4 # Copyright (C) 2006, 2007, 2008, 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 to bootstrap a new cluster.
32 from ganeti import rpc
33 from ganeti import ssh
34 from ganeti import utils
35 from ganeti import errors
36 from ganeti import config
37 from ganeti import constants
38 from ganeti import objects
39 from ganeti import ssconf
40 from ganeti import serializer
41 from ganeti import hypervisor
42 from ganeti import bdev
43 from ganeti import netutils
44 from ganeti import backend
45 from ganeti import luxi
46 from ganeti import jstore
49 # ec_id for InitConfig's temporary reservation manager
50 _INITCONF_ECID = "initconfig-ecid"
52 #: After how many seconds daemon must be responsive
53 _DAEMON_READY_TIMEOUT = 10.0
57 """Setup the SSH configuration for the cluster.
59 This generates a dsa keypair for root, adds the pub key to the
60 permitted hosts and adds the hostkey to its own known hosts.
63 priv_key, pub_key, auth_keys = ssh.GetUserFiles(constants.GANETI_RUNAS)
65 for name in priv_key, pub_key:
66 if os.path.exists(name):
67 utils.CreateBackup(name)
68 utils.RemoveFile(name)
70 result = utils.RunCmd(["ssh-keygen", "-t", "dsa",
74 raise errors.OpExecError("Could not generate ssh keypair, error %s" %
77 utils.AddAuthorizedKey(auth_keys, utils.ReadFile(pub_key))
80 def GenerateHmacKey(file_name):
81 """Writes a new HMAC key.
84 @param file_name: Path to output file
87 utils.WriteFile(file_name, data="%s\n" % utils.GenerateSecret(), mode=0400,
91 def GenerateClusterCrypto(new_cluster_cert, new_rapi_cert, new_confd_hmac_key,
92 new_cds, rapi_cert_pem=None, cds=None,
93 nodecert_file=constants.NODED_CERT_FILE,
94 rapicert_file=constants.RAPI_CERT_FILE,
95 hmackey_file=constants.CONFD_HMAC_KEY,
96 cds_file=constants.CLUSTER_DOMAIN_SECRET_FILE):
97 """Updates the cluster certificates, keys and secrets.
99 @type new_cluster_cert: bool
100 @param new_cluster_cert: Whether to generate a new cluster certificate
101 @type new_rapi_cert: bool
102 @param new_rapi_cert: Whether to generate a new RAPI certificate
103 @type new_confd_hmac_key: bool
104 @param new_confd_hmac_key: Whether to generate a new HMAC key
106 @param new_cds: Whether to generate a new cluster domain secret
107 @type rapi_cert_pem: string
108 @param rapi_cert_pem: New RAPI certificate in PEM format
110 @param cds: New cluster domain secret
111 @type nodecert_file: string
112 @param nodecert_file: optional override of the node cert file path
113 @type rapicert_file: string
114 @param rapicert_file: optional override of the rapi cert file path
115 @type hmackey_file: string
116 @param hmackey_file: optional override of the hmac key file path
119 # noded SSL certificate
120 cluster_cert_exists = os.path.exists(nodecert_file)
121 if new_cluster_cert or not cluster_cert_exists:
122 if cluster_cert_exists:
123 utils.CreateBackup(nodecert_file)
125 logging.debug("Generating new cluster certificate at %s", nodecert_file)
126 utils.GenerateSelfSignedSslCert(nodecert_file)
129 if new_confd_hmac_key or not os.path.exists(hmackey_file):
130 logging.debug("Writing new confd HMAC key to %s", hmackey_file)
131 GenerateHmacKey(hmackey_file)
134 rapi_cert_exists = os.path.exists(rapicert_file)
137 # Assume rapi_pem contains a valid PEM-formatted certificate and key
138 logging.debug("Writing RAPI certificate at %s", rapicert_file)
139 utils.WriteFile(rapicert_file, data=rapi_cert_pem, backup=True)
141 elif new_rapi_cert or not rapi_cert_exists:
143 utils.CreateBackup(rapicert_file)
145 logging.debug("Generating new RAPI certificate at %s", rapicert_file)
146 utils.GenerateSelfSignedSslCert(rapicert_file)
148 # Cluster domain secret
150 logging.debug("Writing cluster domain secret to %s", cds_file)
151 utils.WriteFile(cds_file, data=cds, backup=True)
153 elif new_cds or not os.path.exists(cds_file):
154 logging.debug("Generating new cluster domain secret at %s", cds_file)
155 GenerateHmacKey(cds_file)
158 def _InitGanetiServerSetup(master_name):
159 """Setup the necessary configuration for the initial node daemon.
