debuggers.hg

view tools/python/xen/xend/XendDomainInfo.py @ 16702:9fe92a88912b

Fix xend xenstore handling.

xend can get into a situation where two processes are attempting to
interact with the xenstore socket, with disastrous results. Fix the
two bad users of xstransact, add a big warning, and fix the destructor
so future mistakes will be detected earlier.

Signed-off-by: John Levon <john.levon@sun.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Dec 27 12:27:34 2007 +0000 (2007-12-27)
parents 9b37cabe0485
children 3f26758bcc02
line source
1 #===========================================================================
2 # This library is free software; you can redistribute it and/or
3 # modify it under the terms of version 2.1 of the GNU Lesser General Public
4 # License as published by the Free Software Foundation.
5 #
6 # This library is distributed in the hope that it will be useful,
7 # but WITHOUT ANY WARRANTY; without even the implied warranty of
8 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
9 # Lesser General Public License for more details.
10 #
11 # You should have received a copy of the GNU Lesser General Public
12 # License along with this library; if not, write to the Free Software
13 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
14 #============================================================================
15 # Copyright (C) 2004, 2005 Mike Wray <mike.wray@hp.com>
16 # Copyright (C) 2005-2007 XenSource Ltd
17 #============================================================================
19 """Representation of a single domain.
20 Includes support for domain construction, using
21 open-ended configurations.
23 Author: Mike Wray <mike.wray@hp.com>
25 """
27 import logging
28 import time
29 import threading
30 import re
31 import copy
32 import os
33 import traceback
34 from types import StringTypes
36 import xen.lowlevel.xc
37 from xen.util import asserts
38 from xen.util.blkif import blkdev_uname_to_file, blkdev_uname_to_taptype
39 import xen.util.xsm.xsm as security
41 from xen.xend import balloon, sxp, uuid, image, arch, osdep
42 from xen.xend import XendOptions, XendNode, XendConfig
44 from xen.xend.XendConfig import scrub_password
45 from xen.xend.XendBootloader import bootloader, bootloader_tidy
46 from xen.xend.XendError import XendError, VmError
47 from xen.xend.XendDevices import XendDevices
48 from xen.xend.XendTask import XendTask
49 from xen.xend.xenstore.xstransact import xstransact, complete
50 from xen.xend.xenstore.xsutil import GetDomainPath, IntroduceDomain, ResumeDomain
51 from xen.xend.xenstore.xswatch import xswatch
52 from xen.xend.XendConstants import *
53 from xen.xend.XendAPIConstants import *
55 from xen.xend.XendVMMetrics import XendVMMetrics
57 MIGRATE_TIMEOUT = 30.0
58 BOOTLOADER_LOOPBACK_DEVICE = '/dev/xvdp'
60 xc = xen.lowlevel.xc.xc()
61 xoptions = XendOptions.instance()
63 log = logging.getLogger("xend.XendDomainInfo")
64 #log.setLevel(logging.TRACE)
67 def create(config):
68 """Creates and start a VM using the supplied configuration.
70 @param config: A configuration object involving lists of tuples.
71 @type config: list of lists, eg ['vm', ['image', 'xen.gz']]
73 @rtype: XendDomainInfo
74 @return: An up and running XendDomainInfo instance
75 @raise VmError: Invalid configuration or failure to start.
76 """
77 from xen.xend import XendDomain
78 domconfig = XendConfig.XendConfig(sxp_obj = config)
79 othervm = XendDomain.instance().domain_lookup_nr(domconfig["name_label"])
80 if othervm is None or othervm.domid is None:
81 othervm = XendDomain.instance().domain_lookup_nr(domconfig["uuid"])
82 if othervm is not None and othervm.domid is not None:
83 raise VmError("Domain '%s' already exists with ID '%d'" % (domconfig["name_label"], othervm.domid))
84 log.debug("XendDomainInfo.create(%s)", scrub_password(config))
85 vm = XendDomainInfo(domconfig)
86 try:
87 vm.start()
88 except:
89 log.exception('Domain construction failed')
90 vm.destroy()
91 raise
93 return vm
95 def create_from_dict(config_dict):
96 """Creates and start a VM using the supplied configuration.
98 @param config_dict: An configuration dictionary.
100 @rtype: XendDomainInfo
101 @return: An up and running XendDomainInfo instance
102 @raise VmError: Invalid configuration or failure to start.
103 """
105 log.debug("XendDomainInfo.create_from_dict(%s)",
106 scrub_password(config_dict))
107 vm = XendDomainInfo(XendConfig.XendConfig(xapi = config_dict))
108 try:
109 vm.start()
110 except:
111 log.exception('Domain construction failed')
112 vm.destroy()
113 raise
114 return vm
116 def recreate(info, priv):
117 """Create the VM object for an existing domain. The domain must not
118 be dying, as the paths in the store should already have been removed,
119 and asking us to recreate them causes problems.
121 @param xeninfo: Parsed configuration
122 @type xeninfo: Dictionary
123 @param priv: Is a privileged domain (Dom 0)
124 @type priv: bool
126 @rtype: XendDomainInfo
127 @return: A up and running XendDomainInfo instance
128 @raise VmError: Invalid configuration.
129 @raise XendError: Errors with configuration.
130 """
132 log.debug("XendDomainInfo.recreate(%s)", scrub_password(info))
134 assert not info['dying']
136 xeninfo = XendConfig.XendConfig(dominfo = info)
137 xeninfo['is_control_domain'] = priv
138 xeninfo['is_a_template'] = False
139 domid = xeninfo['domid']
140 uuid1 = uuid.fromString(xeninfo['uuid'])
141 needs_reinitialising = False
143 dompath = GetDomainPath(domid)
144 if not dompath:
145 raise XendError('No domain path in store for existing '
146 'domain %d' % domid)
148 log.info("Recreating domain %d, UUID %s. at %s" %
149 (domid, xeninfo['uuid'], dompath))
151 # need to verify the path and uuid if not Domain-0
152 # if the required uuid and vm aren't set, then that means
153 # we need to recreate the dom with our own values
154 #
155 # NOTE: this is probably not desirable, really we should just
156 # abort or ignore, but there may be cases where xenstore's
157 # entry disappears (eg. xenstore-rm /)
158 #
159 try:
160 vmpath = xstransact.Read(dompath, "vm")
161 if not vmpath:
162 if not priv:
163 log.warn('/local/domain/%d/vm is missing. recreate is '
164 'confused, trying our best to recover' % domid)
165 needs_reinitialising = True
166 raise XendError('reinit')
168 uuid2_str = xstransact.Read(vmpath, "uuid")
169 if not uuid2_str:
170 log.warn('%s/uuid/ is missing. recreate is confused, '
171 'trying our best to recover' % vmpath)
172 needs_reinitialising = True
173 raise XendError('reinit')
175 uuid2 = uuid.fromString(uuid2_str)
176 if uuid1 != uuid2:
177 log.warn('UUID in /vm does not match the UUID in /dom/%d.'
178 'Trying out best to recover' % domid)
179 needs_reinitialising = True
180 except XendError:
181 pass # our best shot at 'goto' in python :)
183 vm = XendDomainInfo(xeninfo, domid, dompath, augment = True, priv = priv,
184 vmpath = vmpath)
186 if needs_reinitialising:
187 vm._recreateDom()
188 vm._removeVm()
189 vm._storeVmDetails()
190 vm._storeDomDetails()
192 vm.image = image.create(vm, vm.info)
193 vm.image.recreate()
195 vm._registerWatches()
196 vm.refreshShutdown(xeninfo)
198 # register the domain in the list
199 from xen.xend import XendDomain
200 XendDomain.instance().add_domain(vm)
202 return vm
205 def restore(config):
206 """Create a domain and a VM object to do a restore.
208 @param config: Domain SXP configuration
209 @type config: list of lists. (see C{create})
211 @rtype: XendDomainInfo
212 @return: A up and running XendDomainInfo instance
213 @raise VmError: Invalid configuration or failure to start.
214 @raise XendError: Errors with configuration.
215 """
217 log.debug("XendDomainInfo.restore(%s)", scrub_password(config))
218 vm = XendDomainInfo(XendConfig.XendConfig(sxp_obj = config),
219 resume = True)
220 try:
221 vm.resume()
222 return vm
223 except:
224 vm.destroy()
225 raise
227 def createDormant(domconfig):
228 """Create a dormant/inactive XenDomainInfo without creating VM.
229 This is for creating instances of persistent domains that are not
230 yet start.
232 @param domconfig: Parsed configuration
233 @type domconfig: XendConfig object
235 @rtype: XendDomainInfo
236 @return: A up and running XendDomainInfo instance
237 @raise XendError: Errors with configuration.
238 """
240 log.debug("XendDomainInfo.createDormant(%s)", scrub_password(domconfig))
242 # domid does not make sense for non-running domains.
243 domconfig.pop('domid', None)
244 vm = XendDomainInfo(domconfig)
245 return vm
247 def domain_by_name(name):
248 """Get domain by name
250 @params name: Name of the domain
251 @type name: string
252 @return: XendDomainInfo or None
253 """
254 from xen.xend import XendDomain
255 return XendDomain.instance().domain_lookup_by_name_nr(name)
258 def shutdown_reason(code):
259 """Get a shutdown reason from a code.
261 @param code: shutdown code
262 @type code: int
263 @return: shutdown reason
264 @rtype: string
265 """
266 return DOMAIN_SHUTDOWN_REASONS.get(code, "?")
268 def dom_get(dom):
269 """Get info from xen for an existing domain.
271 @param dom: domain id
272 @type dom: int
273 @return: info or None
274 @rtype: dictionary
275 """
276 try:
277 domlist = xc.domain_getinfo(dom, 1)
278 if domlist and dom == domlist[0]['domid']:
279 return domlist[0]
280 except Exception, err:
281 # ignore missing domain
282 log.trace("domain_getinfo(%d) failed, ignoring: %s", dom, str(err))
283 return None
286 class XendDomainInfo:
287 """An object represents a domain.
289 @TODO: try to unify dom and domid, they mean the same thing, but
290 xc refers to it as dom, and everywhere else, including
291 xenstore it is domid. The best way is to change xc's
292 python interface.
294 @ivar info: Parsed configuration
295 @type info: dictionary
296 @ivar domid: Domain ID (if VM has started)
297 @type domid: int or None
298 @ivar vmpath: XenStore path to this VM.
299 @type vmpath: string
300 @ivar dompath: XenStore path to this Domain.
301 @type dompath: string
302 @ivar image: Reference to the VM Image.
303 @type image: xen.xend.image.ImageHandler
304 @ivar store_port: event channel to xenstored
305 @type store_port: int
306 @ivar console_port: event channel to xenconsoled
307 @type console_port: int
308 @ivar store_mfn: xenstored mfn
309 @type store_mfn: int
310 @ivar console_mfn: xenconsoled mfn
311 @type console_mfn: int
312 @ivar notes: OS image notes
313 @type notes: dictionary
314 @ivar vmWatch: reference to a watch on the xenstored vmpath
315 @type vmWatch: xen.xend.xenstore.xswatch
316 @ivar shutdownWatch: reference to watch on the xenstored domain shutdown
317 @type shutdownWatch: xen.xend.xenstore.xswatch
318 @ivar shutdownStartTime: UNIX Time when domain started shutting down.
319 @type shutdownStartTime: float or None
320 # @ivar state: Domain state
321 # @type state: enum(DOM_STATE_HALTED, DOM_STATE_RUNNING, ...)
322 @ivar state_updated: lock for self.state
323 @type state_updated: threading.Condition
324 @ivar refresh_shutdown_lock: lock for polling shutdown state
325 @type refresh_shutdown_lock: threading.Condition
326 @ivar _deviceControllers: device controller cache for this domain
327 @type _deviceControllers: dict 'string' to DevControllers
328 """
330 def __init__(self, info, domid = None, dompath = None, augment = False,
331 priv = False, resume = False, vmpath = None):
332 """Constructor for a domain
334 @param info: parsed configuration
335 @type info: dictionary
336 @keyword domid: Set initial domain id (if any)
337 @type domid: int
338 @keyword dompath: Set initial dompath (if any)
339 @type dompath: string
340 @keyword augment: Augment given info with xenstored VM info
341 @type augment: bool
342 @keyword priv: Is a privileged domain (Dom 0)
343 @type priv: bool
344 @keyword resume: Is this domain being resumed?
345 @type resume: bool
346 """
348 self.info = info
349 if domid == None:
350 self.domid = self.info.get('domid')
351 else:
352 self.domid = domid
354 #REMOVE: uuid is now generated in XendConfig
355 #if not self._infoIsSet('uuid'):
356 # self.info['uuid'] = uuid.toString(uuid.create())
358 # Find a unique /vm/<uuid>/<integer> path if not specified.
