4 # Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 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
24 @var _ALLOWED_UPLOAD_FILES: denotes which files are accepted in
25 the L{UploadFile} function
26 @var _ALLOWED_CLEAN_DIRS: denotes which directories are accepted
27 in the L{_CleanDirectory} function
31 # pylint: disable-msg=E1103
33 # E1103: %s %r has no %r member (but some types could not be
34 # inferred), because the _TryOSFromDisk returns either (True, os_obj)
35 # or (False, "string") which confuses pylint
52 from ganeti import errors
53 from ganeti import utils
54 from ganeti import ssh
55 from ganeti import hypervisor
56 from ganeti import constants
57 from ganeti import bdev
58 from ganeti import objects
59 from ganeti import ssconf
60 from ganeti import serializer
61 from ganeti import netutils
62 from ganeti import runtime
65 _BOOT_ID_PATH = "/proc/sys/kernel/random/boot_id"
66 _ALLOWED_CLEAN_DIRS = frozenset([
68 constants.JOB_QUEUE_ARCHIVE_DIR,
70 constants.CRYPTO_KEYS_DIR,
72 _MAX_SSL_CERT_VALIDITY = 7 * 24 * 60 * 60
73 _X509_KEY_FILE = "key"
74 _X509_CERT_FILE = "cert"
75 _IES_STATUS_FILE = "status"
79 #: Valid LVS output line regex
80 _LVSLINE_REGEX = re.compile("^ *([^|]+)\|([^|]+)\|([0-9.]+)\|([^|]{6})\|?$")
83 class RPCFail(Exception):
84 """Class denoting RPC failure.
86 Its argument is the error message.
91 def _Fail(msg, *args, **kwargs):
92 """Log an error and the raise an RPCFail exception.
94 This exception is then handled specially in the ganeti daemon and
95 turned into a 'failed' return type. As such, this function is a
96 useful shortcut for logging the error and returning it to the master
100 @param msg: the text of the exception
106 if "log" not in kwargs or kwargs["log"]: # if we should log this error
107 if "exc" in kwargs and kwargs["exc"]:
108 logging.exception(msg)
115 """Simple wrapper to return a SimpleStore.
117 @rtype: L{ssconf.SimpleStore}
118 @return: a SimpleStore instance
121 return ssconf.SimpleStore()
124 def _GetSshRunner(cluster_name):
125 """Simple wrapper to return an SshRunner.
127 @type cluster_name: str
128 @param cluster_name: the cluster name, which is needed
129 by the SshRunner constructor
130 @rtype: L{ssh.SshRunner}
131 @return: an SshRunner instance
134 return ssh.SshRunner(cluster_name)
137 def _Decompress(data):
138 """Unpacks data compressed by the RPC client.
140 @type data: list or tuple
141 @param data: Data sent by RPC client
143 @return: Decompressed data
146 assert isinstance(data, (list, tuple))
147 assert len(data) == 2
148 (encoding, content) = data
149 if encoding == constants.RPC_ENCODING_NONE:
151 elif encoding == constants.RPC_ENCODING_ZLIB_BASE64:
152 return zlib.decompress(base64.b64decode(content))
154 raise AssertionError("Unknown data encoding")
157 def _CleanDirectory(path, exclude=None):
158 """Removes all regular files in a directory.
161 @param path: the directory to clean
163 @param exclude: list of files to be excluded, defaults
167 if path not in _ALLOWED_CLEAN_DIRS:
168 _Fail("Path passed to _CleanDirectory not in allowed clean targets: '%s'",
171 if not os.path.isdir(path):
176 # Normalize excluded paths
177 exclude = [os.path.normpath(i) for i in exclude]
179 for rel_name in utils.ListVisibleFiles(path):
180 full_name = utils.PathJoin(path, rel_name)
181 if full_name in exclude:
183 if os.path.isfile(full_name) and not os.path.islink(full_name):
184 utils.RemoveFile(full_name)
187 def _BuildUploadFileList():
188 """Build the list of allowed upload files.
190 This is abstracted so that it's built only once at module import time.
193 allowed_files = set([
194 constants.CLUSTER_CONF_FILE,
196 constants.SSH_KNOWN_HOSTS_FILE,
197 constants.VNC_PASSWORD_FILE,
198 constants.RAPI_CERT_FILE,
199 constants.RAPI_USERS_FILE,
200 constants.CONFD_HMAC_KEY,
201 constants.CLUSTER_DOMAIN_SECRET_FILE,
204 for hv_name in constants.HYPER_TYPES:
205 hv_class = hypervisor.GetHypervisorClass(hv_name)
206 allowed_files.update(hv_class.GetAncillaryFiles())
208 return frozenset(allowed_files)
211 _ALLOWED_UPLOAD_FILES = _BuildUploadFileList()
215 """Removes job queue files and archived jobs.
221 _CleanDirectory(constants.QUEUE_DIR, exclude=[constants.JOB_QUEUE_LOCK_FILE])
222 _CleanDirectory(constants.JOB_QUEUE_ARCHIVE_DIR)
226 """Returns master information.
228 This is an utility function to compute master information, either
229 for consumption here or from the node daemon.
232 @return: master_netdev, master_ip, master_name, primary_ip_family
233 @raise RPCFail: in case of errors
238 master_netdev = cfg.GetMasterNetdev()
239 master_ip = cfg.GetMasterIP()
240 master_node = cfg.GetMasterNode()
241 primary_ip_family = cfg.GetPrimaryIPFamily()
242 except errors.ConfigurationError, err:
243 _Fail("Cluster configuration incomplete: %s", err, exc=True)
244 return (master_netdev, master_ip, master_node, primary_ip_family)
247 def StartMaster(start_daemons, no_voting):
248 """Activate local node as master node.
250 The function will either try activate the IP address of the master
251 (unless someone else has it) or also start the master daemons, based
252 on the start_daemons parameter.
254 @type start_daemons: boolean
255 @param start_daemons: whether to start the master daemons
256 (ganeti-masterd and ganeti-rapi), or (if false) activate the
258 @type no_voting: boolean
259 @param no_voting: whether to start ganeti-masterd without a node vote
260 (if start_daemons is True), but still non-interactively
264 # GetMasterInfo will raise an exception if not able to return data
265 master_netdev, master_ip, _, family = GetMasterInfo()
268 # either start the master and rapi daemons
271 masterd_args = "--no-voting --yes-do-it"
276 "EXTRA_MASTERD_ARGS": masterd_args,
279 result = utils.RunCmd([constants.DAEMON_UTIL, "start-master"], env=env)
281 msg = "Can't start Ganeti master: %s" % result.output
286 if netutils.TcpPing(master_ip, constants.DEFAULT_NODED_PORT):
287 if netutils.IPAddress.Own(master_ip):
288 # we already have the ip:
289 logging.debug("Master IP already configured, doing nothing")
291 msg = "Someone else has the master ip, not activating"
295 ipcls = netutils.IP4Address
296 if family == netutils.IP6Address.family:
297 ipcls = netutils.IP6Address
299 result = utils.RunCmd(["ip", "address", "add",
300 "%s/%d" % (master_ip, ipcls.iplen),
301 "dev", master_netdev, "label",
302 "%s:0" % master_netdev])
304 msg = "Can't activate master IP: %s" % result.output
308 # we ignore the exit code of the following cmds
309 if ipcls == netutils.IP4Address:
310 utils.RunCmd(["arping", "-q", "-U", "-c 3", "-I", master_netdev, "-s",
311 master_ip, master_ip])
312 elif ipcls == netutils.IP6Address:
314 utils.RunCmd(["ndisc6", "-q", "-r 3", master_ip, master_netdev])
315 except errors.OpExecError:
316 # TODO: Better error reporting
317 logging.warning("Can't execute ndisc6, please install if missing")
320 _Fail("; ".join(err_msgs))
323 def StopMaster(stop_daemons):
324 """Deactivate this node as master.
326 The function will always try to deactivate the IP address of the
327 master. It will also stop the master daemons depending on the
328 stop_daemons parameter.
330 @type stop_daemons: boolean
331 @param stop_daemons: whether to also stop the master daemons
332 (ganeti-masterd and ganeti-rapi)
336 # TODO: log and report back to the caller the error failures; we
337 # need to decide in which case we fail the RPC for this
339 # GetMasterInfo will raise an exception if not able to return data
340 master_netdev, master_ip, _, family = GetMasterInfo()
342 ipcls = netutils.IP4Address
343 if family == netutils.IP6Address.family:
344 ipcls = netutils.IP6Address
346 result = utils.RunCmd(["ip", "address", "del",
347 "%s/%d" % (master_ip, ipcls.iplen),
348 "dev", master_netdev])
350 logging.error("Can't remove the master IP, error: %s", result.output)
351 # but otherwise ignore the failure
354 result = utils.RunCmd([constants.DAEMON_UTIL, "stop-master"])
356 logging.error("Could not stop Ganeti master, command %s had exitcode %s"
358 result.cmd, result.exit_code, result.output)
361 def EtcHostsModify(mode, host, ip):
362 """Modify a host entry in /etc/hosts.
364 @param mode: The mode to operate. Either add or remove entry
365 @param host: The host to operate on
366 @param ip: The ip associated with the entry
369 if mode == constants.ETC_HOSTS_ADD:
371 RPCFail("Mode 'add' needs 'ip' parameter, but parameter not"
373 utils.AddHostToEtcHosts(host, ip)
374 elif mode == constants.ETC_HOSTS_REMOVE:
376 RPCFail("Mode 'remove' does not allow 'ip' parameter, but"
377 " parameter is present")
378 utils.RemoveHostFromEtcHosts(host)
380 RPCFail("Mode not supported")
383 def LeaveCluster(modify_ssh_setup):
384 """Cleans up and remove the current node.
386 This function cleans up and prepares the current node to be removed
389 If processing is successful, then it raises an
390 L{errors.QuitGanetiException} which is used as a special case to
391 shutdown the node daemon.
393 @param modify_ssh_setup: boolean
396 _CleanDirectory(constants.DATA_DIR)
397 _CleanDirectory(constants.CRYPTO_KEYS_DIR)
402 priv_key, pub_key, auth_keys = ssh.GetUserFiles(constants.GANETI_RUNAS)
404 utils.RemoveAuthorizedKey(auth_keys, utils.ReadFile(pub_key))
406 utils.RemoveFile(priv_key)
407 utils.RemoveFile(pub_key)
408 except errors.OpExecError:
409 logging.exception("Error while processing ssh files")
412 utils.RemoveFile(constants.CONFD_HMAC_KEY)
413 utils.RemoveFile(constants.RAPI_CERT_FILE)
414 utils.RemoveFile(constants.NODED_CERT_FILE)
415 except: # pylint: disable-msg=W0702
416 logging.exception("Error while removing cluster secrets")
418 result = utils.RunCmd([constants.DAEMON_UTIL, "stop", constants.CONFD])
420 logging.error("Command %s failed with exitcode %s and error %s",
421 result.cmd, result.exit_code, result.output)
423 # Raise a custom exception (handled in ganeti-noded)
424 raise errors.QuitGanetiException(True, 'Shutdown scheduled')
427 def GetNodeInfo(vgname, hypervisor_type):
428 """Gives back a hash with different information about the node.
430 @type vgname: C{string}
431 @param vgname: the name of the volume group to ask for disk space information
432 @type hypervisor_type: C{str}
433 @param hypervisor_type: the name of the hypervisor to ask for
436 @return: dictionary with the following keys:
437 - vg_size is the size of the configured volume group in MiB
438 - vg_free is the free size of the volume group in MiB
439 - memory_dom0 is the memory allocated for domain0 in MiB
440 - memory_free is the currently available (free) ram in MiB
441 - memory_total is the total number of ram in MiB
446 if vgname is not None:
447 vginfo = bdev.LogicalVolume.GetVGInfo([vgname])
448 vg_free = vg_size = None
450 vg_free = int(round(vginfo[0][0], 0))
451 vg_size = int(round(vginfo[0][1], 0))
452 outputarray['vg_size'] = vg_size
453 outputarray['vg_free'] = vg_free
455 if hypervisor_type is not None:
456 hyper = hypervisor.GetHypervisor(hypervisor_type)
457 hyp_info = hyper.GetNodeInfo()
458 if hyp_info is not None:
459 outputarray.update(hyp_info)
461 outputarray["bootid"] = utils.ReadFile(_BOOT_ID_PATH, size=128).rstrip("\n")
466 def VerifyNode(what, cluster_name):
467 """Verify the status of the local node.
469 Based on the input L{what} parameter, various checks are done on the
472 If the I{filelist} key is present, this list of
473 files is checksummed and the file/checksum pairs are returned.
475 If the I{nodelist} key is present, we check that we have
476 connectivity via ssh with the target nodes (and check the hostname
479 If the I{node-net-test} key is present, we check that we have
480 connectivity to the given nodes via both primary IP and, if
481 applicable, secondary IPs.
