debuggers.hg

view tools/python/xen/xend/XendDomainInfo.py @ 16675:9b37cabe0485

xend: Indicate a resume operation

Indicate that the domain is created as part of a resume operation
rather than a 'create'.

Signed-off-by: Stefan Berger <stefanb@us.ibm.com>
author Keir Fraser <keir.fraser@citrix.com>
date Wed Dec 19 14:45:04 2007 +0000 (2007-12-19)
parents ef83b50fc4a4
children 9fe92a88912b
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 for devclass in XendDevices.valid_devices():
1529 for dev in t.list(devclass):
1530 try:
1531 log.debug("Removing %s", dev);
1532 self.destroyDevice(devclass, dev, False);
1533 except:
1534 # Log and swallow any exceptions in removal --
1535 # there's nothing more we can do.
1536 log.exception("Device release failed: %s; %s; %s",
1537 self.info['name_label'], devclass, dev)
1541 def getDeviceController(self, name):
1542 """Get the device controller for this domain, and if it
1543 doesn't exist, create it.
1545 @param name: device class name
1546 @type name: string
1547 @rtype: subclass of DevController
1548 """
1549 if name not in self._deviceControllers:
1550 devController = XendDevices.make_controller(name, self)
1551 if not devController:
1552 raise XendError("Unknown device type: %s" % name)
1553 self._deviceControllers[name] = devController
1555 return self._deviceControllers[name]
1558 # Migration functions (public)
1561 def testMigrateDevices(self, network, dst):
1562 """ Notify all device about intention of migration
1563 @raise: XendError for a device that cannot be migrated
1564 """
1565 for (n, c) in self.info.all_devices_sxpr():
1566 rc = self.migrateDevice(n, c, network, dst, DEV_MIGRATE_TEST)
1567 if rc != 0:
1568 raise XendError("Device of type '%s' refuses migration." % n)
1570 def migrateDevices(self, network, dst, step, domName=''):
1571 """Notify the devices about migration
1572 """
1573 ctr = 0
1574 try:
1575 for (dev_type, dev_conf) in self.info.all_devices_sxpr():
1576 self.migrateDevice(dev_type, dev_conf, network, dst,
1577 step, domName)
1578 ctr = ctr + 1
1579 except:
1580 for dev_type, dev_conf in self.info.all_devices_sxpr():
1581 if ctr == 0:
1582 step = step - 1
1583 ctr = ctr - 1
1584 self._recoverMigrateDevice(dev_type, dev_conf, network,
1585 dst, step, domName)
1586 raise
1588 def migrateDevice(self, deviceClass, deviceConfig, network, dst,
1589 step, domName=''):
1590 return self.getDeviceController(deviceClass).migrate(deviceConfig,
1591 network, dst, step, domName)
1593 def _recoverMigrateDevice(self, deviceClass, deviceConfig, network,
1594 dst, step, domName=''):
1595 return self.getDeviceController(deviceClass).recover_migrate(
1596 deviceConfig, network, dst, step, domName)
1599 ## private:
1601 def _constructDomain(self):
1602 """Construct the domain.
1604 @raise: VmError on error
1605 """
1607 log.debug('XendDomainInfo.constructDomain')
1609 self.shutdownStartTime = None
1611 hvm = self.info.is_hvm()
1612 if hvm:
1613 info = xc.xeninfo()
1614 if 'hvm' not in info['xen_caps']:
1615 raise VmError("HVM guest support is unavailable: is VT/AMD-V "
1616 "supported by your CPU and enabled in your "
1617 "BIOS?")
1619 # Hack to pre-reserve some memory for initial domain creation.
1620 # There is an implicit memory overhead for any domain creation. This
1621 # overhead is greater for some types of domain than others. For
1622 # example, an x86 HVM domain will have a default shadow-pagetable
1623 # allocation of 1MB. We free up 2MB here to be on the safe side.
1624 balloon.free(2*1024) # 2MB should be plenty
1626 ssidref = 0
1627 if security.on():
1628 ssidref = security.calc_dom_ssidref_from_info(self.info)
1629 if security.has_authorization(ssidref) == False:
1630 raise VmError("VM is not authorized to run.")
1632 try:
1633 self.domid = xc.domain_create(
1634 domid = 0,
1635 ssidref = ssidref,
1636 handle = uuid.fromString(self.info['uuid']),
1637 hvm = int(hvm))
1638 except Exception, e:
1639 # may get here if due to ACM the operation is not permitted
1640 if security.on():
1641 raise VmError('Domain in conflict set with running domain?')
1643 if self.domid < 0:
1644 raise VmError('Creating domain failed: name=%s' %
1645 self.info['name_label'])
1647 self.dompath = GetDomainPath(self.domid)
1649 self._recreateDom()
1651 # Set timer configration of domain
1652 if hvm:
1653 xc.hvm_set_param(self.domid, HVM_PARAM_TIMER_MODE,
1654 long(self.info["platform"].get("timer_mode")))
1656 # Set maximum number of vcpus in domain
1657 xc.domain_max_vcpus(self.domid, int(self.info['VCPUs_max']))
1659 # Test whether the devices can be assigned with VT-d
1660 pci_str = str(self.info["platform"].get("pci"))
1661 if hvm and pci_str:
1662 bdf = xc.test_assign_device(self.domid, pci_str)
1663 if bdf != 0:
1664 bus = (bdf >> 16) & 0xff
1665 devfn = (bdf >> 8) & 0xff
1666 dev = (devfn >> 3) & 0x1f
1667 func = devfn & 0x7
1668 raise VmError("Fail to assign device(%x:%x.%x): maybe VT-d is "
1669 "not enabled, or the device is not exist, or it "
1670 "has already been assigned to other domain"
1671 % (bus, dev, func))
1673 # register the domain in the list
1674 from xen.xend import XendDomain
1675 XendDomain.instance().add_domain(self)
1677 def _introduceDomain(self):
1678 assert self.domid is not None
1679 assert self.store_mfn is not None
1680 assert self.store_port is not None
1682 try:
1683 IntroduceDomain(self.domid, self.store_mfn, self.store_port)
1684 except RuntimeError, exn:
1685 raise XendError(str(exn))
1688 def _initDomain(self):
1689 log.debug('XendDomainInfo.initDomain: %s %s',
1690 self.domid,
1691 self.info['vcpus_params']['weight'])
1693 self._configureBootloader()
1695 try:
1696 self.image = image.create(self, self.info)
1698 if self.info['platform'].get('localtime', 0):
1699 xc.domain_set_time_offset(self.domid)
1701 xc.domain_setcpuweight(self.domid, \
1702 self.info['vcpus_params']['weight'])
1704 # repin domain vcpus if a restricted cpus list is provided
1705 # this is done prior to memory allocation to aide in memory
1706 # distribution for NUMA systems.
