705 |
" only one of them can be used at a"
|
1706 |
" given time.")
|
1707 |
|
1708 |
# KVM version should be >= 0.14.0
|
1709 |
_, v_major, v_min, _ = cls._GetKVMVersion() |
1710 |
if (v_major, v_min) < (0, 14): |
1711 |
raise errors.HypervisorError("spice is configured, but it is not" |
1712 |
" available in versions of KVM < 0.14")
|
1713 |
|
1714 |
# if spice_bind is not an IP address, it must be a valid interface
|
1715 |
bound_to_addr = (netutils.IP4Address.IsValid(spice_bind) |
1716 |
or netutils.IP6Address.IsValid(spice_bind))
|
1717 |
if not bound_to_addr and not netutils.IsValidInterface(spice_bind): |
1718 |
raise errors.HypervisorError("spice: the %s parameter must be either" |
1719 |
" a valid IP address or interface name" %
|
1720 |
constants.HV_KVM_SPICE_BIND) |
1721 |
|
1722 |
@classmethod
|
1723 |
def PowercycleNode(cls): |
1724 |
"""KVM powercycle, just a wrapper over Linux powercycle.
|
1725 |
|
1726 |
"""
|
1727 |
cls.LinuxPowercycle() |