ia64/xen-unstable

view tools/python/xen/xend/XendDomainInfo.py @ 16819:3f26758bcc02

xend: Handle unspecified timer_mode domain platform parameter.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Fri Jan 18 22:27:51 2008 +0000 (2008-01-18)
parents 9fe92a88912b
children 6f3fb3f86b68
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 timer_mode = self.info["platform"].get("timer_mode")
1654 if hvm and timer_mode is not None:
1655 xc.hvm_set_param(self.domid, HVM_PARAM_TIMER_MODE,
1656 long(timer_mode))
1658 # Set maximum number of vcpus in domain
1659 xc.domain_max_vcpus(self.domid, int(self.info['VCPUs_max']))
1661 # Test whether the devices can be assigned with VT-d
1662 pci_str = str(self.info["platform"].get("pci"))
1663 if hvm and pci_str:
1664 bdf = xc.test_assign_device(self.domid, pci_str)
1665 if bdf != 0:
1666 bus = (bdf >> 16) & 0xff
1667 devfn = (bdf >> 8) & 0xff
1668 dev = (devfn >> 3) & 0x1f
1669 func = devfn & 0x7
1670 raise VmError("Fail to assign device(%x:%x.%x): maybe VT-d is "
1671 "not enabled, or the device is not exist, or it "
1672 "has already been assigned to other domain"
1673 % (bus, dev, func))
1675 # register the domain in the list
1676 from xen.xend import XendDomain
1677 XendDomain.instance().add_domain(self)
1679 def _introduceDomain(self):
1680 assert self.domid is not None
1681 assert self.store_mfn is not None
1682 assert self.store_port is not None
1684 try:
1685 IntroduceDomain(self.domid, self.store_mfn, self.store_port)
1686 except RuntimeError, exn:
1687 raise XendError(str(exn))
1690 def _initDomain(self):
1691 log.debug('XendDomainInfo.initDomain: %s %s',
1692 self.domid,
1693 self.info['vcpus_params']['weight'])
1695 self._configureBootloader()
1697 try:
1698 self.image = image.create(self, self.info)
1700 if self.info['platform'].get('localtime', 0):
1701 xc.domain_set_time_offset(self.domid)
1703 xc.domain_setcpuweight(self.domid, \
1704 self.info['vcpus_params']['weight'])
1706 # repin domain vcpus if a restricted cpus list is provided
1707 # this is done prior to memory allocation to aide in memory
1708 # distribution for NUMA systems.
1709 if self.info['cpus'] is not None and len(self.info['cpus']) > 0:
1710 for v in range(0, self.info['VCPUs_max']):
1711 xc.vcpu_setaffinity(self.domid, v, self.info['cpus'])
1713 # Use architecture- and image-specific calculations to determine
1714 # the various headrooms necessary, given the raw configured
1715 # values. maxmem, memory, and shadow are all in KiB.
1716 # but memory_static_max etc are all stored in bytes now.
1717 memory = self.image.getRequiredAvailableMemory(
1718 self.info['memory_dynamic_max'] / 1024)
1719 maxmem = self.image.getRequiredAvailableMemory(
1720 self.info['memory_static_max'] / 1024)
1721 shadow = self.image.getRequiredShadowMemory(
1722 self.info['shadow_memory'] * 1024,
1723 self.info['memory_static_max'] / 1024)
1725 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'],)
1726 # Round shadow up to a multiple of a MiB, as shadow_mem_control
1727 # takes MiB and we must not round down and end up under-providing.
1728 shadow = ((shadow + 1023) / 1024) * 1024
1730 # set memory limit
1731 xc.domain_setmaxmem(self.domid, maxmem)
1733 # Make sure there's enough RAM available for the domain
1734 balloon.free(memory + shadow)
1736 # Set up the shadow memory
1737 shadow_cur = xc.shadow_mem_control(self.domid, shadow / 1024)
1738 self.info['shadow_memory'] = shadow_cur
1740 self._createChannels()
1742 channel_details = self.image.createImage()
1744 self.store_mfn = channel_details['store_mfn']
1745 if 'console_mfn' in channel_details:
1746 self.console_mfn = channel_details['console_mfn']
1747 if 'notes' in channel_details:
1748 self.info.set_notes(channel_details['notes'])
1749 if 'native_protocol' in channel_details:
1750 self.native_protocol = channel_details['native_protocol'];
1752 self._introduceDomain()
1754 self._createDevices()
1756 self.image.cleanupBootloading()
1758 self.info['start_time'] = time.time()
1760 self._stateSet(DOM_STATE_RUNNING)
1761 except VmError, exn:
1762 log.exception("XendDomainInfo.initDomain: exception occurred")
1763 if self.image:
1764 self.image.cleanupBootloading()
1765 raise exn
1766 except RuntimeError, exn:
1767 log.exception("XendDomainInfo.initDomain: exception occurred")
1768 if self.image:
1769 self.image.cleanupBootloading()
1770 raise VmError(str(exn))
1773 def cleanupDomain(self):
1774 """Cleanup domain resources; release devices. Idempotent. Nothrow
1775 guarantee."""
1777 self.refresh_shutdown_lock.acquire()
1778 try:
1779 self.unwatchShutdown()
1780 self._releaseDevices()
1781 bootloader_tidy(self)
1783 if self.image:
1784 self.image = None
1786 try:
1787 self._removeDom()
1788 except:
1789 log.exception("Removing domain path failed.")
1791 self._stateSet(DOM_STATE_HALTED)
1792 self.domid = None # Do not push into _stateSet()!
