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 RebootInstance(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 logging.error("Cannot reboot instance that is not running")
967 hyper = hypervisor.GetHypervisor(instance.hypervisor)
968 if reboot_type == constants.INSTANCE_REBOOT_SOFT:
970 hyper.RebootInstance(instance)
971 except errors.HypervisorError, err:
972 logging.exception("Failed to soft reboot instance")
974 elif reboot_type == constants.INSTANCE_REBOOT_HARD:
976 ShutdownInstance(instance)
977 StartInstance(instance, extra_args)
978 except errors.HypervisorError, err:
979 logging.exception("Failed to hard reboot instance")
982 raise errors.ParameterError("reboot_type invalid")
987 def MigrationInfo(instance):
988 """Gather information about an instance to be migrated.
990 @type instance: L{objects.Instance}
991 @param instance: the instance definition
994 hyper = hypervisor.GetHypervisor(instance.hypervisor)
996 info = hyper.MigrationInfo(instance)
997 except errors.HypervisorError, err:
998 msg = "Failed to fetch migration information"
999 logging.exception(msg)
1000 return (False, '%s: %s' % (msg, err))
1004 def AcceptInstance(instance, info, target):
1005 """Prepare the node to accept an instance.
1007 @type instance: L{objects.Instance}
1008 @param instance: the instance definition
1009 @type info: string/data (opaque)
1010 @param info: migration information, from the source node
1011 @type target: string
1012 @param target: target host (usually ip), on this node
1015 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1017 hyper.AcceptInstance(instance, info, target)
1018 except errors.HypervisorError, err:
1019 msg = "Failed to accept instance"
1020 logging.exception(msg)
1021 return (False, '%s: %s' % (msg, err))
1022 return (True, "Accept successfull")
1025 def FinalizeMigration(instance, info, success):
1026 """Finalize any preparation to accept an instance.
1028 @type instance: L{objects.Instance}
1029 @param instance: the instance definition
1030 @type info: string/data (opaque)
1031 @param info: migration information, from the source node
1032 @type success: boolean
1033 @param success: whether the migration was a success or a failure
1036 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1038 hyper.FinalizeMigration(instance, info, success)
1039 except errors.HypervisorError, err:
1040 msg = "Failed to finalize migration"
1041 logging.exception(msg)
1042 return (False, '%s: %s' % (msg, err))
1043 return (True, "Migration Finalized")
1046 def MigrateInstance(instance, target, live):
1047 """Migrates an instance to another node.
1049 @type instance: L{objects.Instance}
1050 @param instance: the instance definition
1051 @type target: string
1052 @param target: the target node name
1054 @param live: whether the migration should be done live or not (the
1055 interpretation of this parameter is left to the hypervisor)
1057 @return: a tuple of (success, msg) where:
1058 - succes is a boolean denoting the success/failure of the operation
1059 - msg is a string with details in case of failure
1062 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1065 hyper.MigrateInstance(instance.name, target, live)
1066 except errors.HypervisorError, err:
1067 msg = "Failed to migrate instance"
1068 logging.exception(msg)
1069 return (False, "%s: %s" % (msg, err))
1070 return (True, "Migration successfull")
1073 def BlockdevCreate(disk, size, owner, on_primary, info):
1074 """Creates a block device for an instance.
1076 @type disk: L{objects.Disk}
1077 @param disk: the object describing the disk we should create
1079 @param size: the size of the physical underlying device, in MiB
1081 @param owner: the name of the instance for which disk is created,
1082 used for device cache data
1083 @type on_primary: boolean
1084 @param on_primary: indicates if it is the primary node or not
1086 @param info: string that will be sent to the physical device
1087 creation, used for example to set (LVM) tags on LVs
1089 @return: the new unique_id of the device (this can sometime be
1090 computed only after creation), or None. On secondary nodes,
1091 it's not required to return anything.
1096 for child in disk.children:
1098 crdev = _RecursiveAssembleBD(child, owner, on_primary)
1099 except errors.BlockDeviceError, err:
1100 errmsg = "Can't assemble device %s: %s" % (child, err)
1101 logging.error(errmsg)
1102 return False, errmsg
1103 if on_primary or disk.AssembleOnSecondary():
1104 # we need the children open in case the device itself has to
1108 except errors.BlockDeviceError, err:
1109 errmsg = "Can't make child '%s' read-write: %s" % (child, err)
1110 logging.error(errmsg)
1111 return False, errmsg
1115 device = bdev.Create(disk.dev_type, disk.physical_id, clist, size)
1116 except errors.BlockDeviceError, err:
1117 return False, "Can't create block device: %s" % str(err)
1119 if on_primary or disk.AssembleOnSecondary():
1122 except errors.BlockDeviceError, err:
1123 errmsg = ("Can't assemble device after creation, very"
1124 " unusual event: %s" % str(err))
1125 logging.error(errmsg)
1126 return False, errmsg
1127 device.SetSyncSpeed(constants.SYNC_SPEED)
1128 if on_primary or disk.OpenOnSecondary():
1130 device.Open(force=True)
1131 except errors.BlockDeviceError, err:
1132 errmsg = ("Can't make device r/w after creation, very"
1133 " unusual event: %s" % str(err))
1134 logging.error(errmsg)
1135 return False, errmsg
1136 DevCacheManager.UpdateCache(device.dev_path, owner,
1137 on_primary, disk.iv_name)
1139 device.SetInfo(info)
1141 physical_id = device.unique_id
1142 return True, physical_id
1145 def BlockdevRemove(disk):
1146 """Remove a block device.
1148 @note: This is intended to be called recursively.
1150 @type disk: L{objects.Disk}
1151 @param disk: the disk object we should remove
1153 @return: the success of the operation
1159 rdev = _RecursiveFindBD(disk)
1160 except errors.BlockDeviceError, err:
1161 # probably can't attach
1162 logging.info("Can't attach to device %s in remove", disk)
1164 if rdev is not None:
1165 r_path = rdev.dev_path
1168 except errors.BlockDeviceError, err:
1169 msgs.append(str(err))
1172 DevCacheManager.RemoveCache(r_path)
1175 for child in disk.children:
1176 c_status, c_msg = BlockdevRemove(child)
1177 result = result and c_status
1178 if c_msg: # not an empty message
1181 return (result, "; ".join(msgs))
1184 def _RecursiveAssembleBD(disk, owner, as_primary):
1185 """Activate a block device for an instance.
