bootstrap.py 24.7 KB
Newer Older
1
2
3
#
#

4
# Copyright (C) 2006, 2007, 2008, 2010 Google Inc.
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.


"""Functions to bootstrap a new cluster.

"""

import os
import os.path
import re
29
import logging
30
import time
31
32
33
34
35
36
37

from ganeti import rpc
from ganeti import ssh
from ganeti import utils
from ganeti import errors
from ganeti import config
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

45

46
def _InitSSHSetup():
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
  """Setup the SSH configuration for the cluster.

  This generates a dsa keypair for root, adds the pub key to the
  permitted hosts and adds the hostkey to its own known hosts.

  """
  priv_key, pub_key, auth_keys = ssh.GetUserFiles(constants.GANETI_RUNAS)

  for name in priv_key, pub_key:
    if os.path.exists(name):
      utils.CreateBackup(name)
    utils.RemoveFile(name)

  result = utils.RunCmd(["ssh-keygen", "-t", "dsa",
                         "-f", priv_key,
                         "-q", "-N", ""])
  if result.failed:
    raise errors.OpExecError("Could not generate ssh keypair, error %s" %
                             result.output)

67
  utils.AddAuthorizedKey(auth_keys, utils.ReadFile(pub_key))
68
69


70
71
72
73
74
75
76
def GenerateHmacKey(file_name):
  """Writes a new HMAC key.

  @type file_name: str
  @param file_name: Path to output file

  """
77
78
79
80
  utils.WriteFile(file_name, data="%s\n" % utils.GenerateSecret(), mode=0400,
                  backup=True)


81
def GenerateClusterCrypto(new_cluster_cert, new_rapi_cert, new_confd_hmac_key,
Iustin Pop's avatar
Iustin Pop committed
82
                          new_cds, rapi_cert_pem=None, cds=None,
83
84
                          nodecert_file=constants.NODED_CERT_FILE,
                          rapicert_file=constants.RAPI_CERT_FILE,
85
86
                          hmackey_file=constants.CONFD_HMAC_KEY,
                          cds_file=constants.CLUSTER_DOMAIN_SECRET_FILE):
87
88
89
90
91
92
  """Updates the cluster certificates, keys and secrets.

  @type new_cluster_cert: bool
  @param new_cluster_cert: Whether to generate a new cluster certificate
  @type new_rapi_cert: bool
  @param new_rapi_cert: Whether to generate a new RAPI certificate
93
94
  @type new_confd_hmac_key: bool
  @param new_confd_hmac_key: Whether to generate a new HMAC key
Michael Hanselmann's avatar
Michael Hanselmann committed
95
96
  @type new_cds: bool
  @param new_cds: Whether to generate a new cluster domain secret
97
98
  @type rapi_cert_pem: string
  @param rapi_cert_pem: New RAPI certificate in PEM format
Michael Hanselmann's avatar
Michael Hanselmann committed
99
100
  @type cds: string
  @param cds: New cluster domain secret
101
102
103
104
105
106
  @type nodecert_file: string
  @param nodecert_file: optional override of the node cert file path
  @type rapicert_file: string
  @param rapicert_file: optional override of the rapi cert file path
  @type hmackey_file: string
  @param hmackey_file: optional override of the hmac key file path
107
108

  """
109
  # noded SSL certificate
110
  cluster_cert_exists = os.path.exists(nodecert_file)
111
112
  if new_cluster_cert or not cluster_cert_exists:
    if cluster_cert_exists:
113
      utils.CreateBackup(nodecert_file)
114

115
    logging.debug("Generating new cluster certificate at %s", nodecert_file)
Iustin Pop's avatar
Iustin Pop committed
116
    utils.GenerateSelfSignedSslCert(nodecert_file)
117

118
  # confd HMAC key
119
120
121
  if new_confd_hmac_key or not os.path.exists(hmackey_file):
    logging.debug("Writing new confd HMAC key to %s", hmackey_file)
    GenerateHmacKey(hmackey_file)
122
123

