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:
441 logging.warning("Can't get used minors list", exc_info=True)
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:
663 if name in output and output[name] != value:
664 raise errors.HypervisorError("Instance %s running duplicate"
665 " with different parameters" % name)
671 def InstanceOsAdd(instance):
672 """Add an OS to an instance.
674 @type instance: L{objects.Instance}
675 @param instance: Instance whose OS is to be installed
677 @return: the success of the operation
681 inst_os = OSFromDisk(instance.os)
682 except errors.InvalidOS, err:
683 os_name, os_dir, os_err = err.args
685 return (False, "Can't find OS '%s': %s" % (os_name, os_err))
687 return (False, "Error parsing OS '%s' in directory %s: %s" %
688 (os_name, os_dir, os_err))
690 create_env = OSEnvironment(instance)
692 logfile = "%s/add-%s-%s-%d.log" % (constants.LOG_OS_DIR, instance.os,
693 instance.name, int(time.time()))
695 result = utils.RunCmd([inst_os.create_script], env=create_env,
696 cwd=inst_os.path, output=logfile,)
698 logging.error("os create command '%s' returned error: %s, logfile: %s,"
699 " output: %s", result.cmd, result.fail_reason, logfile,
701 lines = [utils.SafeEncode(val)
702 for val in utils.TailFile(logfile, lines=20)]
703 return (False, "OS create script failed (%s), last lines in the"
704 " log file:\n%s" % (result.fail_reason, "\n".join(lines)))
706 return (True, "Successfully installed")
709 def RunRenameInstance(instance, old_name):
710 """Run the OS rename script for an instance.
712 @type instance: L{objects.Instance}
713 @param instance: Instance whose OS is to be installed
714 @type old_name: string
715 @param old_name: previous instance name
717 @return: the success of the operation
720 inst_os = OSFromDisk(instance.os)
722 rename_env = OSEnvironment(instance)
723 rename_env['OLD_INSTANCE_NAME'] = old_name
725 logfile = "%s/rename-%s-%s-%s-%d.log" % (constants.LOG_OS_DIR, instance.os,
727 instance.name, int(time.time()))
729 result = utils.RunCmd([inst_os.rename_script], env=rename_env,
730 cwd=inst_os.path, output=logfile)
733 logging.error("os create command '%s' returned error: %s output: %s",
734 result.cmd, result.fail_reason, result.output)
735 lines = [utils.SafeEncode(val)
736 for val in utils.TailFile(logfile, lines=20)]
737 return (False, "OS rename script failed (%s), last lines in the"
738 " log file:\n%s" % (result.fail_reason, "\n".join(lines)))
740 return (True, "Rename successful")
743 def _GetVGInfo(vg_name):
744 """Get informations about the volume group.
747 @param vg_name: the volume group which we query
750 A dictionary with the following keys:
751 - C{vg_size} is the total size of the volume group in MiB
752 - C{vg_free} is the free size of the volume group in MiB
753 - C{pv_count} are the number of physical disks in that VG
755 If an error occurs during gathering of data, we return the same dict
756 with keys all set to None.
759 retdic = dict.fromkeys(["vg_size", "vg_free", "pv_count"])
761 retval = utils.RunCmd(["vgs", "-ovg_size,vg_free,pv_count", "--noheadings",
762 "--nosuffix", "--units=m", "--separator=:", vg_name])
765 logging.error("volume group %s not present", vg_name)
767 valarr = retval.stdout.strip().rstrip(':').split(':')
771 "vg_size": int(round(float(valarr[0]), 0)),
772 "vg_free": int(round(float(valarr[1]), 0)),
773 "pv_count": int(valarr[2]),
775 except ValueError, err:
776 logging.exception("Fail to parse vgs output")
778 logging.error("vgs output has the wrong number of fields (expected"
779 " three): %s", str(valarr))
783 def _GetBlockDevSymlinkPath(instance_name, idx):
784 return os.path.join(constants.DISK_LINKS_DIR,
785 "%s:%d" % (instance_name, idx))
788 def _SymlinkBlockDev(instance_name, device_path, idx):
789 """Set up symlinks to a instance's block device.
791 This is an auxiliary function run when an instance is start (on the primary
792 node) or when an instance is migrated (on the target node).
795 @param instance_name: the name of the target instance
796 @param device_path: path of the physical block device, on the node
797 @param idx: the disk index
798 @return: absolute path to the disk's symlink
801 link_name = _GetBlockDevSymlinkPath(instance_name, idx)
803 os.symlink(device_path, link_name)
805 if err.errno == errno.EEXIST:
806 if (not os.path.islink(link_name) or
807 os.readlink(link_name) != device_path):
809 os.symlink(device_path, link_name)
816 def _RemoveBlockDevLinks(instance_name, disks):
817 """Remove the block device symlinks belonging to the given instance.
820 for idx, disk in enumerate(disks):
821 link_name = _GetBlockDevSymlinkPath(instance_name, idx)
822 if os.path.islink(link_name):
826 logging.exception("Can't remove symlink '%s'", link_name)
829 def _GatherAndLinkBlockDevs(instance):
830 """Set up an instance's block device(s).
832 This is run on the primary node at instance startup. The block
833 devices must be already assembled.
835 @type instance: L{objects.Instance}
836 @param instance: the instance whose disks we shoul assemble
838 @return: list of (disk_object, device_path)
842 for idx, disk in enumerate(instance.disks):
843 device = _RecursiveFindBD(disk)
845 raise errors.BlockDeviceError("Block device '%s' is not set up." %
849 link_name = _SymlinkBlockDev(instance.name, device.dev_path, idx)
851 raise errors.BlockDeviceError("Cannot create block device symlink: %s" %
854 block_devices.append((disk, link_name))
859 def StartInstance(instance, extra_args):
860 """Start an instance.
862 @type instance: L{objects.Instance}
863 @param instance: the instance object
865 @return: whether the startup was successful or not
868 running_instances = GetInstanceList([instance.hypervisor])
870 if instance.name in running_instances:
871 return (True, "Already running")
874 block_devices = _GatherAndLinkBlockDevs(instance)
875 hyper = hypervisor.GetHypervisor(instance.hypervisor)
876 hyper.StartInstance(instance, block_devices, extra_args)
877 except errors.BlockDeviceError, err:
878 logging.exception("Failed to start instance")
879 return (False, "Block device error: %s" % str(err))
880 except errors.HypervisorError, err:
881 logging.exception("Failed to start instance")
882 _RemoveBlockDevLinks(instance.name, instance.disks)
883 return (False, "Hypervisor error: %s" % str(err))
885 return (True, "Instance started successfully")
888 def InstanceShutdown(instance):
889 """Shut an instance down.
891 @note: this functions uses polling with a hardcoded timeout.
893 @type instance: L{objects.Instance}
894 @param instance: the instance object
896 @return: whether the startup was successful or not
899 hv_name = instance.hypervisor
900 running_instances = GetInstanceList([hv_name])
902 if instance.name not in running_instances:
903 return (True, "Instance already stopped")
905 hyper = hypervisor.GetHypervisor(hv_name)
907 hyper.StopInstance(instance)
908 except errors.HypervisorError, err:
909 msg = "Failed to stop instance %s: %s" % (instance.name, err)
913 # test every 10secs for 2min
916 for dummy in range(11):
917 if instance.name not in GetInstanceList([hv_name]):
921 # the shutdown did not succeed
922 logging.error("Shutdown of '%s' unsuccessful, using destroy",
926 hyper.StopInstance(instance, force=True)
927 except errors.HypervisorError, err:
928 msg = "Failed to force stop instance %s: %s" % (instance.name, err)
933 if instance.name in GetInstanceList([hv_name]):
934 msg = ("Could not shutdown instance %s even by destroy" %
939 _RemoveBlockDevLinks(instance.name, instance.disks)
941 return (True, "Instance has been shutdown successfully")
944 def InstanceReboot(instance, reboot_type, extra_args):
945 """Reboot an instance.