1187 This is run on the primary and secondary nodes for an instance.
1189 @note: this function is called recursively.
1191 @type disk: L{objects.Disk}
1192 @param disk: the disk we try to assemble
1194 @param owner: the name of the instance which owns the disk
1195 @type as_primary: boolean
1196 @param as_primary: if we should make the block device
1199 @return: the assembled device or None (in case no device
1201 @raise errors.BlockDeviceError: in case there is an error
1202 during the activation of the children or the device
1208 mcn = disk.ChildrenNeeded()
1210 mcn = 0 # max number of Nones allowed
1212 mcn = len(disk.children) - mcn # max number of Nones
1213 for chld_disk in disk.children:
1215 cdev = _RecursiveAssembleBD(chld_disk, owner, as_primary)
1216 except errors.BlockDeviceError, err:
1217 if children.count(None) >= mcn:
1220 logging.error("Error in child activation (but continuing): %s",
1222 children.append(cdev)
1224 if as_primary or disk.AssembleOnSecondary():
1225 r_dev = bdev.Assemble(disk.dev_type, disk.physical_id, children)
1226 r_dev.SetSyncSpeed(constants.SYNC_SPEED)
1228 if as_primary or disk.OpenOnSecondary():
1230 DevCacheManager.UpdateCache(r_dev.dev_path, owner,
1231 as_primary, disk.iv_name)
1238 def BlockdevAssemble(disk, owner, as_primary):
1239 """Activate a block device for an instance.
1241 This is a wrapper over _RecursiveAssembleBD.
1243 @rtype: str or boolean
1244 @return: a C{/dev/...} path for primary nodes, and
1245 C{True} for secondary nodes
1249 result = "no error information"
1251 result = _RecursiveAssembleBD(disk, owner, as_primary)
1252 if isinstance(result, bdev.BlockDev):
1253 result = result.dev_path
1254 except errors.BlockDeviceError, err:
1255 result = "Error while assembling disk: %s" % str(err)
1257 return (status, result)
1260 def BlockdevShutdown(disk):
1261 """Shut down a block device.
1263 First, if the device is assembled (Attach() is successfull), then
1264 the device is shutdown. Then the children of the device are
1267 This function is called recursively. Note that we don't cache the
1268 children or such, as oppossed to assemble, shutdown of different
1269 devices doesn't require that the upper device was active.
1271 @type disk: L{objects.Disk}
1272 @param disk: the description of the disk we should
1275 @return: the success of the operation
1280 r_dev = _RecursiveFindBD(disk)
1281 if r_dev is not None:
1282 r_path = r_dev.dev_path
1285 DevCacheManager.RemoveCache(r_path)
1286 except errors.BlockDeviceError, err:
1287 msgs.append(str(err))
1291 for child in disk.children:
1292 c_status, c_msg = BlockdevShutdown(child)
1293 result = result and c_status
1294 if c_msg: # not an empty message
1297 return (result, "; ".join(msgs))
1300 def BlockdevAddchildren(parent_cdev, new_cdevs):
1301 """Extend a mirrored block device.
1303 @type parent_cdev: L{objects.Disk}
1304 @param parent_cdev: the disk to which we should add children
1305 @type new_cdevs: list of L{objects.Disk}
1306 @param new_cdevs: the list of children which we should add
1308 @return: the success of the operation
1311 parent_bdev = _RecursiveFindBD(parent_cdev)
1312 if parent_bdev is None:
1313 logging.error("Can't find parent device")
1315 new_bdevs = [_RecursiveFindBD(disk) for disk in new_cdevs]
1316 if new_bdevs.count(None) > 0:
1317 logging.error("Can't find new device(s) to add: %s:%s",
1318 new_bdevs, new_cdevs)
1320 parent_bdev.AddChildren(new_bdevs)
1324 def BlockdevRemovechildren(parent_cdev, new_cdevs):
1325 """Shrink a mirrored block device.
1327 @type parent_cdev: L{objects.Disk}
1328 @param parent_cdev: the disk from which we should remove children
1329 @type new_cdevs: list of L{objects.Disk}
1330 @param new_cdevs: the list of children which we should remove
1332 @return: the success of the operation
1335 parent_bdev = _RecursiveFindBD(parent_cdev)
1336 if parent_bdev is None:
1337 logging.error("Can't find parent in remove children: %s", parent_cdev)
1340 for disk in new_cdevs:
1341 rpath = disk.StaticDevPath()
1343 bd = _RecursiveFindBD(disk)
1345 logging.error("Can't find dynamic device %s while removing children",
1349 devs.append(bd.dev_path)
1352 parent_bdev.RemoveChildren(devs)
1356 def BlockdevGetmirrorstatus(disks):
1357 """Get the mirroring status of a list of devices.
1359 @type disks: list of L{objects.Disk}
1360 @param disks: the list of disks which we should query
1363 a list of (mirror_done, estimated_time) tuples, which
1364 are the result of L{bdev.BlockDev.CombinedSyncStatus}
1365 @raise errors.BlockDeviceError: if any of the disks cannot be
1371 rbd = _RecursiveFindBD(dsk)
1373 raise errors.BlockDeviceError("Can't find device %s" % str(dsk))
1374 stats.append(rbd.CombinedSyncStatus())
1378 def _RecursiveFindBD(disk):
1379 """Check if a device is activated.
1381 If so, return informations about the real device.
1383 @type disk: L{objects.Disk}
1384 @param disk: the disk object we need to find
1386 @return: None if the device can't be found,
1387 otherwise the device instance
1392 for chdisk in disk.children:
1393 children.append(_RecursiveFindBD(chdisk))
1395 return bdev.FindDevice(disk.dev_type, disk.physical_id, children)
1398 def BlockdevFind(disk):
1399 """Check if a device is activated.
1401 If it is, return informations about the real device.
1403 @type disk: L{objects.Disk}
1404 @param disk: the disk to find
1405 @rtype: None or tuple
1406 @return: None if the disk cannot be found, otherwise a
1407 tuple (device_path, major, minor, sync_percent,
1408 estimated_time, is_degraded)
1412 rbd = _RecursiveFindBD(disk)
1413 except errors.BlockDeviceError, err:
1414 return (False, str(err))
1417 return (True, (rbd.dev_path, rbd.major, rbd.minor) + rbd.GetSyncStatus())
1420 def UploadFile(file_name, data, mode, uid, gid, atime, mtime):
1421 """Write a file to the filesystem.
