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 # Pylint bug <http://www.logilab.org/ticket/35642>
226 # pylint: disable=E1101
227 result = rpc.BootstrapRunner().call_version([node_name])[node_name]
229 raise utils.RetryAgain()
232 utils.Retry(_CheckNodeDaemon, 1.0, _DAEMON_READY_TIMEOUT)
233 except utils.RetryTimeout:
234 raise errors.OpExecError("Node daemon on %s didn't answer queries within"
235 " %s seconds" % (node_name, _DAEMON_READY_TIMEOUT))
238 def _WaitForMasterDaemon():
239 """Wait for master daemon to become responsive.
242 def _CheckMasterDaemon():
245 (cluster_name, ) = cl.QueryConfigValues(["cluster_name"])
247 raise utils.RetryAgain()
249 logging.debug("Received cluster name %s from master", cluster_name)
252 utils.Retry(_CheckMasterDaemon, 1.0, _DAEMON_READY_TIMEOUT)
253 except utils.RetryTimeout:
254 raise errors.OpExecError("Master daemon didn't answer queries within"
255 " %s seconds" % _DAEMON_READY_TIMEOUT)
258 def _InitFileStorage(file_storage_dir):
259 """Initialize if needed the file storage.
261 @param file_storage_dir: the user-supplied value
262 @return: either empty string (if file storage was disabled at build
263 time) or the normalized path to the storage directory
266 file_storage_dir = os.path.normpath(file_storage_dir)
268 if not os.path.isabs(file_storage_dir):
269 raise errors.OpPrereqError("File storage directory '%s' is not an absolute"
270 " path" % file_storage_dir, errors.ECODE_INVAL)
272 if not os.path.exists(file_storage_dir):
274 os.makedirs(file_storage_dir, 0750)
276 raise errors.OpPrereqError("Cannot create file storage directory"
277 " '%s': %s" % (file_storage_dir, err),
278 errors.ECODE_ENVIRON)
280 if not os.path.isdir(file_storage_dir):
281 raise errors.OpPrereqError("The file storage directory '%s' is not"
282 " a directory." % file_storage_dir,
283 errors.ECODE_ENVIRON)
284 return file_storage_dir
287 def InitCluster(cluster_name, mac_prefix, # pylint: disable=R0913, R0914
288 master_netmask, master_netdev, file_storage_dir,
289 shared_file_storage_dir, candidate_pool_size, secondary_ip=None,
290 vg_name=None, beparams=None, nicparams=None, ndparams=None,
291 hvparams=None, diskparams=None, enabled_hypervisors=None,
292 modify_etc_hosts=True, modify_ssh_setup=True,
293 maintain_node_health=False, drbd_helper=None, uid_pool=None,
294 default_iallocator=None, primary_ip_version=None, ipolicy=None,
295 prealloc_wipe_disks=False, use_external_mip_script=False,
296 hv_state=None, disk_state=None):
297 """Initialise the cluster.