947 @type instance: L{objects.Instance}
948 @param instance: the instance object to reboot
949 @type reboot_type: str
950 @param reboot_type: the type of reboot, one the following
952 - L{constants.INSTANCE_REBOOT_SOFT}: only reboot the
953 instance OS, do not recreate the VM
954 - L{constants.INSTANCE_REBOOT_HARD}: tear down and
955 restart the VM (at the hypervisor level)
956 - the other reboot type (L{constants.INSTANCE_REBOOT_HARD})
957 is not accepted here, since that mode is handled
960 @return: the success of the operation
963 running_instances = GetInstanceList([instance.hypervisor])
965 if instance.name not in running_instances:
966 msg = "Cannot reboot instance %s that is not running" % instance.name
970 hyper = hypervisor.GetHypervisor(instance.hypervisor)
971 if reboot_type == constants.INSTANCE_REBOOT_SOFT:
973 hyper.RebootInstance(instance)
974 except errors.HypervisorError, err:
975 msg = "Failed to soft reboot instance %s: %s" % (instance.name, err)
978 elif reboot_type == constants.INSTANCE_REBOOT_HARD:
980 InstanceShutdown(instance)
981 StartInstance(instance, extra_args)
982 except errors.HypervisorError, err:
983 msg = "Failed to hard reboot instance %s: %s" % (instance.name, err)
987 return (False, "Invalid reboot_type received: %s" % (reboot_type,))
989 return (True, "Reboot successful")
992 def MigrationInfo(instance):
993 """Gather information about an instance to be migrated.
995 @type instance: L{objects.Instance}
996 @param instance: the instance definition
999 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1001 info = hyper.MigrationInfo(instance)
1002 except errors.HypervisorError, err:
1003 msg = "Failed to fetch migration information"
1004 logging.exception(msg)
1005 return (False, '%s: %s' % (msg, err))
1009 def AcceptInstance(instance, info, target):
1010 """Prepare the node to accept an instance.
1012 @type instance: L{objects.Instance}
1013 @param instance: the instance definition
1014 @type info: string/data (opaque)
1015 @param info: migration information, from the source node
1016 @type target: string
1017 @param target: target host (usually ip), on this node
1020 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1022 hyper.AcceptInstance(instance, info, target)
1023 except errors.HypervisorError, err:
1024 msg = "Failed to accept instance"
1025 logging.exception(msg)
1026 return (False, '%s: %s' % (msg, err))
1027 return (True, "Accept successfull")
1030 def FinalizeMigration(instance, info, success):
1031 """Finalize any preparation to accept an instance.
1033 @type instance: L{objects.Instance}
1034 @param instance: the instance definition
1035 @type info: string/data (opaque)
1036 @param info: migration information, from the source node
1037 @type success: boolean
1038 @param success: whether the migration was a success or a failure
1041 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1043 hyper.FinalizeMigration(instance, info, success)
1044 except errors.HypervisorError, err:
1045 msg = "Failed to finalize migration"
1046 logging.exception(msg)
1047 return (False, '%s: %s' % (msg, err))
1048 return (True, "Migration Finalized")
1051 def MigrateInstance(instance, target, live):
1052 """Migrates an instance to another node.
1054 @type instance: L{objects.Instance}
1055 @param instance: the instance definition
1056 @type target: string
1057 @param target: the target node name
1059 @param live: whether the migration should be done live or not (the
1060 interpretation of this parameter is left to the hypervisor)
1062 @return: a tuple of (success, msg) where:
1063 - succes is a boolean denoting the success/failure of the operation
1064 - msg is a string with details in case of failure
1067 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1070 hyper.MigrateInstance(instance.name, target, live)
1071 except errors.HypervisorError, err:
1072 msg = "Failed to migrate instance"
1073 logging.exception(msg)
1074 return (False, "%s: %s" % (msg, err))
1075 return (True, "Migration successfull")
1078 def BlockdevCreate(disk, size, owner, on_primary, info):
1079 """Creates a block device for an instance.
1081 @type disk: L{objects.Disk}
1082 @param disk: the object describing the disk we should create
1084 @param size: the size of the physical underlying device, in MiB
1086 @param owner: the name of the instance for which disk is created,
1087 used for device cache data
1088 @type on_primary: boolean
1089 @param on_primary: indicates if it is the primary node or not
1091 @param info: string that will be sent to the physical device
1092 creation, used for example to set (LVM) tags on LVs
1094 @return: the new unique_id of the device (this can sometime be
1095 computed only after creation), or None. On secondary nodes,
1096 it's not required to return anything.
1101 for child in disk.children:
1103 crdev = _RecursiveAssembleBD(child, owner, on_primary)
1104 except errors.BlockDeviceError, err:
1105 errmsg = "Can't assemble device %s: %s" % (child, err)
1106 logging.error(errmsg)
1107 return False, errmsg
1108 if on_primary or disk.AssembleOnSecondary():
1109 # we need the children open in case the device itself has to
1113 except errors.BlockDeviceError, err:
1114 errmsg = "Can't make child '%s' read-write: %s" % (child, err)
1115 logging.error(errmsg)
1116 return False, errmsg
1120 device = bdev.Create(disk.dev_type, disk.physical_id, clist, size)
1121 except errors.BlockDeviceError, err:
1122 return False, "Can't create block device: %s" % str(err)
1124 if on_primary or disk.AssembleOnSecondary():
1127 except errors.BlockDeviceError, err:
1128 errmsg = ("Can't assemble device after creation, very"
1129 " unusual event: %s" % str(err))
1130 logging.error(errmsg)
1131 return False, errmsg
1132 device.SetSyncSpeed(constants.SYNC_SPEED)
1133 if on_primary or disk.OpenOnSecondary():
1135 device.Open(force=True)
1136 except errors.BlockDeviceError, err:
1137 errmsg = ("Can't make device r/w after creation, very"
1138 " unusual event: %s" % str(err))
1139 logging.error(errmsg)
1140 return False, errmsg
1141 DevCacheManager.UpdateCache(device.dev_path, owner,
1142 on_primary, disk.iv_name)
1144 device.SetInfo(info)
1146 physical_id = device.unique_id
1147 return True, physical_id
1150 def BlockdevRemove(disk):
1151 """Remove a block device.
1153 @note: This is intended to be called recursively.
1155 @type disk: L{objects.Disk}
1156 @param disk: the disk object we should remove
1158 @return: the success of the operation
1164 rdev = _RecursiveFindBD(disk)
1165 except errors.BlockDeviceError, err:
1166 # probably can't attach
1167 logging.info("Can't attach to device %s in remove", disk)
1169 if rdev is not None:
1170 r_path = rdev.dev_path
1173 except errors.BlockDeviceError, err:
1174 msgs.append(str(err))
1177 DevCacheManager.RemoveCache(r_path)
1180 for child in disk.children:
1181 c_status, c_msg = BlockdevRemove(child)
1182 result = result and c_status
1183 if c_msg: # not an empty message
1186 return (result, "; ".join(msgs))
1189 def _RecursiveAssembleBD(disk, owner, as_primary):
1190 """Activate a block device for an instance.