484 @param what: a dictionary of things to check:
485 - filelist: list of files for which to compute checksums
486 - nodelist: list of nodes we should check ssh communication with
487 - node-net-test: list of nodes we should check node daemon port
489 - hypervisor: list with hypervisors to run the verify for
491 @return: a dictionary with the same keys as the input dict, and
492 values representing the result of the checks
496 my_name = netutils.Hostname.GetSysName()
497 port = netutils.GetDaemonPort(constants.NODED)
498 vm_capable = my_name not in what.get(constants.NV_VMNODES, [])
500 if constants.NV_HYPERVISOR in what and vm_capable:
501 result[constants.NV_HYPERVISOR] = tmp = {}
502 for hv_name in what[constants.NV_HYPERVISOR]:
504 val = hypervisor.GetHypervisor(hv_name).Verify()
505 except errors.HypervisorError, err:
506 val = "Error while checking hypervisor: %s" % str(err)
509 if constants.NV_HVPARAMS in what and vm_capable:
510 result[constants.NV_HVPARAMS] = tmp = []
511 for source, hv_name, hvparms in what[constants.NV_HVPARAMS]:
513 logging.info("Validating hv %s, %s", hv_name, hvparms)
514 hypervisor.GetHypervisor(hv_name).ValidateParameters(hvparms)
515 except errors.HypervisorError, err:
516 tmp.append((source, hv_name, str(err)))
518 if constants.NV_FILELIST in what:
519 result[constants.NV_FILELIST] = utils.FingerprintFiles(
520 what[constants.NV_FILELIST])
522 if constants.NV_NODELIST in what:
523 result[constants.NV_NODELIST] = tmp = {}
524 random.shuffle(what[constants.NV_NODELIST])
525 for node in what[constants.NV_NODELIST]:
526 success, message = _GetSshRunner(cluster_name).VerifyNodeHostname(node)
530 if constants.NV_NODENETTEST in what:
531 result[constants.NV_NODENETTEST] = tmp = {}
532 my_pip = my_sip = None
533 for name, pip, sip in what[constants.NV_NODENETTEST]:
539 tmp[my_name] = ("Can't find my own primary/secondary IP"
542 for name, pip, sip in what[constants.NV_NODENETTEST]:
544 if not netutils.TcpPing(pip, port, source=my_pip):
545 fail.append("primary")
547 if not netutils.TcpPing(sip, port, source=my_sip):
548 fail.append("secondary")
550 tmp[name] = ("failure using the %s interface(s)" %
553 if constants.NV_MASTERIP in what:
554 # FIXME: add checks on incoming data structures (here and in the
555 # rest of the function)
556 master_name, master_ip = what[constants.NV_MASTERIP]
557 if master_name == my_name:
558 source = constants.IP4_ADDRESS_LOCALHOST
561 result[constants.NV_MASTERIP] = netutils.TcpPing(master_ip, port,
564 if constants.NV_OOB_PATHS in what:
565 result[constants.NV_OOB_PATHS] = tmp = []
566 for path in what[constants.NV_OOB_PATHS]:
570 tmp.append("error stating out of band helper: %s" % err)
572 if stat.S_ISREG(st.st_mode):
573 if stat.S_IMODE(st.st_mode) & stat.S_IXUSR:
576 tmp.append("out of band helper %s is not executable" % path)
578 tmp.append("out of band helper %s is not a file" % path)
580 if constants.NV_LVLIST in what and vm_capable:
582 val = GetVolumeList(utils.ListVolumeGroups().keys())
585 result[constants.NV_LVLIST] = val
587 if constants.NV_INSTANCELIST in what and vm_capable:
588 # GetInstanceList can fail
590 val = GetInstanceList(what[constants.NV_INSTANCELIST])
593 result[constants.NV_INSTANCELIST] = val
595 if constants.NV_VGLIST in what and vm_capable:
596 result[constants.NV_VGLIST] = utils.ListVolumeGroups()
598 if constants.NV_PVLIST in what and vm_capable:
599 result[constants.NV_PVLIST] = \
600 bdev.LogicalVolume.GetPVInfo(what[constants.NV_PVLIST],
601 filter_allocatable=False)
603 if constants.NV_VERSION in what:
604 result[constants.NV_VERSION] = (constants.PROTOCOL_VERSION,
605 constants.RELEASE_VERSION)
607 if constants.NV_HVINFO in what and vm_capable:
608 hyper = hypervisor.GetHypervisor(what[constants.NV_HVINFO])
609 result[constants.NV_HVINFO] = hyper.GetNodeInfo()
611 if constants.NV_DRBDLIST in what and vm_capable:
613 used_minors = bdev.DRBD8.GetUsedDevs().keys()
614 except errors.BlockDeviceError, err:
615 logging.warning("Can't get used minors list", exc_info=True)
616 used_minors = str(err)
617 result[constants.NV_DRBDLIST] = used_minors
619 if constants.NV_DRBDHELPER in what and vm_capable:
622 payload = bdev.BaseDRBD.GetUsermodeHelper()
623 except errors.BlockDeviceError, err:
624 logging.error("Can't get DRBD usermode helper: %s", str(err))
627 result[constants.NV_DRBDHELPER] = (status, payload)
629 if constants.NV_NODESETUP in what:
630 result[constants.NV_NODESETUP] = tmpr = []
631 if not os.path.isdir("/sys/block") or not os.path.isdir("/sys/class/net"):
632 tmpr.append("The sysfs filesytem doesn't seem to be mounted"
633 " under /sys, missing required directories /sys/block"
634 " and /sys/class/net")
635 if (not os.path.isdir("/proc/sys") or
636 not os.path.isfile("/proc/sysrq-trigger")):
637 tmpr.append("The procfs filesystem doesn't seem to be mounted"
638 " under /proc, missing required directory /proc/sys and"
639 " the file /proc/sysrq-trigger")
641 if constants.NV_TIME in what:
642 result[constants.NV_TIME] = utils.SplitTime(time.time())
644 if constants.NV_OSLIST in what and vm_capable:
645 result[constants.NV_OSLIST] = DiagnoseOS()
647 if constants.NV_BRIDGES in what and vm_capable:
648 result[constants.NV_BRIDGES] = [bridge
649 for bridge in what[constants.NV_BRIDGES]
650 if not utils.BridgeExists(bridge)]
654 def GetBlockDevSizes(devices):
655 """Return the size of the given block devices
658 @param devices: list of block device nodes to query
661 dictionary of all block devices under /dev (key). The value is their
664 {'/dev/disk/by-uuid/123456-12321231-312312-312': 124}
670 for devpath in devices:
671 if os.path.commonprefix([DEV_PREFIX, devpath]) != DEV_PREFIX:
675 st = os.stat(devpath)
676 except EnvironmentError, err:
677 logging.warning("Error stat()'ing device %s: %s", devpath, str(err))
680 if stat.S_ISBLK(st.st_mode):
681 result = utils.RunCmd(["blockdev", "--getsize64", devpath])
683 # We don't want to fail, just do not list this device as available
684 logging.warning("Cannot get size for block device %s", devpath)
687 size = int(result.stdout) / (1024 * 1024)
688 blockdevs[devpath] = size
692 def GetVolumeList(vg_names):
693 """Compute list of logical volumes and their size.
696 @param vg_names: the volume groups whose LVs we should list, or
697 empty for all volume groups
700 dictionary of all partions (key) with value being a tuple of
701 their size (in MiB), inactive and online status::
703 {'xenvg/test1': ('20.06', True, True)}
705 in case of errors, a string is returned with the error
713 result = utils.RunCmd(["lvs", "--noheadings", "--units=m", "--nosuffix",
714 "--separator=%s" % sep,
715 "-ovg_name,lv_name,lv_size,lv_attr"] + vg_names)
717 _Fail("Failed to list logical volumes, lvs output: %s", result.output)
719 for line in result.stdout.splitlines():
721 match = _LVSLINE_REGEX.match(line)
723 logging.error("Invalid line returned from lvs output: '%s'", line)
725 vg_name, name, size, attr = match.groups()
726 inactive = attr[4] == '-'
727 online = attr[5] == 'o'
728 virtual = attr[0] == 'v'
730 # we don't want to report such volumes as existing, since they
731 # don't really hold data
733 lvs[vg_name+"/"+name] = (size, inactive, online)
738 def ListVolumeGroups():
739 """List the volume groups and their size.
742 @return: dictionary with keys volume name and values the
746 return utils.ListVolumeGroups()
750 """List all volumes on this node.
754 A list of dictionaries, each having four keys:
755 - name: the logical volume name,
756 - size: the size of the logical volume
757 - dev: the physical device on which the LV lives
758 - vg: the volume group to which it belongs
760 In case of errors, we return an empty list and log the
763 Note that since a logical volume can live on multiple physical
764 volumes, the resulting list might include a logical volume
768 result = utils.RunCmd(["lvs", "--noheadings", "--units=m", "--nosuffix",
770 "--options=lv_name,lv_size,devices,vg_name"])
772 _Fail("Failed to list logical volumes, lvs output: %s",
776 return dev.split('(')[0]
779 return [parse_dev(x) for x in dev.split(",")]
782 line = [v.strip() for v in line]
783 return [{'name': line[0], 'size': line[1],
784 'dev': dev, 'vg': line[3]} for dev in handle_dev(line[2])]
787 for line in result.stdout.splitlines():
788 if line.count('|') >= 3:
789 all_devs.extend(map_line(line.split('|')))
791 logging.warning("Strange line in the output from lvs: '%s'", line)
795 def BridgesExist(bridges_list):
796 """Check if a list of bridges exist on the current node.
799 @return: C{True} if all of them exist, C{False} otherwise
803 for bridge in bridges_list:
804 if not utils.BridgeExists(bridge):
805 missing.append(bridge)
808 _Fail("Missing bridges %s", utils.CommaJoin(missing))
811 def GetInstanceList(hypervisor_list):
812 """Provides a list of instances.
814 @type hypervisor_list: list
815 @param hypervisor_list: the list of hypervisors to query information
818 @return: a list of all running instances on the current node
819 - instance1.example.com
820 - instance2.example.com
824 for hname in hypervisor_list:
826 names = hypervisor.GetHypervisor(hname).ListInstances()
827 results.extend(names)
828 except errors.HypervisorError, err:
829 _Fail("Error enumerating instances (hypervisor %s): %s",
830 hname, err, exc=True)
835 def GetInstanceInfo(instance, hname):
836 """Gives back the information about an instance as a dictionary.
838 @type instance: string
839 @param instance: the instance name
841 @param hname: the hypervisor type of the instance
844 @return: dictionary with the following keys:
845 - memory: memory size of instance (int)
846 - state: xen state of instance (string)
847 - time: cpu time of instance (float)
852 iinfo = hypervisor.GetHypervisor(hname).GetInstanceInfo(instance)
853 if iinfo is not None:
854 output['memory'] = iinfo[2]
855 output['state'] = iinfo[4]
856 output['time'] = iinfo[5]
861 def GetInstanceMigratable(instance):
862 """Gives whether an instance can be migrated.
864 @type instance: L{objects.Instance}
865 @param instance: object representing the instance to be checked.
868 @return: tuple of (result, description) where:
869 - result: whether the instance can be migrated or not
870 - description: a description of the issue, if relevant
873 hyper = hypervisor.GetHypervisor(instance.hypervisor)
874 iname = instance.name
875 if iname not in hyper.ListInstances():
876 _Fail("Instance %s is not running", iname)
878 for idx in range(len(instance.disks)):
879 link_name = _GetBlockDevSymlinkPath(iname, idx)
880 if not os.path.islink(link_name):
881 logging.warning("Instance %s is missing symlink %s for disk %d",
882 iname, link_name, idx)
885 def GetAllInstancesInfo(hypervisor_list):
886 """Gather data about all instances.
888 This is the equivalent of L{GetInstanceInfo}, except that it
889 computes data for all instances at once, thus being faster if one
890 needs data about more than one instance.
892 @type hypervisor_list: list
893 @param hypervisor_list: list of hypervisors to query for instance data
896 @return: dictionary of instance: data, with data having the following keys:
897 - memory: memory size of instance (int)
898 - state: xen state of instance (string)
899 - time: cpu time of instance (float)
900 - vcpus: the number of vcpus
905 for hname in hypervisor_list:
906 iinfo = hypervisor.GetHypervisor(hname).GetAllInstancesInfo()
908 for name, _, memory, vcpus, state, times in iinfo:
916 # we only check static parameters, like memory and vcpus,
917 # and not state and time which can change between the
918 # invocations of the different hypervisors
919 for key in 'memory', 'vcpus':
920 if value[key] != output[name][key]:
921 _Fail("Instance %s is running twice"
922 " with different parameters", name)
928 def _InstanceLogName(kind, os_name, instance):
929 """Compute the OS log filename for a given instance and operation.
931 The instance name and os name are passed in as strings since not all
932 operations have these as part of an instance object.
935 @param kind: the operation type (e.g. add, import, etc.)
936 @type os_name: string
937 @param os_name: the os name
938 @type instance: string
939 @param instance: the name of the instance being imported/added/etc.