299 @type candidate_pool_size: int
300 @param candidate_pool_size: master candidate pool size
303 # TODO: complete the docstring
304 if config.ConfigWriter.IsCluster():
305 raise errors.OpPrereqError("Cluster is already initialised",
308 if not enabled_hypervisors:
309 raise errors.OpPrereqError("Enabled hypervisors list must contain at"
310 " least one member", errors.ECODE_INVAL)
311 invalid_hvs = set(enabled_hypervisors) - constants.HYPER_TYPES
313 raise errors.OpPrereqError("Enabled hypervisors contains invalid"
314 " entries: %s" % invalid_hvs,
318 ipcls = netutils.IPAddress.GetClassFromIpVersion(primary_ip_version)
319 except errors.ProgrammerError:
320 raise errors.OpPrereqError("Invalid primary ip version: %d." %
321 primary_ip_version, errors.ECODE_INVAL)
323 hostname = netutils.GetHostname(family=ipcls.family)
324 if not ipcls.IsValid(hostname.ip):
325 raise errors.OpPrereqError("This host's IP (%s) is not a valid IPv%d"
326 " address." % (hostname.ip, primary_ip_version),
329 if ipcls.IsLoopback(hostname.ip):
330 raise errors.OpPrereqError("This host's IP (%s) resolves to a loopback"
331 " address. Please fix DNS or %s." %
332 (hostname.ip, constants.ETC_HOSTS),
333 errors.ECODE_ENVIRON)
335 if not ipcls.Own(hostname.ip):
336 raise errors.OpPrereqError("Inconsistency: this host's name resolves"
337 " to %s,\nbut this ip address does not"
338 " belong to this host" %
339 hostname.ip, errors.ECODE_ENVIRON)
341 clustername = netutils.GetHostname(name=cluster_name, family=ipcls.family)
343 if netutils.TcpPing(clustername.ip, constants.DEFAULT_NODED_PORT, timeout=5):
344 raise errors.OpPrereqError("Cluster IP already active",
345 errors.ECODE_NOTUNIQUE)
348 if primary_ip_version == constants.IP6_VERSION:
349 raise errors.OpPrereqError("When using a IPv6 primary address, a valid"
350 " IPv4 address must be given as secondary",
352 secondary_ip = hostname.ip
354 if not netutils.IP4Address.IsValid(secondary_ip):
355 raise errors.OpPrereqError("Secondary IP address (%s) has to be a valid"
356 " IPv4 address." % secondary_ip,
359 if not netutils.IP4Address.Own(secondary_ip):
360 raise errors.OpPrereqError("You gave %s as secondary IP,"
361 " but it does not belong to this host." %
362 secondary_ip, errors.ECODE_ENVIRON)
364 if master_netmask is not None:
365 if not ipcls.ValidateNetmask(master_netmask):
366 raise errors.OpPrereqError("CIDR netmask (%s) not valid for IPv%s " %
367 (master_netmask, primary_ip_version),
370 master_netmask = ipcls.iplen
372 if vg_name is not None:
373 # Check if volume group is valid
374 vgstatus = utils.CheckVolumeGroupSize(utils.ListVolumeGroups(), vg_name,
375 constants.MIN_VG_SIZE)
377 raise errors.OpPrereqError("Error: %s\nspecify --no-lvm-storage if"
378 " you are not using lvm" % vgstatus,
381 if drbd_helper is not None:
383 curr_helper = bdev.BaseDRBD.GetUsermodeHelper()
384 except errors.BlockDeviceError, err:
385 raise errors.OpPrereqError("Error while checking drbd helper"
386 " (specify --no-drbd-storage if you are not"
387 " using drbd): %s" % str(err),
388 errors.ECODE_ENVIRON)
389 if drbd_helper != curr_helper:
390 raise errors.OpPrereqError("Error: requiring %s as drbd helper but %s"
391 " is the current helper" % (drbd_helper,
395 if constants.ENABLE_FILE_STORAGE:
396 file_storage_dir = _InitFileStorage(file_storage_dir)
398 file_storage_dir = ""
400 if constants.ENABLE_SHARED_FILE_STORAGE:
401 shared_file_storage_dir = _InitFileStorage(shared_file_storage_dir)
403 shared_file_storage_dir = ""
405 if not re.match("^[0-9a-z]{2}:[0-9a-z]{2}:[0-9a-z]{2}$", mac_prefix):
406 raise errors.OpPrereqError("Invalid mac prefix given '%s'" % mac_prefix,
409 result = utils.RunCmd(["ip", "link", "show", "dev", master_netdev])
