4 # Copyright (C) 2006, 2007 Google Inc.
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 2 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful, but
12 # WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 # General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program; if not, write to the Free Software
18 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
22 """Functions used by the node daemon"""
39 from ganeti import errors
40 from ganeti import utils
41 from ganeti import ssh
42 from ganeti import hypervisor
43 from ganeti import constants
44 from ganeti import bdev
45 from ganeti import objects
46 from ganeti import ssconf
50 """Simple wrapper to return a SimpleStore.
52 @rtype: L{ssconf.SimpleStore}
53 @return: a SimpleStore instance
56 return ssconf.SimpleStore()
59 def _GetSshRunner(cluster_name):
60 """Simple wrapper to return an SshRunner.
62 @type cluster_name: str
63 @param cluster_name: the cluster name, which is needed
64 by the SshRunner constructor
65 @rtype: L{ssh.SshRunner}
66 @return: an SshRunner instance
69 return ssh.SshRunner(cluster_name)
72 def _Decompress(data):
73 """Unpacks data compressed by the RPC client.
75 @type data: list or tuple
76 @param data: Data sent by RPC client
78 @return: Decompressed data
81 assert isinstance(data, (list, tuple))
83 (encoding, content) = data
84 if encoding == constants.RPC_ENCODING_NONE:
86 elif encoding == constants.RPC_ENCODING_ZLIB_BASE64:
87 return zlib.decompress(base64.b64decode(content))
89 raise AssertionError("Unknown data encoding")
92 def _CleanDirectory(path, exclude=None):
93 """Removes all regular files in a directory.
96 @param path: the directory to clean
98 @param exclude: list of files to be excluded, defaults
102 if not os.path.isdir(path):
107 # Normalize excluded paths
108 exclude = [os.path.normpath(i) for i in exclude]
110 for rel_name in utils.ListVisibleFiles(path):
111 full_name = os.path.normpath(os.path.join(path, rel_name))
112 if full_name in exclude:
114 if os.path.isfile(full_name) and not os.path.islink(full_name):
115 utils.RemoveFile(full_name)
119 """Removes job queue files and archived jobs.
124 _CleanDirectory(constants.QUEUE_DIR, exclude=[constants.JOB_QUEUE_LOCK_FILE])
125 _CleanDirectory(constants.JOB_QUEUE_ARCHIVE_DIR)
129 """Returns master information.
131 This is an utility function to compute master information, either
132 for consumption here or from the node daemon.
135 @return: (master_netdev, master_ip, master_name) if we have a good
136 configuration, otherwise (None, None, None)
141 master_netdev = cfg.GetMasterNetdev()
142 master_ip = cfg.GetMasterIP()
143 master_node = cfg.GetMasterNode()
144 except errors.ConfigurationError, err:
145 logging.exception("Cluster configuration incomplete")
146 return (None, None, None)
147 return (master_netdev, master_ip, master_node)
150 def StartMaster(start_daemons):
151 """Activate local node as master node.
153 The function will always try activate the IP address of the master
154 (unless someone else has it). It will also start the master daemons,
155 based on the start_daemons parameter.
157 @type start_daemons: boolean
158 @param start_daemons: whther to also start the master
159 daemons (ganeti-masterd and ganeti-rapi)
164 master_netdev, master_ip, _ = GetMasterInfo()
165 if not master_netdev:
168 if utils.TcpPing(master_ip, constants.DEFAULT_NODED_PORT):
169 if utils.OwnIpAddress(master_ip):
170 # we already have the ip:
171 logging.debug("Already started")
173 logging.error("Someone else has the master ip, not activating")
176 result = utils.RunCmd(["ip", "address", "add", "%s/32" % master_ip,
177 "dev", master_netdev, "label",
178 "%s:0" % master_netdev])
180 logging.error("Can't activate master IP: %s", result.output)
183 result = utils.RunCmd(["arping", "-q", "-U", "-c 3", "-I", master_netdev,
184 "-s", master_ip, master_ip])
185 # we'll ignore the exit code of arping
187 # and now start the master and rapi daemons
189 for daemon in 'ganeti-masterd', 'ganeti-rapi':
190 result = utils.RunCmd([daemon])
192 logging.error("Can't start daemon %s: %s", daemon, result.output)
197 def StopMaster(stop_daemons):
198 """Deactivate this node as master.
200 The function will always try to deactivate the IP address of the
201 master. It will also stop the master daemons depending on the
202 stop_daemons parameter.
204 @type stop_daemons: boolean
205 @param stop_daemons: whether to also stop the master daemons
206 (ganeti-masterd and ganeti-rapi)
210 master_netdev, master_ip, _ = GetMasterInfo()
211 if not master_netdev:
214 result = utils.RunCmd(["ip", "address", "del", "%s/32" % master_ip,
215 "dev", master_netdev])
217 logging.error("Can't remove the master IP, error: %s", result.output)
218 # but otherwise ignore the failure
221 # stop/kill the rapi and the master daemon
222 for daemon in constants.RAPI_PID, constants.MASTERD_PID:
223 utils.KillProcess(utils.ReadPidFile(utils.DaemonPidFileName(daemon)))
228 def AddNode(dsa, dsapub, rsa, rsapub, sshkey, sshpub):
229 """Joins this node to the cluster.
231 This does the following:
232 - updates the hostkeys of the machine (rsa and dsa)
233 - adds the ssh private key to the user
234 - adds the ssh public key to the users' authorized_keys file
237 @param dsa: the DSA private key to write
239 @param dsapub: the DSA public key to write
241 @param rsa: the RSA private key to write
243 @param rsapub: the RSA public key to write
245 @param sshkey: the SSH private key to write
247 @param sshpub: the SSH public key to write
249 @return: the success of the operation
252 sshd_keys = [(constants.SSH_HOST_RSA_PRIV, rsa, 0600),
253 (constants.SSH_HOST_RSA_PUB, rsapub, 0644),
254 (constants.SSH_HOST_DSA_PRIV, dsa, 0600),
255 (constants.SSH_HOST_DSA_PUB, dsapub, 0644)]
256 for name, content, mode in sshd_keys:
257 utils.WriteFile(name, data=content, mode=mode)
260 priv_key, pub_key, auth_keys = ssh.GetUserFiles(constants.GANETI_RUNAS,
262 except errors.OpExecError, err:
263 msg = "Error while processing user ssh files"
264 logging.exception(msg)
265 return (False, "%s: %s" % (msg, err))
267 for name, content in [(priv_key, sshkey), (pub_key, sshpub)]:
268 utils.WriteFile(name, data=content, mode=0600)
270 utils.AddAuthorizedKey(auth_keys, sshpub)
272 utils.RunCmd([constants.SSH_INITD_SCRIPT, "restart"])
274 return (True, "Node added successfully")
278 """Cleans up and remove the current node.
280 This function cleans up and prepares the current node to be removed
283 If processing is successful, then it raises an
284 L{errors.QuitGanetiException} which is used as a special case to
285 shutdown the node daemon.
288 _CleanDirectory(constants.DATA_DIR)
292 priv_key, pub_key, auth_keys = ssh.GetUserFiles(constants.GANETI_RUNAS)
293 except errors.OpExecError:
294 logging.exception("Error while processing ssh files")
297 f = open(pub_key, 'r')
299 utils.RemoveAuthorizedKey(auth_keys, f.read(8192))
303 utils.RemoveFile(priv_key)
304 utils.RemoveFile(pub_key)
306 # Return a reassuring string to the caller, and quit
307 raise errors.QuitGanetiException(False, 'Shutdown scheduled')
310 def GetNodeInfo(vgname, hypervisor_type):
311 """Gives back a hash with different informations about the node.
313 @type vgname: C{string}
314 @param vgname: the name of the volume group to ask for disk space information
315 @type hypervisor_type: C{str}
316 @param hypervisor_type: the name of the hypervisor to ask for
319 @return: dictionary with the following keys:
320 - vg_size is the size of the configured volume group in MiB
321 - vg_free is the free size of the volume group in MiB
322 - memory_dom0 is the memory allocated for domain0 in MiB
323 - memory_free is the currently available (free) ram in MiB
324 - memory_total is the total number of ram in MiB
328 vginfo = _GetVGInfo(vgname)
329 outputarray['vg_size'] = vginfo['vg_size']
330 outputarray['vg_free'] = vginfo['vg_free']
332 hyper = hypervisor.GetHypervisor(hypervisor_type)
333 hyp_info = hyper.GetNodeInfo()
334 if hyp_info is not None:
335 outputarray.update(hyp_info)
337 f = open("/proc/sys/kernel/random/boot_id", 'r')
339 outputarray["bootid"] = f.read(128).rstrip("\n")
346 def VerifyNode(what, cluster_name):
347 """Verify the status of the local node.
349 Based on the input L{what} parameter, various checks are done on the
352 If the I{filelist} key is present, this list of
353 files is checksummed and the file/checksum pairs are returned.
355 If the I{nodelist} key is present, we check that we have
356 connectivity via ssh with the target nodes (and check the hostname
359 If the I{node-net-test} key is present, we check that we have
360 connectivity to the given nodes via both primary IP and, if
361 applicable, secondary IPs.