1423 This allows the master to overwrite(!) a file. It will only perform
1424 the operation if the file belongs to a list of configuration files.
1426 @type file_name: str
1427 @param file_name: the target file name
1429 @param data: the new contents of the file
1431 @param mode: the mode to give the file (can be None)
1433 @param uid: the owner of the file (can be -1 for default)
1435 @param gid: the group of the file (can be -1 for default)
1437 @param atime: the atime to set on the file (can be None)
1439 @param mtime: the mtime to set on the file (can be None)
1441 @return: the success of the operation; errors are logged
1442 in the node daemon log
1445 if not os.path.isabs(file_name):
1446 logging.error("Filename passed to UploadFile is not absolute: '%s'",
1451 constants.CLUSTER_CONF_FILE,
1452 constants.ETC_HOSTS,
1453 constants.SSH_KNOWN_HOSTS_FILE,
1454 constants.VNC_PASSWORD_FILE,
1457 if file_name not in allowed_files:
1458 logging.error("Filename passed to UploadFile not in allowed"
1459 " upload targets: '%s'", file_name)
1462 raw_data = _Decompress(data)
1464 utils.WriteFile(file_name, data=raw_data, mode=mode, uid=uid, gid=gid,
1465 atime=atime, mtime=mtime)
1469 def WriteSsconfFiles(values):
1470 """Update all ssconf files.
1472 Wrapper around the SimpleStore.WriteFiles.
1475 ssconf.SimpleStore().WriteFiles(values)
1478 def _ErrnoOrStr(err):
1479 """Format an EnvironmentError exception.
1481 If the L{err} argument has an errno attribute, it will be looked up
1482 and converted into a textual C{E...} description. Otherwise the
1483 string representation of the error will be returned.
1485 @type err: L{EnvironmentError}
1486 @param err: the exception to format
1489 if hasattr(err, 'errno'):
1490 detail = errno.errorcode[err.errno]
1496 def _OSOndiskVersion(name, os_dir):
1497 """Compute and return the API version of a given OS.
1499 This function will try to read the API version of the OS given by
1500 the 'name' parameter and residing in the 'os_dir' directory.
1503 @param name: the OS name we should look for
1505 @param os_dir: the directory inwhich we should look for the OS
1508 Either an integer denoting the version or None in the
1509 case when this is not a valid OS name.
1510 @raise errors.InvalidOS: if the OS cannot be found
1513 api_file = os.path.sep.join([os_dir, "ganeti_api_version"])
1516 st = os.stat(api_file)
1517 except EnvironmentError, err:
1518 raise errors.InvalidOS(name, os_dir, "'ganeti_api_version' file not"
1519 " found (%s)" % _ErrnoOrStr(err))
1521 if not stat.S_ISREG(stat.S_IFMT(st.st_mode)):
1522 raise errors.InvalidOS(name, os_dir, "'ganeti_api_version' file is not"
1528 api_versions = f.readlines()
1531 except EnvironmentError, err:
1532 raise errors.InvalidOS(name, os_dir, "error while reading the"
1533 " API version (%s)" % _ErrnoOrStr(err))
1535 api_versions = [version.strip() for version in api_versions]
1537 api_versions = [int(version) for version in api_versions]
1538 except (TypeError, ValueError), err:
1539 raise errors.InvalidOS(name, os_dir,
1540 "API version is not integer (%s)" % str(err))
1545 def DiagnoseOS(top_dirs=None):
1546 """Compute the validity for all OSes.
1548 @type top_dirs: list
1549 @param top_dirs: the list of directories in which to
1550 search (if not given defaults to
1551 L{constants.OS_SEARCH_PATH})
1552 @rtype: list of L{objects.OS}
1553 @return: an OS object for each name in all the given
1557 if top_dirs is None:
1558 top_dirs = constants.OS_SEARCH_PATH
1561 for dir_name in top_dirs:
1562 if os.path.isdir(dir_name):
1564 f_names = utils.ListVisibleFiles(dir_name)
1565 except EnvironmentError, err:
1566 logging.exception("Can't list the OS directory %s", dir_name)
1568 for name in f_names:
1570 os_inst = OSFromDisk(name, base_dir=dir_name)
1571 result.append(os_inst)
1572 except errors.InvalidOS, err:
1573 result.append(objects.OS.FromInvalidOS(err))
1578 def OSFromDisk(name, base_dir=None):
1579 """Create an OS instance from disk.
1581 This function will return an OS instance if the given name is a
1582 valid OS name. Otherwise, it will raise an appropriate
1583 L{errors.InvalidOS} exception, detailing why this is not a valid OS.
1585 @type base_dir: string
1586 @keyword base_dir: Base directory containing OS installations.
1587 Defaults to a search in all the OS_SEARCH_PATH dirs.
1588 @rtype: L{objects.OS}
1589 @return: the OS instance if we find a valid one
1590 @raise errors.InvalidOS: if we don't find a valid OS
1593 if base_dir is None:
1594 os_dir = utils.FindFile(name, constants.OS_SEARCH_PATH, os.path.isdir)
1596 raise errors.InvalidOS(name, None, "OS dir not found in search path")
1598 os_dir = os.path.sep.join([base_dir, name])
1600 api_versions = _OSOndiskVersion(name, os_dir)
1602 if constants.OS_API_VERSION not in api_versions:
1603 raise errors.InvalidOS(name, os_dir, "API version mismatch"
1604 " (found %s want %s)"
1605 % (api_versions, constants.OS_API_VERSION))
1607 # OS Scripts dictionary, we will populate it with the actual script names
1608 os_scripts = dict.fromkeys(constants.OS_SCRIPTS)
1610 for script in os_scripts:
1611 os_scripts[script] = os.path.sep.join([os_dir, script])
1614 st = os.stat(os_scripts[script])
1615 except EnvironmentError, err:
1616 raise errors.InvalidOS(name, os_dir, "'%s' script missing (%s)" %
1617 (script, _ErrnoOrStr(err)))
1619 if stat.S_IMODE(st.st_mode) & stat.S_IXUSR != stat.S_IXUSR:
1620 raise errors.InvalidOS(name, os_dir, "'%s' script not executable" %
1623 if not stat.S_ISREG(stat.S_IFMT(st.st_mode)):
1624 raise errors.InvalidOS(name, os_dir, "'%s' is not a regular file" %
1628 return objects.OS(name=name, path=os_dir, status=constants.OS_VALID_STATUS,
1629 create_script=os_scripts[constants.OS_SCRIPT_CREATE],
1630 export_script=os_scripts[constants.OS_SCRIPT_EXPORT],
1631 import_script=os_scripts[constants.OS_SCRIPT_IMPORT],
1632 rename_script=os_scripts[constants.OS_SCRIPT_RENAME],
1633 api_versions=api_versions)
1635 def OSEnvironment(instance, debug=0):
1636 """Calculate the environment for an os script.