411 raise errors.OpPrereqError("Invalid master netdev given (%s): '%s'" %
413 result.output.strip()), errors.ECODE_INVAL)
415 dirs = [(constants.RUN_GANETI_DIR, constants.RUN_DIRS_MODE)]
416 utils.EnsureDirs(dirs)
418 objects.UpgradeBeParams(beparams)
419 utils.ForceDictType(beparams, constants.BES_PARAMETER_TYPES)
420 utils.ForceDictType(nicparams, constants.NICS_PARAMETER_TYPES)
422 objects.NIC.CheckParameterSyntax(nicparams)
424 full_ipolicy = objects.FillIPolicy(constants.IPOLICY_DEFAULTS, ipolicy)
426 if ndparams is not None:
427 utils.ForceDictType(ndparams, constants.NDS_PARAMETER_TYPES)
429 ndparams = dict(constants.NDC_DEFAULTS)
431 # This is ugly, as we modify the dict itself
432 # FIXME: Make utils.ForceDictType pure functional or write a wrapper
435 for hvname, hvs_data in hv_state.items():
436 utils.ForceDictType(hvs_data, constants.HVSTS_PARAMETER_TYPES)
437 hv_state[hvname] = objects.Cluster.SimpleFillHvState(hvs_data)
439 hv_state = dict((hvname, constants.HVST_DEFAULTS)
440 for hvname in enabled_hypervisors)
442 # FIXME: disk_state has no default values yet
444 for storage, ds_data in disk_state.items():
445 if storage not in constants.DS_VALID_TYPES:
446 raise errors.OpPrereqError("Invalid storage type in disk state: %s" %
447 storage, errors.ECODE_INVAL)
448 for ds_name, state in ds_data.items():
449 utils.ForceDictType(state, constants.DSS_PARAMETER_TYPES)
450 ds_data[ds_name] = objects.Cluster.SimpleFillDiskState(state)
452 # hvparams is a mapping of hypervisor->hvparams dict
453 for hv_name, hv_params in hvparams.iteritems():
454 utils.ForceDictType(hv_params, constants.HVS_PARAMETER_TYPES)
455 hv_class = hypervisor.GetHypervisor(hv_name)
456 hv_class.CheckParameterSyntax(hv_params)
458 # diskparams is a mapping of disk-template->diskparams dict
459 for template, dt_params in diskparams.items():
460 param_keys = set(dt_params.keys())
461 default_param_keys = set(constants.DISK_DT_DEFAULTS[template].keys())
462 if not (param_keys <= default_param_keys):
463 unknown_params = param_keys - default_param_keys
464 raise errors.OpPrereqError("Invalid parameters for disk template %s:"
466 utils.CommaJoin(unknown_params)),
468 utils.ForceDictType(dt_params, constants.DISK_DT_TYPES)
470 utils.VerifyDictOptions(diskparams, constants.DISK_DT_DEFAULTS)
471 except errors.OpPrereqError, err:
472 raise errors.OpPrereqError("While verify diskparam options: %s" % err,
475 # set up ssh config and /etc/hosts
476 sshline = utils.ReadFile(constants.SSH_HOST_RSA_PUB)
477 sshkey = sshline.split(" ")[1]
480 utils.AddHostToEtcHosts(hostname.name, hostname.ip)
485 if default_iallocator is not None:
486 alloc_script = utils.FindFile(default_iallocator,
487 constants.IALLOCATOR_SEARCH_PATH,
489 if alloc_script is None:
490 raise errors.OpPrereqError("Invalid default iallocator script '%s'"
491 " specified" % default_iallocator,
493 elif constants.HTOOLS:
494 # htools was enabled at build-time, we default to it
495 if utils.FindFile(constants.IALLOC_HAIL,
496 constants.IALLOCATOR_SEARCH_PATH,
498 default_iallocator = constants.IALLOC_HAIL
502 # init of cluster config file
503 cluster_config = objects.Cluster(
505 rsahostkeypub=sshkey,
506 highest_used_port=(constants.FIRST_DRBD_PORT - 1),
507 mac_prefix=mac_prefix,
508 volume_group_name=vg_name,
509 tcpudp_port_pool=set(),
510 master_node=hostname.name,
511 master_ip=clustername.ip,
512 master_netmask=master_netmask,
513 master_netdev=master_netdev,
514 cluster_name=clustername.name,
515 file_storage_dir=file_storage_dir,
516 shared_file_storage_dir=shared_file_storage_dir,
517 enabled_hypervisors=enabled_hypervisors,
518 beparams={constants.PP_DEFAULT: beparams},