1793 finally:
1794 self.refresh_shutdown_lock.release()
1797 def unwatchShutdown(self):
1798 """Remove the watch on the domain's control/shutdown node, if any.
1799 Idempotent. Nothrow guarantee. Expects to be protected by the
1800 refresh_shutdown_lock."""
1802 try:
1803 try:
1804 if self.shutdownWatch:
1805 self.shutdownWatch.unwatch()
1806 finally:
1807 self.shutdownWatch = None
1808 except:
1809 log.exception("Unwatching control/shutdown failed.")
1811 def waitForShutdown(self):
1812 self.state_updated.acquire()
1813 try:
1814 while self._stateGet() in (DOM_STATE_RUNNING,DOM_STATE_PAUSED):
1815 self.state_updated.wait()
1816 finally:
1817 self.state_updated.release()
1820 # TODO: recategorise - called from XendCheckpoint
1823 def completeRestore(self, store_mfn, console_mfn):
1825 log.debug("XendDomainInfo.completeRestore")
1827 self.store_mfn = store_mfn
1828 self.console_mfn = console_mfn
1830 self._introduceDomain()
1831 self.image = image.create(self, self.info)
1832 if self.image:
1833 self.image.createDeviceModel(True)
1834 self._storeDomDetails()
1835 self._registerWatches()
1836 self.refreshShutdown()
1838 log.debug("XendDomainInfo.completeRestore done")
1841 def _endRestore(self):
1842 self.setResume(False)
1845 # VM Destroy
1848 def _prepare_phantom_paths(self):
1849 # get associated devices to destroy
1850 # build list of phantom devices to be removed after normal devices
1851 plist = []
1852 if self.domid is not None:
1853 t = xstransact("%s/device/vbd" % GetDomainPath(self.domid))
1854 try:
1855 for dev in t.list():
1856 backend_phantom_vbd = xstransact.Read("%s/device/vbd/%s/phantom_vbd" \
1857 % (self.dompath, dev))
1858 if backend_phantom_vbd is not None:
1859 frontend_phantom_vbd = xstransact.Read("%s/frontend" \
1860 % backend_phantom_vbd)
1861 plist.append(backend_phantom_vbd)
1862 plist.append(frontend_phantom_vbd)
1863 finally:
1864 t.abort()
1865 return plist
1867 def _cleanup_phantom_devs(self, plist):
1868 # remove phantom devices
1869 if not plist == []:
1870 time.sleep(2)
1871 for paths in plist:
1872 if paths.find('backend') != -1:
1873 from xen.xend.server import DevController
1874 # Modify online status /before/ updating state (latter is watched by
1875 # drivers, so this ordering avoids a race).
1876 xstransact.Write(paths, 'online', "0")
1877 xstransact.Write(paths, 'state', str(DevController.xenbusState['Closing']))
1878 # force
1879 xstransact.Remove(paths)
1881 def destroy(self):
1882 """Cleanup VM and destroy domain. Nothrow guarantee."""
1884 log.debug("XendDomainInfo.destroy: domid=%s", str(self.domid))
1886 paths = self._prepare_phantom_paths()
1888 self._cleanupVm()
1889 if self.dompath is not None:
1890 self.destroyDomain()
1892 self._cleanup_phantom_devs(paths)
1894 if "transient" in self.info["other_config"] \
1895 and bool(self.info["other_config"]["transient"]):
1896 from xen.xend import XendDomain
1897 XendDomain.instance().domain_delete_by_dominfo(self)
1900 def destroyDomain(self):
1901 log.debug("XendDomainInfo.destroyDomain(%s)", str(self.domid))
1903 paths = self._prepare_phantom_paths()
1905 try:
1906 if self.domid is not None:
1907 xc.domain_destroy_hook(self.domid)
1908 xc.domain_destroy(self.domid)
1909 for state in DOM_STATES_OLD:
1910 self.info[state] = 0
1911 self._stateSet(DOM_STATE_HALTED)
1912 except:
1913 log.exception("XendDomainInfo.destroy: xc.domain_destroy failed.")
1915 from xen.xend import XendDomain
1916 XendDomain.instance().remove_domain(self)
1918 self.cleanupDomain()
1919 self._cleanup_phantom_devs(paths)
1922 def resumeDomain(self):
1923 log.debug("XendDomainInfo.resumeDomain(%s)", str(self.domid))
1925 if self.domid is None:
1926 return
1927 try:
1928 # could also fetch a parsed note from xenstore
1929 fast = self.info.get_notes().get('SUSPEND_CANCEL') and 1 or 0
1930 if not fast:
1931 self._releaseDevices()
1932 self.testDeviceComplete()
1933 self.testvifsComplete()
1934 log.debug("XendDomainInfo.resumeDomain: devices released")
1936 self._resetChannels()
1938 self._removeDom('control/shutdown')
1939 self._removeDom('device-misc/vif/nextDeviceID')
1941 self._createChannels()
1942 self._introduceDomain()
1943 self._storeDomDetails()
1945 self._createDevices()
1946 log.debug("XendDomainInfo.resumeDomain: devices created")
1948 xc.domain_resume(self.domid, fast)
1949 ResumeDomain(self.domid)
1950 except:
1951 log.exception("XendDomainInfo.resume: xc.domain_resume failed on domain %s." % (str(self.domid)))
1952 self.image.resumeDeviceModel()
1953 log.debug("XendDomainInfo.resumeDomain: completed")
1957 # Channels for xenstore and console
1960 def _createChannels(self):
1961 """Create the channels to the domain.
