4 # Copyright (C) 2008, 2009, 2010, 2011 Google Inc.
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 2 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful, but
12 # WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 # General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program; if not, write to the Free Software
18 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
40 from ganeti import utils
41 from ganeti import constants
42 from ganeti import errors
43 from ganeti import serializer
44 from ganeti import objects
45 from ganeti import uidpool
46 from ganeti import ssconf
47 from ganeti.hypervisor import hv_base
48 from ganeti import netutils
49 from ganeti.utils import wrapper as utils_wrapper
52 _KVM_NETWORK_SCRIPT = constants.SYSCONFDIR + "/ganeti/kvm-vif-bridge"
54 # TUN/TAP driver constants, taken from <linux/if_tun.h>
55 # They are architecture-independent and already hardcoded in qemu-kvm source,
56 # so we can safely include them here.
57 TUNSETIFF = 0x400454ca
58 TUNGETIFF = 0x800454d2
59 TUNGETFEATURES = 0x800454cf
65 def _ProbeTapVnetHdr(fd):
66 """Check whether to enable the IFF_VNET_HDR flag.
68 To do this, _all_ of the following conditions must be met:
69 1. TUNGETFEATURES ioctl() *must* be implemented
70 2. TUNGETFEATURES ioctl() result *must* contain the IFF_VNET_HDR flag
71 3. TUNGETIFF ioctl() *must* be implemented; reading the kernel code in
72 drivers/net/tun.c there is no way to test this until after the tap device
73 has been created using TUNSETIFF, and there is no way to change the
74 IFF_VNET_HDR flag after creating the interface, catch-22! However both
75 TUNGETIFF and TUNGETFEATURES were introduced in kernel version 2.6.27,
76 thus we can expect TUNGETIFF to be present if TUNGETFEATURES is.
79 @param fd: the file descriptor of /dev/net/tun
82 req = struct.pack("I", 0)
84 res = fcntl.ioctl(fd, TUNGETFEATURES, req)
85 except EnvironmentError:
86 logging.warning("TUNGETFEATURES ioctl() not implemented")
89 tunflags = struct.unpack("I", res)[0]
90 if tunflags & IFF_VNET_HDR:
93 logging.warning("Host does not support IFF_VNET_HDR, not enabling")
97 def _OpenTap(vnet_hdr=True):
98 """Open a new tap device and return its file descriptor.
100 This is intended to be used by a qemu-type hypervisor together with the -net
101 tap,fd=<fd> command line parameter.
103 @type vnet_hdr: boolean
104 @param vnet_hdr: Enable the VNET Header
105 @return: (ifname, tapfd)
110 tapfd = os.open("/dev/net/tun", os.O_RDWR)
111 except EnvironmentError:
112 raise errors.HypervisorError("Failed to open /dev/net/tun")
114 flags = IFF_TAP | IFF_NO_PI
116 if vnet_hdr and _ProbeTapVnetHdr(tapfd):
117 flags |= IFF_VNET_HDR
119 # The struct ifreq ioctl request (see netdevice(7))
120 ifr = struct.pack("16sh", "", flags)
123 res = fcntl.ioctl(tapfd, TUNSETIFF, ifr)
124 except EnvironmentError:
125 raise errors.HypervisorError("Failed to allocate a new TAP device")
127 # Get the interface name from the ioctl
128 ifname = struct.unpack("16sh", res)[0].strip("\x00")
129 return (ifname, tapfd)
133 """QEMU Messaging Protocol (QMP) message.
137 def __init__(self, data):
138 """Creates a new QMP message based on the passed data.
141 if not isinstance(data, dict):
142 raise TypeError("QmpMessage must be initialized with a dict")
146 def __getitem__(self, field_name):
147 """Get the value of the required field if present, or None.
149 Overrides the [] operator to provide access to the message data,
150 returning None if the required item is not in the message
151 @return: the value of the field_name field, or None if field_name
152 is not contained in the message
156 if field_name in self.data:
157 return self.data[field_name]
161 def __setitem__(self, field_name, field_value):
162 """Set the value of the required field_name to field_value.
165 self.data[field_name] = field_value
168 def BuildFromJsonString(json_string):
169 """Build a QmpMessage from a JSON encoded string.
171 @type json_string: str
172 @param json_string: JSON string representing the message
173 @rtype: L{QmpMessage}
174 @return: a L{QmpMessage} built from json_string
178 data = serializer.LoadJson(json_string)
179 return QmpMessage(data)
182 # The protocol expects the JSON object to be sent as a single
183 # line, hence the need for indent=False.
184 return serializer.DumpJson(self.data, indent=False)
186 def __eq__(self, other):
187 # When comparing two QmpMessages, we are interested in comparing
188 # their internal representation of the message data
189 return self.data == other.data
193 """Connection to the QEMU Monitor using the QEMU Monitor Protocol (QMP).
196 _FIRST_MESSAGE_KEY = "QMP"
199 _ERROR_CLASS_KEY = "class"
200 _ERROR_DATA_KEY = "data"
201 _ERROR_DESC_KEY = "desc"
202 _EXECUTE_KEY = "execute"
203 _ARGUMENTS_KEY = "arguments"
204 _CAPABILITIES_COMMAND = "qmp_capabilities"
205 _MESSAGE_END_TOKEN = "\r\n"
208 def __init__(self, monitor_filename):
209 """Instantiates the QmpConnection object.
211 @type monitor_filename: string
212 @param monitor_filename: the filename of the UNIX raw socket on which the
213 QMP monitor is listening
216 self.monitor_filename = monitor_filename
217 self.sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
218 # We want to fail if the server doesn't send a complete message
219 # in a reasonable amount of time
220 self.sock.settimeout(self._SOCKET_TIMEOUT)
221 self._connected = False
224 def _check_connection(self):
225 """Make sure that the connection is established.
228 if not self._connected:
229 raise errors.ProgrammerError("To use a QmpConnection you need to first"
230 " invoke connect() on it")
233 """Connects to the QMP monitor.
235 Connects to the UNIX socket and makes sure that we can actually send and
236 receive data to the kvm instance via QMP.
238 @raise errors.HypervisorError: when there are communication errors
239 @raise errors.ProgrammerError: when there are data serialization errors
242 self.sock.connect(self.monitor_filename)
243 self._connected = True
245 # Check if we receive a correct greeting message from the server
246 # (As per the QEMU Protocol Specification 0.1 - section 2.2)
247 greeting = self._Recv()
248 if not greeting[self._FIRST_MESSAGE_KEY]:
249 self._connected = False
250 raise errors.HypervisorError("kvm: qmp communication error (wrong"
253 # Let's put the monitor in command mode using the qmp_capabilities
254 # command, or else no command will be executable.
255 # (As per the QEMU Protocol Specification 0.1 - section 4)
256 self.Execute(self._CAPABILITIES_COMMAND)
258 def _ParseMessage(self, buf):
259 """Extract and parse a QMP message from the given buffer.
261 Seeks for a QMP message in the given buf. If found, it parses it and
262 returns it together with the rest of the characters in the buf.
263 If no message is found, returns None and the whole buffer.
265 @raise errors.ProgrammerError: when there are data serialization errors
269 # Check if we got the message end token (CRLF, as per the QEMU Protocol
270 # Specification 0.1 - Section 2.1.1)
271 pos = buf.find(self._MESSAGE_END_TOKEN)
274 message = QmpMessage.BuildFromJsonString(buf[:pos + 1])
275 except Exception, err:
276 raise errors.ProgrammerError("QMP data serialization error: %s" % err)
279 return (message, buf)
282 """Receives a message from QMP and decodes the received JSON object.
