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)
578 # FIXME: should we somehow not propagate this to the master?
584 def GetInstanceInfo(instance, hname):
585 """Gives back the informations about an instance as a dictionary.
587 @type instance: string
588 @param instance: the instance name
590 @param hname: the hypervisor type of the instance
593 @return: dictionary with the following keys:
594 - memory: memory size of instance (int)
595 - state: xen state of instance (string)
596 - time: cpu time of instance (float)
601 iinfo = hypervisor.GetHypervisor(hname).GetInstanceInfo(instance)
602 if iinfo is not None:
603 output['memory'] = iinfo[2]
604 output['state'] = iinfo[4]
605 output['time'] = iinfo[5]
610 def GetInstanceMigratable(instance):
611 """Gives whether an instance can be migrated.
613 @type instance: L{objects.Instance}
614 @param instance: object representing the instance to be checked.
617 @return: tuple of (result, description) where:
618 - result: whether the instance can be migrated or not
619 - description: a description of the issue, if relevant
622 hyper = hypervisor.GetHypervisor(instance.hypervisor)
623 if instance.name not in hyper.ListInstances():
624 return (False, 'not running')
626 for idx in range(len(instance.disks)):
627 link_name = _GetBlockDevSymlinkPath(instance.name, idx)
628 if not os.path.islink(link_name):
629 return (False, 'not restarted since ganeti 1.2.5')
634 def GetAllInstancesInfo(hypervisor_list):
635 """Gather data about all instances.
637 This is the equivalent of L{GetInstanceInfo}, except that it
638 computes data for all instances at once, thus being faster if one
639 needs data about more than one instance.
641 @type hypervisor_list: list
642 @param hypervisor_list: list of hypervisors to query for instance data
645 @return: dictionary of instance: data, with data having the following keys:
646 - memory: memory size of instance (int)
647 - state: xen state of instance (string)
648 - time: cpu time of instance (float)
649 - vcpus: the number of vcpus
654 for hname in hypervisor_list:
655 iinfo = hypervisor.GetHypervisor(hname).GetAllInstancesInfo()
657 for name, inst_id, memory, vcpus, state, times in iinfo:
664 if name in output and output[name] != value:
665 raise errors.HypervisorError("Instance %s running duplicate"
666 " with different parameters" % name)
672 def InstanceOsAdd(instance):
673 """Add an OS to an instance.
675 @type instance: L{objects.Instance}
676 @param instance: Instance whose OS is to be installed
678 @return: the success of the operation
682 inst_os = OSFromDisk(instance.os)
683 except errors.InvalidOS, err:
684 os_name, os_dir, os_err = err.args
686 return (False, "Can't find OS '%s': %s" % (os_name, os_err))
688 return (False, "Error parsing OS '%s' in directory %s: %s" %
689 (os_name, os_dir, os_err))
691 create_env = OSEnvironment(instance)
693 logfile = "%s/add-%s-%s-%d.log" % (constants.LOG_OS_DIR, instance.os,
694 instance.name, int(time.time()))
696 result = utils.RunCmd([inst_os.create_script], env=create_env,
697 cwd=inst_os.path, output=logfile,)
699 logging.error("os create command '%s' returned error: %s, logfile: %s,"
700 " output: %s", result.cmd, result.fail_reason, logfile,
702 lines = [utils.SafeEncode(val)
703 for val in utils.TailFile(logfile, lines=20)]
704 return (False, "OS create script failed (%s), last lines in the"
705 " log file:\n%s" % (result.fail_reason, "\n".join(lines)))
707 return (True, "Successfully installed")
710 def RunRenameInstance(instance, old_name):
711 """Run the OS rename script for an instance.
713 @type instance: L{objects.Instance}
714 @param instance: Instance whose OS is to be installed
715 @type old_name: string
716 @param old_name: previous instance name
718 @return: the success of the operation
721 inst_os = OSFromDisk(instance.os)
723 rename_env = OSEnvironment(instance)
724 rename_env['OLD_INSTANCE_NAME'] = old_name
726 logfile = "%s/rename-%s-%s-%s-%d.log" % (constants.LOG_OS_DIR, instance.os,
728 instance.name, int(time.time()))
730 result = utils.RunCmd([inst_os.rename_script], env=rename_env,
731 cwd=inst_os.path, output=logfile)
734 logging.error("os create command '%s' returned error: %s output: %s",
735 result.cmd, result.fail_reason, result.output)
736 lines = [utils.SafeEncode(val)
737 for val in utils.TailFile(logfile, lines=20)]
738 return (False, "OS rename script failed (%s), last lines in the"
739 " log file:\n%s" % (result.fail_reason, "\n".join(lines)))
741 return (True, "Rename successful")
744 def _GetVGInfo(vg_name):
745 """Get informations about the volume group.
748 @param vg_name: the volume group which we query
751 A dictionary with the following keys:
752 - C{vg_size} is the total size of the volume group in MiB
753 - C{vg_free} is the free size of the volume group in MiB
754 - C{pv_count} are the number of physical disks in that VG
756 If an error occurs during gathering of data, we return the same dict
757 with keys all set to None.
760 retdic = dict.fromkeys(["vg_size", "vg_free", "pv_count"])
762 retval = utils.RunCmd(["vgs", "-ovg_size,vg_free,pv_count", "--noheadings",
763 "--nosuffix", "--units=m", "--separator=:", vg_name])
766 logging.error("volume group %s not present", vg_name)
768 valarr = retval.stdout.strip().rstrip(':').split(':')
772 "vg_size": int(round(float(valarr[0]), 0)),
773 "vg_free": int(round(float(valarr[1]), 0)),
774 "pv_count": int(valarr[2]),
776 except ValueError, err:
777 logging.exception("Fail to parse vgs output")
779 logging.error("vgs output has the wrong number of fields (expected"
780 " three): %s", str(valarr))
784 def _GetBlockDevSymlinkPath(instance_name, idx):
785 return os.path.join(constants.DISK_LINKS_DIR,
786 "%s:%d" % (instance_name, idx))
789 def _SymlinkBlockDev(instance_name, device_path, idx):
790 """Set up symlinks to a instance's block device.
792 This is an auxiliary function run when an instance is start (on the primary
793 node) or when an instance is migrated (on the target node).
796 @param instance_name: the name of the target instance
797 @param device_path: path of the physical block device, on the node
798 @param idx: the disk index
799 @return: absolute path to the disk's symlink
802 link_name = _GetBlockDevSymlinkPath(instance_name, idx)
804 os.symlink(device_path, link_name)
806 if err.errno == errno.EEXIST:
807 if (not os.path.islink(link_name) or
808 os.readlink(link_name) != device_path):
810 os.symlink(device_path, link_name)
817 def _RemoveBlockDevLinks(instance_name, disks):
818 """Remove the block device symlinks belonging to the given instance.
821 for idx, disk in enumerate(disks):
822 link_name = _GetBlockDevSymlinkPath(instance_name, idx)
823 if os.path.islink(link_name):
827 logging.exception("Can't remove symlink '%s'", link_name)
830 def _GatherAndLinkBlockDevs(instance):
831 """Set up an instance's block device(s).
833 This is run on the primary node at instance startup. The block
834 devices must be already assembled.
836 @type instance: L{objects.Instance}
837 @param instance: the instance whose disks we shoul assemble
839 @return: list of (disk_object, device_path)
843 for idx, disk in enumerate(instance.disks):
844 device = _RecursiveFindBD(disk)
846 raise errors.BlockDeviceError("Block device '%s' is not set up." %
850 link_name = _SymlinkBlockDev(instance.name, device.dev_path, idx)
852 raise errors.BlockDeviceError("Cannot create block device symlink: %s" %
855 block_devices.append((disk, link_name))
860 def StartInstance(instance, extra_args):
861 """Start an instance.