359 # This avoids conflict between pre-/post-migrate domains when doing
360 # localhost relocation.
361 self.vmpath = vmpath
362 i = 0
363 while self.vmpath == None:
364 self.vmpath = XS_VMROOT + self.info['uuid']
365 if i != 0:
366 self.vmpath = self.vmpath + '-' + str(i)
367 try:
368 if self._readVm("uuid"):
369 self.vmpath = None
370 i = i + 1
371 except:
372 pass
374 self.dompath = dompath
376 self.image = None
377 self.store_port = None
378 self.store_mfn = None
379 self.console_port = None
380 self.console_mfn = None
382 self.native_protocol = None
384 self.vmWatch = None
385 self.shutdownWatch = None
386 self.shutdownStartTime = None
387 self._resume = resume
389 self.state_updated = threading.Condition()
390 self.refresh_shutdown_lock = threading.Condition()
391 self._stateSet(DOM_STATE_HALTED)
393 self._deviceControllers = {}
395 for state in DOM_STATES_OLD:
396 self.info[state] = 0
398 if augment:
399 self._augmentInfo(priv)
401 self._checkName(self.info['name_label'])
403 self.metrics = XendVMMetrics(uuid.createString(), self)
406 #
407 # Public functions available through XMLRPC
408 #
411 def start(self, is_managed = False):
412 """Attempts to start the VM by do the appropriate
413 initialisation if it not started.
414 """
415 from xen.xend import XendDomain
417 if self._stateGet() in (XEN_API_VM_POWER_STATE_HALTED, XEN_API_VM_POWER_STATE_SUSPENDED):
418 try:
419 XendTask.log_progress(0, 30, self._constructDomain)
420 XendTask.log_progress(31, 60, self._initDomain)
422 XendTask.log_progress(61, 70, self._storeVmDetails)
423 XendTask.log_progress(71, 80, self._storeDomDetails)
424 XendTask.log_progress(81, 90, self._registerWatches)
425 XendTask.log_progress(91, 100, self.refreshShutdown)
427 xendomains = XendDomain.instance()
428 xennode = XendNode.instance()
430 # save running configuration if XendDomains believe domain is
431 # persistent
432 if is_managed:
433 xendomains.managed_config_save(self)
435 if xennode.xenschedinfo() == 'credit':
436 xendomains.domain_sched_credit_set(self.getDomid(),
437 self.getWeight(),
438 self.getCap())
439 except:
440 log.exception('VM start failed')
441 self.destroy()
442 raise
443 else:
444 raise XendError('VM already running')
446 def resume(self):
447 """Resumes a domain that has come back from suspension."""
448 state = self._stateGet()
449 if state in (DOM_STATE_SUSPENDED, DOM_STATE_HALTED):
450 try:
451 self._constructDomain()
452 self._storeVmDetails()
453 self._createDevices()
454 self._createChannels()
455 self._storeDomDetails()
456 self._endRestore()
457 except:
458 log.exception('VM resume failed')
459 self.destroy()
460 raise
461 else:
462 raise XendError('VM is not susupened; it is %s'
463 % XEN_API_VM_POWER_STATE[state])
465 def shutdown(self, reason):
466 """Shutdown a domain by signalling this via xenstored."""
467 log.debug('XendDomainInfo.shutdown(%s)', reason)
468 if self._stateGet() in (DOM_STATE_SHUTDOWN, DOM_STATE_HALTED,):
469 raise XendError('Domain cannot be shutdown')
471 if self.domid == 0:
472 raise XendError('Domain 0 cannot be shutdown')
474 if reason not in DOMAIN_SHUTDOWN_REASONS.values():
475 raise XendError('Invalid reason: %s' % reason)
476 self._removeVm('xend/previous_restart_time')
477 self.storeDom("control/shutdown", reason)
479 # HVM domain shuts itself down only if it has PV drivers
480 if self.info.is_hvm():
481 hvm_pvdrv = xc.hvm_get_param(self.domid, HVM_PARAM_CALLBACK_IRQ)
482 if not hvm_pvdrv:
483 code = REVERSE_DOMAIN_SHUTDOWN_REASONS[reason]
484 xc.domain_destroy_hook(self.domid)
485 log.info("HVM save:remote shutdown dom %d!", self.domid)
486 xc.domain_shutdown(self.domid, code)
488 def pause(self):
489 """Pause domain
491 @raise XendError: Failed pausing a domain
492 """
493 try:
494 xc.domain_pause(self.domid)
495 self._stateSet(DOM_STATE_PAUSED)
496 except Exception, ex:
497 log.exception(ex)
498 raise XendError("Domain unable to be paused: %s" % str(ex))
500 def unpause(self):
501 """Unpause domain
503 @raise XendError: Failed unpausing a domain
504 """
505 try:
506 xc.domain_unpause(self.domid)
507 self._stateSet(DOM_STATE_RUNNING)
508 except Exception, ex:
509 log.exception(ex)
510 raise XendError("Domain unable to be unpaused: %s" % str(ex))
512 def send_sysrq(self, key):
513 """ Send a Sysrq equivalent key via xenstored."""
514 if self._stateGet() not in (DOM_STATE_RUNNING, DOM_STATE_PAUSED):
515 raise XendError("Domain '%s' is not started" % self.info['name_label'])
517 asserts.isCharConvertible(key)
518 self.storeDom("control/sysrq", '%c' % key)
520 def device_create(self, dev_config):
521 """Create a new device.
523 @param dev_config: device configuration
524 @type dev_config: SXP object (parsed config)
525 """
526 log.debug("XendDomainInfo.device_create: %s" % scrub_password(dev_config))
527 dev_type = sxp.name(dev_config)
528 dev_uuid = self.info.device_add(dev_type, cfg_sxp = dev_config)
529 dev_config_dict = self.info['devices'][dev_uuid][1]
530 log.debug("XendDomainInfo.device_create: %s" % scrub_password(dev_config_dict))
532 if self.domid is not None:
533 try:
534 dev_config_dict['devid'] = devid = \
535 self._createDevice(dev_type, dev_config_dict)
536 self._waitForDevice(dev_type, devid)
537 except VmError, ex:
538 raise ex
539 else:
540 devid = None
542 xen.xend.XendDomain.instance().managed_config_save(self)
543 return self.getDeviceController(dev_type).sxpr(devid)
545 def device_configure(self, dev_sxp, devid = None):
546 """Configure an existing device.
548 @param dev_config: device configuration
549 @type dev_config: SXP object (parsed config)
550 @param devid: device id
551 @type devid: int
552 @return: Returns True if successfully updated device
553 @rtype: boolean
554 """
556 # convert device sxp to a dict
557 dev_class = sxp.name(dev_sxp)
558 dev_config = {}
559 for opt_val in dev_sxp[1:]:
560 try:
561 dev_config[opt_val[0]] = opt_val[1]
562 except IndexError:
563 pass
565 # use DevController.reconfigureDevice to change device config
566 dev_control = self.getDeviceController(dev_class)
567 dev_uuid = dev_control.reconfigureDevice(devid, dev_config)
569 # update XendConfig with new device info
570 if dev_uuid:
571 self.info.device_update(dev_uuid, dev_sxp)
573 return True
575 def waitForDevices(self):
576 """Wait for this domain's configured devices to connect.
578 @raise VmError: if any device fails to initialise.
579 """
580 for devclass in XendDevices.valid_devices():
581 self.getDeviceController(devclass).waitForDevices()
583 def destroyDevice(self, deviceClass, devid, force = False, rm_cfg = False):
584 log.debug("XendDomainInfo.destroyDevice: deviceClass = %s, device = %s",
585 deviceClass, devid)
587 if rm_cfg:
588 # Convert devid to device number. A device number is
589 # needed to remove its configuration.
590 dev = self.getDeviceController(deviceClass).convertToDeviceNumber(devid)
592 # Save current sxprs. A device number and a backend
593 # path are needed to remove its configuration but sxprs
594 # do not have those after calling destroyDevice.
595 sxprs = self.getDeviceSxprs(deviceClass)
597 rc = None
598 if self.domid is not None:
599 rc = self.getDeviceController(deviceClass).destroyDevice(devid, force)
600 if not force and rm_cfg:
601 # The backend path, other than the device itself,
602 # has to be passed because its accompanied frontend
603 # path may be void until its removal is actually
604 # issued. It is probable because destroyDevice is
605 # issued first.
606 for dev_num, dev_info in sxprs:
607 dev_num = int(dev_num)
608 if dev_num == dev:
609 for x in dev_info:
610 if x[0] == 'backend':
611 backend = x[1]
612 break
613 break
614 self._waitForDevice_destroy(deviceClass, devid, backend)
616 if rm_cfg:
617 if deviceClass == 'vif':
618 if self.domid is not None:
619 for dev_num, dev_info in sxprs:
620 dev_num = int(dev_num)
621 if dev_num == dev:
622 for x in dev_info:
623 if x[0] == 'mac':
624 mac = x[1]
625 break
626 break
627 dev_info = self._getDeviceInfo_vif(mac)
628 else:
629 _, dev_info = sxprs[dev]
630 else: # 'vbd' or 'tap'
631 dev_info = self._getDeviceInfo_vbd(dev)
632 # To remove the UUID of the device from refs,
633 # deviceClass must be always 'vbd'.
634 deviceClass = 'vbd'
635 if dev_info is None:
636 raise XendError("Device %s is not defined" % devid)
638 dev_uuid = sxp.child_value(dev_info, 'uuid')
639 del self.info['devices'][dev_uuid]
640 self.info['%s_refs' % deviceClass].remove(dev_uuid)
641 xen.xend.XendDomain.instance().managed_config_save(self)
643 return rc
645 def getDeviceSxprs(self, deviceClass):
646 if self._stateGet() in (DOM_STATE_RUNNING, DOM_STATE_PAUSED):
647 return self.getDeviceController(deviceClass).sxprs()
648 else:
649 sxprs = []
650 dev_num = 0
651 for dev_type, dev_info in self.info.all_devices_sxpr():
652 if dev_type == deviceClass:
653 sxprs.append([dev_num, dev_info])
654 dev_num += 1
655 return sxprs
657 def getBlockDeviceClass(self, devid):
658 # To get a device number from the devid,
659 # we temporarily use the device controller of VBD.
660 dev = self.getDeviceController('vbd').convertToDeviceNumber(devid)
661 dev_info = self._getDeviceInfo_vbd(dev)
662 if dev_info:
663 return dev_info[0]
665 def _getDeviceInfo_vif(self, mac):
666 for dev_type, dev_info in self.info.all_devices_sxpr():
667 if dev_type != 'vif':
668 continue
669 if mac == sxp.child_value(dev_info, 'mac'):
670 return dev_info
672 def _getDeviceInfo_vbd(self, devid):
673 for dev_type, dev_info in self.info.all_devices_sxpr():
674 if dev_type != 'vbd' and dev_type != 'tap':
675 continue
676 dev = sxp.child_value(dev_info, 'dev')
677 dev = dev.split(':')[0]
678 dev = self.getDeviceController(dev_type).convertToDeviceNumber(dev)
679 if devid == dev:
680 return dev_info
683 def setMemoryTarget(self, target):
684 """Set the memory target of this domain.
685 @param target: In MiB.
686 """
687 log.debug("Setting memory target of domain %s (%s) to %d MiB.",
688 self.info['name_label'], str(self.domid), target)
690 MiB = 1024 * 1024
691 self._safe_set_memory('memory_dynamic_min', target * MiB)
692 self._safe_set_memory('memory_dynamic_max', target * MiB)
694 if self.domid >= 0:
695 self.storeVm("memory", target)
696 self.storeDom("memory/target", target << 10)
697 xen.xend.XendDomain.instance().managed_config_save(self)
699 def setMemoryMaximum(self, limit):
700 """Set the maximum memory limit of this domain
701 @param limit: In MiB.
702 """
703 log.debug("Setting memory maximum of domain %s (%s) to %d MiB.",
704 self.info['name_label'], str(self.domid), limit)
706 if limit <= 0:
707 raise XendError('Invalid memory size')
709 MiB = 1024 * 1024
710 self._safe_set_memory('memory_static_max', limit * MiB)
712 if self.domid >= 0:
713 maxmem = int(limit) * 1024
714 try:
715 return xc.domain_setmaxmem(self.domid, maxmem)
716 except Exception, ex:
717 raise XendError(str(ex))
718 xen.xend.XendDomain.instance().managed_config_save(self)
721 def getVCPUInfo(self):
722 try:
723 # We include the domain name and ID, to help xm.