1707 if self.info['cpus'] is not None and len(self.info['cpus']) > 0:
1708 for v in range(0, self.info['VCPUs_max']):
1709 xc.vcpu_setaffinity(self.domid, v, self.info['cpus'])
1711 # Use architecture- and image-specific calculations to determine
1712 # the various headrooms necessary, given the raw configured
1713 # values. maxmem, memory, and shadow are all in KiB.
1714 # but memory_static_max etc are all stored in bytes now.
1715 memory = self.image.getRequiredAvailableMemory(
1716 self.info['memory_dynamic_max'] / 1024)
1717 maxmem = self.image.getRequiredAvailableMemory(
1718 self.info['memory_static_max'] / 1024)
1719 shadow = self.image.getRequiredShadowMemory(
1720 self.info['shadow_memory'] * 1024,
1721 self.info['memory_static_max'] / 1024)
1723 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'],)
1724 # Round shadow up to a multiple of a MiB, as shadow_mem_control
1725 # takes MiB and we must not round down and end up under-providing.
1726 shadow = ((shadow + 1023) / 1024) * 1024
1728 # set memory limit
1729 xc.domain_setmaxmem(self.domid, maxmem)
1731 # Make sure there's enough RAM available for the domain
1732 balloon.free(memory + shadow)
1734 # Set up the shadow memory
1735 shadow_cur = xc.shadow_mem_control(self.domid, shadow / 1024)
1736 self.info['shadow_memory'] = shadow_cur
1738 self._createChannels()
1740 channel_details = self.image.createImage()
1742 self.store_mfn = channel_details['store_mfn']
1743 if 'console_mfn' in channel_details:
1744 self.console_mfn = channel_details['console_mfn']
1745 if 'notes' in channel_details:
1746 self.info.set_notes(channel_details['notes'])
1747 if 'native_protocol' in channel_details:
1748 self.native_protocol = channel_details['native_protocol'];
1750 self._introduceDomain()
1752 self._createDevices()
1754 self.image.cleanupBootloading()
1756 self.info['start_time'] = time.time()
1758 self._stateSet(DOM_STATE_RUNNING)
1759 except VmError, exn:
1760 log.exception("XendDomainInfo.initDomain: exception occurred")
1761 if self.image:
1762 self.image.cleanupBootloading()
1763 raise exn
1764 except RuntimeError, exn:
1765 log.exception("XendDomainInfo.initDomain: exception occurred")
1766 if self.image:
1767 self.image.cleanupBootloading()
1768 raise VmError(str(exn))
1771 def cleanupDomain(self):
1772 """Cleanup domain resources; release devices. Idempotent. Nothrow
1773 guarantee."""
1775 self.refresh_shutdown_lock.acquire()
1776 try:
1777 self.unwatchShutdown()
1778 self._releaseDevices()
1779 bootloader_tidy(self)
1781 if self.image:
1782 self.image = None
1784 try:
1785 self._removeDom()
1786 except:
1787 log.exception("Removing domain path failed.")
1789 self._stateSet(DOM_STATE_HALTED)
1790 self.domid = None # Do not push into _stateSet()!
1791 finally:
1792 self.refresh_shutdown_lock.release()
1795 def unwatchShutdown(self):
1796 """Remove the watch on the domain's control/shutdown node, if any.
1797 Idempotent. Nothrow guarantee. Expects to be protected by the
1798 refresh_shutdown_lock."""
1800 try:
1801 try:
1802 if self.shutdownWatch:
1803 self.shutdownWatch.unwatch()
1804 finally:
1805 self.shutdownWatch = None
1806 except:
1807 log.exception("Unwatching control/shutdown failed.")
1809 def waitForShutdown(self):
1810 self.state_updated.acquire()
1811 try:
1812 while self._stateGet() in (DOM_STATE_RUNNING,DOM_STATE_PAUSED):
1813 self.state_updated.wait()
1814 finally:
1815 self.state_updated.release()
1818 # TODO: recategorise - called from XendCheckpoint
1821 def completeRestore(self, store_mfn, console_mfn):
1823 log.debug("XendDomainInfo.completeRestore")
1825 self.store_mfn = store_mfn
1826 self.console_mfn = console_mfn
1828 self._introduceDomain()
1829 self.image = image.create(self, self.info)
1830 if self.image:
1831 self.image.createDeviceModel(True)
1832 self._storeDomDetails()
1833 self._registerWatches()
1834 self.refreshShutdown()
1836 log.debug("XendDomainInfo.completeRestore done")
1839 def _endRestore(self):
1840 self.setResume(False)
1843 # VM Destroy
1846 def _prepare_phantom_paths(self):
1847 # get associated devices to destroy
1848 # build list of phantom devices to be removed after normal devices
1849 plist = []
1850 if self.domid is not None:
1851 from xen.xend.xenstore.xstransact import xstransact
1852 t = xstransact("%s/device/vbd" % GetDomainPath(self.domid))
1853 for dev in t.list():
1854 backend_phantom_vbd = xstransact.Read("%s/device/vbd/%s/phantom_vbd" \
1855 % (self.dompath, dev))
1856 if backend_phantom_vbd is not None:
1857 frontend_phantom_vbd = xstransact.Read("%s/frontend" \
1858 % backend_phantom_vbd)
1859 plist.append(backend_phantom_vbd)
1860 plist.append(frontend_phantom_vbd)
1861 return plist
1863 def _cleanup_phantom_devs(self, plist):
1864 # remove phantom devices
1865 if not plist == []:
1866 time.sleep(2)
1867 for paths in plist:
1868 if paths.find('backend') != -1:
1869 from xen.xend.server import DevController
1870 # Modify online status /before/ updating state (latter is watched by
1871 # drivers, so this ordering avoids a race).