1192 This is run on the primary and secondary nodes for an instance.
1194 @note: this function is called recursively.
1196 @type disk: L{objects.Disk}
1197 @param disk: the disk we try to assemble
1199 @param owner: the name of the instance which owns the disk
1200 @type as_primary: boolean
1201 @param as_primary: if we should make the block device
1204 @return: the assembled device or None (in case no device
1206 @raise errors.BlockDeviceError: in case there is an error
1207 during the activation of the children or the device
1213 mcn = disk.ChildrenNeeded()
1215 mcn = 0 # max number of Nones allowed
1217 mcn = len(disk.children) - mcn # max number of Nones
1218 for chld_disk in disk.children:
1220 cdev = _RecursiveAssembleBD(chld_disk, owner, as_primary)
1221 except errors.BlockDeviceError, err:
1222 if children.count(None) >= mcn:
1225 logging.error("Error in child activation (but continuing): %s",
1227 children.append(cdev)
1229 if as_primary or disk.AssembleOnSecondary():
1230 r_dev = bdev.Assemble(disk.dev_type, disk.physical_id, children)
1231 r_dev.SetSyncSpeed(constants.SYNC_SPEED)
1233 if as_primary or disk.OpenOnSecondary():
1235 DevCacheManager.UpdateCache(r_dev.dev_path, owner,
1236 as_primary, disk.iv_name)
1243 def BlockdevAssemble(disk, owner, as_primary):
1244 """Activate a block device for an instance.
1246 This is a wrapper over _RecursiveAssembleBD.
1248 @rtype: str or boolean
1249 @return: a C{/dev/...} path for primary nodes, and
1250 C{True} for secondary nodes
1254 result = "no error information"
1256 result = _RecursiveAssembleBD(disk, owner, as_primary)
1257 if isinstance(result, bdev.BlockDev):
1258 result = result.dev_path
1259 except errors.BlockDeviceError, err:
1260 result = "Error while assembling disk: %s" % str(err)
1262 return (status, result)
1265 def BlockdevShutdown(disk):
1266 """Shut down a block device.
1268 First, if the device is assembled (Attach() is successfull), then
1269 the device is shutdown. Then the children of the device are
1272 This function is called recursively. Note that we don't cache the
1273 children or such, as oppossed to assemble, shutdown of different
1274 devices doesn't require that the upper device was active.
1276 @type disk: L{objects.Disk}
1277 @param disk: the description of the disk we should
1280 @return: the success of the operation
1285 r_dev = _RecursiveFindBD(disk)
1286 if r_dev is not None:
1287 r_path = r_dev.dev_path
1290 DevCacheManager.RemoveCache(r_path)
1291 except errors.BlockDeviceError, err:
1292 msgs.append(str(err))
1296 for child in disk.children:
1297 c_status, c_msg = BlockdevShutdown(child)
1298 result = result and c_status
1299 if c_msg: # not an empty message
1302 return (result, "; ".join(msgs))
1305 def BlockdevAddchildren(parent_cdev, new_cdevs):
1306 """Extend a mirrored block device.
1308 @type parent_cdev: L{objects.Disk}
1309 @param parent_cdev: the disk to which we should add children
1310 @type new_cdevs: list of L{objects.Disk}
1311 @param new_cdevs: the list of children which we should add
1313 @return: the success of the operation
1316 parent_bdev = _RecursiveFindBD(parent_cdev)
1317 if parent_bdev is None:
1318 logging.error("Can't find parent device")
1320 new_bdevs = [_RecursiveFindBD(disk) for disk in new_cdevs]
1321 if new_bdevs.count(None) > 0:
1322 logging.error("Can't find new device(s) to add: %s:%s",
1323 new_bdevs, new_cdevs)
1325 parent_bdev.AddChildren(new_bdevs)
1329 def BlockdevRemovechildren(parent_cdev, new_cdevs):
1330 """Shrink a mirrored block device.
1332 @type parent_cdev: L{objects.Disk}
1333 @param parent_cdev: the disk from which we should remove children
1334 @type new_cdevs: list of L{objects.Disk}
1335 @param new_cdevs: the list of children which we should remove
1337 @return: the success of the operation
1340 parent_bdev = _RecursiveFindBD(parent_cdev)
1341 if parent_bdev is None:
1342 logging.error("Can't find parent in remove children: %s", parent_cdev)
1345 for disk in new_cdevs:
1346 rpath = disk.StaticDevPath()
1348 bd = _RecursiveFindBD(disk)
1350 logging.error("Can't find dynamic device %s while removing children",
1354 devs.append(bd.dev_path)
1357 parent_bdev.RemoveChildren(devs)
1361 def BlockdevGetmirrorstatus(disks):
1362 """Get the mirroring status of a list of devices.
1364 @type disks: list of L{objects.Disk}
1365 @param disks: the list of disks which we should query
1368 a list of (mirror_done, estimated_time) tuples, which
1369 are the result of L{bdev.BlockDev.CombinedSyncStatus}
1370 @raise errors.BlockDeviceError: if any of the disks cannot be
1376 rbd = _RecursiveFindBD(dsk)
1378 raise errors.BlockDeviceError("Can't find device %s" % str(dsk))
1379 stats.append(rbd.CombinedSyncStatus())
1383 def _RecursiveFindBD(disk):
1384 """Check if a device is activated.
1386 If so, return informations about the real device.
1388 @type disk: L{objects.Disk}
1389 @param disk: the disk object we need to find
1391 @return: None if the device can't be found,
1392 otherwise the device instance
1397 for chdisk in disk.children:
1398 children.append(_RecursiveFindBD(chdisk))
1400 return bdev.FindDevice(disk.dev_type, disk.physical_id, children)
1403 def BlockdevFind(disk):
1404 """Check if a device is activated.
1406 If it is, return informations about the real device.
1408 @type disk: L{objects.Disk}
1409 @param disk: the disk to find
1410 @rtype: None or tuple
1411 @return: None if the disk cannot be found, otherwise a
1412 tuple (device_path, major, minor, sync_percent,
1413 estimated_time, is_degraded)
1417 rbd = _RecursiveFindBD(disk)
1418 except errors.BlockDeviceError, err:
1419 return (False, str(err))
1422 return (True, (rbd.dev_path, rbd.major, rbd.minor) + rbd.GetSyncStatus())
1425 def UploadFile(file_name, data, mode, uid, gid, atime, mtime):
1426 """Write a file to the filesystem.
1428 This allows the master to overwrite(!) a file. It will only perform
1429 the operation if the file belongs to a list of configuration files.
1431 @type file_name: str
1432 @param file_name: the target file name
1434 @param data: the new contents of the file
1436 @param mode: the mode to give the file (can be None)
1438 @param uid: the owner of the file (can be -1 for default)
1440 @param gid: the group of the file (can be -1 for default)
1442 @param atime: the atime to set on the file (can be None)
1444 @param mtime: the mtime to set on the file (can be None)
1446 @return: the success of the operation; errors are logged
1447 in the node daemon log
1450 if not os.path.isabs(file_name):
1451 logging.error("Filename passed to UploadFile is not absolute: '%s'",
1456 constants.CLUSTER_CONF_FILE,
1457 constants.ETC_HOSTS,
1458 constants.SSH_KNOWN_HOSTS_FILE,
1459 constants.VNC_PASSWORD_FILE,
1462 if file_name not in allowed_files:
1463 logging.error("Filename passed to UploadFile not in allowed"
1464 " upload targets: '%s'", file_name)
1467 raw_data = _Decompress(data)
1469 utils.WriteFile(file_name, data=raw_data, mode=mode, uid=uid, gid=gid,
1470 atime=atime, mtime=mtime)
1474 def WriteSsconfFiles(values):
1475 """Update all ssconf files.
