4 # Copyright (C) 2006, 2007, 2008, 2010, 2011, 2012 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.BootstrapRunner().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, R0914
286 master_netmask, master_netdev, file_storage_dir,
287 shared_file_storage_dir, candidate_pool_size, secondary_ip=None,
288 vg_name=None, beparams=None, nicparams=None, ndparams=None,
289 hvparams=None, diskparams=None, enabled_hypervisors=None,
290 modify_etc_hosts=True, modify_ssh_setup=True,
291 maintain_node_health=False, drbd_helper=None, uid_pool=None,
292 default_iallocator=None, primary_ip_version=None, ipolicy=None,
293 prealloc_wipe_disks=False, use_external_mip_script=False,
294 hv_state=None, disk_state=None):
295 """Initialise the cluster.
297 @type candidate_pool_size: int
298 @param candidate_pool_size: master candidate pool size
301 # TODO: complete the docstring
302 if config.ConfigWriter.IsCluster():
303 raise errors.OpPrereqError("Cluster is already initialised",
306 if not enabled_hypervisors:
307 raise errors.OpPrereqError("Enabled hypervisors list must contain at"
308 " least one member", errors.ECODE_INVAL)
309 invalid_hvs = set(enabled_hypervisors) - constants.HYPER_TYPES
311 raise errors.OpPrereqError("Enabled hypervisors contains invalid"
312 " entries: %s" % invalid_hvs,
316 ipcls = netutils.IPAddress.GetClassFromIpVersion(primary_ip_version)
317 except errors.ProgrammerError:
318 raise errors.OpPrereqError("Invalid primary ip version: %d." %
321 hostname = netutils.GetHostname(family=ipcls.family)
322 if not ipcls.IsValid(hostname.ip):
323 raise errors.OpPrereqError("This host's IP (%s) is not a valid IPv%d"
324 " address." % (hostname.ip, primary_ip_version))
326 if ipcls.IsLoopback(hostname.ip):
327 raise errors.OpPrereqError("This host's IP (%s) resolves to a loopback"
328 " address. Please fix DNS or %s." %
329 (hostname.ip, constants.ETC_HOSTS),
330 errors.ECODE_ENVIRON)
332 if not ipcls.Own(hostname.ip):
333 raise errors.OpPrereqError("Inconsistency: this host's name resolves"
334 " to %s,\nbut this ip address does not"
335 " belong to this host" %
336 hostname.ip, errors.ECODE_ENVIRON)
338 clustername = netutils.GetHostname(name=cluster_name, family=ipcls.family)
340 if netutils.TcpPing(clustername.ip, constants.DEFAULT_NODED_PORT, timeout=5):
341 raise errors.OpPrereqError("Cluster IP already active",
342 errors.ECODE_NOTUNIQUE)
345 if primary_ip_version == constants.IP6_VERSION:
346 raise errors.OpPrereqError("When using a IPv6 primary address, a valid"
347 " IPv4 address must be given as secondary",
349 secondary_ip = hostname.ip
351 if not netutils.IP4Address.IsValid(secondary_ip):
352 raise errors.OpPrereqError("Secondary IP address (%s) has to be a valid"
353 " IPv4 address." % secondary_ip,
356 if not netutils.IP4Address.Own(secondary_ip):
357 raise errors.OpPrereqError("You gave %s as secondary IP,"
358 " but it does not belong to this host." %
359 secondary_ip, errors.ECODE_ENVIRON)
361 if master_netmask is not None:
362 if not ipcls.ValidateNetmask(master_netmask):
363 raise errors.OpPrereqError("CIDR netmask (%s) not valid for IPv%s " %
364 (master_netmask, primary_ip_version))
366 master_netmask = ipcls.iplen
368 if vg_name is not None:
369 # Check if volume group is valid
370 vgstatus = utils.CheckVolumeGroupSize(utils.ListVolumeGroups(), vg_name,
371 constants.MIN_VG_SIZE)
373 raise errors.OpPrereqError("Error: %s\nspecify --no-lvm-storage if"
374 " you are not using lvm" % vgstatus,
377 if drbd_helper is not None:
379 curr_helper = bdev.BaseDRBD.GetUsermodeHelper()
380 except errors.BlockDeviceError, err:
381 raise errors.OpPrereqError("Error while checking drbd helper"
382 " (specify --no-drbd-storage if you are not"
383 " using drbd): %s" % str(err),
384 errors.ECODE_ENVIRON)
385 if drbd_helper != curr_helper:
386 raise errors.OpPrereqError("Error: requiring %s as drbd helper but %s"
387 " is the current helper" % (drbd_helper,
391 if constants.ENABLE_FILE_STORAGE:
392 file_storage_dir = _InitFileStorage(file_storage_dir)
394 file_storage_dir = ""
396 if constants.ENABLE_SHARED_FILE_STORAGE:
397 shared_file_storage_dir = _InitFileStorage(shared_file_storage_dir)
399 shared_file_storage_dir = ""
401 if not re.match("^[0-9a-z]{2}:[0-9a-z]{2}:[0-9a-z]{2}$", mac_prefix):
402 raise errors.OpPrereqError("Invalid mac prefix given '%s'" % mac_prefix,
405 result = utils.RunCmd(["ip", "link", "show", "dev", master_netdev])
407 raise errors.OpPrereqError("Invalid master netdev given (%s): '%s'" %
409 result.output.strip()), errors.ECODE_INVAL)
411 dirs = [(constants.RUN_GANETI_DIR, constants.RUN_DIRS_MODE)]
412 utils.EnsureDirs(dirs)
414 objects.UpgradeBeParams(beparams)
415 utils.ForceDictType(beparams, constants.BES_PARAMETER_TYPES)
416 utils.ForceDictType(nicparams, constants.NICS_PARAMETER_TYPES)
418 objects.NIC.CheckParameterSyntax(nicparams)
420 full_ipolicy = objects.FillIPolicy(constants.IPOLICY_DEFAULTS, ipolicy)
422 if ndparams is not None:
423 utils.ForceDictType(ndparams, constants.NDS_PARAMETER_TYPES)
425 ndparams = dict(constants.NDC_DEFAULTS)
427 # This is ugly, as we modify the dict itself
428 # FIXME: Make utils.ForceDictType pure functional or write a wrapper
431 for hvname, hvs_data in hv_state.items():
432 utils.ForceDictType(hvs_data, constants.HVSTS_PARAMETER_TYPES)
433 hv_state[hvname] = objects.Cluster.SimpleFillHvState(hvs_data)
435 hv_state = dict((hvname, constants.HVST_DEFAULTS)
436 for hvname in enabled_hypervisors)
438 # FIXME: disk_state has no default values yet
440 for storage, ds_data in disk_state.items():
441 if storage not in constants.DS_VALID_TYPES:
442 raise errors.OpPrereqError("Invalid storage type in disk state: %s" %
443 storage, errors.ECODE_INVAL)
444 for ds_name, state in ds_data.items():
445 utils.ForceDictType(state, constants.DSS_PARAMETER_TYPES)
446 ds_data[ds_name] = objects.Cluster.SimpleFillDiskState(state)
448 # hvparams is a mapping of hypervisor->hvparams dict
449 for hv_name, hv_params in hvparams.iteritems():
450 utils.ForceDictType(hv_params, constants.HVS_PARAMETER_TYPES)
451 hv_class = hypervisor.GetHypervisor(hv_name)
452 hv_class.CheckParameterSyntax(hv_params)
454 # diskparams is a mapping of disk-template->diskparams dict
455 for template, dt_params in diskparams.items():
456 param_keys = set(dt_params.keys())
457 default_param_keys = set(constants.DISK_DT_DEFAULTS[template].keys())
458 if not (param_keys <= default_param_keys):
459 unknown_params = param_keys - default_param_keys
460 raise errors.OpPrereqError("Invalid parameters for disk template %s:"
462 utils.CommaJoin(unknown_params)))
463 utils.ForceDictType(dt_params, constants.DISK_DT_TYPES)
465 # set up ssh config and /etc/hosts
466 sshline = utils.ReadFile(constants.SSH_HOST_RSA_PUB)
467 sshkey = sshline.split(" ")[1]
470 utils.AddHostToEtcHosts(hostname.name, hostname.ip)
475 if default_iallocator is not None:
476 alloc_script = utils.FindFile(default_iallocator,
477 constants.IALLOCATOR_SEARCH_PATH,
479 if alloc_script is None:
480 raise errors.OpPrereqError("Invalid default iallocator script '%s'"
481 " specified" % default_iallocator,
483 elif constants.HTOOLS:
484 # htools was enabled at build-time, we default to it
485 if utils.FindFile(constants.IALLOC_HAIL,