1872 xstransact.Write(paths, 'online', "0")
1873 xstransact.Write(paths, 'state', str(DevController.xenbusState['Closing']))
1874 # force
1875 xstransact.Remove(paths)
1877 def destroy(self):
1878 """Cleanup VM and destroy domain. Nothrow guarantee."""
1880 log.debug("XendDomainInfo.destroy: domid=%s", str(self.domid))
1882 paths = self._prepare_phantom_paths()
1884 self._cleanupVm()
1885 if self.dompath is not None:
1886 self.destroyDomain()
1888 self._cleanup_phantom_devs(paths)
1890 if "transient" in self.info["other_config"] \
1891 and bool(self.info["other_config"]["transient"]):
1892 from xen.xend import XendDomain
1893 XendDomain.instance().domain_delete_by_dominfo(self)
1896 def destroyDomain(self):
1897 log.debug("XendDomainInfo.destroyDomain(%s)", str(self.domid))
1899 paths = self._prepare_phantom_paths()
1901 try:
1902 if self.domid is not None:
1903 xc.domain_destroy_hook(self.domid)
1904 xc.domain_destroy(self.domid)
1905 for state in DOM_STATES_OLD:
1906 self.info[state] = 0
1907 self._stateSet(DOM_STATE_HALTED)
1908 except:
1909 log.exception("XendDomainInfo.destroy: xc.domain_destroy failed.")
1911 from xen.xend import XendDomain
1912 XendDomain.instance().remove_domain(self)
1914 self.cleanupDomain()
1915 self._cleanup_phantom_devs(paths)
1918 def resumeDomain(self):
1919 log.debug("XendDomainInfo.resumeDomain(%s)", str(self.domid))
1921 if self.domid is None:
1922 return
1923 try:
1924 # could also fetch a parsed note from xenstore
1925 fast = self.info.get_notes().get('SUSPEND_CANCEL') and 1 or 0
1926 if not fast:
1927 self._releaseDevices()
1928 self.testDeviceComplete()
1929 self.testvifsComplete()
1930 log.debug("XendDomainInfo.resumeDomain: devices released")
1932 self._resetChannels()
1934 self._removeDom('control/shutdown')
1935 self._removeDom('device-misc/vif/nextDeviceID')
1937 self._createChannels()
1938 self._introduceDomain()
1939 self._storeDomDetails()
1941 self._createDevices()
1942 log.debug("XendDomainInfo.resumeDomain: devices created")
1944 xc.domain_resume(self.domid, fast)
1945 ResumeDomain(self.domid)
1946 except:
1947 log.exception("XendDomainInfo.resume: xc.domain_resume failed on domain %s." % (str(self.domid)))
1948 self.image.resumeDeviceModel()
1949 log.debug("XendDomainInfo.resumeDomain: completed")
1953 # Channels for xenstore and console
1956 def _createChannels(self):
1957 """Create the channels to the domain.
1958 """
1959 self.store_port = self._createChannel()
1960 self.console_port = self._createChannel()
1963 def _createChannel(self):
1964 """Create an event channel to the domain.
1965 """
1966 try:
1967 if self.domid != None:
1968 return xc.evtchn_alloc_unbound(domid = self.domid,
1969 remote_dom = 0)
1970 except:
1971 log.exception("Exception in alloc_unbound(%s)", str(self.domid))
1972 raise
1974 def _resetChannels(self):
1975 """Reset all event channels in the domain.
1976 """
1977 try:
1978 if self.domid != None:
1979 return xc.evtchn_reset(dom = self.domid)
1980 except:
1981 log.exception("Exception in evtcnh_reset(%s)", str(self.domid))
1982 raise
1986 # Bootloader configuration
1989 def _configureBootloader(self):
1990 """Run the bootloader if we're configured to do so."""
1992 blexec = self.info['PV_bootloader']
1993 bootloader_args = self.info['PV_bootloader_args']
1994 kernel = self.info['PV_kernel']
1995 ramdisk = self.info['PV_ramdisk']
1996 args = self.info['PV_args']
1997 boot = self.info['HVM_boot_policy']
1999 if boot:
2000 # HVM booting.
2001 pass
2002 elif not blexec and kernel:
2003 # Boot from dom0. Nothing left to do -- the kernel and ramdisk
2004 # will be picked up by image.py.
2005 pass
2006 else:
2007 # Boot using bootloader
2008 if not blexec or blexec == 'pygrub':
2009 blexec = osdep.pygrub_path
2011 blcfg = None
2012 disks = [x for x in self.info['vbd_refs']
2013 if self.info['devices'][x][1]['bootable']]
2015 if not disks:
2016 msg = "Had a bootloader specified, but no disks are bootable"
2017 log.error(msg)
2018 raise VmError(msg)
2020 devinfo = self.info['devices'][disks[0]]
2021 devtype = devinfo[0]
2022 disk = devinfo[1]['uname']
2024 fn = blkdev_uname_to_file(disk)
2025 taptype = blkdev_uname_to_taptype(disk)
2026 mounted = devtype == 'tap' and taptype != 'aio' and taptype != 'sync' and not os.stat(fn).st_rdev
2027 if mounted:
2028 # This is a file, not a device. pygrub can cope with a
2029 # file if it's raw, but if it's QCOW or other such formats
2030 # used through blktap, then we need to mount it first.