1477 Wrapper around the SimpleStore.WriteFiles.
1480 ssconf.SimpleStore().WriteFiles(values)
1483 def _ErrnoOrStr(err):
1484 """Format an EnvironmentError exception.
1486 If the L{err} argument has an errno attribute, it will be looked up
1487 and converted into a textual C{E...} description. Otherwise the
1488 string representation of the error will be returned.
1490 @type err: L{EnvironmentError}
1491 @param err: the exception to format
1494 if hasattr(err, 'errno'):
1495 detail = errno.errorcode[err.errno]
1501 def _OSOndiskVersion(name, os_dir):
1502 """Compute and return the API version of a given OS.
1504 This function will try to read the API version of the OS given by
1505 the 'name' parameter and residing in the 'os_dir' directory.
1508 @param name: the OS name we should look for
1510 @param os_dir: the directory inwhich we should look for the OS
1513 Either an integer denoting the version or None in the
1514 case when this is not a valid OS name.
1515 @raise errors.InvalidOS: if the OS cannot be found
1518 api_file = os.path.sep.join([os_dir, "ganeti_api_version"])
1521 st = os.stat(api_file)
1522 except EnvironmentError, err:
1523 raise errors.InvalidOS(name, os_dir, "'ganeti_api_version' file not"
1524 " found (%s)" % _ErrnoOrStr(err))
1526 if not stat.S_ISREG(stat.S_IFMT(st.st_mode)):
1527 raise errors.InvalidOS(name, os_dir, "'ganeti_api_version' file is not"
1533 api_versions = f.readlines()
1536 except EnvironmentError, err:
1537 raise errors.InvalidOS(name, os_dir, "error while reading the"
1538 " API version (%s)" % _ErrnoOrStr(err))
1540 api_versions = [version.strip() for version in api_versions]
1542 api_versions = [int(version) for version in api_versions]
1543 except (TypeError, ValueError), err:
1544 raise errors.InvalidOS(name, os_dir,
1545 "API version is not integer (%s)" % str(err))
1550 def DiagnoseOS(top_dirs=None):
1551 """Compute the validity for all OSes.
1553 @type top_dirs: list
1554 @param top_dirs: the list of directories in which to
1555 search (if not given defaults to
1556 L{constants.OS_SEARCH_PATH})
1557 @rtype: list of L{objects.OS}
1558 @return: an OS object for each name in all the given
1562 if top_dirs is None:
1563 top_dirs = constants.OS_SEARCH_PATH
1566 for dir_name in top_dirs:
1567 if os.path.isdir(dir_name):
1569 f_names = utils.ListVisibleFiles(dir_name)
1570 except EnvironmentError, err:
1571 logging.exception("Can't list the OS directory %s", dir_name)
1573 for name in f_names:
1575 os_inst = OSFromDisk(name, base_dir=dir_name)
1576 result.append(os_inst)
1577 except errors.InvalidOS, err:
1578 result.append(objects.OS.FromInvalidOS(err))
1583 def OSFromDisk(name, base_dir=None):
1584 """Create an OS instance from disk.
1586 This function will return an OS instance if the given name is a
1587 valid OS name. Otherwise, it will raise an appropriate
1588 L{errors.InvalidOS} exception, detailing why this is not a valid OS.
1590 @type base_dir: string
1591 @keyword base_dir: Base directory containing OS installations.
1592 Defaults to a search in all the OS_SEARCH_PATH dirs.
1593 @rtype: L{objects.OS}
1594 @return: the OS instance if we find a valid one
1595 @raise errors.InvalidOS: if we don't find a valid OS
1598 if base_dir is None:
1599 os_dir = utils.FindFile(name, constants.OS_SEARCH_PATH, os.path.isdir)
1601 raise errors.InvalidOS(name, None, "OS dir not found in search path")
1603 os_dir = os.path.sep.join([base_dir, name])
1605 api_versions = _OSOndiskVersion(name, os_dir)
1607 if constants.OS_API_VERSION not in api_versions:
1608 raise errors.InvalidOS(name, os_dir, "API version mismatch"
1609 " (found %s want %s)"
1610 % (api_versions, constants.OS_API_VERSION))
1612 # OS Scripts dictionary, we will populate it with the actual script names
1613 os_scripts = dict.fromkeys(constants.OS_SCRIPTS)
1615 for script in os_scripts:
1616 os_scripts[script] = os.path.sep.join([os_dir, script])
1619 st = os.stat(os_scripts[script])
1620 except EnvironmentError, err:
1621 raise errors.InvalidOS(name, os_dir, "'%s' script missing (%s)" %
1622 (script, _ErrnoOrStr(err)))
1624 if stat.S_IMODE(st.st_mode) & stat.S_IXUSR != stat.S_IXUSR:
1625 raise errors.InvalidOS(name, os_dir, "'%s' script not executable" %
1628 if not stat.S_ISREG(stat.S_IFMT(st.st_mode)):
1629 raise errors.InvalidOS(name, os_dir, "'%s' is not a regular file" %
1633 return objects.OS(name=name, path=os_dir, status=constants.OS_VALID_STATUS,
1634 create_script=os_scripts[constants.OS_SCRIPT_CREATE],
1635 export_script=os_scripts[constants.OS_SCRIPT_EXPORT],
1636 import_script=os_scripts[constants.OS_SCRIPT_IMPORT],
1637 rename_script=os_scripts[constants.OS_SCRIPT_RENAME],
1638 api_versions=api_versions)
1640 def OSEnvironment(instance, debug=0):
1641 """Calculate the environment for an os script.
1643 @type instance: L{objects.Instance}
1644 @param instance: target instance for the os script run
1645 @type debug: integer
1646 @param debug: debug level (0 or 1, for OS Api 10)
1648 @return: dict of environment variables
1649 @raise errors.BlockDeviceError: if the block device
1654 result['OS_API_VERSION'] = '%d' % constants.OS_API_VERSION
1655 result['INSTANCE_NAME'] = instance.name
1656 result['INSTANCE_OS'] = instance.os
1657 result['HYPERVISOR'] = instance.hypervisor
1658 result['DISK_COUNT'] = '%d' % len(instance.disks)
1659 result['NIC_COUNT'] = '%d' % len(instance.nics)
1660 result['DEBUG_LEVEL'] = '%d' % debug
1661 for idx, disk in enumerate(instance.disks):
1662 real_disk = _RecursiveFindBD(disk)
1663 if real_disk is None:
1664 raise errors.BlockDeviceError("Block device '%s' is not set up" %
1667 result['DISK_%d_PATH' % idx] = real_disk.dev_path
1668 result['DISK_%d_ACCESS' % idx] = disk.mode
1669 if constants.HV_DISK_TYPE in instance.hvparams:
1670 result['DISK_%d_FRONTEND_TYPE' % idx] = \
1671 instance.hvparams[constants.HV_DISK_TYPE]
1672 if disk.dev_type in constants.LDS_BLOCK:
1673 result['DISK_%d_BACKEND_TYPE' % idx] = 'block'
1674 elif disk.dev_type == constants.LD_FILE:
1675 result['DISK_%d_BACKEND_TYPE' % idx] = \
1676 'file:%s' % disk.physical_id[0]
1677 for idx, nic in enumerate(instance.nics):
1678 result['NIC_%d_MAC' % idx] = nic.mac
1680 result['NIC_%d_IP' % idx] = nic.ip
1681 result['NIC_%d_BRIDGE' % idx] = nic.bridge
1682 if constants.HV_NIC_TYPE in instance.hvparams:
1683 result['NIC_%d_FRONTEND_TYPE' % idx] = \
1684 instance.hvparams[constants.HV_NIC_TYPE]
1688 def BlockdevGrow(disk, amount):
1689 """Grow a stack of block devices.