519 nicparams={constants.PP_DEFAULT: nicparams},
522 diskparams=diskparams,
523 candidate_pool_size=candidate_pool_size,
524 modify_etc_hosts=modify_etc_hosts,
525 modify_ssh_setup=modify_ssh_setup,
529 maintain_node_health=maintain_node_health,
530 drbd_usermode_helper=drbd_helper,
531 default_iallocator=default_iallocator,
532 primary_ip_family=ipcls.family,
533 prealloc_wipe_disks=prealloc_wipe_disks,
534 use_external_mip_script=use_external_mip_script,
535 ipolicy=full_ipolicy,
536 hv_state_static=hv_state,
537 disk_state_static=disk_state,
539 master_node_config = objects.Node(name=hostname.name,
540 primary_ip=hostname.ip,
541 secondary_ip=secondary_ip,
543 master_candidate=True,
544 offline=False, drained=False,
545 ctime=now, mtime=now,
547 InitConfig(constants.CONFIG_VERSION, cluster_config, master_node_config)
548 cfg = config.ConfigWriter(offline=True)
549 ssh.WriteKnownHostsFile(cfg, constants.SSH_KNOWN_HOSTS_FILE)
550 cfg.Update(cfg.GetClusterInfo(), logging.error)
551 backend.WriteSsconfFiles(cfg.GetSsconfValues())
553 # set up the inter-node password and certificate
554 _InitGanetiServerSetup(hostname.name)
556 logging.debug("Starting daemons")
557 result = utils.RunCmd([constants.DAEMON_UTIL, "start-all"])
559 raise errors.OpExecError("Could not start daemons, command %s"
560 " had exitcode %s and error %s" %
561 (result.cmd, result.exit_code, result.output))
563 _WaitForMasterDaemon()
566 def InitConfig(version, cluster_config, master_node_config,
567 cfg_file=constants.CLUSTER_CONF_FILE):
568 """Create the initial cluster configuration.
570 It will contain the current node, which will also be the master
571 node, and no instances.
574 @param version: configuration version
575 @type cluster_config: L{objects.Cluster}
576 @param cluster_config: cluster configuration
577 @type master_node_config: L{objects.Node}
578 @param master_node_config: master node configuration
579 @type cfg_file: string
580 @param cfg_file: configuration file path
583 uuid_generator = config.TemporaryReservationManager()
584 cluster_config.uuid = uuid_generator.Generate([], utils.NewUUID,
586 master_node_config.uuid = uuid_generator.Generate([], utils.NewUUID,
589 master_node_config.name: master_node_config,
591 default_nodegroup = objects.NodeGroup(
592 uuid=uuid_generator.Generate([], utils.NewUUID, _INITCONF_ECID),
593 name=constants.INITIAL_NODE_GROUP_NAME,
594 members=[master_node_config.name],
598 default_nodegroup.uuid: default_nodegroup,
601 config_data = objects.ConfigData(version=version,
602 cluster=cluster_config,
603 nodegroups=nodegroups,
607 ctime=now, mtime=now)
608 utils.WriteFile(cfg_file,
609 data=serializer.Dump(config_data.ToDict()),
613 def FinalizeClusterDestroy(master):
614 """Execute the last steps of cluster destroy
616 This function shuts down all the daemons, completing the destroy
617 begun in cmdlib.LUDestroyOpcode.
620 cfg = config.ConfigWriter()
621 modify_ssh_setup = cfg.GetClusterInfo().modify_ssh_setup
622 runner = rpc.BootstrapRunner()
624 master_params = cfg.GetMasterNetworkParameters()
625 master_params.name = master
626 ems = cfg.GetUseExternalMipScript()
627 result = runner.call_node_deactivate_master_ip(master_params.name,
630 msg = result.fail_msg
632 logging.warning("Could not disable the master IP: %s", msg)
634 result = runner.call_node_stop_master(master)
635 msg = result.fail_msg
637 logging.warning("Could not disable the master role: %s", msg)
639 result = runner.call_node_leave_cluster(master, modify_ssh_setup)
640 msg = result.fail_msg
642 logging.warning("Could not shutdown the node daemon and cleanup"
643 " the node: %s", msg)
646 def SetupNodeDaemon(cluster_name, node, ssh_key_check):
647 """Add a node to the cluster.