161 This creates the nodepass file containing the shared password for
162 the cluster, generates the SSL certificate and starts the node daemon.
164 @type master_name: str
165 @param master_name: Name of the master node
168 # Generate cluster secrets
169 GenerateClusterCrypto(True, False, False, False)
171 result = utils.RunCmd([constants.DAEMON_UTIL, "start", constants.NODED])
173 raise errors.OpExecError("Could not start the node daemon, command %s"
174 " had exitcode %s and error %s" %
175 (result.cmd, result.exit_code, result.output))
177 _WaitForNodeDaemon(master_name)
180 def _WaitForNodeDaemon(node_name):
181 """Wait for node daemon to become responsive.
184 def _CheckNodeDaemon():
185 result = rpc.RpcRunner.call_version([node_name])[node_name]
187 raise utils.RetryAgain()
190 utils.Retry(_CheckNodeDaemon, 1.0, _DAEMON_READY_TIMEOUT)
191 except utils.RetryTimeout:
192 raise errors.OpExecError("Node daemon on %s didn't answer queries within"
193 " %s seconds" % (node_name, _DAEMON_READY_TIMEOUT))
196 def _WaitForMasterDaemon():
197 """Wait for master daemon to become responsive.
200 def _CheckMasterDaemon():
203 (cluster_name, ) = cl.QueryConfigValues(["cluster_name"])
205 raise utils.RetryAgain()
207 logging.debug("Received cluster name %s from master", cluster_name)
210 utils.Retry(_CheckMasterDaemon, 1.0, _DAEMON_READY_TIMEOUT)
211 except utils.RetryTimeout:
212 raise errors.OpExecError("Master daemon didn't answer queries within"
213 " %s seconds" % _DAEMON_READY_TIMEOUT)
216 def _InitFileStorage(file_storage_dir):
217 """Initialize if needed the file storage.
219 @param file_storage_dir: the user-supplied value
220 @return: either empty string (if file storage was disabled at build
221 time) or the normalized path to the storage directory
224 if not constants.ENABLE_FILE_STORAGE:
227 file_storage_dir = os.path.normpath(file_storage_dir)
229 if not os.path.isabs(file_storage_dir):
230 raise errors.OpPrereqError("The file storage directory you passed is"
231 " not an absolute path.", errors.ECODE_INVAL)
233 if not os.path.exists(file_storage_dir):
235 os.makedirs(file_storage_dir, 0750)
237 raise errors.OpPrereqError("Cannot create file storage directory"
238 " '%s': %s" % (file_storage_dir, err),
239 errors.ECODE_ENVIRON)
241 if not os.path.isdir(file_storage_dir):
242 raise errors.OpPrereqError("The file storage directory '%s' is not"
243 " a directory." % file_storage_dir,
244 errors.ECODE_ENVIRON)
245 return file_storage_dir
248 def _InitSharedFileStorage(shared_file_storage_dir):
249 """Initialize if needed the shared file storage.