364 @param what: a dictionary of things to check:
365 - filelist: list of files for which to compute checksums
366 - nodelist: list of nodes we should check ssh communication with
367 - node-net-test: list of nodes we should check node daemon port
369 - hypervisor: list with hypervisors to run the verify for
371 @return: a dictionary with the same keys as the input dict, and
372 values representing the result of the checks
377 if constants.NV_HYPERVISOR in what:
378 result[constants.NV_HYPERVISOR] = tmp = {}
379 for hv_name in what[constants.NV_HYPERVISOR]:
380 tmp[hv_name] = hypervisor.GetHypervisor(hv_name).Verify()
382 if constants.NV_FILELIST in what:
383 result[constants.NV_FILELIST] = utils.FingerprintFiles(
384 what[constants.NV_FILELIST])
386 if constants.NV_NODELIST in what:
387 result[constants.NV_NODELIST] = tmp = {}
388 random.shuffle(what[constants.NV_NODELIST])
389 for node in what[constants.NV_NODELIST]:
390 success, message = _GetSshRunner(cluster_name).VerifyNodeHostname(node)
394 if constants.NV_NODENETTEST in what:
395 result[constants.NV_NODENETTEST] = tmp = {}
396 my_name = utils.HostInfo().name
397 my_pip = my_sip = None
398 for name, pip, sip in what[constants.NV_NODENETTEST]:
404 tmp[my_name] = ("Can't find my own primary/secondary IP"
407 port = utils.GetNodeDaemonPort()
408 for name, pip, sip in what[constants.NV_NODENETTEST]:
410 if not utils.TcpPing(pip, port, source=my_pip):
411 fail.append("primary")
413 if not utils.TcpPing(sip, port, source=my_sip):
414 fail.append("secondary")
416 tmp[name] = ("failure using the %s interface(s)" %
419 if constants.NV_LVLIST in what:
420 result[constants.NV_LVLIST] = GetVolumeList(what[constants.NV_LVLIST])
422 if constants.NV_INSTANCELIST in what:
423 result[constants.NV_INSTANCELIST] = GetInstanceList(
424 what[constants.NV_INSTANCELIST])
426 if constants.NV_VGLIST in what:
427 result[constants.NV_VGLIST] = ListVolumeGroups()
429 if constants.NV_VERSION in what:
430 result[constants.NV_VERSION] = (constants.PROTOCOL_VERSION,
431 constants.RELEASE_VERSION)
433 if constants.NV_HVINFO in what:
434 hyper = hypervisor.GetHypervisor(what[constants.NV_HVINFO])
435 result[constants.NV_HVINFO] = hyper.GetNodeInfo()
437 if constants.NV_DRBDLIST in what:
439 used_minors = bdev.DRBD8.GetUsedDevs().keys()
440 except errors.BlockDeviceError, err:
441 logging.warning("Can't get used minors list", exc_info=True)
442 used_minors = str(err)
443 result[constants.NV_DRBDLIST] = used_minors
448 def GetVolumeList(vg_name):
449 """Compute list of logical volumes and their size.
452 @param vg_name: the volume group whose LVs we should list
455 dictionary of all partions (key) with value being a tuple of
456 their size (in MiB), inactive and online status::
458 {'test1': ('20.06', True, True)}
460 in case of errors, a string is returned with the error
466 result = utils.RunCmd(["lvs", "--noheadings", "--units=m", "--nosuffix",
467 "--separator=%s" % sep,
468 "-olv_name,lv_size,lv_attr", vg_name])
470 logging.error("Failed to list logical volumes, lvs output: %s",
474 valid_line_re = re.compile("^ *([^|]+)\|([0-9.]+)\|([^|]{6})\|?$")
475 for line in result.stdout.splitlines():
477 match = valid_line_re.match(line)
479 logging.error("Invalid line returned from lvs output: '%s'", line)
481 name, size, attr = match.groups()
482 inactive = attr[4] == '-'
483 online = attr[5] == 'o'
484 lvs[name] = (size, inactive, online)
489 def ListVolumeGroups():
490 """List the volume groups and their size.
493 @return: dictionary with keys volume name and values the
497 return utils.ListVolumeGroups()
501 """List all volumes on this node.
505 A list of dictionaries, each having four keys:
506 - name: the logical volume name,
507 - size: the size of the logical volume
508 - dev: the physical device on which the LV lives
509 - vg: the volume group to which it belongs
511 In case of errors, we return an empty list and log the
514 Note that since a logical volume can live on multiple physical
515 volumes, the resulting list might include a logical volume
519 result = utils.RunCmd(["lvs", "--noheadings", "--units=m", "--nosuffix",
521 "--options=lv_name,lv_size,devices,vg_name"])
523 logging.error("Failed to list logical volumes, lvs output: %s",
529 return dev.split('(')[0]
535 'name': line[0].strip(),
536 'size': line[1].strip(),
537 'dev': parse_dev(line[2].strip()),
538 'vg': line[3].strip(),
541 return [map_line(line.split('|')) for line in result.stdout.splitlines()
542 if line.count('|') >= 3]
545 def BridgesExist(bridges_list):
546 """Check if a list of bridges exist on the current node.
549 @return: C{True} if all of them exist, C{False} otherwise
552 for bridge in bridges_list:
553 if not utils.BridgeExists(bridge):
559 def GetInstanceList(hypervisor_list):
560 """Provides a list of instances.
562 @type hypervisor_list: list
563 @param hypervisor_list: the list of hypervisors to query information
566 @return: a list of all running instances on the current node
567 - instance1.example.com
568 - instance2.example.com
572 for hname in hypervisor_list:
574 names = hypervisor.GetHypervisor(hname).ListInstances()
575 results.extend(names)
576 except errors.HypervisorError, err:
577 logging.exception("Error enumerating instances for hypevisor %s", hname)
583 def GetInstanceInfo(instance, hname):
584 """Gives back the informations about an instance as a dictionary.
586 @type instance: string
587 @param instance: the instance name
589 @param hname: the hypervisor type of the instance
592 @return: dictionary with the following keys:
593 - memory: memory size of instance (int)
594 - state: xen state of instance (string)
595 - time: cpu time of instance (float)
600 iinfo = hypervisor.GetHypervisor(hname).GetInstanceInfo(instance)
601 if iinfo is not None:
602 output['memory'] = iinfo[2]
603 output['state'] = iinfo[4]
604 output['time'] = iinfo[5]
609 def GetInstanceMigratable(instance):
610 """Gives whether an instance can be migrated.
612 @type instance: L{objects.Instance}
613 @param instance: object representing the instance to be checked.
616 @return: tuple of (result, description) where:
617 - result: whether the instance can be migrated or not
618 - description: a description of the issue, if relevant
621 hyper = hypervisor.GetHypervisor(instance.hypervisor)
622 if instance.name not in hyper.ListInstances():
623 return (False, 'not running')
625 for idx in range(len(instance.disks)):
626 link_name = _GetBlockDevSymlinkPath(instance.name, idx)
627 if not os.path.islink(link_name):
628 return (False, 'not restarted since ganeti 1.2.5')
633 def GetAllInstancesInfo(hypervisor_list):
634 """Gather data about all instances.
636 This is the equivalent of L{GetInstanceInfo}, except that it
637 computes data for all instances at once, thus being faster if one
638 needs data about more than one instance.
640 @type hypervisor_list: list
641 @param hypervisor_list: list of hypervisors to query for instance data
644 @return: dictionary of instance: data, with data having the following keys:
645 - memory: memory size of instance (int)
646 - state: xen state of instance (string)
647 - time: cpu time of instance (float)
648 - vcpus: the number of vcpus
653 for hname in hypervisor_list:
654 iinfo = hypervisor.GetHypervisor(hname).GetAllInstancesInfo()
656 for name, inst_id, memory, vcpus, state, times in iinfo:
664 # we only check static parameters, like memory and vcpus,
665 # and not state and time which can change between the
666 # invocations of the different hypervisors
667 for key in 'memory', 'vcpus':
668 if value[key] != output[name][key]:
669 raise errors.HypervisorError("Instance %s is running twice"
670 " with different parameters" % name)
676 def InstanceOsAdd(instance):
677 """Add an OS to an instance.
679 @type instance: L{objects.Instance}
680 @param instance: Instance whose OS is to be installed
682 @return: the success of the operation
686 inst_os = OSFromDisk(instance.os)
687 except errors.InvalidOS, err:
688 os_name, os_dir, os_err = err.args
690 return (False, "Can't find OS '%s': %s" % (os_name, os_err))
692 return (False, "Error parsing OS '%s' in directory %s: %s" %
693 (os_name, os_dir, os_err))
695 create_env = OSEnvironment(instance)
697 logfile = "%s/add-%s-%s-%d.log" % (constants.LOG_OS_DIR, instance.os,
698 instance.name, int(time.time()))
700 result = utils.RunCmd([inst_os.create_script], env=create_env,
701 cwd=inst_os.path, output=logfile,)
703 logging.error("os create command '%s' returned error: %s, logfile: %s,"
704 " output: %s", result.cmd, result.fail_reason, logfile,
706 lines = [utils.SafeEncode(val)
707 for val in utils.TailFile(logfile, lines=20)]
708 return (False, "OS create script failed (%s), last lines in the"
709 " log file:\n%s" % (result.fail_reason, "\n".join(lines)))
711 return (True, "Successfully installed")
714 def RunRenameInstance(instance, old_name):
715 """Run the OS rename script for an instance.