285 @return: the received message
286 @raise errors.HypervisorError: when there are communication errors
287 @raise errors.ProgrammerError: when there are data serialization errors
290 self._check_connection()
292 # Check if there is already a message in the buffer
293 (message, self._buf) = self._ParseMessage(self._buf)
297 recv_buffer = StringIO.StringIO(self._buf)
298 recv_buffer.seek(len(self._buf))
301 data = self.sock.recv(4096)
304 recv_buffer.write(data)
306 (message, self._buf) = self._ParseMessage(recv_buffer.getvalue())
310 except socket.timeout, err:
311 raise errors.HypervisorError("Timeout while receiving a QMP message: "
313 except socket.error, err:
314 raise errors.HypervisorError("Unable to receive data from KVM using the"
315 " QMP protocol: %s" % err)
317 def _Send(self, message):
318 """Encodes and sends a message to KVM using QMP.
320 @type message: QmpMessage
321 @param message: message to send to KVM
322 @raise errors.HypervisorError: when there are communication errors
323 @raise errors.ProgrammerError: when there are data serialization errors
326 self._check_connection()
328 message_str = str(message)
329 except Exception, err:
330 raise errors.ProgrammerError("QMP data deserialization error: %s" % err)
333 self.sock.sendall(message_str)
334 except socket.timeout, err:
335 raise errors.HypervisorError("Timeout while sending a QMP message: "
336 "%s (%s)" % (err.string, err.errno))
337 except socket.error, err:
338 raise errors.HypervisorError("Unable to send data from KVM using the"
339 " QMP protocol: %s" % err)
341 def Execute(self, command, arguments=None):
342 """Executes a QMP command and returns the response of the server.
345 @param command: the command to execute
346 @type arguments: dict
347 @param arguments: dictionary of arguments to be passed to the command
349 @return: dictionary representing the received JSON object
350 @raise errors.HypervisorError: when there are communication errors
351 @raise errors.ProgrammerError: when there are data serialization errors
354 self._check_connection()
355 message = QmpMessage({self._EXECUTE_KEY: command})
357 message[self._ARGUMENTS_KEY] = arguments
360 # Events can occur between the sending of the command and the reception
361 # of the response, so we need to filter out messages with the event key.
363 response = self._Recv()
364 err = response[self._ERROR_KEY]
366 raise errors.HypervisorError("kvm: error executing the %s"
367 " command: %s (%s, %s):" %
369 err[self._ERROR_DESC_KEY],
370 err[self._ERROR_CLASS_KEY],
371 err[self._ERROR_DATA_KEY]))
373 elif not response[self._EVENT_KEY]:
377 class KVMHypervisor(hv_base.BaseHypervisor):
378 """KVM hypervisor interface"""
381 _ROOT_DIR = constants.RUN_GANETI_DIR + "/kvm-hypervisor"
382 _PIDS_DIR = _ROOT_DIR + "/pid" # contains live instances pids
383 _UIDS_DIR = _ROOT_DIR + "/uid" # contains instances reserved uids
384 _CTRL_DIR = _ROOT_DIR + "/ctrl" # contains instances control sockets
385 _CONF_DIR = _ROOT_DIR + "/conf" # contains instances startup data
386 _NICS_DIR = _ROOT_DIR + "/nic" # contains instances nic <-> tap associations
387 _KEYMAP_DIR = _ROOT_DIR + "/keymap" # contains instances keymaps
388 # KVM instances with chroot enabled are started in empty chroot directories.
389 _CHROOT_DIR = _ROOT_DIR + "/chroot" # for empty chroot directories
390 # After an instance is stopped, its chroot directory is removed.
391 # If the chroot directory is not empty, it can't be removed.
392 # A non-empty chroot directory indicates a possible security incident.
393 # To support forensics, the non-empty chroot directory is quarantined in
394 # a separate directory, called 'chroot-quarantine'.
395 _CHROOT_QUARANTINE_DIR = _ROOT_DIR + "/chroot-quarantine"
396 _DIRS = [_ROOT_DIR, _PIDS_DIR, _UIDS_DIR, _CTRL_DIR, _CONF_DIR, _NICS_DIR,
397 _CHROOT_DIR, _CHROOT_QUARANTINE_DIR]
400 constants.HV_KERNEL_PATH: hv_base.OPT_FILE_CHECK,
401 constants.HV_INITRD_PATH: hv_base.OPT_FILE_CHECK,
402 constants.HV_ROOT_PATH: hv_base.NO_CHECK,
403 constants.HV_KERNEL_ARGS: hv_base.NO_CHECK,
404 constants.HV_ACPI: hv_base.NO_CHECK,
405 constants.HV_SERIAL_CONSOLE: hv_base.NO_CHECK,
406 constants.HV_VNC_BIND_ADDRESS:
407 (False, lambda x: (netutils.IP4Address.IsValid(x) or
408 utils.IsNormAbsPath(x)),
409 "the VNC bind address must be either a valid IP address or an absolute"
410 " pathname", None, None),
411 constants.HV_VNC_TLS: hv_base.NO_CHECK,
412 constants.HV_VNC_X509: hv_base.OPT_DIR_CHECK,
413 constants.HV_VNC_X509_VERIFY: hv_base.NO_CHECK,
414 constants.HV_VNC_PASSWORD_FILE: hv_base.OPT_FILE_CHECK,
415 constants.HV_KVM_SPICE_BIND: hv_base.NO_CHECK, # will be checked later
416 constants.HV_KVM_SPICE_IP_VERSION:
417 (False, lambda x: (x == constants.IFACE_NO_IP_VERSION_SPECIFIED or
418 x in constants.VALID_IP_VERSIONS),
419 "the SPICE IP version should be 4 or 6",
421 constants.HV_KVM_SPICE_PASSWORD_FILE: hv_base.OPT_FILE_CHECK,
422 constants.HV_KVM_FLOPPY_IMAGE_PATH: hv_base.OPT_FILE_CHECK,
423 constants.HV_CDROM_IMAGE_PATH: hv_base.OPT_FILE_CHECK,
424 constants.HV_KVM_CDROM2_IMAGE_PATH: hv_base.OPT_FILE_CHECK,
425 constants.HV_BOOT_ORDER:
426 hv_base.ParamInSet(True, constants.HT_KVM_VALID_BO_TYPES),
427 constants.HV_NIC_TYPE:
428 hv_base.ParamInSet(True, constants.HT_KVM_VALID_NIC_TYPES),
429 constants.HV_DISK_TYPE:
430 hv_base.ParamInSet(True, constants.HT_KVM_VALID_DISK_TYPES),
431 constants.HV_KVM_CDROM_DISK_TYPE:
432 hv_base.ParamInSet(False, constants.HT_KVM_VALID_DISK_TYPES),
433 constants.HV_USB_MOUSE:
434 hv_base.ParamInSet(False, constants.HT_KVM_VALID_MOUSE_TYPES),
435 constants.HV_KEYMAP: hv_base.NO_CHECK,
436 constants.HV_MIGRATION_PORT: hv_base.REQ_NET_PORT_CHECK,
437 constants.HV_MIGRATION_BANDWIDTH: hv_base.NO_CHECK,
438 constants.HV_MIGRATION_DOWNTIME: hv_base.NO_CHECK,
439 constants.HV_MIGRATION_MODE: hv_base.MIGRATION_MODE_CHECK,
440 constants.HV_USE_LOCALTIME: hv_base.NO_CHECK,
441 constants.HV_DISK_CACHE:
442 hv_base.ParamInSet(True, constants.HT_VALID_CACHE_TYPES),
443 constants.HV_SECURITY_MODEL:
444 hv_base.ParamInSet(True, constants.HT_KVM_VALID_SM_TYPES),
445 constants.HV_SECURITY_DOMAIN: hv_base.NO_CHECK,
446 constants.HV_KVM_FLAG:
447 hv_base.ParamInSet(False, constants.HT_KVM_FLAG_VALUES),
448 constants.HV_VHOST_NET: hv_base.NO_CHECK,
449 constants.HV_KVM_USE_CHROOT: hv_base.NO_CHECK,
450 constants.HV_MEM_PATH: hv_base.OPT_DIR_CHECK,
451 constants.HV_REBOOT_BEHAVIOR:
452 hv_base.ParamInSet(True, constants.REBOOT_BEHAVIORS)
455 _MIGRATION_STATUS_RE = re.compile("Migration\s+status:\s+(\w+)",
457 _MIGRATION_INFO_MAX_BAD_ANSWERS = 5
458 _MIGRATION_INFO_RETRY_DELAY = 2
460 _VERSION_RE = re.compile(r"\b(\d+)\.(\d+)\.(\d+)\b")
467 hv_base.BaseHypervisor.__init__(self)
468 # Let's make sure the directories we need exist, even if the RUN_DIR lives
469 # in a tmpfs filesystem or has been otherwise wiped out.