251 @param shared_file_storage_dir: the user-supplied value
252 @return: either empty string (if file storage was disabled at build
253 time) or the normalized path to the storage directory
256 if not constants.ENABLE_SHARED_FILE_STORAGE:
259 shared_file_storage_dir = os.path.normpath(shared_file_storage_dir)
261 if not os.path.isabs(shared_file_storage_dir):
262 raise errors.OpPrereqError("The shared file storage directory you"
263 " passed is not an absolute path.",
266 if not os.path.exists(shared_file_storage_dir):
268 os.makedirs(shared_file_storage_dir, 0750)
270 raise errors.OpPrereqError("Cannot create file storage directory"
271 " '%s': %s" % (shared_file_storage_dir, err),
272 errors.ECODE_ENVIRON)
274 if not os.path.isdir(shared_file_storage_dir):
275 raise errors.OpPrereqError("The file storage directory '%s' is not"
276 " a directory." % shared_file_storage_dir,
277 errors.ECODE_ENVIRON)
278 return shared_file_storage_dir
281 def InitCluster(cluster_name, mac_prefix, # pylint: disable-msg=R0913
282 master_netdev, file_storage_dir, shared_file_storage_dir,
283 candidate_pool_size, secondary_ip=None, vg_name=None,
284 beparams=None, nicparams=None, ndparams=None, hvparams=None,
285 enabled_hypervisors=None, modify_etc_hosts=True,
286 modify_ssh_setup=True, maintain_node_health=False,
287 drbd_helper=None, uid_pool=None, default_iallocator=None,
288 primary_ip_version=None, prealloc_wipe_disks=False):
289 """Initialise the cluster.
291 @type candidate_pool_size: int
292 @param candidate_pool_size: master candidate pool size
295 # TODO: complete the docstring
296 if config.ConfigWriter.IsCluster():
297 raise errors.OpPrereqError("Cluster is already initialised",
300 if not enabled_hypervisors:
301 raise errors.OpPrereqError("Enabled hypervisors list must contain at"
302 " least one member", errors.ECODE_INVAL)
303 invalid_hvs = set(enabled_hypervisors) - constants.HYPER_TYPES
305 raise errors.OpPrereqError("Enabled hypervisors contains invalid"
306 " entries: %s" % invalid_hvs,
311 if primary_ip_version == constants.IP4_VERSION:
312 ipcls = netutils.IP4Address
313 elif primary_ip_version == constants.IP6_VERSION:
314 ipcls = netutils.IP6Address
316 raise errors.OpPrereqError("Invalid primary ip version: %d." %
319 hostname = netutils.GetHostname(family=ipcls.family)
320 if not ipcls.IsValid(hostname.ip):
321 raise errors.OpPrereqError("This host's IP (%s) is not a valid IPv%d"
322 " address." % (hostname.ip, primary_ip_version))
324 if ipcls.IsLoopback(hostname.ip):
325 raise errors.OpPrereqError("This host's IP (%s) resolves to a loopback"
326 " address. Please fix DNS or %s." %
327 (hostname.ip, constants.ETC_HOSTS),
328 errors.ECODE_ENVIRON)
330 if not ipcls.Own(hostname.ip):
331 raise errors.OpPrereqError("Inconsistency: this host's name resolves"
332 " to %s,\nbut this ip address does not"
333 " belong to this host" %
334 hostname.ip, errors.ECODE_ENVIRON)
336 clustername = netutils.GetHostname(name=cluster_name, family=ipcls.family)
338 if netutils.TcpPing(clustername.ip, constants.DEFAULT_NODED_PORT, timeout=5):
339 raise errors.OpPrereqError("Cluster IP already active",
340 errors.ECODE_NOTUNIQUE)
