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_spice_cert,
92 new_confd_hmac_key, new_cds,
93 rapi_cert_pem=None, spice_cert_pem=None,
94 spice_cacert_pem=None, cds=None,
95 nodecert_file=constants.NODED_CERT_FILE,
96 rapicert_file=constants.RAPI_CERT_FILE,
97 spicecert_file=constants.SPICE_CERT_FILE,
98 spicecacert_file=constants.SPICE_CACERT_FILE,
99 hmackey_file=constants.CONFD_HMAC_KEY,
100 cds_file=constants.CLUSTER_DOMAIN_SECRET_FILE):
101 """Updates the cluster certificates, keys and secrets.
103 @type new_cluster_cert: bool
104 @param new_cluster_cert: Whether to generate a new cluster certificate
105 @type new_rapi_cert: bool
106 @param new_rapi_cert: Whether to generate a new RAPI certificate
107 @type new_spice_cert: bool
108 @param new_spice_cert: Whether to generate a new SPICE certificate
109 @type new_confd_hmac_key: bool
110 @param new_confd_hmac_key: Whether to generate a new HMAC key
112 @param new_cds: Whether to generate a new cluster domain secret
113 @type rapi_cert_pem: string
114 @param rapi_cert_pem: New RAPI certificate in PEM format
115 @type spice_cert_pem: string
116 @param spice_cert_pem: New SPICE certificate in PEM format
117 @type spice_cacert_pem: string
118 @param spice_cacert_pem: Certificate of the CA that signed the SPICE
119 certificate, in PEM format
121 @param cds: New cluster domain secret
122 @type nodecert_file: string
123 @param nodecert_file: optional override of the node cert file path
124 @type rapicert_file: string
125 @param rapicert_file: optional override of the rapi cert file path
126 @type spicecert_file: string
127 @param spicecert_file: optional override of the spice cert file path
128 @type spicecacert_file: string
129 @param spicecacert_file: optional override of the spice CA cert file path
130 @type hmackey_file: string
131 @param hmackey_file: optional override of the hmac key file path
134 # noded SSL certificate
135 cluster_cert_exists = os.path.exists(nodecert_file)
136 if new_cluster_cert or not cluster_cert_exists:
137 if cluster_cert_exists:
138 utils.CreateBackup(nodecert_file)
140 logging.debug("Generating new cluster certificate at %s", nodecert_file)
141 utils.GenerateSelfSignedSslCert(nodecert_file)
144 if new_confd_hmac_key or not os.path.exists(hmackey_file):
145 logging.debug("Writing new confd HMAC key to %s", hmackey_file)
146 GenerateHmacKey(hmackey_file)
149 rapi_cert_exists = os.path.exists(rapicert_file)
152 # Assume rapi_pem contains a valid PEM-formatted certificate and key
153 logging.debug("Writing RAPI certificate at %s", rapicert_file)
154 utils.WriteFile(rapicert_file, data=rapi_cert_pem, backup=True)
156 elif new_rapi_cert or not rapi_cert_exists:
158 utils.CreateBackup(rapicert_file)
160 logging.debug("Generating new RAPI certificate at %s", rapicert_file)
161 utils.GenerateSelfSignedSslCert(rapicert_file)
164 spice_cert_exists = os.path.exists(spicecert_file)
165 spice_cacert_exists = os.path.exists(spicecacert_file)
167 # spice_cert_pem implies also spice_cacert_pem
168 logging.debug("Writing SPICE certificate at %s", spicecert_file)
169 utils.WriteFile(spicecert_file, data=spice_cert_pem, backup=True)
170 logging.debug("Writing SPICE CA certificate at %s", spicecacert_file)
171 utils.WriteFile(spicecacert_file, data=spice_cacert_pem, backup=True)
172 elif new_spice_cert or not spice_cert_exists:
173 if spice_cert_exists:
174 utils.CreateBackup(spicecert_file)
175 if spice_cacert_exists:
176 utils.CreateBackup(spicecacert_file)
178 logging.debug("Generating new self-signed SPICE certificate at %s",
180 (_, cert_pem) = utils.GenerateSelfSignedSslCert(spicecert_file)
182 # Self-signed certificate -> the public certificate is also the CA public
184 logging.debug("Writing the public certificate to %s",
186 utils.io.WriteFile(spicecacert_file, mode=0400, data=cert_pem)
188 # Cluster domain secret
190 logging.debug("Writing cluster domain secret to %s", cds_file)
191 utils.WriteFile(cds_file, data=cds, backup=True)
193 elif new_cds or not os.path.exists(cds_file):
194 logging.debug("Generating new cluster domain secret at %s", cds_file)
195 GenerateHmacKey(cds_file)
198 def _InitGanetiServerSetup(master_name):
199 """Setup the necessary configuration for the initial node daemon.