942 # TODO: Use tempfile.mkstemp to create unique filename
943 base = ("%s-%s-%s-%s.log" %
944 (kind, os_name, instance, utils.TimestampForFilename()))
945 return utils.PathJoin(constants.LOG_OS_DIR, base)
948 def InstanceOsAdd(instance, reinstall, debug):
949 """Add an OS to an instance.
951 @type instance: L{objects.Instance}
952 @param instance: Instance whose OS is to be installed
953 @type reinstall: boolean
954 @param reinstall: whether this is an instance reinstall
956 @param debug: debug level, passed to the OS scripts
960 inst_os = OSFromDisk(instance.os)
962 create_env = OSEnvironment(instance, inst_os, debug)
964 create_env['INSTANCE_REINSTALL'] = "1"
966 logfile = _InstanceLogName("add", instance.os, instance.name)
968 result = utils.RunCmd([inst_os.create_script], env=create_env,
969 cwd=inst_os.path, output=logfile,)
971 logging.error("os create command '%s' returned error: %s, logfile: %s,"
972 " output: %s", result.cmd, result.fail_reason, logfile,
974 lines = [utils.SafeEncode(val)
975 for val in utils.TailFile(logfile, lines=20)]
976 _Fail("OS create script failed (%s), last lines in the"
977 " log file:\n%s", result.fail_reason, "\n".join(lines), log=False)
980 def RunRenameInstance(instance, old_name, debug):
981 """Run the OS rename script for an instance.
983 @type instance: L{objects.Instance}
984 @param instance: Instance whose OS is to be installed
985 @type old_name: string
986 @param old_name: previous instance name
988 @param debug: debug level, passed to the OS scripts
990 @return: the success of the operation
993 inst_os = OSFromDisk(instance.os)
995 rename_env = OSEnvironment(instance, inst_os, debug)
996 rename_env['OLD_INSTANCE_NAME'] = old_name
998 logfile = _InstanceLogName("rename", instance.os,
999 "%s-%s" % (old_name, instance.name))
1001 result = utils.RunCmd([inst_os.rename_script], env=rename_env,
1002 cwd=inst_os.path, output=logfile)
1005 logging.error("os create command '%s' returned error: %s output: %s",
1006 result.cmd, result.fail_reason, result.output)
1007 lines = [utils.SafeEncode(val)
1008 for val in utils.TailFile(logfile, lines=20)]
1009 _Fail("OS rename script failed (%s), last lines in the"
1010 " log file:\n%s", result.fail_reason, "\n".join(lines), log=False)
1013 def _GetBlockDevSymlinkPath(instance_name, idx):
1014 return utils.PathJoin(constants.DISK_LINKS_DIR, "%s%s%d" %
1015 (instance_name, constants.DISK_SEPARATOR, idx))
1018 def _SymlinkBlockDev(instance_name, device_path, idx):
1019 """Set up symlinks to a instance's block device.
1021 This is an auxiliary function run when an instance is start (on the primary
1022 node) or when an instance is migrated (on the target node).
1025 @param instance_name: the name of the target instance
1026 @param device_path: path of the physical block device, on the node
1027 @param idx: the disk index
1028 @return: absolute path to the disk's symlink
1031 link_name = _GetBlockDevSymlinkPath(instance_name, idx)
1033 os.symlink(device_path, link_name)
1034 except OSError, err:
1035 if err.errno == errno.EEXIST:
1036 if (not os.path.islink(link_name) or
1037 os.readlink(link_name) != device_path):
1038 os.remove(link_name)
1039 os.symlink(device_path, link_name)
1046 def _RemoveBlockDevLinks(instance_name, disks):
1047 """Remove the block device symlinks belonging to the given instance.
1050 for idx, _ in enumerate(disks):
1051 link_name = _GetBlockDevSymlinkPath(instance_name, idx)
1052 if os.path.islink(link_name):
1054 os.remove(link_name)
1056 logging.exception("Can't remove symlink '%s'", link_name)
1059 def _GatherAndLinkBlockDevs(instance):
1060 """Set up an instance's block device(s).
1062 This is run on the primary node at instance startup. The block
1063 devices must be already assembled.
1065 @type instance: L{objects.Instance}
1066 @param instance: the instance whose disks we shoul assemble
1068 @return: list of (disk_object, device_path)
1072 for idx, disk in enumerate(instance.disks):
1073 device = _RecursiveFindBD(disk)
1075 raise errors.BlockDeviceError("Block device '%s' is not set up." %
1079 link_name = _SymlinkBlockDev(instance.name, device.dev_path, idx)
1081 raise errors.BlockDeviceError("Cannot create block device symlink: %s" %
1084 block_devices.append((disk, link_name))
1086 return block_devices
1089 def StartInstance(instance):
1090 """Start an instance.
1092 @type instance: L{objects.Instance}
1093 @param instance: the instance object
1097 running_instances = GetInstanceList([instance.hypervisor])
1099 if instance.name in running_instances:
1100 logging.info("Instance %s already running, not starting", instance.name)
1104 block_devices = _GatherAndLinkBlockDevs(instance)
1105 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1106 hyper.StartInstance(instance, block_devices)
1107 except errors.BlockDeviceError, err:
1108 _Fail("Block device error: %s", err, exc=True)
1109 except errors.HypervisorError, err:
1110 _RemoveBlockDevLinks(instance.name, instance.disks)
1111 _Fail("Hypervisor error: %s", err, exc=True)
1114 def InstanceShutdown(instance, timeout):
1115 """Shut an instance down.
1117 @note: this functions uses polling with a hardcoded timeout.
1119 @type instance: L{objects.Instance}
1120 @param instance: the instance object
1121 @type timeout: integer
1122 @param timeout: maximum timeout for soft shutdown
1126 hv_name = instance.hypervisor
1127 hyper = hypervisor.GetHypervisor(hv_name)
1128 iname = instance.name
1130 if instance.name not in hyper.ListInstances():
1131 logging.info("Instance %s not running, doing nothing", iname)
1136 self.tried_once = False
1139 if iname not in hyper.ListInstances():
1143 hyper.StopInstance(instance, retry=self.tried_once)
1144 except errors.HypervisorError, err:
1145 if iname not in hyper.ListInstances():
1146 # if the instance is no longer existing, consider this a
1147 # success and go to cleanup
1150 _Fail("Failed to stop instance %s: %s", iname, err)
1152 self.tried_once = True
1154 raise utils.RetryAgain()
1157 utils.Retry(_TryShutdown(), 5, timeout)
1158 except utils.RetryTimeout:
1159 # the shutdown did not succeed
1160 logging.error("Shutdown of '%s' unsuccessful, forcing", iname)
1163 hyper.StopInstance(instance, force=True)
1164 except errors.HypervisorError, err:
1165 if iname in hyper.ListInstances():
1166 # only raise an error if the instance still exists, otherwise
1167 # the error could simply be "instance ... unknown"!
1168 _Fail("Failed to force stop instance %s: %s", iname, err)
1172 if iname in hyper.ListInstances():
1173 _Fail("Could not shutdown instance %s even by destroy", iname)
1176 hyper.CleanupInstance(instance.name)
1177 except errors.HypervisorError, err:
1178 logging.warning("Failed to execute post-shutdown cleanup step: %s", err)
1180 _RemoveBlockDevLinks(iname, instance.disks)
1183 def InstanceReboot(instance, reboot_type, shutdown_timeout):
1184 """Reboot an instance.
1186 @type instance: L{objects.Instance}
1187 @param instance: the instance object to reboot
1188 @type reboot_type: str
1189 @param reboot_type: the type of reboot, one the following
1191 - L{constants.INSTANCE_REBOOT_SOFT}: only reboot the
1192 instance OS, do not recreate the VM
1193 - L{constants.INSTANCE_REBOOT_HARD}: tear down and
1194 restart the VM (at the hypervisor level)
1195 - the other reboot type (L{constants.INSTANCE_REBOOT_FULL}) is
1196 not accepted here, since that mode is handled differently, in
1197 cmdlib, and translates into full stop and start of the
1198 instance (instead of a call_instance_reboot RPC)
1199 @type shutdown_timeout: integer
1200 @param shutdown_timeout: maximum timeout for soft shutdown
1204 running_instances = GetInstanceList([instance.hypervisor])
1206 if instance.name not in running_instances:
1207 _Fail("Cannot reboot instance %s that is not running", instance.name)
1209 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1210 if reboot_type == constants.INSTANCE_REBOOT_SOFT:
1212 hyper.RebootInstance(instance)
1213 except errors.HypervisorError, err:
1214 _Fail("Failed to soft reboot instance %s: %s", instance.name, err)
1215 elif reboot_type == constants.INSTANCE_REBOOT_HARD:
1217 InstanceShutdown(instance, shutdown_timeout)
1218 return StartInstance(instance)
1219 except errors.HypervisorError, err:
1220 _Fail("Failed to hard reboot instance %s: %s", instance.name, err)
1222 _Fail("Invalid reboot_type received: %s", reboot_type)
1225 def MigrationInfo(instance):
1226 """Gather information about an instance to be migrated.
1228 @type instance: L{objects.Instance}
1229 @param instance: the instance definition
1232 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1234 info = hyper.MigrationInfo(instance)
1235 except errors.HypervisorError, err:
1236 _Fail("Failed to fetch migration information: %s", err, exc=True)
1240 def AcceptInstance(instance, info, target):
1241 """Prepare the node to accept an instance.
1243 @type instance: L{objects.Instance}
1244 @param instance: the instance definition
1245 @type info: string/data (opaque)
1246 @param info: migration information, from the source node
1247 @type target: string
1248 @param target: target host (usually ip), on this node
1251 # TODO: why is this required only for DTS_EXT_MIRROR?
1252 if instance.disk_template in constants.DTS_EXT_MIRROR:
1253 # Create the symlinks, as the disks are not active
1256 _GatherAndLinkBlockDevs(instance)
1257 except errors.BlockDeviceError, err:
1258 _Fail("Block device error: %s", err, exc=True)
1260 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1262 hyper.AcceptInstance(instance, info, target)
1263 except errors.HypervisorError, err:
1264 if instance.disk_template in constants.DTS_EXT_MIRROR:
1265 _RemoveBlockDevLinks(instance.name, instance.disks)
1266 _Fail("Failed to accept instance: %s", err, exc=True)
1269 def FinalizeMigration(instance, info, success):
1270 """Finalize any preparation to accept an instance.
1272 @type instance: L{objects.Instance}
1273 @param instance: the instance definition
1274 @type info: string/data (opaque)
1275 @param info: migration information, from the source node
1276 @type success: boolean
1277 @param success: whether the migration was a success or a failure
1280 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1282 hyper.FinalizeMigration(instance, info, success)
1283 except errors.HypervisorError, err:
1284 _Fail("Failed to finalize migration: %s", err, exc=True)
1287 def MigrateInstance(instance, target, live):
1288 """Migrates an instance to another node.
1290 @type instance: L{objects.Instance}
1291 @param instance: the instance definition
1292 @type target: string
1293 @param target: the target node name
1295 @param live: whether the migration should be done live or not (the
1296 interpretation of this parameter is left to the hypervisor)
1298 @return: a tuple of (success, msg) where:
1299 - succes is a boolean denoting the success/failure of the operation
1300 - msg is a string with details in case of failure
1303 hyper = hypervisor.GetHypervisor(instance.hypervisor)
1306 hyper.MigrateInstance(instance, target, live)
1307 except errors.HypervisorError, err:
1308 _Fail("Failed to migrate instance: %s", err, exc=True)
1311 def BlockdevCreate(disk, size, owner, on_primary, info):
1312 """Creates a block device for an instance.
1314 @type disk: L{objects.Disk}
1315 @param disk: the object describing the disk we should create
1317 @param size: the size of the physical underlying device, in MiB
1319 @param owner: the name of the instance for which disk is created,
1320 used for device cache data
1321 @type on_primary: boolean
1322 @param on_primary: indicates if it is the primary node or not
1324 @param info: string that will be sent to the physical device
1325 creation, used for example to set (LVM) tags on LVs
1327 @return: the new unique_id of the device (this can sometime be
1328 computed only after creation), or None. On secondary nodes,
1329 it's not required to return anything.
1332 # TODO: remove the obsolete 'size' argument
1333 # pylint: disable-msg=W0613
1336 for child in disk.children:
1338 crdev = _RecursiveAssembleBD(child, owner, on_primary)
1339 except errors.BlockDeviceError, err:
1340 _Fail("Can't assemble device %s: %s", child, err)
1341 if on_primary or disk.AssembleOnSecondary():
1342 # we need the children open in case the device itself has to
1345 # pylint: disable-msg=E1103
1347 except errors.BlockDeviceError, err:
1348 _Fail("Can't make child '%s' read-write: %s", child, err)
1352 device = bdev.Create(disk.dev_type, disk.physical_id, clist, disk.size)
1353 except errors.BlockDeviceError, err:
1354 _Fail("Can't create block device: %s", err)
1356 if on_primary or disk.AssembleOnSecondary():
1359 except errors.BlockDeviceError, err:
1360 _Fail("Can't assemble device after creation, unusual event: %s", err)
1361 device.SetSyncSpeed(constants.SYNC_SPEED)
1362 if on_primary or disk.OpenOnSecondary():
1364 device.Open(force=True)
1365 except errors.BlockDeviceError, err:
1366 _Fail("Can't make device r/w after creation, unusual event: %s", err)
1367 DevCacheManager.UpdateCache(device.dev_path, owner,
1368 on_primary, disk.iv_name)
1370 device.SetInfo(info)
1372 return device.unique_id
1375 def _WipeDevice(path, offset, size):
1376 """This function actually wipes the device.