1691 This function is called recursively, with the childrens being the
1692 first ones to resize.
1694 @type disk: L{objects.Disk}
1695 @param disk: the disk to be grown
1696 @rtype: (status, result)
1697 @return: a tuple with the status of the operation
1698 (True/False), and the errors message if status
1702 r_dev = _RecursiveFindBD(disk)
1704 return False, "Cannot find block device %s" % (disk,)
1708 except errors.BlockDeviceError, err:
1709 return False, str(err)
1714 def BlockdevSnapshot(disk):
1715 """Create a snapshot copy of a block device.
1717 This function is called recursively, and the snapshot is actually created
1718 just for the leaf lvm backend device.
1720 @type disk: L{objects.Disk}
1721 @param disk: the disk to be snapshotted
1723 @return: snapshot disk path
1727 if len(disk.children) == 1:
1728 # only one child, let's recurse on it
1729 return BlockdevSnapshot(disk.children[0])
1731 # more than one child, choose one that matches
1732 for child in disk.children:
1733 if child.size == disk.size:
1734 # return implies breaking the loop
1735 return BlockdevSnapshot(child)
1736 elif disk.dev_type == constants.LD_LV:
1737 r_dev = _RecursiveFindBD(disk)
1738 if r_dev is not None:
1739 # let's stay on the safe side and ask for the full size, for now
1740 return r_dev.Snapshot(disk.size)
1744 raise errors.ProgrammerError("Cannot snapshot non-lvm block device"
1745 " '%s' of type '%s'" %
1746 (disk.unique_id, disk.dev_type))
1749 def ExportSnapshot(disk, dest_node, instance, cluster_name, idx):
1750 """Export a block device snapshot to a remote node.
1752 @type disk: L{objects.Disk}
1753 @param disk: the description of the disk to export
1754 @type dest_node: str
1755 @param dest_node: the destination node to export to
1756 @type instance: L{objects.Instance}
1757 @param instance: the instance object to whom the disk belongs
1758 @type cluster_name: str
1759 @param cluster_name: the cluster name, needed for SSH hostalias
1761 @param idx: the index of the disk in the instance's disk list,
1762 used to export to the OS scripts environment
1764 @return: the success of the operation
1767 export_env = OSEnvironment(instance)
1769 inst_os = OSFromDisk(instance.os)
1770 export_script = inst_os.export_script
1772 logfile = "%s/exp-%s-%s-%s.log" % (constants.LOG_OS_DIR, inst_os.name,
1773 instance.name, int(time.time()))
1774 if not os.path.exists(constants.LOG_OS_DIR):
1775 os.mkdir(constants.LOG_OS_DIR, 0750)
1776 real_disk = _RecursiveFindBD(disk)
1777 if real_disk is None:
1778 raise errors.BlockDeviceError("Block device '%s' is not set up" %
1782 export_env['EXPORT_DEVICE'] = real_disk.dev_path
1783 export_env['EXPORT_INDEX'] = str(idx)
1785 destdir = os.path.join(constants.EXPORT_DIR, instance.name + ".new")
1786 destfile = disk.physical_id[1]
1788 # the target command is built out of three individual commands,
1789 # which are joined by pipes; we check each individual command for
1791 expcmd = utils.BuildShellCmd("cd %s; %s 2>%s", inst_os.path,
1792 export_script, logfile)
1796 destcmd = utils.BuildShellCmd("mkdir -p %s && cat > %s/%s",
1797 destdir, destdir, destfile)
1798 remotecmd = _GetSshRunner(cluster_name).BuildCmd(dest_node,
1799 constants.GANETI_RUNAS,
1802 # all commands have been checked, so we're safe to combine them
1803 command = '|'.join([expcmd, comprcmd, utils.ShellQuoteArgs(remotecmd)])
1805 result = utils.RunCmd(command, env=export_env)
1808 logging.error("os snapshot export command '%s' returned error: %s"
1809 " output: %s", command, result.fail_reason, result.output)
1815 def FinalizeExport(instance, snap_disks):
1816 """Write out the export configuration information.
1818 @type instance: L{objects.Instance}
1819 @param instance: the instance which we export, used for
1820 saving configuration
1821 @type snap_disks: list of L{objects.Disk}
1822 @param snap_disks: list of snapshot block devices, which
1823 will be used to get the actual name of the dump file
1826 @return: the success of the operation
1829 destdir = os.path.join(constants.EXPORT_DIR, instance.name + ".new")
1830 finaldestdir = os.path.join(constants.EXPORT_DIR, instance.name)
1832 config = objects.SerializableConfigParser()
1834 config.add_section(constants.INISECT_EXP)
1835 config.set(constants.INISECT_EXP, 'version', '0')
1836 config.set(constants.INISECT_EXP, 'timestamp', '%d' % int(time.time()))
1837 config.set(constants.INISECT_EXP, 'source', instance.primary_node)
1838 config.set(constants.INISECT_EXP, 'os', instance.os)
1839 config.set(constants.INISECT_EXP, 'compression', 'gzip')
1841 config.add_section(constants.INISECT_INS)
1842 config.set(constants.INISECT_INS, 'name', instance.name)
1843 config.set(constants.INISECT_INS, 'memory', '%d' %
1844 instance.beparams[constants.BE_MEMORY])
1845 config.set(constants.INISECT_INS, 'vcpus', '%d' %
1846 instance.beparams[constants.BE_VCPUS])
1847 config.set(constants.INISECT_INS, 'disk_template', instance.disk_template)
1850 for nic_count, nic in enumerate(instance.nics):
1852 config.set(constants.INISECT_INS, 'nic%d_mac' %
1853 nic_count, '%s' % nic.mac)
1854 config.set(constants.INISECT_INS, 'nic%d_ip' % nic_count, '%s' % nic.ip)
1855 config.set(constants.INISECT_INS, 'nic%d_bridge' % nic_count,
1857 # TODO: redundant: on load can read nics until it doesn't exist
1858 config.set(constants.INISECT_INS, 'nic_count' , '%d' % nic_total)
1861 for disk_count, disk in enumerate(snap_disks):
1864 config.set(constants.INISECT_INS, 'disk%d_ivname' % disk_count,
1865 ('%s' % disk.iv_name))
1866 config.set(constants.INISECT_INS, 'disk%d_dump' % disk_count,
1867 ('%s' % disk.physical_id[1]))
1868 config.set(constants.INISECT_INS, 'disk%d_size' % disk_count,
1871 config.set(constants.INISECT_INS, 'disk_count' , '%d' % disk_total)
1873 utils.WriteFile(os.path.join(destdir, constants.EXPORT_CONF_FILE),
1874 data=config.Dumps())
1875 shutil.rmtree(finaldestdir, True)
1876 shutil.move(destdir, finaldestdir)
1881 def ExportInfo(dest):
1882 """Get export configuration information.
