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.
33 from ganeti import rpc
34 from ganeti import ssh
35 from ganeti import utils
36 from ganeti import errors
37 from ganeti import config
38 from ganeti import constants
39 from ganeti import objects
40 from ganeti import ssconf
41 from ganeti import serializer
42 from ganeti import hypervisor
43 from ganeti import bdev
44 from ganeti import netutils
45 from ganeti import luxi
46 from ganeti import jstore
47 from ganeti import pathutils
50 # ec_id for InitConfig's temporary reservation manager
51 _INITCONF_ECID = "initconfig-ecid"
53 #: After how many seconds daemon must be responsive
54 _DAEMON_READY_TIMEOUT = 10.0
58 """Setup the SSH configuration for the cluster.
60 This generates a dsa keypair for root, adds the pub key to the
61 permitted hosts and adds the hostkey to its own known hosts.
64 priv_key, pub_key, auth_keys = ssh.GetUserFiles(constants.SSH_LOGIN_USER)
66 for name in priv_key, pub_key:
67 if os.path.exists(name):
68 utils.CreateBackup(name)
69 utils.RemoveFile(name)
71 result = utils.RunCmd(["ssh-keygen", "-t", "dsa",
75 raise errors.OpExecError("Could not generate ssh keypair, error %s" %
78 utils.AddAuthorizedKey(auth_keys, utils.ReadFile(pub_key))
81 def GenerateHmacKey(file_name):
82 """Writes a new HMAC key.
85 @param file_name: Path to output file
88 utils.WriteFile(file_name, data="%s\n" % utils.GenerateSecret(), mode=0400,
92 def GenerateClusterCrypto(new_cluster_cert, new_rapi_cert, new_spice_cert,
93 new_confd_hmac_key, new_cds,
94 rapi_cert_pem=None, spice_cert_pem=None,
95 spice_cacert_pem=None, cds=None,
96 nodecert_file=pathutils.NODED_CERT_FILE,
97 rapicert_file=pathutils.RAPI_CERT_FILE,
98 spicecert_file=pathutils.SPICE_CERT_FILE,
99 spicecacert_file=pathutils.SPICE_CACERT_FILE,
100 hmackey_file=pathutils.CONFD_HMAC_KEY,
101 cds_file=pathutils.CLUSTER_DOMAIN_SECRET_FILE):
102 """Updates the cluster certificates, keys and secrets.
104 @type new_cluster_cert: bool
105 @param new_cluster_cert: Whether to generate a new cluster certificate
106 @type new_rapi_cert: bool
107 @param new_rapi_cert: Whether to generate a new RAPI certificate
108 @type new_spice_cert: bool
109 @param new_spice_cert: Whether to generate a new SPICE certificate
110 @type new_confd_hmac_key: bool
111 @param new_confd_hmac_key: Whether to generate a new HMAC key
113 @param new_cds: Whether to generate a new cluster domain secret
114 @type rapi_cert_pem: string
115 @param rapi_cert_pem: New RAPI certificate in PEM format
116 @type spice_cert_pem: string
117 @param spice_cert_pem: New SPICE certificate in PEM format
118 @type spice_cacert_pem: string
119 @param spice_cacert_pem: Certificate of the CA that signed the SPICE
120 certificate, in PEM format
122 @param cds: New cluster domain secret
123 @type nodecert_file: string
124 @param nodecert_file: optional override of the node cert file path
125 @type rapicert_file: string
126 @param rapicert_file: optional override of the rapi cert file path
127 @type spicecert_file: string
128 @param spicecert_file: optional override of the spice cert file path
129 @type spicecacert_file: string
130 @param spicecacert_file: optional override of the spice CA cert file path
131 @type hmackey_file: string
132 @param hmackey_file: optional override of the hmac key file path
135 # noded SSL certificate
136 cluster_cert_exists = os.path.exists(nodecert_file)
137 if new_cluster_cert or not cluster_cert_exists:
138 if cluster_cert_exists:
139 utils.CreateBackup(nodecert_file)
141 logging.debug("Generating new cluster certificate at %s", nodecert_file)
142 utils.GenerateSelfSignedSslCert(nodecert_file)
145 if new_confd_hmac_key or not os.path.exists(hmackey_file):
146 logging.debug("Writing new confd HMAC key to %s", hmackey_file)
147 GenerateHmacKey(hmackey_file)
150 rapi_cert_exists = os.path.exists(rapicert_file)
153 # Assume rapi_pem contains a valid PEM-formatted certificate and key
154 logging.debug("Writing RAPI certificate at %s", rapicert_file)
155 utils.WriteFile(rapicert_file, data=rapi_cert_pem, backup=True)
157 elif new_rapi_cert or not rapi_cert_exists:
159 utils.CreateBackup(rapicert_file)
161 logging.debug("Generating new RAPI certificate at %s", rapicert_file)
162 utils.GenerateSelfSignedSslCert(rapicert_file)
165 spice_cert_exists = os.path.exists(spicecert_file)
166 spice_cacert_exists = os.path.exists(spicecacert_file)
168 # spice_cert_pem implies also spice_cacert_pem
169 logging.debug("Writing SPICE certificate at %s", spicecert_file)
170 utils.WriteFile(spicecert_file, data=spice_cert_pem, backup=True)
171 logging.debug("Writing SPICE CA certificate at %s", spicecacert_file)
172 utils.WriteFile(spicecacert_file, data=spice_cacert_pem, backup=True)
173 elif new_spice_cert or not spice_cert_exists:
174 if spice_cert_exists:
175 utils.CreateBackup(spicecert_file)
176 if spice_cacert_exists:
177 utils.CreateBackup(spicecacert_file)
179 logging.debug("Generating new self-signed SPICE certificate at %s",
181 (_, cert_pem) = utils.GenerateSelfSignedSslCert(spicecert_file)
183 # Self-signed certificate -> the public certificate is also the CA public
185 logging.debug("Writing the public certificate to %s",
187 utils.io.WriteFile(spicecacert_file, mode=0400, data=cert_pem)
189 # Cluster domain secret
191 logging.debug("Writing cluster domain secret to %s", cds_file)
192 utils.WriteFile(cds_file, data=cds, backup=True)
194 elif new_cds or not os.path.exists(cds_file):
195 logging.debug("Generating new cluster domain secret at %s", cds_file)
196 GenerateHmacKey(cds_file)
199 def _InitGanetiServerSetup(master_name):
200 """Setup the necessary configuration for the initial node daemon.
202 This creates the nodepass file containing the shared password for
203 the cluster, generates the SSL certificate and starts the node daemon.
205 @type master_name: str
206 @param master_name: Name of the master node
209 # Generate cluster secrets
210 GenerateClusterCrypto(True, False, False, False, False)
212 result = utils.RunCmd([pathutils.DAEMON_UTIL, "start", constants.NODED])
214 raise errors.OpExecError("Could not start the node daemon, command %s"
215 " had exitcode %s and error %s" %
216 (result.cmd, result.exit_code, result.output))
218 _WaitForNodeDaemon(master_name)
221 def _WaitForNodeDaemon(node_name):
222 """Wait for node daemon to become responsive.
225 def _CheckNodeDaemon():
226 # Pylint bug <http://www.logilab.org/ticket/35642>
227 # pylint: disable=E1101
228 result = rpc.BootstrapRunner().call_version([node_name])[node_name]
230 raise utils.RetryAgain()
233 utils.Retry(_CheckNodeDaemon, 1.0, _DAEMON_READY_TIMEOUT)
234 except utils.RetryTimeout:
235 raise errors.OpExecError("Node daemon on %s didn't answer queries within"
236 " %s seconds" % (node_name, _DAEMON_READY_TIMEOUT))
239 def _WaitForMasterDaemon():
240 """Wait for master daemon to become responsive.