343 if primary_ip_version == constants.IP6_VERSION:
344 raise errors.OpPrereqError("When using a IPv6 primary address, a valid"
345 " IPv4 address must be given as secondary",
347 secondary_ip = hostname.ip
349 if not netutils.IP4Address.IsValid(secondary_ip):
350 raise errors.OpPrereqError("Secondary IP address (%s) has to be a valid"
351 " IPv4 address." % secondary_ip,
354 if not netutils.IP4Address.Own(secondary_ip):
355 raise errors.OpPrereqError("You gave %s as secondary IP,"
356 " but it does not belong to this host." %
357 secondary_ip, errors.ECODE_ENVIRON)
359 if vg_name is not None:
360 # Check if volume group is valid
361 vgstatus = utils.CheckVolumeGroupSize(utils.ListVolumeGroups(), vg_name,
362 constants.MIN_VG_SIZE)
364 raise errors.OpPrereqError("Error: %s\nspecify --no-lvm-storage if"
365 " you are not using lvm" % vgstatus,
368 if drbd_helper is not None:
370 curr_helper = bdev.BaseDRBD.GetUsermodeHelper()
371 except errors.BlockDeviceError, err:
372 raise errors.OpPrereqError("Error while checking drbd helper"
373 " (specify --no-drbd-storage if you are not"
374 " using drbd): %s" % str(err),
375 errors.ECODE_ENVIRON)
376 if drbd_helper != curr_helper:
377 raise errors.OpPrereqError("Error: requiring %s as drbd helper but %s"
378 " is the current helper" % (drbd_helper,
382 file_storage_dir = _InitFileStorage(file_storage_dir)
383 shared_file_storage_dir = _InitSharedFileStorage(shared_file_storage_dir)
385 if not re.match("^[0-9a-z]{2}:[0-9a-z]{2}:[0-9a-z]{2}$", mac_prefix):
386 raise errors.OpPrereqError("Invalid mac prefix given '%s'" % mac_prefix,
389 result = utils.RunCmd(["ip", "link", "show", "dev", master_netdev])
391 raise errors.OpPrereqError("Invalid master netdev given (%s): '%s'" %
393 result.output.strip()), errors.ECODE_INVAL)
395 dirs = [(constants.RUN_GANETI_DIR, constants.RUN_DIRS_MODE)]
396 utils.EnsureDirs(dirs)
398 utils.ForceDictType(beparams, constants.BES_PARAMETER_TYPES)
399 utils.ForceDictType(nicparams, constants.NICS_PARAMETER_TYPES)
400 objects.NIC.CheckParameterSyntax(nicparams)
402 if ndparams is not None:
403 utils.ForceDictType(ndparams, constants.NDS_PARAMETER_TYPES)
405 ndparams = dict(constants.NDC_DEFAULTS)
407 # hvparams is a mapping of hypervisor->hvparams dict
408 for hv_name, hv_params in hvparams.iteritems():
409 utils.ForceDictType(hv_params, constants.HVS_PARAMETER_TYPES)
410 hv_class = hypervisor.GetHypervisor(hv_name)
411 hv_class.CheckParameterSyntax(hv_params)
413 # set up ssh config and /etc/hosts
414 sshline = utils.ReadFile(constants.SSH_HOST_RSA_PUB)
415 sshkey = sshline.split(" ")[1]
418 utils.AddHostToEtcHosts(hostname.name, hostname.ip)
423 if default_iallocator is not None:
424 alloc_script = utils.FindFile(default_iallocator,
425 constants.IALLOCATOR_SEARCH_PATH,
427 if alloc_script is None:
428 raise errors.OpPrereqError("Invalid default iallocator script '%s'"
429 " specified" % default_iallocator,
431 elif constants.HTOOLS:
432 # htools was enabled at build-time, we default to it
433 if utils.FindFile(constants.IALLOC_HAIL,
434 constants.IALLOCATOR_SEARCH_PATH,
436 default_iallocator = constants.IALLOC_HAIL
440 # init of cluster config file
441 cluster_config = objects.Cluster(
