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 srun = ssh.SshRunner(cluster_name)
292 scmd = srun.BuildCmd(node, constants.SSH_LOGIN_USER,
293 utils.ShellQuoteArgs(cmd),
294 batch=False, ask_key=ask_key, quiet=False,
295 strict_host_check=strict_host_check,
296 use_cluster_key=use_cluster_key)
298 tempfh = tempfile.TemporaryFile()
300 tempfh.write(serializer.DumpJson(data))
303 result = utils.RunCmd(scmd, interactive=True, input_fd=tempfh)
308 raise errors.OpExecError("Command '%s' failed: %s" %
309 (result.cmd, result.fail_reason))
312 def _InitFileStorage(file_storage_dir):
313 """Initialize if needed the file storage.
315 @param file_storage_dir: the user-supplied value
316 @return: either empty string (if file storage was disabled at build
317 time) or the normalized path to the storage directory
320 file_storage_dir = os.path.normpath(file_storage_dir)
322 if not os.path.isabs(file_storage_dir):
323 raise errors.OpPrereqError("File storage directory '%s' is not an absolute"
324 " path" % file_storage_dir, errors.ECODE_INVAL)
326 if not os.path.exists(file_storage_dir):
328 os.makedirs(file_storage_dir, 0750)
330 raise errors.OpPrereqError("Cannot create file storage directory"
331 " '%s': %s" % (file_storage_dir, err),
332 errors.ECODE_ENVIRON)
334 if not os.path.isdir(file_storage_dir):
335 raise errors.OpPrereqError("The file storage directory '%s' is not"
336 " a directory." % file_storage_dir,
337 errors.ECODE_ENVIRON)
338 return file_storage_dir
341 def InitCluster(cluster_name, mac_prefix, # pylint: disable=R0913, R0914
342 master_netmask, master_netdev, file_storage_dir,
343 shared_file_storage_dir, candidate_pool_size, secondary_ip=None,
344 vg_name=None, beparams=None, nicparams=None, ndparams=None,
345 hvparams=None, diskparams=None, enabled_hypervisors=None,
346 modify_etc_hosts=True, modify_ssh_setup=True,
347 maintain_node_health=False, drbd_helper=None, uid_pool=None,
348 default_iallocator=None, primary_ip_version=None, ipolicy=None,
349 prealloc_wipe_disks=False, use_external_mip_script=False,
350 hv_state=None, disk_state=None):
351 """Initialise the cluster.
353 @type candidate_pool_size: int
354 @param candidate_pool_size: master candidate pool size
357 # TODO: complete the docstring
358 if config.ConfigWriter.IsCluster():
359 raise errors.OpPrereqError("Cluster is already initialised",
362 if not enabled_hypervisors:
363 raise errors.OpPrereqError("Enabled hypervisors list must contain at"
364 " least one member", errors.ECODE_INVAL)
365 invalid_hvs = set(enabled_hypervisors) - constants.HYPER_TYPES
367 raise errors.OpPrereqError("Enabled hypervisors contains invalid"
368 " entries: %s" % invalid_hvs,
372 ipcls = netutils.IPAddress.GetClassFromIpVersion(primary_ip_version)
373 except errors.ProgrammerError:
374 raise errors.OpPrereqError("Invalid primary ip version: %d." %
375 primary_ip_version, errors.ECODE_INVAL)
377 hostname = netutils.GetHostname(family=ipcls.family)
378 if not ipcls.IsValid(hostname.ip):
379 raise errors.OpPrereqError("This host's IP (%s) is not a valid IPv%d"
380 " address." % (hostname.ip, primary_ip_version),
383 if ipcls.IsLoopback(hostname.ip):
384 raise errors.OpPrereqError("This host's IP (%s) resolves to a loopback"
385 " address. Please fix DNS or %s." %
386 (hostname.ip, pathutils.ETC_HOSTS),