1638 @type instance: L{objects.Instance}
1639 @param instance: target instance for the os script run
1640 @type debug: integer
1641 @param debug: debug level (0 or 1, for OS Api 10)
1643 @return: dict of environment variables
1644 @raise errors.BlockDeviceError: if the block device
1649 result['OS_API_VERSION'] = '%d' % constants.OS_API_VERSION
1650 result['INSTANCE_NAME'] = instance.name
1651 result['INSTANCE_OS'] = instance.os
1652 result['HYPERVISOR'] = instance.hypervisor
1653 result['DISK_COUNT'] = '%d' % len(instance.disks)
1654 result['NIC_COUNT'] = '%d' % len(instance.nics)
1655 result['DEBUG_LEVEL'] = '%d' % debug
1656 for idx, disk in enumerate(instance.disks):
1657 real_disk = _RecursiveFindBD(disk)
1658 if real_disk is None:
1659 raise errors.BlockDeviceError("Block device '%s' is not set up" %
1662 result['DISK_%d_PATH' % idx] = real_disk.dev_path
1663 # FIXME: When disks will have read-only mode, populate this
1664 result['DISK_%d_ACCESS' % idx] = disk.mode
1665 if constants.HV_DISK_TYPE in instance.hvparams:
1666 result['DISK_%d_FRONTEND_TYPE' % idx] = \
1667 instance.hvparams[constants.HV_DISK_TYPE]
1668 if disk.dev_type in constants.LDS_BLOCK:
1669 result['DISK_%d_BACKEND_TYPE' % idx] = 'block'
1670 elif disk.dev_type == constants.LD_FILE:
1671 result['DISK_%d_BACKEND_TYPE' % idx] = \
1672 'file:%s' % disk.physical_id[0]
1673 for idx, nic in enumerate(instance.nics):
1674 result['NIC_%d_MAC' % idx] = nic.mac
1676 result['NIC_%d_IP' % idx] = nic.ip
1677 result['NIC_%d_BRIDGE' % idx] = nic.bridge
1678 if constants.HV_NIC_TYPE in instance.hvparams:
1679 result['NIC_%d_FRONTEND_TYPE' % idx] = \
1680 instance.hvparams[constants.HV_NIC_TYPE]
1684 def BlockdevGrow(disk, amount):
1685 """Grow a stack of block devices.
1687 This function is called recursively, with the childrens being the
1688 first ones to resize.
1690 @type disk: L{objects.Disk}
1691 @param disk: the disk to be grown
1692 @rtype: (status, result)
1693 @return: a tuple with the status of the operation
1694 (True/False), and the errors message if status
1698 r_dev = _RecursiveFindBD(disk)
1700 return False, "Cannot find block device %s" % (disk,)
1704 except errors.BlockDeviceError, err:
1705 return False, str(err)
1710 def BlockdevSnapshot(disk):
1711 """Create a snapshot copy of a block device.
1713 This function is called recursively, and the snapshot is actually created
1714 just for the leaf lvm backend device.
1716 @type disk: L{objects.Disk}
1717 @param disk: the disk to be snapshotted
1719 @return: snapshot disk path
1723 if len(disk.children) == 1:
1724 # only one child, let's recurse on it
1725 return BlockdevSnapshot(disk.children[0])
1727 # more than one child, choose one that matches
1728 for child in disk.children:
1729 if child.size == disk.size:
1730 # return implies breaking the loop
1731 return BlockdevSnapshot(child)
1732 elif disk.dev_type == constants.LD_LV:
1733 r_dev = _RecursiveFindBD(disk)
1734 if r_dev is not None:
1735 # let's stay on the safe side and ask for the full size, for now
1736 return r_dev.Snapshot(disk.size)
1740 raise errors.ProgrammerError("Cannot snapshot non-lvm block device"
1741 " '%s' of type '%s'" %
1742 (disk.unique_id, disk.dev_type))
1745 def ExportSnapshot(disk, dest_node, instance, cluster_name, idx):
1746 """Export a block device snapshot to a remote node.
1748 @type disk: L{objects.Disk}
1749 @param disk: the description of the disk to export
1750 @type dest_node: str
1751 @param dest_node: the destination node to export to
1752 @type instance: L{objects.Instance}
1753 @param instance: the instance object to whom the disk belongs
1754 @type cluster_name: str
1755 @param cluster_name: the cluster name, needed for SSH hostalias
1757 @param idx: the index of the disk in the instance's disk list,
1758 used to export to the OS scripts environment
1760 @return: the success of the operation
1763 export_env = OSEnvironment(instance)
1765 inst_os = OSFromDisk(instance.os)
1766 export_script = inst_os.export_script
1768 logfile = "%s/exp-%s-%s-%s.log" % (constants.LOG_OS_DIR, inst_os.name,
1769 instance.name, int(time.time()))
1770 if not os.path.exists(constants.LOG_OS_DIR):
1771 os.mkdir(constants.LOG_OS_DIR, 0750)
1772 real_disk = _RecursiveFindBD(disk)
1773 if real_disk is None:
1774 raise errors.BlockDeviceError("Block device '%s' is not set up" %
1778 export_env['EXPORT_DEVICE'] = real_disk.dev_path
1779 export_env['EXPORT_INDEX'] = str(idx)
1781 destdir = os.path.join(constants.EXPORT_DIR, instance.name + ".new")
1782 destfile = disk.physical_id[1]
1784 # the target command is built out of three individual commands,
1785 # which are joined by pipes; we check each individual command for
1787 expcmd = utils.BuildShellCmd("cd %s; %s 2>%s", inst_os.path,
1788 export_script, logfile)
1792 destcmd = utils.BuildShellCmd("mkdir -p %s && cat > %s/%s",
1793 destdir, destdir, destfile)
1794 remotecmd = _GetSshRunner(cluster_name).BuildCmd(dest_node,
1795 constants.GANETI_RUNAS,
1798 # all commands have been checked, so we're safe to combine them
1799 command = '|'.join([expcmd, comprcmd, utils.ShellQuoteArgs(remotecmd)])
1801 result = utils.RunCmd(command, env=export_env)
1804 logging.error("os snapshot export command '%s' returned error: %s"
1805 " output: %s", command, result.fail_reason, result.output)
1811 def FinalizeExport(instance, snap_disks):
1812 """Write out the export configuration information.