243 def _CheckMasterDaemon():
246 (cluster_name, ) = cl.QueryConfigValues(["cluster_name"])
248 raise utils.RetryAgain()
250 logging.debug("Received cluster name %s from master", cluster_name)
253 utils.Retry(_CheckMasterDaemon, 1.0, _DAEMON_READY_TIMEOUT)
254 except utils.RetryTimeout:
255 raise errors.OpExecError("Master daemon didn't answer queries within"
256 " %s seconds" % _DAEMON_READY_TIMEOUT)
259 def RunNodeSetupCmd(cluster_name, node, basecmd, debug, verbose,
260 use_cluster_key, ask_key, strict_host_check, data):
261 """Runs a command to configure something on a remote machine.
263 @type cluster_name: string
264 @param cluster_name: Cluster name
266 @param node: Node name
267 @type basecmd: string
268 @param basecmd: Base command (path on the remote machine)
270 @param debug: Enable debug output
272 @param verbose: Enable verbose output
273 @type use_cluster_key: bool
274 @param use_cluster_key: See L{ssh.SshRunner.BuildCmd}
276 @param ask_key: See L{ssh.SshRunner.BuildCmd}
277 @type strict_host_check: bool
278 @param strict_host_check: See L{ssh.SshRunner.BuildCmd}
279 @param data: JSON-serializable input data for script (passed to stdin)
284 # Pass --debug/--verbose to the external script if set on our invocation
286 cmd.append("--debug")
289 cmd.append("--verbose")
291 family = ssconf.SimpleStore().GetPrimaryIPFamily()
292 srun = ssh.SshRunner(cluster_name,
293 ipv6=(family == netutils.IP6Address.family))
294 scmd = srun.BuildCmd(node, constants.SSH_LOGIN_USER,
295 utils.ShellQuoteArgs(cmd),
296 batch=False, ask_key=ask_key, quiet=False,
297 strict_host_check=strict_host_check,
298 use_cluster_key=use_cluster_key)
300 tempfh = tempfile.TemporaryFile()
302 tempfh.write(serializer.DumpJson(data))
305 result = utils.RunCmd(scmd, interactive=True, input_fd=tempfh)
310 raise errors.OpExecError("Command '%s' failed: %s" %
311 (result.cmd, result.fail_reason))
314 def _InitFileStorage(file_storage_dir):
315 """Initialize if needed the file storage.
317 @param file_storage_dir: the user-supplied value
318 @return: either empty string (if file storage was disabled at build
319 time) or the normalized path to the storage directory
322 file_storage_dir = os.path.normpath(file_storage_dir)
324 if not os.path.isabs(file_storage_dir):
325 raise errors.OpPrereqError("File storage directory '%s' is not an absolute"
326 " path" % file_storage_dir, errors.ECODE_INVAL)
328 if not os.path.exists(file_storage_dir):
330 os.makedirs(file_storage_dir, 0750)
332 raise errors.OpPrereqError("Cannot create file storage directory"
333 " '%s': %s" % (file_storage_dir, err),
334 errors.ECODE_ENVIRON)
336 if not os.path.isdir(file_storage_dir):
337 raise errors.OpPrereqError("The file storage directory '%s' is not"
338 " a directory." % file_storage_dir,
339 errors.ECODE_ENVIRON)
340 return file_storage_dir
343 def InitCluster(cluster_name, mac_prefix, # pylint: disable=R0913, R0914
344 master_netmask, master_netdev, file_storage_dir,
345 shared_file_storage_dir, candidate_pool_size, secondary_ip=None,
346 vg_name=None, beparams=None, nicparams=None, ndparams=None,
347 hvparams=None, diskparams=None, enabled_hypervisors=None,
348 modify_etc_hosts=True, modify_ssh_setup=True,
349 maintain_node_health=False, drbd_helper=None, uid_pool=None,
350 default_iallocator=None, primary_ip_version=None, ipolicy=None,
351 prealloc_wipe_disks=False, use_external_mip_script=False,
352 hv_state=None, disk_state=None):
353 """Initialise the cluster.