2032 log.info("Mounting %s on %s." %
2033 (fn, BOOTLOADER_LOOPBACK_DEVICE))
2035 vbd = {
2036 'mode': 'RO',
2037 'device': BOOTLOADER_LOOPBACK_DEVICE,
2040 from xen.xend import XendDomain
2041 dom0 = XendDomain.instance().privilegedDomain()
2042 dom0._waitForDeviceUUID(dom0.create_vbd(vbd, disk))
2043 fn = BOOTLOADER_LOOPBACK_DEVICE
2045 try:
2046 blcfg = bootloader(blexec, fn, self, False,
2047 bootloader_args, kernel, ramdisk, args)
2048 finally:
2049 if mounted:
2050 log.info("Unmounting %s from %s." %
2051 (fn, BOOTLOADER_LOOPBACK_DEVICE))
2053 dom0.destroyDevice('tap', BOOTLOADER_LOOPBACK_DEVICE)
2055 if blcfg is None:
2056 msg = "Had a bootloader specified, but can't find disk"
2057 log.error(msg)
2058 raise VmError(msg)
2060 self.info.update_with_image_sxp(blcfg, True)
2064 # VM Functions
2067 def _readVMDetails(self, params):
2068 """Read the specified parameters from the store.
2069 """
2070 try:
2071 return self._gatherVm(*params)
2072 except ValueError:
2073 # One of the int/float entries in params has a corresponding store
2074 # entry that is invalid. We recover, because older versions of
2075 # Xend may have put the entry there (memory/target, for example),
2076 # but this is in general a bad situation to have reached.
2077 log.exception(
2078 "Store corrupted at %s! Domain %d's configuration may be "
2079 "affected.", self.vmpath, self.domid)
2080 return []
2082 def _cleanupVm(self):
2083 """Cleanup VM resources. Idempotent. Nothrow guarantee."""
2085 self._unwatchVm()
2087 try:
2088 self._removeVm()
2089 except:
2090 log.exception("Removing VM path failed.")
2093 def checkLiveMigrateMemory(self):
2094 """ Make sure there's enough memory to migrate this domain """
2095 overhead_kb = 0
2096 if arch.type == "x86":
2097 # 1MB per vcpu plus 4Kib/Mib of RAM. This is higher than
2098 # the minimum that Xen would allocate if no value were given.
2099 overhead_kb = self.info['VCPUs_max'] * 1024 + \
2100 (self.info['memory_static_max'] / 1024 / 1024) * 4
2101 overhead_kb = ((overhead_kb + 1023) / 1024) * 1024
2102 # The domain might already have some shadow memory
2103 overhead_kb -= xc.shadow_mem_control(self.domid) * 1024
2104 if overhead_kb > 0:
2105 balloon.free(overhead_kb)
2107 def _unwatchVm(self):
2108 """Remove the watch on the VM path, if any. Idempotent. Nothrow
2109 guarantee."""
2110 try:
2111 try:
2112 if self.vmWatch:
2113 self.vmWatch.unwatch()
2114 finally:
2115 self.vmWatch = None
2116 except:
2117 log.exception("Unwatching VM path failed.")
2119 def testDeviceComplete(self):
2120 """ For Block IO migration safety we must ensure that
2121 the device has shutdown correctly, i.e. all blocks are
2122 flushed to disk
2123 """
2124 start = time.time()
2125 while True:
2126 test = 0
2127 diff = time.time() - start
2128 for i in self.getDeviceController('vbd').deviceIDs():
2129 test = 1
2130 log.info("Dev %s still active, looping...", i)
2131 time.sleep(0.1)
2133 if test == 0:
2134 break
2135 if diff >= MIGRATE_TIMEOUT:
2136 log.info("Dev still active but hit max loop timeout")
2137 break
2139 def testvifsComplete(self):
2140 """ In case vifs are released and then created for the same
2141 domain, we need to wait the device shut down.
2142 """
2143 start = time.time()
2144 while True:
2145 test = 0
2146 diff = time.time() - start
2147 for i in self.getDeviceController('vif').deviceIDs():
2148 test = 1
2149 log.info("Dev %s still active, looping...", i)
2150 time.sleep(0.1)
2152 if test == 0:
2153 break
2154 if diff >= MIGRATE_TIMEOUT:
2155 log.info("Dev still active but hit max loop timeout")
2156 break
2158 def _storeVmDetails(self):
2159 to_store = {}
2161 for key in XendConfig.LEGACY_XENSTORE_VM_PARAMS:
2162 info_key = XendConfig.LEGACY_CFG_TO_XENAPI_CFG.get(key, key)
2163 if self._infoIsSet(info_key):
2164 to_store[key] = str(self.info[info_key])
2166 if self._infoIsSet("static_memory_min"):
2167 to_store["memory"] = str(self.info["static_memory_min"])
2168 if self._infoIsSet("static_memory_max"):
2169 to_store["maxmem"] = str(self.info["static_memory_max"])
2171 image_sxpr = self.info.image_sxpr()
2172 if image_sxpr:
2173 to_store['image'] = sxp.to_string(image_sxpr)
2175 if not self._readVm('xend/restart_count'):
2176 to_store['xend/restart_count'] = str(0)
2178 log.debug("Storing VM details: %s", scrub_password(to_store))
2180 self._writeVm(to_store)
2181 self._setVmPermissions()
2184 def _setVmPermissions(self):
2185 """Allow the guest domain to read its UUID. We don't allow it to
2186 access any other entry, for security."""
2187 xstransact.SetPermissions('%s/uuid' % self.vmpath,
2188 { 'dom' : self.domid,
2189 'read' : True,
2190 'write' : False })
2193 # Utility functions
2196 def __getattr__(self, name):
2197 if name == "state":
2198 log.warn("Somebody tried to read XendDomainInfo.state... should us _stateGet()!!!")
2199 log.warn("".join(traceback.format_stack()))
2200 return self._stateGet()
2201 else:
2202 raise AttributeError()
2204 def __setattr__(self, name, value):
2205 if name == "state":
2206 log.warn("Somebody tried to set XendDomainInfo.state... should us _stateGet()!!!")
2207 log.warn("".join(traceback.format_stack()))
2208 self._stateSet(value)
2209 else:
2210 self.__dict__[name] = value
2212 def _stateSet(self, state):
2213 self.state_updated.acquire()
2214 try:
2215 # TODO Not sure this is correct...
2216 # _stateGet is live now. Why not fire event
2217 # even when it hasn't changed?