1814 @type instance: L{objects.Instance}
1815 @param instance: the instance which we export, used for
1816 saving configuration
1817 @type snap_disks: list of L{objects.Disk}
1818 @param snap_disks: list of snapshot block devices, which
1819 will be used to get the actual name of the dump file
1822 @return: the success of the operation
1825 destdir = os.path.join(constants.EXPORT_DIR, instance.name + ".new")
1826 finaldestdir = os.path.join(constants.EXPORT_DIR, instance.name)
1828 config = objects.SerializableConfigParser()
1830 config.add_section(constants.INISECT_EXP)
1831 config.set(constants.INISECT_EXP, 'version', '0')
1832 config.set(constants.INISECT_EXP, 'timestamp', '%d' % int(time.time()))
1833 config.set(constants.INISECT_EXP, 'source', instance.primary_node)
1834 config.set(constants.INISECT_EXP, 'os', instance.os)
1835 config.set(constants.INISECT_EXP, 'compression', 'gzip')
1837 config.add_section(constants.INISECT_INS)
1838 config.set(constants.INISECT_INS, 'name', instance.name)
1839 config.set(constants.INISECT_INS, 'memory', '%d' %
1840 instance.beparams[constants.BE_MEMORY])
1841 config.set(constants.INISECT_INS, 'vcpus', '%d' %
1842 instance.beparams[constants.BE_VCPUS])
1843 config.set(constants.INISECT_INS, 'disk_template', instance.disk_template)
1846 for nic_count, nic in enumerate(instance.nics):
1848 config.set(constants.INISECT_INS, 'nic%d_mac' %
1849 nic_count, '%s' % nic.mac)
1850 config.set(constants.INISECT_INS, 'nic%d_ip' % nic_count, '%s' % nic.ip)
1851 config.set(constants.INISECT_INS, 'nic%d_bridge' % nic_count,
1853 # TODO: redundant: on load can read nics until it doesn't exist
1854 config.set(constants.INISECT_INS, 'nic_count' , '%d' % nic_total)
1857 for disk_count, disk in enumerate(snap_disks):
1860 config.set(constants.INISECT_INS, 'disk%d_ivname' % disk_count,
1861 ('%s' % disk.iv_name))
1862 config.set(constants.INISECT_INS, 'disk%d_dump' % disk_count,
1863 ('%s' % disk.physical_id[1]))
1864 config.set(constants.INISECT_INS, 'disk%d_size' % disk_count,
1867 config.set(constants.INISECT_INS, 'disk_count' , '%d' % disk_total)
1869 utils.WriteFile(os.path.join(destdir, constants.EXPORT_CONF_FILE),
1870 data=config.Dumps())
1871 shutil.rmtree(finaldestdir, True)
1872 shutil.move(destdir, finaldestdir)
1877 def ExportInfo(dest):
1878 """Get export configuration information.
1881 @param dest: directory containing the export
1883 @rtype: L{objects.SerializableConfigParser}
1884 @return: a serializable config file containing the
1888 cff = os.path.join(dest, constants.EXPORT_CONF_FILE)
1890 config = objects.SerializableConfigParser()
1893 if (not config.has_section(constants.INISECT_EXP) or
1894 not config.has_section(constants.INISECT_INS)):
1900 def ImportOSIntoInstance(instance, src_node, src_images, cluster_name):
1901 """Import an os image into an instance.
1903 @type instance: L{objects.Instance}
1904 @param instance: instance to import the disks into
1905 @type src_node: string
1906 @param src_node: source node for the disk images
1907 @type src_images: list of string
1908 @param src_images: absolute paths of the disk images
1909 @rtype: list of boolean
1910 @return: each boolean represent the success of importing the n-th disk
1913 import_env = OSEnvironment(instance)
1914 inst_os = OSFromDisk(instance.os)
1915 import_script = inst_os.import_script
1917 logfile = "%s/import-%s-%s-%s.log" % (constants.LOG_OS_DIR, instance.os,
1918 instance.name, int(time.time()))
1919 if not os.path.exists(constants.LOG_OS_DIR):
1920 os.mkdir(constants.LOG_OS_DIR, 0750)
1923 impcmd = utils.BuildShellCmd("(cd %s; %s >%s 2>&1)", inst_os.path,
1924 import_script, logfile)
1927 for idx, image in enumerate(src_images):
1929 destcmd = utils.BuildShellCmd('cat %s', image)
1930 remotecmd = _GetSshRunner(cluster_name).BuildCmd(src_node,
1931 constants.GANETI_RUNAS,
1933 command = '|'.join([utils.ShellQuoteArgs(remotecmd), comprcmd, impcmd])
1934 import_env['IMPORT_DEVICE'] = import_env['DISK_%d_PATH' % idx]
1935 import_env['IMPORT_INDEX'] = str(idx)
1936 result = utils.RunCmd(command, env=import_env)
1938 logging.error("Disk import command '%s' returned error: %s"
1939 " output: %s", command, result.fail_reason,
1941 final_result.append(False)
1943 final_result.append(True)
1945 final_result.append(True)
1951 """Return a list of exports currently available on this machine.
1954 @return: list of the exports
1957 if os.path.isdir(constants.EXPORT_DIR):
1958 return utils.ListVisibleFiles(constants.EXPORT_DIR)
1963 def RemoveExport(export):
1964 """Remove an existing export from the node.
1967 @param export: the name of the export to remove
1969 @return: the success of the operation
1972 target = os.path.join(constants.EXPORT_DIR, export)
1974 shutil.rmtree(target)
1975 # TODO: catch some of the relevant exceptions and provide a pretty
1976 # error message if rmtree fails.
1981 def BlockdevRename(devlist):
1982 """Rename a list of block devices.