724 sxpr = ['domain',
725 ['domid', self.domid],
726 ['name', self.info['name_label']],
727 ['vcpu_count', self.info['VCPUs_max']]]
729 for i in range(0, self.info['VCPUs_max']):
730 if self.domid is not None:
731 info = xc.vcpu_getinfo(self.domid, i)
733 sxpr.append(['vcpu',
734 ['number', i],
735 ['online', info['online']],
736 ['blocked', info['blocked']],
737 ['running', info['running']],
738 ['cpu_time', info['cpu_time'] / 1e9],
739 ['cpu', info['cpu']],
740 ['cpumap', info['cpumap']]])
741 else:
742 sxpr.append(['vcpu',
743 ['number', i],
744 ['online', 0],
745 ['blocked', 0],
746 ['running', 0],
747 ['cpu_time', 0.0],
748 ['cpu', -1],
749 ['cpumap', self.info['cpus'] and \
750 self.info['cpus'] or range(64)]])
752 return sxpr
754 except RuntimeError, exn:
755 raise XendError(str(exn))
758 def getDomInfo(self):
759 return dom_get(self.domid)
761 #
762 # internal functions ... TODO: re-categorised
763 #
765 def _augmentInfo(self, priv):
766 """Augment self.info, as given to us through L{recreate}, with
767 values taken from the store. This recovers those values known
768 to xend but not to the hypervisor.
769 """
770 augment_entries = XendConfig.LEGACY_XENSTORE_VM_PARAMS[:]
771 if priv:
772 augment_entries.remove('memory')
773 augment_entries.remove('maxmem')
774 augment_entries.remove('vcpus')
775 augment_entries.remove('vcpu_avail')
777 vm_config = self._readVMDetails([(k, XendConfig.LEGACY_CFG_TYPES[k])
778 for k in augment_entries])
780 # make returned lists into a dictionary
781 vm_config = dict(zip(augment_entries, vm_config))
783 for arg in augment_entries:
784 val = vm_config[arg]
785 if val != None:
786 if arg in XendConfig.LEGACY_CFG_TO_XENAPI_CFG:
787 xapiarg = XendConfig.LEGACY_CFG_TO_XENAPI_CFG[arg]
788 self.info[xapiarg] = val
789 elif arg == "memory":
790 self.info["static_memory_min"] = val
791 elif arg == "maxmem":
792 self.info["static_memory_max"] = val
793 else:
794 self.info[arg] = val
796 # For dom0, we ignore any stored value for the vcpus fields, and
797 # read the current value from Xen instead. This allows boot-time
798 # settings to take precedence over any entries in the store.
799 if priv:
800 xeninfo = dom_get(self.domid)
801 self.info['VCPUs_max'] = xeninfo['online_vcpus']
802 self.info['vcpu_avail'] = (1 << xeninfo['online_vcpus']) - 1
804 # read image value
805 image_sxp = self._readVm('image')
806 if image_sxp:
807 self.info.update_with_image_sxp(sxp.from_string(image_sxp))
809 # read devices
810 devices = []
811 for devclass in XendDevices.valid_devices():
812 devconfig = self.getDeviceController(devclass).configurations()
813 if devconfig:
814 devices.extend(devconfig)
816 if not self.info['devices'] and devices is not None:
817 for device in devices:
818 self.info.device_add(device[0], cfg_sxp = device)
820 self._update_consoles()
822 def _update_consoles(self, transaction = None):
823 if self.domid == None or self.domid == 0:
824 return
826 # Update VT100 port if it exists
827 if transaction is None:
828 self.console_port = self.readDom('console/port')
829 else:
830 self.console_port = self.readDomTxn(transaction, 'console/port')
831 if self.console_port is not None:
832 serial_consoles = self.info.console_get_all('vt100')
833 if not serial_consoles:
834 cfg = self.info.console_add('vt100', self.console_port)
835 self._createDevice('console', cfg)
836 else:
837 console_uuid = serial_consoles[0].get('uuid')
838 self.info.console_update(console_uuid, 'location',
839 self.console_port)
842 # Update VNC port if it exists and write to xenstore
843 if transaction is None:
844 vnc_port = self.readDom('console/vnc-port')
845 else:
846 vnc_port = self.readDomTxn(transaction, 'console/vnc-port')
847 if vnc_port is not None:
848 for dev_uuid, (dev_type, dev_info) in self.info['devices'].items():
849 if dev_type == 'vfb':
850 old_location = dev_info.get('location')
851 listen_host = dev_info.get('vnclisten', 'localhost')
852 new_location = '%s:%s' % (listen_host, str(vnc_port))
853 if old_location == new_location:
854 break
856 dev_info['location'] = new_location
857 self.info.device_update(dev_uuid, cfg_xenapi = dev_info)
858 vfb_ctrl = self.getDeviceController('vfb')
859 vfb_ctrl.reconfigureDevice(0, dev_info)
860 break
862 #
863 # Function to update xenstore /vm/*
864 #
866 def _readVm(self, *args):
867 return xstransact.Read(self.vmpath, *args)
869 def _writeVm(self, *args):
870 return xstransact.Write(self.vmpath, *args)
872 def _removeVm(self, *args):
873 return xstransact.Remove(self.vmpath, *args)
875 def _gatherVm(self, *args):
876 return xstransact.Gather(self.vmpath, *args)
878 def storeVm(self, *args):
879 return xstransact.Store(self.vmpath, *args)
882 def _readVmTxn(self, transaction, *args):
883 paths = map(lambda x: self.vmpath + "/" + x, args)
884 return transaction.read(*paths)
886 def _writeVmTxn(self, transaction, *args):
887 paths = map(lambda x: self.vmpath + "/" + x, args)
888 return transaction.write(*paths)
890 def _removeVmTxn(self, transaction, *args):
891 paths = map(lambda x: self.vmpath + "/" + x, args)
892 return transaction.remove(*paths)
894 def _gatherVmTxn(self, transaction, *args):
895 paths = map(lambda x: self.vmpath + "/" + x, args)
896 return transaction.gather(paths)
898 def storeVmTxn(self, transaction, *args):
899 paths = map(lambda x: self.vmpath + "/" + x, args)
900 return transaction.store(*paths)
902 #
903 # Function to update xenstore /dom/*
904 #
906 def readDom(self, *args):
907 return xstransact.Read(self.dompath, *args)
909 def gatherDom(self, *args):
910 return xstransact.Gather(self.dompath, *args)
912 def _writeDom(self, *args):
913 return xstransact.Write(self.dompath, *args)
915 def _removeDom(self, *args):
916 return xstransact.Remove(self.dompath, *args)
918 def storeDom(self, *args):
919 return xstransact.Store(self.dompath, *args)
922 def readDomTxn(self, transaction, *args):
923 paths = map(lambda x: self.dompath + "/" + x, args)
924 return transaction.read(*paths)
926 def gatherDomTxn(self, transaction, *args):
927 paths = map(lambda x: self.dompath + "/" + x, args)
928 return transaction.gather(*paths)
930 def _writeDomTxn(self, transaction, *args):
931 paths = map(lambda x: self.dompath + "/" + x, args)
932 return transaction.write(*paths)
934 def _removeDomTxn(self, transaction, *args):
935 paths = map(lambda x: self.dompath + "/" + x, args)
936 return transaction.remove(*paths)
938 def storeDomTxn(self, transaction, *args):
939 paths = map(lambda x: self.dompath + "/" + x, args)
940 return transaction.store(*paths)
943 def _recreateDom(self):
944 complete(self.dompath, lambda t: self._recreateDomFunc(t))
946 def _recreateDomFunc(self, t):
947 t.remove()
948 t.mkdir()
949 t.set_permissions({'dom' : self.domid})
950 t.write('vm', self.vmpath)
952 def _storeDomDetails(self):
953 to_store = {
954 'domid': str(self.domid),
955 'vm': self.vmpath,
956 'name': self.info['name_label'],
957 'console/limit': str(xoptions.get_console_limit() * 1024),
958 'memory/target': str(self.info['memory_dynamic_max'] / 1024),
959 }
961 def f(n, v):
962 if v is not None:
963 if type(v) == bool:
964 to_store[n] = v and "1" or "0"
965 else:
966 to_store[n] = str(v)
968 # Figure out if we need to tell xenconsoled to ignore this guest's
969 # console - device model will handle console if it is running
970 constype = "ioemu"
971 if 'device_model' not in self.info['platform']:
972 constype = "xenconsoled"
974 f('console/port', self.console_port)
975 f('console/ring-ref', self.console_mfn)
976 f('console/type', constype)
977 f('store/port', self.store_port)
978 f('store/ring-ref', self.store_mfn)
980 if arch.type == "x86":
981 f('control/platform-feature-multiprocessor-suspend', True)
983 # elfnotes
984 for n, v in self.info.get_notes().iteritems():
985 n = n.lower().replace('_', '-')
986 if n == 'features':
987 for v in v.split('|'):
988 v = v.replace('_', '-')
989 if v.startswith('!'):
990 f('image/%s/%s' % (n, v[1:]), False)
991 else:
992 f('image/%s/%s' % (n, v), True)
993 else:
994 f('image/%s' % n, v)
996 if self.info.has_key('security_label'):
997 f('security_label', self.info['security_label'])
999 to_store.update(self._vcpuDomDetails())
1001 log.debug("Storing domain details: %s", scrub_password(to_store))
1003 self._writeDom(to_store)
1005 def _vcpuDomDetails(self):
1006 def availability(n):
1007 if self.info['vcpu_avail'] & (1 << n):
1008 return 'online'
1009 else:
1010 return 'offline'
1012 result = {}
1013 for v in range(0, self.info['VCPUs_max']):
1014 result["cpu/%d/availability" % v] = availability(v)
1015 return result
1018 # xenstore watches
1021 def _registerWatches(self):
1022 """Register a watch on this VM's entries in the store, and the
1023 domain's control/shutdown node, so that when they are changed
1024 externally, we keep up to date. This should only be called by {@link
1025 #create}, {@link #recreate}, or {@link #restore}, once the domain's
1026 details have been written, but before the new instance is returned."""
1027 self.vmWatch = xswatch(self.vmpath, self._storeChanged)
1028 self.shutdownWatch = xswatch(self.dompath + '/control/shutdown',
1029 self._handleShutdownWatch)
1031 def _storeChanged(self, _):
1032 log.trace("XendDomainInfo.storeChanged");
1034 changed = False
1036 # Check whether values in the configuration have
1037 # changed in Xenstore.
1039 cfg_vm = ['name', 'on_poweroff', 'on_reboot', 'on_crash',
1040 'rtc/timeoffset']
1042 vm_details = self._readVMDetails([(k,XendConfig.LEGACY_CFG_TYPES[k])
1043 for k in cfg_vm])
1045 # convert two lists into a python dictionary
1046 vm_details = dict(zip(cfg_vm, vm_details))
1048 if vm_details['rtc/timeoffset'] == None:
1049 vm_details['rtc/timeoffset'] = "0"
1051 for arg, val in vm_details.items():
1052 if arg in XendConfig.LEGACY_CFG_TO_XENAPI_CFG:
1053 xapiarg = XendConfig.LEGACY_CFG_TO_XENAPI_CFG[arg]
1054 if val != None and val != self.info[xapiarg]:
1055 self.info[xapiarg] = val
1056 changed = True
1057 elif arg == "memory":
1058 if val != None and val != self.info["static_memory_min"]:
1059 self.info["static_memory_min"] = val
1060 changed = True
1061 elif arg == "maxmem":
1062 if val != None and val != self.info["static_memory_max"]:
1063 self.info["static_memory_max"] = val
1064 changed = True
1066 # Check whether image definition has been updated
1067 image_sxp = self._readVm('image')
1068 if image_sxp and image_sxp != sxp.to_string(self.info.image_sxpr()):
1069 self.info.update_with_image_sxp(sxp.from_string(image_sxp))
1070 changed = True
1072 # Check if the rtc offset has changes
1073 if vm_details.get("rtc/timeoffset", "0") != self.info["platform"].get("rtc_timeoffset", "0"):
1074 self.info["platform"]["rtc_timeoffset"] = vm_details.get("rtc/timeoffset", 0)
1075 changed = True
1077 if changed:
1078 # Update the domain section of the store, as this contains some
1079 # parameters derived from the VM configuration.