1378 @param path: The path to the device to wipe
1379 @param offset: The offset in MiB in the file
1380 @param size: The size in MiB to write
1383 cmd = [constants.DD_CMD, "if=/dev/zero", "seek=%d" % offset,
1384 "bs=%d" % constants.WIPE_BLOCK_SIZE, "oflag=direct", "of=%s" % path,
1386 result = utils.RunCmd(cmd)
1389 _Fail("Wipe command '%s' exited with error: %s; output: %s", result.cmd,
1390 result.fail_reason, result.output)
1393 def BlockdevWipe(disk, offset, size):
1394 """Wipes a block device.
1396 @type disk: L{objects.Disk}
1397 @param disk: the disk object we want to wipe
1399 @param offset: The offset in MiB in the file
1401 @param size: The size in MiB to write
1405 rdev = _RecursiveFindBD(disk)
1406 except errors.BlockDeviceError:
1410 _Fail("Cannot execute wipe for device %s: device not found", disk.iv_name)
1412 # Do cross verify some of the parameters
1413 if offset > rdev.size:
1414 _Fail("Offset is bigger than device size")
1415 if (offset + size) > rdev.size:
1416 _Fail("The provided offset and size to wipe is bigger than device size")
1418 _WipeDevice(rdev.dev_path, offset, size)
1421 def BlockdevPauseResumeSync(disks, pause):
1422 """Pause or resume the sync of the block device.
1424 @type disks: list of L{objects.Disk}
1425 @param disks: the disks object we want to pause/resume
1427 @param pause: Wheater to pause or resume
1433 rdev = _RecursiveFindBD(disk)
1434 except errors.BlockDeviceError:
1438 success.append((False, ("Cannot change sync for device %s:"
1439 " device not found" % disk.iv_name)))
1442 result = rdev.PauseResumeSync(pause)
1445 success.append((result, None))
1451 success.append((result, "%s for device %s failed" % (msg, disk.iv_name)))
1456 def BlockdevRemove(disk):
1457 """Remove a block device.
1459 @note: This is intended to be called recursively.
1461 @type disk: L{objects.Disk}
1462 @param disk: the disk object we should remove
1464 @return: the success of the operation
1469 rdev = _RecursiveFindBD(disk)
1470 except errors.BlockDeviceError, err:
1471 # probably can't attach
1472 logging.info("Can't attach to device %s in remove", disk)
1474 if rdev is not None:
1475 r_path = rdev.dev_path
1478 except errors.BlockDeviceError, err:
1479 msgs.append(str(err))
1481 DevCacheManager.RemoveCache(r_path)
1484 for child in disk.children:
1486 BlockdevRemove(child)
1487 except RPCFail, err:
1488 msgs.append(str(err))
1491 _Fail("; ".join(msgs))
1494 def _RecursiveAssembleBD(disk, owner, as_primary):
1495 """Activate a block device for an instance.
1497 This is run on the primary and secondary nodes for an instance.
1499 @note: this function is called recursively.
1501 @type disk: L{objects.Disk}
1502 @param disk: the disk we try to assemble
1504 @param owner: the name of the instance which owns the disk
1505 @type as_primary: boolean
1506 @param as_primary: if we should make the block device
1509 @return: the assembled device or None (in case no device
1511 @raise errors.BlockDeviceError: in case there is an error
1512 during the activation of the children or the device
1518 mcn = disk.ChildrenNeeded()
1520 mcn = 0 # max number of Nones allowed
1522 mcn = len(disk.children) - mcn # max number of Nones
1523 for chld_disk in disk.children:
1525 cdev = _RecursiveAssembleBD(chld_disk, owner, as_primary)
1526 except errors.BlockDeviceError, err:
1527 if children.count(None) >= mcn:
1530 logging.error("Error in child activation (but continuing): %s",
1532 children.append(cdev)
1534 if as_primary or disk.AssembleOnSecondary():
1535 r_dev = bdev.Assemble(disk.dev_type, disk.physical_id, children, disk.size)
1536 r_dev.SetSyncSpeed(constants.SYNC_SPEED)
1538 if as_primary or disk.OpenOnSecondary():
1540 DevCacheManager.UpdateCache(r_dev.dev_path, owner,
1541 as_primary, disk.iv_name)
1548 def BlockdevAssemble(disk, owner, as_primary, idx):
1549 """Activate a block device for an instance.
1551 This is a wrapper over _RecursiveAssembleBD.
1553 @rtype: str or boolean
1554 @return: a C{/dev/...} path for primary nodes, and
1555 C{True} for secondary nodes
1559 result = _RecursiveAssembleBD(disk, owner, as_primary)
1560 if isinstance(result, bdev.BlockDev):
1561 # pylint: disable-msg=E1103
1562 result = result.dev_path
1564 _SymlinkBlockDev(owner, result, idx)
1565 except errors.BlockDeviceError, err:
1566 _Fail("Error while assembling disk: %s", err, exc=True)
1567 except OSError, err:
1568 _Fail("Error while symlinking disk: %s", err, exc=True)
1573 def BlockdevShutdown(disk):
1574 """Shut down a block device.
1576 First, if the device is assembled (Attach() is successful), then
1577 the device is shutdown. Then the children of the device are
1580 This function is called recursively. Note that we don't cache the
1581 children or such, as oppossed to assemble, shutdown of different
1582 devices doesn't require that the upper device was active.
1584 @type disk: L{objects.Disk}
1585 @param disk: the description of the disk we should
1591 r_dev = _RecursiveFindBD(disk)
1592 if r_dev is not None:
1593 r_path = r_dev.dev_path
1596 DevCacheManager.RemoveCache(r_path)
1597 except errors.BlockDeviceError, err:
1598 msgs.append(str(err))
1601 for child in disk.children:
1603 BlockdevShutdown(child)
1604 except RPCFail, err:
1605 msgs.append(str(err))
1608 _Fail("; ".join(msgs))
1611 def BlockdevAddchildren(parent_cdev, new_cdevs):
1612 """Extend a mirrored block device.
1614 @type parent_cdev: L{objects.Disk}
1615 @param parent_cdev: the disk to which we should add children
1616 @type new_cdevs: list of L{objects.Disk}
1617 @param new_cdevs: the list of children which we should add
1621 parent_bdev = _RecursiveFindBD(parent_cdev)
1622 if parent_bdev is None:
1623 _Fail("Can't find parent device '%s' in add children", parent_cdev)
1624 new_bdevs = [_RecursiveFindBD(disk) for disk in new_cdevs]
1625 if new_bdevs.count(None) > 0:
1626 _Fail("Can't find new device(s) to add: %s:%s", new_bdevs, new_cdevs)
1627 parent_bdev.AddChildren(new_bdevs)
1630 def BlockdevRemovechildren(parent_cdev, new_cdevs):
1631 """Shrink a mirrored block device.
1633 @type parent_cdev: L{objects.Disk}
1634 @param parent_cdev: the disk from which we should remove children
1635 @type new_cdevs: list of L{objects.Disk}
1636 @param new_cdevs: the list of children which we should remove
1640 parent_bdev = _RecursiveFindBD(parent_cdev)
1641 if parent_bdev is None:
1642 _Fail("Can't find parent device '%s' in remove children", parent_cdev)
1644 for disk in new_cdevs:
1645 rpath = disk.StaticDevPath()
1647 bd = _RecursiveFindBD(disk)
1649 _Fail("Can't find device %s while removing children", disk)
1651 devs.append(bd.dev_path)
1653 if not utils.IsNormAbsPath(rpath):
1654 _Fail("Strange path returned from StaticDevPath: '%s'", rpath)
1656 parent_bdev.RemoveChildren(devs)
1659 def BlockdevGetmirrorstatus(disks):
1660 """Get the mirroring status of a list of devices.
1662 @type disks: list of L{objects.Disk}
1663 @param disks: the list of disks which we should query
1665 @return: List of L{objects.BlockDevStatus}, one for each disk
1666 @raise errors.BlockDeviceError: if any of the disks cannot be
1672 rbd = _RecursiveFindBD(dsk)
1674 _Fail("Can't find device %s", dsk)
1676 stats.append(rbd.CombinedSyncStatus())
1681 def BlockdevGetmirrorstatusMulti(disks):
1682 """Get the mirroring status of a list of devices.
1684 @type disks: list of L{objects.Disk}
1685 @param disks: the list of disks which we should query
1687 @return: List of tuples, (bool, status), one for each disk; bool denotes
1688 success/failure, status is L{objects.BlockDevStatus} on success, string
1695 rbd = _RecursiveFindBD(disk)
1697 result.append((False, "Can't find device %s" % disk))
1700 status = rbd.CombinedSyncStatus()
1701 except errors.BlockDeviceError, err:
1702 logging.exception("Error while getting disk status")
1703 result.append((False, str(err)))
1705 result.append((True, status))
1707 assert len(disks) == len(result)
1712 def _RecursiveFindBD(disk):
1713 """Check if a device is activated.
1715 If so, return information about the real device.
1717 @type disk: L{objects.Disk}
1718 @param disk: the disk object we need to find
1720 @return: None if the device can't be found,
1721 otherwise the device instance
1726 for chdisk in disk.children:
1727 children.append(_RecursiveFindBD(chdisk))
1729 return bdev.FindDevice(disk.dev_type, disk.physical_id, children, disk.size)
1732 def _OpenRealBD(disk):
1733 """Opens the underlying block device of a disk.
1735 @type disk: L{objects.Disk}
1736 @param disk: the disk object we want to open
1739 real_disk = _RecursiveFindBD(disk)
1740 if real_disk is None:
1741 _Fail("Block device '%s' is not set up", disk)
1748 def BlockdevFind(disk):
1749 """Check if a device is activated.
1751 If it is, return information about the real device.
1753 @type disk: L{objects.Disk}
1754 @param disk: the disk to find
1755 @rtype: None or objects.BlockDevStatus
1756 @return: None if the disk cannot be found, otherwise a the current
1761 rbd = _RecursiveFindBD(disk)
1762 except errors.BlockDeviceError, err:
1763 _Fail("Failed to find device: %s", err, exc=True)
1768 return rbd.GetSyncStatus()
1771 def BlockdevGetsize(disks):
1772 """Computes the size of the given disks.
1774 If a disk is not found, returns None instead.
1776 @type disks: list of L{objects.Disk}
1777 @param disks: the list of disk to compute the size for
1779 @return: list with elements None if the disk cannot be found,
1786 rbd = _RecursiveFindBD(cf)
1787 except errors.BlockDeviceError:
1793 result.append(rbd.GetActualSize())
1797 def BlockdevExport(disk, dest_node, dest_path, cluster_name):
1798 """Export a block device to a remote node.
1800 @type disk: L{objects.Disk}
1801 @param disk: the description of the disk to export
1802 @type dest_node: str
1803 @param dest_node: the destination node to export to
1804 @type dest_path: str
1805 @param dest_path: the destination path on the target node
1806 @type cluster_name: str
1807 @param cluster_name: the cluster name, needed for SSH hostalias
1811 real_disk = _OpenRealBD(disk)
1813 # the block size on the read dd is 1MiB to match our units
1814 expcmd = utils.BuildShellCmd("set -e; set -o pipefail; "
1815 "dd if=%s bs=1048576 count=%s",
1816 real_disk.dev_path, str(disk.size))
1818 # we set here a smaller block size as, due to ssh buffering, more
1819 # than 64-128k will mostly ignored; we use nocreat to fail if the
1820 # device is not already there or we pass a wrong path; we use
1821 # notrunc to no attempt truncate on an LV device; we use oflag=dsync
1822 # to not buffer too much memory; this means that at best, we flush
1823 # every 64k, which will not be very fast
1824 destcmd = utils.BuildShellCmd("dd of=%s conv=nocreat,notrunc bs=65536"
1825 " oflag=dsync", dest_path)
1827 remotecmd = _GetSshRunner(cluster_name).BuildCmd(dest_node,
1828 constants.GANETI_RUNAS,
1831 # all commands have been checked, so we're safe to combine them
1832 command = '|'.join([expcmd, utils.ShellQuoteArgs(remotecmd)])
1834 result = utils.RunCmd(["bash", "-c", command])
1837 _Fail("Disk copy command '%s' returned error: %s"
1838 " output: %s", command, result.fail_reason, result.output)
1841 def UploadFile(file_name, data, mode, uid, gid, atime, mtime):
1842 """Write a file to the filesystem.