355 @type candidate_pool_size: int
356 @param candidate_pool_size: master candidate pool size
359 # TODO: complete the docstring
360 if config.ConfigWriter.IsCluster():
361 raise errors.OpPrereqError("Cluster is already initialised",
364 if not enabled_hypervisors:
365 raise errors.OpPrereqError("Enabled hypervisors list must contain at"
366 " least one member", errors.ECODE_INVAL)
367 invalid_hvs = set(enabled_hypervisors) - constants.HYPER_TYPES
369 raise errors.OpPrereqError("Enabled hypervisors contains invalid"
370 " entries: %s" % invalid_hvs,
374 ipcls = netutils.IPAddress.GetClassFromIpVersion(primary_ip_version)
375 except errors.ProgrammerError:
376 raise errors.OpPrereqError("Invalid primary ip version: %d." %
377 primary_ip_version, errors.ECODE_INVAL)
379 hostname = netutils.GetHostname(family=ipcls.family)
380 if not ipcls.IsValid(hostname.ip):
381 raise errors.OpPrereqError("This host's IP (%s) is not a valid IPv%d"
382 " address." % (hostname.ip, primary_ip_version),
385 if ipcls.IsLoopback(hostname.ip):
386 raise errors.OpPrereqError("This host's IP (%s) resolves to a loopback"
387 " address. Please fix DNS or %s." %
388 (hostname.ip, pathutils.ETC_HOSTS),
389 errors.ECODE_ENVIRON)
391 if not ipcls.Own(hostname.ip):
392 raise errors.OpPrereqError("Inconsistency: this host's name resolves"
393 " to %s,\nbut this ip address does not"
394 " belong to this host" %
395 hostname.ip, errors.ECODE_ENVIRON)
397 clustername = netutils.GetHostname(name=cluster_name, family=ipcls.family)
399 if netutils.TcpPing(clustername.ip, constants.DEFAULT_NODED_PORT, timeout=5):
400 raise errors.OpPrereqError("Cluster IP already active",
401 errors.ECODE_NOTUNIQUE)
404 if primary_ip_version == constants.IP6_VERSION:
405 raise errors.OpPrereqError("When using a IPv6 primary address, a valid"
406 " IPv4 address must be given as secondary",
408 secondary_ip = hostname.ip
410 if not netutils.IP4Address.IsValid(secondary_ip):
411 raise errors.OpPrereqError("Secondary IP address (%s) has to be a valid"
412 " IPv4 address." % secondary_ip,
415 if not netutils.IP4Address.Own(secondary_ip):
416 raise errors.OpPrereqError("You gave %s as secondary IP,"
417 " but it does not belong to this host." %
418 secondary_ip, errors.ECODE_ENVIRON)
420 if master_netmask is not None:
421 if not ipcls.ValidateNetmask(master_netmask):
422 raise errors.OpPrereqError("CIDR netmask (%s) not valid for IPv%s " %
423 (master_netmask, primary_ip_version),
426 master_netmask = ipcls.iplen
428 if vg_name is not None:
429 # Check if volume group is valid
430 vgstatus = utils.CheckVolumeGroupSize(utils.ListVolumeGroups(), vg_name,
431 constants.MIN_VG_SIZE)
433 raise errors.OpPrereqError("Error: %s\nspecify --no-lvm-storage if"
434 " you are not using lvm" % vgstatus,
437 if drbd_helper is not None:
439 curr_helper = bdev.BaseDRBD.GetUsermodeHelper()
440 except errors.BlockDeviceError, err:
441 raise errors.OpPrereqError("Error while checking drbd helper"
442 " (specify --no-drbd-storage if you are not"
443 " using drbd): %s" % str(err),
444 errors.ECODE_ENVIRON)
445 if drbd_helper != curr_helper:
446 raise errors.OpPrereqError("Error: requiring %s as drbd helper but %s"
447 " is the current helper" % (drbd_helper,
451 logging.debug("Stopping daemons (if any are running)")
452 result = utils.RunCmd([pathutils.DAEMON_UTIL, "stop-all"])
454 raise errors.OpExecError("Could not stop daemons, command %s"
455 " had exitcode %s and error '%s'" %
456 (result.cmd, result.exit_code, result.output))