863 @type instance: L{objects.Instance}
864 @param instance: the instance object
866 @return: whether the startup was successful or not
869 running_instances = GetInstanceList([instance.hypervisor])
871 if instance.name in running_instances:
872 return (True, "Already running")
875 block_devices = _GatherAndLinkBlockDevs(instance)
876 hyper = hypervisor.GetHypervisor(instance.hypervisor)
877 hyper.StartInstance(instance, block_devices, extra_args)
878 except errors.BlockDeviceError, err:
879 logging.exception("Failed to start instance")
880 return (False, "Block device error: %s" % str(err))
881 except errors.HypervisorError, err:
882 logging.exception("Failed to start instance")
883 _RemoveBlockDevLinks(instance.name, instance.disks)
884 return (False, "Hypervisor error: %s" % str(err))
886 return (True, "Instance started successfully")
889 def ShutdownInstance(instance):
890 """Shut an instance down.
892 @note: this functions uses polling with a hardcoded timeout.
894 @type instance: L{objects.Instance}
895 @param instance: the instance object
897 @return: whether the startup was successful or not
900 hv_name = instance.hypervisor
901 running_instances = GetInstanceList([hv_name])
903 if instance.name not in running_instances:
906 hyper = hypervisor.GetHypervisor(hv_name)
908 hyper.StopInstance(instance)
909 except errors.HypervisorError, err:
910 logging.error("Failed to stop instance: %s" % 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 logging.exception("Failed to stop instance: %s" % err)
932 if instance.name in GetInstanceList([hv_name]):
933 logging.error("Could not shutdown instance '%s' even by destroy",
937 _RemoveBlockDevLinks(instance.name, instance.disks)
942 def InstanceReboot(instance, reboot_type, extra_args):
943 """Reboot an instance.
945 @type instance: L{objects.Instance}
946 @param instance: the instance object to reboot
947 @type reboot_type: str
948 @param reboot_type: the type of reboot, one the following
950 - L{constants.INSTANCE_REBOOT_SOFT}: only reboot the
951 instance OS, do not recreate the VM
952 - L{constants.INSTANCE_REBOOT_HARD}: tear down and
953 restart the VM (at the hypervisor level)
954 - the other reboot type (L{constants.INSTANCE_REBOOT_HARD})
955 is not accepted here, since that mode is handled
958 @return: the success of the operation
961 running_instances = GetInstanceList([instance.hypervisor])
963 if instance.name not in running_instances:
964 msg = "Cannot reboot instance %s that is not running" % instance.name
968 hyper = hypervisor.GetHypervisor(instance.hypervisor)
969 if reboot_type == constants.INSTANCE_REBOOT_SOFT:
971 hyper.RebootInstance(instance)
972 except errors.HypervisorError, err:
973 msg = "Failed to soft reboot instance %s: %s" % (instance.name, err)
976 elif reboot_type == constants.INSTANCE_REBOOT_HARD:
978 ShutdownInstance(instance)
979 StartInstance(instance, extra_args)
980 except errors.HypervisorError, err:
981 msg = "Failed to hard reboot instance %s: %s" % (instance.name, err)
985 return (False, "Invalid reboot_type received: %s" % (reboot_type,))
987 return (True, "Reboot successful")
990 def MigrationInfo(instance):
991 """Gather information about an instance to be migrated.
993 @type instance: L{objects.Instance}
994 @param instance: the instance definition
997 hyper = hypervisor.GetHypervisor(instance.hypervisor)
999 info = hyper.MigrationInfo(instance)
1000 except errors.HypervisorError, err:
1001 msg = "Failed to fetch migration information"
1002 logging.exception(msg)
1003 return (False, '%s: %s' % (msg, err))
1007 def AcceptInstance(instance, info, target):
1008 """Prepare the node to accept an instance.
1010 @type instance: L{objects.Instance}
1011 @param instance: the instance definition
1012 @type info: string/data (opaque)
1013 @param info: migration information, from the source node
1014 @type target: string
1015 @param target: target host (usually ip), on this node
1018 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1020 hyper.AcceptInstance(instance, info, target)
1021 except errors.HypervisorError, err:
1022 msg = "Failed to accept instance"
1023 logging.exception(msg)
1024 return (False, '%s: %s' % (msg, err))
1025 return (True, "Accept successfull")
1028 def FinalizeMigration(instance, info, success):
1029 """Finalize any preparation to accept an instance.
1031 @type instance: L{objects.Instance}
1032 @param instance: the instance definition
1033 @type info: string/data (opaque)
1034 @param info: migration information, from the source node
1035 @type success: boolean
1036 @param success: whether the migration was a success or a failure
1039 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1041 hyper.FinalizeMigration(instance, info, success)
1042 except errors.HypervisorError, err:
1043 msg = "Failed to finalize migration"
1044 logging.exception(msg)
1045 return (False, '%s: %s' % (msg, err))
1046 return (True, "Migration Finalized")
1049 def MigrateInstance(instance, target, live):
1050 """Migrates an instance to another node.
1052 @type instance: L{objects.Instance}
1053 @param instance: the instance definition
1054 @type target: string
1055 @param target: the target node name
1057 @param live: whether the migration should be done live or not (the
1058 interpretation of this parameter is left to the hypervisor)
1060 @return: a tuple of (success, msg) where:
1061 - succes is a boolean denoting the success/failure of the operation
1062 - msg is a string with details in case of failure
1065 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1068 hyper.MigrateInstance(instance.name, target, live)
1069 except errors.HypervisorError, err:
1070 msg = "Failed to migrate instance"
1071 logging.exception(msg)
1072 return (False, "%s: %s" % (msg, err))
1073 return (True, "Migration successfull")
1076 def BlockdevCreate(disk, size, owner, on_primary, info):
1077 """Creates a block device for an instance.
1079 @type disk: L{objects.Disk}
1080 @param disk: the object describing the disk we should create
1082 @param size: the size of the physical underlying device, in MiB
1084 @param owner: the name of the instance for which disk is created,
1085 used for device cache data
1086 @type on_primary: boolean
1087 @param on_primary: indicates if it is the primary node or not
1089 @param info: string that will be sent to the physical device
1090 creation, used for example to set (LVM) tags on LVs
1092 @return: the new unique_id of the device (this can sometime be
1093 computed only after creation), or None. On secondary nodes,
1094 it's not required to return anything.
1099 for child in disk.children:
1101 crdev = _RecursiveAssembleBD(child, owner, on_primary)
1102 except errors.BlockDeviceError, err:
1103 errmsg = "Can't assemble device %s: %s" % (child, err)
1104 logging.error(errmsg)
1105 return False, errmsg
1106 if on_primary or disk.AssembleOnSecondary():
1107 # we need the children open in case the device itself has to
1111 except errors.BlockDeviceError, err:
1112 errmsg = "Can't make child '%s' read-write: %s" % (child, err)
1113 logging.error(errmsg)
1114 return False, errmsg
1118 device = bdev.Create(disk.dev_type, disk.physical_id, clist, size)
1119 except errors.BlockDeviceError, err:
1120 return False, "Can't create block device: %s" % str(err)
1122 if on_primary or disk.AssembleOnSecondary():
1125 except errors.BlockDeviceError, err:
1126 errmsg = ("Can't assemble device after creation, very"
1127 " unusual event: %s" % str(err))
1128 logging.error(errmsg)
1129 return False, errmsg
1130 device.SetSyncSpeed(constants.SYNC_SPEED)
1131 if on_primary or disk.OpenOnSecondary():
1133 device.Open(force=True)
1134 except errors.BlockDeviceError, err:
1135 errmsg = ("Can't make device r/w after creation, very"
1136 " unusual event: %s" % str(err))
1137 logging.error(errmsg)
1138 return False, errmsg
1139 DevCacheManager.UpdateCache(device.dev_path, owner,
1140 on_primary, disk.iv_name)
1142 device.SetInfo(info)
1144 physical_id = device.unique_id
1145 return True, physical_id
1148 def BlockdevRemove(disk):
1149 """Remove a block device.