486 constants.IALLOCATOR_SEARCH_PATH,
488 default_iallocator = constants.IALLOC_HAIL
492 # init of cluster config file
493 cluster_config = objects.Cluster(
495 rsahostkeypub=sshkey,
496 highest_used_port=(constants.FIRST_DRBD_PORT - 1),
497 mac_prefix=mac_prefix,
498 volume_group_name=vg_name,
499 tcpudp_port_pool=set(),
500 master_node=hostname.name,
501 master_ip=clustername.ip,
502 master_netmask=master_netmask,
503 master_netdev=master_netdev,
504 cluster_name=clustername.name,
505 file_storage_dir=file_storage_dir,
506 shared_file_storage_dir=shared_file_storage_dir,
507 enabled_hypervisors=enabled_hypervisors,
508 beparams={constants.PP_DEFAULT: beparams},
509 nicparams={constants.PP_DEFAULT: nicparams},
512 diskparams=diskparams,
513 candidate_pool_size=candidate_pool_size,
514 modify_etc_hosts=modify_etc_hosts,
515 modify_ssh_setup=modify_ssh_setup,
519 maintain_node_health=maintain_node_health,
520 drbd_usermode_helper=drbd_helper,
521 default_iallocator=default_iallocator,
522 primary_ip_family=ipcls.family,
523 prealloc_wipe_disks=prealloc_wipe_disks,
524 use_external_mip_script=use_external_mip_script,
525 ipolicy=full_ipolicy,
526 hv_state_static=hv_state,
527 disk_state_static=disk_state,
529 master_node_config = objects.Node(name=hostname.name,
530 primary_ip=hostname.ip,
531 secondary_ip=secondary_ip,
533 master_candidate=True,
534 offline=False, drained=False,
535 ctime=now, mtime=now,
537 InitConfig(constants.CONFIG_VERSION, cluster_config, master_node_config)
538 cfg = config.ConfigWriter(offline=True)
539 ssh.WriteKnownHostsFile(cfg, constants.SSH_KNOWN_HOSTS_FILE)
540 cfg.Update(cfg.GetClusterInfo(), logging.error)
541 backend.WriteSsconfFiles(cfg.GetSsconfValues())
543 # set up the inter-node password and certificate
544 _InitGanetiServerSetup(hostname.name)
546 logging.debug("Starting daemons")
547 result = utils.RunCmd([constants.DAEMON_UTIL, "start-all"])
549 raise errors.OpExecError("Could not start daemons, command %s"
550 " had exitcode %s and error %s" %
551 (result.cmd, result.exit_code, result.output))
553 _WaitForMasterDaemon()
556 def InitConfig(version, cluster_config, master_node_config,
557 cfg_file=constants.CLUSTER_CONF_FILE):
558 """Create the initial cluster configuration.
560 It will contain the current node, which will also be the master
561 node, and no instances.
564 @param version: configuration version
565 @type cluster_config: L{objects.Cluster}
566 @param cluster_config: cluster configuration
567 @type master_node_config: L{objects.Node}
568 @param master_node_config: master node configuration
569 @type cfg_file: string
570 @param cfg_file: configuration file path
573 uuid_generator = config.TemporaryReservationManager()
574 cluster_config.uuid = uuid_generator.Generate([], utils.NewUUID,
576 master_node_config.uuid = uuid_generator.Generate([], utils.NewUUID,
579 master_node_config.name: master_node_config,
581 default_nodegroup = objects.NodeGroup(
582 uuid=uuid_generator.Generate([], utils.NewUUID, _INITCONF_ECID),
583 name=constants.INITIAL_NODE_GROUP_NAME,
584 members=[master_node_config.name],
585 diskparams=cluster_config.diskparams,
588 default_nodegroup.uuid: default_nodegroup,
591 config_data = objects.ConfigData(version=version,
592 cluster=cluster_config,
593 nodegroups=nodegroups,
597 ctime=now, mtime=now)
598 utils.WriteFile(cfg_file,
599 data=serializer.Dump(config_data.ToDict()),
603 def FinalizeClusterDestroy(master):
604 """Execute the last steps of cluster destroy
606 This function shuts down all the daemons, completing the destroy
607 begun in cmdlib.LUDestroyOpcode.