458 if constants.ENABLE_FILE_STORAGE:
459 file_storage_dir = _InitFileStorage(file_storage_dir)
461 file_storage_dir = ""
463 if constants.ENABLE_SHARED_FILE_STORAGE:
464 shared_file_storage_dir = _InitFileStorage(shared_file_storage_dir)
466 shared_file_storage_dir = ""
468 if not re.match("^[0-9a-z]{2}:[0-9a-z]{2}:[0-9a-z]{2}$", mac_prefix):
469 raise errors.OpPrereqError("Invalid mac prefix given '%s'" % mac_prefix,
472 result = utils.RunCmd(["ip", "link", "show", "dev", master_netdev])
474 raise errors.OpPrereqError("Invalid master netdev given (%s): '%s'" %
476 result.output.strip()), errors.ECODE_INVAL)
478 dirs = [(pathutils.RUN_DIR, constants.RUN_DIRS_MODE)]
479 utils.EnsureDirs(dirs)
481 objects.UpgradeBeParams(beparams)
482 utils.ForceDictType(beparams, constants.BES_PARAMETER_TYPES)
483 utils.ForceDictType(nicparams, constants.NICS_PARAMETER_TYPES)
485 objects.NIC.CheckParameterSyntax(nicparams)
487 full_ipolicy = objects.FillIPolicy(constants.IPOLICY_DEFAULTS, ipolicy)
489 if ndparams is not None:
490 utils.ForceDictType(ndparams, constants.NDS_PARAMETER_TYPES)
492 ndparams = dict(constants.NDC_DEFAULTS)
494 # This is ugly, as we modify the dict itself
495 # FIXME: Make utils.ForceDictType pure functional or write a wrapper
498 for hvname, hvs_data in hv_state.items():
499 utils.ForceDictType(hvs_data, constants.HVSTS_PARAMETER_TYPES)
500 hv_state[hvname] = objects.Cluster.SimpleFillHvState(hvs_data)
502 hv_state = dict((hvname, constants.HVST_DEFAULTS)
503 for hvname in enabled_hypervisors)
505 # FIXME: disk_state has no default values yet
507 for storage, ds_data in disk_state.items():
508 if storage not in constants.DS_VALID_TYPES:
509 raise errors.OpPrereqError("Invalid storage type in disk state: %s" %
510 storage, errors.ECODE_INVAL)
511 for ds_name, state in ds_data.items():
512 utils.ForceDictType(state, constants.DSS_PARAMETER_TYPES)
513 ds_data[ds_name] = objects.Cluster.SimpleFillDiskState(state)
515 # hvparams is a mapping of hypervisor->hvparams dict
516 for hv_name, hv_params in hvparams.iteritems():
517 utils.ForceDictType(hv_params, constants.HVS_PARAMETER_TYPES)
518 hv_class = hypervisor.GetHypervisor(hv_name)
519 hv_class.CheckParameterSyntax(hv_params)
521 # diskparams is a mapping of disk-template->diskparams dict
522 for template, dt_params in diskparams.items():
523 param_keys = set(dt_params.keys())
524 default_param_keys = set(constants.DISK_DT_DEFAULTS[template].keys())
525 if not (param_keys <= default_param_keys):
526 unknown_params = param_keys - default_param_keys
527 raise errors.OpPrereqError("Invalid parameters for disk template %s:"
529 utils.CommaJoin(unknown_params)),
531 utils.ForceDictType(dt_params, constants.DISK_DT_TYPES)
533 utils.VerifyDictOptions(diskparams, constants.DISK_DT_DEFAULTS)
534 except errors.OpPrereqError, err:
535 raise errors.OpPrereqError("While verify diskparam options: %s" % err,
538 # set up ssh config and /etc/hosts
539 sshline = utils.ReadFile(pathutils.SSH_HOST_RSA_PUB)
540 sshkey = sshline.split(" ")[1]
543 utils.AddHostToEtcHosts(hostname.name, hostname.ip)
548 if default_iallocator is not None:
549 alloc_script = utils.FindFile(default_iallocator,
550 constants.IALLOCATOR_SEARCH_PATH,
552 if alloc_script is None:
553 raise errors.OpPrereqError("Invalid default iallocator script '%s'"
554 " specified" % default_iallocator,
556 elif constants.HTOOLS:
557 # htools was enabled at build-time, we default to it
558 if utils.FindFile(constants.IALLOC_HAIL,
559 constants.IALLOCATOR_SEARCH_PATH,