387 errors.ECODE_ENVIRON)
389 if not ipcls.Own(hostname.ip):
390 raise errors.OpPrereqError("Inconsistency: this host's name resolves"
391 " to %s,\nbut this ip address does not"
392 " belong to this host" %
393 hostname.ip, errors.ECODE_ENVIRON)
395 clustername = netutils.GetHostname(name=cluster_name, family=ipcls.family)
397 if netutils.TcpPing(clustername.ip, constants.DEFAULT_NODED_PORT, timeout=5):
398 raise errors.OpPrereqError("Cluster IP already active",
399 errors.ECODE_NOTUNIQUE)
402 if primary_ip_version == constants.IP6_VERSION:
403 raise errors.OpPrereqError("When using a IPv6 primary address, a valid"
404 " IPv4 address must be given as secondary",
406 secondary_ip = hostname.ip
408 if not netutils.IP4Address.IsValid(secondary_ip):
409 raise errors.OpPrereqError("Secondary IP address (%s) has to be a valid"
410 " IPv4 address." % secondary_ip,
413 if not netutils.IP4Address.Own(secondary_ip):
414 raise errors.OpPrereqError("You gave %s as secondary IP,"
415 " but it does not belong to this host." %
416 secondary_ip, errors.ECODE_ENVIRON)
418 if master_netmask is not None:
419 if not ipcls.ValidateNetmask(master_netmask):
420 raise errors.OpPrereqError("CIDR netmask (%s) not valid for IPv%s " %
421 (master_netmask, primary_ip_version),
424 master_netmask = ipcls.iplen
426 if vg_name is not None:
427 # Check if volume group is valid
428 vgstatus = utils.CheckVolumeGroupSize(utils.ListVolumeGroups(), vg_name,
429 constants.MIN_VG_SIZE)
431 raise errors.OpPrereqError("Error: %s\nspecify --no-lvm-storage if"
432 " you are not using lvm" % vgstatus,
435 if drbd_helper is not None:
437 curr_helper = bdev.BaseDRBD.GetUsermodeHelper()
438 except errors.BlockDeviceError, err:
439 raise errors.OpPrereqError("Error while checking drbd helper"
440 " (specify --no-drbd-storage if you are not"
441 " using drbd): %s" % str(err),
442 errors.ECODE_ENVIRON)
443 if drbd_helper != curr_helper:
444 raise errors.OpPrereqError("Error: requiring %s as drbd helper but %s"
445 " is the current helper" % (drbd_helper,
449 if constants.ENABLE_FILE_STORAGE:
450 file_storage_dir = _InitFileStorage(file_storage_dir)
452 file_storage_dir = ""
454 if constants.ENABLE_SHARED_FILE_STORAGE:
455 shared_file_storage_dir = _InitFileStorage(shared_file_storage_dir)
457 shared_file_storage_dir = ""
459 if not re.match("^[0-9a-z]{2}:[0-9a-z]{2}:[0-9a-z]{2}$", mac_prefix):
460 raise errors.OpPrereqError("Invalid mac prefix given '%s'" % mac_prefix,
463 result = utils.RunCmd(["ip", "link", "show", "dev", master_netdev])
465 raise errors.OpPrereqError("Invalid master netdev given (%s): '%s'" %
467 result.output.strip()), errors.ECODE_INVAL)
469 dirs = [(pathutils.RUN_DIR, constants.RUN_DIRS_MODE)]
470 utils.EnsureDirs(dirs)
472 objects.UpgradeBeParams(beparams)
473 utils.ForceDictType(beparams, constants.BES_PARAMETER_TYPES)
474 utils.ForceDictType(nicparams, constants.NICS_PARAMETER_TYPES)
476 objects.NIC.CheckParameterSyntax(nicparams)
478 full_ipolicy = objects.FillIPolicy(constants.IPOLICY_DEFAULTS, ipolicy)
480 if ndparams is not None:
481 utils.ForceDictType(ndparams, constants.NDS_PARAMETER_TYPES)
483 ndparams = dict(constants.NDC_DEFAULTS)
485 # This is ugly, as we modify the dict itself
486 # FIXME: Make utils.ForceDictType pure functional or write a wrapper