649 This function must be called before the actual opcode, and will ssh
650 to the remote node, copy the needed files, and start ganeti-noded,
651 allowing the master to do the rest via normal rpc calls.
653 @param cluster_name: the cluster name
654 @param node: the name of the new node
655 @param ssh_key_check: whether to do a strict key check
658 family = ssconf.SimpleStore().GetPrimaryIPFamily()
659 sshrunner = ssh.SshRunner(cluster_name,
660 ipv6=(family == netutils.IP6Address.family))
662 bind_address = constants.IP4_ADDRESS_ANY
663 if family == netutils.IP6Address.family:
664 bind_address = constants.IP6_ADDRESS_ANY
666 # set up inter-node password and certificate and restarts the node daemon
667 # and then connect with ssh to set password and start ganeti-noded
668 # note that all the below variables are sanitized at this point,
669 # either by being constants or by the checks above
670 sshrunner.CopyFileToNode(node, constants.NODED_CERT_FILE)
671 sshrunner.CopyFileToNode(node, constants.RAPI_CERT_FILE)
672 sshrunner.CopyFileToNode(node, constants.SPICE_CERT_FILE)
673 sshrunner.CopyFileToNode(node, constants.SPICE_CACERT_FILE)
674 sshrunner.CopyFileToNode(node, constants.CONFD_HMAC_KEY)
675 mycommand = ("%s stop-all; %s start %s -b %s" %
676 (constants.DAEMON_UTIL, constants.DAEMON_UTIL, constants.NODED,
677 utils.ShellQuote(bind_address)))
679 result = sshrunner.Run(node, "root", mycommand, batch=False,
680 ask_key=ssh_key_check,
681 use_cluster_key=True,
682 strict_host_check=ssh_key_check)
684 raise errors.OpExecError("Remote command on node %s, error: %s,"
686 (node, result.fail_reason, result.output))
688 _WaitForNodeDaemon(node)
691 def MasterFailover(no_voting=False):
692 """Failover the master node.
694 This checks that we are not already the master, and will cause the
695 current master to cease being master, and the non-master to become
698 @type no_voting: boolean
699 @param no_voting: force the operation without remote nodes agreement
703 sstore = ssconf.SimpleStore()
705 old_master, new_master = ssconf.GetMasterAndMyself(sstore)
706 node_list = sstore.GetNodeList()
707 mc_list = sstore.GetMasterCandidates()
709 if old_master == new_master:
710 raise errors.OpPrereqError("This commands must be run on the node"
711 " where you want the new master to be."
712 " %s is already the master" %
713 old_master, errors.ECODE_INVAL)
715 if new_master not in mc_list:
716 mc_no_master = [name for name in mc_list if name != old_master]
717 raise errors.OpPrereqError("This node is not among the nodes marked"
718 " as master candidates. Only these nodes"
719 " can become masters. Current list of"
720 " master candidates is:\n"
721 "%s" % ("\n".join(mc_no_master)),
725 vote_list = GatherMasterVotes(node_list)
728 voted_master = vote_list[0][0]
729 if voted_master is None:
730 raise errors.OpPrereqError("Cluster is inconsistent, most nodes did"
731 " not respond.", errors.ECODE_ENVIRON)
732 elif voted_master != old_master:
733 raise errors.OpPrereqError("I have a wrong configuration, I believe"
734 " the master is %s but the other nodes"
735 " voted %s. Please resync the configuration"
737 (old_master, voted_master),
743 logging.info("Setting master to %s, old master: %s", new_master, old_master)
746 # instantiate a real config writer, as we now know we have the
748 cfg = config.ConfigWriter(accept_foreign=True)
750 cluster_info = cfg.GetClusterInfo()
751 cluster_info.master_node = new_master
752 # this will also regenerate the ssconf files, since we updated the
754 cfg.Update(cluster_info, logging.error)
755 except errors.ConfigurationError, err:
756 logging.error("Error while trying to set the new master: %s",
760 # if cfg.Update worked, then it means the old master daemon won't be
761 # able now to write its own config file (we rely on locking in both
762 # backend.UploadFile() and ConfigWriter._Write(); hence the next
763 # step is to kill the old master
765 logging.info("Stopping the master daemon on node %s", old_master)
767 runner = rpc.BootstrapRunner()
768 master_params = cfg.GetMasterNetworkParameters()
769 master_params.name = old_master
770 ems = cfg.GetUseExternalMipScript()
771 result = runner.call_node_deactivate_master_ip(master_params.name,
774 msg = result.fail_msg
776 logging.warning("Could not disable the master IP: %s", msg)
778 result = runner.call_node_stop_master(old_master)
779 msg = result.fail_msg
781 logging.error("Could not disable the master role on the old master"
782 " %s, please disable manually: %s", old_master, msg)
784 logging.info("Checking master IP non-reachability...")