561 default_iallocator = constants.IALLOC_HAIL
565 # init of cluster config file
566 cluster_config = objects.Cluster(
568 rsahostkeypub=sshkey,
569 highest_used_port=(constants.FIRST_DRBD_PORT - 1),
570 mac_prefix=mac_prefix,
571 volume_group_name=vg_name,
572 tcpudp_port_pool=set(),
573 master_node=hostname.name,
574 master_ip=clustername.ip,
575 master_netmask=master_netmask,
576 master_netdev=master_netdev,
577 cluster_name=clustername.name,
578 file_storage_dir=file_storage_dir,
579 shared_file_storage_dir=shared_file_storage_dir,
580 enabled_hypervisors=enabled_hypervisors,
581 beparams={constants.PP_DEFAULT: beparams},
582 nicparams={constants.PP_DEFAULT: nicparams},
585 diskparams=diskparams,
586 candidate_pool_size=candidate_pool_size,
587 modify_etc_hosts=modify_etc_hosts,
588 modify_ssh_setup=modify_ssh_setup,
592 maintain_node_health=maintain_node_health,
593 drbd_usermode_helper=drbd_helper,
594 default_iallocator=default_iallocator,
595 primary_ip_family=ipcls.family,
596 prealloc_wipe_disks=prealloc_wipe_disks,
597 use_external_mip_script=use_external_mip_script,
598 ipolicy=full_ipolicy,
599 hv_state_static=hv_state,
600 disk_state_static=disk_state,
602 master_node_config = objects.Node(name=hostname.name,
603 primary_ip=hostname.ip,
604 secondary_ip=secondary_ip,
606 master_candidate=True,
607 offline=False, drained=False,
608 ctime=now, mtime=now,
610 InitConfig(constants.CONFIG_VERSION, cluster_config, master_node_config)
611 cfg = config.ConfigWriter(offline=True)
612 ssh.WriteKnownHostsFile(cfg, pathutils.SSH_KNOWN_HOSTS_FILE)
613 cfg.Update(cfg.GetClusterInfo(), logging.error)
614 ssconf.WriteSsconfFiles(cfg.GetSsconfValues())
616 # set up the inter-node password and certificate
617 _InitGanetiServerSetup(hostname.name)
619 logging.debug("Starting daemons")
620 result = utils.RunCmd([pathutils.DAEMON_UTIL, "start-all"])
622 raise errors.OpExecError("Could not start daemons, command %s"
623 " had exitcode %s and error %s" %
624 (result.cmd, result.exit_code, result.output))
626 _WaitForMasterDaemon()
629 def InitConfig(version, cluster_config, master_node_config,
630 cfg_file=pathutils.CLUSTER_CONF_FILE):
631 """Create the initial cluster configuration.
633 It will contain the current node, which will also be the master
634 node, and no instances.
637 @param version: configuration version
638 @type cluster_config: L{objects.Cluster}
639 @param cluster_config: cluster configuration
640 @type master_node_config: L{objects.Node}
641 @param master_node_config: master node configuration
642 @type cfg_file: string
643 @param cfg_file: configuration file path
646 uuid_generator = config.TemporaryReservationManager()
647 cluster_config.uuid = uuid_generator.Generate([], utils.NewUUID,
649 master_node_config.uuid = uuid_generator.Generate([], utils.NewUUID,
652 master_node_config.name: master_node_config,
654 default_nodegroup = objects.NodeGroup(
655 uuid=uuid_generator.Generate([], utils.NewUUID, _INITCONF_ECID),
656 name=constants.INITIAL_NODE_GROUP_NAME,
657 members=[master_node_config.name],
661 default_nodegroup.uuid: default_nodegroup,
664 config_data = objects.ConfigData(version=version,
665 cluster=cluster_config,
666 nodegroups=nodegroups,
671 ctime=now, mtime=now)
672 utils.WriteFile(cfg_file,
673 data=serializer.Dump(config_data.ToDict()),
677 def FinalizeClusterDestroy(master):
678 """Execute the last steps of cluster destroy
680 This function shuts down all the daemons, completing the destroy
681 begun in cmdlib.LUDestroyOpcode.