470 dirs = [(dname, constants.RUN_DIRS_MODE) for dname in self._DIRS]
471 utils.EnsureDirs(dirs)
474 def _InstancePidFile(cls, instance_name):
475 """Returns the instance pidfile.
478 return utils.PathJoin(cls._PIDS_DIR, instance_name)
481 def _InstanceUidFile(cls, instance_name):
482 """Returns the instance uidfile.
485 return utils.PathJoin(cls._UIDS_DIR, instance_name)
488 def _InstancePidInfo(cls, pid):
489 """Check pid file for instance information.
491 Check that a pid file is associated with an instance, and retrieve
492 information from its command line.
494 @type pid: string or int
495 @param pid: process id of the instance to check
497 @return: (instance_name, memory, vcpus)
498 @raise errors.HypervisorError: when an instance cannot be found
501 alive = utils.IsProcessAlive(pid)
503 raise errors.HypervisorError("Cannot get info for pid %s" % pid)
505 cmdline_file = utils.PathJoin("/proc", str(pid), "cmdline")
507 cmdline = utils.ReadFile(cmdline_file)
508 except EnvironmentError, err:
509 raise errors.HypervisorError("Can't open cmdline file for pid %s: %s" %
516 arg_list = cmdline.split("\x00")
518 arg = arg_list.pop(0)
520 instance = arg_list.pop(0)
522 memory = int(arg_list.pop(0))
524 vcpus = int(arg_list.pop(0))
527 raise errors.HypervisorError("Pid %s doesn't contain a ganeti kvm"
530 return (instance, memory, vcpus)
532 def _InstancePidAlive(self, instance_name):
533 """Returns the instance pidfile, pid, and liveness.
535 @type instance_name: string
536 @param instance_name: instance name
538 @return: (pid file name, pid, liveness)
541 pidfile = self._InstancePidFile(instance_name)
542 pid = utils.ReadPidFile(pidfile)
546 cmd_instance = self._InstancePidInfo(pid)[0]
547 alive = (cmd_instance == instance_name)
548 except errors.HypervisorError:
551 return (pidfile, pid, alive)
553 def _CheckDown(self, instance_name):
554 """Raises an error unless the given instance is down.
557 alive = self._InstancePidAlive(instance_name)[2]
559 raise errors.HypervisorError("Failed to start instance %s: %s" %
560 (instance_name, "already running"))
563 def _InstanceMonitor(cls, instance_name):
564 """Returns the instance monitor socket name
567 return utils.PathJoin(cls._CTRL_DIR, "%s.monitor" % instance_name)
570 def _InstanceSerial(cls, instance_name):
571 """Returns the instance serial socket name
574 return utils.PathJoin(cls._CTRL_DIR, "%s.serial" % instance_name)
577 def _InstanceQmpMonitor(cls, instance_name):
578 """Returns the instance serial QMP socket name
581 return utils.PathJoin(cls._CTRL_DIR, "%s.qmp" % instance_name)
584 def _SocatUnixConsoleParams():
585 """Returns the correct parameters for socat
587 If we have a new-enough socat we can use raw mode with an escape character.
590 if constants.SOCAT_USE_ESCAPE:
591 return "raw,echo=0,escape=%s" % constants.SOCAT_ESCAPE_CODE
593 return "echo=0,icanon=0"
596 def _InstanceKVMRuntime(cls, instance_name):
597 """Returns the instance KVM runtime filename
600 return utils.PathJoin(cls._CONF_DIR, "%s.runtime" % instance_name)
603 def _InstanceChrootDir(cls, instance_name):
604 """Returns the name of the KVM chroot dir of the instance
607 return utils.PathJoin(cls._CHROOT_DIR, instance_name)
610 def _InstanceNICDir(cls, instance_name):
611 """Returns the name of the directory holding the tap device files for a
615 return utils.PathJoin(cls._NICS_DIR, instance_name)
618 def _InstanceNICFile(cls, instance_name, seq):
619 """Returns the name of the file containing the tap device for a given NIC
622 return utils.PathJoin(cls._InstanceNICDir(instance_name), str(seq))
625 def _InstanceKeymapFile(cls, instance_name):
626 """Returns the name of the file containing the keymap for a given instance
629 return utils.PathJoin(cls._KEYMAP_DIR, instance_name)
632 def _TryReadUidFile(cls, uid_file):
633 """Try to read a uid file
636 if os.path.exists(uid_file):
638 uid = int(utils.ReadOneLineFile(uid_file))
640 except EnvironmentError:
641 logging.warning("Can't read uid file", exc_info=True)
642 except (TypeError, ValueError):
643 logging.warning("Can't parse uid file contents", exc_info=True)
647 def _RemoveInstanceRuntimeFiles(cls, pidfile, instance_name):
648 """Removes an instance's rutime sockets/files/dirs.
651 utils.RemoveFile(pidfile)
652 utils.RemoveFile(cls._InstanceMonitor(instance_name))
653 utils.RemoveFile(cls._InstanceSerial(instance_name))
654 utils.RemoveFile(cls._InstanceQmpMonitor(instance_name))
655 utils.RemoveFile(cls._InstanceKVMRuntime(instance_name))
656 utils.RemoveFile(cls._InstanceKeymapFile(instance_name))
657 uid_file = cls._InstanceUidFile(instance_name)
658 uid = cls._TryReadUidFile(uid_file)
659 utils.RemoveFile(uid_file)
661 uidpool.ReleaseUid(uid)
663 shutil.rmtree(cls._InstanceNICDir(instance_name))
665 if err.errno != errno.ENOENT:
668 chroot_dir = cls._InstanceChrootDir(instance_name)
669 utils.RemoveDir(chroot_dir)
671 if err.errno == errno.ENOTEMPTY:
672 # The chroot directory is expected to be empty, but it isn't.