443 rsahostkeypub=sshkey,
444 highest_used_port=(constants.FIRST_DRBD_PORT - 1),
445 mac_prefix=mac_prefix,
446 volume_group_name=vg_name,
447 tcpudp_port_pool=set(),
448 master_node=hostname.name,
449 master_ip=clustername.ip,
450 master_netdev=master_netdev,
451 cluster_name=clustername.name,
452 file_storage_dir=file_storage_dir,
453 shared_file_storage_dir=shared_file_storage_dir,
454 enabled_hypervisors=enabled_hypervisors,
455 beparams={constants.PP_DEFAULT: beparams},
456 nicparams={constants.PP_DEFAULT: nicparams},
459 candidate_pool_size=candidate_pool_size,
460 modify_etc_hosts=modify_etc_hosts,
461 modify_ssh_setup=modify_ssh_setup,
465 maintain_node_health=maintain_node_health,
466 drbd_usermode_helper=drbd_helper,
467 default_iallocator=default_iallocator,
468 primary_ip_family=ipcls.family,
469 prealloc_wipe_disks=prealloc_wipe_disks,
471 master_node_config = objects.Node(name=hostname.name,
472 primary_ip=hostname.ip,
473 secondary_ip=secondary_ip,
475 master_candidate=True,
476 offline=False, drained=False,
477 ctime=now, mtime=now,
479 InitConfig(constants.CONFIG_VERSION, cluster_config, master_node_config)
480 cfg = config.ConfigWriter(offline=True)
481 ssh.WriteKnownHostsFile(cfg, constants.SSH_KNOWN_HOSTS_FILE)
482 cfg.Update(cfg.GetClusterInfo(), logging.error)
483 backend.WriteSsconfFiles(cfg.GetSsconfValues())
485 # set up the inter-node password and certificate
486 _InitGanetiServerSetup(hostname.name)
488 logging.debug("Starting daemons")
489 result = utils.RunCmd([constants.DAEMON_UTIL, "start-all"])
491 raise errors.OpExecError("Could not start daemons, command %s"
492 " had exitcode %s and error %s" %
493 (result.cmd, result.exit_code, result.output))
495 _WaitForMasterDaemon()
498 def InitConfig(version, cluster_config, master_node_config,
499 cfg_file=constants.CLUSTER_CONF_FILE):
500 """Create the initial cluster configuration.
502 It will contain the current node, which will also be the master
503 node, and no instances.
506 @param version: configuration version
507 @type cluster_config: L{objects.Cluster}
508 @param cluster_config: cluster configuration
509 @type master_node_config: L{objects.Node}
510 @param master_node_config: master node configuration
511 @type cfg_file: string
512 @param cfg_file: configuration file path
515 uuid_generator = config.TemporaryReservationManager()
516 cluster_config.uuid = uuid_generator.Generate([], utils.NewUUID,
518 master_node_config.uuid = uuid_generator.Generate([], utils.NewUUID,
521 master_node_config.name: master_node_config,
523 default_nodegroup = objects.NodeGroup(
524 uuid=uuid_generator.Generate([], utils.NewUUID, _INITCONF_ECID),
525 name=constants.INITIAL_NODE_GROUP_NAME,
526 members=[master_node_config.name],
529 default_nodegroup.uuid: default_nodegroup,
532 config_data = objects.ConfigData(version=version,
533 cluster=cluster_config,
534 nodegroups=nodegroups,
538 ctime=now, mtime=now)
539 utils.WriteFile(cfg_file,
540 data=serializer.Dump(config_data.ToDict()),
544 def FinalizeClusterDestroy(master):
545 """Execute the last steps of cluster destroy
547 This function shuts down all the daemons, completing the destroy
548 begun in cmdlib.LUDestroyOpcode.