489 for hvname, hvs_data in hv_state.items():
490 utils.ForceDictType(hvs_data, constants.HVSTS_PARAMETER_TYPES)
491 hv_state[hvname] = objects.Cluster.SimpleFillHvState(hvs_data)
493 hv_state = dict((hvname, constants.HVST_DEFAULTS)
494 for hvname in enabled_hypervisors)
496 # FIXME: disk_state has no default values yet
498 for storage, ds_data in disk_state.items():
499 if storage not in constants.DS_VALID_TYPES:
500 raise errors.OpPrereqError("Invalid storage type in disk state: %s" %
501 storage, errors.ECODE_INVAL)
502 for ds_name, state in ds_data.items():
503 utils.ForceDictType(state, constants.DSS_PARAMETER_TYPES)
504 ds_data[ds_name] = objects.Cluster.SimpleFillDiskState(state)
506 # hvparams is a mapping of hypervisor->hvparams dict
507 for hv_name, hv_params in hvparams.iteritems():
508 utils.ForceDictType(hv_params, constants.HVS_PARAMETER_TYPES)
509 hv_class = hypervisor.GetHypervisor(hv_name)
510 hv_class.CheckParameterSyntax(hv_params)
512 # diskparams is a mapping of disk-template->diskparams dict
513 for template, dt_params in diskparams.items():
514 param_keys = set(dt_params.keys())
515 default_param_keys = set(constants.DISK_DT_DEFAULTS[template].keys())
516 if not (param_keys <= default_param_keys):
517 unknown_params = param_keys - default_param_keys
518 raise errors.OpPrereqError("Invalid parameters for disk template %s:"
520 utils.CommaJoin(unknown_params)),
522 utils.ForceDictType(dt_params, constants.DISK_DT_TYPES)
524 utils.VerifyDictOptions(diskparams, constants.DISK_DT_DEFAULTS)
525 except errors.OpPrereqError, err:
526 raise errors.OpPrereqError("While verify diskparam options: %s" % err,
529 # set up ssh config and /etc/hosts
530 sshline = utils.ReadFile(pathutils.SSH_HOST_RSA_PUB)
531 sshkey = sshline.split(" ")[1]
534 utils.AddHostToEtcHosts(hostname.name, hostname.ip)
539 if default_iallocator is not None:
540 alloc_script = utils.FindFile(default_iallocator,
541 constants.IALLOCATOR_SEARCH_PATH,
543 if alloc_script is None:
544 raise errors.OpPrereqError("Invalid default iallocator script '%s'"
545 " specified" % default_iallocator,
547 elif constants.HTOOLS:
548 # htools was enabled at build-time, we default to it
549 if utils.FindFile(constants.IALLOC_HAIL,
550 constants.IALLOCATOR_SEARCH_PATH,
552 default_iallocator = constants.IALLOC_HAIL
556 # init of cluster config file
557 cluster_config = objects.Cluster(
559 rsahostkeypub=sshkey,
560 highest_used_port=(constants.FIRST_DRBD_PORT - 1),
561 mac_prefix=mac_prefix,
562 volume_group_name=vg_name,
563 tcpudp_port_pool=set(),
564 master_node=hostname.name,
565 master_ip=clustername.ip,
566 master_netmask=master_netmask,
567 master_netdev=master_netdev,
568 cluster_name=clustername.name,
569 file_storage_dir=file_storage_dir,
570 shared_file_storage_dir=shared_file_storage_dir,
571 enabled_hypervisors=enabled_hypervisors,
572 beparams={constants.PP_DEFAULT: beparams},
573 nicparams={constants.PP_DEFAULT: nicparams},
576 diskparams=diskparams,
577 candidate_pool_size=candidate_pool_size,
578 modify_etc_hosts=modify_etc_hosts,
579 modify_ssh_setup=modify_ssh_setup,
583 maintain_node_health=maintain_node_health,
584 drbd_usermode_helper=drbd_helper,
585 default_iallocator=default_iallocator,
586 primary_ip_family=ipcls.family,
587 prealloc_wipe_disks=prealloc_wipe_disks,