673 new_chroot_dir = tempfile.mkdtemp(dir=cls._CHROOT_QUARANTINE_DIR,
676 utils.TimestampForFilename()))
677 logging.warning("The chroot directory of instance %s can not be"
678 " removed as it is not empty. Moving it to the"
679 " quarantine instead. Please investigate the"
680 " contents (%s) and clean up manually",
681 instance_name, new_chroot_dir)
682 utils.RenameFile(chroot_dir, new_chroot_dir)
687 def _ConfigureNIC(instance, seq, nic, tap):
688 """Run the network configuration script for a specified NIC
690 @param instance: instance we're acting on
691 @type instance: instance object
692 @param seq: nic sequence number
694 @param nic: nic we're acting on
695 @type nic: nic object
696 @param tap: the host's tap interface this NIC corresponds to
702 tags = " ".join(instance.tags)
707 "PATH": "%s:/sbin:/usr/sbin" % os.environ["PATH"],
708 "INSTANCE": instance.name,
710 "MODE": nic.nicparams[constants.NIC_MODE],
712 "INTERFACE_INDEX": str(seq),
719 if nic.nicparams[constants.NIC_LINK]:
720 env["LINK"] = nic.nicparams[constants.NIC_LINK]
722 if nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
723 env["BRIDGE"] = nic.nicparams[constants.NIC_LINK]
725 result = utils.RunCmd([constants.KVM_IFUP, tap], env=env)
727 raise errors.HypervisorError("Failed to configure interface %s: %s."
728 " Network configuration script output: %s" %
729 (tap, result.fail_reason, result.output))
731 def ListInstances(self):
732 """Get the list of running instances.
734 We can do this by listing our live instances directory and
735 checking whether the associated kvm process is still alive.
739 for name in os.listdir(self._PIDS_DIR):
740 if self._InstancePidAlive(name)[2]:
744 def GetInstanceInfo(self, instance_name):
745 """Get instance properties.
747 @type instance_name: string
748 @param instance_name: the instance name
749 @rtype: tuple of strings
750 @return: (name, id, memory, vcpus, stat, times)
753 _, pid, alive = self._InstancePidAlive(instance_name)
757 _, memory, vcpus = self._InstancePidInfo(pid)
761 return (instance_name, pid, memory, vcpus, stat, times)
763 def GetAllInstancesInfo(self):
764 """Get properties of all instances.
766 @return: list of tuples (name, id, memory, vcpus, stat, times)
770 for name in os.listdir(self._PIDS_DIR):
772 info = self.GetInstanceInfo(name)
773 except errors.HypervisorError:
779 def _GenerateKVMRuntime(self, instance, block_devices, startup_paused):
780 """Generate KVM information to start an instance.
783 _, v_major, v_min, _ = self._GetKVMVersion()
785 pidfile = self._InstancePidFile(instance.name)
786 kvm = constants.KVM_PATH
788 # used just by the vnc server, if enabled
789 kvm_cmd.extend(["-name", instance.name])
790 kvm_cmd.extend(["-m", instance.beparams[constants.BE_MEMORY]])
791 kvm_cmd.extend(["-smp", instance.beparams[constants.BE_VCPUS]])
792 kvm_cmd.extend(["-pidfile", pidfile])
793 kvm_cmd.extend(["-daemonize"])
794 if not instance.hvparams[constants.HV_ACPI]:
795 kvm_cmd.extend(["-no-acpi"])
797 kvm_cmd.extend(["-S"])
798 if instance.hvparams[constants.HV_REBOOT_BEHAVIOR] == \
799 constants.INSTANCE_REBOOT_EXIT:
800 kvm_cmd.extend(["-no-reboot"])
802 hvp = instance.hvparams
803 boot_disk = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_DISK
804 boot_cdrom = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_CDROM
805 boot_floppy = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_FLOPPY
806 boot_network = hvp[constants.HV_BOOT_ORDER] == constants.HT_BO_NETWORK
808 self.ValidateParameters(hvp)
810 if hvp[constants.HV_KVM_FLAG] == constants.HT_KVM_ENABLED:
811 kvm_cmd.extend(["-enable-kvm"])
812 elif hvp[constants.HV_KVM_FLAG] == constants.HT_KVM_DISABLED:
813 kvm_cmd.extend(["-disable-kvm"])
816 kvm_cmd.extend(["-boot", "n"])
818 disk_type = hvp[constants.HV_DISK_TYPE]
819 if disk_type == constants.HT_DISK_PARAVIRTUAL:
820 if_val = ",if=virtio"
822 if_val = ",if=%s" % disk_type
824 disk_cache = hvp[constants.HV_DISK_CACHE]
825 if instance.disk_template in constants.DTS_EXT_MIRROR:
826 if disk_cache != "none":
827 # TODO: make this a hard error, instead of a silent overwrite
828 logging.warning("KVM: overriding disk_cache setting '%s' with 'none'"
829 " to prevent shared storage corruption on migration",
831 cache_val = ",cache=none"
832 elif disk_cache != constants.HT_CACHE_DEFAULT:
833 cache_val = ",cache=%s" % disk_cache
836 for cfdev, dev_path in block_devices:
837 if cfdev.mode != constants.DISK_RDWR:
838 raise errors.HypervisorError("Instance has read-only disks which"
839 " are not supported by KVM")
840 # TODO: handle FD_LOOP and FD_BLKTAP (?)
843 kvm_cmd.extend(["-boot", "c"])
845 if (v_major, v_min) < (0, 14) and disk_type != constants.HT_DISK_IDE:
846 boot_val = ",boot=on"
848 drive_val = "file=%s,format=raw%s%s%s" % (dev_path, if_val, boot_val,
850 kvm_cmd.extend(["-drive", drive_val])
852 #Now we can specify a different device type for CDROM devices.
853 cdrom_disk_type = hvp[constants.HV_KVM_CDROM_DISK_TYPE]
854 if not cdrom_disk_type:
855 cdrom_disk_type = disk_type
857 iso_image = hvp[constants.HV_CDROM_IMAGE_PATH]
859 options = ",format=raw,media=cdrom"
861 kvm_cmd.extend(["-boot", "d"])
862 if cdrom_disk_type != constants.HT_DISK_IDE:
863 options = "%s,boot=on,if=%s" % (options, constants.HT_DISK_IDE)
865 options = "%s,boot=on" % options
867 if cdrom_disk_type == constants.HT_DISK_PARAVIRTUAL:
868 if_val = ",if=virtio"
870 if_val = ",if=%s" % cdrom_disk_type
871 options = "%s%s" % (options, if_val)
872 drive_val = "file=%s%s" % (iso_image, options)
873 kvm_cmd.extend(["-drive", drive_val])
875 iso_image2 = hvp[constants.HV_KVM_CDROM2_IMAGE_PATH]
877 options = ",format=raw,media=cdrom"
878 if cdrom_disk_type == constants.HT_DISK_PARAVIRTUAL:
879 if_val = ",if=virtio"
881 if_val = ",if=%s" % cdrom_disk_type
882 options = "%s%s" % (options, if_val)
883 drive_val = "file=%s%s" % (iso_image2, options)
884 kvm_cmd.extend(["-drive", drive_val])
886 floppy_image = hvp[constants.HV_KVM_FLOPPY_IMAGE_PATH]
888 options = ",format=raw,media=disk"
890 kvm_cmd.extend(["-boot", "a"])
891 options = "%s,boot=on" % options
892 if_val = ",if=floppy"
893 options = "%s%s" % (options, if_val)
894 drive_val = "file=%s%s" % (floppy_image, options)
895 kvm_cmd.extend(["-drive", drive_val])
897 kernel_path = hvp[constants.HV_KERNEL_PATH]
899 kvm_cmd.extend(["-kernel", kernel_path])
900 initrd_path = hvp[constants.HV_INITRD_PATH]
902 kvm_cmd.extend(["-initrd", initrd_path])
903 root_append = ["root=%s" % hvp[constants.HV_ROOT_PATH],
904 hvp[constants.HV_KERNEL_ARGS]]
905 if hvp[constants.HV_SERIAL_CONSOLE]:
906 root_append.append("console=ttyS0,38400")
907 kvm_cmd.extend(["-append", " ".join(root_append)])
909 mem_path = hvp[constants.HV_MEM_PATH]
911 kvm_cmd.extend(["-mem-path", mem_path, "-mem-prealloc"])
913 mouse_type = hvp[constants.HV_USB_MOUSE]
914 vnc_bind_address = hvp[constants.HV_VNC_BIND_ADDRESS]
917 kvm_cmd.extend(["-usb"])
918 kvm_cmd.extend(["-usbdevice", mouse_type])
919 elif vnc_bind_address:
920 kvm_cmd.extend(["-usbdevice", constants.HT_MOUSE_TABLET])
922 keymap = hvp[constants.HV_KEYMAP]
924 keymap_path = self._InstanceKeymapFile(instance.name)
925 # If a keymap file is specified, KVM won't use its internal defaults. By
926 # first including the "en-us" layout, an error on loading the actual
927 # layout (e.g. because it can't be found) won't lead to a non-functional
928 # keyboard. A keyboard with incorrect keys is still better than none.