684 cfg = config.ConfigWriter()
685 modify_ssh_setup = cfg.GetClusterInfo().modify_ssh_setup
686 runner = rpc.BootstrapRunner()
688 master_params = cfg.GetMasterNetworkParameters()
689 master_params.name = master
690 ems = cfg.GetUseExternalMipScript()
691 result = runner.call_node_deactivate_master_ip(master_params.name,
694 msg = result.fail_msg
696 logging.warning("Could not disable the master IP: %s", msg)
698 result = runner.call_node_stop_master(master)
699 msg = result.fail_msg
701 logging.warning("Could not disable the master role: %s", msg)
703 result = runner.call_node_leave_cluster(master, modify_ssh_setup)
704 msg = result.fail_msg
706 logging.warning("Could not shutdown the node daemon and cleanup"
707 " the node: %s", msg)
710 def SetupNodeDaemon(opts, cluster_name, node):
711 """Add a node to the cluster.
713 This function must be called before the actual opcode, and will ssh
714 to the remote node, copy the needed files, and start ganeti-noded,
715 allowing the master to do the rest via normal rpc calls.
717 @param cluster_name: the cluster name
718 @param node: the name of the new node
722 constants.NDS_CLUSTER_NAME: cluster_name,
723 constants.NDS_NODE_DAEMON_CERTIFICATE:
724 utils.ReadFile(pathutils.NODED_CERT_FILE),
725 constants.NDS_SSCONF: ssconf.SimpleStore().ReadAll(),
726 constants.NDS_START_NODE_DAEMON: True,
729 RunNodeSetupCmd(cluster_name, node, pathutils.NODE_DAEMON_SETUP,
730 opts.debug, opts.verbose,
731 True, opts.ssh_key_check, opts.ssh_key_check, data)
733 _WaitForNodeDaemon(node)
736 def MasterFailover(no_voting=False):
737 """Failover the master node.
739 This checks that we are not already the master, and will cause the
740 current master to cease being master, and the non-master to become
743 @type no_voting: boolean
744 @param no_voting: force the operation without remote nodes agreement
748 sstore = ssconf.SimpleStore()
750 old_master, new_master = ssconf.GetMasterAndMyself(sstore)
751 node_list = sstore.GetNodeList()
752 mc_list = sstore.GetMasterCandidates()
754 if old_master == new_master:
755 raise errors.OpPrereqError("This commands must be run on the node"
756 " where you want the new master to be."
757 " %s is already the master" %
758 old_master, errors.ECODE_INVAL)
760 if new_master not in mc_list:
761 mc_no_master = [name for name in mc_list if name != old_master]
762 raise errors.OpPrereqError("This node is not among the nodes marked"
763 " as master candidates. Only these nodes"
764 " can become masters. Current list of"
765 " master candidates is:\n"
766 "%s" % ("\n".join(mc_no_master)),
770 vote_list = GatherMasterVotes(node_list)
773 voted_master = vote_list[0][0]
774 if voted_master is None:
775 raise errors.OpPrereqError("Cluster is inconsistent, most nodes did"
776 " not respond.", errors.ECODE_ENVIRON)
777 elif voted_master != old_master:
778 raise errors.OpPrereqError("I have a wrong configuration, I believe"
779 " the master is %s but the other nodes"
780 " voted %s. Please resync the configuration"
782 (old_master, voted_master),
788 logging.info("Setting master to %s, old master: %s", new_master, old_master)
791 # instantiate a real config writer, as we now know we have the
793 cfg = config.ConfigWriter(accept_foreign=True)
795 cluster_info = cfg.GetClusterInfo()
796 cluster_info.master_node = new_master
797 # this will also regenerate the ssconf files, since we updated the
799 cfg.Update(cluster_info, logging.error)
800 except errors.ConfigurationError, err:
801 logging.error("Error while trying to set the new master: %s",
805 # if cfg.Update worked, then it means the old master daemon won't be
806 # able now to write its own config file (we rely on locking in both
807 # backend.UploadFile() and ConfigWriter._Write(); hence the next
808 # step is to kill the old master
810 logging.info("Stopping the master daemon on node %s", old_master)
812 runner = rpc.BootstrapRunner()
813 master_params = cfg.GetMasterNetworkParameters()
814 master_params.name = old_master
815 ems = cfg.GetUseExternalMipScript()
816 result = runner.call_node_deactivate_master_ip(master_params.name,
819 msg = result.fail_msg
821 logging.warning("Could not disable the master IP: %s", msg)
823 result = runner.call_node_stop_master(old_master)
824 msg = result.fail_msg
826 logging.error("Could not disable the master role on the old master"
827 " %s, please disable manually: %s", old_master, msg)
829 logging.info("Checking master IP non-reachability...")