1962 """
1963 self.store_port = self._createChannel()
1964 self.console_port = self._createChannel()
1967 def _createChannel(self):
1968 """Create an event channel to the domain.
1969 """
1970 try:
1971 if self.domid != None:
1972 return xc.evtchn_alloc_unbound(domid = self.domid,
1973 remote_dom = 0)
1974 except:
1975 log.exception("Exception in alloc_unbound(%s)", str(self.domid))
1976 raise
1978 def _resetChannels(self):
1979 """Reset all event channels in the domain.
1980 """
1981 try:
1982 if self.domid != None:
1983 return xc.evtchn_reset(dom = self.domid)
1984 except:
1985 log.exception("Exception in evtcnh_reset(%s)", str(self.domid))
1986 raise
1990 # Bootloader configuration
1993 def _configureBootloader(self):
1994 """Run the bootloader if we're configured to do so."""
1996 blexec = self.info['PV_bootloader']
1997 bootloader_args = self.info['PV_bootloader_args']
1998 kernel = self.info['PV_kernel']
1999 ramdisk = self.info['PV_ramdisk']
2000 args = self.info['PV_args']
2001 boot = self.info['HVM_boot_policy']
2003 if boot:
2004 # HVM booting.
2005 pass
2006 elif not blexec and kernel:
2007 # Boot from dom0. Nothing left to do -- the kernel and ramdisk
2008 # will be picked up by image.py.
2009 pass
2010 else:
2011 # Boot using bootloader
2012 if not blexec or blexec == 'pygrub':
2013 blexec = osdep.pygrub_path
2015 blcfg = None
2016 disks = [x for x in self.info['vbd_refs']
2017 if self.info['devices'][x][1]['bootable']]
2019 if not disks:
2020 msg = "Had a bootloader specified, but no disks are bootable"
2021 log.error(msg)
2022 raise VmError(msg)
2024 devinfo = self.info['devices'][disks[0]]
2025 devtype = devinfo[0]
2026 disk = devinfo[1]['uname']
2028 fn = blkdev_uname_to_file(disk)
2029 taptype = blkdev_uname_to_taptype(disk)
2030 mounted = devtype == 'tap' and taptype != 'aio' and taptype != 'sync' and not os.stat(fn).st_rdev
2031 if mounted:
2032 # This is a file, not a device. pygrub can cope with a
2033 # file if it's raw, but if it's QCOW or other such formats
2034 # used through blktap, then we need to mount it first.
2036 log.info("Mounting %s on %s." %
2037 (fn, BOOTLOADER_LOOPBACK_DEVICE))
2039 vbd = {
2040 'mode': 'RO',
2041 'device': BOOTLOADER_LOOPBACK_DEVICE,
2044 from xen.xend import XendDomain
2045 dom0 = XendDomain.instance().privilegedDomain()
2046 dom0._waitForDeviceUUID(dom0.create_vbd(vbd, disk))
2047 fn = BOOTLOADER_LOOPBACK_DEVICE
2049 try:
2050 blcfg = bootloader(blexec, fn, self, False,
2051 bootloader_args, kernel, ramdisk, args)
2052 finally:
2053 if mounted:
2054 log.info("Unmounting %s from %s." %
2055 (fn, BOOTLOADER_LOOPBACK_DEVICE))
2057 dom0.destroyDevice('tap', BOOTLOADER_LOOPBACK_DEVICE)
2059 if blcfg is None:
2060 msg = "Had a bootloader specified, but can't find disk"
2061 log.error(msg)
2062 raise VmError(msg)
2064 self.info.update_with_image_sxp(blcfg, True)
2068 # VM Functions
2071 def _readVMDetails(self, params):
2072 """Read the specified parameters from the store.
2073 """
2074 try:
2075 return self._gatherVm(*params)
2076 except ValueError:
2077 # One of the int/float entries in params has a corresponding store
2078 # entry that is invalid. We recover, because older versions of
2079 # Xend may have put the entry there (memory/target, for example),
2080 # but this is in general a bad situation to have reached.
2081 log.exception(
2082 "Store corrupted at %s! Domain %d's configuration may be "
2083 "affected.", self.vmpath, self.domid)
2084 return []
2086 def _cleanupVm(self):
2087 """Cleanup VM resources. Idempotent. Nothrow guarantee."""
2089 self._unwatchVm()
2091 try:
2092 self._removeVm()
2093 except:
2094 log.exception("Removing VM path failed.")
2097 def checkLiveMigrateMemory(self):
2098 """ Make sure there's enough memory to migrate this domain """
2099 overhead_kb = 0
2100 if arch.type == "x86":
2101 # 1MB per vcpu plus 4Kib/Mib of RAM. This is higher than
2102 # the minimum that Xen would allocate if no value were given.
2103 overhead_kb = self.info['VCPUs_max'] * 1024 + \
2104 (self.info['memory_static_max'] / 1024 / 1024) * 4
2105 overhead_kb = ((overhead_kb + 1023) / 1024) * 1024
2106 # The domain might already have some shadow memory
2107 overhead_kb -= xc.shadow_mem_control(self.domid) * 1024
2108 if overhead_kb > 0:
2109 balloon.free(overhead_kb)
2111 def _unwatchVm(self):
2112 """Remove the watch on the VM path, if any. Idempotent. Nothrow
2113 guarantee."""
2114 try:
2115 try:
2116 if self.vmWatch:
2117 self.vmWatch.unwatch()
2118 finally:
2119 self.vmWatch = None
2120 except:
2121 log.exception("Unwatching VM path failed.")