1844 This allows the master to overwrite(!) a file. It will only perform
1845 the operation if the file belongs to a list of configuration files.
1847 @type file_name: str
1848 @param file_name: the target file name
1850 @param data: the new contents of the file
1852 @param mode: the mode to give the file (can be None)
1854 @param uid: the owner of the file (can be -1 for default)
1856 @param gid: the group of the file (can be -1 for default)
1858 @param atime: the atime to set on the file (can be None)
1860 @param mtime: the mtime to set on the file (can be None)
1864 if not os.path.isabs(file_name):
1865 _Fail("Filename passed to UploadFile is not absolute: '%s'", file_name)
1867 if file_name not in _ALLOWED_UPLOAD_FILES:
1868 _Fail("Filename passed to UploadFile not in allowed upload targets: '%s'",
1871 raw_data = _Decompress(data)
1873 utils.SafeWriteFile(file_name, None,
1874 data=raw_data, mode=mode, uid=uid, gid=gid,
1875 atime=atime, mtime=mtime)
1878 def RunOob(oob_program, command, node, timeout):
1879 """Executes oob_program with given command on given node.
1881 @param oob_program: The path to the executable oob_program
1882 @param command: The command to invoke on oob_program
1883 @param node: The node given as an argument to the program
1884 @param timeout: Timeout after which we kill the oob program
1887 @raise RPCFail: If execution fails for some reason
1890 result = utils.RunCmd([oob_program, command, node], timeout=timeout)
1893 _Fail("'%s' failed with reason '%s'; output: %s", result.cmd,
1894 result.fail_reason, result.output)
1896 return result.stdout
1899 def WriteSsconfFiles(values):
1900 """Update all ssconf files.
1902 Wrapper around the SimpleStore.WriteFiles.
1905 ssconf.SimpleStore().WriteFiles(values)
1908 def _ErrnoOrStr(err):
1909 """Format an EnvironmentError exception.
1911 If the L{err} argument has an errno attribute, it will be looked up
1912 and converted into a textual C{E...} description. Otherwise the
1913 string representation of the error will be returned.
1915 @type err: L{EnvironmentError}
1916 @param err: the exception to format
1919 if hasattr(err, 'errno'):
1920 detail = errno.errorcode[err.errno]
1926 def _OSOndiskAPIVersion(os_dir):
1927 """Compute and return the API version of a given OS.
1929 This function will try to read the API version of the OS residing in
1930 the 'os_dir' directory.
1933 @param os_dir: the directory in which we should look for the OS
1935 @return: tuple (status, data) with status denoting the validity and
1936 data holding either the vaid versions or an error message
1939 api_file = utils.PathJoin(os_dir, constants.OS_API_FILE)
1942 st = os.stat(api_file)
1943 except EnvironmentError, err:
1944 return False, ("Required file '%s' not found under path %s: %s" %
1945 (constants.OS_API_FILE, os_dir, _ErrnoOrStr(err)))
1947 if not stat.S_ISREG(stat.S_IFMT(st.st_mode)):
1948 return False, ("File '%s' in %s is not a regular file" %
1949 (constants.OS_API_FILE, os_dir))
1952 api_versions = utils.ReadFile(api_file).splitlines()
1953 except EnvironmentError, err:
1954 return False, ("Error while reading the API version file at %s: %s" %
1955 (api_file, _ErrnoOrStr(err)))
1958 api_versions = [int(version.strip()) for version in api_versions]
1959 except (TypeError, ValueError), err:
1960 return False, ("API version(s) can't be converted to integer: %s" %
1963 return True, api_versions
1966 def DiagnoseOS(top_dirs=None):
1967 """Compute the validity for all OSes.
1969 @type top_dirs: list
1970 @param top_dirs: the list of directories in which to
1971 search (if not given defaults to
1972 L{constants.OS_SEARCH_PATH})
1973 @rtype: list of L{objects.OS}
1974 @return: a list of tuples (name, path, status, diagnose, variants,
1975 parameters, api_version) for all (potential) OSes under all
1976 search paths, where:
1977 - name is the (potential) OS name
1978 - path is the full path to the OS
1979 - status True/False is the validity of the OS
1980 - diagnose is the error message for an invalid OS, otherwise empty
1981 - variants is a list of supported OS variants, if any
1982 - parameters is a list of (name, help) parameters, if any
1983 - api_version is a list of support OS API versions
1986 if top_dirs is None:
1987 top_dirs = constants.OS_SEARCH_PATH
1990 for dir_name in top_dirs:
1991 if os.path.isdir(dir_name):
1993 f_names = utils.ListVisibleFiles(dir_name)
1994 except EnvironmentError, err:
1995 logging.exception("Can't list the OS directory %s: %s", dir_name, err)
1997 for name in f_names:
1998 os_path = utils.PathJoin(dir_name, name)
1999 status, os_inst = _TryOSFromDisk(name, base_dir=dir_name)
2002 variants = os_inst.supported_variants
2003 parameters = os_inst.supported_parameters
2004 api_versions = os_inst.api_versions
2007 variants = parameters = api_versions = []
2008 result.append((name, os_path, status, diagnose, variants,
2009 parameters, api_versions))
2014 def _TryOSFromDisk(name, base_dir=None):
2015 """Create an OS instance from disk.
2017 This function will return an OS instance if the given name is a
2020 @type base_dir: string
2021 @keyword base_dir: Base directory containing OS installations.
2022 Defaults to a search in all the OS_SEARCH_PATH dirs.
2024 @return: success and either the OS instance if we find a valid one,
2028 if base_dir is None:
2029 os_dir = utils.FindFile(name, constants.OS_SEARCH_PATH, os.path.isdir)
2031 os_dir = utils.FindFile(name, [base_dir], os.path.isdir)
2034 return False, "Directory for OS %s not found in search path" % name
2036 status, api_versions = _OSOndiskAPIVersion(os_dir)
2039 return status, api_versions
2041 if not constants.OS_API_VERSIONS.intersection(api_versions):
2042 return False, ("API version mismatch for path '%s': found %s, want %s." %
2043 (os_dir, api_versions, constants.OS_API_VERSIONS))
2045 # OS Files dictionary, we will populate it with the absolute path names
2046 os_files = dict.fromkeys(constants.OS_SCRIPTS)
2048 if max(api_versions) >= constants.OS_API_V15:
2049 os_files[constants.OS_VARIANTS_FILE] = ''
2051 if max(api_versions) >= constants.OS_API_V20:
2052 os_files[constants.OS_PARAMETERS_FILE] = ''
2054 del os_files[constants.OS_SCRIPT_VERIFY]
2056 for filename in os_files:
2057 os_files[filename] = utils.PathJoin(os_dir, filename)
2060 st = os.stat(os_files[filename])
2061 except EnvironmentError, err:
2062 return False, ("File '%s' under path '%s' is missing (%s)" %
2063 (filename, os_dir, _ErrnoOrStr(err)))
2065 if not stat.S_ISREG(stat.S_IFMT(st.st_mode)):
2066 return False, ("File '%s' under path '%s' is not a regular file" %
2069 if filename in constants.OS_SCRIPTS:
2070 if stat.S_IMODE(st.st_mode) & stat.S_IXUSR != stat.S_IXUSR:
2071 return False, ("File '%s' under path '%s' is not executable" %
2075 if constants.OS_VARIANTS_FILE in os_files:
2076 variants_file = os_files[constants.OS_VARIANTS_FILE]
2078 variants = utils.ReadFile(variants_file).splitlines()
2079 except EnvironmentError, err:
2080 return False, ("Error while reading the OS variants file at %s: %s" %
2081 (variants_file, _ErrnoOrStr(err)))
2083 return False, ("No supported os variant found")
2086 if constants.OS_PARAMETERS_FILE in os_files:
2087 parameters_file = os_files[constants.OS_PARAMETERS_FILE]
2089 parameters = utils.ReadFile(parameters_file).splitlines()
2090 except EnvironmentError, err:
2091 return False, ("Error while reading the OS parameters file at %s: %s" %
2092 (parameters_file, _ErrnoOrStr(err)))
2093 parameters = [v.split(None, 1) for v in parameters]
2095 os_obj = objects.OS(name=name, path=os_dir,
2096 create_script=os_files[constants.OS_SCRIPT_CREATE],
2097 export_script=os_files[constants.OS_SCRIPT_EXPORT],
2098 import_script=os_files[constants.OS_SCRIPT_IMPORT],
2099 rename_script=os_files[constants.OS_SCRIPT_RENAME],
2100 verify_script=os_files.get(constants.OS_SCRIPT_VERIFY,
2102 supported_variants=variants,
2103 supported_parameters=parameters,
2104 api_versions=api_versions)
2108 def OSFromDisk(name, base_dir=None):
2109 """Create an OS instance from disk.
2111 This function will return an OS instance if the given name is a
2112 valid OS name. Otherwise, it will raise an appropriate
2113 L{RPCFail} exception, detailing why this is not a valid OS.
2115 This is just a wrapper over L{_TryOSFromDisk}, which doesn't raise
2116 an exception but returns true/false status data.
2118 @type base_dir: string
2119 @keyword base_dir: Base directory containing OS installations.
2120 Defaults to a search in all the OS_SEARCH_PATH dirs.
2121 @rtype: L{objects.OS}
2122 @return: the OS instance if we find a valid one
2123 @raise RPCFail: if we don't find a valid OS
2126 name_only = objects.OS.GetName(name)
2127 status, payload = _TryOSFromDisk(name_only, base_dir)
2135 def OSCoreEnv(os_name, inst_os, os_params, debug=0):
2136 """Calculate the basic environment for an os script.
2139 @param os_name: full operating system name (including variant)
2140 @type inst_os: L{objects.OS}
2141 @param inst_os: operating system for which the environment is being built
2142 @type os_params: dict
2143 @param os_params: the OS parameters
2144 @type debug: integer
2145 @param debug: debug level (0 or 1, for OS Api 10)
2147 @return: dict of environment variables
2148 @raise errors.BlockDeviceError: if the block device
2154 max(constants.OS_API_VERSIONS.intersection(inst_os.api_versions))
2155 result['OS_API_VERSION'] = '%d' % api_version
2156 result['OS_NAME'] = inst_os.name
2157 result['DEBUG_LEVEL'] = '%d' % debug
2160 if api_version >= constants.OS_API_V15:
2161 variant = objects.OS.GetVariant(os_name)
2163 variant = inst_os.supported_variants[0]
2164 result['OS_VARIANT'] = variant
2167 for pname, pvalue in os_params.items():
2168 result['OSP_%s' % pname.upper()] = pvalue
2173 def OSEnvironment(instance, inst_os, debug=0):
2174 """Calculate the environment for an os script.
2176 @type instance: L{objects.Instance}
2177 @param instance: target instance for the os script run
2178 @type inst_os: L{objects.OS}
2179 @param inst_os: operating system for which the environment is being built
2180 @type debug: integer
2181 @param debug: debug level (0 or 1, for OS Api 10)
2183 @return: dict of environment variables
2184 @raise errors.BlockDeviceError: if the block device
2188 result = OSCoreEnv(instance.os, inst_os, instance.osparams, debug=debug)
2190 for attr in ["name", "os", "uuid", "ctime", "mtime", "primary_node"]:
2191 result["INSTANCE_%s" % attr.upper()] = str(getattr(instance, attr))
2193 result['HYPERVISOR'] = instance.hypervisor
2194 result['DISK_COUNT'] = '%d' % len(instance.disks)
2195 result['NIC_COUNT'] = '%d' % len(instance.nics)
2196 result['INSTANCE_SECONDARY_NODES'] = \
2197 ('%s' % " ".join(instance.secondary_nodes))
2200 for idx, disk in enumerate(instance.disks):
2201 real_disk = _OpenRealBD(disk)
2202 result['DISK_%d_PATH' % idx] = real_disk.dev_path
2203 result['DISK_%d_ACCESS' % idx] = disk.mode
2204 if constants.HV_DISK_TYPE in instance.hvparams:
2205 result['DISK_%d_FRONTEND_TYPE' % idx] = \
2206 instance.hvparams[constants.HV_DISK_TYPE]
2207 if disk.dev_type in constants.LDS_BLOCK:
2208 result['DISK_%d_BACKEND_TYPE' % idx] = 'block'
2209 elif disk.dev_type == constants.LD_FILE:
2210 result['DISK_%d_BACKEND_TYPE' % idx] = \
2211 'file:%s' % disk.physical_id[0]
2214 for idx, nic in enumerate(instance.nics):
2215 result['NIC_%d_MAC' % idx] = nic.mac
2217 result['NIC_%d_IP' % idx] = nic.ip
2218 result['NIC_%d_MODE' % idx] = nic.nicparams[constants.NIC_MODE]
2219 if nic.nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
2220 result['NIC_%d_BRIDGE' % idx] = nic.nicparams[constants.NIC_LINK]
2221 if nic.nicparams[constants.NIC_LINK]:
2222 result['NIC_%d_LINK' % idx] = nic.nicparams[constants.NIC_LINK]
2223 if constants.HV_NIC_TYPE in instance.hvparams:
2224 result['NIC_%d_FRONTEND_TYPE' % idx] = \
2225 instance.hvparams[constants.HV_NIC_TYPE]
2228 for source, kind in [(instance.beparams, "BE"), (instance.hvparams, "HV")]:
2229 for key, value in source.items():
2230 result["INSTANCE_%s_%s" % (kind, key)] = str(value)
2235 def BlockdevGrow(disk, amount, dryrun):
2236 """Grow a stack of block devices.