2218 if self._stateGet() != state:
2219 self.state_updated.notifyAll()
2220 import XendAPI
2221 XendAPI.event_dispatch('mod', 'VM', self.info['uuid'],
2222 'power_state')
2223 finally:
2224 self.state_updated.release()
2226 def _stateGet(self):
2227 # Lets try and reconsitute the state from xc
2228 # first lets try and get the domain info
2229 # from xc - this will tell us if the domain
2230 # exists
2231 info = dom_get(self.getDomid())
2232 if info is None or info['shutdown']:
2233 # We are either HALTED or SUSPENDED
2234 # check saved image exists
2235 from xen.xend import XendDomain
2236 managed_config_path = \
2237 XendDomain.instance()._managed_check_point_path( \
2238 self.get_uuid())
2239 if os.path.exists(managed_config_path):
2240 return XEN_API_VM_POWER_STATE_SUSPENDED
2241 else:
2242 return XEN_API_VM_POWER_STATE_HALTED
2243 else:
2244 # We are either RUNNING or PAUSED
2245 if info['paused']:
2246 return XEN_API_VM_POWER_STATE_PAUSED
2247 else:
2248 return XEN_API_VM_POWER_STATE_RUNNING
2250 def _infoIsSet(self, name):
2251 return name in self.info and self.info[name] is not None
2253 def _checkName(self, name):
2254 """Check if a vm name is valid. Valid names contain alphabetic
2255 characters, digits, or characters in '_-.:/+'.
2256 The same name cannot be used for more than one vm at the same time.
2258 @param name: name
2259 @raise: VmError if invalid
2260 """
2261 from xen.xend import XendDomain
2263 if name is None or name == '':
2264 raise VmError('Missing VM Name')
2266 if not re.search(r'^[A-Za-z0-9_\-\.\:\/\+]+$', name):
2267 raise VmError('Invalid VM Name')
2269 dom = XendDomain.instance().domain_lookup_nr(name)
2270 if dom and dom.info['uuid'] != self.info['uuid']:
2271 raise VmError("VM name '%s' already exists%s" %
2272 (name,
2273 dom.domid is not None and
2274 (" as domain %s" % str(dom.domid)) or ""))
2277 def update(self, info = None, refresh = True, transaction = None):
2278 """Update with info from xc.domain_getinfo().
2279 """
2280 log.trace("XendDomainInfo.update(%s) on domain %s", info,
2281 str(self.domid))
2283 if not info:
2284 info = dom_get(self.domid)
2285 if not info:
2286 return
2288 if info["maxmem_kb"] < 0:
2289 info["maxmem_kb"] = XendNode.instance() \
2290 .physinfo_dict()['total_memory'] * 1024
2292 #ssidref field not used any longer
2293 if 'ssidref' in info:
2294 info.pop('ssidref')
2296 # make sure state is reset for info
2297 # TODO: we should eventually get rid of old_dom_states
2299 self.info.update_config(info)
2300 self._update_consoles(transaction)
2302 if refresh:
2303 self.refreshShutdown(info)
2305 log.trace("XendDomainInfo.update done on domain %s: %s",
2306 str(self.domid), self.info)
2308 def sxpr(self, ignore_store = False, legacy_only = True):
2309 result = self.info.to_sxp(domain = self,
2310 ignore_devices = ignore_store,
2311 legacy_only = legacy_only)
2313 #if not ignore_store and self.dompath:
2314 # vnc_port = self.readDom('console/vnc-port')
2315 # if vnc_port is not None:
2316 # result.append(['device',
2317 # ['console', ['vnc-port', str(vnc_port)]]])
2319 return result
2321 # Xen API
2322 # ----------------------------------------------------------------
2324 def get_uuid(self):
2325 dom_uuid = self.info.get('uuid')
2326 if not dom_uuid: # if it doesn't exist, make one up
2327 dom_uuid = uuid.createString()
2328 self.info['uuid'] = dom_uuid
2329 return dom_uuid
2331 def get_memory_static_max(self):
2332 return self.info.get('memory_static_max', 0)
2333 def get_memory_static_min(self):
2334 return self.info.get('memory_static_min', 0)
2335 def get_memory_dynamic_max(self):
2336 return self.info.get('memory_dynamic_max', 0)
2337 def get_memory_dynamic_min(self):
2338 return self.info.get('memory_dynamic_min', 0)
2340 # only update memory-related config values if they maintain sanity
2341 def _safe_set_memory(self, key, newval):
2342 oldval = self.info.get(key, 0)
2343 try:
2344 self.info[key] = newval
2345 self.info._memory_sanity_check()
2346 except Exception, ex:
2347 self.info[key] = oldval
2348 raise
2350 def set_memory_static_max(self, val):
2351 self._safe_set_memory('memory_static_max', val)
2352 def set_memory_static_min(self, val):
2353 self._safe_set_memory('memory_static_min', val)
2354 def set_memory_dynamic_max(self, val):
2355 self._safe_set_memory('memory_dynamic_max', val)
2356 def set_memory_dynamic_min(self, val):
2357 self._safe_set_memory('memory_dynamic_min', val)
2359 def get_vcpus_params(self):
2360 if self.getDomid() is None:
2361 return self.info['vcpus_params']
2363 retval = xc.sched_credit_domain_get(self.getDomid())
2364 return retval
2365 def get_power_state(self):
2366 return XEN_API_VM_POWER_STATE[self._stateGet()]
2367 def get_platform(self):
2368 return self.info.get('platform', {})
2369 def get_pci_bus(self):
2370 return self.info.get('pci_bus', '')
2371 def get_tools_version(self):
2372 return self.info.get('tools_version', {})
2373 def get_metrics(self):
2374 return self.metrics.get_uuid();
2377 def get_security_label(self, xspol=None):
2378 import xen.util.xsm.xsm as security
2379 label = security.get_security_label(self, xspol)
2380 return label
2382 def set_security_label(self, seclab, old_seclab, xspol=None,
2383 xspol_old=None):
2384 """
2385 Set the security label of a domain from its old to
2386 a new value.
2387 @param seclab New security label formatted in the form
2388 <policy type>:<policy name>:<vm label>
2389 @param old_seclab The current security label that the
2390 VM must have.
2391 @param xspol An optional policy under which this
2392 update should be done. If not given,
2393 then the current active policy is used.