786 master_ip = sstore.GetMasterIP()
789 # Here we have a phase where no master should be running
791 if netutils.TcpPing(master_ip, constants.DEFAULT_NODED_PORT):
792 raise utils.RetryAgain()
795 utils.Retry(_check_ip, (1, 1.5, 5), total_timeout)
796 except utils.RetryTimeout:
797 logging.warning("The master IP is still reachable after %s seconds,"
798 " continuing but activating the master on the current"
799 " node will probably fail", total_timeout)
801 if jstore.CheckDrainFlag():
802 logging.info("Undraining job queue")
803 jstore.SetDrainFlag(False)
805 logging.info("Starting the master daemons on the new master")
807 result = rpc.BootstrapRunner().call_node_start_master_daemons(new_master,
809 msg = result.fail_msg
811 logging.error("Could not start the master role on the new master"
812 " %s, please check: %s", new_master, msg)
815 logging.info("Master failed over from %s to %s", old_master, new_master)
820 """Returns the current master node.
822 This is a separate function in bootstrap since it's needed by
823 gnt-cluster, and instead of importing directly ssconf, it's better
824 to abstract it in bootstrap, where we do use ssconf in other
828 sstore = ssconf.SimpleStore()
830 old_master, _ = ssconf.GetMasterAndMyself(sstore)
835 def GatherMasterVotes(node_list):
836 """Check the agreement on who is the master.
838 This function will return a list of (node, number of votes), ordered
839 by the number of votes. Errors will be denoted by the key 'None'.
841 Note that the sum of votes is the number of nodes this machine
842 knows, whereas the number of entries in the list could be different
843 (if some nodes vote for another master).
845 We remove ourselves from the list since we know that (bugs aside)
846 since we use the same source for configuration information for both
847 backend and boostrap, we'll always vote for ourselves.
849 @type node_list: list
850 @param node_list: the list of nodes to query for master info; the current
851 node will be removed if it is in the list
853 @return: list of (node, votes)
856 myself = netutils.Hostname.GetSysName()
858 node_list.remove(myself)
862 # no nodes left (eventually after removing myself)
864 results = rpc.BootstrapRunner().call_master_info(node_list)
865 if not isinstance(results, dict):
866 # this should not happen (unless internal error in rpc)
867 logging.critical("Can't complete rpc call, aborting master startup")
868 return [(None, len(node_list))]
876 logging.warning("Error contacting node %s: %s", node, msg)
878 # for now we accept both length 3, 4 and 5 (data[3] is primary ip version
879 # and data[4] is the master netmask)
880 elif not isinstance(data, (tuple, list)) or len(data) < 3:
881 logging.warning("Invalid data received from node %s: %s", node, data)
884 if None not in votes:
888 master_node = data[2]
889 if master_node not in votes:
890 votes[master_node] = 0
891 votes[master_node] += 1
893 vote_list = [v for v in votes.items()]
894 # sort first on number of votes then on name, since we want None
895 # sorted later if we have the half of the nodes not responding, and
896 # half voting all for the same master
897 vote_list.sort(key=lambda x: (x[1], x[0]), reverse=True)