717 @type instance: L{objects.Instance}
718 @param instance: Instance whose OS is to be installed
719 @type old_name: string
720 @param old_name: previous instance name
722 @return: the success of the operation
725 inst_os = OSFromDisk(instance.os)
727 rename_env = OSEnvironment(instance)
728 rename_env['OLD_INSTANCE_NAME'] = old_name
730 logfile = "%s/rename-%s-%s-%s-%d.log" % (constants.LOG_OS_DIR, instance.os,
732 instance.name, int(time.time()))
734 result = utils.RunCmd([inst_os.rename_script], env=rename_env,
735 cwd=inst_os.path, output=logfile)
738 logging.error("os create command '%s' returned error: %s output: %s",
739 result.cmd, result.fail_reason, result.output)
740 lines = [utils.SafeEncode(val)
741 for val in utils.TailFile(logfile, lines=20)]
742 return (False, "OS rename script failed (%s), last lines in the"
743 " log file:\n%s" % (result.fail_reason, "\n".join(lines)))
745 return (True, "Rename successful")
748 def _GetVGInfo(vg_name):
749 """Get informations about the volume group.
752 @param vg_name: the volume group which we query
755 A dictionary with the following keys:
756 - C{vg_size} is the total size of the volume group in MiB
757 - C{vg_free} is the free size of the volume group in MiB
758 - C{pv_count} are the number of physical disks in that VG
760 If an error occurs during gathering of data, we return the same dict
761 with keys all set to None.
764 retdic = dict.fromkeys(["vg_size", "vg_free", "pv_count"])
766 retval = utils.RunCmd(["vgs", "-ovg_size,vg_free,pv_count", "--noheadings",
767 "--nosuffix", "--units=m", "--separator=:", vg_name])
770 logging.error("volume group %s not present", vg_name)
772 valarr = retval.stdout.strip().rstrip(':').split(':')
776 "vg_size": int(round(float(valarr[0]), 0)),
777 "vg_free": int(round(float(valarr[1]), 0)),
778 "pv_count": int(valarr[2]),
780 except ValueError, err:
781 logging.exception("Fail to parse vgs output")
783 logging.error("vgs output has the wrong number of fields (expected"
784 " three): %s", str(valarr))
788 def _GetBlockDevSymlinkPath(instance_name, idx):
789 return os.path.join(constants.DISK_LINKS_DIR,
790 "%s:%d" % (instance_name, idx))
793 def _SymlinkBlockDev(instance_name, device_path, idx):
794 """Set up symlinks to a instance's block device.
796 This is an auxiliary function run when an instance is start (on the primary
797 node) or when an instance is migrated (on the target node).
800 @param instance_name: the name of the target instance
801 @param device_path: path of the physical block device, on the node
802 @param idx: the disk index
803 @return: absolute path to the disk's symlink
806 link_name = _GetBlockDevSymlinkPath(instance_name, idx)
808 os.symlink(device_path, link_name)
810 if err.errno == errno.EEXIST:
811 if (not os.path.islink(link_name) or
812 os.readlink(link_name) != device_path):
814 os.symlink(device_path, link_name)
821 def _RemoveBlockDevLinks(instance_name, disks):
822 """Remove the block device symlinks belonging to the given instance.
825 for idx, disk in enumerate(disks):
826 link_name = _GetBlockDevSymlinkPath(instance_name, idx)
827 if os.path.islink(link_name):
831 logging.exception("Can't remove symlink '%s'", link_name)
834 def _GatherAndLinkBlockDevs(instance):
835 """Set up an instance's block device(s).
837 This is run on the primary node at instance startup. The block
838 devices must be already assembled.
840 @type instance: L{objects.Instance}
841 @param instance: the instance whose disks we shoul assemble
843 @return: list of (disk_object, device_path)
847 for idx, disk in enumerate(instance.disks):
848 device = _RecursiveFindBD(disk)
850 raise errors.BlockDeviceError("Block device '%s' is not set up." %
854 link_name = _SymlinkBlockDev(instance.name, device.dev_path, idx)
856 raise errors.BlockDeviceError("Cannot create block device symlink: %s" %
859 block_devices.append((disk, link_name))
864 def StartInstance(instance):
865 """Start an instance.
867 @type instance: L{objects.Instance}
868 @param instance: the instance object
870 @return: whether the startup was successful or not
873 running_instances = GetInstanceList([instance.hypervisor])
875 if instance.name in running_instances:
876 return (True, "Already running")
879 block_devices = _GatherAndLinkBlockDevs(instance)
880 hyper = hypervisor.GetHypervisor(instance.hypervisor)
881 hyper.StartInstance(instance, block_devices)
882 except errors.BlockDeviceError, err:
883 logging.exception("Failed to start instance")
884 return (False, "Block device error: %s" % str(err))
885 except errors.HypervisorError, err:
886 logging.exception("Failed to start instance")
887 _RemoveBlockDevLinks(instance.name, instance.disks)
888 return (False, "Hypervisor error: %s" % str(err))
890 return (True, "Instance started successfully")
893 def InstanceShutdown(instance):
894 """Shut an instance down.
896 @note: this functions uses polling with a hardcoded timeout.
898 @type instance: L{objects.Instance}
899 @param instance: the instance object
901 @return: whether the startup was successful or not
904 hv_name = instance.hypervisor
905 running_instances = GetInstanceList([hv_name])
907 if instance.name not in running_instances:
908 return (True, "Instance already stopped")
910 hyper = hypervisor.GetHypervisor(hv_name)
912 hyper.StopInstance(instance)
913 except errors.HypervisorError, err:
914 msg = "Failed to stop instance %s: %s" % (instance.name, err)
918 # test every 10secs for 2min
921 for dummy in range(11):
922 if instance.name not in GetInstanceList([hv_name]):
926 # the shutdown did not succeed
927 logging.error("Shutdown of '%s' unsuccessful, using destroy",
931 hyper.StopInstance(instance, force=True)
932 except errors.HypervisorError, err:
933 msg = "Failed to force stop instance %s: %s" % (instance.name, err)
938 if instance.name in GetInstanceList([hv_name]):
939 msg = ("Could not shutdown instance %s even by destroy" %
944 _RemoveBlockDevLinks(instance.name, instance.disks)
946 return (True, "Instance has been shutdown successfully")
949 def InstanceReboot(instance, reboot_type):
950 """Reboot an instance.
952 @type instance: L{objects.Instance}
953 @param instance: the instance object to reboot
954 @type reboot_type: str
955 @param reboot_type: the type of reboot, one the following
957 - L{constants.INSTANCE_REBOOT_SOFT}: only reboot the
958 instance OS, do not recreate the VM
959 - L{constants.INSTANCE_REBOOT_HARD}: tear down and
960 restart the VM (at the hypervisor level)
961 - the other reboot type (L{constants.INSTANCE_REBOOT_HARD})
962 is not accepted here, since that mode is handled
965 @return: the success of the operation
968 running_instances = GetInstanceList([instance.hypervisor])
970 if instance.name not in running_instances:
971 msg = "Cannot reboot instance %s that is not running" % instance.name
975 hyper = hypervisor.GetHypervisor(instance.hypervisor)
976 if reboot_type == constants.INSTANCE_REBOOT_SOFT:
978 hyper.RebootInstance(instance)
979 except errors.HypervisorError, err:
980 msg = "Failed to soft reboot instance %s: %s" % (instance.name, err)
983 elif reboot_type == constants.INSTANCE_REBOOT_HARD:
985 stop_result = InstanceShutdown(instance)
986 if not stop_result[0]:
988 return StartInstance(instance)
989 except errors.HypervisorError, err:
990 msg = "Failed to hard reboot instance %s: %s" % (instance.name, err)
994 return (False, "Invalid reboot_type received: %s" % (reboot_type,))
996 return (True, "Reboot successful")
999 def MigrationInfo(instance):
1000 """Gather information about an instance to be migrated.
1002 @type instance: L{objects.Instance}
1003 @param instance: the instance definition
1006 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1008 info = hyper.MigrationInfo(instance)
1009 except errors.HypervisorError, err:
1010 msg = "Failed to fetch migration information"
1011 logging.exception(msg)
1012 return (False, '%s: %s' % (msg, err))
1016 def AcceptInstance(instance, info, target):
1017 """Prepare the node to accept an instance.
1019 @type instance: L{objects.Instance}
1020 @param instance: the instance definition
1021 @type info: string/data (opaque)
1022 @param info: migration information, from the source node
1023 @type target: string
1024 @param target: target host (usually ip), on this node
1027 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1029 hyper.AcceptInstance(instance, info, target)
1030 except errors.HypervisorError, err:
1031 msg = "Failed to accept instance"
1032 logging.exception(msg)
1033 return (False, '%s: %s' % (msg, err))
1034 return (True, "Accept successfull")
1037 def FinalizeMigration(instance, info, success):
1038 """Finalize any preparation to accept an instance.
1040 @type instance: L{objects.Instance}
1041 @param instance: the instance definition
1042 @type info: string/data (opaque)
1043 @param info: migration information, from the source node
1044 @type success: boolean
1045 @param success: whether the migration was a success or a failure
1048 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1050 hyper.FinalizeMigration(instance, info, success)
1051 except errors.HypervisorError, err:
1052 msg = "Failed to finalize migration"
1053 logging.exception(msg)
1054 return (False, '%s: %s' % (msg, err))
1055 return (True, "Migration Finalized")
1058 def MigrateInstance(instance, target, live):
1059 """Migrates an instance to another node.
1061 @type instance: L{objects.Instance}
1062 @param instance: the instance definition
1063 @type target: string
1064 @param target: the target node name
1066 @param live: whether the migration should be done live or not (the
1067 interpretation of this parameter is left to the hypervisor)
1069 @return: a tuple of (success, msg) where:
1070 - succes is a boolean denoting the success/failure of the operation
1071 - msg is a string with details in case of failure
1074 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1077 hyper.MigrateInstance(instance.name, target, live)
1078 except errors.HypervisorError, err:
1079 msg = "Failed to migrate instance"
1080 logging.exception(msg)
1081 return (False, "%s: %s" % (msg, err))
1082 return (True, "Migration successfull")
1085 def BlockdevCreate(disk, size, owner, on_primary, info):
1086 """Creates a block device for an instance.