929 utils.WriteFile(keymap_path, data="include en-us\ninclude %s\n" % keymap)
930 kvm_cmd.extend(["-k", keymap_path])
933 if netutils.IP4Address.IsValid(vnc_bind_address):
934 if instance.network_port > constants.VNC_BASE_PORT:
935 display = instance.network_port - constants.VNC_BASE_PORT
936 if vnc_bind_address == constants.IP4_ADDRESS_ANY:
937 vnc_arg = ":%d" % (display)
939 vnc_arg = "%s:%d" % (vnc_bind_address, display)
941 logging.error("Network port is not a valid VNC display (%d < %d)."
942 " Not starting VNC", instance.network_port,
943 constants.VNC_BASE_PORT)
946 # Only allow tls and other option when not binding to a file, for now.
947 # kvm/qemu gets confused otherwise about the filename to use.
949 if hvp[constants.HV_VNC_TLS]:
950 vnc_append = "%s,tls" % vnc_append
951 if hvp[constants.HV_VNC_X509_VERIFY]:
952 vnc_append = "%s,x509verify=%s" % (vnc_append,
953 hvp[constants.HV_VNC_X509])
954 elif hvp[constants.HV_VNC_X509]:
955 vnc_append = "%s,x509=%s" % (vnc_append,
956 hvp[constants.HV_VNC_X509])
957 if hvp[constants.HV_VNC_PASSWORD_FILE]:
958 vnc_append = "%s,password" % vnc_append
960 vnc_arg = "%s%s" % (vnc_arg, vnc_append)
963 vnc_arg = "unix:%s/%s.vnc" % (vnc_bind_address, instance.name)
965 kvm_cmd.extend(["-vnc", vnc_arg])
967 kvm_cmd.extend(["-nographic"])
969 monitor_dev = ("unix:%s,server,nowait" %
970 self._InstanceMonitor(instance.name))
971 kvm_cmd.extend(["-monitor", monitor_dev])
972 if hvp[constants.HV_SERIAL_CONSOLE]:
973 serial_dev = ("unix:%s,server,nowait" %
974 self._InstanceSerial(instance.name))
975 kvm_cmd.extend(["-serial", serial_dev])
977 kvm_cmd.extend(["-serial", "none"])
979 spice_bind = hvp[constants.HV_KVM_SPICE_BIND]
980 spice_ip_version = None
982 if netutils.IsValidInterface(spice_bind):
983 # The user specified a network interface, we have to figure out the IP
985 addresses = netutils.GetInterfaceIpAddresses(spice_bind)
986 spice_ip_version = hvp[constants.HV_KVM_SPICE_IP_VERSION]
988 # if the user specified an IP version and the interface does not
989 # have that kind of IP addresses, throw an exception
990 if spice_ip_version != constants.IFACE_NO_IP_VERSION_SPECIFIED:
991 if not addresses[spice_ip_version]:
992 raise errors.HypervisorError("spice: unable to get an IPv%s address"
993 " for %s" % (spice_ip_version,
996 # the user did not specify an IP version, we have to figure it out
997 elif (addresses[constants.IP4_VERSION] and
998 addresses[constants.IP6_VERSION]):
999 # we have both ipv4 and ipv6, let's use the cluster default IP
1001 cluster_family = ssconf.SimpleStore().GetPrimaryIPFamily()
1002 spice_ip_version = netutils.IPAddress.GetVersionFromAddressFamily(
1004 elif addresses[constants.IP4_VERSION]:
1005 spice_ip_version = constants.IP4_VERSION
1006 elif addresses[constants.IP6_VERSION]:
1007 spice_ip_version = constants.IP6_VERSION
1009 raise errors.HypervisorError("spice: unable to get an IP address"
1010 " for %s" % (spice_bind))
1012 spice_address = addresses[spice_ip_version][0]
1015 # spice_bind is known to be a valid IP address, because
1016 # ValidateParameters checked it.
1017 spice_address = spice_bind
1019 spice_arg = "addr=%s,port=%s" % (spice_address, instance.network_port)
1020 if not hvp[constants.HV_KVM_SPICE_PASSWORD_FILE]:
1021 spice_arg = "%s,disable-ticketing" % spice_arg
1023 if spice_ip_version:
1024 spice_arg = "%s,ipv%s" % (spice_arg, spice_ip_version)
1026 logging.info("KVM: SPICE will listen on port %s", instance.network_port)
1027 kvm_cmd.extend(["-spice", spice_arg])
1029 if hvp[constants.HV_USE_LOCALTIME]:
1030 kvm_cmd.extend(["-localtime"])
1032 if hvp[constants.HV_KVM_USE_CHROOT]:
1033 kvm_cmd.extend(["-chroot", self._InstanceChrootDir(instance.name)])
1035 # Save the current instance nics, but defer their expansion as parameters,
1036 # as we'll need to generate executable temp files for them.
1037 kvm_nics = instance.nics
1040 return (kvm_cmd, kvm_nics, hvparams)
1042 def _WriteKVMRuntime(self, instance_name, data):
1043 """Write an instance's KVM runtime
1047 utils.WriteFile(self._InstanceKVMRuntime(instance_name),
1049 except EnvironmentError, err:
1050 raise errors.HypervisorError("Failed to save KVM runtime file: %s" % err)
1052 def _ReadKVMRuntime(self, instance_name):
1053 """Read an instance's KVM runtime
1057 file_content = utils.ReadFile(self._InstanceKVMRuntime(instance_name))
1058 except EnvironmentError, err:
1059 raise errors.HypervisorError("Failed to load KVM runtime file: %s" % err)
1062 def _SaveKVMRuntime(self, instance, kvm_runtime):
1063 """Save an instance's KVM runtime
1066 kvm_cmd, kvm_nics, hvparams = kvm_runtime
1067 serialized_nics = [nic.ToDict() for nic in kvm_nics]
1068 serialized_form = serializer.Dump((kvm_cmd, serialized_nics, hvparams))
1069 self._WriteKVMRuntime(instance.name, serialized_form)
1071 def _LoadKVMRuntime(self, instance, serialized_runtime=None):
1072 """Load an instance's KVM runtime
1075 if not serialized_runtime:
1076 serialized_runtime = self._ReadKVMRuntime(instance.name)
1077 loaded_runtime = serializer.Load(serialized_runtime)
1078 kvm_cmd, serialized_nics, hvparams = loaded_runtime
1079 kvm_nics = [objects.NIC.FromDict(snic) for snic in serialized_nics]
1080 return (kvm_cmd, kvm_nics, hvparams)
1082 def _RunKVMCmd(self, name, kvm_cmd, tap_fds=None):
1083 """Run the KVM cmd and check for errors
1086 @param name: instance name
1087 @type kvm_cmd: list of strings
1088 @param kvm_cmd: runcmd input for kvm
1089 @type tap_fds: list of int
1090 @param tap_fds: fds of tap devices opened by Ganeti
1094 result = utils.RunCmd(kvm_cmd, noclose_fds=tap_fds)
1097 utils_wrapper.CloseFdNoError(fd)
1100 raise errors.HypervisorError("Failed to start instance %s: %s (%s)" %
1101 (name, result.fail_reason, result.output))
1102 if not self._InstancePidAlive(name)[2]:
1103 raise errors.HypervisorError("Failed to start instance %s" % name)
1105 def _ExecuteKVMRuntime(self, instance, kvm_runtime, incoming=None):
1106 """Execute a KVM cmd, after completing it with some last minute data
1108 @type incoming: tuple of strings
1109 @param incoming: (target_host_ip, port)
1112 # Small _ExecuteKVMRuntime hv parameters programming howto:
1113 # - conf_hvp contains the parameters as configured on ganeti. they might
1114 # have changed since the instance started; only use them if the change
1115 # won't affect the inside of the instance (which hasn't been rebooted).