1080 self._storeDomDetails()
1082 return 1
1084 def _handleShutdownWatch(self, _):
1085 log.debug('XendDomainInfo.handleShutdownWatch')
1087 reason = self.readDom('control/shutdown')
1089 if reason and reason != 'suspend':
1090 sst = self.readDom('xend/shutdown_start_time')
1091 now = time.time()
1092 if sst:
1093 self.shutdownStartTime = float(sst)
1094 timeout = float(sst) + SHUTDOWN_TIMEOUT - now
1095 else:
1096 self.shutdownStartTime = now
1097 self.storeDom('xend/shutdown_start_time', now)
1098 timeout = SHUTDOWN_TIMEOUT
1100 log.trace(
1101 "Scheduling refreshShutdown on domain %d in %ds.",
1102 self.domid, timeout)
1103 threading.Timer(timeout, self.refreshShutdown).start()
1105 return True
1109 # Public Attributes for the VM
1113 def getDomid(self):
1114 return self.domid
1116 def setName(self, name):
1117 self._checkName(name)
1118 self.info['name_label'] = name
1119 self.storeVm("name", name)
1121 def getName(self):
1122 return self.info['name_label']
1124 def getDomainPath(self):
1125 return self.dompath
1127 def getShutdownReason(self):
1128 return self.readDom('control/shutdown')
1130 def getStorePort(self):
1131 """For use only by image.py and XendCheckpoint.py."""
1132 return self.store_port
1134 def getConsolePort(self):
1135 """For use only by image.py and XendCheckpoint.py"""
1136 return self.console_port
1138 def getFeatures(self):
1139 """For use only by image.py."""
1140 return self.info['features']
1142 def getVCpuCount(self):
1143 return self.info['VCPUs_max']
1145 def setVCpuCount(self, vcpus):
1146 if vcpus <= 0:
1147 raise XendError('Invalid VCPUs')
1149 self.info['vcpu_avail'] = (1 << vcpus) - 1
1150 if self.domid >= 0:
1151 self.storeVm('vcpu_avail', self.info['vcpu_avail'])
1152 # update dom differently depending on whether we are adjusting
1153 # vcpu number up or down, otherwise _vcpuDomDetails does not
1154 # disable the vcpus
1155 if self.info['VCPUs_max'] > vcpus:
1156 # decreasing
1157 self._writeDom(self._vcpuDomDetails())
1158 self.info['VCPUs_live'] = vcpus
1159 else:
1160 # same or increasing
1161 self.info['VCPUs_live'] = vcpus
1162 self._writeDom(self._vcpuDomDetails())
1163 else:
1164 self.info['VCPUs_max'] = vcpus
1165 xen.xend.XendDomain.instance().managed_config_save(self)
1166 log.info("Set VCPU count on domain %s to %d", self.info['name_label'],
1167 vcpus)
1169 def getMemoryTarget(self):
1170 """Get this domain's target memory size, in KB."""
1171 return self.info['memory_dynamic_max'] / 1024
1173 def getMemoryMaximum(self):
1174 """Get this domain's maximum memory size, in KB."""
1175 # remember, info now stores memory in bytes
1176 return self.info['memory_static_max'] / 1024
1178 def getResume(self):
1179 return str(self._resume)
1181 def setResume(self, isresume):
1182 self._resume = isresume
1184 def getCap(self):
1185 return self.info['vcpus_params']['cap']
1187 def setCap(self, cpu_cap):
1188 self.info['vcpus_params']['cap'] = cpu_cap
1190 def getWeight(self):
1191 return self.info['vcpus_params']['weight']
1193 def setWeight(self, cpu_weight):
1194 self.info['vcpus_params']['weight'] = cpu_weight
1196 def setResume(self, state):
1197 self._resume = state
1199 def getRestartCount(self):
1200 return self._readVm('xend/restart_count')
1202 def refreshShutdown(self, xeninfo = None):
1203 """ Checks the domain for whether a shutdown is required.
1205 Called from XendDomainInfo and also image.py for HVM images.
1206 """
1208 # If set at the end of this method, a restart is required, with the
1209 # given reason. This restart has to be done out of the scope of
1210 # refresh_shutdown_lock.
1211 restart_reason = None
1213 self.refresh_shutdown_lock.acquire()
1214 try:
1215 if xeninfo is None:
1216 xeninfo = dom_get(self.domid)
1217 if xeninfo is None:
1218 # The domain no longer exists. This will occur if we have
1219 # scheduled a timer to check for shutdown timeouts and the
1220 # shutdown succeeded. It will also occur if someone
1221 # destroys a domain beneath us. We clean up the domain,
1222 # just in case, but we can't clean up the VM, because that
1223 # VM may have migrated to a different domain on this
1224 # machine.
1225 self.cleanupDomain()
1226 self._stateSet(DOM_STATE_HALTED)
1227 return
1229 if xeninfo['dying']:
1230 # Dying means that a domain has been destroyed, but has not
1231 # yet been cleaned up by Xen. This state could persist
1232 # indefinitely if, for example, another domain has some of its
1233 # pages mapped. We might like to diagnose this problem in the
1234 # future, but for now all we do is make sure that it's not us
1235 # holding the pages, by calling cleanupDomain. We can't
1236 # clean up the VM, as above.
1237 self.cleanupDomain()
1238 self._stateSet(DOM_STATE_SHUTDOWN)
1239 return
1241 elif xeninfo['crashed']:
1242 if self.readDom('xend/shutdown_completed'):
1243 # We've seen this shutdown already, but we are preserving
1244 # the domain for debugging. Leave it alone.
1245 return
1247 log.warn('Domain has crashed: name=%s id=%d.',
1248 self.info['name_label'], self.domid)
1249 self._writeVm(LAST_SHUTDOWN_REASON, 'crash')
1251 if xoptions.get_enable_dump():
1252 try:
1253 self.dumpCore()
1254 except XendError:
1255 # This error has been logged -- there's nothing more
1256 # we can do in this context.
1257 pass
1259 restart_reason = 'crash'
1260 self._stateSet(DOM_STATE_HALTED)
1262 elif xeninfo['shutdown']:
1263 self._stateSet(DOM_STATE_SHUTDOWN)
1264 if self.readDom('xend/shutdown_completed'):
1265 # We've seen this shutdown already, but we are preserving
1266 # the domain for debugging. Leave it alone.
1267 return
1269 else:
1270 reason = shutdown_reason(xeninfo['shutdown_reason'])
1272 log.info('Domain has shutdown: name=%s id=%d reason=%s.',
1273 self.info['name_label'], self.domid, reason)
1274 self._writeVm(LAST_SHUTDOWN_REASON, reason)
1276 self._clearRestart()
1278 if reason == 'suspend':
1279 self._stateSet(DOM_STATE_SUSPENDED)
1280 # Don't destroy the domain. XendCheckpoint will do
1281 # this once it has finished. However, stop watching
1282 # the VM path now, otherwise we will end up with one
1283 # watch for the old domain, and one for the new.
1284 self._unwatchVm()
1285 elif reason in ('poweroff', 'reboot'):
1286 restart_reason = reason
1287 else:
1288 self.destroy()
1290 elif self.dompath is None:
1291 # We have yet to manage to call introduceDomain on this
1292 # domain. This can happen if a restore is in progress, or has
1293 # failed. Ignore this domain.
1294 pass
1295 else:
1296 # Domain is alive. If we are shutting it down, log a message
1297 # if it seems unresponsive.
1298 if xeninfo['paused']:
1299 self._stateSet(DOM_STATE_PAUSED)
1300 else:
1301 self._stateSet(DOM_STATE_RUNNING)
1303 if self.shutdownStartTime:
1304 timeout = (SHUTDOWN_TIMEOUT - time.time() +
1305 self.shutdownStartTime)
1306 if (timeout < 0 and not self.readDom('xend/unresponsive')):
1307 log.info(
1308 "Domain shutdown timeout expired: name=%s id=%s",
1309 self.info['name_label'], self.domid)
1310 self.storeDom('xend/unresponsive', 'True')
1311 finally:
1312 self.refresh_shutdown_lock.release()
1314 if restart_reason:
1315 threading.Thread(target = self._maybeRestart,
1316 args = (restart_reason,)).start()
1320 # Restart functions - handling whether we come back up on shutdown.
1323 def _clearRestart(self):
1324 self._removeDom("xend/shutdown_start_time")
1327 def _maybeRestart(self, reason):
1328 # Dispatch to the correct method based upon the configured on_{reason}
1329 # behaviour.
1330 actions = {"destroy" : self.destroy,
1331 "restart" : self._restart,
1332 "preserve" : self._preserve,
1333 "rename-restart" : self._renameRestart}
1335 action_conf = {
1336 'poweroff': 'actions_after_shutdown',
1337 'reboot': 'actions_after_reboot',
1338 'crash': 'actions_after_crash',
1341 action_target = self.info.get(action_conf.get(reason))
1342 func = actions.get(action_target, None)
1343 if func and callable(func):
1344 func()
1345 else:
1346 self.destroy() # default to destroy
1348 def _renameRestart(self):
1349 self._restart(True)
1351 def _restart(self, rename = False):
1352 """Restart the domain after it has exited.
1354 @param rename True if the old domain is to be renamed and preserved,
1355 False if it is to be destroyed.
1356 """
1357 from xen.xend import XendDomain
1359 if self._readVm(RESTART_IN_PROGRESS):
1360 log.error('Xend failed during restart of domain %s. '
1361 'Refusing to restart to avoid loops.',
1362 str(self.domid))
1363 self.destroy()
1364 return
1366 old_domid = self.domid
1367 self._writeVm(RESTART_IN_PROGRESS, 'True')
1369 now = time.time()
1370 rst = self._readVm('xend/previous_restart_time')
1371 if rst:
1372 rst = float(rst)
1373 timeout = now - rst
1374 if timeout < MINIMUM_RESTART_TIME:
1375 log.error(
1376 'VM %s restarting too fast (%f seconds since the last '
1377 'restart). Refusing to restart to avoid loops.',
1378 self.info['name_label'], timeout)
1379 self.destroy()
1380 return
1382 self._writeVm('xend/previous_restart_time', str(now))
1384 try:
1385 if rename:
1386 self._preserveForRestart()
1387 else:
1388 self._unwatchVm()
1389 self.destroyDomain()
1391 # new_dom's VM will be the same as this domain's VM, except where
1392 # the rename flag has instructed us to call preserveForRestart.
1393 # In that case, it is important that we remove the
1394 # RESTART_IN_PROGRESS node from the new domain, not the old one,
1395 # once the new one is available.
1397 new_dom = None
1398 try:
1399 new_dom = XendDomain.instance().domain_create_from_dict(
1400 self.info)
1401 new_dom.waitForDevices()
1402 new_dom.unpause()
1403 rst_cnt = self._readVm('xend/restart_count')
1404 rst_cnt = int(rst_cnt) + 1
1405 self._writeVm('xend/restart_count', str(rst_cnt))
1406 new_dom._removeVm(RESTART_IN_PROGRESS)
1407 except:
1408 if new_dom:
1409 new_dom._removeVm(RESTART_IN_PROGRESS)
1410 new_dom.destroy()
1411 else:
1412 self._removeVm(RESTART_IN_PROGRESS)
1413 raise
1414 except:
1415 log.exception('Failed to restart domain %s.', str(old_domid))
1417 def _preserveForRestart(self):
1418 """Preserve a domain that has been shut down, by giving it a new UUID,
1419 cloning the VM details, and giving it a new name. This allows us to
1420 keep this domain for debugging, but restart a new one in its place
1421 preserving the restart semantics (name and UUID preserved).
1422 """
1424 new_uuid = uuid.createString()
1425 new_name = 'Domain-%s' % new_uuid
1426 log.info("Renaming dead domain %s (%d, %s) to %s (%s).",
1427 self.info['name_label'], self.domid, self.info['uuid'],
1428 new_name, new_uuid)
1429 self._unwatchVm()
1430 self._releaseDevices()
1431 self.info['name_label'] = new_name
1432 self.info['uuid'] = new_uuid
1433 self.vmpath = XS_VMROOT + new_uuid
1434 self._storeVmDetails()
1435 self._preserve()
1438 def _preserve(self):
1439 log.info("Preserving dead domain %s (%d).", self.info['name_label'],
1440 self.domid)
1441 self._unwatchVm()
1442 self.storeDom('xend/shutdown_completed', 'True')
1443 self._stateSet(DOM_STATE_HALTED)
1446 # Debugging ..
1449 def dumpCore(self, corefile = None):
1450 """Create a core dump for this domain.
1452 @raise: XendError if core dumping failed.