  # RAPI
124
  rapi_cert_exists = os.path.exists(rapicert_file)
125
126
127

  if rapi_cert_pem:
    # Assume rapi_pem contains a valid PEM-formatted certificate and key
128
129
    logging.debug("Writing RAPI certificate at %s", rapicert_file)
    utils.WriteFile(rapicert_file, data=rapi_cert_pem, backup=True)
130
131
132

  elif new_rapi_cert or not rapi_cert_exists:
    if rapi_cert_exists:
133
      utils.CreateBackup(rapicert_file)
134

135
    logging.debug("Generating new RAPI certificate at %s", rapicert_file)
Iustin Pop's avatar
Iustin Pop committed
136
    utils.GenerateSelfSignedSslCert(rapicert_file)
137

Michael Hanselmann's avatar
Michael Hanselmann committed
138
139
  # Cluster domain secret
  if cds:
140
141
142
143
144
145
    logging.debug("Writing cluster domain secret to %s", cds_file)
    utils.WriteFile(cds_file, data=cds, backup=True)

  elif new_cds or not os.path.exists(cds_file):
    logging.debug("Generating new cluster domain secret at %s", cds_file)
    GenerateHmacKey(cds_file)
Michael Hanselmann's avatar
Michael Hanselmann committed
146

147

148
def _InitGanetiServerSetup(master_name):
149
150
151
  """Setup the necessary configuration for the initial node daemon.

  This creates the nodepass file containing the shared password for
152
153
154
155
  the cluster, generates the SSL certificate and starts the node daemon.

  @type master_name: str
  @param master_name: Name of the master node
156
157

  """
158
  # Generate cluster secrets
Michael Hanselmann's avatar
Michael Hanselmann committed
159
  GenerateClusterCrypto(True, False, False, False)
160

161
  result = utils.RunCmd([constants.DAEMON_UTIL, "start", constants.NODED])
162
163
164
165
166
  if result.failed:
    raise errors.OpExecError("Could not start the node daemon, command %s"
                             " had exitcode %s and error %s" %
                             (result.cmd, result.exit_code, result.output))

167
168
169
170
171
172
173
  _WaitForNodeDaemon(master_name)


def _WaitForNodeDaemon(node_name):
  """Wait for node daemon to become responsive.

  """
174
  def _CheckNodeDaemon():
175
    result = rpc.RpcRunner.call_version([node_name])[node_name]
176
177
    if result.fail_msg:
      raise utils.RetryAgain()
178

179
180
181
  try:
    utils.Retry(_CheckNodeDaemon, 1.0, 10.0)
  except utils.RetryTimeout:
182
183
184
    raise errors.OpExecError("Node daemon on %s didn't answer queries within"
                             " 10 seconds" % node_name)

185

186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
def _InitFileStorage(file_storage_dir):
  """Initialize if needed the file storage.

  @param file_storage_dir: the user-supplied value
  @return: either empty string (if file storage was disabled at build
      time) or the normalized path to the storage directory

  """
  if not constants.ENABLE_FILE_STORAGE:
    return ""

  file_storage_dir = os.path.normpath(file_storage_dir)

  if not os.path.isabs(file_storage_dir):
    raise errors.OpPrereqError("The file storage directory you passed is"
                               " not an absolute path.", errors.ECODE_INVAL)

  if not os.path.exists(file_storage_dir):
    try:
      os.makedirs(file_storage_dir, 0750)
    except OSError, err:
      raise errors.OpPrereqError("Cannot create file storage directory"
                                 " '%s': %s" % (file_storage_dir, err),
                                 errors.ECODE_ENVIRON)

  if not os.path.isdir(file_storage_dir):
    raise errors.OpPrereqError("The file storage directory '%s' is not"
                               " a directory." % file_storage_dir,
                               errors.ECODE_ENVIRON)
  return file_storage_dir


218
#pylint: disable-msg=R0913
219
def InitCluster(cluster_name, mac_prefix,
220
                master_netdev, file_storage_dir, candidate_pool_size,
221
222
                secondary_ip=None, vg_name=None, beparams=None,
                nicparams=None, hvparams=None, enabled_hypervisors=None,
223
                modify_etc_hosts=True, modify_ssh_setup=True,
224
                maintain_node_health=False, drbd_helper=None,
225
                uid_pool=None, default_iallocator=None):
226
227
  """Initialise the cluster.