831 master_ip = sstore.GetMasterIP()
834 # Here we have a phase where no master should be running
836 if netutils.TcpPing(master_ip, constants.DEFAULT_NODED_PORT):
837 raise utils.RetryAgain()
840 utils.Retry(_check_ip, (1, 1.5, 5), total_timeout)
841 except utils.RetryTimeout:
842 logging.warning("The master IP is still reachable after %s seconds,"
843 " continuing but activating the master on the current"
844 " node will probably fail", total_timeout)
846 if jstore.CheckDrainFlag():
847 logging.info("Undraining job queue")
848 jstore.SetDrainFlag(False)
850 logging.info("Starting the master daemons on the new master")
852 result = rpc.BootstrapRunner().call_node_start_master_daemons(new_master,
854 msg = result.fail_msg
856 logging.error("Could not start the master role on the new master"
857 " %s, please check: %s", new_master, msg)
860 logging.info("Master failed over from %s to %s", old_master, new_master)
865 """Returns the current master node.
867 This is a separate function in bootstrap since it's needed by
868 gnt-cluster, and instead of importing directly ssconf, it's better
869 to abstract it in bootstrap, where we do use ssconf in other
873 sstore = ssconf.SimpleStore()
875 old_master, _ = ssconf.GetMasterAndMyself(sstore)
880 def GatherMasterVotes(node_list):
881 """Check the agreement on who is the master.
883 This function will return a list of (node, number of votes), ordered
884 by the number of votes. Errors will be denoted by the key 'None'.
886 Note that the sum of votes is the number of nodes this machine
887 knows, whereas the number of entries in the list could be different
888 (if some nodes vote for another master).
890 We remove ourselves from the list since we know that (bugs aside)
891 since we use the same source for configuration information for both
892 backend and boostrap, we'll always vote for ourselves.
894 @type node_list: list
895 @param node_list: the list of nodes to query for master info; the current
896 node will be removed if it is in the list
898 @return: list of (node, votes)
901 myself = netutils.Hostname.GetSysName()
903 node_list.remove(myself)
907 # no nodes left (eventually after removing myself)
909 results = rpc.BootstrapRunner().call_master_info(node_list)
910 if not isinstance(results, dict):
911 # this should not happen (unless internal error in rpc)
912 logging.critical("Can't complete rpc call, aborting master startup")
913 return [(None, len(node_list))]
921 logging.warning("Error contacting node %s: %s", node, msg)
923 # for now we accept both length 3, 4 and 5 (data[3] is primary ip version
924 # and data[4] is the master netmask)
925 elif not isinstance(data, (tuple, list)) or len(data) < 3:
926 logging.warning("Invalid data received from node %s: %s", node, data)
929 if None not in votes:
933 master_node = data[2]
934 if master_node not in votes:
935 votes[master_node] = 0
936 votes[master_node] += 1
938 vote_list = [v for v in votes.items()]
939 # sort first on number of votes then on name, since we want None
940 # sorted later if we have the half of the nodes not responding, and
941 # half voting all for the same master
942 vote_list.sort(key=lambda x: (x[1], x[0]), reverse=True)