588 use_external_mip_script=use_external_mip_script,
589 ipolicy=full_ipolicy,
590 hv_state_static=hv_state,
591 disk_state_static=disk_state,
593 master_node_config = objects.Node(name=hostname.name,
594 primary_ip=hostname.ip,
595 secondary_ip=secondary_ip,
597 master_candidate=True,
598 offline=False, drained=False,
599 ctime=now, mtime=now,
601 InitConfig(constants.CONFIG_VERSION, cluster_config, master_node_config)
602 cfg = config.ConfigWriter(offline=True)
603 ssh.WriteKnownHostsFile(cfg, pathutils.SSH_KNOWN_HOSTS_FILE)
604 cfg.Update(cfg.GetClusterInfo(), logging.error)
605 ssconf.WriteSsconfFiles(cfg.GetSsconfValues())
607 # set up the inter-node password and certificate
608 _InitGanetiServerSetup(hostname.name)
610 logging.debug("Starting daemons")
611 result = utils.RunCmd([pathutils.DAEMON_UTIL, "start-all"])
613 raise errors.OpExecError("Could not start daemons, command %s"
614 " had exitcode %s and error %s" %
615 (result.cmd, result.exit_code, result.output))
617 _WaitForMasterDaemon()
620 def InitConfig(version, cluster_config, master_node_config,
621 cfg_file=pathutils.CLUSTER_CONF_FILE):
622 """Create the initial cluster configuration.
624 It will contain the current node, which will also be the master
625 node, and no instances.
628 @param version: configuration version
629 @type cluster_config: L{objects.Cluster}
630 @param cluster_config: cluster configuration
631 @type master_node_config: L{objects.Node}
632 @param master_node_config: master node configuration
633 @type cfg_file: string
634 @param cfg_file: configuration file path
637 uuid_generator = config.TemporaryReservationManager()
638 cluster_config.uuid = uuid_generator.Generate([], utils.NewUUID,
640 master_node_config.uuid = uuid_generator.Generate([], utils.NewUUID,
643 master_node_config.name: master_node_config,
645 default_nodegroup = objects.NodeGroup(
646 uuid=uuid_generator.Generate([], utils.NewUUID, _INITCONF_ECID),
647 name=constants.INITIAL_NODE_GROUP_NAME,
648 members=[master_node_config.name],
652 default_nodegroup.uuid: default_nodegroup,
655 config_data = objects.ConfigData(version=version,
656 cluster=cluster_config,
657 nodegroups=nodegroups,
662 ctime=now, mtime=now)
663 utils.WriteFile(cfg_file,
664 data=serializer.Dump(config_data.ToDict()),
668 def FinalizeClusterDestroy(master):
669 """Execute the last steps of cluster destroy
671 This function shuts down all the daemons, completing the destroy
672 begun in cmdlib.LUDestroyOpcode.
675 cfg = config.ConfigWriter()
676 modify_ssh_setup = cfg.GetClusterInfo().modify_ssh_setup
677 runner = rpc.BootstrapRunner()
679 master_params = cfg.GetMasterNetworkParameters()
680 master_params.name = master
681 ems = cfg.GetUseExternalMipScript()
682 result = runner.call_node_deactivate_master_ip(master_params.name,
685 msg = result.fail_msg
687 logging.warning("Could not disable the master IP: %s", msg)
689 result = runner.call_node_stop_master(master)
690 msg = result.fail_msg
692 logging.warning("Could not disable the master role: %s", msg)
694 result = runner.call_node_leave_cluster(master, modify_ssh_setup)
695 msg = result.fail_msg
697 logging.warning("Could not shutdown the node daemon and cleanup"
698 " the node: %s", msg)
701 def SetupNodeDaemon(cluster_name, node, ssh_key_check):
702 """Add a node to the cluster.