228
229
230
  @type candidate_pool_size: int
  @param candidate_pool_size: master candidate pool size

231
  """
232
  # TODO: complete the docstring
233
  if config.ConfigWriter.IsCluster():
234
235
    raise errors.OpPrereqError("Cluster is already initialised",
                               errors.ECODE_STATE)
236

237
238
  if not enabled_hypervisors:
    raise errors.OpPrereqError("Enabled hypervisors list must contain at"
239
                               " least one member", errors.ECODE_INVAL)
240
241
242
  invalid_hvs = set(enabled_hypervisors) - constants.HYPER_TYPES
  if invalid_hvs:
    raise errors.OpPrereqError("Enabled hypervisors contains invalid"
243
244
                               " entries: %s" % invalid_hvs,
                               errors.ECODE_INVAL)
245

246
  hostname = netutils.GetHostInfo()
247

248
249
250
  if netutils.IP4Address.IsLoopback(hostname.ip):
    raise errors.OpPrereqError("This host's IP (%s) resolves to a loopback"
                               " address. Please fix DNS or %s." %
251
252
                               (hostname.ip, constants.ETC_HOSTS),
                               errors.ECODE_ENVIRON)
253

254
  if not netutils.IPAddress.Own(hostname.ip):
255
256
    raise errors.OpPrereqError("Inconsistency: this host's name resolves"
                               " to %s,\nbut this ip address does not"
257
258
                               " belong to this host. Aborting." %
                               hostname.ip, errors.ECODE_ENVIRON)
259

260
261
  clustername = \
    netutils.GetHostInfo(netutils.HostInfo.NormalizeName(cluster_name))
262

263
  if netutils.TcpPing(clustername.ip, constants.DEFAULT_NODED_PORT,
264
                   timeout=5):
265
266
    raise errors.OpPrereqError("Cluster IP already active. Aborting.",
                               errors.ECODE_NOTUNIQUE)
267
268

  if secondary_ip:
269
    if not netutils.IP4Address.IsValid(secondary_ip):
270
271
      raise errors.OpPrereqError("Invalid secondary ip given",
                                 errors.ECODE_INVAL)
272
    if (secondary_ip != hostname.ip and
273
        not netutils.IPAddress.Own(secondary_ip)):
274
275
      raise errors.OpPrereqError("You gave %s as secondary IP,"
                                 " but it does not belong to this host." %
276
                                 secondary_ip, errors.ECODE_ENVIRON)
277
278
  else:
    secondary_ip = hostname.ip
279
280
281
282
283
284
285

  if vg_name is not None:
    # Check if volume group is valid
    vgstatus = utils.CheckVolumeGroupSize(utils.ListVolumeGroups(), vg_name,
                                          constants.MIN_VG_SIZE)
    if vgstatus:
      raise errors.OpPrereqError("Error: %s\nspecify --no-lvm-storage if"
286
287
                                 " you are not using lvm" % vgstatus,
                                 errors.ECODE_INVAL)
288

289
290
291
292
293
294
295
296
297
298
299
300
301
302
  if drbd_helper is not None:
    try:
      curr_helper = bdev.BaseDRBD.GetUsermodeHelper()
    except errors.BlockDeviceError, err:
      raise errors.OpPrereqError("Error while checking drbd helper"
                                 " (specify --no-drbd-storage if you are not"
                                 " using drbd): %s" % str(err),
                                 errors.ECODE_ENVIRON)
    if drbd_helper != curr_helper:
      raise errors.OpPrereqError("Error: requiring %s as drbd helper but %s"
                                 " is the current helper" % (drbd_helper,
                                                             curr_helper),
                                 errors.ECODE_INVAL)

303
  file_storage_dir = _InitFileStorage(file_storage_dir)
304
305

  if not re.match("^[0-9a-z]{2}:[0-9a-z]{2}:[0-9a-z]{2}$", mac_prefix):
306
307
    raise errors.OpPrereqError("Invalid mac prefix given '%s'" % mac_prefix,
                               errors.ECODE_INVAL)
308
309
310
311
312

  result = utils.RunCmd(["ip", "link", "show", "dev", master_netdev])
  if result.failed:
    raise errors.OpPrereqError("Invalid master netdev given (%s): '%s'" %
                               (master_netdev,
313
                                result.output.strip()), errors.ECODE_INVAL)
314