551 cfg = config.ConfigWriter()
552 modify_ssh_setup = cfg.GetClusterInfo().modify_ssh_setup
553 result = rpc.RpcRunner.call_node_stop_master(master, True)
554 msg = result.fail_msg
556 logging.warning("Could not disable the master role: %s", msg)
557 result = rpc.RpcRunner.call_node_leave_cluster(master, modify_ssh_setup)
558 msg = result.fail_msg
560 logging.warning("Could not shutdown the node daemon and cleanup"
561 " the node: %s", msg)
564 def SetupNodeDaemon(cluster_name, node, ssh_key_check):
565 """Add a node to the cluster.
567 This function must be called before the actual opcode, and will ssh
568 to the remote node, copy the needed files, and start ganeti-noded,
569 allowing the master to do the rest via normal rpc calls.
571 @param cluster_name: the cluster name
572 @param node: the name of the new node
573 @param ssh_key_check: whether to do a strict key check
576 family = ssconf.SimpleStore().GetPrimaryIPFamily()
577 sshrunner = ssh.SshRunner(cluster_name,
578 ipv6=(family == netutils.IP6Address.family))
580 bind_address = constants.IP4_ADDRESS_ANY
581 if family == netutils.IP6Address.family:
582 bind_address = constants.IP6_ADDRESS_ANY
584 # set up inter-node password and certificate and restarts the node daemon
585 # and then connect with ssh to set password and start ganeti-noded
586 # note that all the below variables are sanitized at this point,
587 # either by being constants or by the checks above
588 sshrunner.CopyFileToNode(node, constants.NODED_CERT_FILE)
589 sshrunner.CopyFileToNode(node, constants.RAPI_CERT_FILE)
590 sshrunner.CopyFileToNode(node, constants.CONFD_HMAC_KEY)
591 mycommand = ("%s stop-all; %s start %s -b %s" %
592 (constants.DAEMON_UTIL, constants.DAEMON_UTIL, constants.NODED,
593 utils.ShellQuote(bind_address)))
595 result = sshrunner.Run(node, 'root', mycommand, batch=False,
596 ask_key=ssh_key_check,
597 use_cluster_key=True,
598 strict_host_check=ssh_key_check)
600 raise errors.OpExecError("Remote command on node %s, error: %s,"
602 (node, result.fail_reason, result.output))
604 _WaitForNodeDaemon(node)
607 def MasterFailover(no_voting=False):
608 """Failover the master node.
610 This checks that we are not already the master, and will cause the
611 current master to cease being master, and the non-master to become
614 @type no_voting: boolean
615 @param no_voting: force the operation without remote nodes agreement
619 sstore = ssconf.SimpleStore()
621 old_master, new_master = ssconf.GetMasterAndMyself(sstore)
622 node_list = sstore.GetNodeList()
623 mc_list = sstore.GetMasterCandidates()
625 if old_master == new_master:
626 raise errors.OpPrereqError("This commands must be run on the node"
627 " where you want the new master to be."
628 " %s is already the master" %
629 old_master, errors.ECODE_INVAL)
631 if new_master not in mc_list:
632 mc_no_master = [name for name in mc_list if name != old_master]
633 raise errors.OpPrereqError("This node is not among the nodes marked"
634 " as master candidates. Only these nodes"
635 " can become masters. Current list of"
636 " master candidates is:\n"
637 "%s" % ('\n'.join(mc_no_master)),
641 vote_list = GatherMasterVotes(node_list)
644 voted_master = vote_list[0][0]
645 if voted_master is None:
646 raise errors.OpPrereqError("Cluster is inconsistent, most nodes did"
647 " not respond.", errors.ECODE_ENVIRON)
648 elif voted_master != old_master:
649 raise errors.OpPrereqError("I have a wrong configuration, I believe"
650 " the master is %s but the other nodes"
651 " voted %s. Please resync the configuration"
653 (old_master, voted_master),
659 logging.info("Setting master to %s, old master: %s", new_master, old_master)
662 # instantiate a real config writer, as we now know we have the
664 cfg = config.ConfigWriter(accept_foreign=True)
666 cluster_info = cfg.GetClusterInfo()
667 cluster_info.master_node = new_master
668 # this will also regenerate the ssconf files, since we updated the
670 cfg.Update(cluster_info, logging.error)
671 except errors.ConfigurationError, err:
672 logging.error("Error while trying to set the new master: %s",
676 # if cfg.Update worked, then it means the old master daemon won't be
677 # able now to write its own config file (we rely on locking in both
678 # backend.UploadFile() and ConfigWriter._Write(); hence the next
679 # step is to kill the old master
681 logging.info("Stopping the master daemon on node %s", old_master)
683 result = rpc.RpcRunner.call_node_stop_master(old_master, True)
684 msg = result.fail_msg
686 logging.error("Could not disable the master role on the old master"
687 " %s, please disable manually: %s", old_master, msg)
689 logging.info("Checking master IP non-reachability...")