704 This function must be called before the actual opcode, and will ssh
705 to the remote node, copy the needed files, and start ganeti-noded,
706 allowing the master to do the rest via normal rpc calls.
708 @param cluster_name: the cluster name
709 @param node: the name of the new node
710 @param ssh_key_check: whether to do a strict key check
713 sstore = ssconf.SimpleStore()
714 family = sstore.GetPrimaryIPFamily()
715 sshrunner = ssh.SshRunner(cluster_name,
716 ipv6=(family == netutils.IP6Address.family))
718 # set up inter-node password and certificate and restarts the node daemon
719 # and then connect with ssh to set password and start ganeti-noded
720 # note that all the below variables are sanitized at this point,
721 # either by being constants or by the checks above
722 sshrunner.CopyFileToNode(node, pathutils.NODED_CERT_FILE)
723 sshrunner.CopyFileToNode(node, pathutils.RAPI_CERT_FILE)
724 sshrunner.CopyFileToNode(node, pathutils.SPICE_CERT_FILE)
725 sshrunner.CopyFileToNode(node, pathutils.SPICE_CACERT_FILE)
726 sshrunner.CopyFileToNode(node, pathutils.CONFD_HMAC_KEY)
727 for filename in sstore.GetFileList():
728 sshrunner.CopyFileToNode(node, filename)
729 mycommand = ("%s stop-all; %s start %s" %
730 (pathutils.DAEMON_UTIL, pathutils.DAEMON_UTIL, constants.NODED))
732 result = sshrunner.Run(node, constants.SSH_LOGIN_USER, mycommand, batch=False,
733 ask_key=ssh_key_check,
734 use_cluster_key=True,
735 strict_host_check=ssh_key_check)
737 raise errors.OpExecError("Remote command on node %s, error: %s,"
739 (node, result.fail_reason, result.output))
741 _WaitForNodeDaemon(node)
744 def MasterFailover(no_voting=False):
745 """Failover the master node.
747 This checks that we are not already the master, and will cause the
748 current master to cease being master, and the non-master to become
751 @type no_voting: boolean
752 @param no_voting: force the operation without remote nodes agreement
756 sstore = ssconf.SimpleStore()
758 old_master, new_master = ssconf.GetMasterAndMyself(sstore)
759 node_list = sstore.GetNodeList()
760 mc_list = sstore.GetMasterCandidates()
762 if old_master == new_master:
763 raise errors.OpPrereqError("This commands must be run on the node"
764 " where you want the new master to be."
765 " %s is already the master" %
766 old_master, errors.ECODE_INVAL)
768 if new_master not in mc_list:
769 mc_no_master = [name for name in mc_list if name != old_master]
770 raise errors.OpPrereqError("This node is not among the nodes marked"
771 " as master candidates. Only these nodes"
772 " can become masters. Current list of"
773 " master candidates is:\n"
774 "%s" % ("\n".join(mc_no_master)),
778 vote_list = GatherMasterVotes(node_list)
781 voted_master = vote_list[0][0]
782 if voted_master is None:
783 raise errors.OpPrereqError("Cluster is inconsistent, most nodes did"
784 " not respond.", errors.ECODE_ENVIRON)
785 elif voted_master != old_master:
786 raise errors.OpPrereqError("I have a wrong configuration, I believe"
787 " the master is %s but the other nodes"
788 " voted %s. Please resync the configuration"
790 (old_master, voted_master),
796 logging.info("Setting master to %s, old master: %s", new_master, old_master)
799 # instantiate a real config writer, as we now know we have the
801 cfg = config.ConfigWriter(accept_foreign=True)
803 cluster_info = cfg.GetClusterInfo()
804 cluster_info.master_node = new_master
805 # this will also regenerate the ssconf files, since we updated the
807 cfg.Update(cluster_info, logging.error)
808 except errors.ConfigurationError, err:
809 logging.error("Error while trying to set the new master: %s",
813 # if cfg.Update worked, then it means the old master daemon won't be
814 # able now to write its own config file (we rely on locking in both
815 # backend.UploadFile() and ConfigWriter._Write(); hence the next
816 # step is to kill the old master
818 logging.info("Stopping the master daemon on node %s", old_master)
820 runner = rpc.BootstrapRunner()
821 master_params = cfg.GetMasterNetworkParameters()
822 master_params.name = old_master
823 ems = cfg.GetUseExternalMipScript()
824 result = runner.call_node_deactivate_master_ip(master_params.name,
827 msg = result.fail_msg
829 logging.warning("Could not disable the master IP: %s", msg)
831 result = runner.call_node_stop_master(old_master)
832 msg = result.fail_msg
834 logging.error("Could not disable the master role on the old master"
835 " %s, please disable manually: %s", old_master, msg)
837 logging.info("Checking master IP non-reachability...")