2123 def testDeviceComplete(self):
2124 """ For Block IO migration safety we must ensure that
2125 the device has shutdown correctly, i.e. all blocks are
2126 flushed to disk
2127 """
2128 start = time.time()
2129 while True:
2130 test = 0
2131 diff = time.time() - start
2132 for i in self.getDeviceController('vbd').deviceIDs():
2133 test = 1
2134 log.info("Dev %s still active, looping...", i)
2135 time.sleep(0.1)
2137 if test == 0:
2138 break
2139 if diff >= MIGRATE_TIMEOUT:
2140 log.info("Dev still active but hit max loop timeout")
2141 break
2143 def testvifsComplete(self):
2144 """ In case vifs are released and then created for the same
2145 domain, we need to wait the device shut down.
2146 """
2147 start = time.time()
2148 while True:
2149 test = 0
2150 diff = time.time() - start
2151 for i in self.getDeviceController('vif').deviceIDs():
2152 test = 1
2153 log.info("Dev %s still active, looping...", i)
2154 time.sleep(0.1)
2156 if test == 0:
2157 break
2158 if diff >= MIGRATE_TIMEOUT:
2159 log.info("Dev still active but hit max loop timeout")
2160 break
2162 def _storeVmDetails(self):
2163 to_store = {}
2165 for key in XendConfig.LEGACY_XENSTORE_VM_PARAMS:
2166 info_key = XendConfig.LEGACY_CFG_TO_XENAPI_CFG.get(key, key)
2167 if self._infoIsSet(info_key):
2168 to_store[key] = str(self.info[info_key])
2170 if self._infoIsSet("static_memory_min"):
2171 to_store["memory"] = str(self.info["static_memory_min"])
2172 if self._infoIsSet("static_memory_max"):
2173 to_store["maxmem"] = str(self.info["static_memory_max"])
2175 image_sxpr = self.info.image_sxpr()
2176 if image_sxpr:
2177 to_store['image'] = sxp.to_string(image_sxpr)
2179 if not self._readVm('xend/restart_count'):
2180 to_store['xend/restart_count'] = str(0)
2182 log.debug("Storing VM details: %s", scrub_password(to_store))
2184 self._writeVm(to_store)
2185 self._setVmPermissions()
2188 def _setVmPermissions(self):
2189 """Allow the guest domain to read its UUID. We don't allow it to
2190 access any other entry, for security."""
2191 xstransact.SetPermissions('%s/uuid' % self.vmpath,
2192 { 'dom' : self.domid,
2193 'read' : True,
2194 'write' : False })
2197 # Utility functions
2200 def __getattr__(self, name):
2201 if name == "state":
2202 log.warn("Somebody tried to read XendDomainInfo.state... should us _stateGet()!!!")
2203 log.warn("".join(traceback.format_stack()))
2204 return self._stateGet()
2205 else:
2206 raise AttributeError()
2208 def __setattr__(self, name, value):
2209 if name == "state":
2210 log.warn("Somebody tried to set XendDomainInfo.state... should us _stateGet()!!!")
2211 log.warn("".join(traceback.format_stack()))
2212 self._stateSet(value)
2213 else:
2214 self.__dict__[name] = value
2216 def _stateSet(self, state):
2217 self.state_updated.acquire()
2218 try:
2219 # TODO Not sure this is correct...
2220 # _stateGet is live now. Why not fire event
2221 # even when it hasn't changed?
2222 if self._stateGet() != state:
2223 self.state_updated.notifyAll()
2224 import XendAPI
2225 XendAPI.event_dispatch('mod', 'VM', self.info['uuid'],
2226 'power_state')
2227 finally:
2228 self.state_updated.release()
2230 def _stateGet(self):
2231 # Lets try and reconsitute the state from xc
2232 # first lets try and get the domain info
2233 # from xc - this will tell us if the domain
2234 # exists
2235 info = dom_get(self.getDomid())
2236 if info is None or info['shutdown']:
2237 # We are either HALTED or SUSPENDED
2238 # check saved image exists
2239 from xen.xend import XendDomain
2240 managed_config_path = \
2241 XendDomain.instance()._managed_check_point_path( \
2242 self.get_uuid())
2243 if os.path.exists(managed_config_path):
2244 return XEN_API_VM_POWER_STATE_SUSPENDED
2245 else:
2246 return XEN_API_VM_POWER_STATE_HALTED
2247 else:
2248 # We are either RUNNING or PAUSED
2249 if info['paused']:
2250 return XEN_API_VM_POWER_STATE_PAUSED
2251 else:
2252 return XEN_API_VM_POWER_STATE_RUNNING
2254 def _infoIsSet(self, name):
2255 return name in self.info and self.info[name] is not None
2257 def _checkName(self, name):
2258 """Check if a vm name is valid. Valid names contain alphabetic
2259 characters, digits, or characters in '_-.:/+'.
2260 The same name cannot be used for more than one vm at the same time.
2262 @param name: name
2263 @raise: VmError if invalid
2264 """
2265 from xen.xend import XendDomain
2267 if name is None or name == '':
2268 raise VmError('Missing VM Name')
2270 if not re.search(r'^[A-Za-z0-9_\-\.\:\/\+]+$', name):
2271 raise VmError('Invalid VM Name')
2273 dom = XendDomain.instance().domain_lookup_nr(name)
2274 if dom and dom.info['uuid'] != self.info['uuid']:
2275 raise VmError("VM name '%s' already exists%s" %
2276 (name,
2277 dom.domid is not None and
2278 (" as domain %s" % str(dom.domid)) or ""))
2281 def update(self, info = None, refresh = True, transaction = None):
2282 """Update with info from xc.domain_getinfo().