1151 @note: This is intended to be called recursively.
1153 @type disk: L{objects.Disk}
1154 @param disk: the disk object we should remove
1156 @return: the success of the operation
1162 rdev = _RecursiveFindBD(disk)
1163 except errors.BlockDeviceError, err:
1164 # probably can't attach
1165 logging.info("Can't attach to device %s in remove", disk)
1167 if rdev is not None:
1168 r_path = rdev.dev_path
1171 except errors.BlockDeviceError, err:
1172 msgs.append(str(err))
1175 DevCacheManager.RemoveCache(r_path)
1178 for child in disk.children:
1179 c_status, c_msg = BlockdevRemove(child)
1180 result = result and c_status
1181 if c_msg: # not an empty message
1184 return (result, "; ".join(msgs))
1187 def _RecursiveAssembleBD(disk, owner, as_primary):
1188 """Activate a block device for an instance.
1190 This is run on the primary and secondary nodes for an instance.
1192 @note: this function is called recursively.
1194 @type disk: L{objects.Disk}
1195 @param disk: the disk we try to assemble
1197 @param owner: the name of the instance which owns the disk
1198 @type as_primary: boolean
1199 @param as_primary: if we should make the block device
1202 @return: the assembled device or None (in case no device
1204 @raise errors.BlockDeviceError: in case there is an error
1205 during the activation of the children or the device
1211 mcn = disk.ChildrenNeeded()
1213 mcn = 0 # max number of Nones allowed
1215 mcn = len(disk.children) - mcn # max number of Nones
1216 for chld_disk in disk.children:
1218 cdev = _RecursiveAssembleBD(chld_disk, owner, as_primary)
1219 except errors.BlockDeviceError, err:
1220 if children.count(None) >= mcn:
1223 logging.error("Error in child activation (but continuing): %s",
1225 children.append(cdev)
1227 if as_primary or disk.AssembleOnSecondary():
1228 r_dev = bdev.Assemble(disk.dev_type, disk.physical_id, children)
1229 r_dev.SetSyncSpeed(constants.SYNC_SPEED)
1231 if as_primary or disk.OpenOnSecondary():
1233 DevCacheManager.UpdateCache(r_dev.dev_path, owner,
1234 as_primary, disk.iv_name)
1241 def BlockdevAssemble(disk, owner, as_primary):
1242 """Activate a block device for an instance.
1244 This is a wrapper over _RecursiveAssembleBD.
1246 @rtype: str or boolean
1247 @return: a C{/dev/...} path for primary nodes, and
1248 C{True} for secondary nodes
1252 result = "no error information"
1254 result = _RecursiveAssembleBD(disk, owner, as_primary)
1255 if isinstance(result, bdev.BlockDev):
1256 result = result.dev_path
1257 except errors.BlockDeviceError, err:
1258 result = "Error while assembling disk: %s" % str(err)
1260 return (status, result)
1263 def BlockdevShutdown(disk):
1264 """Shut down a block device.
1266 First, if the device is assembled (Attach() is successfull), then
1267 the device is shutdown. Then the children of the device are
1270 This function is called recursively. Note that we don't cache the
1271 children or such, as oppossed to assemble, shutdown of different
1272 devices doesn't require that the upper device was active.
1274 @type disk: L{objects.Disk}
1275 @param disk: the description of the disk we should
1278 @return: the success of the operation
1283 r_dev = _RecursiveFindBD(disk)
1284 if r_dev is not None:
1285 r_path = r_dev.dev_path
1288 DevCacheManager.RemoveCache(r_path)
1289 except errors.BlockDeviceError, err:
1290 msgs.append(str(err))
1294 for child in disk.children:
1295 c_status, c_msg = BlockdevShutdown(child)
1296 result = result and c_status
1297 if c_msg: # not an empty message
1300 return (result, "; ".join(msgs))
1303 def BlockdevAddchildren(parent_cdev, new_cdevs):
1304 """Extend a mirrored block device.
1306 @type parent_cdev: L{objects.Disk}
1307 @param parent_cdev: the disk to which we should add children
1308 @type new_cdevs: list of L{objects.Disk}
1309 @param new_cdevs: the list of children which we should add
1311 @return: the success of the operation
1314 parent_bdev = _RecursiveFindBD(parent_cdev)
1315 if parent_bdev is None:
1316 logging.error("Can't find parent device")
1318 new_bdevs = [_RecursiveFindBD(disk) for disk in new_cdevs]
1319 if new_bdevs.count(None) > 0:
1320 logging.error("Can't find new device(s) to add: %s:%s",
1321 new_bdevs, new_cdevs)
1323 parent_bdev.AddChildren(new_bdevs)
1327 def BlockdevRemovechildren(parent_cdev, new_cdevs):
1328 """Shrink a mirrored block device.
1330 @type parent_cdev: L{objects.Disk}
1331 @param parent_cdev: the disk from which we should remove children
1332 @type new_cdevs: list of L{objects.Disk}
1333 @param new_cdevs: the list of children which we should remove
1335 @return: the success of the operation
1338 parent_bdev = _RecursiveFindBD(parent_cdev)
1339 if parent_bdev is None:
1340 logging.error("Can't find parent in remove children: %s", parent_cdev)
1343 for disk in new_cdevs:
1344 rpath = disk.StaticDevPath()
1346 bd = _RecursiveFindBD(disk)
1348 logging.error("Can't find dynamic device %s while removing children",
1352 devs.append(bd.dev_path)
1355 parent_bdev.RemoveChildren(devs)
1359 def BlockdevGetmirrorstatus(disks):
1360 """Get the mirroring status of a list of devices.
1362 @type disks: list of L{objects.Disk}
1363 @param disks: the list of disks which we should query
1366 a list of (mirror_done, estimated_time) tuples, which
1367 are the result of L{bdev.BlockDev.CombinedSyncStatus}
1368 @raise errors.BlockDeviceError: if any of the disks cannot be
1374 rbd = _RecursiveFindBD(dsk)
1376 raise errors.BlockDeviceError("Can't find device %s" % str(dsk))
1377 stats.append(rbd.CombinedSyncStatus())
1381 def _RecursiveFindBD(disk):
1382 """Check if a device is activated.
1384 If so, return informations about the real device.
1386 @type disk: L{objects.Disk}
1387 @param disk: the disk object we need to find
1389 @return: None if the device can't be found,
1390 otherwise the device instance
1395 for chdisk in disk.children:
1396 children.append(_RecursiveFindBD(chdisk))
1398 return bdev.FindDevice(disk.dev_type, disk.physical_id, children)
1401 def BlockdevFind(disk):
1402 """Check if a device is activated.
1404 If it is, return informations about the real device.
1406 @type disk: L{objects.Disk}
1407 @param disk: the disk to find
1408 @rtype: None or tuple
1409 @return: None if the disk cannot be found, otherwise a
1410 tuple (device_path, major, minor, sync_percent,
1411 estimated_time, is_degraded)
1415 rbd = _RecursiveFindBD(disk)
1416 except errors.BlockDeviceError, err:
1417 return (False, str(err))
1420 return (True, (rbd.dev_path, rbd.major, rbd.minor) + rbd.GetSyncStatus())
1423 def UploadFile(file_name, data, mode, uid, gid, atime, mtime):
1424 """Write a file to the filesystem.