2394 @param xspol_old The old policy; only to be passed during
2395 the updating of a policy
2396 @return Returns return code, a string with errors from
2397 the hypervisor's operation, old label of the
2398 domain
2399 """
2400 rc = 0
2401 errors = ""
2402 old_label = ""
2403 new_ssidref = 0
2404 domid = self.getDomid()
2405 res_labels = None
2406 is_policy_update = (xspol_old != None)
2408 from xen.xend.XendXSPolicyAdmin import XSPolicyAdminInstance
2409 from xen.util import xsconstants
2411 state = self._stateGet()
2412 # Relabel only HALTED or RUNNING or PAUSED domains
2413 if domid != 0 and \
2414 state not in \
2415 [ DOM_STATE_HALTED, DOM_STATE_RUNNING, DOM_STATE_PAUSED, \
2416 DOM_STATE_SUSPENDED ]:
2417 log.warn("Relabeling domain not possible in state '%s'" %
2418 DOM_STATES[state])
2419 return (-xsconstants.XSERR_VM_WRONG_STATE, "", "", 0)
2421 # Remove security label. Works only for halted domains
2422 if not seclab or seclab == "":
2423 if state not in [ DOM_STATE_HALTED ]:
2424 return (-xsconstants.XSERR_VM_WRONG_STATE, "", "", 0)
2426 if self.info.has_key('security_label'):
2427 old_label = self.info['security_label']
2428 # Check label against expected one.
2429 if old_label != old_seclab:
2430 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2431 del self.info['security_label']
2432 xen.xend.XendDomain.instance().managed_config_save(self)
2433 return (xsconstants.XSERR_SUCCESS, "", "", 0)
2435 tmp = seclab.split(":")
2436 if len(tmp) != 3:
2437 return (-xsconstants.XSERR_BAD_LABEL_FORMAT, "", "", 0)
2438 typ, policy, label = tmp
2440 poladmin = XSPolicyAdminInstance()
2441 if not xspol:
2442 xspol = poladmin.get_policy_by_name(policy)
2444 if state in [ DOM_STATE_RUNNING, DOM_STATE_PAUSED ]:
2445 #if domain is running or paused try to relabel in hypervisor
2446 if not xspol:
2447 return (-xsconstants.XSERR_POLICY_NOT_LOADED, "", "", 0)
2449 if typ != xspol.get_type_name() or \
2450 policy != xspol.get_name():
2451 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2453 if typ == xsconstants.ACM_POLICY_ID:
2454 new_ssidref = xspol.vmlabel_to_ssidref(label)
2455 if new_ssidref == xsconstants.INVALID_SSIDREF:
2456 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2458 # Check that all used resources are accessible under the
2459 # new label
2460 if not is_policy_update and \
2461 not security.resources_compatible_with_vmlabel(xspol,
2462 self, label):
2463 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2465 #Check label against expected one. Can only do this
2466 # if the policy hasn't changed underneath in the meantime
2467 if xspol_old == None:
2468 old_label = self.get_security_label()
2469 if old_label != old_seclab:
2470 log.info("old_label != old_seclab: %s != %s" %
2471 (old_label, old_seclab))
2472 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2474 # relabel domain in the hypervisor
2475 rc, errors = security.relabel_domains([[domid, new_ssidref]])
2476 log.info("rc from relabeling in HV: %d" % rc)
2477 else:
2478 return (-xsconstants.XSERR_POLICY_TYPE_UNSUPPORTED, "", "", 0)
2480 if rc == 0:
2481 # HALTED, RUNNING or PAUSED
2482 if domid == 0:
2483 if xspol:
2484 self.info['security_label'] = seclab
2485 ssidref = poladmin.set_domain0_bootlabel(xspol, label)
2486 else:
2487 return (-xsconstants.XSERR_POLICY_NOT_LOADED, "", "", 0)
2488 else:
2489 if self.info.has_key('security_label'):
2490 old_label = self.info['security_label']
2491 # Check label against expected one, unless wildcard
2492 if old_label != old_seclab:
2493 return (-xsconstants.XSERR_BAD_LABEL, "", "", 0)
2495 self.info['security_label'] = seclab
2497 try:
2498 xen.xend.XendDomain.instance().managed_config_save(self)
2499 except:
2500 pass
2501 return (rc, errors, old_label, new_ssidref)
2503 def get_on_shutdown(self):
2504 after_shutdown = self.info.get('actions_after_shutdown')
2505 if not after_shutdown or after_shutdown not in XEN_API_ON_NORMAL_EXIT:
2506 return XEN_API_ON_NORMAL_EXIT[-1]
2507 return after_shutdown
2509 def get_on_reboot(self):
2510 after_reboot = self.info.get('actions_after_reboot')
2511 if not after_reboot or after_reboot not in XEN_API_ON_NORMAL_EXIT:
2512 return XEN_API_ON_NORMAL_EXIT[-1]
2513 return after_reboot
2515 def get_on_suspend(self):
2516 # TODO: not supported
2517 after_suspend = self.info.get('actions_after_suspend')
2518 if not after_suspend or after_suspend not in XEN_API_ON_NORMAL_EXIT:
2519 return XEN_API_ON_NORMAL_EXIT[-1]
2520 return after_suspend
2522 def get_on_crash(self):
2523 after_crash = self.info.get('actions_after_crash')
2524 if not after_crash or after_crash not in XEN_API_ON_CRASH_BEHAVIOUR:
2525 return XEN_API_ON_CRASH_BEHAVIOUR[0]
2526 return after_crash
2528 def get_dev_config_by_uuid(self, dev_class, dev_uuid):
2529 """ Get's a device configuration either from XendConfig or
2530 from the DevController.
2532 @param dev_class: device class, either, 'vbd' or 'vif'
2533 @param dev_uuid: device UUID
2535 @rtype: dictionary
2536 """
2537 dev_type, dev_config = self.info['devices'].get(dev_uuid, (None, None))
2539 # shortcut if the domain isn't started because
2540 # the devcontrollers will have no better information
2541 # than XendConfig.