610 cfg = config.ConfigWriter()
611 modify_ssh_setup = cfg.GetClusterInfo().modify_ssh_setup
612 runner = rpc.BootstrapRunner()
614 master_params = cfg.GetMasterNetworkParameters()
615 master_params.name = master
616 ems = cfg.GetUseExternalMipScript()
617 result = runner.call_node_deactivate_master_ip(master_params.name,
620 msg = result.fail_msg
622 logging.warning("Could not disable the master IP: %s", msg)
624 result = runner.call_node_stop_master(master)
625 msg = result.fail_msg
627 logging.warning("Could not disable the master role: %s", msg)
629 result = runner.call_node_leave_cluster(master, modify_ssh_setup)
630 msg = result.fail_msg
632 logging.warning("Could not shutdown the node daemon and cleanup"
633 " the node: %s", msg)
636 def SetupNodeDaemon(cluster_name, node, ssh_key_check):
637 """Add a node to the cluster.
639 This function must be called before the actual opcode, and will ssh
640 to the remote node, copy the needed files, and start ganeti-noded,
641 allowing the master to do the rest via normal rpc calls.
643 @param cluster_name: the cluster name
644 @param node: the name of the new node
645 @param ssh_key_check: whether to do a strict key check
648 family = ssconf.SimpleStore().GetPrimaryIPFamily()
649 sshrunner = ssh.SshRunner(cluster_name,
650 ipv6=(family == netutils.IP6Address.family))
652 bind_address = constants.IP4_ADDRESS_ANY
653 if family == netutils.IP6Address.family:
654 bind_address = constants.IP6_ADDRESS_ANY
656 # set up inter-node password and certificate and restarts the node daemon
657 # and then connect with ssh to set password and start ganeti-noded
658 # note that all the below variables are sanitized at this point,
659 # either by being constants or by the checks above
660 sshrunner.CopyFileToNode(node, constants.NODED_CERT_FILE)
661 sshrunner.CopyFileToNode(node, constants.RAPI_CERT_FILE)
662 sshrunner.CopyFileToNode(node, constants.SPICE_CERT_FILE)
663 sshrunner.CopyFileToNode(node, constants.SPICE_CACERT_FILE)
664 sshrunner.CopyFileToNode(node, constants.CONFD_HMAC_KEY)
665 mycommand = ("%s stop-all; %s start %s -b %s" %
666 (constants.DAEMON_UTIL, constants.DAEMON_UTIL, constants.NODED,
667 utils.ShellQuote(bind_address)))
669 result = sshrunner.Run(node, "root", mycommand, batch=False,
670 ask_key=ssh_key_check,
671 use_cluster_key=True,
672 strict_host_check=ssh_key_check)
674 raise errors.OpExecError("Remote command on node %s, error: %s,"
676 (node, result.fail_reason, result.output))
678 _WaitForNodeDaemon(node)
681 def MasterFailover(no_voting=False):
682 """Failover the master node.
684 This checks that we are not already the master, and will cause the
685 current master to cease being master, and the non-master to become
688 @type no_voting: boolean
689 @param no_voting: force the operation without remote nodes agreement
693 sstore = ssconf.SimpleStore()
695 old_master, new_master = ssconf.GetMasterAndMyself(sstore)
696 node_list = sstore.GetNodeList()
697 mc_list = sstore.GetMasterCandidates()
699 if old_master == new_master:
700 raise errors.OpPrereqError("This commands must be run on the node"
701 " where you want the new master to be."