1426 This allows the master to overwrite(!) a file. It will only perform
1427 the operation if the file belongs to a list of configuration files.
1429 @type file_name: str
1430 @param file_name: the target file name
1432 @param data: the new contents of the file
1434 @param mode: the mode to give the file (can be None)
1436 @param uid: the owner of the file (can be -1 for default)
1438 @param gid: the group of the file (can be -1 for default)
1440 @param atime: the atime to set on the file (can be None)
1442 @param mtime: the mtime to set on the file (can be None)
1444 @return: the success of the operation; errors are logged
1445 in the node daemon log
1448 if not os.path.isabs(file_name):
1449 logging.error("Filename passed to UploadFile is not absolute: '%s'",
1454 constants.CLUSTER_CONF_FILE,
1455 constants.ETC_HOSTS,
1456 constants.SSH_KNOWN_HOSTS_FILE,
1457 constants.VNC_PASSWORD_FILE,
1460 if file_name not in allowed_files:
1461 logging.error("Filename passed to UploadFile not in allowed"
1462 " upload targets: '%s'", file_name)
1465 raw_data = _Decompress(data)
1467 utils.WriteFile(file_name, data=raw_data, mode=mode, uid=uid, gid=gid,
1468 atime=atime, mtime=mtime)
1472 def WriteSsconfFiles(values):
1473 """Update all ssconf files.
1475 Wrapper around the SimpleStore.WriteFiles.
1478 ssconf.SimpleStore().WriteFiles(values)
1481 def _ErrnoOrStr(err):
1482 """Format an EnvironmentError exception.
1484 If the L{err} argument has an errno attribute, it will be looked up
1485 and converted into a textual C{E...} description. Otherwise the
1486 string representation of the error will be returned.
1488 @type err: L{EnvironmentError}
1489 @param err: the exception to format
1492 if hasattr(err, 'errno'):
1493 detail = errno.errorcode[err.errno]
1499 def _OSOndiskVersion(name, os_dir):
1500 """Compute and return the API version of a given OS.
1502 This function will try to read the API version of the OS given by
1503 the 'name' parameter and residing in the 'os_dir' directory.
1506 @param name: the OS name we should look for
1508 @param os_dir: the directory inwhich we should look for the OS
1511 Either an integer denoting the version or None in the
1512 case when this is not a valid OS name.
1513 @raise errors.InvalidOS: if the OS cannot be found
1516 api_file = os.path.sep.join([os_dir, "ganeti_api_version"])
1519 st = os.stat(api_file)
1520 except EnvironmentError, err:
1521 raise errors.InvalidOS(name, os_dir, "'ganeti_api_version' file not"
1522 " found (%s)" % _ErrnoOrStr(err))
1524 if not stat.S_ISREG(stat.S_IFMT(st.st_mode)):
1525 raise errors.InvalidOS(name, os_dir, "'ganeti_api_version' file is not"
1531 api_versions = f.readlines()
1534 except EnvironmentError, err:
1535 raise errors.InvalidOS(name, os_dir, "error while reading the"
1536 " API version (%s)" % _ErrnoOrStr(err))
1538 api_versions = [version.strip() for version in api_versions]
1540 api_versions = [int(version) for version in api_versions]
1541 except (TypeError, ValueError), err:
1542 raise errors.InvalidOS(name, os_dir,
1543 "API version is not integer (%s)" % str(err))
1548 def DiagnoseOS(top_dirs=None):
1549 """Compute the validity for all OSes.
1551 @type top_dirs: list
1552 @param top_dirs: the list of directories in which to
1553 search (if not given defaults to
1554 L{constants.OS_SEARCH_PATH})
1555 @rtype: list of L{objects.OS}
1556 @return: an OS object for each name in all the given
1560 if top_dirs is None:
1561 top_dirs = constants.OS_SEARCH_PATH
1564 for dir_name in top_dirs:
1565 if os.path.isdir(dir_name):
1567 f_names = utils.ListVisibleFiles(dir_name)
1568 except EnvironmentError, err:
1569 logging.exception("Can't list the OS directory %s", dir_name)
1571 for name in f_names:
1573 os_inst = OSFromDisk(name, base_dir=dir_name)
1574 result.append(os_inst)
1575 except errors.InvalidOS, err:
1576 result.append(objects.OS.FromInvalidOS(err))
1581 def OSFromDisk(name, base_dir=None):
1582 """Create an OS instance from disk.
1584 This function will return an OS instance if the given name is a
1585 valid OS name. Otherwise, it will raise an appropriate
1586 L{errors.InvalidOS} exception, detailing why this is not a valid OS.
1588 @type base_dir: string
1589 @keyword base_dir: Base directory containing OS installations.
1590 Defaults to a search in all the OS_SEARCH_PATH dirs.
1591 @rtype: L{objects.OS}
1592 @return: the OS instance if we find a valid one
1593 @raise errors.InvalidOS: if we don't find a valid OS
1596 if base_dir is None:
1597 os_dir = utils.FindFile(name, constants.OS_SEARCH_PATH, os.path.isdir)
1599 raise errors.InvalidOS(name, None, "OS dir not found in search path")
1601 os_dir = os.path.sep.join([base_dir, name])
1603 api_versions = _OSOndiskVersion(name, os_dir)
1605 if constants.OS_API_VERSION not in api_versions:
1606 raise errors.InvalidOS(name, os_dir, "API version mismatch"
1607 " (found %s want %s)"
1608 % (api_versions, constants.OS_API_VERSION))
1610 # OS Scripts dictionary, we will populate it with the actual script names
1611 os_scripts = dict.fromkeys(constants.OS_SCRIPTS)
1613 for script in os_scripts:
1614 os_scripts[script] = os.path.sep.join([os_dir, script])
1617 st = os.stat(os_scripts[script])
1618 except EnvironmentError, err:
1619 raise errors.InvalidOS(name, os_dir, "'%s' script missing (%s)" %
1620 (script, _ErrnoOrStr(err)))
1622 if stat.S_IMODE(st.st_mode) & stat.S_IXUSR != stat.S_IXUSR:
1623 raise errors.InvalidOS(name, os_dir, "'%s' script not executable" %
1626 if not stat.S_ISREG(stat.S_IFMT(st.st_mode)):
1627 raise errors.InvalidOS(name, os_dir, "'%s' is not a regular file" %
1631 return objects.OS(name=name, path=os_dir, status=constants.OS_VALID_STATUS,
1632 create_script=os_scripts[constants.OS_SCRIPT_CREATE],
1633 export_script=os_scripts[constants.OS_SCRIPT_EXPORT],
1634 import_script=os_scripts[constants.OS_SCRIPT_IMPORT],
1635 rename_script=os_scripts[constants.OS_SCRIPT_RENAME],
1636 api_versions=api_versions)
1638 def OSEnvironment(instance, debug=0):
1639 """Calculate the environment for an os script.