2542 if self._stateGet() in (XEN_API_VM_POWER_STATE_HALTED,):
2543 if dev_config:
2544 return copy.deepcopy(dev_config)
2545 return None
2547 # instead of using dev_class, we use the dev_type
2548 # that is from XendConfig.
2549 controller = self.getDeviceController(dev_type)
2550 if not controller:
2551 return None
2553 all_configs = controller.getAllDeviceConfigurations()
2554 if not all_configs:
2555 return None
2557 updated_dev_config = copy.deepcopy(dev_config)
2558 for _devid, _devcfg in all_configs.items():
2559 if _devcfg.get('uuid') == dev_uuid:
2560 updated_dev_config.update(_devcfg)
2561 updated_dev_config['id'] = _devid
2562 return updated_dev_config
2564 return updated_dev_config
2566 def get_dev_xenapi_config(self, dev_class, dev_uuid):
2567 config = self.get_dev_config_by_uuid(dev_class, dev_uuid)
2568 if not config:
2569 return {}
2571 config['VM'] = self.get_uuid()
2573 if dev_class == 'vif':
2574 if not config.has_key('name'):
2575 config['name'] = config.get('vifname', '')
2576 if not config.has_key('MAC'):
2577 config['MAC'] = config.get('mac', '')
2578 if not config.has_key('type'):
2579 config['type'] = 'paravirtualised'
2580 if not config.has_key('device'):
2581 devid = config.get('id')
2582 if devid != None:
2583 config['device'] = 'eth%d' % devid
2584 else:
2585 config['device'] = ''
2587 if not config.has_key('network'):
2588 try:
2589 bridge = config.get('bridge', None)
2590 if bridge is None:
2591 from xen.util import Brctl
2592 if_to_br = dict([(i,b)
2593 for (b,ifs) in Brctl.get_state().items()
2594 for i in ifs])
2595 vifname = "vif%s.%s" % (self.getDomid(),
2596 config.get('id'))
2597 bridge = if_to_br.get(vifname, None)
2598 config['network'] = \
2599 XendNode.instance().bridge_to_network(
2600 config.get('bridge')).get_uuid()
2601 except Exception:
2602 log.exception('bridge_to_network')
2603 # Ignore this for now -- it may happen if the device
2604 # has been specified using the legacy methods, but at
2605 # some point we're going to have to figure out how to
2606 # handle that properly.
2608 config['MTU'] = 1500 # TODO
2610 if self._stateGet() not in (XEN_API_VM_POWER_STATE_HALTED,):
2611 xennode = XendNode.instance()
2612 rx_bps, tx_bps = xennode.get_vif_util(self.domid, devid)
2613 config['io_read_kbs'] = rx_bps/1024
2614 config['io_write_kbs'] = tx_bps/1024
2615 rx, tx = xennode.get_vif_stat(self.domid, devid)
2616 config['io_total_read_kbs'] = rx/1024
2617 config['io_total_write_kbs'] = tx/1024
2618 else:
2619 config['io_read_kbs'] = 0.0
2620 config['io_write_kbs'] = 0.0
2621 config['io_total_read_kbs'] = 0.0
2622 config['io_total_write_kbs'] = 0.0
2624 config['security_label'] = config.get('security_label', '')
2626 if dev_class == 'vbd':
2628 if self._stateGet() not in (XEN_API_VM_POWER_STATE_HALTED,):
2629 controller = self.getDeviceController(dev_class)
2630 devid, _1, _2 = controller.getDeviceDetails(config)
2631 xennode = XendNode.instance()
2632 rd_blkps, wr_blkps = xennode.get_vbd_util(self.domid, devid)
2633 config['io_read_kbs'] = rd_blkps
2634 config['io_write_kbs'] = wr_blkps
2635 else:
2636 config['io_read_kbs'] = 0.0
2637 config['io_write_kbs'] = 0.0
2639 config['VDI'] = config.get('VDI', '')
2640 config['device'] = config.get('dev', '')
2641 if ':' in config['device']:
2642 vbd_name, vbd_type = config['device'].split(':', 1)
2643 config['device'] = vbd_name
2644 if vbd_type == 'cdrom':
2645 config['type'] = XEN_API_VBD_TYPE[0]
2646 else:
2647 config['type'] = XEN_API_VBD_TYPE[1]
2649 config['driver'] = 'paravirtualised' # TODO
2650 config['image'] = config.get('uname', '')
2652 if config.get('mode', 'r') == 'r':
2653 config['mode'] = 'RO'
2654 else:
2655 config['mode'] = 'RW'
2657 if dev_class == 'vtpm':
2658 if not config.has_key('type'):
2659 config['type'] = 'paravirtualised' # TODO
2660 if not config.has_key('backend'):
2661 config['backend'] = "00000000-0000-0000-0000-000000000000"
2663 return config
2665 def get_dev_property(self, dev_class, dev_uuid, field):
2666 config = self.get_dev_xenapi_config(dev_class, dev_uuid)
2667 try:
2668 return config[field]
2669 except KeyError:
2670 raise XendError('Invalid property for device: %s' % field)
2672 def set_dev_property(self, dev_class, dev_uuid, field, value):
2673 self.info['devices'][dev_uuid][1][field] = value
2675 def get_vcpus_util(self):
2676 vcpu_util = {}
2677 xennode = XendNode.instance()
2678 if 'VCPUs_max' in self.info and self.domid != None:
2679 for i in range(0, self.info['VCPUs_max']):
2680 util = xennode.get_vcpu_util(self.domid, i)
2681 vcpu_util[str(i)] = util
2683 return vcpu_util
2685 def get_consoles(self):
2686 return self.info.get('console_refs', [])
2688 def get_vifs(self):
2689 return self.info.get('vif_refs', [])
2691 def get_vbds(self):
2692 return self.info.get('vbd_refs', [])
2694 def get_vtpms(self):
2695 return self.info.get('vtpm_refs', [])
2697 def create_vbd(self, xenapi_vbd, vdi_image_path):
2698 """Create a VBD using a VDI from XendStorageRepository.