1453 """
1455 try:
1456 if not corefile:
1457 this_time = time.strftime("%Y-%m%d-%H%M.%S", time.localtime())
1458 corefile = "/var/xen/dump/%s-%s.%s.core" % (this_time,
1459 self.info['name_label'], self.domid)
1461 if os.path.isdir(corefile):
1462 raise XendError("Cannot dump core in a directory: %s" %
1463 corefile)
1465 xc.domain_dumpcore(self.domid, corefile)
1466 except RuntimeError, ex:
1467 corefile_incomp = corefile+'-incomplete'
1468 os.rename(corefile, corefile_incomp)
1469 log.exception("XendDomainInfo.dumpCore failed: id = %s name = %s",
1470 self.domid, self.info['name_label'])
1471 raise XendError("Failed to dump core: %s" % str(ex))
1474 # Device creation/deletion functions
1477 def _createDevice(self, deviceClass, devConfig):
1478 return self.getDeviceController(deviceClass).createDevice(devConfig)
1480 def _waitForDevice(self, deviceClass, devid):
1481 return self.getDeviceController(deviceClass).waitForDevice(devid)
1483 def _waitForDeviceUUID(self, dev_uuid):
1484 deviceClass, config = self.info['devices'].get(dev_uuid)
1485 self._waitForDevice(deviceClass, config['devid'])
1487 def _waitForDevice_destroy(self, deviceClass, devid, backpath):
1488 return self.getDeviceController(deviceClass).waitForDevice_destroy(
1489 devid, backpath)
1491 def _reconfigureDevice(self, deviceClass, devid, devconfig):
1492 return self.getDeviceController(deviceClass).reconfigureDevice(
1493 devid, devconfig)
1495 def _createDevices(self):
1496 """Create the devices for a vm.
1498 @raise: VmError for invalid devices
1499 """
1500 ordered_refs = self.info.ordered_device_refs()
1501 for dev_uuid in ordered_refs:
1502 devclass, config = self.info['devices'][dev_uuid]
1503 if devclass in XendDevices.valid_devices():
1504 log.info("createDevice: %s : %s" % (devclass, scrub_password(config)))
1505 dev_uuid = config.get('uuid')
1506 devid = self._createDevice(devclass, config)
1508 # store devid in XendConfig for caching reasons
1509 if dev_uuid in self.info['devices']:
1510 self.info['devices'][dev_uuid][1]['devid'] = devid
1512 if self.image:
1513 self.image.createDeviceModel()
1515 def _releaseDevices(self, suspend = False):
1516 """Release all domain's devices. Nothrow guarantee."""
1517 if self.image:
1518 try:
1519 log.debug("Destroying device model")
1520 self.image.destroyDeviceModel()
1521 except Exception, e:
1522 log.exception("Device model destroy failed %s" % str(e))
1523 else:
1524 log.debug("No device model")
1526 log.debug("Releasing devices")
1527 t = xstransact("%s/device" % self.dompath)
1528 try:
1529 for devclass in XendDevices.valid_devices():
1530 for dev in t.list(devclass):
1531 try:
1532 log.debug("Removing %s", dev);
1533 self.destroyDevice(devclass, dev, False);
1534 except:
1535 # Log and swallow any exceptions in removal --
1536 # there's nothing more we can do.
1537 log.exception("Device release failed: %s; %s; %s",
1538 self.info['name_label'], devclass, dev)
1539 finally:
1540 t.abort()
1542 def getDeviceController(self, name):
1543 """Get the device controller for this domain, and if it
1544 doesn't exist, create it.
1546 @param name: device class name
1547 @type name: string
1548 @rtype: subclass of DevController
1549 """
1550 if name not in self._deviceControllers:
1551 devController = XendDevices.make_controller(name, self)
1552 if not devController:
1553 raise XendError("Unknown device type: %s" % name)
1554 self._deviceControllers[name] = devController
1556 return self._deviceControllers[name]
1559 # Migration functions (public)
1562 def testMigrateDevices(self, network, dst):
1563 """ Notify all device about intention of migration
1564 @raise: XendError for a device that cannot be migrated
1565 """
1566 for (n, c) in self.info.all_devices_sxpr():
1567 rc = self.migrateDevice(n, c, network, dst, DEV_MIGRATE_TEST)
1568 if rc != 0:
1569 raise XendError("Device of type '%s' refuses migration." % n)
1571 def migrateDevices(self, network, dst, step, domName=''):
1572 """Notify the devices about migration
1573 """
1574 ctr = 0
1575 try:
1576 for (dev_type, dev_conf) in self.info.all_devices_sxpr():
1577 self.migrateDevice(dev_type, dev_conf, network, dst,
1578 step, domName)
1579 ctr = ctr + 1
1580 except:
1581 for dev_type, dev_conf in self.info.all_devices_sxpr():
1582 if ctr == 0:
1583 step = step - 1
1584 ctr = ctr - 1
1585 self._recoverMigrateDevice(dev_type, dev_conf, network,
1586 dst, step, domName)
1587 raise
1589 def migrateDevice(self, deviceClass, deviceConfig, network, dst,
1590 step, domName=''):
1591 return self.getDeviceController(deviceClass).migrate(deviceConfig,
1592 network, dst, step, domName)
1594 def _recoverMigrateDevice(self, deviceClass, deviceConfig, network,
1595 dst, step, domName=''):
1596 return self.getDeviceController(deviceClass).recover_migrate(
1597 deviceConfig, network, dst, step, domName)
1600 ## private:
1602 def _constructDomain(self):
1603 """Construct the domain.
1605 @raise: VmError on error
1606 """
1608 log.debug('XendDomainInfo.constructDomain')
1610 self.shutdownStartTime = None
1612 hvm = self.info.is_hvm()
1613 if hvm:
1614 info = xc.xeninfo()
1615 if 'hvm' not in info['xen_caps']:
1616 raise VmError("HVM guest support is unavailable: is VT/AMD-V "
1617 "supported by your CPU and enabled in your "
1618 "BIOS?")
1620 # Hack to pre-reserve some memory for initial domain creation.
1621 # There is an implicit memory overhead for any domain creation. This
1622 # overhead is greater for some types of domain than others. For
1623 # example, an x86 HVM domain will have a default shadow-pagetable
1624 # allocation of 1MB. We free up 2MB here to be on the safe side.
1625 balloon.free(2*1024) # 2MB should be plenty
1627 ssidref = 0
1628 if security.on():
1629 ssidref = security.calc_dom_ssidref_from_info(self.info)
1630 if security.has_authorization(ssidref) == False:
1631 raise VmError("VM is not authorized to run.")
1633 try:
1634 self.domid = xc.domain_create(
1635 domid = 0,
1636 ssidref = ssidref,
1637 handle = uuid.fromString(self.info['uuid']),
1638 hvm = int(hvm))
1639 except Exception, e:
1640 # may get here if due to ACM the operation is not permitted
1641 if security.on():
1642 raise VmError('Domain in conflict set with running domain?')
1644 if self.domid < 0:
1645 raise VmError('Creating domain failed: name=%s' %
1646 self.info['name_label'])
1648 self.dompath = GetDomainPath(self.domid)
1650 self._recreateDom()
1652 # Set timer configration of domain
1653 if hvm:
1654 xc.hvm_set_param(self.domid, HVM_PARAM_TIMER_MODE,
1655 long(self.info["platform"].get("timer_mode")))
1657 # Set maximum number of vcpus in domain
1658 xc.domain_max_vcpus(self.domid, int(self.info['VCPUs_max']))
1660 # Test whether the devices can be assigned with VT-d
1661 pci_str = str(self.info["platform"].get("pci"))
1662 if hvm and pci_str:
1663 bdf = xc.test_assign_device(self.domid, pci_str)
1664 if bdf != 0:
1665 bus = (bdf >> 16) & 0xff
1666 devfn = (bdf >> 8) & 0xff
1667 dev = (devfn >> 3) & 0x1f
1668 func = devfn & 0x7
1669 raise VmError("Fail to assign device(%x:%x.%x): maybe VT-d is "
1670 "not enabled, or the device is not exist, or it "
1671 "has already been assigned to other domain"
1672 % (bus, dev, func))
1674 # register the domain in the list
1675 from xen.xend import XendDomain
1676 XendDomain.instance().add_domain(self)
1678 def _introduceDomain(self):
1679 assert self.domid is not None
1680 assert self.store_mfn is not None
1681 assert self.store_port is not None
1683 try:
1684 IntroduceDomain(self.domid, self.store_mfn, self.store_port)
1685 except RuntimeError, exn:
1686 raise XendError(str(exn))
1689 def _initDomain(self):
1690 log.debug('XendDomainInfo.initDomain: %s %s',
1691 self.domid,
1692 self.info['vcpus_params']['weight'])
1694 self._configureBootloader()
1696 try:
1697 self.image = image.create(self, self.info)
1699 if self.info['platform'].get('localtime', 0):
1700 xc.domain_set_time_offset(self.domid)
1702 xc.domain_setcpuweight(self.domid, \
1703 self.info['vcpus_params']['weight'])
1705 # repin domain vcpus if a restricted cpus list is provided
1706 # this is done prior to memory allocation to aide in memory
1707 # distribution for NUMA systems.
1708 if self.info['cpus'] is not None and len(self.info['cpus']) > 0:
1709 for v in range(0, self.info['VCPUs_max']):
1710 xc.vcpu_setaffinity(self.domid, v, self.info['cpus'])
1712 # Use architecture- and image-specific calculations to determine
1713 # the various headrooms necessary, given the raw configured
1714 # values. maxmem, memory, and shadow are all in KiB.
1715 # but memory_static_max etc are all stored in bytes now.
1716 memory = self.image.getRequiredAvailableMemory(
1717 self.info['memory_dynamic_max'] / 1024)
1718 maxmem = self.image.getRequiredAvailableMemory(
1719 self.info['memory_static_max'] / 1024)
1720 shadow = self.image.getRequiredShadowMemory(
1721 self.info['shadow_memory'] * 1024,
1722 self.info['memory_static_max'] / 1024)
1724 log.debug("_initDomain:shadow_memory=0x%x, memory_static_max=0x%x, memory_static_min=0x%x.", self.info['shadow_memory'], self.info['memory_static_max'], self.info['memory_static_min'],)
1725 # Round shadow up to a multiple of a MiB, as shadow_mem_control
1726 # takes MiB and we must not round down and end up under-providing.
1727 shadow = ((shadow + 1023) / 1024) * 1024
1729 # set memory limit
1730 xc.domain_setmaxmem(self.domid, maxmem)
1732 # Make sure there's enough RAM available for the domain
1733 balloon.free(memory + shadow)
1735 # Set up the shadow memory
1736 shadow_cur = xc.shadow_mem_control(self.domid, shadow / 1024)
1737 self.info['shadow_memory'] = shadow_cur
1739 self._createChannels()
1741 channel_details = self.image.createImage()
1743 self.store_mfn = channel_details['store_mfn']
1744 if 'console_mfn' in channel_details:
1745 self.console_mfn = channel_details['console_mfn']
1746 if 'notes' in channel_details:
1747 self.info.set_notes(channel_details['notes'])
1748 if 'native_protocol' in channel_details:
1749 self.native_protocol = channel_details['native_protocol'];
1751 self._introduceDomain()
1753 self._createDevices()
1755 self.image.cleanupBootloading()
1757 self.info['start_time'] = time.time()
1759 self._stateSet(DOM_STATE_RUNNING)
1760 except VmError, exn:
1761 log.exception("XendDomainInfo.initDomain: exception occurred")
1762 if self.image:
1763 self.image.cleanupBootloading()
1764 raise exn
1765 except RuntimeError, exn:
1766 log.exception("XendDomainInfo.initDomain: exception occurred")
1767 if self.image:
1768 self.image.cleanupBootloading()
1769 raise VmError(str(exn))
1772 def cleanupDomain(self):
1773 """Cleanup domain resources; release devices. Idempotent. Nothrow
1774 guarantee."""
1776 self.refresh_shutdown_lock.acquire()
1777 try:
1778 self.unwatchShutdown()
1779 self._releaseDevices()
1780 bootloader_tidy(self)
1782 if self.image:
1783 self.image = None
1785 try:
1786 self._removeDom()
1787 except:
1788 log.exception("Removing domain path failed.")
1790 self._stateSet(DOM_STATE_HALTED)
1791 self.domid = None # Do not push into _stateSet()!
1792 finally:
1793 self.refresh_shutdown_lock.release()
1796 def unwatchShutdown(self):
1797 """Remove the watch on the domain's control/shutdown node, if any.
1798 Idempotent. Nothrow guarantee. Expects to be protected by the
1799 refresh_shutdown_lock."""
1801 try:
1802 try:
1803 if self.shutdownWatch:
1804 self.shutdownWatch.unwatch()
1805 finally:
1806 self.shutdownWatch = None
1807 except:
1808 log.exception("Unwatching control/shutdown failed.")