1641 @type instance: L{objects.Instance}
1642 @param instance: target instance for the os script run
1643 @type debug: integer
1644 @param debug: debug level (0 or 1, for OS Api 10)
1646 @return: dict of environment variables
1647 @raise errors.BlockDeviceError: if the block device
1652 result['OS_API_VERSION'] = '%d' % constants.OS_API_VERSION
1653 result['INSTANCE_NAME'] = instance.name
1654 result['INSTANCE_OS'] = instance.os
1655 result['HYPERVISOR'] = instance.hypervisor
1656 result['DISK_COUNT'] = '%d' % len(instance.disks)
1657 result['NIC_COUNT'] = '%d' % len(instance.nics)
1658 result['DEBUG_LEVEL'] = '%d' % debug
1659 for idx, disk in enumerate(instance.disks):
1660 real_disk = _RecursiveFindBD(disk)
1661 if real_disk is None:
1662 raise errors.BlockDeviceError("Block device '%s' is not set up" %
1665 result['DISK_%d_PATH' % idx] = real_disk.dev_path
1666 # FIXME: When disks will have read-only mode, populate this
1667 result['DISK_%d_ACCESS' % idx] = disk.mode
1668 if constants.HV_DISK_TYPE in instance.hvparams:
1669 result['DISK_%d_FRONTEND_TYPE' % idx] = \
1670 instance.hvparams[constants.HV_DISK_TYPE]
1671 if disk.dev_type in constants.LDS_BLOCK:
1672 result['DISK_%d_BACKEND_TYPE' % idx] = 'block'
1673 elif disk.dev_type == constants.LD_FILE:
1674 result['DISK_%d_BACKEND_TYPE' % idx] = \
1675 'file:%s' % disk.physical_id[0]
1676 for idx, nic in enumerate(instance.nics):
1677 result['NIC_%d_MAC' % idx] = nic.mac
1679 result['NIC_%d_IP' % idx] = nic.ip
1680 result['NIC_%d_BRIDGE' % idx] = nic.bridge
1681 if constants.HV_NIC_TYPE in instance.hvparams:
1682 result['NIC_%d_FRONTEND_TYPE' % idx] = \
1683 instance.hvparams[constants.HV_NIC_TYPE]
1687 def BlockdevGrow(disk, amount):
1688 """Grow a stack of block devices.
1690 This function is called recursively, with the childrens being the
1691 first ones to resize.
1693 @type disk: L{objects.Disk}
1694 @param disk: the disk to be grown
1695 @rtype: (status, result)
1696 @return: a tuple with the status of the operation
1697 (True/False), and the errors message if status
1701 r_dev = _RecursiveFindBD(disk)
1703 return False, "Cannot find block device %s" % (disk,)
1707 except errors.BlockDeviceError, err:
1708 return False, str(err)
1713 def BlockdevSnapshot(disk):
1714 """Create a snapshot copy of a block device.
1716 This function is called recursively, and the snapshot is actually created
1717 just for the leaf lvm backend device.
1719 @type disk: L{objects.Disk}
1720 @param disk: the disk to be snapshotted
1722 @return: snapshot disk path
1726 if len(disk.children) == 1:
1727 # only one child, let's recurse on it
1728 return BlockdevSnapshot(disk.children[0])
1730 # more than one child, choose one that matches
1731 for child in disk.children:
1732 if child.size == disk.size:
1733 # return implies breaking the loop
1734 return BlockdevSnapshot(child)
1735 elif disk.dev_type == constants.LD_LV:
1736 r_dev = _RecursiveFindBD(disk)
1737 if r_dev is not None:
1738 # let's stay on the safe side and ask for the full size, for now
1739 return r_dev.Snapshot(disk.size)
1743 raise errors.ProgrammerError("Cannot snapshot non-lvm block device"
1744 " '%s' of type '%s'" %
1745 (disk.unique_id, disk.dev_type))
1748 def ExportSnapshot(disk, dest_node, instance, cluster_name, idx):
1749 """Export a block device snapshot to a remote node.
1751 @type disk: L{objects.Disk}
1752 @param disk: the description of the disk to export
1753 @type dest_node: str
1754 @param dest_node: the destination node to export to
1755 @type instance: L{objects.Instance}
1756 @param instance: the instance object to whom the disk belongs
1757 @type cluster_name: str
1758 @param cluster_name: the cluster name, needed for SSH hostalias
1760 @param idx: the index of the disk in the instance's disk list,
1761 used to export to the OS scripts environment
1763 @return: the success of the operation
1766 export_env = OSEnvironment(instance)
1768 inst_os = OSFromDisk(instance.os)
1769 export_script = inst_os.export_script
1771 logfile = "%s/exp-%s-%s-%s.log" % (constants.LOG_OS_DIR, inst_os.name,
1772 instance.name, int(time.time()))
1773 if not os.path.exists(constants.LOG_OS_DIR):
1774 os.mkdir(constants.LOG_OS_DIR, 0750)
1775 real_disk = _RecursiveFindBD(disk)
1776 if real_disk is None:
1777 raise errors.BlockDeviceError("Block device '%s' is not set up" %
1781 export_env['EXPORT_DEVICE'] = real_disk.dev_path
1782 export_env['EXPORT_INDEX'] = str(idx)
1784 destdir = os.path.join(constants.EXPORT_DIR, instance.name + ".new")
1785 destfile = disk.physical_id[1]
1787 # the target command is built out of three individual commands,
1788 # which are joined by pipes; we check each individual command for
1790 expcmd = utils.BuildShellCmd("cd %s; %s 2>%s", inst_os.path,
1791 export_script, logfile)
1795 destcmd = utils.BuildShellCmd("mkdir -p %s && cat > %s/%s",
1796 destdir, destdir, destfile)
1797 remotecmd = _GetSshRunner(cluster_name).BuildCmd(dest_node,
1798 constants.GANETI_RUNAS,
1801 # all commands have been checked, so we're safe to combine them
1802 command = '|'.join([expcmd, comprcmd, utils.ShellQuoteArgs(remotecmd)])
1804 result = utils.RunCmd(command, env=export_env)
1807 logging.error("os snapshot export command '%s' returned error: %s"
1808 " output: %s", command, result.fail_reason, result.output)
1814 def FinalizeExport(instance, snap_disks):
1815 """Write out the export configuration information.
1817 @type instance: L{objects.Instance}
1818 @param instance: the instance which we export, used for
1819 saving configuration
1820 @type snap_disks: list of L{objects.Disk}
1821 @param snap_disks: list of snapshot block devices, which
1822 will be used to get the actual name of the dump file
1825 @return: the success of the operation
1828 destdir = os.path.join(constants.EXPORT_DIR, instance.name + ".new")
1829 finaldestdir = os.path.join(constants.EXPORT_DIR, instance.name)
1831 config = objects.SerializableConfigParser()
1833 config.add_section(constants.INISECT_EXP)
1834 config.set(constants.INISECT_EXP, 'version', '0')
1835 config.set(constants.INISECT_EXP, 'timestamp', '%d' % int(time.time()))
1836 config.set(constants.INISECT_EXP, 'source', instance.primary_node)
1837 config.set(constants.INISECT_EXP, 'os', instance.os)
1838 config.set(constants.INISECT_EXP, 'compression', 'gzip')
1840 config.add_section(constants.INISECT_INS)
1841 config.set(constants.INISECT_INS, 'name', instance.name)
1842 config.set(constants.INISECT_INS, 'memory', '%d' %
1843 instance.beparams[constants.BE_MEMORY])
1844 config.set(constants.INISECT_INS, 'vcpus', '%d' %
1845 instance.beparams[constants.BE_VCPUS])
1846 config.set(constants.INISECT_INS, 'disk_template', instance.disk_template)
1849 for nic_count, nic in enumerate(instance.nics):
1851 config.set(constants.INISECT_INS, 'nic%d_mac' %
1852 nic_count, '%s' % nic.mac)
1853 config.set(constants.INISECT_INS, 'nic%d_ip' % nic_count, '%s' % nic.ip)
1854 config.set(constants.INISECT_INS, 'nic%d_bridge' % nic_count,
1856 # TODO: redundant: on load can read nics until it doesn't exist
1857 config.set(constants.INISECT_INS, 'nic_count' , '%d' % nic_total)
1860 for disk_count, disk in enumerate(snap_disks):
1863 config.set(constants.INISECT_INS, 'disk%d_ivname' % disk_count,
1864 ('%s' % disk.iv_name))
1865 config.set(constants.INISECT_INS, 'disk%d_dump' % disk_count,
1866 ('%s' % disk.physical_id[1]))
1867 config.set(constants.INISECT_INS, 'disk%d_size' % disk_count,
1870 config.set(constants.INISECT_INS, 'disk_count' , '%d' % disk_total)
1872 utils.WriteFile(os.path.join(destdir, constants.EXPORT_CONF_FILE),
1873 data=config.Dumps())
1874 shutil.rmtree(finaldestdir, True)
1875 shutil.move(destdir, finaldestdir)
1880 def ExportInfo(dest):
1881 """Get export configuration information.