702 " %s is already the master" %
703 old_master, errors.ECODE_INVAL)
705 if new_master not in mc_list:
706 mc_no_master = [name for name in mc_list if name != old_master]
707 raise errors.OpPrereqError("This node is not among the nodes marked"
708 " as master candidates. Only these nodes"
709 " can become masters. Current list of"
710 " master candidates is:\n"
711 "%s" % ("\n".join(mc_no_master)),
715 vote_list = GatherMasterVotes(node_list)
718 voted_master = vote_list[0][0]
719 if voted_master is None:
720 raise errors.OpPrereqError("Cluster is inconsistent, most nodes did"
721 " not respond.", errors.ECODE_ENVIRON)
722 elif voted_master != old_master:
723 raise errors.OpPrereqError("I have a wrong configuration, I believe"
724 " the master is %s but the other nodes"
725 " voted %s. Please resync the configuration"
727 (old_master, voted_master),
733 logging.info("Setting master to %s, old master: %s", new_master, old_master)
736 # instantiate a real config writer, as we now know we have the
738 cfg = config.ConfigWriter(accept_foreign=True)
740 cluster_info = cfg.GetClusterInfo()
741 cluster_info.master_node = new_master
742 # this will also regenerate the ssconf files, since we updated the
744 cfg.Update(cluster_info, logging.error)
745 except errors.ConfigurationError, err:
746 logging.error("Error while trying to set the new master: %s",
750 # if cfg.Update worked, then it means the old master daemon won't be
751 # able now to write its own config file (we rely on locking in both
752 # backend.UploadFile() and ConfigWriter._Write(); hence the next
753 # step is to kill the old master
755 logging.info("Stopping the master daemon on node %s", old_master)
757 runner = rpc.BootstrapRunner()
758 master_params = cfg.GetMasterNetworkParameters()
759 master_params.name = old_master
760 ems = cfg.GetUseExternalMipScript()
761 result = runner.call_node_deactivate_master_ip(master_params.name,
764 msg = result.fail_msg
766 logging.warning("Could not disable the master IP: %s", msg)
768 result = runner.call_node_stop_master(old_master)
769 msg = result.fail_msg
771 logging.error("Could not disable the master role on the old master"
772 " %s, please disable manually: %s", old_master, msg)
774 logging.info("Checking master IP non-reachability...")
776 master_ip = sstore.GetMasterIP()
779 # Here we have a phase where no master should be running
781 if netutils.TcpPing(master_ip, constants.DEFAULT_NODED_PORT):
782 raise utils.RetryAgain()
785 utils.Retry(_check_ip, (1, 1.5, 5), total_timeout)
786 except utils.RetryTimeout:
787 logging.warning("The master IP is still reachable after %s seconds,"
788 " continuing but activating the master on the current"
789 " node will probably fail", total_timeout)
791 if jstore.CheckDrainFlag():
792 logging.info("Undraining job queue")
793 jstore.SetDrainFlag(False)
795 logging.info("Starting the master daemons on the new master")
797 result = rpc.BootstrapRunner().call_node_start_master_daemons(new_master,
799 msg = result.fail_msg
801 logging.error("Could not start the master role on the new master"
802 " %s, please check: %s", new_master, msg)
805 logging.info("Master failed over from %s to %s", old_master, new_master)
810 """Returns the current master node.
812 This is a separate function in bootstrap since it's needed by
813 gnt-cluster, and instead of importing directly ssconf, it's better
814 to abstract it in bootstrap, where we do use ssconf in other
818 sstore = ssconf.SimpleStore()
820 old_master, _ = ssconf.GetMasterAndMyself(sstore)
825 def GatherMasterVotes(node_list):
826 """Check the agreement on who is the master.
828 This function will return a list of (node, number of votes), ordered
829 by the number of votes. Errors will be denoted by the key 'None'.
831 Note that the sum of votes is the number of nodes this machine
832 knows, whereas the number of entries in the list could be different
833 (if some nodes vote for another master).
835 We remove ourselves from the list since we know that (bugs aside)
836 since we use the same source for configuration information for both
837 backend and boostrap, we'll always vote for ourselves.
839 @type node_list: list
840 @param node_list: the list of nodes to query for master info; the current
841 node will be removed if it is in the list
843 @return: list of (node, votes)
846 myself = netutils.Hostname.GetSysName()
848 node_list.remove(myself)
852 # no nodes left (eventually after removing myself)
854 results = rpc.BootstrapRunner().call_master_info(node_list)
855 if not isinstance(results, dict):
856 # this should not happen (unless internal error in rpc)
857 logging.critical("Can't complete rpc call, aborting master startup")
858 return [(None, len(node_list))]
866 logging.warning("Error contacting node %s: %s", node, msg)
868 # for now we accept both length 3, 4 and 5 (data[3] is primary ip version
869 # and data[4] is the master netmask)
870 elif not isinstance(data, (tuple, list)) or len(data) < 3:
871 logging.warning("Invalid data received from node %s: %s", node, data)
874 if None not in votes:
878 master_node = data[2]
879 if master_node not in votes:
880 votes[master_node] = 0
881 votes[master_node] += 1
883 vote_list = [v for v in votes.items()]
884 # sort first on number of votes then on name, since we want None
885 # sorted later if we have the half of the nodes not responding, and
886 # half voting all for the same master
887 vote_list.sort(key=lambda x: (x[1], x[0]), reverse=True)