1088 @type disk: L{objects.Disk}
1089 @param disk: the object describing the disk we should create
1091 @param size: the size of the physical underlying device, in MiB
1093 @param owner: the name of the instance for which disk is created,
1094 used for device cache data
1095 @type on_primary: boolean
1096 @param on_primary: indicates if it is the primary node or not
1098 @param info: string that will be sent to the physical device
1099 creation, used for example to set (LVM) tags on LVs
1101 @return: the new unique_id of the device (this can sometime be
1102 computed only after creation), or None. On secondary nodes,
1103 it's not required to return anything.
1108 for child in disk.children:
1110 crdev = _RecursiveAssembleBD(child, owner, on_primary)
1111 except errors.BlockDeviceError, err:
1112 errmsg = "Can't assemble device %s: %s" % (child, err)
1113 logging.error(errmsg)
1114 return False, errmsg
1115 if on_primary or disk.AssembleOnSecondary():
1116 # we need the children open in case the device itself has to
1120 except errors.BlockDeviceError, err:
1121 errmsg = "Can't make child '%s' read-write: %s" % (child, err)
1122 logging.error(errmsg)
1123 return False, errmsg
1127 device = bdev.Create(disk.dev_type, disk.physical_id, clist, disk.size)
1128 except errors.BlockDeviceError, err:
1129 return False, "Can't create block device: %s" % str(err)
1131 if on_primary or disk.AssembleOnSecondary():
1134 except errors.BlockDeviceError, err:
1135 errmsg = ("Can't assemble device after creation, very"
1136 " unusual event: %s" % str(err))
1137 logging.error(errmsg)
1138 return False, errmsg
1139 device.SetSyncSpeed(constants.SYNC_SPEED)
1140 if on_primary or disk.OpenOnSecondary():
1142 device.Open(force=True)
1143 except errors.BlockDeviceError, err:
1144 errmsg = ("Can't make device r/w after creation, very"
1145 " unusual event: %s" % str(err))
1146 logging.error(errmsg)
1147 return False, errmsg
1148 DevCacheManager.UpdateCache(device.dev_path, owner,
1149 on_primary, disk.iv_name)
1151 device.SetInfo(info)
1153 physical_id = device.unique_id
1154 return True, physical_id
1157 def BlockdevRemove(disk):
1158 """Remove a block device.
1160 @note: This is intended to be called recursively.
1162 @type disk: L{objects.Disk}
1163 @param disk: the disk object we should remove
1165 @return: the success of the operation
1171 rdev = _RecursiveFindBD(disk)
1172 except errors.BlockDeviceError, err:
1173 # probably can't attach
1174 logging.info("Can't attach to device %s in remove", disk)
1176 if rdev is not None:
1177 r_path = rdev.dev_path
1180 except errors.BlockDeviceError, err:
1181 msgs.append(str(err))
1184 DevCacheManager.RemoveCache(r_path)
1187 for child in disk.children:
1188 c_status, c_msg = BlockdevRemove(child)
1189 result = result and c_status
1190 if c_msg: # not an empty message
1193 return (result, "; ".join(msgs))
1196 def _RecursiveAssembleBD(disk, owner, as_primary):
1197 """Activate a block device for an instance.
1199 This is run on the primary and secondary nodes for an instance.
1201 @note: this function is called recursively.
1203 @type disk: L{objects.Disk}
1204 @param disk: the disk we try to assemble
1206 @param owner: the name of the instance which owns the disk
1207 @type as_primary: boolean
1208 @param as_primary: if we should make the block device
1211 @return: the assembled device or None (in case no device
1213 @raise errors.BlockDeviceError: in case there is an error
1214 during the activation of the children or the device
1220 mcn = disk.ChildrenNeeded()
1222 mcn = 0 # max number of Nones allowed
1224 mcn = len(disk.children) - mcn # max number of Nones
1225 for chld_disk in disk.children:
1227 cdev = _RecursiveAssembleBD(chld_disk, owner, as_primary)
1228 except errors.BlockDeviceError, err:
1229 if children.count(None) >= mcn:
1232 logging.error("Error in child activation (but continuing): %s",
1234 children.append(cdev)
1236 if as_primary or disk.AssembleOnSecondary():
1237 r_dev = bdev.Assemble(disk.dev_type, disk.physical_id, children, disk.size)
1238 r_dev.SetSyncSpeed(constants.SYNC_SPEED)
1240 if as_primary or disk.OpenOnSecondary():
1242 DevCacheManager.UpdateCache(r_dev.dev_path, owner,
1243 as_primary, disk.iv_name)
1250 def BlockdevAssemble(disk, owner, as_primary):
1251 """Activate a block device for an instance.
1253 This is a wrapper over _RecursiveAssembleBD.
1255 @rtype: str or boolean
1256 @return: a C{/dev/...} path for primary nodes, and
1257 C{True} for secondary nodes
1261 result = "no error information"
1263 result = _RecursiveAssembleBD(disk, owner, as_primary)
1264 if isinstance(result, bdev.BlockDev):
1265 result = result.dev_path
1266 except errors.BlockDeviceError, err:
1267 result = "Error while assembling disk: %s" % str(err)
1269 return (status, result)
1272 def BlockdevShutdown(disk):
1273 """Shut down a block device.
1275 First, if the device is assembled (Attach() is successfull), then
1276 the device is shutdown. Then the children of the device are
1279 This function is called recursively. Note that we don't cache the
1280 children or such, as oppossed to assemble, shutdown of different
1281 devices doesn't require that the upper device was active.
1283 @type disk: L{objects.Disk}
1284 @param disk: the description of the disk we should
1287 @return: the success of the operation
1292 r_dev = _RecursiveFindBD(disk)
1293 if r_dev is not None:
1294 r_path = r_dev.dev_path
1297 DevCacheManager.RemoveCache(r_path)
1298 except errors.BlockDeviceError, err:
1299 msgs.append(str(err))
1303 for child in disk.children:
1304 c_status, c_msg = BlockdevShutdown(child)
1305 result = result and c_status
1306 if c_msg: # not an empty message
1309 return (result, "; ".join(msgs))
1312 def BlockdevAddchildren(parent_cdev, new_cdevs):
1313 """Extend a mirrored block device.
1315 @type parent_cdev: L{objects.Disk}
1316 @param parent_cdev: the disk to which we should add children
1317 @type new_cdevs: list of L{objects.Disk}
1318 @param new_cdevs: the list of children which we should add
1320 @return: the success of the operation
1323 parent_bdev = _RecursiveFindBD(parent_cdev)
1324 if parent_bdev is None:
1325 logging.error("Can't find parent device")
1327 new_bdevs = [_RecursiveFindBD(disk) for disk in new_cdevs]
1328 if new_bdevs.count(None) > 0:
1329 logging.error("Can't find new device(s) to add: %s:%s",
1330 new_bdevs, new_cdevs)
1332 parent_bdev.AddChildren(new_bdevs)
1336 def BlockdevRemovechildren(parent_cdev, new_cdevs):
1337 """Shrink a mirrored block device.
1339 @type parent_cdev: L{objects.Disk}
1340 @param parent_cdev: the disk from which we should remove children
1341 @type new_cdevs: list of L{objects.Disk}
1342 @param new_cdevs: the list of children which we should remove
1344 @return: the success of the operation
1347 parent_bdev = _RecursiveFindBD(parent_cdev)
1348 if parent_bdev is None:
1349 logging.error("Can't find parent in remove children: %s", parent_cdev)
1352 for disk in new_cdevs:
1353 rpath = disk.StaticDevPath()
1355 bd = _RecursiveFindBD(disk)
1357 logging.error("Can't find dynamic device %s while removing children",
1361 devs.append(bd.dev_path)
1364 parent_bdev.RemoveChildren(devs)
1368 def BlockdevGetmirrorstatus(disks):
1369 """Get the mirroring status of a list of devices.
1371 @type disks: list of L{objects.Disk}
1372 @param disks: the list of disks which we should query
1375 a list of (mirror_done, estimated_time) tuples, which
1376 are the result of L{bdev.BlockDev.CombinedSyncStatus}
1377 @raise errors.BlockDeviceError: if any of the disks cannot be
1383 rbd = _RecursiveFindBD(dsk)
1385 raise errors.BlockDeviceError("Can't find device %s" % str(dsk))
1386 stats.append(rbd.CombinedSyncStatus())
1390 def _RecursiveFindBD(disk):
1391 """Check if a device is activated.
1393 If so, return informations about the real device.
1395 @type disk: L{objects.Disk}
1396 @param disk: the disk object we need to find
1398 @return: None if the device can't be found,
1399 otherwise the device instance
1404 for chdisk in disk.children:
1405 children.append(_RecursiveFindBD(chdisk))
1407 return bdev.FindDevice(disk.dev_type, disk.physical_id, children, disk.size)
1410 def BlockdevFind(disk):
1411 """Check if a device is activated.
1413 If it is, return informations about the real device.
1415 @type disk: L{objects.Disk}
1416 @param disk: the disk to find
1417 @rtype: None or tuple
1418 @return: None if the disk cannot be found, otherwise a
1419 tuple (device_path, major, minor, sync_percent,
1420 estimated_time, is_degraded)
1424 rbd = _RecursiveFindBD(disk)
1425 except errors.BlockDeviceError, err:
1426 return (False, str(err))
1429 return (True, (rbd.dev_path, rbd.major, rbd.minor) + rbd.GetSyncStatus())
1432 def UploadFile(file_name, data, mode, uid, gid, atime, mtime):
1433 """Write a file to the filesystem.