1884 @param dest: directory containing the export
1886 @rtype: L{objects.SerializableConfigParser}
1887 @return: a serializable config file containing the
1891 cff = os.path.join(dest, constants.EXPORT_CONF_FILE)
1893 config = objects.SerializableConfigParser()
1896 if (not config.has_section(constants.INISECT_EXP) or
1897 not config.has_section(constants.INISECT_INS)):
1903 def ImportOSIntoInstance(instance, src_node, src_images, cluster_name):
1904 """Import an os image into an instance.
1906 @type instance: L{objects.Instance}
1907 @param instance: instance to import the disks into
1908 @type src_node: string
1909 @param src_node: source node for the disk images
1910 @type src_images: list of string
1911 @param src_images: absolute paths of the disk images
1912 @rtype: list of boolean
1913 @return: each boolean represent the success of importing the n-th disk
1916 import_env = OSEnvironment(instance)
1917 inst_os = OSFromDisk(instance.os)
1918 import_script = inst_os.import_script
1920 logfile = "%s/import-%s-%s-%s.log" % (constants.LOG_OS_DIR, instance.os,
1921 instance.name, int(time.time()))
1922 if not os.path.exists(constants.LOG_OS_DIR):
1923 os.mkdir(constants.LOG_OS_DIR, 0750)
1926 impcmd = utils.BuildShellCmd("(cd %s; %s >%s 2>&1)", inst_os.path,
1927 import_script, logfile)
1930 for idx, image in enumerate(src_images):
1932 destcmd = utils.BuildShellCmd('cat %s', image)
1933 remotecmd = _GetSshRunner(cluster_name).BuildCmd(src_node,
1934 constants.GANETI_RUNAS,
1936 command = '|'.join([utils.ShellQuoteArgs(remotecmd), comprcmd, impcmd])
1937 import_env['IMPORT_DEVICE'] = import_env['DISK_%d_PATH' % idx]
1938 import_env['IMPORT_INDEX'] = str(idx)
1939 result = utils.RunCmd(command, env=import_env)
1941 logging.error("Disk import command '%s' returned error: %s"
1942 " output: %s", command, result.fail_reason,
1944 final_result.append(False)
1946 final_result.append(True)
1948 final_result.append(True)
1954 """Return a list of exports currently available on this machine.
1957 @return: list of the exports
1960 if os.path.isdir(constants.EXPORT_DIR):
1961 return utils.ListVisibleFiles(constants.EXPORT_DIR)
1966 def RemoveExport(export):
1967 """Remove an existing export from the node.
1970 @param export: the name of the export to remove
1972 @return: the success of the operation
1975 target = os.path.join(constants.EXPORT_DIR, export)
1977 shutil.rmtree(target)
1978 # TODO: catch some of the relevant exceptions and provide a pretty
1979 # error message if rmtree fails.
1984 def BlockdevRename(devlist):
1985 """Rename a list of block devices.
1987 @type devlist: list of tuples
1988 @param devlist: list of tuples of the form (disk,
1989 new_logical_id, new_physical_id); disk is an
1990 L{objects.Disk} object describing the current disk,
1991 and new logical_id/physical_id is the name we
1994 @return: True if all renames succeeded, False otherwise
1998 for disk, unique_id in devlist:
1999 dev = _RecursiveFindBD(disk)
2004 old_rpath = dev.dev_path
2005 dev.Rename(unique_id)
2006 new_rpath = dev.dev_path
2007 if old_rpath != new_rpath:
2008 DevCacheManager.RemoveCache(old_rpath)
2009 # FIXME: we should add the new cache information here, like:
2010 # DevCacheManager.UpdateCache(new_rpath, owner, ...)
2011 # but we don't have the owner here - maybe parse from existing
2012 # cache? for now, we only lose lvm data when we rename, which
2013 # is less critical than DRBD or MD
2014 except errors.BlockDeviceError, err:
2015 logging.exception("Can't rename device '%s' to '%s'", dev, unique_id)
2020 def _TransformFileStorageDir(file_storage_dir):
2021 """Checks whether given file_storage_dir is valid.
2023 Checks wheter the given file_storage_dir is within the cluster-wide
2024 default file_storage_dir stored in SimpleStore. Only paths under that
2025 directory are allowed.
2027 @type file_storage_dir: str
2028 @param file_storage_dir: the path to check
2030 @return: the normalized path if valid, None otherwise
2034 file_storage_dir = os.path.normpath(file_storage_dir)
2035 base_file_storage_dir = cfg.GetFileStorageDir()
2036 if (not os.path.commonprefix([file_storage_dir, base_file_storage_dir]) ==
2037 base_file_storage_dir):
2038 logging.error("file storage directory '%s' is not under base file"
2039 " storage directory '%s'",
2040 file_storage_dir, base_file_storage_dir)
2042 return file_storage_dir
2045 def CreateFileStorageDir(file_storage_dir):
2046 """Create file storage directory.
2048 @type file_storage_dir: str
2049 @param file_storage_dir: directory to create
2052 @return: tuple with first element a boolean indicating wheter dir
2053 creation was successful or not
2056 file_storage_dir = _TransformFileStorageDir(file_storage_dir)
2058 if not file_storage_dir:
2061 if os.path.exists(file_storage_dir):
2062 if not os.path.isdir(file_storage_dir):
2063 logging.error("'%s' is not a directory", file_storage_dir)
2067 os.makedirs(file_storage_dir, 0750)
2068 except OSError, err:
2069 logging.error("Cannot create file storage directory '%s': %s",
2070 file_storage_dir, err)
2075 def RemoveFileStorageDir(file_storage_dir):
2076 """Remove file storage directory.
2078 Remove it only if it's empty. If not log an error and return.
2080 @type file_storage_dir: str
2081 @param file_storage_dir: the directory we should cleanup
2082 @rtype: tuple (success,)
2083 @return: tuple of one element, C{success}, denoting
2084 whether the operation was successfull
2087 file_storage_dir = _TransformFileStorageDir(file_storage_dir)
2089 if not file_storage_dir:
2092 if os.path.exists(file_storage_dir):
2093 if not os.path.isdir(file_storage_dir):
2094 logging.error("'%s' is not a directory", file_storage_dir)
2096 # deletes dir only if empty, otherwise we want to return False
2098 os.rmdir(file_storage_dir)
2099 except OSError, err:
2100 logging.exception("Cannot remove file storage directory '%s'",
2106 def RenameFileStorageDir(old_file_storage_dir, new_file_storage_dir):
2107 """Rename the file storage directory.