201 This creates the nodepass file containing the shared password for
202 the cluster, generates the SSL certificate and starts the node daemon.
204 @type master_name: str
205 @param master_name: Name of the master node
208 # Generate cluster secrets
209 GenerateClusterCrypto(True, False, False, False, False)
211 result = utils.RunCmd([constants.DAEMON_UTIL, "start", constants.NODED])
213 raise errors.OpExecError("Could not start the node daemon, command %s"
214 " had exitcode %s and error %s" %
215 (result.cmd, result.exit_code, result.output))
217 _WaitForNodeDaemon(master_name)
220 def _WaitForNodeDaemon(node_name):
221 """Wait for node daemon to become responsive.
224 def _CheckNodeDaemon():
225 result = rpc.RpcRunner.call_version([node_name])[node_name]
227 raise utils.RetryAgain()
230 utils.Retry(_CheckNodeDaemon, 1.0, _DAEMON_READY_TIMEOUT)
231 except utils.RetryTimeout:
232 raise errors.OpExecError("Node daemon on %s didn't answer queries within"
233 " %s seconds" % (node_name, _DAEMON_READY_TIMEOUT))
236 def _WaitForMasterDaemon():
237 """Wait for master daemon to become responsive.
240 def _CheckMasterDaemon():
243 (cluster_name, ) = cl.QueryConfigValues(["cluster_name"])
245 raise utils.RetryAgain()
247 logging.debug("Received cluster name %s from master", cluster_name)
250 utils.Retry(_CheckMasterDaemon, 1.0, _DAEMON_READY_TIMEOUT)
251 except utils.RetryTimeout:
252 raise errors.OpExecError("Master daemon didn't answer queries within"
253 " %s seconds" % _DAEMON_READY_TIMEOUT)
256 def _InitFileStorage(file_storage_dir):
257 """Initialize if needed the file storage.
259 @param file_storage_dir: the user-supplied value
260 @return: either empty string (if file storage was disabled at build
261 time) or the normalized path to the storage directory
264 file_storage_dir = os.path.normpath(file_storage_dir)
266 if not os.path.isabs(file_storage_dir):
267 raise errors.OpPrereqError("File storage directory '%s' is not an absolute"
268 " path" % file_storage_dir, errors.ECODE_INVAL)
270 if not os.path.exists(file_storage_dir):
272 os.makedirs(file_storage_dir, 0750)
274 raise errors.OpPrereqError("Cannot create file storage directory"
275 " '%s': %s" % (file_storage_dir, err),
276 errors.ECODE_ENVIRON)
278 if not os.path.isdir(file_storage_dir):
279 raise errors.OpPrereqError("The file storage directory '%s' is not"
280 " a directory." % file_storage_dir,
281 errors.ECODE_ENVIRON)
282 return file_storage_dir
285 def InitCluster(cluster_name, mac_prefix, # pylint: disable=R0913
286 master_netdev, file_storage_dir, shared_file_storage_dir,
287 candidate_pool_size, secondary_ip=None, vg_name=None,
288 beparams=None, nicparams=None, ndparams=None, hvparams=None,
289 enabled_hypervisors=None, modify_etc_hosts=True,
290 modify_ssh_setup=True, maintain_node_health=False,
291 drbd_helper=None, uid_pool=None, default_iallocator=None,
292 primary_ip_version=None, prealloc_wipe_disks=False):
293 """Initialise the cluster.