1435 This allows the master to overwrite(!) a file. It will only perform
1436 the operation if the file belongs to a list of configuration files.
1438 @type file_name: str
1439 @param file_name: the target file name
1441 @param data: the new contents of the file
1443 @param mode: the mode to give the file (can be None)
1445 @param uid: the owner of the file (can be -1 for default)
1447 @param gid: the group of the file (can be -1 for default)
1449 @param atime: the atime to set on the file (can be None)
1451 @param mtime: the mtime to set on the file (can be None)
1453 @return: the success of the operation; errors are logged
1454 in the node daemon log
1457 if not os.path.isabs(file_name):
1458 logging.error("Filename passed to UploadFile is not absolute: '%s'",
1463 constants.CLUSTER_CONF_FILE,
1464 constants.ETC_HOSTS,
1465 constants.SSH_KNOWN_HOSTS_FILE,
1466 constants.VNC_PASSWORD_FILE,
1469 if file_name not in allowed_files:
1470 logging.error("Filename passed to UploadFile not in allowed"
1471 " upload targets: '%s'", file_name)
1474 raw_data = _Decompress(data)
1476 utils.WriteFile(file_name, data=raw_data, mode=mode, uid=uid, gid=gid,
1477 atime=atime, mtime=mtime)
1481 def WriteSsconfFiles(values):
1482 """Update all ssconf files.
1484 Wrapper around the SimpleStore.WriteFiles.
1487 ssconf.SimpleStore().WriteFiles(values)
1490 def _ErrnoOrStr(err):
1491 """Format an EnvironmentError exception.
1493 If the L{err} argument has an errno attribute, it will be looked up
1494 and converted into a textual C{E...} description. Otherwise the
1495 string representation of the error will be returned.
1497 @type err: L{EnvironmentError}
1498 @param err: the exception to format
1501 if hasattr(err, 'errno'):
1502 detail = errno.errorcode[err.errno]
1508 def _OSOndiskVersion(name, os_dir):
1509 """Compute and return the API version of a given OS.
1511 This function will try to read the API version of the OS given by
1512 the 'name' parameter and residing in the 'os_dir' directory.
1515 @param name: the OS name we should look for
1517 @param os_dir: the directory inwhich we should look for the OS
1520 Either an integer denoting the version or None in the
1521 case when this is not a valid OS name.
1522 @raise errors.InvalidOS: if the OS cannot be found
1525 api_file = os.path.sep.join([os_dir, "ganeti_api_version"])
1528 st = os.stat(api_file)
1529 except EnvironmentError, err:
1530 raise errors.InvalidOS(name, os_dir, "'ganeti_api_version' file not"
1531 " found (%s)" % _ErrnoOrStr(err))
1533 if not stat.S_ISREG(stat.S_IFMT(st.st_mode)):
1534 raise errors.InvalidOS(name, os_dir, "'ganeti_api_version' file is not"
1540 api_versions = f.readlines()
1543 except EnvironmentError, err:
1544 raise errors.InvalidOS(name, os_dir, "error while reading the"
1545 " API version (%s)" % _ErrnoOrStr(err))
1547 api_versions = [version.strip() for version in api_versions]
1549 api_versions = [int(version) for version in api_versions]
1550 except (TypeError, ValueError), err:
1551 raise errors.InvalidOS(name, os_dir,
1552 "API version is not integer (%s)" % str(err))
1557 def DiagnoseOS(top_dirs=None):
1558 """Compute the validity for all OSes.
1560 @type top_dirs: list
1561 @param top_dirs: the list of directories in which to
1562 search (if not given defaults to
1563 L{constants.OS_SEARCH_PATH})
1564 @rtype: list of L{objects.OS}
1565 @return: an OS object for each name in all the given
1569 if top_dirs is None:
1570 top_dirs = constants.OS_SEARCH_PATH
1573 for dir_name in top_dirs:
1574 if os.path.isdir(dir_name):
1576 f_names = utils.ListVisibleFiles(dir_name)
1577 except EnvironmentError, err:
1578 logging.exception("Can't list the OS directory %s", dir_name)
1580 for name in f_names:
1582 os_inst = OSFromDisk(name, base_dir=dir_name)
1583 result.append(os_inst)
1584 except errors.InvalidOS, err:
1585 result.append(objects.OS.FromInvalidOS(err))
1590 def OSFromDisk(name, base_dir=None):
1591 """Create an OS instance from disk.
1593 This function will return an OS instance if the given name is a
1594 valid OS name. Otherwise, it will raise an appropriate
1595 L{errors.InvalidOS} exception, detailing why this is not a valid OS.
1597 @type base_dir: string
1598 @keyword base_dir: Base directory containing OS installations.
1599 Defaults to a search in all the OS_SEARCH_PATH dirs.
1600 @rtype: L{objects.OS}
1601 @return: the OS instance if we find a valid one
1602 @raise errors.InvalidOS: if we don't find a valid OS
1605 if base_dir is None:
1606 os_dir = utils.FindFile(name, constants.OS_SEARCH_PATH, os.path.isdir)
1608 raise errors.InvalidOS(name, None, "OS dir not found in search path")
1610 os_dir = os.path.sep.join([base_dir, name])
1612 api_versions = _OSOndiskVersion(name, os_dir)
1614 if constants.OS_API_VERSION not in api_versions:
1615 raise errors.InvalidOS(name, os_dir, "API version mismatch"
1616 " (found %s want %s)"
1617 % (api_versions, constants.OS_API_VERSION))
1619 # OS Scripts dictionary, we will populate it with the actual script names
1620 os_scripts = dict.fromkeys(constants.OS_SCRIPTS)
1622 for script in os_scripts:
1623 os_scripts[script] = os.path.sep.join([os_dir, script])
1626 st = os.stat(os_scripts[script])
1627 except EnvironmentError, err:
1628 raise errors.InvalidOS(name, os_dir, "'%s' script missing (%s)" %
1629 (script, _ErrnoOrStr(err)))
1631 if stat.S_IMODE(st.st_mode) & stat.S_IXUSR != stat.S_IXUSR:
1632 raise errors.InvalidOS(name, os_dir, "'%s' script not executable" %
1635 if not stat.S_ISREG(stat.S_IFMT(st.st_mode)):
1636 raise errors.InvalidOS(name, os_dir, "'%s' is not a regular file" %
1640 return objects.OS(name=name, path=os_dir, status=constants.OS_VALID_STATUS,
1641 create_script=os_scripts[constants.OS_SCRIPT_CREATE],
1642 export_script=os_scripts[constants.OS_SCRIPT_EXPORT],
1643 import_script=os_scripts[constants.OS_SCRIPT_IMPORT],
1644 rename_script=os_scripts[constants.OS_SCRIPT_RENAME],
1645 api_versions=api_versions)
1647 def OSEnvironment(instance, debug=0):
1648 """Calculate the environment for an os script.
1650 @type instance: L{objects.Instance}
1651 @param instance: target instance for the os script run
1652 @type debug: integer
1653 @param debug: debug level (0 or 1, for OS Api 10)
1655 @return: dict of environment variables
1656 @raise errors.BlockDeviceError: if the block device
1661 result['OS_API_VERSION'] = '%d' % constants.OS_API_VERSION
1662 result['INSTANCE_NAME'] = instance.name
1663 result['INSTANCE_OS'] = instance.os
1664 result['HYPERVISOR'] = instance.hypervisor
1665 result['DISK_COUNT'] = '%d' % len(instance.disks)
1666 result['NIC_COUNT'] = '%d' % len(instance.nics)
1667 result['DEBUG_LEVEL'] = '%d' % debug
1668 for idx, disk in enumerate(instance.disks):
1669 real_disk = _RecursiveFindBD(disk)
1670 if real_disk is None:
1671 raise errors.BlockDeviceError("Block device '%s' is not set up" %
1674 result['DISK_%d_PATH' % idx] = real_disk.dev_path
1675 result['DISK_%d_ACCESS' % idx] = disk.mode
1676 if constants.HV_DISK_TYPE in instance.hvparams:
1677 result['DISK_%d_FRONTEND_TYPE' % idx] = \
1678 instance.hvparams[constants.HV_DISK_TYPE]
1679 if disk.dev_type in constants.LDS_BLOCK:
1680 result['DISK_%d_BACKEND_TYPE' % idx] = 'block'
1681 elif disk.dev_type == constants.LD_FILE:
1682 result['DISK_%d_BACKEND_TYPE' % idx] = \
1683 'file:%s' % disk.physical_id[0]
1684 for idx, nic in enumerate(instance.nics):
1685 result['NIC_%d_MAC' % idx] = nic.mac
1687 result['NIC_%d_IP' % idx] = nic.ip
1688 result['NIC_%d_BRIDGE' % idx] = nic.bridge
1689 if constants.HV_NIC_TYPE in instance.hvparams:
1690 result['NIC_%d_FRONTEND_TYPE' % idx] = \
1691 instance.hvparams[constants.HV_NIC_TYPE]
1693 for source, kind in [(instance.beparams, "BE"), (instance.hvparams, "HV")]:
1694 for key, value in source.items():
1695 result["INSTANCE_%s_%s" % (kind, key)] = str(value)
1699 def BlockdevGrow(disk, amount):
1700 """Grow a stack of block devices.