1885 @param dest: directory containing the export
1887 @rtype: L{objects.SerializableConfigParser}
1888 @return: a serializable config file containing the
1892 cff = os.path.join(dest, constants.EXPORT_CONF_FILE)
1894 config = objects.SerializableConfigParser()
1897 if (not config.has_section(constants.INISECT_EXP) or
1898 not config.has_section(constants.INISECT_INS)):
1904 def ImportOSIntoInstance(instance, src_node, src_images, cluster_name):
1905 """Import an os image into an instance.
1907 @type instance: L{objects.Instance}
1908 @param instance: instance to import the disks into
1909 @type src_node: string
1910 @param src_node: source node for the disk images
1911 @type src_images: list of string
1912 @param src_images: absolute paths of the disk images
1913 @rtype: list of boolean
1914 @return: each boolean represent the success of importing the n-th disk
1917 import_env = OSEnvironment(instance)
1918 inst_os = OSFromDisk(instance.os)
1919 import_script = inst_os.import_script
1921 logfile = "%s/import-%s-%s-%s.log" % (constants.LOG_OS_DIR, instance.os,
1922 instance.name, int(time.time()))
1923 if not os.path.exists(constants.LOG_OS_DIR):
1924 os.mkdir(constants.LOG_OS_DIR, 0750)
1927 impcmd = utils.BuildShellCmd("(cd %s; %s >%s 2>&1)", inst_os.path,
1928 import_script, logfile)
1931 for idx, image in enumerate(src_images):
1933 destcmd = utils.BuildShellCmd('cat %s', image)
1934 remotecmd = _GetSshRunner(cluster_name).BuildCmd(src_node,
1935 constants.GANETI_RUNAS,
1937 command = '|'.join([utils.ShellQuoteArgs(remotecmd), comprcmd, impcmd])
1938 import_env['IMPORT_DEVICE'] = import_env['DISK_%d_PATH' % idx]
1939 import_env['IMPORT_INDEX'] = str(idx)
1940 result = utils.RunCmd(command, env=import_env)
1942 logging.error("Disk import command '%s' returned error: %s"
1943 " output: %s", command, result.fail_reason,
1945 final_result.append(False)
1947 final_result.append(True)
1949 final_result.append(True)
1955 """Return a list of exports currently available on this machine.
1958 @return: list of the exports
1961 if os.path.isdir(constants.EXPORT_DIR):
1962 return utils.ListVisibleFiles(constants.EXPORT_DIR)
1967 def RemoveExport(export):
1968 """Remove an existing export from the node.
1971 @param export: the name of the export to remove
1973 @return: the success of the operation
1976 target = os.path.join(constants.EXPORT_DIR, export)
1978 shutil.rmtree(target)
1979 # TODO: catch some of the relevant exceptions and provide a pretty
1980 # error message if rmtree fails.
1985 def BlockdevRename(devlist):
1986 """Rename a list of block devices.
1988 @type devlist: list of tuples
1989 @param devlist: list of tuples of the form (disk,
1990 new_logical_id, new_physical_id); disk is an
1991 L{objects.Disk} object describing the current disk,
1992 and new logical_id/physical_id is the name we
1995 @return: True if all renames succeeded, False otherwise
1999 for disk, unique_id in devlist:
2000 dev = _RecursiveFindBD(disk)
2005 old_rpath = dev.dev_path
2006 dev.Rename(unique_id)
2007 new_rpath = dev.dev_path
2008 if old_rpath != new_rpath:
2009 DevCacheManager.RemoveCache(old_rpath)
2010 # FIXME: we should add the new cache information here, like:
2011 # DevCacheManager.UpdateCache(new_rpath, owner, ...)
2012 # but we don't have the owner here - maybe parse from existing
2013 # cache? for now, we only lose lvm data when we rename, which
2014 # is less critical than DRBD or MD
2015 except errors.BlockDeviceError, err:
2016 logging.exception("Can't rename device '%s' to '%s'", dev, unique_id)
2021 def _TransformFileStorageDir(file_storage_dir):
2022 """Checks whether given file_storage_dir is valid.
2024 Checks wheter the given file_storage_dir is within the cluster-wide
2025 default file_storage_dir stored in SimpleStore. Only paths under that
2026 directory are allowed.
2028 @type file_storage_dir: str
2029 @param file_storage_dir: the path to check
2031 @return: the normalized path if valid, None otherwise
2035 file_storage_dir = os.path.normpath(file_storage_dir)
2036 base_file_storage_dir = cfg.GetFileStorageDir()
2037 if (not os.path.commonprefix([file_storage_dir, base_file_storage_dir]) ==
2038 base_file_storage_dir):
2039 logging.error("file storage directory '%s' is not under base file"
2040 " storage directory '%s'",
2041 file_storage_dir, base_file_storage_dir)
2043 return file_storage_dir
2046 def CreateFileStorageDir(file_storage_dir):
2047 """Create file storage directory.
2049 @type file_storage_dir: str
2050 @param file_storage_dir: directory to create
2053 @return: tuple with first element a boolean indicating wheter dir
2054 creation was successful or not
2057 file_storage_dir = _TransformFileStorageDir(file_storage_dir)
2059 if not file_storage_dir:
2062 if os.path.exists(file_storage_dir):
2063 if not os.path.isdir(file_storage_dir):
2064 logging.error("'%s' is not a directory", file_storage_dir)
2068 os.makedirs(file_storage_dir, 0750)
2069 except OSError, err:
2070 logging.error("Cannot create file storage directory '%s': %s",
2071 file_storage_dir, err)
2076 def RemoveFileStorageDir(file_storage_dir):
2077 """Remove file storage directory.
2079 Remove it only if it's empty. If not log an error and return.
2081 @type file_storage_dir: str
2082 @param file_storage_dir: the directory we should cleanup
2083 @rtype: tuple (success,)
2084 @return: tuple of one element, C{success}, denoting
2085 whether the operation was successfull
2088 file_storage_dir = _TransformFileStorageDir(file_storage_dir)
2090 if not file_storage_dir:
2093 if os.path.exists(file_storage_dir):
2094 if not os.path.isdir(file_storage_dir):
2095 logging.error("'%s' is not a directory", file_storage_dir)
2097 # deletes dir only if empty, otherwise we want to return False
2099 os.rmdir(file_storage_dir)
2100 except OSError, err:
2101 logging.exception("Cannot remove file storage directory '%s'",
2107 def RenameFileStorageDir(old_file_storage_dir, new_file_storage_dir):
2108 """Rename the file storage directory.