295 @type candidate_pool_size: int
296 @param candidate_pool_size: master candidate pool size
299 # TODO: complete the docstring
300 if config.ConfigWriter.IsCluster():
301 raise errors.OpPrereqError("Cluster is already initialised",
304 if not enabled_hypervisors:
305 raise errors.OpPrereqError("Enabled hypervisors list must contain at"
306 " least one member", errors.ECODE_INVAL)
307 invalid_hvs = set(enabled_hypervisors) - constants.HYPER_TYPES
309 raise errors.OpPrereqError("Enabled hypervisors contains invalid"
310 " entries: %s" % invalid_hvs,
314 if primary_ip_version == constants.IP4_VERSION:
315 ipcls = netutils.IP4Address
316 elif primary_ip_version == constants.IP6_VERSION:
317 ipcls = netutils.IP6Address
319 raise errors.OpPrereqError("Invalid primary ip version: %d." %
322 hostname = netutils.GetHostname(family=ipcls.family)
323 if not ipcls.IsValid(hostname.ip):
324 raise errors.OpPrereqError("This host's IP (%s) is not a valid IPv%d"
325 " address." % (hostname.ip, primary_ip_version))
327 if ipcls.IsLoopback(hostname.ip):
328 raise errors.OpPrereqError("This host's IP (%s) resolves to a loopback"
329 " address. Please fix DNS or %s." %
330 (hostname.ip, constants.ETC_HOSTS),
331 errors.ECODE_ENVIRON)
333 if not ipcls.Own(hostname.ip):
334 raise errors.OpPrereqError("Inconsistency: this host's name resolves"
335 " to %s,\nbut this ip address does not"
336 " belong to this host" %
337 hostname.ip, errors.ECODE_ENVIRON)
339 clustername = netutils.GetHostname(name=cluster_name, family=ipcls.family)
341 if netutils.TcpPing(clustername.ip, constants.DEFAULT_NODED_PORT, timeout=5):
342 raise errors.OpPrereqError("Cluster IP already active",
343 errors.ECODE_NOTUNIQUE)
346 if primary_ip_version == constants.IP6_VERSION:
347 raise errors.OpPrereqError("When using a IPv6 primary address, a valid"
348 " IPv4 address must be given as secondary",
350 secondary_ip = hostname.ip
352 if not netutils.IP4Address.IsValid(secondary_ip):
353 raise errors.OpPrereqError("Secondary IP address (%s) has to be a valid"
354 " IPv4 address." % secondary_ip,
357 if not netutils.IP4Address.Own(secondary_ip):
358 raise errors.OpPrereqError("You gave %s as secondary IP,"
359 " but it does not belong to this host." %
360 secondary_ip, errors.ECODE_ENVIRON)
362 if vg_name is not None:
363 # Check if volume group is valid
364 vgstatus = utils.CheckVolumeGroupSize(utils.ListVolumeGroups(), vg_name,
365 constants.MIN_VG_SIZE)
367 raise errors.OpPrereqError("Error: %s\nspecify --no-lvm-storage if"
368 " you are not using lvm" % vgstatus,
371 if drbd_helper is not None:
373 curr_helper = bdev.BaseDRBD.GetUsermodeHelper()
374 except errors.BlockDeviceError, err:
375 raise errors.OpPrereqError("Error while checking drbd helper"
376 " (specify --no-drbd-storage if you are not"
377 " using drbd): %s" % str(err),
378 errors.ECODE_ENVIRON)
379 if drbd_helper != curr_helper:
380 raise errors.OpPrereqError("Error: requiring %s as drbd helper but %s"
381 " is the current helper" % (drbd_helper,
385 if constants.ENABLE_FILE_STORAGE:
386 file_storage_dir = _InitFileStorage(file_storage_dir)
388 file_storage_dir = ""
390 if constants.ENABLE_SHARED_FILE_STORAGE:
391 shared_file_storage_dir = _InitFileStorage(shared_file_storage_dir)
393 shared_file_storage_dir = ""
395 if not re.match("^[0-9a-z]{2}:[0-9a-z]{2}:[0-9a-z]{2}$", mac_prefix):
396 raise errors.OpPrereqError("Invalid mac prefix given '%s'" % mac_prefix,
399 result = utils.RunCmd(["ip", "link", "show", "dev", master_netdev])
401 raise errors.OpPrereqError("Invalid master netdev given (%s): '%s'" %
403 result.output.strip()), errors.ECODE_INVAL)
405 dirs = [(constants.RUN_GANETI_DIR, constants.RUN_DIRS_MODE)]
406 utils.EnsureDirs(dirs)
408 utils.ForceDictType(beparams, constants.BES_PARAMETER_TYPES)
409 utils.ForceDictType(nicparams, constants.NICS_PARAMETER_TYPES)
410 objects.NIC.CheckParameterSyntax(nicparams)
412 if ndparams is not None:
413 utils.ForceDictType(ndparams, constants.NDS_PARAMETER_TYPES)
415 ndparams = dict(constants.NDC_DEFAULTS)
417 # hvparams is a mapping of hypervisor->hvparams dict