1810 def waitForShutdown(self):
1811 self.state_updated.acquire()
1812 try:
1813 while self._stateGet() in (DOM_STATE_RUNNING,DOM_STATE_PAUSED):
1814 self.state_updated.wait()
1815 finally:
1816 self.state_updated.release()
1819 # TODO: recategorise - called from XendCheckpoint
1822 def completeRestore(self, store_mfn, console_mfn):
1824 log.debug("XendDomainInfo.completeRestore")
1826 self.store_mfn = store_mfn
1827 self.console_mfn = console_mfn
1829 self._introduceDomain()
1830 self.image = image.create(self, self.info)
1831 if self.image:
1832 self.image.createDeviceModel(True)
1833 self._storeDomDetails()
1834 self._registerWatches()
1835 self.refreshShutdown()
1837 log.debug("XendDomainInfo.completeRestore done")
1840 def _endRestore(self):
1841 self.setResume(False)
1844 # VM Destroy
1847 def _prepare_phantom_paths(self):
1848 # get associated devices to destroy
1849 # build list of phantom devices to be removed after normal devices
1850 plist = []
1851 if self.domid is not None:
1852 t = xstransact("%s/device/vbd" % GetDomainPath(self.domid))
1853 try:
1854 for dev in t.list():
1855 backend_phantom_vbd = xstransact.Read("%s/device/vbd/%s/phantom_vbd" \
1856 % (self.dompath, dev))
1857 if backend_phantom_vbd is not None:
1858 frontend_phantom_vbd = xstransact.Read("%s/frontend" \
1859 % backend_phantom_vbd)
1860 plist.append(backend_phantom_vbd)
1861 plist.append(frontend_phantom_vbd)
1862 finally:
1863 t.abort()
1864 return plist
1866 def _cleanup_phantom_devs(self, plist):
1867 # remove phantom devices
1868 if not plist == []:
1869 time.sleep(2)
1870 for paths in plist:
1871 if paths.find('backend') != -1:
1872 from xen.xend.server import DevController
1873 # Modify online status /before/ updating state (latter is watched by
1874 # drivers, so this ordering avoids a race).
1875 xstransact.Write(paths, 'online', "0")
1876 xstransact.Write(paths, 'state', str(DevController.xenbusState['Closing']))
1877 # force
1878 xstransact.Remove(paths)
1880 def destroy(self):
1881 """Cleanup VM and destroy domain. Nothrow guarantee."""
1883 log.debug("XendDomainInfo.destroy: domid=%s", str(self.domid))
1885 paths = self._prepare_phantom_paths()
1887 self._cleanupVm()
1888 if self.dompath is not None:
1889 self.destroyDomain()
1891 self._cleanup_phantom_devs(paths)
1893 if "transient" in self.info["other_config"] \
1894 and bool(self.info["other_config"]["transient"]):
1895 from xen.xend import XendDomain
1896 XendDomain.instance().domain_delete_by_dominfo(self)
1899 def destroyDomain(self):
1900 log.debug("XendDomainInfo.destroyDomain(%s)", str(self.domid))
1902 paths = self._prepare_phantom_paths()
1904 try:
1905 if self.domid is not None:
1906 xc.domain_destroy_hook(self.domid)
1907 xc.domain_destroy(self.domid)
1908 for state in DOM_STATES_OLD:
1909 self.info[state] = 0
1910 self._stateSet(DOM_STATE_HALTED)
1911 except:
1912 log.exception("XendDomainInfo.destroy: xc.domain_destroy failed.")
1914 from xen.xend import XendDomain
1915 XendDomain.instance().remove_domain(self)
1917 self.cleanupDomain()
1918 self._cleanup_phantom_devs(paths)
1921 def resumeDomain(self):
1922 log.debug("XendDomainInfo.resumeDomain(%s)", str(self.domid))
1924 if self.domid is None:
1925 return
1926 try:
1927 # could also fetch a parsed note from xenstore
1928 fast = self.info.get_notes().get('SUSPEND_CANCEL') and 1 or 0
1929 if not fast:
1930 self._releaseDevices()
1931 self.testDeviceComplete()
1932 self.testvifsComplete()
1933 log.debug("XendDomainInfo.resumeDomain: devices released")
1935 self._resetChannels()
1937 self._removeDom('control/shutdown')
1938 self._removeDom('device-misc/vif/nextDeviceID')
1940 self._createChannels()
1941 self._introduceDomain()
1942 self._storeDomDetails()
1944 self._createDevices()
1945 log.debug("XendDomainInfo.resumeDomain: devices created")
1947 xc.domain_resume(self.domid, fast)
1948 ResumeDomain(self.domid)
1949 except:
1950 log.exception("XendDomainInfo.resume: xc.domain_resume failed on domain %s." % (str(self.domid)))
1951 self.image.resumeDeviceModel()
1952 log.debug("XendDomainInfo.resumeDomain: completed")
1956 # Channels for xenstore and console
1959 def _createChannels(self):
1960 """Create the channels to the domain.
1961 """
1962 self.store_port = self._createChannel()
1963 self.console_port = self._createChannel()
1966 def _createChannel(self):
1967 """Create an event channel to the domain.
1968 """
1969 try:
1970 if self.domid != None:
1971 return xc.evtchn_alloc_unbound(domid = self.domid,
1972 remote_dom = 0)
1973 except:
1974 log.exception("Exception in alloc_unbound(%s)", str(self.domid))
1975 raise
1977 def _resetChannels(self):
1978 """Reset all event channels in the domain.
1979 """
1980 try:
1981 if self.domid != None:
1982 return xc.evtchn_reset(dom = self.domid)
1983 except:
1984 log.exception("Exception in evtcnh_reset(%s)", str(self.domid))
1985 raise
1989 # Bootloader configuration
1992 def _configureBootloader(self):
1993 """Run the bootloader if we're configured to do so."""
1995 blexec = self.info['PV_bootloader']
1996 bootloader_args = self.info['PV_bootloader_args']
1997 kernel = self.info['PV_kernel']
1998 ramdisk = self.info['PV_ramdisk']
1999 args = self.info['PV_args']
2000 boot = self.info['HVM_boot_policy']
2002 if boot:
2003 # HVM booting.
2004 pass
2005 elif not blexec and kernel:
2006 # Boot from dom0. Nothing left to do -- the kernel and ramdisk
2007 # will be picked up by image.py.
2008 pass
2009 else:
2010 # Boot using bootloader
2011 if not blexec or blexec == 'pygrub':
2012 blexec = osdep.pygrub_path
2014 blcfg = None
2015 disks = [x for x in self.info['vbd_refs']
2016 if self.info['devices'][x][1]['bootable']]
2018 if not disks:
2019 msg = "Had a bootloader specified, but no disks are bootable"
2020 log.error(msg)
2021 raise VmError(msg)
2023 devinfo = self.info['devices'][disks[0]]
2024 devtype = devinfo[0]
2025 disk = devinfo[1]['uname']
2027 fn = blkdev_uname_to_file(disk)
2028 taptype = blkdev_uname_to_taptype(disk)
2029 mounted = devtype == 'tap' and taptype != 'aio' and taptype != 'sync' and not os.stat(fn).st_rdev
2030 if mounted:
2031 # This is a file, not a device. pygrub can cope with a
2032 # file if it's raw, but if it's QCOW or other such formats
2033 # used through blktap, then we need to mount it first.
2035 log.info("Mounting %s on %s." %
2036 (fn, BOOTLOADER_LOOPBACK_DEVICE))
2038 vbd = {
2039 'mode': 'RO',
2040 'device': BOOTLOADER_LOOPBACK_DEVICE,
2043 from xen.xend import XendDomain
2044 dom0 = XendDomain.instance().privilegedDomain()
2045 dom0._waitForDeviceUUID(dom0.create_vbd(vbd, disk))
2046 fn = BOOTLOADER_LOOPBACK_DEVICE
2048 try:
2049 blcfg = bootloader(blexec, fn, self, False,
2050 bootloader_args, kernel, ramdisk, args)
2051 finally:
2052 if mounted:
2053 log.info("Unmounting %s from %s." %
2054 (fn, BOOTLOADER_LOOPBACK_DEVICE))
2056 dom0.destroyDevice('tap', BOOTLOADER_LOOPBACK_DEVICE)
2058 if blcfg is None:
2059 msg = "Had a bootloader specified, but can't find disk"
2060 log.error(msg)
2061 raise VmError(msg)
2063 self.info.update_with_image_sxp(blcfg, True)
2067 # VM Functions
2070 def _readVMDetails(self, params):
2071 """Read the specified parameters from the store.
2072 """
2073 try:
2074 return self._gatherVm(*params)
2075 except ValueError:
2076 # One of the int/float entries in params has a corresponding store
2077 # entry that is invalid. We recover, because older versions of
2078 # Xend may have put the entry there (memory/target, for example),
2079 # but this is in general a bad situation to have reached.
2080 log.exception(
2081 "Store corrupted at %s! Domain %d's configuration may be "
2082 "affected.", self.vmpath, self.domid)
2083 return []
2085 def _cleanupVm(self):
2086 """Cleanup VM resources. Idempotent. Nothrow guarantee."""
2088 self._unwatchVm()
2090 try:
2091 self._removeVm()
2092 except:
2093 log.exception("Removing VM path failed.")
2096 def checkLiveMigrateMemory(self):
2097 """ Make sure there's enough memory to migrate this domain """
2098 overhead_kb = 0
2099 if arch.type == "x86":
2100 # 1MB per vcpu plus 4Kib/Mib of RAM. This is higher than
2101 # the minimum that Xen would allocate if no value were given.
2102 overhead_kb = self.info['VCPUs_max'] * 1024 + \
2103 (self.info['memory_static_max'] / 1024 / 1024) * 4
2104 overhead_kb = ((overhead_kb + 1023) / 1024) * 1024
2105 # The domain might already have some shadow memory
2106 overhead_kb -= xc.shadow_mem_control(self.domid) * 1024
2107 if overhead_kb > 0:
2108 balloon.free(overhead_kb)
2110 def _unwatchVm(self):
2111 """Remove the watch on the VM path, if any. Idempotent. Nothrow
2112 guarantee."""
2113 try:
2114 try:
2115 if self.vmWatch:
2116 self.vmWatch.unwatch()
2117 finally:
2118 self.vmWatch = None
2119 except:
2120 log.exception("Unwatching VM path failed.")
2122 def testDeviceComplete(self):
2123 """ For Block IO migration safety we must ensure that
2124 the device has shutdown correctly, i.e. all blocks are
2125 flushed to disk
2126 """
2127 start = time.time()
2128 while True:
2129 test = 0
2130 diff = time.time() - start
2131 for i in self.getDeviceController('vbd').deviceIDs():
2132 test = 1
2133 log.info("Dev %s still active, looping...", i)
2134 time.sleep(0.1)
2136 if test == 0:
2137 break
2138 if diff >= MIGRATE_TIMEOUT:
2139 log.info("Dev still active but hit max loop timeout")
2140 break
2142 def testvifsComplete(self):
2143 """ In case vifs are released and then created for the same
2144 domain, we need to wait the device shut down.
2145 """
2146 start = time.time()
2147 while True:
2148 test = 0
2149 diff = time.time() - start
2150 for i in self.getDeviceController('vif').deviceIDs():
2151 test = 1
2152 log.info("Dev %s still active, looping...", i)
2153 time.sleep(0.1)
2155 if test == 0:
2156 break
2157 if diff >= MIGRATE_TIMEOUT:
2158 log.info("Dev still active but hit max loop timeout")
2159 break
2161 def _storeVmDetails(self):
2162 to_store = {}
2164 for key in XendConfig.LEGACY_XENSTORE_VM_PARAMS:
2165 info_key = XendConfig.LEGACY_CFG_TO_XENAPI_CFG.get(key, key)
2166 if self._infoIsSet(info_key):
2167 to_store[key] = str(self.info[info_key])
2169 if self._infoIsSet("static_memory_min"):
2170 to_store["memory"] = str(self.info["static_memory_min"])
2171 if self._infoIsSet("static_memory_max"):
2172 to_store["maxmem"] = str(self.info["static_memory_max"])
2174 image_sxpr = self.info.image_sxpr()
2175 if image_sxpr:
2176 to_store['image'] = sxp.to_string(image_sxpr)
2178 if not self._readVm('xend/restart_count'):
2179 to_store['xend/restart_count'] = str(0)
2181 log.debug("Storing VM details: %s", scrub_password(to_store))
2183 self._writeVm(to_store)
2184 self._setVmPermissions()
2187 def _setVmPermissions(self):
2188 """Allow the guest domain to read its UUID. We don't allow it to
2189 access any other entry, for security."""