1702 This function is called recursively, with the childrens being the
1703 first ones to resize.
1705 @type disk: L{objects.Disk}
1706 @param disk: the disk to be grown
1707 @rtype: (status, result)
1708 @return: a tuple with the status of the operation
1709 (True/False), and the errors message if status
1713 r_dev = _RecursiveFindBD(disk)
1715 return False, "Cannot find block device %s" % (disk,)
1719 except errors.BlockDeviceError, err:
1720 return False, str(err)
1725 def BlockdevSnapshot(disk):
1726 """Create a snapshot copy of a block device.
1728 This function is called recursively, and the snapshot is actually created
1729 just for the leaf lvm backend device.
1731 @type disk: L{objects.Disk}
1732 @param disk: the disk to be snapshotted
1734 @return: snapshot disk path
1738 if len(disk.children) == 1:
1739 # only one child, let's recurse on it
1740 return BlockdevSnapshot(disk.children[0])
1742 # more than one child, choose one that matches
1743 for child in disk.children:
1744 if child.size == disk.size:
1745 # return implies breaking the loop
1746 return BlockdevSnapshot(child)
1747 elif disk.dev_type == constants.LD_LV:
1748 r_dev = _RecursiveFindBD(disk)
1749 if r_dev is not None:
1750 # let's stay on the safe side and ask for the full size, for now
1751 return r_dev.Snapshot(disk.size)
1755 raise errors.ProgrammerError("Cannot snapshot non-lvm block device"
1756 " '%s' of type '%s'" %
1757 (disk.unique_id, disk.dev_type))
1760 def ExportSnapshot(disk, dest_node, instance, cluster_name, idx):
1761 """Export a block device snapshot to a remote node.
1763 @type disk: L{objects.Disk}
1764 @param disk: the description of the disk to export
1765 @type dest_node: str
1766 @param dest_node: the destination node to export to
1767 @type instance: L{objects.Instance}
1768 @param instance: the instance object to whom the disk belongs
1769 @type cluster_name: str
1770 @param cluster_name: the cluster name, needed for SSH hostalias
1772 @param idx: the index of the disk in the instance's disk list,
1773 used to export to the OS scripts environment
1775 @return: the success of the operation
1778 export_env = OSEnvironment(instance)
1780 inst_os = OSFromDisk(instance.os)
1781 export_script = inst_os.export_script
1783 logfile = "%s/exp-%s-%s-%s.log" % (constants.LOG_OS_DIR, inst_os.name,
1784 instance.name, int(time.time()))
1785 if not os.path.exists(constants.LOG_OS_DIR):
1786 os.mkdir(constants.LOG_OS_DIR, 0750)
1787 real_disk = _RecursiveFindBD(disk)
1788 if real_disk is None:
1789 raise errors.BlockDeviceError("Block device '%s' is not set up" %
1793 export_env['EXPORT_DEVICE'] = real_disk.dev_path
1794 export_env['EXPORT_INDEX'] = str(idx)
1796 destdir = os.path.join(constants.EXPORT_DIR, instance.name + ".new")
1797 destfile = disk.physical_id[1]
1799 # the target command is built out of three individual commands,
1800 # which are joined by pipes; we check each individual command for
1802 expcmd = utils.BuildShellCmd("cd %s; %s 2>%s", inst_os.path,
1803 export_script, logfile)
1807 destcmd = utils.BuildShellCmd("mkdir -p %s && cat > %s/%s",
1808 destdir, destdir, destfile)
1809 remotecmd = _GetSshRunner(cluster_name).BuildCmd(dest_node,
1810 constants.GANETI_RUNAS,
1813 # all commands have been checked, so we're safe to combine them
1814 command = '|'.join([expcmd, comprcmd, utils.ShellQuoteArgs(remotecmd)])
1816 result = utils.RunCmd(command, env=export_env)
1819 logging.error("os snapshot export command '%s' returned error: %s"
1820 " output: %s", command, result.fail_reason, result.output)
1826 def FinalizeExport(instance, snap_disks):
1827 """Write out the export configuration information.
1829 @type instance: L{objects.Instance}
1830 @param instance: the instance which we export, used for
1831 saving configuration
1832 @type snap_disks: list of L{objects.Disk}
1833 @param snap_disks: list of snapshot block devices, which
1834 will be used to get the actual name of the dump file
1837 @return: the success of the operation
1840 destdir = os.path.join(constants.EXPORT_DIR, instance.name + ".new")
1841 finaldestdir = os.path.join(constants.EXPORT_DIR, instance.name)
1843 config = objects.SerializableConfigParser()
1845 config.add_section(constants.INISECT_EXP)
1846 config.set(constants.INISECT_EXP, 'version', '0')
1847 config.set(constants.INISECT_EXP, 'timestamp', '%d' % int(time.time()))
1848 config.set(constants.INISECT_EXP, 'source', instance.primary_node)
1849 config.set(constants.INISECT_EXP, 'os', instance.os)
1850 config.set(constants.INISECT_EXP, 'compression', 'gzip')
1852 config.add_section(constants.INISECT_INS)
1853 config.set(constants.INISECT_INS, 'name', instance.name)
1854 config.set(constants.INISECT_INS, 'memory', '%d' %
1855 instance.beparams[constants.BE_MEMORY])
1856 config.set(constants.INISECT_INS, 'vcpus', '%d' %
1857 instance.beparams[constants.BE_VCPUS])
1858 config.set(constants.INISECT_INS, 'disk_template', instance.disk_template)
1861 for nic_count, nic in enumerate(instance.nics):
1863 config.set(constants.INISECT_INS, 'nic%d_mac' %
1864 nic_count, '%s' % nic.mac)
1865 config.set(constants.INISECT_INS, 'nic%d_ip' % nic_count, '%s' % nic.ip)
1866 config.set(constants.INISECT_INS, 'nic%d_bridge' % nic_count,
1868 # TODO: redundant: on load can read nics until it doesn't exist
1869 config.set(constants.INISECT_INS, 'nic_count' , '%d' % nic_total)
1872 for disk_count, disk in enumerate(snap_disks):
1875 config.set(constants.INISECT_INS, 'disk%d_ivname' % disk_count,
1876 ('%s' % disk.iv_name))
1877 config.set(constants.INISECT_INS, 'disk%d_dump' % disk_count,
1878 ('%s' % disk.physical_id[1]))
1879 config.set(constants.INISECT_INS, 'disk%d_size' % disk_count,
1882 config.set(constants.INISECT_INS, 'disk_count' , '%d' % disk_total)
1884 utils.WriteFile(os.path.join(destdir, constants.EXPORT_CONF_FILE),
1885 data=config.Dumps())
1886 shutil.rmtree(finaldestdir, True)
1887 shutil.move(destdir, finaldestdir)
1892 def ExportInfo(dest):
1893 """Get export configuration information.
1896 @param dest: directory containing the export
1898 @rtype: L{objects.SerializableConfigParser}
1899 @return: a serializable config file containing the
1903 cff = os.path.join(dest, constants.EXPORT_CONF_FILE)
1905 config = objects.SerializableConfigParser()
1908 if (not config.has_section(constants.INISECT_EXP) or
1909 not config.has_section(constants.INISECT_INS)):
1915 def ImportOSIntoInstance(instance, src_node, src_images, cluster_name):
1916 """Import an os image into an instance.
1918 @type instance: L{objects.Instance}
1919 @param instance: instance to import the disks into
1920 @type src_node: string
1921 @param src_node: source node for the disk images
1922 @type src_images: list of string
1923 @param src_images: absolute paths of the disk images
1924 @rtype: list of boolean
1925 @return: each boolean represent the success of importing the n-th disk
1928 import_env = OSEnvironment(instance)
1929 inst_os = OSFromDisk(instance.os)
1930 import_script = inst_os.import_script
1932 logfile = "%s/import-%s-%s-%s.log" % (constants.LOG_OS_DIR, instance.os,
1933 instance.name, int(time.time()))
1934 if not os.path.exists(constants.LOG_OS_DIR):
1935 os.mkdir(constants.LOG_OS_DIR, 0750)
1938 impcmd = utils.BuildShellCmd("(cd %s; %s >%s 2>&1)", inst_os.path,
1939 import_script, logfile)
1942 for idx, image in enumerate(src_images):
1944 destcmd = utils.BuildShellCmd('cat %s', image)
1945 remotecmd = _GetSshRunner(cluster_name).BuildCmd(src_node,
1946 constants.GANETI_RUNAS,
1948 command = '|'.join([utils.ShellQuoteArgs(remotecmd), comprcmd, impcmd])
1949 import_env['IMPORT_DEVICE'] = import_env['DISK_%d_PATH' % idx]
1950 import_env['IMPORT_INDEX'] = str(idx)
1951 result = utils.RunCmd(command, env=import_env)
1953 logging.error("Disk import command '%s' returned error: %s"
1954 " output: %s", command, result.fail_reason,
1956 final_result.append(False)
1958 final_result.append(True)
1960 final_result.append(True)
1966 """Return a list of exports currently available on this machine.
1969 @return: list of the exports
1972 if os.path.isdir(constants.EXPORT_DIR):
1973 return utils.ListVisibleFiles(constants.EXPORT_DIR)
1978 def RemoveExport(export):
1979 """Remove an existing export from the node.
1982 @param export: the name of the export to remove
1984 @return: the success of the operation
1987 target = os.path.join(constants.EXPORT_DIR, export)
1989 shutil.rmtree(target)
1990 # TODO: catch some of the relevant exceptions and provide a pretty
1991 # error message if rmtree fails.