418 for hv_name, hv_params in hvparams.iteritems():
419 utils.ForceDictType(hv_params, constants.HVS_PARAMETER_TYPES)
420 hv_class = hypervisor.GetHypervisor(hv_name)
421 hv_class.CheckParameterSyntax(hv_params)
423 # set up ssh config and /etc/hosts
424 sshline = utils.ReadFile(constants.SSH_HOST_RSA_PUB)
425 sshkey = sshline.split(" ")[1]
428 utils.AddHostToEtcHosts(hostname.name, hostname.ip)
433 if default_iallocator is not None:
434 alloc_script = utils.FindFile(default_iallocator,
435 constants.IALLOCATOR_SEARCH_PATH,
437 if alloc_script is None:
438 raise errors.OpPrereqError("Invalid default iallocator script '%s'"
439 " specified" % default_iallocator,
441 elif constants.HTOOLS:
442 # htools was enabled at build-time, we default to it
443 if utils.FindFile(constants.IALLOC_HAIL,
444 constants.IALLOCATOR_SEARCH_PATH,
446 default_iallocator = constants.IALLOC_HAIL
450 # init of cluster config file
451 cluster_config = objects.Cluster(
453 rsahostkeypub=sshkey,
454 highest_used_port=(constants.FIRST_DRBD_PORT - 1),
455 mac_prefix=mac_prefix,
456 volume_group_name=vg_name,
457 tcpudp_port_pool=set(),
458 master_node=hostname.name,
459 master_ip=clustername.ip,
460 master_netdev=master_netdev,
461 cluster_name=clustername.name,
462 file_storage_dir=file_storage_dir,
463 shared_file_storage_dir=shared_file_storage_dir,
464 enabled_hypervisors=enabled_hypervisors,
465 beparams={constants.PP_DEFAULT: beparams},
466 nicparams={constants.PP_DEFAULT: nicparams},
469 candidate_pool_size=candidate_pool_size,
470 modify_etc_hosts=modify_etc_hosts,
471 modify_ssh_setup=modify_ssh_setup,
475 maintain_node_health=maintain_node_health,
476 drbd_usermode_helper=drbd_helper,
477 default_iallocator=default_iallocator,
478 primary_ip_family=ipcls.family,
479 prealloc_wipe_disks=prealloc_wipe_disks,
481 master_node_config = objects.Node(name=hostname.name,
482 primary_ip=hostname.ip,
483 secondary_ip=secondary_ip,
485 master_candidate=True,
486 offline=False, drained=False,
487 ctime=now, mtime=now,
489 InitConfig(constants.CONFIG_VERSION, cluster_config, master_node_config)
490 cfg = config.ConfigWriter(offline=True)
491 ssh.WriteKnownHostsFile(cfg, constants.SSH_KNOWN_HOSTS_FILE)
492 cfg.Update(cfg.GetClusterInfo(), logging.error)
493 backend.WriteSsconfFiles(cfg.GetSsconfValues())
495 # set up the inter-node password and certificate
496 _InitGanetiServerSetup(hostname.name)
498 logging.debug("Starting daemons")
499 result = utils.RunCmd([constants.DAEMON_UTIL, "start-all"])
501 raise errors.OpExecError("Could not start daemons, command %s"
502 " had exitcode %s and error %s" %
503 (result.cmd, result.exit_code, result.output))
505 _WaitForMasterDaemon()
508 def InitConfig(version, cluster_config, master_node_config,
509 cfg_file=constants.CLUSTER_CONF_FILE):
510 """Create the initial cluster configuration.
512 It will contain the current node, which will also be the master
513 node, and no instances.
516 @param version: configuration version
517 @type cluster_config: L{objects.Cluster}
518 @param cluster_config: cluster configuration
519 @type master_node_config: L{objects.Node}
520 @param master_node_config: master node configuration
521 @type cfg_file: string
522 @param cfg_file: configuration file path
525 uuid_generator = config.TemporaryReservationManager()
526 cluster_config.uuid = uuid_generator.Generate([], utils.NewUUID,
528 master_node_config.uuid = uuid_generator.Generate([], utils.NewUUID,
531 master_node_config.name: master_node_config,
533 default_nodegroup = objects.NodeGroup(
534 uuid=uuid_generator.Generate([], utils.NewUUID, _INITCONF_ECID),
535 name=constants.INITIAL_NODE_GROUP_NAME,
536 members=[master_node_config.name],
539 default_nodegroup.uuid: default_nodegroup,
542 config_data = objects.ConfigData(version=version,
543 cluster=cluster_config,
544 nodegroups=nodegroups,
548 ctime=now, mtime=now)
549 utils.WriteFile(cfg_file,
550 data=serializer.Dump(config_data.ToDict()),
554 def FinalizeClusterDestroy(master):
555 """Execute the last steps of cluster destroy
557 This function shuts down all the daemons, completing the destroy
558 begun in cmdlib.LUDestroyOpcode.