2238 This function is called recursively, with the childrens being the
2239 first ones to resize.
2241 @type disk: L{objects.Disk}
2242 @param disk: the disk to be grown
2243 @type amount: integer
2244 @param amount: the amount (in mebibytes) to grow with
2245 @type dryrun: boolean
2246 @param dryrun: whether to execute the operation in simulation mode
2247 only, without actually increasing the size
2248 @rtype: (status, result)
2249 @return: a tuple with the status of the operation (True/False), and
2250 the errors message if status is False
2253 r_dev = _RecursiveFindBD(disk)
2255 _Fail("Cannot find block device %s", disk)
2258 r_dev.Grow(amount, dryrun)
2259 except errors.BlockDeviceError, err:
2260 _Fail("Failed to grow block device: %s", err, exc=True)
2263 def BlockdevSnapshot(disk):
2264 """Create a snapshot copy of a block device.
2266 This function is called recursively, and the snapshot is actually created
2267 just for the leaf lvm backend device.
2269 @type disk: L{objects.Disk}
2270 @param disk: the disk to be snapshotted
2272 @return: snapshot disk ID as (vg, lv)
2275 if disk.dev_type == constants.LD_DRBD8:
2276 if not disk.children:
2277 _Fail("DRBD device '%s' without backing storage cannot be snapshotted",
2279 return BlockdevSnapshot(disk.children[0])
2280 elif disk.dev_type == constants.LD_LV:
2281 r_dev = _RecursiveFindBD(disk)
2282 if r_dev is not None:
2283 # FIXME: choose a saner value for the snapshot size
2284 # let's stay on the safe side and ask for the full size, for now
2285 return r_dev.Snapshot(disk.size)
2287 _Fail("Cannot find block device %s", disk)
2289 _Fail("Cannot snapshot non-lvm block device '%s' of type '%s'",
2290 disk.unique_id, disk.dev_type)
2293 def FinalizeExport(instance, snap_disks):
2294 """Write out the export configuration information.
2296 @type instance: L{objects.Instance}
2297 @param instance: the instance which we export, used for
2298 saving configuration
2299 @type snap_disks: list of L{objects.Disk}
2300 @param snap_disks: list of snapshot block devices, which
2301 will be used to get the actual name of the dump file
2306 destdir = utils.PathJoin(constants.EXPORT_DIR, instance.name + ".new")
2307 finaldestdir = utils.PathJoin(constants.EXPORT_DIR, instance.name)
2309 config = objects.SerializableConfigParser()
2311 config.add_section(constants.INISECT_EXP)
2312 config.set(constants.INISECT_EXP, 'version', '0')
2313 config.set(constants.INISECT_EXP, 'timestamp', '%d' % int(time.time()))
2314 config.set(constants.INISECT_EXP, 'source', instance.primary_node)
2315 config.set(constants.INISECT_EXP, 'os', instance.os)
2316 config.set(constants.INISECT_EXP, "compression", "none")
2318 config.add_section(constants.INISECT_INS)
2319 config.set(constants.INISECT_INS, 'name', instance.name)
2320 config.set(constants.INISECT_INS, 'memory', '%d' %
2321 instance.beparams[constants.BE_MEMORY])
2322 config.set(constants.INISECT_INS, 'vcpus', '%d' %
2323 instance.beparams[constants.BE_VCPUS])
2324 config.set(constants.INISECT_INS, 'disk_template', instance.disk_template)
2325 config.set(constants.INISECT_INS, 'hypervisor', instance.hypervisor)
2328 for nic_count, nic in enumerate(instance.nics):
2330 config.set(constants.INISECT_INS, 'nic%d_mac' %
2331 nic_count, '%s' % nic.mac)
2332 config.set(constants.INISECT_INS, 'nic%d_ip' % nic_count, '%s' % nic.ip)
2333 for param in constants.NICS_PARAMETER_TYPES:
2334 config.set(constants.INISECT_INS, 'nic%d_%s' % (nic_count, param),
2335 '%s' % nic.nicparams.get(param, None))
2336 # TODO: redundant: on load can read nics until it doesn't exist
2337 config.set(constants.INISECT_INS, 'nic_count' , '%d' % nic_total)
2340 for disk_count, disk in enumerate(snap_disks):
2343 config.set(constants.INISECT_INS, 'disk%d_ivname' % disk_count,
2344 ('%s' % disk.iv_name))
2345 config.set(constants.INISECT_INS, 'disk%d_dump' % disk_count,
2346 ('%s' % disk.physical_id[1]))
2347 config.set(constants.INISECT_INS, 'disk%d_size' % disk_count,
2350 config.set(constants.INISECT_INS, 'disk_count' , '%d' % disk_total)
2352 # New-style hypervisor/backend parameters
2354 config.add_section(constants.INISECT_HYP)
2355 for name, value in instance.hvparams.items():
2356 if name not in constants.HVC_GLOBALS:
2357 config.set(constants.INISECT_HYP, name, str(value))
2359 config.add_section(constants.INISECT_BEP)
2360 for name, value in instance.beparams.items():
2361 config.set(constants.INISECT_BEP, name, str(value))
2363 config.add_section(constants.INISECT_OSP)
2364 for name, value in instance.osparams.items():
2365 config.set(constants.INISECT_OSP, name, str(value))
2367 utils.WriteFile(utils.PathJoin(destdir, constants.EXPORT_CONF_FILE),
2368 data=config.Dumps())
2369 shutil.rmtree(finaldestdir, ignore_errors=True)
2370 shutil.move(destdir, finaldestdir)
2373 def ExportInfo(dest):
2374 """Get export configuration information.
2377 @param dest: directory containing the export
2379 @rtype: L{objects.SerializableConfigParser}
2380 @return: a serializable config file containing the
2384 cff = utils.PathJoin(dest, constants.EXPORT_CONF_FILE)
2386 config = objects.SerializableConfigParser()
2389 if (not config.has_section(constants.INISECT_EXP) or
2390 not config.has_section(constants.INISECT_INS)):
2391 _Fail("Export info file doesn't have the required fields")
2393 return config.Dumps()
2397 """Return a list of exports currently available on this machine.
2400 @return: list of the exports
2403 if os.path.isdir(constants.EXPORT_DIR):
2404 return sorted(utils.ListVisibleFiles(constants.EXPORT_DIR))
2406 _Fail("No exports directory")
2409 def RemoveExport(export):
2410 """Remove an existing export from the node.
2413 @param export: the name of the export to remove
2417 target = utils.PathJoin(constants.EXPORT_DIR, export)
2420 shutil.rmtree(target)
2421 except EnvironmentError, err:
2422 _Fail("Error while removing the export: %s", err, exc=True)
2425 def BlockdevRename(devlist):
2426 """Rename a list of block devices.
2428 @type devlist: list of tuples
2429 @param devlist: list of tuples of the form (disk,
2430 new_logical_id, new_physical_id); disk is an
2431 L{objects.Disk} object describing the current disk,
2432 and new logical_id/physical_id is the name we
2435 @return: True if all renames succeeded, False otherwise
2440 for disk, unique_id in devlist:
2441 dev = _RecursiveFindBD(disk)
2443 msgs.append("Can't find device %s in rename" % str(disk))
2447 old_rpath = dev.dev_path
2448 dev.Rename(unique_id)
2449 new_rpath = dev.dev_path
2450 if old_rpath != new_rpath:
2451 DevCacheManager.RemoveCache(old_rpath)
2452 # FIXME: we should add the new cache information here, like:
2453 # DevCacheManager.UpdateCache(new_rpath, owner, ...)
2454 # but we don't have the owner here - maybe parse from existing
2455 # cache? for now, we only lose lvm data when we rename, which
2456 # is less critical than DRBD or MD
2457 except errors.BlockDeviceError, err:
2458 msgs.append("Can't rename device '%s' to '%s': %s" %
2459 (dev, unique_id, err))
2460 logging.exception("Can't rename device '%s' to '%s'", dev, unique_id)
2463 _Fail("; ".join(msgs))
2466 def _TransformFileStorageDir(fs_dir):
2467 """Checks whether given file_storage_dir is valid.
2469 Checks wheter the given fs_dir is within the cluster-wide default
2470 file_storage_dir or the shared_file_storage_dir, which are stored in
2471 SimpleStore. Only paths under those directories are allowed.
2474 @param fs_dir: the path to check
2476 @return: the normalized path if valid, None otherwise
2479 if not constants.ENABLE_FILE_STORAGE:
2480 _Fail("File storage disabled at configure time")
2482 fs_dir = os.path.normpath(fs_dir)
2483 base_fstore = cfg.GetFileStorageDir()
2484 base_shared = cfg.GetSharedFileStorageDir()
2485 if ((os.path.commonprefix([fs_dir, base_fstore]) != base_fstore) and
2486 (os.path.commonprefix([fs_dir, base_shared]) != base_shared)):
2487 _Fail("File storage directory '%s' is not under base file"
2488 " storage directory '%s' or shared storage directory '%s'",
2489 fs_dir, base_fstore, base_shared)
2493 def CreateFileStorageDir(file_storage_dir):
2494 """Create file storage directory.
2496 @type file_storage_dir: str
2497 @param file_storage_dir: directory to create
2500 @return: tuple with first element a boolean indicating wheter dir
2501 creation was successful or not
2504 file_storage_dir = _TransformFileStorageDir(file_storage_dir)
2505 if os.path.exists(file_storage_dir):
2506 if not os.path.isdir(file_storage_dir):
2507 _Fail("Specified storage dir '%s' is not a directory",
2511 os.makedirs(file_storage_dir, 0750)
2512 except OSError, err:
2513 _Fail("Cannot create file storage directory '%s': %s",
2514 file_storage_dir, err, exc=True)
2517 def RemoveFileStorageDir(file_storage_dir):
2518 """Remove file storage directory.
2520 Remove it only if it's empty. If not log an error and return.
2522 @type file_storage_dir: str
2523 @param file_storage_dir: the directory we should cleanup
2524 @rtype: tuple (success,)
2525 @return: tuple of one element, C{success}, denoting
2526 whether the operation was successful
2529 file_storage_dir = _TransformFileStorageDir(file_storage_dir)
2530 if os.path.exists(file_storage_dir):
2531 if not os.path.isdir(file_storage_dir):
2532 _Fail("Specified Storage directory '%s' is not a directory",
2534 # deletes dir only if empty, otherwise we want to fail the rpc call
2536 os.rmdir(file_storage_dir)
2537 except OSError, err:
2538 _Fail("Cannot remove file storage directory '%s': %s",
2539 file_storage_dir, err)
2542 def RenameFileStorageDir(old_file_storage_dir, new_file_storage_dir):
2543 """Rename the file storage directory.
2545 @type old_file_storage_dir: str
2546 @param old_file_storage_dir: the current path
2547 @type new_file_storage_dir: str
2548 @param new_file_storage_dir: the name we should rename to
2549 @rtype: tuple (success,)
2550 @return: tuple of one element, C{success}, denoting
2551 whether the operation was successful
2554 old_file_storage_dir = _TransformFileStorageDir(old_file_storage_dir)
2555 new_file_storage_dir = _TransformFileStorageDir(new_file_storage_dir)
2556 if not os.path.exists(new_file_storage_dir):
2557 if os.path.isdir(old_file_storage_dir):
2559 os.rename(old_file_storage_dir, new_file_storage_dir)
2560 except OSError, err:
2561 _Fail("Cannot rename '%s' to '%s': %s",
2562 old_file_storage_dir, new_file_storage_dir, err)
2564 _Fail("Specified storage dir '%s' is not a directory",
2565 old_file_storage_dir)
2567 if os.path.exists(old_file_storage_dir):
2568 _Fail("Cannot rename '%s' to '%s': both locations exist",
2569 old_file_storage_dir, new_file_storage_dir)
2572 def _EnsureJobQueueFile(file_name):
2573 """Checks whether the given filename is in the queue directory.
2575 @type file_name: str
2576 @param file_name: the file name we should check
2578 @raises RPCFail: if the file is not valid
2581 queue_dir = os.path.normpath(constants.QUEUE_DIR)
2582 result = (os.path.commonprefix([queue_dir, file_name]) == queue_dir)
2585 _Fail("Passed job queue file '%s' does not belong to"
2586 " the queue directory '%s'", file_name, queue_dir)
2589 def JobQueueUpdate(file_name, content):
2590 """Updates a file in the queue directory.