2109 @type old_file_storage_dir: str
2110 @param old_file_storage_dir: the current path
2111 @type new_file_storage_dir: str
2112 @param new_file_storage_dir: the name we should rename to
2113 @rtype: tuple (success,)
2114 @return: tuple of one element, C{success}, denoting
2115 whether the operation was successful
2118 old_file_storage_dir = _TransformFileStorageDir(old_file_storage_dir)
2119 new_file_storage_dir = _TransformFileStorageDir(new_file_storage_dir)
2121 if not old_file_storage_dir or not new_file_storage_dir:
2124 if not os.path.exists(new_file_storage_dir):
2125 if os.path.isdir(old_file_storage_dir):
2127 os.rename(old_file_storage_dir, new_file_storage_dir)
2128 except OSError, err:
2129 logging.exception("Cannot rename '%s' to '%s'",
2130 old_file_storage_dir, new_file_storage_dir)
2133 logging.error("'%s' is not a directory", old_file_storage_dir)
2136 if os.path.exists(old_file_storage_dir):
2137 logging.error("Cannot rename '%s' to '%s'. Both locations exist.",
2138 old_file_storage_dir, new_file_storage_dir)
2143 def _IsJobQueueFile(file_name):
2144 """Checks whether the given filename is in the queue directory.
2146 @type file_name: str
2147 @param file_name: the file name we should check
2149 @return: whether the file is under the queue directory
2152 queue_dir = os.path.normpath(constants.QUEUE_DIR)
2153 result = (os.path.commonprefix([queue_dir, file_name]) == queue_dir)
2156 logging.error("'%s' is not a file in the queue directory",
2162 def JobQueueUpdate(file_name, content):
2163 """Updates a file in the queue directory.
2165 This is just a wrapper over L{utils.WriteFile}, with proper
2168 @type file_name: str
2169 @param file_name: the job file name
2171 @param content: the new job contents
2173 @return: the success of the operation
2176 if not _IsJobQueueFile(file_name):
2179 # Write and replace the file atomically
2180 utils.WriteFile(file_name, data=_Decompress(content))
2185 def JobQueueRename(old, new):
2186 """Renames a job queue file.
2188 This is just a wrapper over os.rename with proper checking.
2191 @param old: the old (actual) file name
2193 @param new: the desired file name
2195 @return: the success of the operation
2198 if not (_IsJobQueueFile(old) and _IsJobQueueFile(new)):
2201 utils.RenameFile(old, new, mkdir=True)
2206 def JobQueueSetDrainFlag(drain_flag):
2207 """Set the drain flag for the queue.
2209 This will set or unset the queue drain flag.
2211 @type drain_flag: boolean
2212 @param drain_flag: if True, will set the drain flag, otherwise reset it.
2214 @return: always True
2215 @warning: the function always returns True
2219 utils.WriteFile(constants.JOB_QUEUE_DRAIN_FILE, data="", close=True)
2221 utils.RemoveFile(constants.JOB_QUEUE_DRAIN_FILE)
2226 def BlockdevClose(instance_name, disks):
2227 """Closes the given block devices.
2229 This means they will be switched to secondary mode (in case of
2232 @param instance_name: if the argument is not empty, the symlinks
2233 of this instance will be removed
2234 @type disks: list of L{objects.Disk}
2235 @param disks: the list of disks to be closed
2236 @rtype: tuple (success, message)
2237 @return: a tuple of success and message, where success
2238 indicates the succes of the operation, and message
2239 which will contain the error details in case we
2245 rd = _RecursiveFindBD(cf)
2247 return (False, "Can't find device %s" % cf)
2254 except errors.BlockDeviceError, err:
2255 msg.append(str(err))
2257 return (False, "Can't make devices secondary: %s" % ",".join(msg))
2260 _RemoveBlockDevLinks(instance_name, disks)
2261 return (True, "All devices secondary")
2264 def ValidateHVParams(hvname, hvparams):
2265 """Validates the given hypervisor parameters.
2267 @type hvname: string
2268 @param hvname: the hypervisor name
2269 @type hvparams: dict
2270 @param hvparams: the hypervisor parameters to be validated
2271 @rtype: tuple (success, message)
2272 @return: a tuple of success and message, where success
2273 indicates the succes of the operation, and message
2274 which will contain the error details in case we
2279 hv_type = hypervisor.GetHypervisor(hvname)
2280 hv_type.ValidateParameters(hvparams)
2281 return (True, "Validation passed")
2282 except errors.HypervisorError, err:
2283 return (False, str(err))
2287 """Demotes the current node from master candidate role.
2290 # try to ensure we're not the master by mistake
2291 master, myself = ssconf.GetMasterAndMyself()
2292 if master == myself:
2293 return (False, "ssconf status shows I'm the master node, will not demote")
2294 pid_file = utils.DaemonPidFileName(constants.MASTERD_PID)
2295 if utils.IsProcessAlive(utils.ReadPidFile(pid_file)):
2296 return (False, "The master daemon is running, will not demote")
2298 utils.CreateBackup(constants.CLUSTER_CONF_FILE)
2299 except EnvironmentError, err:
2300 if err.errno != errno.ENOENT:
2301 return (False, "Error while backing up cluster file: %s" % str(err))
2302 utils.RemoveFile(constants.CLUSTER_CONF_FILE)
2303 return (True, "Done")
2306 def _FindDisks(nodes_ip, disks):
2307 """Sets the physical ID on disks and returns the block devices.
2310 # set the correct physical ID
2311 my_name = utils.HostInfo().name
2313 cf.SetPhysicalID(my_name, nodes_ip)
2318 rd = _RecursiveFindBD(cf)
2320 return (False, "Can't find device %s" % cf)
2322 return (True, bdevs)
2325 def DrbdDisconnectNet(nodes_ip, disks):
2326 """Disconnects the network on a list of drbd devices.
2329 status, bdevs = _FindDisks(nodes_ip, disks)
2331 return status, bdevs
2337 except errors.BlockDeviceError, err:
2338 logging.exception("Failed to go into standalone mode")
2339 return (False, "Can't change network configuration: %s" % str(err))
2340 return (True, "All disks are now disconnected")
2343 def DrbdAttachNet(nodes_ip, disks, instance_name, multimaster):
2344 """Attaches the network on a list of drbd devices.
2347 status, bdevs = _FindDisks(nodes_ip, disks)
2349 return status, bdevs
2352 for idx, rd in enumerate(bdevs):
2354 _SymlinkBlockDev(instance_name, rd.dev_path, idx)
2355 except EnvironmentError, err:
2356 return (False, "Can't create symlink: %s" % str(err))
2357 # reconnect disks, switch to new master configuration and if
2358 # needed primary mode
2361 rd.AttachNet(multimaster)
2362 except errors.BlockDeviceError, err:
2363 return (False, "Can't change network configuration: %s" % str(err))
2364 # wait until the disks are connected; we need to retry the re-attach
2365 # if the device becomes standalone, as this might happen if the one
2366 # node disconnects and reconnects in a different mode before the
2367 # other node reconnects; in this case, one or both of the nodes will
2368 # decide it has wrong configuration and switch to standalone
2369 RECONNECT_TIMEOUT = 2 * 60
2370 sleep_time = 0.100 # start with 100 miliseconds
2371 timeout_limit = time.time() + RECONNECT_TIMEOUT
2372 while time.time() < timeout_limit:
2373 all_connected = True
2375 stats = rd.GetProcStatus()
2376 if not (stats.is_connected or stats.is_in_resync):
2377 all_connected = False
2378 if stats.is_standalone:
2379 # peer had different config info and this node became
2380 # standalone, even though this should not happen with the
2381 # new staged way of changing disk configs
2383 rd.ReAttachNet(multimaster)
2384 except errors.BlockDeviceError, err:
2385 return (False, "Can't change network configuration: %s" % str(err))
2388 time.sleep(sleep_time)
2389 sleep_time = min(5, sleep_time * 1.5)
2390 if not all_connected:
2391 return (False, "Timeout in disk reconnecting")
2393 # change to primary mode
2397 except errors.BlockDeviceError, err:
2398 return (False, "Can't change to primary mode: %s" % str(err))
2400 msg = "multi-master and primary"
2402 msg = "single-master"
2403 return (True, "Disks are now configured as %s" % msg)
2406 def DrbdWaitSync(nodes_ip, disks):
2407 """Wait until DRBDs have synchronized.