561 cfg = config.ConfigWriter()
562 modify_ssh_setup = cfg.GetClusterInfo().modify_ssh_setup
563 result = rpc.RpcRunner.call_node_stop_master(master, True)
564 msg = result.fail_msg
566 logging.warning("Could not disable the master role: %s", msg)
567 result = rpc.RpcRunner.call_node_leave_cluster(master, modify_ssh_setup)
568 msg = result.fail_msg
570 logging.warning("Could not shutdown the node daemon and cleanup"
571 " the node: %s", msg)
574 def SetupNodeDaemon(cluster_name, node, ssh_key_check):
575 """Add a node to the cluster.
577 This function must be called before the actual opcode, and will ssh
578 to the remote node, copy the needed files, and start ganeti-noded,
579 allowing the master to do the rest via normal rpc calls.
581 @param cluster_name: the cluster name
582 @param node: the name of the new node
583 @param ssh_key_check: whether to do a strict key check
586 family = ssconf.SimpleStore().GetPrimaryIPFamily()
587 sshrunner = ssh.SshRunner(cluster_name,
588 ipv6=(family == netutils.IP6Address.family))
590 bind_address = constants.IP4_ADDRESS_ANY
591 if family == netutils.IP6Address.family:
592 bind_address = constants.IP6_ADDRESS_ANY
594 # set up inter-node password and certificate and restarts the node daemon
595 # and then connect with ssh to set password and start ganeti-noded
596 # note that all the below variables are sanitized at this point,
597 # either by being constants or by the checks above
598 sshrunner.CopyFileToNode(node, constants.NODED_CERT_FILE)
599 sshrunner.CopyFileToNode(node, constants.RAPI_CERT_FILE)
600 sshrunner.CopyFileToNode(node, constants.SPICE_CERT_FILE)
601 sshrunner.CopyFileToNode(node, constants.SPICE_CACERT_FILE)
602 sshrunner.CopyFileToNode(node, constants.CONFD_HMAC_KEY)
603 mycommand = ("%s stop-all; %s start %s -b %s" %
604 (constants.DAEMON_UTIL, constants.DAEMON_UTIL, constants.NODED,
605 utils.ShellQuote(bind_address)))
607 result = sshrunner.Run(node, 'root', mycommand, batch=False,
608 ask_key=ssh_key_check,
609 use_cluster_key=True,
610 strict_host_check=ssh_key_check)
612 raise errors.OpExecError("Remote command on node %s, error: %s,"
614 (node, result.fail_reason, result.output))
616 _WaitForNodeDaemon(node)
619 def MasterFailover(no_voting=False):
620 """Failover the master node.
622 This checks that we are not already the master, and will cause the
623 current master to cease being master, and the non-master to become
626 @type no_voting: boolean
627 @param no_voting: force the operation without remote nodes agreement
631 sstore = ssconf.SimpleStore()
633 old_master, new_master = ssconf.GetMasterAndMyself(sstore)
634 node_list = sstore.GetNodeList()
635 mc_list = sstore.GetMasterCandidates()
637 if old_master == new_master:
638 raise errors.OpPrereqError("This commands must be run on the node"
639 " where you want the new master to be."