1116 # - up_hvp contains the parameters as they were when the instance was
1117 # started, plus any new parameter which has been added between ganeti
1118 # versions: it is paramount that those default to a value which won't
1119 # affect the inside of the instance as well.
1120 conf_hvp = instance.hvparams
1121 name = instance.name
1122 self._CheckDown(name)
1126 kvm_cmd, kvm_nics, up_hvp = kvm_runtime
1127 up_hvp = objects.FillDict(conf_hvp, up_hvp)
1129 _, v_major, v_min, _ = self._GetKVMVersion()
1131 # We know it's safe to run as a different user upon migration, so we'll use
1132 # the latest conf, from conf_hvp.
1133 security_model = conf_hvp[constants.HV_SECURITY_MODEL]
1134 if security_model == constants.HT_SM_USER:
1135 kvm_cmd.extend(["-runas", conf_hvp[constants.HV_SECURITY_DOMAIN]])
1137 # We have reasons to believe changing something like the nic driver/type
1138 # upon migration won't exactly fly with the instance kernel, so for nic
1139 # related parameters we'll use up_hvp
1143 kvm_cmd.extend(["-net", "none"])
1147 nic_type = up_hvp[constants.HV_NIC_TYPE]
1148 if nic_type == constants.HT_NIC_PARAVIRTUAL:
1149 # From version 0.12.0, kvm uses a new sintax for network configuration.
1150 if (v_major, v_min) >= (0, 12):
1151 nic_model = "virtio-net-pci"
1154 nic_model = "virtio"
1156 if up_hvp[constants.HV_VHOST_NET]:
1157 # vhost_net is only available from version 0.13.0 or newer
1158 if (v_major, v_min) >= (0, 13):
1159 tap_extra = ",vhost=on"
1161 raise errors.HypervisorError("vhost_net is configured"
1162 " but it is not available")
1164 nic_model = nic_type
1166 for nic_seq, nic in enumerate(kvm_nics):
1167 tapname, tapfd = _OpenTap(vnet_hdr)
1168 tapfds.append(tapfd)
1169 taps.append(tapname)
1170 if (v_major, v_min) >= (0, 12):
1171 nic_val = "%s,mac=%s,netdev=netdev%s" % (nic_model, nic.mac, nic_seq)
1172 tap_val = "type=tap,id=netdev%s,fd=%d%s" % (nic_seq, tapfd, tap_extra)
1173 kvm_cmd.extend(["-netdev", tap_val, "-device", nic_val])
1175 nic_val = "nic,vlan=%s,macaddr=%s,model=%s" % (nic_seq,
1177 tap_val = "tap,vlan=%s,fd=%d" % (nic_seq, tapfd)
1178 kvm_cmd.extend(["-net", tap_val, "-net", nic_val])
1181 target, port = incoming
1182 kvm_cmd.extend(["-incoming", "tcp:%s:%s" % (target, port)])
1184 # Changing the vnc password doesn't bother the guest that much. At most it
1185 # will surprise people who connect to it. Whether positively or negatively
1187 vnc_pwd_file = conf_hvp[constants.HV_VNC_PASSWORD_FILE]
1191 vnc_pwd = utils.ReadOneLineFile(vnc_pwd_file, strict=True)
1192 except EnvironmentError, err:
1193 raise errors.HypervisorError("Failed to open VNC password file %s: %s"
1194 % (vnc_pwd_file, err))
1196 if conf_hvp[constants.HV_KVM_USE_CHROOT]:
1197 utils.EnsureDirs([(self._InstanceChrootDir(name),
1198 constants.SECURE_DIR_MODE)])
1200 # Automatically enable QMP if version is >= 0.14
1201 if (v_major, v_min) >= (0, 14):
1202 logging.debug("Enabling QMP")
1203 kvm_cmd.extend(["-qmp", "unix:%s,server,nowait" %
1204 self._InstanceQmpMonitor(instance.name)])
1206 # Configure the network now for starting instances and bridged interfaces,
1207 # during FinalizeMigration for incoming instances' routed interfaces
1208 for nic_seq, nic in enumerate(kvm_nics):
1210 nic.nicparams[constants.NIC_MODE] != constants.NIC_MODE_BRIDGED):
1212 self._ConfigureNIC(instance, nic_seq, nic, taps[nic_seq])
1214 if security_model == constants.HT_SM_POOL:
1215 ss = ssconf.SimpleStore()
1216 uid_pool = uidpool.ParseUidPool(ss.GetUidPool(), separator="\n")
1217 all_uids = set(uidpool.ExpandUidPool(uid_pool))
1218 uid = uidpool.RequestUnusedUid(all_uids)
1220 username = pwd.getpwuid(uid.GetUid()).pw_name
1221 kvm_cmd.extend(["-runas", username])
1222 self._RunKVMCmd(name, kvm_cmd, tapfds)
1224 uidpool.ReleaseUid(uid)
1228 utils.WriteFile(self._InstanceUidFile(name), data=uid.AsStr())
1230 self._RunKVMCmd(name, kvm_cmd, tapfds)
1232 utils.EnsureDirs([(self._InstanceNICDir(instance.name),
1233 constants.RUN_DIRS_MODE)])
1234 for nic_seq, tap in enumerate(taps):
1235 utils.WriteFile(self._InstanceNICFile(instance.name, nic_seq),
1239 change_cmd = "change vnc password %s" % vnc_pwd
1240 self._CallMonitorCommand(instance.name, change_cmd)
1242 # Setting SPICE password. We are not vulnerable to malicious passwordless
1243 # connection attempts because SPICE by default does not allow connections
1244 # if neither a password nor the "disable_ticketing" options are specified.
1245 # As soon as we send the password via QMP, that password is a valid ticket
1247 spice_password_file = conf_hvp[constants.HV_KVM_SPICE_PASSWORD_FILE]
1248 if spice_password_file:
1250 spice_pwd = utils.ReadOneLineFile(spice_password_file, strict=True)
1251 qmp = QmpConnection(self._InstanceQmpMonitor(instance.name))
1254 "protocol": "spice",
1255 "password": spice_pwd,
1257 qmp.Execute("set_password", arguments)
1258 except EnvironmentError, err:
1259 raise errors.HypervisorError("Failed to open SPICE password file %s: %s"
1260 % (spice_password_file, err))
1262 for filename in temp_files:
1263 utils.RemoveFile(filename)
1265 def StartInstance(self, instance, block_devices, startup_paused):
1266 """Start an instance.