2110 @type old_file_storage_dir: str
2111 @param old_file_storage_dir: the current path
2112 @type new_file_storage_dir: str
2113 @param new_file_storage_dir: the name we should rename to
2114 @rtype: tuple (success,)
2115 @return: tuple of one element, C{success}, denoting
2116 whether the operation was successful
2119 old_file_storage_dir = _TransformFileStorageDir(old_file_storage_dir)
2120 new_file_storage_dir = _TransformFileStorageDir(new_file_storage_dir)
2122 if not old_file_storage_dir or not new_file_storage_dir:
2125 if not os.path.exists(new_file_storage_dir):
2126 if os.path.isdir(old_file_storage_dir):
2128 os.rename(old_file_storage_dir, new_file_storage_dir)
2129 except OSError, err:
2130 logging.exception("Cannot rename '%s' to '%s'",
2131 old_file_storage_dir, new_file_storage_dir)
2134 logging.error("'%s' is not a directory", old_file_storage_dir)
2137 if os.path.exists(old_file_storage_dir):
2138 logging.error("Cannot rename '%s' to '%s'. Both locations exist.",
2139 old_file_storage_dir, new_file_storage_dir)
2144 def _IsJobQueueFile(file_name):
2145 """Checks whether the given filename is in the queue directory.
2147 @type file_name: str
2148 @param file_name: the file name we should check
2150 @return: whether the file is under the queue directory
2153 queue_dir = os.path.normpath(constants.QUEUE_DIR)
2154 result = (os.path.commonprefix([queue_dir, file_name]) == queue_dir)
2157 logging.error("'%s' is not a file in the queue directory",
2163 def JobQueueUpdate(file_name, content):
2164 """Updates a file in the queue directory.
2166 This is just a wrapper over L{utils.WriteFile}, with proper
2169 @type file_name: str
2170 @param file_name: the job file name
2172 @param content: the new job contents
2174 @return: the success of the operation
2177 if not _IsJobQueueFile(file_name):
2180 # Write and replace the file atomically
2181 utils.WriteFile(file_name, data=_Decompress(content))
2186 def JobQueueRename(old, new):
2187 """Renames a job queue file.
2189 This is just a wrapper over os.rename with proper checking.
2192 @param old: the old (actual) file name
2194 @param new: the desired file name
2196 @return: the success of the operation
2199 if not (_IsJobQueueFile(old) and _IsJobQueueFile(new)):
2202 utils.RenameFile(old, new, mkdir=True)
2207 def JobQueueSetDrainFlag(drain_flag):
2208 """Set the drain flag for the queue.
2210 This will set or unset the queue drain flag.
2212 @type drain_flag: boolean
2213 @param drain_flag: if True, will set the drain flag, otherwise reset it.
2215 @return: always True
2216 @warning: the function always returns True
2220 utils.WriteFile(constants.JOB_QUEUE_DRAIN_FILE, data="", close=True)
2222 utils.RemoveFile(constants.JOB_QUEUE_DRAIN_FILE)
2227 def BlockdevClose(instance_name, disks):
2228 """Closes the given block devices.
2230 This means they will be switched to secondary mode (in case of
2233 @param instance_name: if the argument is not empty, the symlinks
2234 of this instance will be removed
2235 @type disks: list of L{objects.Disk}
2236 @param disks: the list of disks to be closed
2237 @rtype: tuple (success, message)
2238 @return: a tuple of success and message, where success
2239 indicates the succes of the operation, and message
2240 which will contain the error details in case we
2246 rd = _RecursiveFindBD(cf)
2248 return (False, "Can't find device %s" % cf)
2255 except errors.BlockDeviceError, err:
2256 msg.append(str(err))
2258 return (False, "Can't make devices secondary: %s" % ",".join(msg))
2261 _RemoveBlockDevLinks(instance_name, disks)
2262 return (True, "All devices secondary")
2265 def ValidateHVParams(hvname, hvparams):
2266 """Validates the given hypervisor parameters.
2268 @type hvname: string
2269 @param hvname: the hypervisor name
2270 @type hvparams: dict
2271 @param hvparams: the hypervisor parameters to be validated
2272 @rtype: tuple (success, message)
2273 @return: a tuple of success and message, where success
2274 indicates the succes of the operation, and message
2275 which will contain the error details in case we
2280 hv_type = hypervisor.GetHypervisor(hvname)
2281 hv_type.ValidateParameters(hvparams)
2282 return (True, "Validation passed")
2283 except errors.HypervisorError, err:
2284 return (False, str(err))
2288 """Demotes the current node from master candidate role.
2291 # try to ensure we're not the master by mistake
2292 master, myself = ssconf.GetMasterAndMyself()
2293 if master == myself:
2294 return (False, "ssconf status shows I'm the master node, will not demote")
2295 pid_file = utils.DaemonPidFileName(constants.MASTERD_PID)
2296 if utils.IsProcessAlive(utils.ReadPidFile(pid_file)):
2297 return (False, "The master daemon is running, will not demote")
2299 utils.CreateBackup(constants.CLUSTER_CONF_FILE)
2300 except EnvironmentError, err:
2301 if err.errno != errno.ENOENT:
2302 return (False, "Error while backing up cluster file: %s" % str(err))
2303 utils.RemoveFile(constants.CLUSTER_CONF_FILE)
2304 return (True, "Done")
2307 def _FindDisks(nodes_ip, disks):
2308 """Sets the physical ID on disks and returns the block devices.
2311 # set the correct physical ID
2312 my_name = utils.HostInfo().name
2314 cf.SetPhysicalID(my_name, nodes_ip)
2319 rd = _RecursiveFindBD(cf)
2321 return (False, "Can't find device %s" % cf)
2323 return (True, bdevs)
2326 def DrbdDisconnectNet(nodes_ip, disks):
2327 """Disconnects the network on a list of drbd devices.
2330 status, bdevs = _FindDisks(nodes_ip, disks)
2332 return status, bdevs
2338 except errors.BlockDeviceError, err:
2339 logging.exception("Failed to go into standalone mode")
2340 return (False, "Can't change network configuration: %s" % str(err))
2341 return (True, "All disks are now disconnected")
2344 def DrbdAttachNet(nodes_ip, disks, instance_name, multimaster):
2345 """Attaches the network on a list of drbd devices.
2348 status, bdevs = _FindDisks(nodes_ip, disks)
2350 return status, bdevs
2353 for idx, rd in enumerate(bdevs):
2355 _SymlinkBlockDev(instance_name, rd.dev_path, idx)
2356 except EnvironmentError, err:
2357 return (False, "Can't create symlink: %s" % str(err))
2358 # reconnect disks, switch to new master configuration and if
2359 # needed primary mode
2362 rd.AttachNet(multimaster)
2363 except errors.BlockDeviceError, err:
2364 return (False, "Can't change network configuration: %s" % str(err))
2365 # wait until the disks are connected; we need to retry the re-attach
2366 # if the device becomes standalone, as this might happen if the one
2367 # node disconnects and reconnects in a different mode before the
2368 # other node reconnects; in this case, one or both of the nodes will
2369 # decide it has wrong configuration and switch to standalone
2370 RECONNECT_TIMEOUT = 2 * 60
2371 sleep_time = 0.100 # start with 100 miliseconds
2372 timeout_limit = time.time() + RECONNECT_TIMEOUT
2373 while time.time() < timeout_limit:
2374 all_connected = True
2376 stats = rd.GetProcStatus()
2377 if not (stats.is_connected or stats.is_in_resync):
2378 all_connected = False
2379 if stats.is_standalone:
2380 # peer had different config info and this node became
2381 # standalone, even though this should not happen with the
2382 # new staged way of changing disk configs
2384 rd.ReAttachNet(multimaster)
2385 except errors.BlockDeviceError, err:
2386 return (False, "Can't change network configuration: %s" % str(err))
2389 time.sleep(sleep_time)
2390 sleep_time = min(5, sleep_time * 1.5)
2391 if not all_connected:
2392 return (False, "Timeout in disk reconnecting")
2394 # change to primary mode
2398 except errors.BlockDeviceError, err:
2399 return (False, "Can't change to primary mode: %s" % str(err))
2401 msg = "multi-master and primary"
2403 msg = "single-master"
2404 return (True, "Disks are now configured as %s" % msg)
2407 def DrbdWaitSync(nodes_ip, disks):
2408 """Wait until DRBDs have synchronized.