640 " %s is already the master" %
641 old_master, errors.ECODE_INVAL)
643 if new_master not in mc_list:
644 mc_no_master = [name for name in mc_list if name != old_master]
645 raise errors.OpPrereqError("This node is not among the nodes marked"
646 " as master candidates. Only these nodes"
647 " can become masters. Current list of"
648 " master candidates is:\n"
649 "%s" % ('\n'.join(mc_no_master)),
653 vote_list = GatherMasterVotes(node_list)
656 voted_master = vote_list[0][0]
657 if voted_master is None:
658 raise errors.OpPrereqError("Cluster is inconsistent, most nodes did"
659 " not respond.", errors.ECODE_ENVIRON)
660 elif voted_master != old_master:
661 raise errors.OpPrereqError("I have a wrong configuration, I believe"
662 " the master is %s but the other nodes"
663 " voted %s. Please resync the configuration"
665 (old_master, voted_master),
671 logging.info("Setting master to %s, old master: %s", new_master, old_master)
674 # instantiate a real config writer, as we now know we have the
676 cfg = config.ConfigWriter(accept_foreign=True)
678 cluster_info = cfg.GetClusterInfo()
679 cluster_info.master_node = new_master
680 # this will also regenerate the ssconf files, since we updated the
682 cfg.Update(cluster_info, logging.error)
683 except errors.ConfigurationError, err:
684 logging.error("Error while trying to set the new master: %s",
688 # if cfg.Update worked, then it means the old master daemon won't be
689 # able now to write its own config file (we rely on locking in both
690 # backend.UploadFile() and ConfigWriter._Write(); hence the next
691 # step is to kill the old master
693 logging.info("Stopping the master daemon on node %s", old_master)
695 result = rpc.RpcRunner.call_node_stop_master(old_master, True)
696 msg = result.fail_msg
698 logging.error("Could not disable the master role on the old master"
699 " %s, please disable manually: %s", old_master, msg)
701 logging.info("Checking master IP non-reachability...")
703 master_ip = sstore.GetMasterIP()
706 # Here we have a phase where no master should be running
708 if netutils.TcpPing(master_ip, constants.DEFAULT_NODED_PORT):
709 raise utils.RetryAgain()
712 utils.Retry(_check_ip, (1, 1.5, 5), total_timeout)
713 except utils.RetryTimeout:
714 logging.warning("The master IP is still reachable after %s seconds,"
715 " continuing but activating the master on the current"
716 " node will probably fail", total_timeout)
718 if jstore.CheckDrainFlag():
719 logging.info("Undraining job queue")
720 jstore.SetDrainFlag(False)
722 logging.info("Starting the master daemons on the new master")
724 result = rpc.RpcRunner.call_node_start_master(new_master, True, no_voting)
725 msg = result.fail_msg
727 logging.error("Could not start the master role on the new master"
728 " %s, please check: %s", new_master, msg)
731 logging.info("Master failed over from %s to %s", old_master, new_master)
736 """Returns the current master node.
738 This is a separate function in bootstrap since it's needed by
739 gnt-cluster, and instead of importing directly ssconf, it's better
740 to abstract it in bootstrap, where we do use ssconf in other
744 sstore = ssconf.SimpleStore()
746 old_master, _ = ssconf.GetMasterAndMyself(sstore)
751 def GatherMasterVotes(node_list):
752 """Check the agreement on who is the master.
754 This function will return a list of (node, number of votes), ordered
755 by the number of votes. Errors will be denoted by the key 'None'.
757 Note that the sum of votes is the number of nodes this machine
758 knows, whereas the number of entries in the list could be different
759 (if some nodes vote for another master).
761 We remove ourselves from the list since we know that (bugs aside)
762 since we use the same source for configuration information for both
763 backend and boostrap, we'll always vote for ourselves.
765 @type node_list: list
766 @param node_list: the list of nodes to query for master info; the current
767 node will be removed if it is in the list
769 @return: list of (node, votes)
772 myself = netutils.Hostname.GetSysName()
774 node_list.remove(myself)
778 # no nodes left (eventually after removing myself)
780 results = rpc.RpcRunner.call_master_info(node_list)
781 if not isinstance(results, dict):
782 # this should not happen (unless internal error in rpc)
783 logging.critical("Can't complete rpc call, aborting master startup")
784 return [(None, len(node_list))]
792 logging.warning("Error contacting node %s: %s", node, msg)
794 # for now we accept both length 3 and 4 (data[3] is primary ip version)
795 elif not isinstance(data, (tuple, list)) or len(data) < 3:
796 logging.warning("Invalid data received from node %s: %s", node, data)
799 if None not in votes:
803 master_node = data[2]
804 if master_node not in votes:
805 votes[master_node] = 0
806 votes[master_node] += 1
808 vote_list = [v for v in votes.items()]
809 # sort first on number of votes then on name, since we want None
810 # sorted later if we have the half of the nodes not responding, and
811 # half voting all for the same master
812 vote_list.sort(key=lambda x: (x[1], x[0]), reverse=True)