1269 self._CheckDown(instance.name)
1270 kvm_runtime = self._GenerateKVMRuntime(instance, block_devices,
1272 self._SaveKVMRuntime(instance, kvm_runtime)
1273 self._ExecuteKVMRuntime(instance, kvm_runtime)
1275 def _CallMonitorCommand(self, instance_name, command):
1276 """Invoke a command on the instance monitor.
1279 socat = ("echo %s | %s STDIO UNIX-CONNECT:%s" %
1280 (utils.ShellQuote(command),
1281 constants.SOCAT_PATH,
1282 utils.ShellQuote(self._InstanceMonitor(instance_name))))
1283 result = utils.RunCmd(socat)
1285 msg = ("Failed to send command '%s' to instance %s."
1286 " output: %s, error: %s, fail_reason: %s" %
1287 (command, instance_name,
1288 result.stdout, result.stderr, result.fail_reason))
1289 raise errors.HypervisorError(msg)
1294 def _GetKVMVersion(cls):
1295 """Return the installed KVM version.
1297 @return: (version, v_maj, v_min, v_rev)
1298 @raise L{errors.HypervisorError}: when the KVM version cannot be retrieved
1301 result = utils.RunCmd([constants.KVM_PATH, "--help"])
1303 raise errors.HypervisorError("Unable to get KVM version")
1304 match = cls._VERSION_RE.search(result.output.splitlines()[0])
1306 raise errors.HypervisorError("Unable to get KVM version")
1308 return (match.group(0), int(match.group(1)), int(match.group(2)),
1309 int(match.group(3)))
1311 def StopInstance(self, instance, force=False, retry=False, name=None):
1312 """Stop an instance.
1315 if name is not None and not force:
1316 raise errors.HypervisorError("Cannot shutdown cleanly by name only")
1318 name = instance.name
1319 acpi = instance.hvparams[constants.HV_ACPI]
1322 _, pid, alive = self._InstancePidAlive(name)
1323 if pid > 0 and alive:
1324 if force or not acpi:
1325 utils.KillProcess(pid)
1327 self._CallMonitorCommand(name, "system_powerdown")
1329 def CleanupInstance(self, instance_name):
1330 """Cleanup after a stopped instance
1333 pidfile, pid, alive = self._InstancePidAlive(instance_name)
1334 if pid > 0 and alive:
1335 raise errors.HypervisorError("Cannot cleanup a live instance")
1336 self._RemoveInstanceRuntimeFiles(pidfile, instance_name)
1338 def RebootInstance(self, instance):
1339 """Reboot an instance.
1342 # For some reason if we do a 'send-key ctrl-alt-delete' to the control
1343 # socket the instance will stop, but now power up again. So we'll resort
1344 # to shutdown and restart.
1345 _, _, alive = self._InstancePidAlive(instance.name)
1347 raise errors.HypervisorError("Failed to reboot instance %s:"
1348 " not running" % instance.name)
1349 # StopInstance will delete the saved KVM runtime so:
1350 # ...first load it...
1351 kvm_runtime = self._LoadKVMRuntime(instance)
1352 # ...now we can safely call StopInstance...
1353 if not self.StopInstance(instance):
1354 self.StopInstance(instance, force=True)
1355 # ...and finally we can save it again, and execute it...
1356 self._SaveKVMRuntime(instance, kvm_runtime)
1357 self._ExecuteKVMRuntime(instance, kvm_runtime)
1359 def MigrationInfo(self, instance):
1360 """Get instance information to perform a migration.
1362 @type instance: L{objects.Instance}
1363 @param instance: instance to be migrated
1365 @return: content of the KVM runtime file
1368 return self._ReadKVMRuntime(instance.name)
1370 def AcceptInstance(self, instance, info, target):
1371 """Prepare to accept an instance.
1373 @type instance: L{objects.Instance}
1374 @param instance: instance to be accepted
1376 @param info: content of the KVM runtime file on the source node
1377 @type target: string
1378 @param target: target host (usually ip), on this node
1381 kvm_runtime = self._LoadKVMRuntime(instance, serialized_runtime=info)
1382 incoming_address = (target, instance.hvparams[constants.HV_MIGRATION_PORT])
1383 self._ExecuteKVMRuntime(instance, kvm_runtime, incoming=incoming_address)
1385 def FinalizeMigration(self, instance, info, success):
1386 """Finalize an instance migration.
1388 Stop the incoming mode KVM.
1390 @type instance: L{objects.Instance}
1391 @param instance: instance whose migration is being finalized
1395 kvm_runtime = self._LoadKVMRuntime(instance, serialized_runtime=info)
1396 kvm_nics = kvm_runtime[1]
1398 for nic_seq, nic in enumerate(kvm_nics):
1399 if nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
1400 # Bridged interfaces have already been configured
1403 tap = utils.ReadFile(self._InstanceNICFile(instance.name, nic_seq))
1404 except EnvironmentError, err:
1405 logging.warning("Failed to find host interface for %s NIC #%d: %s",
1406 instance.name, nic_seq, str(err))
1409 self._ConfigureNIC(instance, nic_seq, nic, tap)
1410 except errors.HypervisorError, err:
1411 logging.warning(str(err))
1413 self._WriteKVMRuntime(instance.name, info)
1415 self.StopInstance(instance, force=True)
1417 def MigrateInstance(self, instance, target, live):
1418 """Migrate an instance to a target node.
1420 The migration will not be attempted if the instance is not
1423 @type instance: L{objects.Instance}
1424 @param instance: the instance to be migrated
1425 @type target: string
1426 @param target: ip address of the target node
1428 @param live: perform a live migration
1431 instance_name = instance.name
1432 port = instance.hvparams[constants.HV_MIGRATION_PORT]
1433 pidfile, pid, alive = self._InstancePidAlive(instance_name)
1435 raise errors.HypervisorError("Instance not running, cannot migrate")
1438 self._CallMonitorCommand(instance_name, "stop")
1440 migrate_command = ("migrate_set_speed %dm" %
1441 instance.hvparams[constants.HV_MIGRATION_BANDWIDTH])
1442 self._CallMonitorCommand(instance_name, migrate_command)
1444 migrate_command = ("migrate_set_downtime %dms" %
1445 instance.hvparams[constants.HV_MIGRATION_DOWNTIME])
1446 self._CallMonitorCommand(instance_name, migrate_command)
1448 migrate_command = "migrate -d tcp:%s:%s" % (target, port)
1449 self._CallMonitorCommand(instance_name, migrate_command)
1451 info_command = "info migrate"
1455 result = self._CallMonitorCommand(instance_name, info_command)
1456 match = self._MIGRATION_STATUS_RE.search(result.stdout)
1459 if not result.stdout:
1460 logging.info("KVM: empty 'info migrate' result")
1462 logging.warning("KVM: unknown 'info migrate' result: %s",
1464 time.sleep(self._MIGRATION_INFO_RETRY_DELAY)
1466 status = match.group(1)
1467 if status == "completed":
1469 elif status == "active":
1470 # reset the broken answers count
1472 time.sleep(self._MIGRATION_INFO_RETRY_DELAY)
1473 elif status == "failed" or status == "cancelled":
1475 self._CallMonitorCommand(instance_name, 'cont')
1476 raise errors.HypervisorError("Migration %s at the kvm level" %
1479 logging.warning("KVM: unknown migration status '%s'", status)
1481 time.sleep(self._MIGRATION_INFO_RETRY_DELAY)
1482 if broken_answers >= self._MIGRATION_INFO_MAX_BAD_ANSWERS:
1483 raise errors.HypervisorError("Too many 'info migrate' broken answers")
1485 utils.KillProcess(pid)
1486 self._RemoveInstanceRuntimeFiles(pidfile, instance_name)
1488 def GetNodeInfo(self):
1489 """Return information about the node.