691 master_ip = sstore.GetMasterIP()
693 # Here we have a phase where no master should be running
695 if netutils.TcpPing(master_ip, constants.DEFAULT_NODED_PORT):
696 raise utils.RetryAgain()
699 utils.Retry(_check_ip, (1, 1.5, 5), total_timeout)
700 except utils.RetryTimeout:
701 logging.warning("The master IP is still reachable after %s seconds,"
702 " continuing but activating the master on the current"
703 " node will probably fail", total_timeout)
705 if jstore.CheckDrainFlag():
706 logging.info("Undraining job queue")
707 jstore.SetDrainFlag(False)
709 logging.info("Starting the master daemons on the new master")
711 result = rpc.RpcRunner.call_node_start_master(new_master, True, no_voting)
712 msg = result.fail_msg
714 logging.error("Could not start the master role on the new master"
715 " %s, please check: %s", new_master, msg)
718 logging.info("Master failed over from %s to %s", old_master, new_master)
723 """Returns the current master node.
725 This is a separate function in bootstrap since it's needed by
726 gnt-cluster, and instead of importing directly ssconf, it's better
727 to abstract it in bootstrap, where we do use ssconf in other
731 sstore = ssconf.SimpleStore()
733 old_master, _ = ssconf.GetMasterAndMyself(sstore)
738 def GatherMasterVotes(node_list):
739 """Check the agreement on who is the master.
741 This function will return a list of (node, number of votes), ordered
742 by the number of votes. Errors will be denoted by the key 'None'.
744 Note that the sum of votes is the number of nodes this machine
745 knows, whereas the number of entries in the list could be different
746 (if some nodes vote for another master).
748 We remove ourselves from the list since we know that (bugs aside)
749 since we use the same source for configuration information for both
750 backend and boostrap, we'll always vote for ourselves.
752 @type node_list: list
753 @param node_list: the list of nodes to query for master info; the current
754 node will be removed if it is in the list
756 @return: list of (node, votes)
759 myself = netutils.Hostname.GetSysName()
761 node_list.remove(myself)
765 # no nodes left (eventually after removing myself)
767 results = rpc.RpcRunner.call_master_info(node_list)
768 if not isinstance(results, dict):
769 # this should not happen (unless internal error in rpc)
770 logging.critical("Can't complete rpc call, aborting master startup")
771 return [(None, len(node_list))]
779 logging.warning("Error contacting node %s: %s", node, msg)
781 # for now we accept both length 3 and 4 (data[3] is primary ip version)
782 elif not isinstance(data, (tuple, list)) or len(data) < 3:
783 logging.warning("Invalid data received from node %s: %s", node, data)
786 if None not in votes:
790 master_node = data[2]
791 if master_node not in votes:
792 votes[master_node] = 0
793 votes[master_node] += 1
795 vote_list = [v for v in votes.items()]
796 # sort first on number of votes then on name, since we want None
797 # sorted later if we have the half of the nodes not responding, and
798 # half voting all for the same master
799 vote_list.sort(key=lambda x: (x[1], x[0]), reverse=True)