1996 def BlockdevRename(devlist):
1997 """Rename a list of block devices.
1999 @type devlist: list of tuples
2000 @param devlist: list of tuples of the form (disk,
2001 new_logical_id, new_physical_id); disk is an
2002 L{objects.Disk} object describing the current disk,
2003 and new logical_id/physical_id is the name we
2006 @return: True if all renames succeeded, False otherwise
2010 for disk, unique_id in devlist:
2011 dev = _RecursiveFindBD(disk)
2016 old_rpath = dev.dev_path
2017 dev.Rename(unique_id)
2018 new_rpath = dev.dev_path
2019 if old_rpath != new_rpath:
2020 DevCacheManager.RemoveCache(old_rpath)
2021 # FIXME: we should add the new cache information here, like:
2022 # DevCacheManager.UpdateCache(new_rpath, owner, ...)
2023 # but we don't have the owner here - maybe parse from existing
2024 # cache? for now, we only lose lvm data when we rename, which
2025 # is less critical than DRBD or MD
2026 except errors.BlockDeviceError, err:
2027 logging.exception("Can't rename device '%s' to '%s'", dev, unique_id)
2032 def _TransformFileStorageDir(file_storage_dir):
2033 """Checks whether given file_storage_dir is valid.
2035 Checks wheter the given file_storage_dir is within the cluster-wide
2036 default file_storage_dir stored in SimpleStore. Only paths under that
2037 directory are allowed.
2039 @type file_storage_dir: str
2040 @param file_storage_dir: the path to check
2042 @return: the normalized path if valid, None otherwise
2046 file_storage_dir = os.path.normpath(file_storage_dir)
2047 base_file_storage_dir = cfg.GetFileStorageDir()
2048 if (not os.path.commonprefix([file_storage_dir, base_file_storage_dir]) ==
2049 base_file_storage_dir):
2050 logging.error("file storage directory '%s' is not under base file"
2051 " storage directory '%s'",
2052 file_storage_dir, base_file_storage_dir)
2054 return file_storage_dir
2057 def CreateFileStorageDir(file_storage_dir):
2058 """Create file storage directory.
2060 @type file_storage_dir: str
2061 @param file_storage_dir: directory to create
2064 @return: tuple with first element a boolean indicating wheter dir
2065 creation was successful or not
2068 file_storage_dir = _TransformFileStorageDir(file_storage_dir)
2070 if not file_storage_dir:
2073 if os.path.exists(file_storage_dir):
2074 if not os.path.isdir(file_storage_dir):
2075 logging.error("'%s' is not a directory", file_storage_dir)
2079 os.makedirs(file_storage_dir, 0750)
2080 except OSError, err:
2081 logging.error("Cannot create file storage directory '%s': %s",
2082 file_storage_dir, err)
2087 def RemoveFileStorageDir(file_storage_dir):
2088 """Remove file storage directory.
2090 Remove it only if it's empty. If not log an error and return.
2092 @type file_storage_dir: str
2093 @param file_storage_dir: the directory we should cleanup
2094 @rtype: tuple (success,)
2095 @return: tuple of one element, C{success}, denoting
2096 whether the operation was successfull
2099 file_storage_dir = _TransformFileStorageDir(file_storage_dir)
2101 if not file_storage_dir:
2104 if os.path.exists(file_storage_dir):
2105 if not os.path.isdir(file_storage_dir):
2106 logging.error("'%s' is not a directory", file_storage_dir)
2108 # deletes dir only if empty, otherwise we want to return False
2110 os.rmdir(file_storage_dir)
2111 except OSError, err:
2112 logging.exception("Cannot remove file storage directory '%s'",
2118 def RenameFileStorageDir(old_file_storage_dir, new_file_storage_dir):
2119 """Rename the file storage directory.
2121 @type old_file_storage_dir: str
2122 @param old_file_storage_dir: the current path
2123 @type new_file_storage_dir: str
2124 @param new_file_storage_dir: the name we should rename to
2125 @rtype: tuple (success,)
2126 @return: tuple of one element, C{success}, denoting
2127 whether the operation was successful
2130 old_file_storage_dir = _TransformFileStorageDir(old_file_storage_dir)
2131 new_file_storage_dir = _TransformFileStorageDir(new_file_storage_dir)
2133 if not old_file_storage_dir or not new_file_storage_dir:
2136 if not os.path.exists(new_file_storage_dir):
2137 if os.path.isdir(old_file_storage_dir):
2139 os.rename(old_file_storage_dir, new_file_storage_dir)
2140 except OSError, err:
2141 logging.exception("Cannot rename '%s' to '%s'",
2142 old_file_storage_dir, new_file_storage_dir)
2145 logging.error("'%s' is not a directory", old_file_storage_dir)
2148 if os.path.exists(old_file_storage_dir):
2149 logging.error("Cannot rename '%s' to '%s'. Both locations exist.",
2150 old_file_storage_dir, new_file_storage_dir)
2155 def _IsJobQueueFile(file_name):
2156 """Checks whether the given filename is in the queue directory.
2158 @type file_name: str
2159 @param file_name: the file name we should check
2161 @return: whether the file is under the queue directory
2164 queue_dir = os.path.normpath(constants.QUEUE_DIR)
2165 result = (os.path.commonprefix([queue_dir, file_name]) == queue_dir)
2168 logging.error("'%s' is not a file in the queue directory",
2174 def JobQueueUpdate(file_name, content):
2175 """Updates a file in the queue directory.
2177 This is just a wrapper over L{utils.WriteFile}, with proper
2180 @type file_name: str
2181 @param file_name: the job file name
2183 @param content: the new job contents
2185 @return: the success of the operation
2188 if not _IsJobQueueFile(file_name):
2191 # Write and replace the file atomically
2192 utils.WriteFile(file_name, data=_Decompress(content))
2197 def JobQueueRename(old, new):
2198 """Renames a job queue file.
2200 This is just a wrapper over os.rename with proper checking.
2203 @param old: the old (actual) file name
2205 @param new: the desired file name
2207 @return: the success of the operation
2210 if not (_IsJobQueueFile(old) and _IsJobQueueFile(new)):
2213 utils.RenameFile(old, new, mkdir=True)
2218 def JobQueueSetDrainFlag(drain_flag):
2219 """Set the drain flag for the queue.
2221 This will set or unset the queue drain flag.
2223 @type drain_flag: boolean
2224 @param drain_flag: if True, will set the drain flag, otherwise reset it.
2226 @return: always True
2227 @warning: the function always returns True
2231 utils.WriteFile(constants.JOB_QUEUE_DRAIN_FILE, data="", close=True)
2233 utils.RemoveFile(constants.JOB_QUEUE_DRAIN_FILE)
2238 def BlockdevClose(instance_name, disks):
2239 """Closes the given block devices.
2241 This means they will be switched to secondary mode (in case of
2244 @param instance_name: if the argument is not empty, the symlinks
2245 of this instance will be removed
2246 @type disks: list of L{objects.Disk}
2247 @param disks: the list of disks to be closed
2248 @rtype: tuple (success, message)
2249 @return: a tuple of success and message, where success
2250 indicates the succes of the operation, and message
2251 which will contain the error details in case we
2257 rd = _RecursiveFindBD(cf)
2259 return (False, "Can't find device %s" % cf)
2266 except errors.BlockDeviceError, err:
2267 msg.append(str(err))
2269 return (False, "Can't make devices secondary: %s" % ",".join(msg))
2272 _RemoveBlockDevLinks(instance_name, disks)
2273 return (True, "All devices secondary")
2276 def ValidateHVParams(hvname, hvparams):
2277 """Validates the given hypervisor parameters.
2279 @type hvname: string
2280 @param hvname: the hypervisor name
2281 @type hvparams: dict
2282 @param hvparams: the hypervisor parameters to be validated
2283 @rtype: tuple (success, message)
2284 @return: a tuple of success and message, where success
2285 indicates the succes of the operation, and message
2286 which will contain the error details in case we
2291 hv_type = hypervisor.GetHypervisor(hvname)
2292 hv_type.ValidateParameters(hvparams)
2293 return (True, "Validation passed")
2294 except errors.HypervisorError, err:
2295 return (False, str(err))
2299 """Demotes the current node from master candidate role.
2302 # try to ensure we're not the master by mistake
2303 master, myself = ssconf.GetMasterAndMyself()
2304 if master == myself:
2305 return (False, "ssconf status shows I'm the master node, will not demote")
2306 pid_file = utils.DaemonPidFileName(constants.MASTERD_PID)
2307 if utils.IsProcessAlive(utils.ReadPidFile(pid_file)):
2308 return (False, "The master daemon is running, will not demote")
2310 utils.CreateBackup(constants.CLUSTER_CONF_FILE)
2311 except EnvironmentError, err:
2312 if err.errno != errno.ENOENT:
2313 return (False, "Error while backing up cluster file: %s" % str(err))
2314 utils.RemoveFile(constants.CLUSTER_CONF_FILE)
2315 return (True, "Done")
2318 def _FindDisks(nodes_ip, disks):
2319 """Sets the physical ID on disks and returns the block devices.
2322 # set the correct physical ID
2323 my_name = utils.HostInfo().name
2325 cf.SetPhysicalID(my_name, nodes_ip)
2330 rd = _RecursiveFindBD(cf)
2332 return (False, "Can't find device %s" % cf)
2334 return (True, bdevs)
2337 def DrbdDisconnectNet(nodes_ip, disks):
2338 """Disconnects the network on a list of drbd devices.