2410 status, bdevs = _FindDisks(nodes_ip, disks)
2412 return status, bdevs
2418 stats = rd.GetProcStatus()
2419 if not (stats.is_connected or stats.is_in_resync):
2422 alldone = alldone and (not stats.is_in_resync)
2423 if stats.sync_percent is not None:
2424 min_resync = min(min_resync, stats.sync_percent)
2425 return (not failure, (alldone, min_resync))
2428 class HooksRunner(object):
2431 This class is instantiated on the node side (ganeti-noded) and not
2435 RE_MASK = re.compile("^[a-zA-Z0-9_-]+$")
2437 def __init__(self, hooks_base_dir=None):
2438 """Constructor for hooks runner.
2440 @type hooks_base_dir: str or None
2441 @param hooks_base_dir: if not None, this overrides the
2442 L{constants.HOOKS_BASE_DIR} (useful for unittests)
2445 if hooks_base_dir is None:
2446 hooks_base_dir = constants.HOOKS_BASE_DIR
2447 self._BASE_DIR = hooks_base_dir
2450 def ExecHook(script, env):
2451 """Exec one hook script.
2454 @param script: the full path to the script
2456 @param env: the environment with which to exec the script
2457 @rtype: tuple (success, message)
2458 @return: a tuple of success and message, where success
2459 indicates the succes of the operation, and message
2460 which will contain the error details in case we
2464 # exec the process using subprocess and log the output
2467 fdstdin = open("/dev/null", "r")
2468 child = subprocess.Popen([script], stdin=fdstdin, stdout=subprocess.PIPE,
2469 stderr=subprocess.STDOUT, close_fds=True,
2470 shell=False, cwd="/", env=env)
2473 output = child.stdout.read(4096)
2474 child.stdout.close()
2475 except EnvironmentError, err:
2476 output += "Hook script error: %s" % str(err)
2480 result = child.wait()
2482 except EnvironmentError, err:
2483 if err.errno == errno.EINTR:
2487 # try not to leak fds
2488 for fd in (fdstdin, ):
2492 except EnvironmentError, err:
2493 # just log the error
2494 #logging.exception("Error while closing fd %s", fd)
2497 return result == 0, utils.SafeEncode(output.strip())
2499 def RunHooks(self, hpath, phase, env):
2500 """Run the scripts in the hooks directory.
2503 @param hpath: the path to the hooks directory which
2506 @param phase: either L{constants.HOOKS_PHASE_PRE} or
2507 L{constants.HOOKS_PHASE_POST}
2509 @param env: dictionary with the environment for the hook
2511 @return: list of 3-element tuples:
2513 - script result, either L{constants.HKR_SUCCESS} or
2514 L{constants.HKR_FAIL}
2515 - output of the script
2517 @raise errors.ProgrammerError: for invalid input
2521 if phase == constants.HOOKS_PHASE_PRE:
2523 elif phase == constants.HOOKS_PHASE_POST:
2526 raise errors.ProgrammerError("Unknown hooks phase: '%s'" % phase)
2529 subdir = "%s-%s.d" % (hpath, suffix)
2530 dir_name = "%s/%s" % (self._BASE_DIR, subdir)
2532 dir_contents = utils.ListVisibleFiles(dir_name)
2533 except OSError, err:
2534 # FIXME: must log output in case of failures
2537 # we use the standard python sort order,
2538 # so 00name is the recommended naming scheme
2540 for relname in dir_contents:
2541 fname = os.path.join(dir_name, relname)
2542 if not (os.path.isfile(fname) and os.access(fname, os.X_OK) and
2543 self.RE_MASK.match(relname) is not None):
2544 rrval = constants.HKR_SKIP
2547 result, output = self.ExecHook(fname, env)
2549 rrval = constants.HKR_FAIL
2551 rrval = constants.HKR_SUCCESS
2552 rr.append(("%s/%s" % (subdir, relname), rrval, output))
2557 class IAllocatorRunner(object):
2558 """IAllocator runner.
2560 This class is instantiated on the node side (ganeti-noded) and not on
2564 def Run(self, name, idata):
2565 """Run an iallocator script.
2568 @param name: the iallocator script name
2570 @param idata: the allocator input data
2573 @return: four element tuple of:
2574 - run status (one of the IARUN_ constants)
2577 - fail reason (as from L{utils.RunResult})
2580 alloc_script = utils.FindFile(name, constants.IALLOCATOR_SEARCH_PATH,
2582 if alloc_script is None:
2583 return (constants.IARUN_NOTFOUND, None, None, None)
2585 fd, fin_name = tempfile.mkstemp(prefix="ganeti-iallocator.")
2589 result = utils.RunCmd([alloc_script, fin_name])
2591 return (constants.IARUN_FAILURE, result.stdout, result.stderr,
2596 return (constants.IARUN_SUCCESS, result.stdout, result.stderr, None)
2599 class DevCacheManager(object):
2600 """Simple class for managing a cache of block device information.
2603 _DEV_PREFIX = "/dev/"
2604 _ROOT_DIR = constants.BDEV_CACHE_DIR
2607 def _ConvertPath(cls, dev_path):
2608 """Converts a /dev/name path to the cache file name.
2610 This replaces slashes with underscores and strips the /dev
2611 prefix. It then returns the full path to the cache file.
2614 @param dev_path: the C{/dev/} path name
2616 @return: the converted path name
2619 if dev_path.startswith(cls._DEV_PREFIX):
2620 dev_path = dev_path[len(cls._DEV_PREFIX):]
2621 dev_path = dev_path.replace("/", "_")
2622 fpath = "%s/bdev_%s" % (cls._ROOT_DIR, dev_path)
2626 def UpdateCache(cls, dev_path, owner, on_primary, iv_name):
2627 """Updates the cache information for a given device.
2630 @param dev_path: the pathname of the device
2632 @param owner: the owner (instance name) of the device
2633 @type on_primary: bool
2634 @param on_primary: whether this is the primary
2637 @param iv_name: the instance-visible name of the
2638 device, as in objects.Disk.iv_name
2643 if dev_path is None:
2644 logging.error("DevCacheManager.UpdateCache got a None dev_path")
2646 fpath = cls._ConvertPath(dev_path)
2652 iv_name = "not_visible"
2653 fdata = "%s %s %s\n" % (str(owner), state, iv_name)
2655 utils.WriteFile(fpath, data=fdata)
2656 except EnvironmentError, err:
2657 logging.exception("Can't update bdev cache for %s", dev_path)
2660 def RemoveCache(cls, dev_path):
2661 """Remove data for a dev_path.
2663 This is just a wrapper over L{utils.RemoveFile} with a converted
2664 path name and logging.
2667 @param dev_path: the pathname of the device
2672 if dev_path is None:
2673 logging.error("DevCacheManager.RemoveCache got a None dev_path")
2675 fpath = cls._ConvertPath(dev_path)
2677 utils.RemoveFile(fpath)
2678 except EnvironmentError, err:
2679 logging.exception("Can't update bdev cache for %s", dev_path)