2283 """
2284 log.trace("XendDomainInfo.update(%s) on domain %s", info,
2285 str(self.domid))
2287 if not info:
2288 info = dom_get(self.domid)
2289 if not info:
2290 return
2292 if info["maxmem_kb"] < 0:
2293 info["maxmem_kb"] = XendNode.instance() \
2294 .physinfo_dict()['total_memory'] * 1024
2296 #ssidref field not used any longer
2297 if 'ssidref' in info:
2298 info.pop('ssidref')
2300 # make sure state is reset for info
2301 # TODO: we should eventually get rid of old_dom_states
2303 self.info.update_config(info)
2304 self._update_consoles(transaction)
2306 if refresh:
2307 self.refreshShutdown(info)
2309 log.trace("XendDomainInfo.update done on domain %s: %s",
2310 str(self.domid), self.info)
2312 def sxpr(self, ignore_store = False, legacy_only = True):
2313 result = self.info.to_sxp(domain = self,
2314 ignore_devices = ignore_store,
2315 legacy_only = legacy_only)
2317 #if not ignore_store and self.dompath:
2318 # vnc_port = self.readDom('console/vnc-port')
2319 # if vnc_port is not None:
2320 # result.append(['device',
2321 # ['console', ['vnc-port', str(vnc_port)]]])
2323 return result
2325 # Xen API
2326 # ----------------------------------------------------------------
2328 def get_uuid(self):
2329 dom_uuid = self.info.get('uuid')
2330 if not dom_uuid: # if it doesn't exist, make one up
2331 dom_uuid = uuid.createString()
2332 self.info['uuid'] = dom_uuid
2333 return dom_uuid
2335 def get_memory_static_max(self):
2336 return self.info.get('memory_static_max', 0)
2337 def get_memory_static_min(self):
2338 return self.info.get('memory_static_min', 0)
2339 def get_memory_dynamic_max(self):
2340 return self.info.get('memory_dynamic_max', 0)
2341 def get_memory_dynamic_min(self):
2342 return self.info.get('memory_dynamic_min', 0)
2344 # only update memory-related config values if they maintain sanity
2345 def _safe_set_memory(self, key, newval):
2346 oldval = self.info.get(key, 0)
2347 try:
2348 self.info[key] = newval
2349 self.info._memory_sanity_check()
2350 except Exception, ex:
2351 self.info[key] = oldval
2352 raise
2354 def set_memory_static_max(self, val):
2355 self._safe_set_memory('memory_static_max', val)
2356 def set_memory_static_min(self, val):
2357 self._safe_set_memory('memory_static_min', val)
2358 def set_memory_dynamic_max(self, val):
2359 self._safe_set_memory('memory_dynamic_max', val)
2360 def set_memory_dynamic_min(self, val):
2361 self._safe_set_memory('memory_dynamic_min', val)
2363 def get_vcpus_params(self):
2364 if self.getDomid() is None:
2365 return self.info['vcpus_params']
2367 retval = xc.sched_credit_domain_get(self.getDomid())
2368 return retval
2369 def get_power_state(self):
2370 return XEN_API_VM_POWER_STATE[self._stateGet()]
2371 def get_platform(self):
2372 return self.info.get('platform', {})
2373 def get_pci_bus(self):
2374 return self.info.get('pci_bus', '')
2375 def get_tools_version(self):
2376 return self.info.get('tools_version', {})
2377 def get_metrics(self):
2378 return self.metrics.get_uuid();
2381 def get_security_label(self, xspol=None):
2382 import xen.util.xsm.xsm as security
2383 label = security.get_security_label(self, xspol)
2384 return label
2386 def set_security_label(self, seclab, old_seclab, xspol=None,
2387 xspol_old=None):
2388 """
2389 Set the security label of a domain from its old to
2390 a new value.
2391 @param seclab New security label formatted in the form
2392 <policy type>:<policy name>:<vm label>
2393 @param old_seclab The current security label that the
2394 VM must have.
2395 @param xspol An optional policy under which this
2396 update should be done. If not given,
2397 then the current active policy is used.
2398 @param xspol_old The old policy; only to be passed during
2399 the updating of a policy
2400 @return Returns return code, a string with errors from
2401 the hypervisor's operation, old label of the
2402 domain
2403 """
2404 rc = 0
2405 errors = ""
2406 old_label = ""
2407 new_ssidref = 0
2408 domid = self.getDomid()
2409 res_labels = None
2410 is_policy_update = (xspol_old != None)
2412 from xen.xend.XendXSPolicyAdmin import XSPolicyAdminInstance
2413 from xen.util import xsconstants
2415 state = self._stateGet()
2416 # Relabel only HALTED or RUNNING or PAUSED domains
2417 if domid != 0 and \
2418 state not in \
2419 [ DOM_STATE_HALTED, DOM_STATE_RUNNING, DOM_STATE_PAUSED, \
2420 DOM_STATE_SUSPENDED ]:
2421 log.warn("Relabeling domain not possible in state '%s'" %
2422 DOM_STATES[state])
2423 return (-xsconstants.XSERR_VM_WRONG_STATE, "", "", 0)
2425 # Remove security label. Works only for halted domains
2426 if not seclab or seclab == "":
2427 if state not in [ DOM_STATE_HALTED ]:
2428 return (-xsconstants.XSERR_VM_WRONG_STATE, "", "", 0)
2430 if self.info.has_key('security_label'):
2431 old_label = self.info['security_label']
2432 # Check label against expected one.