1491 This is just a wrapper over the base GetLinuxNodeInfo method.
1493 @return: a dict with the following keys (values in MiB):
1494 - memory_total: the total memory size on the node
1495 - memory_free: the available memory on the node for instances
1496 - memory_dom0: the memory used by the node itself, if available
1499 return self.GetLinuxNodeInfo()
1502 def GetInstanceConsole(cls, instance, hvparams, beparams):
1503 """Return a command for connecting to the console of an instance.
1506 if hvparams[constants.HV_SERIAL_CONSOLE]:
1507 cmd = [constants.KVM_CONSOLE_WRAPPER,
1508 constants.SOCAT_PATH, utils.ShellQuote(instance.name),
1509 utils.ShellQuote(cls._InstanceMonitor(instance.name)),
1510 "STDIO,%s" % cls._SocatUnixConsoleParams(),
1511 "UNIX-CONNECT:%s" % cls._InstanceSerial(instance.name)]
1512 return objects.InstanceConsole(instance=instance.name,
1513 kind=constants.CONS_SSH,
1514 host=instance.primary_node,
1515 user=constants.GANETI_RUNAS,
1518 vnc_bind_address = hvparams[constants.HV_VNC_BIND_ADDRESS]
1519 if vnc_bind_address and instance.network_port > constants.VNC_BASE_PORT:
1520 display = instance.network_port - constants.VNC_BASE_PORT
1521 return objects.InstanceConsole(instance=instance.name,
1522 kind=constants.CONS_VNC,
1523 host=vnc_bind_address,
1524 port=instance.network_port,
1527 return objects.InstanceConsole(instance=instance.name,
1528 kind=constants.CONS_MESSAGE,
1529 message=("No serial shell for instance %s" %
1533 """Verify the hypervisor.
1535 Check that the binary exists.
1538 if not os.path.exists(constants.KVM_PATH):
1539 return "The kvm binary ('%s') does not exist." % constants.KVM_PATH
1540 if not os.path.exists(constants.SOCAT_PATH):
1541 return "The socat binary ('%s') does not exist." % constants.SOCAT_PATH
1544 def CheckParameterSyntax(cls, hvparams):
1545 """Check the given parameters for validity.
1547 @type hvparams: dict
1548 @param hvparams: dictionary with parameter names/value
1549 @raise errors.HypervisorError: when a parameter is not valid
1552 super(KVMHypervisor, cls).CheckParameterSyntax(hvparams)
1554 kernel_path = hvparams[constants.HV_KERNEL_PATH]
1556 if not hvparams[constants.HV_ROOT_PATH]:
1557 raise errors.HypervisorError("Need a root partition for the instance,"
1558 " if a kernel is defined")
1560 if (hvparams[constants.HV_VNC_X509_VERIFY] and
1561 not hvparams[constants.HV_VNC_X509]):
1562 raise errors.HypervisorError("%s must be defined, if %s is" %
1563 (constants.HV_VNC_X509,
1564 constants.HV_VNC_X509_VERIFY))
1566 boot_order = hvparams[constants.HV_BOOT_ORDER]
1567 if (boot_order == constants.HT_BO_CDROM and
1568 not hvparams[constants.HV_CDROM_IMAGE_PATH]):
1569 raise errors.HypervisorError("Cannot boot from cdrom without an"
1572 security_model = hvparams[constants.HV_SECURITY_MODEL]
1573 if security_model == constants.HT_SM_USER:
1574 if not hvparams[constants.HV_SECURITY_DOMAIN]:
1575 raise errors.HypervisorError("A security domain (user to run kvm as)"
1576 " must be specified")
1577 elif (security_model == constants.HT_SM_NONE or
1578 security_model == constants.HT_SM_POOL):
1579 if hvparams[constants.HV_SECURITY_DOMAIN]:
1580 raise errors.HypervisorError("Cannot have a security domain when the"
1581 " security model is 'none' or 'pool'")
1583 spice_bind = hvparams[constants.HV_KVM_SPICE_BIND]
1584 spice_ip_version = hvparams[constants.HV_KVM_SPICE_IP_VERSION]
1585 spice_password_file = hvparams[constants.HV_KVM_SPICE_PASSWORD_FILE]
1587 if spice_ip_version != constants.IFACE_NO_IP_VERSION_SPECIFIED:
1588 # if an IP version is specified, the spice_bind parameter must be an
1590 if (netutils.IP4Address.IsValid(spice_bind) and
1591 spice_ip_version != constants.IP4_VERSION):
1592 raise errors.HypervisorError("spice: got an IPv4 address (%s), but"
1593 " the specified IP version is %s" %
1594 (spice_bind, spice_ip_version))
1596 if (netutils.IP6Address.IsValid(spice_bind) and
1597 spice_ip_version != constants.IP6_VERSION):
1598 raise errors.HypervisorError("spice: got an IPv6 address (%s), but"
1599 " the specified IP version is %s" %
1600 (spice_bind, spice_ip_version))
1602 if spice_ip_version:
1603 raise errors.HypervisorError("spice: the %s option is useless"
1605 (constants.HV_KVM_SPICE_IP_VERSION,
1606 constants.HV_KVM_SPICE_BIND))
1607 if spice_password_file:
1608 raise errors.HypervisorError("spice: the %s option is useless"
1610 (constants.HV_KVM_SPICE_PASSWORD_FILE,
1611 constants.HV_KVM_SPICE_BIND))
1614 def ValidateParameters(cls, hvparams):
1615 """Check the given parameters for validity.
1617 @type hvparams: dict
1618 @param hvparams: dictionary with parameter names/value
1619 @raise errors.HypervisorError: when a parameter is not valid
1622 super(KVMHypervisor, cls).ValidateParameters(hvparams)
1624 security_model = hvparams[constants.HV_SECURITY_MODEL]
1625 if security_model == constants.HT_SM_USER:
1626 username = hvparams[constants.HV_SECURITY_DOMAIN]
1628 pwd.getpwnam(username)
1630 raise errors.HypervisorError("Unknown security domain user %s"
1633 spice_bind = hvparams[constants.HV_KVM_SPICE_BIND]
1635 # only one of VNC and SPICE can be used currently.
1636 if hvparams[constants.HV_VNC_BIND_ADDRESS]:
1637 raise errors.HypervisorError("both SPICE and VNC are configured, but"
1638 " only one of them can be used at a"
1641 # KVM version should be >= 0.14.0
1642 _, v_major, v_min, _ = cls._GetKVMVersion()
1643 if (v_major, v_min) < (0, 14):
1644 raise errors.HypervisorError("spice is configured, but it is not"
1645 " available in versions of KVM < 0.14")
1647 # if spice_bind is not an IP address, it must be a valid interface
1648 bound_to_addr = (netutils.IP4Address.IsValid(spice_bind)
1649 or netutils.IP6Address.IsValid(spice_bind))
1650 if not bound_to_addr and not netutils.IsValidInterface(spice_bind):
1651 raise errors.HypervisorError("spice: the %s parameter must be either"
1652 " a valid IP address or interface name" %
1653 constants.HV_KVM_SPICE_BIND)
1656 def PowercycleNode(cls):
1657 """KVM powercycle, just a wrapper over Linux powercycle.
1660 cls.LinuxPowercycle()