2190 xstransact.SetPermissions('%s/uuid' % self.vmpath,
2191 { 'dom' : self.domid,
2192 'read' : True,
2193 'write' : False })
2196 # Utility functions
2199 def __getattr__(self, name):
2200 if name == "state":
2201 log.warn("Somebody tried to read XendDomainInfo.state... should us _stateGet()!!!")
2202 log.warn("".join(traceback.format_stack()))
2203 return self._stateGet()
2204 else:
2205 raise AttributeError()
2207 def __setattr__(self, name, value):
2208 if name == "state":
2209 log.warn("Somebody tried to set XendDomainInfo.state... should us _stateGet()!!!")
2210 log.warn("".join(traceback.format_stack()))
2211 self._stateSet(value)
2212 else:
2213 self.__dict__[name] = value
2215 def _stateSet(self, state):
2216 self.state_updated.acquire()
2217 try:
2218 # TODO Not sure this is correct...
2219 # _stateGet is live now. Why not fire event
2220 # even when it hasn't changed?
2221 if self._stateGet() != state:
2222 self.state_updated.notifyAll()
2223 import XendAPI
2224 XendAPI.event_dispatch('mod', 'VM', self.info['uuid'],
2225 'power_state')
2226 finally:
2227 self.state_updated.release()
2229 def _stateGet(self):
2230 # Lets try and reconsitute the state from xc
2231 # first lets try and get the domain info
2232 # from xc - this will tell us if the domain
2233 # exists
2234 info = dom_get(self.getDomid())
2235 if info is None or info['shutdown']:
2236 # We are either HALTED or SUSPENDED
2237 # check saved image exists
2238 from xen.xend import XendDomain
2239 managed_config_path = \
2240 XendDomain.instance()._managed_check_point_path( \
2241 self.get_uuid())
2242 if os.path.exists(managed_config_path):
2243 return XEN_API_VM_POWER_STATE_SUSPENDED
2244 else:
2245 return XEN_API_VM_POWER_STATE_HALTED
2246 else:
2247 # We are either RUNNING or PAUSED
2248 if info['paused']:
2249 return XEN_API_VM_POWER_STATE_PAUSED
2250 else:
2251 return XEN_API_VM_POWER_STATE_RUNNING
2253 def _infoIsSet(self, name):
2254 return name in self.info and self.info[name] is not None
2256 def _checkName(self, name):
2257 """Check if a vm name is valid. Valid names contain alphabetic
2258 characters, digits, or characters in '_-.:/+'.
2259 The same name cannot be used for more than one vm at the same time.
2261 @param name: name
2262 @raise: VmError if invalid
2263 """
2264 from xen.xend import XendDomain
2266 if name is None or name == '':
2267 raise VmError('Missing VM Name')
2269 if not re.search(r'^[A-Za-z0-9_\-\.\:\/\+]+$', name):
2270 raise VmError('Invalid VM Name')
2272 dom = XendDomain.instance().domain_lookup_nr(name)
2273 if dom and dom.info['uuid'] != self.info['uuid']:
2274 raise VmError("VM name '%s' already exists%s" %
2275 (name,
2276 dom.domid is not None and
2277 (" as domain %s" % str(dom.domid)) or ""))
2280 def update(self, info = None, refresh = True, transaction = None):
2281 """Update with info from xc.domain_getinfo().
2282 """
2283 log.trace("XendDomainInfo.update(%s) on domain %s", info,
2284 str(self.domid))
2286 if not info:
2287 info = dom_get(self.domid)
2288 if not info:
2289 return
2291 if info["maxmem_kb"] < 0:
2292 info["maxmem_kb"] = XendNode.instance() \
2293 .physinfo_dict()['total_memory'] * 1024
2295 #ssidref field not used any longer
2296 if 'ssidref' in info:
2297 info.pop('ssidref')
2299 # make sure state is reset for info
2300 # TODO: we should eventually get rid of old_dom_states
2302 self.info.update_config(info)
2303 self._update_consoles(transaction)
2305 if refresh:
2306 self.refreshShutdown(info)
2308 log.trace("XendDomainInfo.update done on domain %s: %s",
2309 str(self.domid), self.info)
2311 def sxpr(self, ignore_store = False, legacy_only = True):
2312 result = self.info.to_sxp(domain = self,
2313 ignore_devices = ignore_store,
2314 legacy_only = legacy_only)
2316 #if not ignore_store and self.dompath:
2317 # vnc_port = self.readDom('console/vnc-port')
2318 # if vnc_port is not None:
2319 # result.append(['device',
2320 # ['console', ['vnc-port', str(vnc_port)]]])
2322 return result
2324 # Xen API
2325 # ----------------------------------------------------------------
2327 def get_uuid(self):
2328 dom_uuid = self.info.get('uuid')
2329 if not dom_uuid: # if it doesn't exist, make one up
2330 dom_uuid = uuid.createString()
2331 self.info['uuid'] = dom_uuid
2332 return dom_uuid
2334 def get_memory_static_max(self):
2335 return self.info.get('memory_static_max', 0)
2336 def get_memory_static_min(self):
2337 return self.info.get('memory_static_min', 0)
2338 def get_memory_dynamic_max(self):
2339 return self.info.get('memory_dynamic_max', 0)
2340 def get_memory_dynamic_min(self):
2341 return self.info.get('memory_dynamic_min', 0)
2343 # only update memory-related config values if they maintain sanity
2344 def _safe_set_memory(self, key, newval):
2345 oldval = self.info.get(key, 0)
2346 try:
2347 self.info[key] = newval
2348 self.info._memory_sanity_check()
2349 except Exception, ex:
2350 self.info[key] = oldval
2351 raise
2353 def set_memory_static_max(self, val):
2354 self._safe_set_memory('memory_static_max', val)
2355 def set_memory_static_min(self, val):
2356 self._safe_set_memory('memory_static_min', val)
2357 def set_memory_dynamic_max(self, val):
2358 self._safe_set_memory('memory_dynamic_max', val)
2359 def set_memory_dynamic_min(self, val):
2360 self._safe_set_memory('memory_dynamic_min', val)
2362 def get_vcpus_params(self):
2363 if self.getDomid() is None:
2364 return self.info['vcpus_params']
2366 retval = xc.sched_credit_domain_get(self.getDomid())
2367 return retval
2368 def get_power_state(self):
2369 return XEN_API_VM_POWER_STATE[self._stateGet()]
2370 def get_platform(self):
2371 return self.info.get('platform', {})
2372 def get_pci_bus(self):
2373 return self.info.get('pci_bus', '')
2374 def get_tools_version(self):
2375 return self.info.get('tools_version', {})
2376 def get_metrics(self):
2377 return self.metrics.get_uuid();
2380 def get_security_label(self, xspol=None):
2381 import xen.util.xsm.xsm as security
2382 label = security.get_security_label(self, xspol)
2383 return label
2385 def set_security_label(self, seclab, old_seclab, xspol=None,
2386 xspol_old=None):
2387 """
2388 Set the security label of a domain from its old to
2389 a new value.
2390 @param seclab New security label formatted in the form
2391 <policy type>:<policy name>:<vm label>
2392 @param old_seclab The current security label that the
2393 VM must have.
2394 @param xspol An optional policy under which this
2395 update should be done. If not given,
2396 then the current active policy is used.
2397 @param xspol_old The old policy; only to be passed during
2398 the updating of a policy
2399 @return Returns return code, a string with errors from
2400 the hypervisor's operation, old label of the
2401 domain
2402 """
2403 rc = 0
2404 errors = ""
2405 old_label = ""
2406 new_ssidref = 0
2407 domid = self.getDomid()
2408 res_labels = None
2409 is_policy_update = (xspol_old != None)
2411 from xen.xend.XendXSPolicyAdmin import XSPolicyAdminInstance
2412 from xen.util import xsconstants
2414 state = self._stateGet()
2415 # Relabel only HALTED or RUNNING or PAUSED domains
2416 if domid != 0 and \
2417 state not in \
2418 [ DOM_STATE_HALTED, DOM_STATE_RUNNING, DOM_STATE_PAUSED, \
2419 DOM_STATE_SUSPENDED ]:
2420 log.warn("Relabeling domain not possible in state '%s'" %
2421 DOM_STATES[state])
2422 return (-xsconstants.XSERR_VM_WRONG_STATE, "", "", 0)
2424 # Remove security label. Works only for halted domains
2425 if not seclab or seclab == "":
2426 if state not in [ DOM_STATE_HALTED ]:
2427 return (-xsconstants.XSERR_VM_WRONG_STATE, "", "", 0)
2429 if self.info.has_key('security_label'):
2430 old_label = self.info['security_label']
2431 # Check label against expected one.
2432 if old_label != old_seclab:
2433 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2434 del self.info['security_label']
2435 xen.xend.XendDomain.instance().managed_config_save(self)
2436 return (xsconstants.XSERR_SUCCESS, "", "", 0)
2438 tmp = seclab.split(":")
2439 if len(tmp) != 3:
2440 return (-xsconstants.XSERR_BAD_LABEL_FORMAT, "", "", 0)
2441 typ, policy, label = tmp
2443 poladmin = XSPolicyAdminInstance()
2444 if not xspol:
2445 xspol = poladmin.get_policy_by_name(policy)
2447 if state in [ DOM_STATE_RUNNING, DOM_STATE_PAUSED ]:
2448 #if domain is running or paused try to relabel in hypervisor
2449 if not xspol:
2450 return (-xsconstants.XSERR_POLICY_NOT_LOADED, "", "", 0)
2452 if typ != xspol.get_type_name() or \
2453 policy != xspol.get_name():
2454 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2456 if typ == xsconstants.ACM_POLICY_ID:
2457 new_ssidref = xspol.vmlabel_to_ssidref(label)
2458 if new_ssidref == xsconstants.INVALID_SSIDREF:
2459 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2461 # Check that all used resources are accessible under the
2462 # new label
2463 if not is_policy_update and \
2464 not security.resources_compatible_with_vmlabel(xspol,
2465 self, label):
2466 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2468 #Check label against expected one. Can only do this
2469 # if the policy hasn't changed underneath in the meantime
2470 if xspol_old == None:
2471 old_label = self.get_security_label()
2472 if old_label != old_seclab:
2473 log.info("old_label != old_seclab: %s != %s" %
2474 (old_label, old_seclab))
2475 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2477 # relabel domain in the hypervisor
2478 rc, errors = security.relabel_domains([[domid, new_ssidref]])
2479 log.info("rc from relabeling in HV: %d" % rc)
2480 else:
2481 return (-xsconstants.XSERR_POLICY_TYPE_UNSUPPORTED, "", "", 0)
2483 if rc == 0:
2484 # HALTED, RUNNING or PAUSED
2485 if domid == 0:
2486 if xspol:
2487 self.info['security_label'] = seclab
2488 ssidref = poladmin.set_domain0_bootlabel(xspol, label)
2489 else:
2490 return (-xsconstants.XSERR_POLICY_NOT_LOADED, "", "", 0)
2491 else:
2492 if self.info.has_key('security_label'):
2493 old_label = self.info['security_label']
2494 # Check label against expected one, unless wildcard
2495 if old_label != old_seclab:
2496 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2498 self.info['security_label'] = seclab
2500 try:
2501 xen.xend.XendDomain.instance().managed_config_save(self)
2502 except:
2503 pass
2504 return (rc, errors, old_label, new_ssidref)
2506 def get_on_shutdown(self):
2507 after_shutdown = self.info.get('actions_after_shutdown')
2508 if not after_shutdown or after_shutdown not in XEN_API_ON_NORMAL_EXIT:
2509 return XEN_API_ON_NORMAL_EXIT[-1]
2510 return after_shutdown
2512 def get_on_reboot(self):
2513 after_reboot = self.info.get('actions_after_reboot')
2514 if not after_reboot or after_reboot not in XEN_API_ON_NORMAL_EXIT:
2515 return XEN_API_ON_NORMAL_EXIT[-1]
2516 return after_reboot
2518 def get_on_suspend(self):
2519 # TODO: not supported
2520 after_suspend = self.info.get('actions_after_suspend')
2521 if not after_suspend or after_suspend not in XEN_API_ON_NORMAL_EXIT:
2522 return XEN_API_ON_NORMAL_EXIT[-1]
2523 return after_suspend
2525 def get_on_crash(self):
2526 after_crash = self.info.get('actions_after_crash')
2527 if not after_crash or after_crash not in XEN_API_ON_CRASH_BEHAVIOUR:
2528 return XEN_API_ON_CRASH_BEHAVIOUR[0]
2529 return after_crash
2531 def get_dev_config_by_uuid(self, dev_class, dev_uuid):
2532 """ Get's a device configuration either from XendConfig or
2533 from the DevController.