2433 if old_label != old_seclab:
2434 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2435 del self.info['security_label']
2436 xen.xend.XendDomain.instance().managed_config_save(self)
2437 return (xsconstants.XSERR_SUCCESS, "", "", 0)
2439 tmp = seclab.split(":")
2440 if len(tmp) != 3:
2441 return (-xsconstants.XSERR_BAD_LABEL_FORMAT, "", "", 0)
2442 typ, policy, label = tmp
2444 poladmin = XSPolicyAdminInstance()
2445 if not xspol:
2446 xspol = poladmin.get_policy_by_name(policy)
2448 if state in [ DOM_STATE_RUNNING, DOM_STATE_PAUSED ]:
2449 #if domain is running or paused try to relabel in hypervisor
2450 if not xspol:
2451 return (-xsconstants.XSERR_POLICY_NOT_LOADED, "", "", 0)
2453 if typ != xspol.get_type_name() or \
2454 policy != xspol.get_name():
2455 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2457 if typ == xsconstants.ACM_POLICY_ID:
2458 new_ssidref = xspol.vmlabel_to_ssidref(label)
2459 if new_ssidref == xsconstants.INVALID_SSIDREF:
2460 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2462 # Check that all used resources are accessible under the
2463 # new label
2464 if not is_policy_update and \
2465 not security.resources_compatible_with_vmlabel(xspol,
2466 self, label):
2467 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2469 #Check label against expected one. Can only do this
2470 # if the policy hasn't changed underneath in the meantime
2471 if xspol_old == None:
2472 old_label = self.get_security_label()
2473 if old_label != old_seclab:
2474 log.info("old_label != old_seclab: %s != %s" %
2475 (old_label, old_seclab))
2476 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2478 # relabel domain in the hypervisor
2479 rc, errors = security.relabel_domains([[domid, new_ssidref]])
2480 log.info("rc from relabeling in HV: %d" % rc)
2481 else:
2482 return (-xsconstants.XSERR_POLICY_TYPE_UNSUPPORTED, "", "", 0)
2484 if rc == 0:
2485 # HALTED, RUNNING or PAUSED
2486 if domid == 0:
2487 if xspol:
2488 self.info['security_label'] = seclab
2489 ssidref = poladmin.set_domain0_bootlabel(xspol, label)
2490 else:
2491 return (-xsconstants.XSERR_POLICY_NOT_LOADED, "", "", 0)
2492 else:
2493 if self.info.has_key('security_label'):
2494 old_label = self.info['security_label']
2495 # Check label against expected one, unless wildcard
2496 if old_label != old_seclab:
2497 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2499 self.info['security_label'] = seclab
2501 try:
2502 xen.xend.XendDomain.instance().managed_config_save(self)
2503 except:
2504 pass
2505 return (rc, errors, old_label, new_ssidref)
2507 def get_on_shutdown(self):
2508 after_shutdown = self.info.get('actions_after_shutdown')
2509 if not after_shutdown or after_shutdown not in XEN_API_ON_NORMAL_EXIT:
2510 return XEN_API_ON_NORMAL_EXIT[-1]
2511 return after_shutdown
2513 def get_on_reboot(self):
2514 after_reboot = self.info.get('actions_after_reboot')
2515 if not after_reboot or after_reboot not in XEN_API_ON_NORMAL_EXIT:
2516 return XEN_API_ON_NORMAL_EXIT[-1]
2517 return after_reboot
2519 def get_on_suspend(self):
2520 # TODO: not supported
2521 after_suspend = self.info.get('actions_after_suspend')
2522 if not after_suspend or after_suspend not in XEN_API_ON_NORMAL_EXIT:
2523 return XEN_API_ON_NORMAL_EXIT[-1]
2524 return after_suspend
2526 def get_on_crash(self):
2527 after_crash = self.info.get('actions_after_crash')
2528 if not after_crash or after_crash not in XEN_API_ON_CRASH_BEHAVIOUR:
2529 return XEN_API_ON_CRASH_BEHAVIOUR[0]
2530 return after_crash
2532 def get_dev_config_by_uuid(self, dev_class, dev_uuid):
2533 """ Get's a device configuration either from XendConfig or
2534 from the DevController.
2536 @param dev_class: device class, either, 'vbd' or 'vif'
2537 @param dev_uuid: device UUID
2539 @rtype: dictionary
2540 """
2541 dev_type, dev_config = self.info['devices'].get(dev_uuid, (None, None))
2543 # shortcut if the domain isn't started because
2544 # the devcontrollers will have no better information
2545 # than XendConfig.
2546 if self._stateGet() in (XEN_API_VM_POWER_STATE_HALTED,):
2547 if dev_config:
2548 return copy.deepcopy(dev_config)
2549 return None
2551 # instead of using dev_class, we use the dev_type
2552 # that is from XendConfig.