2411 status, bdevs = _FindDisks(nodes_ip, disks)
2413 return status, bdevs
2419 stats = rd.GetProcStatus()
2420 if not (stats.is_connected or stats.is_in_resync):
2423 alldone = alldone and (not stats.is_in_resync)
2424 if stats.sync_percent is not None:
2425 min_resync = min(min_resync, stats.sync_percent)
2426 return (not failure, (alldone, min_resync))
2429 class HooksRunner(object):
2432 This class is instantiated on the node side (ganeti-noded) and not
2436 RE_MASK = re.compile("^[a-zA-Z0-9_-]+$")
2438 def __init__(self, hooks_base_dir=None):
2439 """Constructor for hooks runner.
2441 @type hooks_base_dir: str or None
2442 @param hooks_base_dir: if not None, this overrides the
2443 L{constants.HOOKS_BASE_DIR} (useful for unittests)
2446 if hooks_base_dir is None:
2447 hooks_base_dir = constants.HOOKS_BASE_DIR
2448 self._BASE_DIR = hooks_base_dir
2451 def ExecHook(script, env):
2452 """Exec one hook script.
2455 @param script: the full path to the script
2457 @param env: the environment with which to exec the script
2458 @rtype: tuple (success, message)
2459 @return: a tuple of success and message, where success
2460 indicates the succes of the operation, and message
2461 which will contain the error details in case we
2465 # exec the process using subprocess and log the output
2468 fdstdin = open("/dev/null", "r")
2469 child = subprocess.Popen([script], stdin=fdstdin, stdout=subprocess.PIPE,
2470 stderr=subprocess.STDOUT, close_fds=True,
2471 shell=False, cwd="/", env=env)
2474 output = child.stdout.read(4096)
2475 child.stdout.close()
2476 except EnvironmentError, err:
2477 output += "Hook script error: %s" % str(err)
2481 result = child.wait()
2483 except EnvironmentError, err:
2484 if err.errno == errno.EINTR:
2488 # try not to leak fds
2489 for fd in (fdstdin, ):
2493 except EnvironmentError, err:
2494 # just log the error
2495 #logging.exception("Error while closing fd %s", fd)
2498 return result == 0, utils.SafeEncode(output.strip())
2500 def RunHooks(self, hpath, phase, env):
2501 """Run the scripts in the hooks directory.
2504 @param hpath: the path to the hooks directory which
2507 @param phase: either L{constants.HOOKS_PHASE_PRE} or
2508 L{constants.HOOKS_PHASE_POST}
2510 @param env: dictionary with the environment for the hook
2512 @return: list of 3-element tuples:
2514 - script result, either L{constants.HKR_SUCCESS} or
2515 L{constants.HKR_FAIL}
2516 - output of the script
2518 @raise errors.ProgrammerError: for invalid input
2522 if phase == constants.HOOKS_PHASE_PRE:
2524 elif phase == constants.HOOKS_PHASE_POST:
2527 raise errors.ProgrammerError("Unknown hooks phase: '%s'" % phase)
2530 subdir = "%s-%s.d" % (hpath, suffix)
2531 dir_name = "%s/%s" % (self._BASE_DIR, subdir)
2533 dir_contents = utils.ListVisibleFiles(dir_name)
2534 except OSError, err:
2535 # FIXME: must log output in case of failures
2538 # we use the standard python sort order,
2539 # so 00name is the recommended naming scheme
2541 for relname in dir_contents:
2542 fname = os.path.join(dir_name, relname)
2543 if not (os.path.isfile(fname) and os.access(fname, os.X_OK) and
2544 self.RE_MASK.match(relname) is not None):
2545 rrval = constants.HKR_SKIP
2548 result, output = self.ExecHook(fname, env)
2550 rrval = constants.HKR_FAIL
2552 rrval = constants.HKR_SUCCESS
2553 rr.append(("%s/%s" % (subdir, relname), rrval, output))
2558 class IAllocatorRunner(object):
2559 """IAllocator runner.
2561 This class is instantiated on the node side (ganeti-noded) and not on
2565 def Run(self, name, idata):
2566 """Run an iallocator script.
2569 @param name: the iallocator script name
2571 @param idata: the allocator input data
2574 @return: four element tuple of:
2575 - run status (one of the IARUN_ constants)
2578 - fail reason (as from L{utils.RunResult})
2581 alloc_script = utils.FindFile(name, constants.IALLOCATOR_SEARCH_PATH,
2583 if alloc_script is None:
2584 return (constants.IARUN_NOTFOUND, None, None, None)
2586 fd, fin_name = tempfile.mkstemp(prefix="ganeti-iallocator.")
2590 result = utils.RunCmd([alloc_script, fin_name])
2592 return (constants.IARUN_FAILURE, result.stdout, result.stderr,
2597 return (constants.IARUN_SUCCESS, result.stdout, result.stderr, None)
2600 class DevCacheManager(object):
2601 """Simple class for managing a cache of block device information.
2604 _DEV_PREFIX = "/dev/"
2605 _ROOT_DIR = constants.BDEV_CACHE_DIR
2608 def _ConvertPath(cls, dev_path):
2609 """Converts a /dev/name path to the cache file name.
2611 This replaces slashes with underscores and strips the /dev
2612 prefix. It then returns the full path to the cache file.
2615 @param dev_path: the C{/dev/} path name
2617 @return: the converted path name
2620 if dev_path.startswith(cls._DEV_PREFIX):
2621 dev_path = dev_path[len(cls._DEV_PREFIX):]
2622 dev_path = dev_path.replace("/", "_")
2623 fpath = "%s/bdev_%s" % (cls._ROOT_DIR, dev_path)
2627 def UpdateCache(cls, dev_path, owner, on_primary, iv_name):
2628 """Updates the cache information for a given device.
2631 @param dev_path: the pathname of the device
2633 @param owner: the owner (instance name) of the device
2634 @type on_primary: bool
2635 @param on_primary: whether this is the primary
2638 @param iv_name: the instance-visible name of the
2639 device, as in objects.Disk.iv_name
2644 if dev_path is None:
2645 logging.error("DevCacheManager.UpdateCache got a None dev_path")
2647 fpath = cls._ConvertPath(dev_path)
2653 iv_name = "not_visible"
2654 fdata = "%s %s %s\n" % (str(owner), state, iv_name)
2656 utils.WriteFile(fpath, data=fdata)
2657 except EnvironmentError, err:
2658 logging.exception("Can't update bdev cache for %s", dev_path)
2661 def RemoveCache(cls, dev_path):
2662 """Remove data for a dev_path.
2664 This is just a wrapper over L{utils.RemoveFile} with a converted
2665 path name and logging.
2668 @param dev_path: the pathname of the device
2673 if dev_path is None:
2674 logging.error("DevCacheManager.RemoveCache got a None dev_path")
2676 fpath = cls._ConvertPath(dev_path)
2678 utils.RemoveFile(fpath)
2679 except EnvironmentError, err:
2680 logging.exception("Can't update bdev cache for %s", dev_path)