839 master_ip = sstore.GetMasterIP()
842 # Here we have a phase where no master should be running
844 if netutils.TcpPing(master_ip, constants.DEFAULT_NODED_PORT):
845 raise utils.RetryAgain()
848 utils.Retry(_check_ip, (1, 1.5, 5), total_timeout)
849 except utils.RetryTimeout:
850 logging.warning("The master IP is still reachable after %s seconds,"
851 " continuing but activating the master on the current"
852 " node will probably fail", total_timeout)
854 if jstore.CheckDrainFlag():
855 logging.info("Undraining job queue")
856 jstore.SetDrainFlag(False)
858 logging.info("Starting the master daemons on the new master")
860 result = rpc.BootstrapRunner().call_node_start_master_daemons(new_master,
862 msg = result.fail_msg
864 logging.error("Could not start the master role on the new master"
865 " %s, please check: %s", new_master, msg)
868 logging.info("Master failed over from %s to %s", old_master, new_master)
873 """Returns the current master node.
875 This is a separate function in bootstrap since it's needed by
876 gnt-cluster, and instead of importing directly ssconf, it's better
877 to abstract it in bootstrap, where we do use ssconf in other
881 sstore = ssconf.SimpleStore()
883 old_master, _ = ssconf.GetMasterAndMyself(sstore)
888 def GatherMasterVotes(node_list):
889 """Check the agreement on who is the master.
891 This function will return a list of (node, number of votes), ordered
892 by the number of votes. Errors will be denoted by the key 'None'.
894 Note that the sum of votes is the number of nodes this machine
895 knows, whereas the number of entries in the list could be different
896 (if some nodes vote for another master).
898 We remove ourselves from the list since we know that (bugs aside)
899 since we use the same source for configuration information for both
900 backend and boostrap, we'll always vote for ourselves.
902 @type node_list: list
903 @param node_list: the list of nodes to query for master info; the current
904 node will be removed if it is in the list
906 @return: list of (node, votes)
909 myself = netutils.Hostname.GetSysName()
911 node_list.remove(myself)
915 # no nodes left (eventually after removing myself)
917 results = rpc.BootstrapRunner().call_master_info(node_list)
918 if not isinstance(results, dict):
919 # this should not happen (unless internal error in rpc)
920 logging.critical("Can't complete rpc call, aborting master startup")
921 return [(None, len(node_list))]
929 logging.warning("Error contacting node %s: %s", node, msg)
931 # for now we accept both length 3, 4 and 5 (data[3] is primary ip version
932 # and data[4] is the master netmask)
933 elif not isinstance(data, (tuple, list)) or len(data) < 3:
934 logging.warning("Invalid data received from node %s: %s", node, data)
937 if None not in votes:
941 master_node = data[2]
942 if master_node not in votes:
943 votes[master_node] = 0
944 votes[master_node] += 1
946 vote_list = [v for v in votes.items()]
947 # sort first on number of votes then on name, since we want None
948 # sorted later if we have the half of the nodes not responding, and
949 # half voting all for the same master
950 vote_list.sort(key=lambda x: (x[1], x[0]), reverse=True)