2553 controller = self.getDeviceController(dev_type)
2554 if not controller:
2555 return None
2557 all_configs = controller.getAllDeviceConfigurations()
2558 if not all_configs:
2559 return None
2561 updated_dev_config = copy.deepcopy(dev_config)
2562 for _devid, _devcfg in all_configs.items():
2563 if _devcfg.get('uuid') == dev_uuid:
2564 updated_dev_config.update(_devcfg)
2565 updated_dev_config['id'] = _devid
2566 return updated_dev_config
2568 return updated_dev_config
2570 def get_dev_xenapi_config(self, dev_class, dev_uuid):
2571 config = self.get_dev_config_by_uuid(dev_class, dev_uuid)
2572 if not config:
2573 return {}
2575 config['VM'] = self.get_uuid()
2577 if dev_class == 'vif':
2578 if not config.has_key('name'):
2579 config['name'] = config.get('vifname', '')
2580 if not config.has_key('MAC'):
2581 config['MAC'] = config.get('mac', '')
2582 if not config.has_key('type'):
2583 config['type'] = 'paravirtualised'
2584 if not config.has_key('device'):
2585 devid = config.get('id')
2586 if devid != None:
2587 config['device'] = 'eth%d' % devid
2588 else:
2589 config['device'] = ''
2591 if not config.has_key('network'):
2592 try:
2593 bridge = config.get('bridge', None)
2594 if bridge is None:
2595 from xen.util import Brctl
2596 if_to_br = dict([(i,b)
2597 for (b,ifs) in Brctl.get_state().items()
2598 for i in ifs])
2599 vifname = "vif%s.%s" % (self.getDomid(),
2600 config.get('id'))
2601 bridge = if_to_br.get(vifname, None)
2602 config['network'] = \
2603 XendNode.instance().bridge_to_network(
2604 config.get('bridge')).get_uuid()
2605 except Exception:
2606 log.exception('bridge_to_network')
2607 # Ignore this for now -- it may happen if the device
2608 # has been specified using the legacy methods, but at
2609 # some point we're going to have to figure out how to
2610 # handle that properly.
2612 config['MTU'] = 1500 # TODO
2614 if self._stateGet() not in (XEN_API_VM_POWER_STATE_HALTED,):
2615 xennode = XendNode.instance()
2616 rx_bps, tx_bps = xennode.get_vif_util(self.domid, devid)
2617 config['io_read_kbs'] = rx_bps/1024
2618 config['io_write_kbs'] = tx_bps/1024
2619 rx, tx = xennode.get_vif_stat(self.domid, devid)
2620 config['io_total_read_kbs'] = rx/1024
2621 config['io_total_write_kbs'] = tx/1024
2622 else:
2623 config['io_read_kbs'] = 0.0
2624 config['io_write_kbs'] = 0.0
2625 config['io_total_read_kbs'] = 0.0
2626 config['io_total_write_kbs'] = 0.0
2628 config['security_label'] = config.get('security_label', '')
2630 if dev_class == 'vbd':
2632 if self._stateGet() not in (XEN_API_VM_POWER_STATE_HALTED,):
2633 controller = self.getDeviceController(dev_class)
2634 devid, _1, _2 = controller.getDeviceDetails(config)
2635 xennode = XendNode.instance()
2636 rd_blkps, wr_blkps = xennode.get_vbd_util(self.domid, devid)
2637 config['io_read_kbs'] = rd_blkps
2638 config['io_write_kbs'] = wr_blkps
2639 else:
2640 config['io_read_kbs'] = 0.0
2641 config['io_write_kbs'] = 0.0
2643 config['VDI'] = config.get('VDI', '')
2644 config['device'] = config.get('dev', '')
2645 if ':' in config['device']:
2646 vbd_name, vbd_type = config['device'].split(':', 1)
2647 config['device'] = vbd_name
2648 if vbd_type == 'cdrom':
2649 config['type'] = XEN_API_VBD_TYPE[0]
2650 else:
2651 config['type'] = XEN_API_VBD_TYPE[1]
2653 config['driver'] = 'paravirtualised' # TODO
2654 config['image'] = config.get('uname', '')
2656 if config.get('mode', 'r') == 'r':
2657 config['mode'] = 'RO'
2658 else:
2659 config['mode'] = 'RW'
2661 if dev_class == 'vtpm':
2662 if not config.has_key('type'):
2663 config['type'] = 'paravirtualised' # TODO
2664 if not config.has_key('backend'):
2665 config['backend'] = "00000000-0000-0000-0000-000000000000"
2667 return config
2669 def get_dev_property(self, dev_class, dev_uuid, field):
2670 config = self.get_dev_xenapi_config(dev_class, dev_uuid)
2671 try:
2672 return config[field]
2673 except KeyError:
2674 raise XendError('Invalid property for device: %s' % field)
2676 def set_dev_property(self, dev_class, dev_uuid, field, value):
2677 self.info['devices'][dev_uuid][1][field] = value
2679 def get_vcpus_util(self):
2680 vcpu_util = {}
2681 xennode = XendNode.instance()
2682 if 'VCPUs_max' in self.info and self.domid != None:
2683 for i in range(0, self.info['VCPUs_max']):
2684 util = xennode.get_vcpu_util(self.domid, i)
2685 vcpu_util[str(i)] = util
2687 return vcpu_util
2689 def get_consoles(self):
2690 return self.info.get('console_refs', [])
2692 def get_vifs(self):
2693 return self.info.get('vif_refs', [])
2695 def get_vbds(self):
2696 return self.info.get('vbd_refs', [])
2698 def get_vtpms(self):
2699 return self.info.get('vtpm_refs', [])
2701 def create_vbd(self, xenapi_vbd, vdi_image_path):
2702 """Create a VBD using a VDI from XendStorageRepository.