2535 @param dev_class: device class, either, 'vbd' or 'vif'
2536 @param dev_uuid: device UUID
2538 @rtype: dictionary
2539 """
2540 dev_type, dev_config = self.info['devices'].get(dev_uuid, (None, None))
2542 # shortcut if the domain isn't started because
2543 # the devcontrollers will have no better information
2544 # than XendConfig.
2545 if self._stateGet() in (XEN_API_VM_POWER_STATE_HALTED,):
2546 if dev_config:
2547 return copy.deepcopy(dev_config)
2548 return None
2550 # instead of using dev_class, we use the dev_type
2551 # that is from XendConfig.
2552 controller = self.getDeviceController(dev_type)
2553 if not controller:
2554 return None
2556 all_configs = controller.getAllDeviceConfigurations()
2557 if not all_configs:
2558 return None
2560 updated_dev_config = copy.deepcopy(dev_config)
2561 for _devid, _devcfg in all_configs.items():
2562 if _devcfg.get('uuid') == dev_uuid:
2563 updated_dev_config.update(_devcfg)
2564 updated_dev_config['id'] = _devid
2565 return updated_dev_config
2567 return updated_dev_config
2569 def get_dev_xenapi_config(self, dev_class, dev_uuid):
2570 config = self.get_dev_config_by_uuid(dev_class, dev_uuid)
2571 if not config:
2572 return {}
2574 config['VM'] = self.get_uuid()
2576 if dev_class == 'vif':
2577 if not config.has_key('name'):
2578 config['name'] = config.get('vifname', '')
2579 if not config.has_key('MAC'):
2580 config['MAC'] = config.get('mac', '')
2581 if not config.has_key('type'):
2582 config['type'] = 'paravirtualised'
2583 if not config.has_key('device'):
2584 devid = config.get('id')
2585 if devid != None:
2586 config['device'] = 'eth%d' % devid
2587 else:
2588 config['device'] = ''
2590 if not config.has_key('network'):
2591 try:
2592 bridge = config.get('bridge', None)
2593 if bridge is None:
2594 from xen.util import Brctl
2595 if_to_br = dict([(i,b)
2596 for (b,ifs) in Brctl.get_state().items()
2597 for i in ifs])
2598 vifname = "vif%s.%s" % (self.getDomid(),
2599 config.get('id'))
2600 bridge = if_to_br.get(vifname, None)
2601 config['network'] = \
2602 XendNode.instance().bridge_to_network(
2603 config.get('bridge')).get_uuid()
2604 except Exception:
2605 log.exception('bridge_to_network')
2606 # Ignore this for now -- it may happen if the device
2607 # has been specified using the legacy methods, but at
2608 # some point we're going to have to figure out how to
2609 # handle that properly.
2611 config['MTU'] = 1500 # TODO
2613 if self._stateGet() not in (XEN_API_VM_POWER_STATE_HALTED,):
2614 xennode = XendNode.instance()
2615 rx_bps, tx_bps = xennode.get_vif_util(self.domid, devid)
2616 config['io_read_kbs'] = rx_bps/1024
2617 config['io_write_kbs'] = tx_bps/1024
2618 rx, tx = xennode.get_vif_stat(self.domid, devid)
2619 config['io_total_read_kbs'] = rx/1024
2620 config['io_total_write_kbs'] = tx/1024
2621 else:
2622 config['io_read_kbs'] = 0.0
2623 config['io_write_kbs'] = 0.0
2624 config['io_total_read_kbs'] = 0.0
2625 config['io_total_write_kbs'] = 0.0
2627 config['security_label'] = config.get('security_label', '')
2629 if dev_class == 'vbd':
2631 if self._stateGet() not in (XEN_API_VM_POWER_STATE_HALTED,):
2632 controller = self.getDeviceController(dev_class)
2633 devid, _1, _2 = controller.getDeviceDetails(config)
2634 xennode = XendNode.instance()
2635 rd_blkps, wr_blkps = xennode.get_vbd_util(self.domid, devid)
2636 config['io_read_kbs'] = rd_blkps
2637 config['io_write_kbs'] = wr_blkps
2638 else:
2639 config['io_read_kbs'] = 0.0
2640 config['io_write_kbs'] = 0.0
2642 config['VDI'] = config.get('VDI', '')
2643 config['device'] = config.get('dev', '')
2644 if ':' in config['device']:
2645 vbd_name, vbd_type = config['device'].split(':', 1)
2646 config['device'] = vbd_name
2647 if vbd_type == 'cdrom':
2648 config['type'] = XEN_API_VBD_TYPE[0]
2649 else:
2650 config['type'] = XEN_API_VBD_TYPE[1]
2652 config['driver'] = 'paravirtualised' # TODO
2653 config['image'] = config.get('uname', '')
2655 if config.get('mode', 'r') == 'r':
2656 config['mode'] = 'RO'
2657 else:
2658 config['mode'] = 'RW'
2660 if dev_class == 'vtpm':
2661 if not config.has_key('type'):
2662 config['type'] = 'paravirtualised' # TODO
2663 if not config.has_key('backend'):
2664 config['backend'] = "00000000-0000-0000-0000-000000000000"
2666 return config
2668 def get_dev_property(self, dev_class, dev_uuid, field):
2669 config = self.get_dev_xenapi_config(dev_class, dev_uuid)
2670 try:
2671 return config[field]
2672 except KeyError:
2673 raise XendError('Invalid property for device: %s' % field)
2675 def set_dev_property(self, dev_class, dev_uuid, field, value):
2676 self.info['devices'][dev_uuid][1][field] = value
2678 def get_vcpus_util(self):
2679 vcpu_util = {}
2680 xennode = XendNode.instance()
2681 if 'VCPUs_max' in self.info and self.domid != None:
2682 for i in range(0, self.info['VCPUs_max']):
2683 util = xennode.get_vcpu_util(self.domid, i)
2684 vcpu_util[str(i)] = util
2686 return vcpu_util
2688 def get_consoles(self):
2689 return self.info.get('console_refs', [])
2691 def get_vifs(self):
2692 return self.info.get('vif_refs', [])
2694 def get_vbds(self):
2695 return self.info.get('vbd_refs', [])
2697 def get_vtpms(self):
2698 return self.info.get('vtpm_refs', [])
2700 def create_vbd(self, xenapi_vbd, vdi_image_path):
2701 """Create a VBD using a VDI from XendStorageRepository.
2703 @param xenapi_vbd: vbd struct from the Xen API
2704 @param vdi_image_path: VDI UUID
2705 @rtype: string
2706 @return: uuid of the device
2707 """
2708 xenapi_vbd['image'] = vdi_image_path
2709 if vdi_image_path.startswith('tap'):
2710 dev_uuid = self.info.device_add('tap', cfg_xenapi = xenapi_vbd)
2711 else:
2712 dev_uuid = self.info.device_add('vbd', cfg_xenapi = xenapi_vbd)
2714 if not dev_uuid:
2715 raise XendError('Failed to create device')
2717 if self._stateGet() in (XEN_API_VM_POWER_STATE_RUNNING,
2718 XEN_API_VM_POWER_STATE_PAUSED):
2719 _, config = self.info['devices'][dev_uuid]
2721 if vdi_image_path.startswith('tap'):
2722 dev_control = self.getDeviceController('tap')
2723 else:
2724 dev_control = self.getDeviceController('vbd')
2726 try:
2727 devid = dev_control.createDevice(config)
2728 dev_control.waitForDevice(devid)
2729 self.info.device_update(dev_uuid,
2730 cfg_xenapi = {'devid': devid})
2731 except Exception, exn:
2732 log.exception(exn)
2733 del self.info['devices'][dev_uuid]
2734 self.info['vbd_refs'].remove(dev_uuid)
2735 raise
2737 return dev_uuid
2739 def create_phantom_vbd_with_vdi(self, xenapi_vbd, vdi_image_path):
2740 """Create a VBD using a VDI from XendStorageRepository.
2742 @param xenapi_vbd: vbd struct from the Xen API
2743 @param vdi_image_path: VDI UUID
2744 @rtype: string
2745 @return: uuid of the device
2746 """
2747 xenapi_vbd['image'] = vdi_image_path
2748 dev_uuid = self.info.phantom_device_add('tap', cfg_xenapi = xenapi_vbd)
2749 if not dev_uuid:
2750 raise XendError('Failed to create device')
2752 if self._stateGet() == XEN_API_VM_POWER_STATE_RUNNING:
2753 _, config = self.info['devices'][dev_uuid]
2754 config['devid'] = self.getDeviceController('tap').createDevice(config)
2756 return config['devid']
2758 def create_vif(self, xenapi_vif):
2759 """Create VIF device from the passed struct in Xen API format.
2761 @param xenapi_vif: Xen API VIF Struct.
2762 @rtype: string
2763 @return: UUID
2764 """
2765 dev_uuid = self.info.device_add('vif', cfg_xenapi = xenapi_vif)
2766 if not dev_uuid:
2767 raise XendError('Failed to create device')
2769 if self._stateGet() in (XEN_API_VM_POWER_STATE_RUNNING,
2770 XEN_API_VM_POWER_STATE_PAUSED):
2772 _, config = self.info['devices'][dev_uuid]
2773 dev_control = self.getDeviceController('vif')
2775 try:
2776 devid = dev_control.createDevice(config)
2777 dev_control.waitForDevice(devid)
2778 self.info.device_update(dev_uuid,
2779 cfg_xenapi = {'devid': devid})
2780 except Exception, exn:
2781 log.exception(exn)
2782 del self.info['devices'][dev_uuid]
2783 self.info['vif_refs'].remove(dev_uuid)
2784 raise
2786 return dev_uuid
2788 def create_vtpm(self, xenapi_vtpm):
2789 """Create a VTPM device from the passed struct in Xen API format.
2791 @return: uuid of the device
2792 @rtype: string
2793 """
2795 if self._stateGet() not in (DOM_STATE_HALTED,):
2796 raise VmError("Can only add vTPM to a halted domain.")
2797 if self.get_vtpms() != []:
2798 raise VmError('Domain already has a vTPM.')
2799 dev_uuid = self.info.device_add('vtpm', cfg_xenapi = xenapi_vtpm)
2800 if not dev_uuid:
2801 raise XendError('Failed to create device')
2803 return dev_uuid
2805 def create_console(self, xenapi_console):
2806 """ Create a console device from a Xen API struct.
2808 @return: uuid of device
2809 @rtype: string
2810 """
2811 if self._stateGet() not in (DOM_STATE_HALTED,):
2812 raise VmError("Can only add console to a halted domain.")
2814 dev_uuid = self.info.device_add('console', cfg_xenapi = xenapi_console)
2815 if not dev_uuid:
2816 raise XendError('Failed to create device')
2818 return dev_uuid
2820 def set_console_other_config(self, console_uuid, other_config):
2821 self.info.console_update(console_uuid, 'other_config', other_config)
2823 def destroy_device_by_uuid(self, dev_type, dev_uuid):
2824 if dev_uuid not in self.info['devices']:
2825 raise XendError('Device does not exist')
2827 try:
2828 if self._stateGet() in (XEN_API_VM_POWER_STATE_RUNNING,
2829 XEN_API_VM_POWER_STATE_PAUSED):
2830 _, config = self.info['devices'][dev_uuid]
2831 devid = config.get('devid')
2832 if devid != None:
2833 self.getDeviceController(dev_type).destroyDevice(devid, force = False)
2834 else:
2835 raise XendError('Unable to get devid for device: %s:%s' %
2836 (dev_type, dev_uuid))
2837 finally:
2838 del self.info['devices'][dev_uuid]
2839 self.info['%s_refs' % dev_type].remove(dev_uuid)
2841 def destroy_vbd(self, dev_uuid):
2842 self.destroy_device_by_uuid('vbd', dev_uuid)
2844 def destroy_vif(self, dev_uuid):
2845 self.destroy_device_by_uuid('vif', dev_uuid)
2847 def destroy_vtpm(self, dev_uuid):
2848 self.destroy_device_by_uuid('vtpm', dev_uuid)
2850 def has_device(self, dev_class, dev_uuid):
2851 return (dev_uuid in self.info['%s_refs' % dev_class.lower()])
2853 def __str__(self):
2854 return '<domain id=%s name=%s memory=%s state=%s>' % \
2855 (str(self.domid), self.info['name_label'],
2856 str(self.info['memory_dynamic_max']), DOM_STATES[self._stateGet()])
2858 __repr__ = __str__