2592 This is just a wrapper over L{utils.io.WriteFile}, with proper
2595 @type file_name: str
2596 @param file_name: the job file name
2598 @param content: the new job contents
2600 @return: the success of the operation
2603 _EnsureJobQueueFile(file_name)
2604 getents = runtime.GetEnts()
2606 # Write and replace the file atomically
2607 utils.WriteFile(file_name, data=_Decompress(content), uid=getents.masterd_uid,
2608 gid=getents.masterd_gid)
2611 def JobQueueRename(old, new):
2612 """Renames a job queue file.
2614 This is just a wrapper over os.rename with proper checking.
2617 @param old: the old (actual) file name
2619 @param new: the desired file name
2621 @return: the success of the operation and payload
2624 _EnsureJobQueueFile(old)
2625 _EnsureJobQueueFile(new)
2627 utils.RenameFile(old, new, mkdir=True)
2630 def BlockdevClose(instance_name, disks):
2631 """Closes the given block devices.
2633 This means they will be switched to secondary mode (in case of
2636 @param instance_name: if the argument is not empty, the symlinks
2637 of this instance will be removed
2638 @type disks: list of L{objects.Disk}
2639 @param disks: the list of disks to be closed
2640 @rtype: tuple (success, message)
2641 @return: a tuple of success and message, where success
2642 indicates the succes of the operation, and message
2643 which will contain the error details in case we
2649 rd = _RecursiveFindBD(cf)
2651 _Fail("Can't find device %s", cf)
2658 except errors.BlockDeviceError, err:
2659 msg.append(str(err))
2661 _Fail("Can't make devices secondary: %s", ",".join(msg))
2664 _RemoveBlockDevLinks(instance_name, disks)
2667 def ValidateHVParams(hvname, hvparams):
2668 """Validates the given hypervisor parameters.
2670 @type hvname: string
2671 @param hvname: the hypervisor name
2672 @type hvparams: dict
2673 @param hvparams: the hypervisor parameters to be validated
2678 hv_type = hypervisor.GetHypervisor(hvname)
2679 hv_type.ValidateParameters(hvparams)
2680 except errors.HypervisorError, err:
2681 _Fail(str(err), log=False)
2684 def _CheckOSPList(os_obj, parameters):
2685 """Check whether a list of parameters is supported by the OS.
2687 @type os_obj: L{objects.OS}
2688 @param os_obj: OS object to check
2689 @type parameters: list
2690 @param parameters: the list of parameters to check
2693 supported = [v[0] for v in os_obj.supported_parameters]
2694 delta = frozenset(parameters).difference(supported)
2696 _Fail("The following parameters are not supported"
2697 " by the OS %s: %s" % (os_obj.name, utils.CommaJoin(delta)))
2700 def ValidateOS(required, osname, checks, osparams):
2701 """Validate the given OS' parameters.
2703 @type required: boolean
2704 @param required: whether absence of the OS should translate into
2706 @type osname: string
2707 @param osname: the OS to be validated
2709 @param checks: list of the checks to run (currently only 'parameters')
2710 @type osparams: dict
2711 @param osparams: dictionary with OS parameters
2713 @return: True if the validation passed, or False if the OS was not
2714 found and L{required} was false
2717 if not constants.OS_VALIDATE_CALLS.issuperset(checks):
2718 _Fail("Unknown checks required for OS %s: %s", osname,
2719 set(checks).difference(constants.OS_VALIDATE_CALLS))
2721 name_only = objects.OS.GetName(osname)
2722 status, tbv = _TryOSFromDisk(name_only, None)
2730 if max(tbv.api_versions) < constants.OS_API_V20:
2733 if constants.OS_VALIDATE_PARAMETERS in checks:
2734 _CheckOSPList(tbv, osparams.keys())
2736 validate_env = OSCoreEnv(osname, tbv, osparams)
2737 result = utils.RunCmd([tbv.verify_script] + checks, env=validate_env,
2740 logging.error("os validate command '%s' returned error: %s output: %s",
2741 result.cmd, result.fail_reason, result.output)
2742 _Fail("OS validation script failed (%s), output: %s",
2743 result.fail_reason, result.output, log=False)
2749 """Demotes the current node from master candidate role.
2752 # try to ensure we're not the master by mistake
2753 master, myself = ssconf.GetMasterAndMyself()
2754 if master == myself:
2755 _Fail("ssconf status shows I'm the master node, will not demote")
2757 result = utils.RunCmd([constants.DAEMON_UTIL, "check", constants.MASTERD])
2758 if not result.failed:
2759 _Fail("The master daemon is running, will not demote")
2762 if os.path.isfile(constants.CLUSTER_CONF_FILE):
2763 utils.CreateBackup(constants.CLUSTER_CONF_FILE)
2764 except EnvironmentError, err:
2765 if err.errno != errno.ENOENT:
2766 _Fail("Error while backing up cluster file: %s", err, exc=True)
2768 utils.RemoveFile(constants.CLUSTER_CONF_FILE)
2771 def _GetX509Filenames(cryptodir, name):
2772 """Returns the full paths for the private key and certificate.
2775 return (utils.PathJoin(cryptodir, name),
2776 utils.PathJoin(cryptodir, name, _X509_KEY_FILE),
2777 utils.PathJoin(cryptodir, name, _X509_CERT_FILE))
2780 def CreateX509Certificate(validity, cryptodir=constants.CRYPTO_KEYS_DIR):
2781 """Creates a new X509 certificate for SSL/TLS.
2784 @param validity: Validity in seconds
2785 @rtype: tuple; (string, string)
2786 @return: Certificate name and public part
2789 (key_pem, cert_pem) = \
2790 utils.GenerateSelfSignedX509Cert(netutils.Hostname.GetSysName(),
2791 min(validity, _MAX_SSL_CERT_VALIDITY))
2793 cert_dir = tempfile.mkdtemp(dir=cryptodir,
2794 prefix="x509-%s-" % utils.TimestampForFilename())
2796 name = os.path.basename(cert_dir)
2797 assert len(name) > 5
2799 (_, key_file, cert_file) = _GetX509Filenames(cryptodir, name)
2801 utils.WriteFile(key_file, mode=0400, data=key_pem)
2802 utils.WriteFile(cert_file, mode=0400, data=cert_pem)
2804 # Never return private key as it shouldn't leave the node
2805 return (name, cert_pem)
2807 shutil.rmtree(cert_dir, ignore_errors=True)
2811 def RemoveX509Certificate(name, cryptodir=constants.CRYPTO_KEYS_DIR):
2812 """Removes a X509 certificate.
2815 @param name: Certificate name
2818 (cert_dir, key_file, cert_file) = _GetX509Filenames(cryptodir, name)
2820 utils.RemoveFile(key_file)
2821 utils.RemoveFile(cert_file)
2825 except EnvironmentError, err:
2826 _Fail("Cannot remove certificate directory '%s': %s",
2830 def _GetImportExportIoCommand(instance, mode, ieio, ieargs):
2831 """Returns the command for the requested input/output.
2833 @type instance: L{objects.Instance}
2834 @param instance: The instance object
2835 @param mode: Import/export mode
2836 @param ieio: Input/output type
2837 @param ieargs: Input/output arguments
2840 assert mode in (constants.IEM_IMPORT, constants.IEM_EXPORT)
2847 if ieio == constants.IEIO_FILE:
2848 (filename, ) = ieargs
2850 if not utils.IsNormAbsPath(filename):
2851 _Fail("Path '%s' is not normalized or absolute", filename)
2853 directory = os.path.normpath(os.path.dirname(filename))
2855 if (os.path.commonprefix([constants.EXPORT_DIR, directory]) !=
2856 constants.EXPORT_DIR):
2857 _Fail("File '%s' is not under exports directory '%s'",
2858 filename, constants.EXPORT_DIR)
2861 utils.Makedirs(directory, mode=0750)
2863 quoted_filename = utils.ShellQuote(filename)
2865 if mode == constants.IEM_IMPORT:
2866 suffix = "> %s" % quoted_filename
2867 elif mode == constants.IEM_EXPORT:
2868 suffix = "< %s" % quoted_filename
2870 # Retrieve file size
2872 st = os.stat(filename)
2873 except EnvironmentError, err:
2874 logging.error("Can't stat(2) %s: %s", filename, err)
2876 exp_size = utils.BytesToMebibyte(st.st_size)
2878 elif ieio == constants.IEIO_RAW_DISK:
2881 real_disk = _OpenRealBD(disk)
2883 if mode == constants.IEM_IMPORT:
2884 # we set here a smaller block size as, due to transport buffering, more
2885 # than 64-128k will mostly ignored; we use nocreat to fail if the device
2886 # is not already there or we pass a wrong path; we use notrunc to no
2887 # attempt truncate on an LV device; we use oflag=dsync to not buffer too
2888 # much memory; this means that at best, we flush every 64k, which will
2890 suffix = utils.BuildShellCmd(("| dd of=%s conv=nocreat,notrunc"
2891 " bs=%s oflag=dsync"),
2895 elif mode == constants.IEM_EXPORT:
2896 # the block size on the read dd is 1MiB to match our units
2897 prefix = utils.BuildShellCmd("dd if=%s bs=%s count=%s |",
2899 str(1024 * 1024), # 1 MB
2901 exp_size = disk.size
2903 elif ieio == constants.IEIO_SCRIPT:
2904 (disk, disk_index, ) = ieargs
2906 assert isinstance(disk_index, (int, long))
2908 real_disk = _OpenRealBD(disk)
2910 inst_os = OSFromDisk(instance.os)
2911 env = OSEnvironment(instance, inst_os)
2913 if mode == constants.IEM_IMPORT:
2914 env["IMPORT_DEVICE"] = env["DISK_%d_PATH" % disk_index]
2915 env["IMPORT_INDEX"] = str(disk_index)
2916 script = inst_os.import_script
2918 elif mode == constants.IEM_EXPORT:
2919 env["EXPORT_DEVICE"] = real_disk.dev_path
2920 env["EXPORT_INDEX"] = str(disk_index)
2921 script = inst_os.export_script
2923 # TODO: Pass special environment only to script
2924 script_cmd = utils.BuildShellCmd("( cd %s && %s; )", inst_os.path, script)
2926 if mode == constants.IEM_IMPORT:
2927 suffix = "| %s" % script_cmd
2929 elif mode == constants.IEM_EXPORT:
2930 prefix = "%s |" % script_cmd
2932 # Let script predict size
2933 exp_size = constants.IE_CUSTOM_SIZE
2936 _Fail("Invalid %s I/O mode %r", mode, ieio)
2938 return (env, prefix, suffix, exp_size)
2941 def _CreateImportExportStatusDir(prefix):
2942 """Creates status directory for import/export.
2945 return tempfile.mkdtemp(dir=constants.IMPORT_EXPORT_DIR,
2947 (prefix, utils.TimestampForFilename())))
2950 def StartImportExportDaemon(mode, opts, host, port, instance, ieio, ieioargs):
2951 """Starts an import or export daemon.
2953 @param mode: Import/output mode
2954 @type opts: L{objects.ImportExportOptions}
2955 @param opts: Daemon options
2957 @param host: Remote host for export (None for import)
2959 @param port: Remote port for export (None for import)
2960 @type instance: L{objects.Instance}
2961 @param instance: Instance object
2962 @param ieio: Input/output type
2963 @param ieioargs: Input/output arguments
2966 if mode == constants.IEM_IMPORT:
2969 if not (host is None and port is None):
2970 _Fail("Can not specify host or port on import")
2972 elif mode == constants.IEM_EXPORT:
2975 if host is None or port is None:
2976 _Fail("Host and port must be specified for an export")
2979 _Fail("Invalid mode %r", mode)
2981 if (opts.key_name is None) ^ (opts.ca_pem is None):
2982 _Fail("Cluster certificate can only be used for both key and CA")
2984 (cmd_env, cmd_prefix, cmd_suffix, exp_size) = \
2985 _GetImportExportIoCommand(instance, mode, ieio, ieioargs)
2987 if opts.key_name is None:
2989 key_path = constants.NODED_CERT_FILE
2990 cert_path = constants.NODED_CERT_FILE
2991 assert opts.ca_pem is None
2993 (_, key_path, cert_path) = _GetX509Filenames(constants.CRYPTO_KEYS_DIR,
2995 assert opts.ca_pem is not None
2997 for i in [key_path, cert_path]:
2998 if not os.path.exists(i):
2999 _Fail("File '%s' does not exist" % i)
3001 status_dir = _CreateImportExportStatusDir(prefix)
3003 status_file = utils.PathJoin(status_dir, _IES_STATUS_FILE)
3004 pid_file = utils.PathJoin(status_dir, _IES_PID_FILE)
3005 ca_file = utils.PathJoin(status_dir, _IES_CA_FILE)
3007 if opts.ca_pem is None:
3009 ca = utils.ReadFile(constants.NODED_CERT_FILE)
3014 utils.WriteFile(ca_file, data=ca, mode=0400)
3017 constants.IMPORT_EXPORT_DAEMON,
3019 "--key=%s" % key_path,
3020 "--cert=%s" % cert_path,
3021 "--ca=%s" % ca_file,
3025 cmd.append("--host=%s" % host)
3028 cmd.append("--port=%s" % port)
3031 cmd.append("--ipv6")
3033 cmd.append("--ipv4")
3036 cmd.append("--compress=%s" % opts.compress)
3039 cmd.append("--magic=%s" % opts.magic)
3041 if exp_size is not None:
3042 cmd.append("--expected-size=%s" % exp_size)
3045 cmd.append("--cmd-prefix=%s" % cmd_prefix)
3048 cmd.append("--cmd-suffix=%s" % cmd_suffix)
3050 if mode == constants.IEM_EXPORT:
3051 # Retry connection a few times when connecting to remote peer
3052 cmd.append("--connect-retries=%s" % constants.RIE_CONNECT_RETRIES)
3053 cmd.append("--connect-timeout=%s" % constants.RIE_CONNECT_ATTEMPT_TIMEOUT)
3054 elif opts.connect_timeout is not None:
3055 assert mode == constants.IEM_IMPORT
3056 # Overall timeout for establishing connection while listening
3057 cmd.append("--connect-timeout=%s" % opts.connect_timeout)
3059 logfile = _InstanceLogName(prefix, instance.os, instance.name)
3061 # TODO: Once _InstanceLogName uses tempfile.mkstemp, StartDaemon has
3062 # support for receiving a file descriptor for output
3063 utils.StartDaemon(cmd, env=cmd_env, pidfile=pid_file,
3066 # The import/export name is simply the status directory name
3067 return os.path.basename(status_dir)
3070 shutil.rmtree(status_dir, ignore_errors=True)
3074 def GetImportExportStatus(names):
3075 """Returns import/export daemon status.