1984 @type devlist: list of tuples
1985 @param devlist: list of tuples of the form (disk,
1986 new_logical_id, new_physical_id); disk is an
1987 L{objects.Disk} object describing the current disk,
1988 and new logical_id/physical_id is the name we
1991 @return: True if all renames succeeded, False otherwise
1995 for disk, unique_id in devlist:
1996 dev = _RecursiveFindBD(disk)
2001 old_rpath = dev.dev_path
2002 dev.Rename(unique_id)
2003 new_rpath = dev.dev_path
2004 if old_rpath != new_rpath:
2005 DevCacheManager.RemoveCache(old_rpath)
2006 # FIXME: we should add the new cache information here, like:
2007 # DevCacheManager.UpdateCache(new_rpath, owner, ...)
2008 # but we don't have the owner here - maybe parse from existing
2009 # cache? for now, we only lose lvm data when we rename, which
2010 # is less critical than DRBD or MD
2011 except errors.BlockDeviceError, err:
2012 logging.exception("Can't rename device '%s' to '%s'", dev, unique_id)
2017 def _TransformFileStorageDir(file_storage_dir):
2018 """Checks whether given file_storage_dir is valid.
2020 Checks wheter the given file_storage_dir is within the cluster-wide
2021 default file_storage_dir stored in SimpleStore. Only paths under that
2022 directory are allowed.
2024 @type file_storage_dir: str
2025 @param file_storage_dir: the path to check
2027 @return: the normalized path if valid, None otherwise
2031 file_storage_dir = os.path.normpath(file_storage_dir)
2032 base_file_storage_dir = cfg.GetFileStorageDir()
2033 if (not os.path.commonprefix([file_storage_dir, base_file_storage_dir]) ==
2034 base_file_storage_dir):
2035 logging.error("file storage directory '%s' is not under base file"
2036 " storage directory '%s'",
2037 file_storage_dir, base_file_storage_dir)
2039 return file_storage_dir
2042 def CreateFileStorageDir(file_storage_dir):
2043 """Create file storage directory.
2045 @type file_storage_dir: str
2046 @param file_storage_dir: directory to create
2049 @return: tuple with first element a boolean indicating wheter dir
2050 creation was successful or not
2053 file_storage_dir = _TransformFileStorageDir(file_storage_dir)
2055 if not file_storage_dir:
2058 if os.path.exists(file_storage_dir):
2059 if not os.path.isdir(file_storage_dir):
2060 logging.error("'%s' is not a directory", file_storage_dir)
2064 os.makedirs(file_storage_dir, 0750)
2065 except OSError, err:
2066 logging.error("Cannot create file storage directory '%s': %s",
2067 file_storage_dir, err)
2072 def RemoveFileStorageDir(file_storage_dir):
2073 """Remove file storage directory.
2075 Remove it only if it's empty. If not log an error and return.
2077 @type file_storage_dir: str
2078 @param file_storage_dir: the directory we should cleanup
2079 @rtype: tuple (success,)
2080 @return: tuple of one element, C{success}, denoting
2081 whether the operation was successfull
2084 file_storage_dir = _TransformFileStorageDir(file_storage_dir)
2086 if not file_storage_dir:
2089 if os.path.exists(file_storage_dir):
2090 if not os.path.isdir(file_storage_dir):
2091 logging.error("'%s' is not a directory", file_storage_dir)
2093 # deletes dir only if empty, otherwise we want to return False
2095 os.rmdir(file_storage_dir)
2096 except OSError, err:
2097 logging.exception("Cannot remove file storage directory '%s'",
2103 def RenameFileStorageDir(old_file_storage_dir, new_file_storage_dir):
2104 """Rename the file storage directory.
2106 @type old_file_storage_dir: str
2107 @param old_file_storage_dir: the current path
2108 @type new_file_storage_dir: str
2109 @param new_file_storage_dir: the name we should rename to
2110 @rtype: tuple (success,)
2111 @return: tuple of one element, C{success}, denoting
2112 whether the operation was successful
2115 old_file_storage_dir = _TransformFileStorageDir(old_file_storage_dir)
2116 new_file_storage_dir = _TransformFileStorageDir(new_file_storage_dir)
2118 if not old_file_storage_dir or not new_file_storage_dir:
2121 if not os.path.exists(new_file_storage_dir):
2122 if os.path.isdir(old_file_storage_dir):
2124 os.rename(old_file_storage_dir, new_file_storage_dir)
2125 except OSError, err:
2126 logging.exception("Cannot rename '%s' to '%s'",
2127 old_file_storage_dir, new_file_storage_dir)
2130 logging.error("'%s' is not a directory", old_file_storage_dir)
2133 if os.path.exists(old_file_storage_dir):
2134 logging.error("Cannot rename '%s' to '%s'. Both locations exist.",
2135 old_file_storage_dir, new_file_storage_dir)
2140 def _IsJobQueueFile(file_name):
2141 """Checks whether the given filename is in the queue directory.
2143 @type file_name: str
2144 @param file_name: the file name we should check
2146 @return: whether the file is under the queue directory
2149 queue_dir = os.path.normpath(constants.QUEUE_DIR)
2150 result = (os.path.commonprefix([queue_dir, file_name]) == queue_dir)
2153 logging.error("'%s' is not a file in the queue directory",
2159 def JobQueueUpdate(file_name, content):
2160 """Updates a file in the queue directory.
2162 This is just a wrapper over L{utils.WriteFile}, with proper
2165 @type file_name: str
2166 @param file_name: the job file name
2168 @param content: the new job contents
2170 @return: the success of the operation
2173 if not _IsJobQueueFile(file_name):
2176 # Write and replace the file atomically
2177 utils.WriteFile(file_name, data=_Decompress(content))
2182 def JobQueueRename(old, new):
2183 """Renames a job queue file.
2185 This is just a wrapper over os.rename with proper checking.
2188 @param old: the old (actual) file name
2190 @param new: the desired file name
2192 @return: the success of the operation
2195 if not (_IsJobQueueFile(old) and _IsJobQueueFile(new)):
2198 utils.RenameFile(old, new, mkdir=True)
2203 def JobQueueSetDrainFlag(drain_flag):
2204 """Set the drain flag for the queue.
2206 This will set or unset the queue drain flag.
2208 @type drain_flag: boolean
2209 @param drain_flag: if True, will set the drain flag, otherwise reset it.