2341 status, bdevs = _FindDisks(nodes_ip, disks)
2343 return status, bdevs
2349 except errors.BlockDeviceError, err:
2350 logging.exception("Failed to go into standalone mode")
2351 return (False, "Can't change network configuration: %s" % str(err))
2352 return (True, "All disks are now disconnected")
2355 def DrbdAttachNet(nodes_ip, disks, instance_name, multimaster):
2356 """Attaches the network on a list of drbd devices.
2359 status, bdevs = _FindDisks(nodes_ip, disks)
2361 return status, bdevs
2364 for idx, rd in enumerate(bdevs):
2366 _SymlinkBlockDev(instance_name, rd.dev_path, idx)
2367 except EnvironmentError, err:
2368 return (False, "Can't create symlink: %s" % str(err))
2369 # reconnect disks, switch to new master configuration and if
2370 # needed primary mode
2373 rd.AttachNet(multimaster)
2374 except errors.BlockDeviceError, err:
2375 return (False, "Can't change network configuration: %s" % str(err))
2376 # wait until the disks are connected; we need to retry the re-attach
2377 # if the device becomes standalone, as this might happen if the one
2378 # node disconnects and reconnects in a different mode before the
2379 # other node reconnects; in this case, one or both of the nodes will
2380 # decide it has wrong configuration and switch to standalone
2381 RECONNECT_TIMEOUT = 2 * 60
2382 sleep_time = 0.100 # start with 100 miliseconds
2383 timeout_limit = time.time() + RECONNECT_TIMEOUT
2384 while time.time() < timeout_limit:
2385 all_connected = True
2387 stats = rd.GetProcStatus()
2388 if not (stats.is_connected or stats.is_in_resync):
2389 all_connected = False
2390 if stats.is_standalone:
2391 # peer had different config info and this node became
2392 # standalone, even though this should not happen with the
2393 # new staged way of changing disk configs
2395 rd.AttachNet(multimaster)
2396 except errors.BlockDeviceError, err:
2397 return (False, "Can't change network configuration: %s" % str(err))
2400 time.sleep(sleep_time)
2401 sleep_time = min(5, sleep_time * 1.5)
2402 if not all_connected:
2403 return (False, "Timeout in disk reconnecting")
2405 # change to primary mode
2409 except errors.BlockDeviceError, err:
2410 return (False, "Can't change to primary mode: %s" % str(err))
2412 msg = "multi-master and primary"
2414 msg = "single-master"
2415 return (True, "Disks are now configured as %s" % msg)
2418 def DrbdWaitSync(nodes_ip, disks):
2419 """Wait until DRBDs have synchronized.
2422 status, bdevs = _FindDisks(nodes_ip, disks)
2424 return status, bdevs
2430 stats = rd.GetProcStatus()
2431 if not (stats.is_connected or stats.is_in_resync):
2434 alldone = alldone and (not stats.is_in_resync)
2435 if stats.sync_percent is not None:
2436 min_resync = min(min_resync, stats.sync_percent)
2437 return (not failure, (alldone, min_resync))
2440 class HooksRunner(object):
2443 This class is instantiated on the node side (ganeti-noded) and not
2447 RE_MASK = re.compile("^[a-zA-Z0-9_-]+$")
2449 def __init__(self, hooks_base_dir=None):
2450 """Constructor for hooks runner.
2452 @type hooks_base_dir: str or None
2453 @param hooks_base_dir: if not None, this overrides the
2454 L{constants.HOOKS_BASE_DIR} (useful for unittests)
2457 if hooks_base_dir is None:
2458 hooks_base_dir = constants.HOOKS_BASE_DIR
2459 self._BASE_DIR = hooks_base_dir
2462 def ExecHook(script, env):
2463 """Exec one hook script.
2466 @param script: the full path to the script
2468 @param env: the environment with which to exec the script
2469 @rtype: tuple (success, message)
2470 @return: a tuple of success and message, where success
2471 indicates the succes of the operation, and message
2472 which will contain the error details in case we
2476 # exec the process using subprocess and log the output
2479 fdstdin = open("/dev/null", "r")
2480 child = subprocess.Popen([script], stdin=fdstdin, stdout=subprocess.PIPE,
2481 stderr=subprocess.STDOUT, close_fds=True,
2482 shell=False, cwd="/", env=env)
2485 output = child.stdout.read(4096)
2486 child.stdout.close()
2487 except EnvironmentError, err:
2488 output += "Hook script error: %s" % str(err)
2492 result = child.wait()
2494 except EnvironmentError, err:
2495 if err.errno == errno.EINTR:
2499 # try not to leak fds
2500 for fd in (fdstdin, ):
2504 except EnvironmentError, err:
2505 # just log the error
2506 #logging.exception("Error while closing fd %s", fd)
2509 return result == 0, utils.SafeEncode(output.strip())
2511 def RunHooks(self, hpath, phase, env):
2512 """Run the scripts in the hooks directory.
2515 @param hpath: the path to the hooks directory which
2518 @param phase: either L{constants.HOOKS_PHASE_PRE} or
2519 L{constants.HOOKS_PHASE_POST}
2521 @param env: dictionary with the environment for the hook
2523 @return: list of 3-element tuples:
2525 - script result, either L{constants.HKR_SUCCESS} or
2526 L{constants.HKR_FAIL}
2527 - output of the script
2529 @raise errors.ProgrammerError: for invalid input
2533 if phase == constants.HOOKS_PHASE_PRE:
2535 elif phase == constants.HOOKS_PHASE_POST:
2538 raise errors.ProgrammerError("Unknown hooks phase: '%s'" % phase)
2541 subdir = "%s-%s.d" % (hpath, suffix)
2542 dir_name = "%s/%s" % (self._BASE_DIR, subdir)
2544 dir_contents = utils.ListVisibleFiles(dir_name)
2545 except OSError, err:
2546 # FIXME: must log output in case of failures
2549 # we use the standard python sort order,
2550 # so 00name is the recommended naming scheme
2552 for relname in dir_contents:
2553 fname = os.path.join(dir_name, relname)
2554 if not (os.path.isfile(fname) and os.access(fname, os.X_OK) and
2555 self.RE_MASK.match(relname) is not None):
2556 rrval = constants.HKR_SKIP
2559 result, output = self.ExecHook(fname, env)
2561 rrval = constants.HKR_FAIL
2563 rrval = constants.HKR_SUCCESS
2564 rr.append(("%s/%s" % (subdir, relname), rrval, output))
2569 class IAllocatorRunner(object):
2570 """IAllocator runner.
2572 This class is instantiated on the node side (ganeti-noded) and not on
2576 def Run(self, name, idata):
2577 """Run an iallocator script.
2580 @param name: the iallocator script name
2582 @param idata: the allocator input data
2585 @return: four element tuple of:
2586 - run status (one of the IARUN_ constants)
2589 - fail reason (as from L{utils.RunResult})
2592 alloc_script = utils.FindFile(name, constants.IALLOCATOR_SEARCH_PATH,
2594 if alloc_script is None:
2595 return (constants.IARUN_NOTFOUND, None, None, None)
2597 fd, fin_name = tempfile.mkstemp(prefix="ganeti-iallocator.")
2601 result = utils.RunCmd([alloc_script, fin_name])
2603 return (constants.IARUN_FAILURE, result.stdout, result.stderr,
2608 return (constants.IARUN_SUCCESS, result.stdout, result.stderr, None)
2611 class DevCacheManager(object):
2612 """Simple class for managing a cache of block device information.
2615 _DEV_PREFIX = "/dev/"
2616 _ROOT_DIR = constants.BDEV_CACHE_DIR
2619 def _ConvertPath(cls, dev_path):
2620 """Converts a /dev/name path to the cache file name.
2622 This replaces slashes with underscores and strips the /dev
2623 prefix. It then returns the full path to the cache file.
2626 @param dev_path: the C{/dev/} path name
2628 @return: the converted path name
2631 if dev_path.startswith(cls._DEV_PREFIX):
2632 dev_path = dev_path[len(cls._DEV_PREFIX):]
2633 dev_path = dev_path.replace("/", "_")
2634 fpath = "%s/bdev_%s" % (cls._ROOT_DIR, dev_path)
2638 def UpdateCache(cls, dev_path, owner, on_primary, iv_name):
2639 """Updates the cache information for a given device.
2642 @param dev_path: the pathname of the device
2644 @param owner: the owner (instance name) of the device
2645 @type on_primary: bool
2646 @param on_primary: whether this is the primary
2649 @param iv_name: the instance-visible name of the
2650 device, as in objects.Disk.iv_name
2655 if dev_path is None:
2656 logging.error("DevCacheManager.UpdateCache got a None dev_path")
2658 fpath = cls._ConvertPath(dev_path)
2664 iv_name = "not_visible"
2665 fdata = "%s %s %s\n" % (str(owner), state, iv_name)
2667 utils.WriteFile(fpath, data=fdata)
2668 except EnvironmentError, err:
2669 logging.exception("Can't update bdev cache for %s", dev_path)
2672 def RemoveCache(cls, dev_path):
2673 """Remove data for a dev_path.
2675 This is just a wrapper over L{utils.RemoveFile} with a converted
2676 path name and logging.
2679 @param dev_path: the pathname of the device
2684 if dev_path is None:
2685 logging.error("DevCacheManager.RemoveCache got a None dev_path")
2687 fpath = cls._ConvertPath(dev_path)
2689 utils.RemoveFile(fpath)
2690 except EnvironmentError, err:
2691 logging.exception("Can't update bdev cache for %s", dev_path)