2704 @param xenapi_vbd: vbd struct from the Xen API
2705 @param vdi_image_path: VDI UUID
2706 @rtype: string
2707 @return: uuid of the device
2708 """
2709 xenapi_vbd['image'] = vdi_image_path
2710 if vdi_image_path.startswith('tap'):
2711 dev_uuid = self.info.device_add('tap', cfg_xenapi = xenapi_vbd)
2712 else:
2713 dev_uuid = self.info.device_add('vbd', cfg_xenapi = xenapi_vbd)
2715 if not dev_uuid:
2716 raise XendError('Failed to create device')
2718 if self._stateGet() in (XEN_API_VM_POWER_STATE_RUNNING,
2719 XEN_API_VM_POWER_STATE_PAUSED):
2720 _, config = self.info['devices'][dev_uuid]
2722 if vdi_image_path.startswith('tap'):
2723 dev_control = self.getDeviceController('tap')
2724 else:
2725 dev_control = self.getDeviceController('vbd')
2727 try:
2728 devid = dev_control.createDevice(config)
2729 dev_control.waitForDevice(devid)
2730 self.info.device_update(dev_uuid,
2731 cfg_xenapi = {'devid': devid})
2732 except Exception, exn:
2733 log.exception(exn)
2734 del self.info['devices'][dev_uuid]
2735 self.info['vbd_refs'].remove(dev_uuid)
2736 raise
2738 return dev_uuid
2740 def create_phantom_vbd_with_vdi(self, xenapi_vbd, vdi_image_path):
2741 """Create a VBD using a VDI from XendStorageRepository.
2743 @param xenapi_vbd: vbd struct from the Xen API
2744 @param vdi_image_path: VDI UUID
2745 @rtype: string
2746 @return: uuid of the device
2747 """
2748 xenapi_vbd['image'] = vdi_image_path
2749 dev_uuid = self.info.phantom_device_add('tap', cfg_xenapi = xenapi_vbd)
2750 if not dev_uuid:
2751 raise XendError('Failed to create device')
2753 if self._stateGet() == XEN_API_VM_POWER_STATE_RUNNING:
2754 _, config = self.info['devices'][dev_uuid]
2755 config['devid'] = self.getDeviceController('tap').createDevice(config)
2757 return config['devid']
2759 def create_vif(self, xenapi_vif):
2760 """Create VIF device from the passed struct in Xen API format.
2762 @param xenapi_vif: Xen API VIF Struct.
2763 @rtype: string
2764 @return: UUID
2765 """
2766 dev_uuid = self.info.device_add('vif', cfg_xenapi = xenapi_vif)
2767 if not dev_uuid:
2768 raise XendError('Failed to create device')
2770 if self._stateGet() in (XEN_API_VM_POWER_STATE_RUNNING,
2771 XEN_API_VM_POWER_STATE_PAUSED):
2773 _, config = self.info['devices'][dev_uuid]
2774 dev_control = self.getDeviceController('vif')
2776 try:
2777 devid = dev_control.createDevice(config)
2778 dev_control.waitForDevice(devid)
2779 self.info.device_update(dev_uuid,
2780 cfg_xenapi = {'devid': devid})
2781 except Exception, exn:
2782 log.exception(exn)
2783 del self.info['devices'][dev_uuid]
2784 self.info['vif_refs'].remove(dev_uuid)
2785 raise
2787 return dev_uuid
2789 def create_vtpm(self, xenapi_vtpm):
2790 """Create a VTPM device from the passed struct in Xen API format.
2792 @return: uuid of the device
2793 @rtype: string
2794 """
2796 if self._stateGet() not in (DOM_STATE_HALTED,):
2797 raise VmError("Can only add vTPM to a halted domain.")
2798 if self.get_vtpms() != []:
2799 raise VmError('Domain already has a vTPM.')
2800 dev_uuid = self.info.device_add('vtpm', cfg_xenapi = xenapi_vtpm)
2801 if not dev_uuid:
2802 raise XendError('Failed to create device')
2804 return dev_uuid
2806 def create_console(self, xenapi_console):
2807 """ Create a console device from a Xen API struct.
2809 @return: uuid of device
2810 @rtype: string
2811 """
2812 if self._stateGet() not in (DOM_STATE_HALTED,):
2813 raise VmError("Can only add console to a halted domain.")
2815 dev_uuid = self.info.device_add('console', cfg_xenapi = xenapi_console)
2816 if not dev_uuid:
2817 raise XendError('Failed to create device')
2819 return dev_uuid
2821 def set_console_other_config(self, console_uuid, other_config):
2822 self.info.console_update(console_uuid, 'other_config', other_config)
2824 def destroy_device_by_uuid(self, dev_type, dev_uuid):
2825 if dev_uuid not in self.info['devices']:
2826 raise XendError('Device does not exist')
2828 try:
2829 if self._stateGet() in (XEN_API_VM_POWER_STATE_RUNNING,
2830 XEN_API_VM_POWER_STATE_PAUSED):
2831 _, config = self.info['devices'][dev_uuid]
2832 devid = config.get('devid')
2833 if devid != None:
2834 self.getDeviceController(dev_type).destroyDevice(devid, force = False)
2835 else:
2836 raise XendError('Unable to get devid for device: %s:%s' %
2837 (dev_type, dev_uuid))
2838 finally:
2839 del self.info['devices'][dev_uuid]
2840 self.info['%s_refs' % dev_type].remove(dev_uuid)
2842 def destroy_vbd(self, dev_uuid):
2843 self.destroy_device_by_uuid('vbd', dev_uuid)
2845 def destroy_vif(self, dev_uuid):
2846 self.destroy_device_by_uuid('vif', dev_uuid)
2848 def destroy_vtpm(self, dev_uuid):
2849 self.destroy_device_by_uuid('vtpm', dev_uuid)
2851 def has_device(self, dev_class, dev_uuid):
2852 return (dev_uuid in self.info['%s_refs' % dev_class.lower()])
2854 def __str__(self):
2855 return '<domain id=%s name=%s memory=%s state=%s>' % \
2856 (str(self.domid), self.info['name_label'],
2857 str(self.info['memory_dynamic_max']), DOM_STATES[self._stateGet()])
2859 __repr__ = __str__