2211 @return: always True
2212 @warning: the function always returns True
2216 utils.WriteFile(constants.JOB_QUEUE_DRAIN_FILE, data="", close=True)
2218 utils.RemoveFile(constants.JOB_QUEUE_DRAIN_FILE)
2223 def BlockdevClose(instance_name, disks):
2224 """Closes the given block devices.
2226 This means they will be switched to secondary mode (in case of
2229 @param instance_name: if the argument is not empty, the symlinks
2230 of this instance will be removed
2231 @type disks: list of L{objects.Disk}
2232 @param disks: the list of disks to be closed
2233 @rtype: tuple (success, message)
2234 @return: a tuple of success and message, where success
2235 indicates the succes of the operation, and message
2236 which will contain the error details in case we
2242 rd = _RecursiveFindBD(cf)
2244 return (False, "Can't find device %s" % cf)
2251 except errors.BlockDeviceError, err:
2252 msg.append(str(err))
2254 return (False, "Can't make devices secondary: %s" % ",".join(msg))
2257 _RemoveBlockDevLinks(instance_name, disks)
2258 return (True, "All devices secondary")
2261 def ValidateHVParams(hvname, hvparams):
2262 """Validates the given hypervisor parameters.
2264 @type hvname: string
2265 @param hvname: the hypervisor name
2266 @type hvparams: dict
2267 @param hvparams: the hypervisor parameters to be validated
2268 @rtype: tuple (success, message)
2269 @return: a tuple of success and message, where success
2270 indicates the succes of the operation, and message
2271 which will contain the error details in case we
2276 hv_type = hypervisor.GetHypervisor(hvname)
2277 hv_type.ValidateParameters(hvparams)
2278 return (True, "Validation passed")
2279 except errors.HypervisorError, err:
2280 return (False, str(err))
2284 """Demotes the current node from master candidate role.
2287 # try to ensure we're not the master by mistake
2288 master, myself = ssconf.GetMasterAndMyself()
2289 if master == myself:
2290 return (False, "ssconf status shows I'm the master node, will not demote")
2291 pid_file = utils.DaemonPidFileName(constants.MASTERD_PID)
2292 if utils.IsProcessAlive(utils.ReadPidFile(pid_file)):
2293 return (False, "The master daemon is running, will not demote")
2295 utils.CreateBackup(constants.CLUSTER_CONF_FILE)
2296 except EnvironmentError, err:
2297 if err.errno != errno.ENOENT:
2298 return (False, "Error while backing up cluster file: %s" % str(err))
2299 utils.RemoveFile(constants.CLUSTER_CONF_FILE)
2300 return (True, "Done")
2303 def _FindDisks(nodes_ip, disks):
2304 """Sets the physical ID on disks and returns the block devices.
2307 # set the correct physical ID
2308 my_name = utils.HostInfo().name
2310 cf.SetPhysicalID(my_name, nodes_ip)
2315 rd = _RecursiveFindBD(cf)
2317 return (False, "Can't find device %s" % cf)
2319 return (True, bdevs)
2322 def DrbdDisconnectNet(nodes_ip, disks):
2323 """Disconnects the network on a list of drbd devices.
2326 status, bdevs = _FindDisks(nodes_ip, disks)
2328 return status, bdevs
2334 except errors.BlockDeviceError, err:
2335 logging.exception("Failed to go into standalone mode")
2336 return (False, "Can't change network configuration: %s" % str(err))
2337 return (True, "All disks are now disconnected")
2340 def DrbdAttachNet(nodes_ip, disks, instance_name, multimaster):
2341 """Attaches the network on a list of drbd devices.
2344 status, bdevs = _FindDisks(nodes_ip, disks)
2346 return status, bdevs
2349 for idx, rd in enumerate(bdevs):
2351 _SymlinkBlockDev(instance_name, rd.dev_path, idx)
2352 except EnvironmentError, err:
2353 return (False, "Can't create symlink: %s" % str(err))
2354 # reconnect disks, switch to new master configuration and if
2355 # needed primary mode
2358 rd.AttachNet(multimaster)
2359 except errors.BlockDeviceError, err:
2360 return (False, "Can't change network configuration: %s" % str(err))
2361 # wait until the disks are connected; we need to retry the re-attach
2362 # if the device becomes standalone, as this might happen if the one
2363 # node disconnects and reconnects in a different mode before the
2364 # other node reconnects; in this case, one or both of the nodes will
2365 # decide it has wrong configuration and switch to standalone
2366 RECONNECT_TIMEOUT = 2 * 60
2367 sleep_time = 0.100 # start with 100 miliseconds
2368 timeout_limit = time.time() + RECONNECT_TIMEOUT
2369 while time.time() < timeout_limit:
2370 all_connected = True
2372 stats = rd.GetProcStatus()
2373 if not (stats.is_connected or stats.is_in_resync):
2374 all_connected = False
2375 if stats.is_standalone:
2376 # peer had different config info and this node became
2377 # standalone, even though this should not happen with the
2378 # new staged way of changing disk configs
2380 rd.ReAttachNet(multimaster)
2381 except errors.BlockDeviceError, err:
2382 return (False, "Can't change network configuration: %s" % str(err))
2385 time.sleep(sleep_time)
2386 sleep_time = min(5, sleep_time * 1.5)
2387 if not all_connected:
2388 return (False, "Timeout in disk reconnecting")
2390 # change to primary mode
2394 except errors.BlockDeviceError, err:
2395 return (False, "Can't change to primary mode: %s" % str(err))
2397 msg = "multi-master and primary"
2399 msg = "single-master"
2400 return (True, "Disks are now configured as %s" % msg)
2403 def DrbdWaitSync(nodes_ip, disks):
2404 """Wait until DRBDs have synchronized.
2407 status, bdevs = _FindDisks(nodes_ip, disks)
2409 return status, bdevs
2415 stats = rd.GetProcStatus()
2416 if not (stats.is_connected or stats.is_in_resync):
2419 alldone = alldone and (not stats.is_in_resync)
2420 if stats.sync_percent is not None:
2421 min_resync = min(min_resync, stats.sync_percent)
2422 return (not failure, (alldone, min_resync))
2425 class HooksRunner(object):
2428 This class is instantiated on the node side (ganeti-noded) and not
2432 RE_MASK = re.compile("^[a-zA-Z0-9_-]+$")
2434 def __init__(self, hooks_base_dir=None):
2435 """Constructor for hooks runner.