3077 @type names: sequence
3078 @param names: List of names
3079 @rtype: List of dicts
3080 @return: Returns a list of the state of each named import/export or None if a
3081 status couldn't be read
3087 status_file = utils.PathJoin(constants.IMPORT_EXPORT_DIR, name,
3091 data = utils.ReadFile(status_file)
3092 except EnvironmentError, err:
3093 if err.errno != errno.ENOENT:
3101 result.append(serializer.LoadJson(data))
3106 def AbortImportExport(name):
3107 """Sends SIGTERM to a running import/export daemon.
3110 logging.info("Abort import/export %s", name)
3112 status_dir = utils.PathJoin(constants.IMPORT_EXPORT_DIR, name)
3113 pid = utils.ReadLockedPidFile(utils.PathJoin(status_dir, _IES_PID_FILE))
3116 logging.info("Import/export %s is running with PID %s, sending SIGTERM",
3118 utils.IgnoreProcessNotFound(os.kill, pid, signal.SIGTERM)
3121 def CleanupImportExport(name):
3122 """Cleanup after an import or export.
3124 If the import/export daemon is still running it's killed. Afterwards the
3125 whole status directory is removed.
3128 logging.info("Finalizing import/export %s", name)
3130 status_dir = utils.PathJoin(constants.IMPORT_EXPORT_DIR, name)
3132 pid = utils.ReadLockedPidFile(utils.PathJoin(status_dir, _IES_PID_FILE))
3135 logging.info("Import/export %s is still running with PID %s",
3137 utils.KillProcess(pid, waitpid=False)
3139 shutil.rmtree(status_dir, ignore_errors=True)
3142 def _FindDisks(nodes_ip, disks):
3143 """Sets the physical ID on disks and returns the block devices.
3146 # set the correct physical ID
3147 my_name = netutils.Hostname.GetSysName()
3149 cf.SetPhysicalID(my_name, nodes_ip)
3154 rd = _RecursiveFindBD(cf)
3156 _Fail("Can't find device %s", cf)
3161 def DrbdDisconnectNet(nodes_ip, disks):
3162 """Disconnects the network on a list of drbd devices.
3165 bdevs = _FindDisks(nodes_ip, disks)
3171 except errors.BlockDeviceError, err:
3172 _Fail("Can't change network configuration to standalone mode: %s",
3176 def DrbdAttachNet(nodes_ip, disks, instance_name, multimaster):
3177 """Attaches the network on a list of drbd devices.
3180 bdevs = _FindDisks(nodes_ip, disks)
3183 for idx, rd in enumerate(bdevs):
3185 _SymlinkBlockDev(instance_name, rd.dev_path, idx)
3186 except EnvironmentError, err:
3187 _Fail("Can't create symlink: %s", err)
3188 # reconnect disks, switch to new master configuration and if
3189 # needed primary mode
3192 rd.AttachNet(multimaster)
3193 except errors.BlockDeviceError, err:
3194 _Fail("Can't change network configuration: %s", err)
3196 # wait until the disks are connected; we need to retry the re-attach
3197 # if the device becomes standalone, as this might happen if the one
3198 # node disconnects and reconnects in a different mode before the
3199 # other node reconnects; in this case, one or both of the nodes will
3200 # decide it has wrong configuration and switch to standalone
3203 all_connected = True
3206 stats = rd.GetProcStatus()
3208 all_connected = (all_connected and
3209 (stats.is_connected or stats.is_in_resync))
3211 if stats.is_standalone:
3212 # peer had different config info and this node became
3213 # standalone, even though this should not happen with the
3214 # new staged way of changing disk configs
3216 rd.AttachNet(multimaster)
3217 except errors.BlockDeviceError, err:
3218 _Fail("Can't change network configuration: %s", err)
3220 if not all_connected:
3221 raise utils.RetryAgain()
3224 # Start with a delay of 100 miliseconds and go up to 5 seconds
3225 utils.Retry(_Attach, (0.1, 1.5, 5.0), 2 * 60)
3226 except utils.RetryTimeout:
3227 _Fail("Timeout in disk reconnecting")
3230 # change to primary mode
3234 except errors.BlockDeviceError, err:
3235 _Fail("Can't change to primary mode: %s", err)
3238 def DrbdWaitSync(nodes_ip, disks):
3239 """Wait until DRBDs have synchronized.
3243 stats = rd.GetProcStatus()
3244 if not (stats.is_connected or stats.is_in_resync):
3245 raise utils.RetryAgain()
3248 bdevs = _FindDisks(nodes_ip, disks)
3254 # poll each second for 15 seconds
3255 stats = utils.Retry(_helper, 1, 15, args=[rd])
3256 except utils.RetryTimeout:
3257 stats = rd.GetProcStatus()
3259 if not (stats.is_connected or stats.is_in_resync):
3260 _Fail("DRBD device %s is not in sync: stats=%s", rd, stats)
3261 alldone = alldone and (not stats.is_in_resync)
3262 if stats.sync_percent is not None:
3263 min_resync = min(min_resync, stats.sync_percent)
3265 return (alldone, min_resync)
3268 def GetDrbdUsermodeHelper():
3269 """Returns DRBD usermode helper currently configured.
3273 return bdev.BaseDRBD.GetUsermodeHelper()
3274 except errors.BlockDeviceError, err:
3278 def PowercycleNode(hypervisor_type):
3279 """Hard-powercycle the node.
3281 Because we need to return first, and schedule the powercycle in the
3282 background, we won't be able to report failures nicely.
3285 hyper = hypervisor.GetHypervisor(hypervisor_type)
3289 # if we can't fork, we'll pretend that we're in the child process
3292 return "Reboot scheduled in 5 seconds"
3293 # ensure the child is running on ram
3296 except Exception: # pylint: disable-msg=W0703
3299 hyper.PowercycleNode()
3302 class HooksRunner(object):
3305 This class is instantiated on the node side (ganeti-noded) and not
3309 def __init__(self, hooks_base_dir=None):
3310 """Constructor for hooks runner.
3312 @type hooks_base_dir: str or None
3313 @param hooks_base_dir: if not None, this overrides the
3314 L{constants.HOOKS_BASE_DIR} (useful for unittests)
3317 if hooks_base_dir is None:
3318 hooks_base_dir = constants.HOOKS_BASE_DIR
3319 # yeah, _BASE_DIR is not valid for attributes, we use it like a
3321 self._BASE_DIR = hooks_base_dir # pylint: disable-msg=C0103
3323 def RunHooks(self, hpath, phase, env):
3324 """Run the scripts in the hooks directory.
3327 @param hpath: the path to the hooks directory which
3330 @param phase: either L{constants.HOOKS_PHASE_PRE} or
3331 L{constants.HOOKS_PHASE_POST}
3333 @param env: dictionary with the environment for the hook
3335 @return: list of 3-element tuples:
3337 - script result, either L{constants.HKR_SUCCESS} or
3338 L{constants.HKR_FAIL}
3339 - output of the script
3341 @raise errors.ProgrammerError: for invalid input
3345 if phase == constants.HOOKS_PHASE_PRE:
3347 elif phase == constants.HOOKS_PHASE_POST:
3350 _Fail("Unknown hooks phase '%s'", phase)
3353 subdir = "%s-%s.d" % (hpath, suffix)
3354 dir_name = utils.PathJoin(self._BASE_DIR, subdir)
3358 if not os.path.isdir(dir_name):
3359 # for non-existing/non-dirs, we simply exit instead of logging a
3360 # warning at every operation
3363 runparts_results = utils.RunParts(dir_name, env=env, reset_env=True)
3365 for (relname, relstatus, runresult) in runparts_results:
3366 if relstatus == constants.RUNPARTS_SKIP:
3367 rrval = constants.HKR_SKIP
3369 elif relstatus == constants.RUNPARTS_ERR:
3370 rrval = constants.HKR_FAIL
3371 output = "Hook script execution error: %s" % runresult
3372 elif relstatus == constants.RUNPARTS_RUN:
3373 if runresult.failed:
3374 rrval = constants.HKR_FAIL
3376 rrval = constants.HKR_SUCCESS
3377 output = utils.SafeEncode(runresult.output.strip())
3378 results.append(("%s/%s" % (subdir, relname), rrval, output))
3383 class IAllocatorRunner(object):
3384 """IAllocator runner.
3386 This class is instantiated on the node side (ganeti-noded) and not on
3391 def Run(name, idata):
3392 """Run an iallocator script.
3395 @param name: the iallocator script name
3397 @param idata: the allocator input data
3400 @return: two element tuple of:
3402 - either error message or stdout of allocator (for success)
3405 alloc_script = utils.FindFile(name, constants.IALLOCATOR_SEARCH_PATH,
3407 if alloc_script is None:
3408 _Fail("iallocator module '%s' not found in the search path", name)
3410 fd, fin_name = tempfile.mkstemp(prefix="ganeti-iallocator.")
3414 result = utils.RunCmd([alloc_script, fin_name])
3416 _Fail("iallocator module '%s' failed: %s, output '%s'",
3417 name, result.fail_reason, result.output)
3421 return result.stdout
3424 class DevCacheManager(object):
3425 """Simple class for managing a cache of block device information.
3428 _DEV_PREFIX = "/dev/"
3429 _ROOT_DIR = constants.BDEV_CACHE_DIR
3432 def _ConvertPath(cls, dev_path):
3433 """Converts a /dev/name path to the cache file name.
3435 This replaces slashes with underscores and strips the /dev
3436 prefix. It then returns the full path to the cache file.
3439 @param dev_path: the C{/dev/} path name
3441 @return: the converted path name
3444 if dev_path.startswith(cls._DEV_PREFIX):
3445 dev_path = dev_path[len(cls._DEV_PREFIX):]
3446 dev_path = dev_path.replace("/", "_")
3447 fpath = utils.PathJoin(cls._ROOT_DIR, "bdev_%s" % dev_path)
3451 def UpdateCache(cls, dev_path, owner, on_primary, iv_name):
3452 """Updates the cache information for a given device.
3455 @param dev_path: the pathname of the device
3457 @param owner: the owner (instance name) of the device
3458 @type on_primary: bool
3459 @param on_primary: whether this is the primary
3462 @param iv_name: the instance-visible name of the
3463 device, as in objects.Disk.iv_name
3468 if dev_path is None:
3469 logging.error("DevCacheManager.UpdateCache got a None dev_path")
3471 fpath = cls._ConvertPath(dev_path)
3477 iv_name = "not_visible"
3478 fdata = "%s %s %s\n" % (str(owner), state, iv_name)
3480 utils.WriteFile(fpath, data=fdata)
3481 except EnvironmentError, err:
3482 logging.exception("Can't update bdev cache for %s: %s", dev_path, err)
3485 def RemoveCache(cls, dev_path):
3486 """Remove data for a dev_path.
3488 This is just a wrapper over L{utils.io.RemoveFile} with a converted
3489 path name and logging.
3492 @param dev_path: the pathname of the device
3497 if dev_path is None:
3498 logging.error("DevCacheManager.RemoveCache got a None dev_path")
3500 fpath = cls._ConvertPath(dev_path)
3502 utils.RemoveFile(fpath)
3503 except EnvironmentError, err:
3504 logging.exception("Can't update bdev cache for %s: %s", dev_path, err)