2700 @param xenapi_vbd: vbd struct from the Xen API
2701 @param vdi_image_path: VDI UUID
2702 @rtype: string
2703 @return: uuid of the device
2704 """
2705 xenapi_vbd['image'] = vdi_image_path
2706 if vdi_image_path.startswith('tap'):
2707 dev_uuid = self.info.device_add('tap', cfg_xenapi = xenapi_vbd)
2708 else:
2709 dev_uuid = self.info.device_add('vbd', cfg_xenapi = xenapi_vbd)
2711 if not dev_uuid:
2712 raise XendError('Failed to create device')
2714 if self._stateGet() in (XEN_API_VM_POWER_STATE_RUNNING,
2715 XEN_API_VM_POWER_STATE_PAUSED):
2716 _, config = self.info['devices'][dev_uuid]
2718 if vdi_image_path.startswith('tap'):
2719 dev_control = self.getDeviceController('tap')
2720 else:
2721 dev_control = self.getDeviceController('vbd')
2723 try:
2724 devid = dev_control.createDevice(config)
2725 dev_control.waitForDevice(devid)
2726 self.info.device_update(dev_uuid,
2727 cfg_xenapi = {'devid': devid})
2728 except Exception, exn:
2729 log.exception(exn)
2730 del self.info['devices'][dev_uuid]
2731 self.info['vbd_refs'].remove(dev_uuid)
2732 raise
2734 return dev_uuid
2736 def create_phantom_vbd_with_vdi(self, xenapi_vbd, vdi_image_path):
2737 """Create a VBD using a VDI from XendStorageRepository.
2739 @param xenapi_vbd: vbd struct from the Xen API
2740 @param vdi_image_path: VDI UUID
2741 @rtype: string
2742 @return: uuid of the device
2743 """
2744 xenapi_vbd['image'] = vdi_image_path
2745 dev_uuid = self.info.phantom_device_add('tap', cfg_xenapi = xenapi_vbd)
2746 if not dev_uuid:
2747 raise XendError('Failed to create device')
2749 if self._stateGet() == XEN_API_VM_POWER_STATE_RUNNING:
2750 _, config = self.info['devices'][dev_uuid]
2751 config['devid'] = self.getDeviceController('tap').createDevice(config)
2753 return config['devid']
2755 def create_vif(self, xenapi_vif):
2756 """Create VIF device from the passed struct in Xen API format.
2758 @param xenapi_vif: Xen API VIF Struct.
2759 @rtype: string
2760 @return: UUID
2761 """
2762 dev_uuid = self.info.device_add('vif', cfg_xenapi = xenapi_vif)
2763 if not dev_uuid:
2764 raise XendError('Failed to create device')
2766 if self._stateGet() in (XEN_API_VM_POWER_STATE_RUNNING,
2767 XEN_API_VM_POWER_STATE_PAUSED):
2769 _, config = self.info['devices'][dev_uuid]
2770 dev_control = self.getDeviceController('vif')
2772 try:
2773 devid = dev_control.createDevice(config)
2774 dev_control.waitForDevice(devid)
2775 self.info.device_update(dev_uuid,
2776 cfg_xenapi = {'devid': devid})
2777 except Exception, exn:
2778 log.exception(exn)
2779 del self.info['devices'][dev_uuid]
2780 self.info['vif_refs'].remove(dev_uuid)
2781 raise
2783 return dev_uuid
2785 def create_vtpm(self, xenapi_vtpm):
2786 """Create a VTPM device from the passed struct in Xen API format.
2788 @return: uuid of the device
2789 @rtype: string
2790 """
2792 if self._stateGet() not in (DOM_STATE_HALTED,):
2793 raise VmError("Can only add vTPM to a halted domain.")
2794 if self.get_vtpms() != []:
2795 raise VmError('Domain already has a vTPM.')
2796 dev_uuid = self.info.device_add('vtpm', cfg_xenapi = xenapi_vtpm)
2797 if not dev_uuid:
2798 raise XendError('Failed to create device')
2800 return dev_uuid
2802 def create_console(self, xenapi_console):
2803 """ Create a console device from a Xen API struct.
2805 @return: uuid of device
2806 @rtype: string
2807 """
2808 if self._stateGet() not in (DOM_STATE_HALTED,):
2809 raise VmError("Can only add console to a halted domain.")
2811 dev_uuid = self.info.device_add('console', cfg_xenapi = xenapi_console)
2812 if not dev_uuid:
2813 raise XendError('Failed to create device')
2815 return dev_uuid
2817 def set_console_other_config(self, console_uuid, other_config):
2818 self.info.console_update(console_uuid, 'other_config', other_config)
2820 def destroy_device_by_uuid(self, dev_type, dev_uuid):
2821 if dev_uuid not in self.info['devices']:
2822 raise XendError('Device does not exist')
2824 try:
2825 if self._stateGet() in (XEN_API_VM_POWER_STATE_RUNNING,
2826 XEN_API_VM_POWER_STATE_PAUSED):
2827 _, config = self.info['devices'][dev_uuid]
2828 devid = config.get('devid')
2829 if devid != None:
2830 self.getDeviceController(dev_type).destroyDevice(devid, force = False)
2831 else:
2832 raise XendError('Unable to get devid for device: %s:%s' %
2833 (dev_type, dev_uuid))
2834 finally:
2835 del self.info['devices'][dev_uuid]
2836 self.info['%s_refs' % dev_type].remove(dev_uuid)
2838 def destroy_vbd(self, dev_uuid):
2839 self.destroy_device_by_uuid('vbd', dev_uuid)
2841 def destroy_vif(self, dev_uuid):
2842 self.destroy_device_by_uuid('vif', dev_uuid)
2844 def destroy_vtpm(self, dev_uuid):
2845 self.destroy_device_by_uuid('vtpm', dev_uuid)
2847 def has_device(self, dev_class, dev_uuid):
2848 return (dev_uuid in self.info['%s_refs' % dev_class.lower()])
2850 def __str__(self):
2851 return '<domain id=%s name=%s memory=%s state=%s>' % \
2852 (str(self.domid), self.info['name_label'],
2853 str(self.info['memory_dynamic_max']), DOM_STATES[self._stateGet()])
2855 __repr__ = __str__