2437 @type hooks_base_dir: str or None
2438 @param hooks_base_dir: if not None, this overrides the
2439 L{constants.HOOKS_BASE_DIR} (useful for unittests)
2442 if hooks_base_dir is None:
2443 hooks_base_dir = constants.HOOKS_BASE_DIR
2444 self._BASE_DIR = hooks_base_dir
2447 def ExecHook(script, env):
2448 """Exec one hook script.
2451 @param script: the full path to the script
2453 @param env: the environment with which to exec the script
2454 @rtype: tuple (success, message)
2455 @return: a tuple of success and message, where success
2456 indicates the succes of the operation, and message
2457 which will contain the error details in case we
2461 # exec the process using subprocess and log the output
2464 fdstdin = open("/dev/null", "r")
2465 child = subprocess.Popen([script], stdin=fdstdin, stdout=subprocess.PIPE,
2466 stderr=subprocess.STDOUT, close_fds=True,
2467 shell=False, cwd="/", env=env)
2470 output = child.stdout.read(4096)
2471 child.stdout.close()
2472 except EnvironmentError, err:
2473 output += "Hook script error: %s" % str(err)
2477 result = child.wait()
2479 except EnvironmentError, err:
2480 if err.errno == errno.EINTR:
2484 # try not to leak fds
2485 for fd in (fdstdin, ):
2489 except EnvironmentError, err:
2490 # just log the error
2491 #logging.exception("Error while closing fd %s", fd)
2494 return result == 0, utils.SafeEncode(output.strip())
2496 def RunHooks(self, hpath, phase, env):
2497 """Run the scripts in the hooks directory.
2500 @param hpath: the path to the hooks directory which
2503 @param phase: either L{constants.HOOKS_PHASE_PRE} or
2504 L{constants.HOOKS_PHASE_POST}
2506 @param env: dictionary with the environment for the hook
2508 @return: list of 3-element tuples:
2510 - script result, either L{constants.HKR_SUCCESS} or
2511 L{constants.HKR_FAIL}
2512 - output of the script
2514 @raise errors.ProgrammerError: for invalid input
2518 if phase == constants.HOOKS_PHASE_PRE:
2520 elif phase == constants.HOOKS_PHASE_POST:
2523 raise errors.ProgrammerError("Unknown hooks phase: '%s'" % phase)
2526 subdir = "%s-%s.d" % (hpath, suffix)
2527 dir_name = "%s/%s" % (self._BASE_DIR, subdir)
2529 dir_contents = utils.ListVisibleFiles(dir_name)
2530 except OSError, err:
2531 # FIXME: must log output in case of failures
2534 # we use the standard python sort order,
2535 # so 00name is the recommended naming scheme
2537 for relname in dir_contents:
2538 fname = os.path.join(dir_name, relname)
2539 if not (os.path.isfile(fname) and os.access(fname, os.X_OK) and
2540 self.RE_MASK.match(relname) is not None):
2541 rrval = constants.HKR_SKIP
2544 result, output = self.ExecHook(fname, env)
2546 rrval = constants.HKR_FAIL
2548 rrval = constants.HKR_SUCCESS
2549 rr.append(("%s/%s" % (subdir, relname), rrval, output))
2554 class IAllocatorRunner(object):
2555 """IAllocator runner.
2557 This class is instantiated on the node side (ganeti-noded) and not on
2561 def Run(self, name, idata):
2562 """Run an iallocator script.
2565 @param name: the iallocator script name
2567 @param idata: the allocator input data
2570 @return: four element tuple of:
2571 - run status (one of the IARUN_ constants)
2574 - fail reason (as from L{utils.RunResult})
2577 alloc_script = utils.FindFile(name, constants.IALLOCATOR_SEARCH_PATH,
2579 if alloc_script is None:
2580 return (constants.IARUN_NOTFOUND, None, None, None)
2582 fd, fin_name = tempfile.mkstemp(prefix="ganeti-iallocator.")
2586 result = utils.RunCmd([alloc_script, fin_name])
2588 return (constants.IARUN_FAILURE, result.stdout, result.stderr,
2593 return (constants.IARUN_SUCCESS, result.stdout, result.stderr, None)
2596 class DevCacheManager(object):
2597 """Simple class for managing a cache of block device information.
2600 _DEV_PREFIX = "/dev/"
2601 _ROOT_DIR = constants.BDEV_CACHE_DIR
2604 def _ConvertPath(cls, dev_path):
2605 """Converts a /dev/name path to the cache file name.
2607 This replaces slashes with underscores and strips the /dev
2608 prefix. It then returns the full path to the cache file.
2611 @param dev_path: the C{/dev/} path name
2613 @return: the converted path name
2616 if dev_path.startswith(cls._DEV_PREFIX):
2617 dev_path = dev_path[len(cls._DEV_PREFIX):]
2618 dev_path = dev_path.replace("/", "_")
2619 fpath = "%s/bdev_%s" % (cls._ROOT_DIR, dev_path)
2623 def UpdateCache(cls, dev_path, owner, on_primary, iv_name):
2624 """Updates the cache information for a given device.
2627 @param dev_path: the pathname of the device
2629 @param owner: the owner (instance name) of the device
2630 @type on_primary: bool
2631 @param on_primary: whether this is the primary
2634 @param iv_name: the instance-visible name of the
2635 device, as in objects.Disk.iv_name
2640 if dev_path is None:
2641 logging.error("DevCacheManager.UpdateCache got a None dev_path")
2643 fpath = cls._ConvertPath(dev_path)
2649 iv_name = "not_visible"
2650 fdata = "%s %s %s\n" % (str(owner), state, iv_name)
2652 utils.WriteFile(fpath, data=fdata)
2653 except EnvironmentError, err:
2654 logging.exception("Can't update bdev cache for %s", dev_path)
2657 def RemoveCache(cls, dev_path):
2658 """Remove data for a dev_path.
2660 This is just a wrapper over L{utils.RemoveFile} with a converted
2661 path name and logging.
2664 @param dev_path: the pathname of the device
2669 if dev_path is None:
2670 logging.error("DevCacheManager.RemoveCache got a None dev_path")
2672 fpath = cls._ConvertPath(dev_path)
2674 utils.RemoveFile(fpath)
2675 except EnvironmentError, err:
2676 logging.exception("Can't update bdev cache for %s", dev_path)