315
316
317
  dirs = [(constants.RUN_GANETI_DIR, constants.RUN_DIRS_MODE)]
  utils.EnsureDirs(dirs)

318
  utils.ForceDictType(beparams, constants.BES_PARAMETER_TYPES)
319
320
321
  utils.ForceDictType(nicparams, constants.NICS_PARAMETER_TYPES)
  objects.NIC.CheckParameterSyntax(nicparams)

322
323
324
325
326
  # hvparams is a mapping of hypervisor->hvparams dict
  for hv_name, hv_params in hvparams.iteritems():
    utils.ForceDictType(hv_params, constants.HVS_PARAMETER_TYPES)
    hv_class = hypervisor.GetHypervisor(hv_name)
    hv_class.CheckParameterSyntax(hv_params)
327

328
  # set up the inter-node password and certificate, start noded
329
  _InitGanetiServerSetup(hostname.name)
330
331

  # set up ssh config and /etc/hosts
332
  sshline = utils.ReadFile(constants.SSH_HOST_RSA_PUB)
333
334
  sshkey = sshline.split(" ")[1]

335
336
337
  if modify_etc_hosts:
    utils.AddHostToEtcHosts(hostname.name)

338
339
  if modify_ssh_setup:
    _InitSSHSetup()
340

341
342
343
344
345
346
347
348
349
  if default_iallocator is not None:
    alloc_script = utils.FindFile(default_iallocator,
                                  constants.IALLOCATOR_SEARCH_PATH,
                                  os.path.isfile)
    if alloc_script is None:
      raise errors.OpPrereqError("Invalid default iallocator script '%s'"
                                 " specified" % default_iallocator,
                                 errors.ECODE_INVAL)

350
351
  now = time.time()

352
  # init of cluster config file
353
354
355
356
357
358
359
  cluster_config = objects.Cluster(
    serial_no=1,
    rsahostkeypub=sshkey,
    highest_used_port=(constants.FIRST_DRBD_PORT - 1),
    mac_prefix=mac_prefix,
    volume_group_name=vg_name,
    tcpudp_port_pool=set(),
360
361
362
363
364
    master_node=hostname.name,
    master_ip=clustername.ip,
    master_netdev=master_netdev,
    cluster_name=clustername.name,
    file_storage_dir=file_storage_dir,
365
    enabled_hypervisors=enabled_hypervisors,
366
    beparams={constants.PP_DEFAULT: beparams},
367
    nicparams={constants.PP_DEFAULT: nicparams},
368
    hvparams=hvparams,
369
    candidate_pool_size=candidate_pool_size,
Guido Trotter's avatar
Guido Trotter committed
370
    modify_etc_hosts=modify_etc_hosts,
371
    modify_ssh_setup=modify_ssh_setup,
372
    uid_pool=uid_pool,
373
374
375
    ctime=now,
    mtime=now,
    uuid=utils.NewUUID(),
376
    maintain_node_health=maintain_node_health,
377
    drbd_usermode_helper=drbd_helper,
378
    default_iallocator=default_iallocator,
379
380
381
    )
  master_node_config = objects.Node(name=hostname.name,
                                    primary_ip=hostname.ip,
382
                                    secondary_ip=secondary_ip,
383
384
                                    serial_no=1,
                                    master_candidate=True,
385
                                    offline=False, drained=False,
386
                                    )
387
  InitConfig(constants.CONFIG_VERSION, cluster_config, master_node_config)
388
  cfg = config.ConfigWriter()
389
  ssh.WriteKnownHostsFile(cfg, constants.SSH_KNOWN_HOSTS_FILE)
390
  cfg.Update(cfg.GetClusterInfo(), logging.error)
391

Iustin Pop's avatar
Iustin Pop committed
392
393
  # start the master ip
  # TODO: Review rpc call from bootstrap
394
  # TODO: Warn on failed start master
395
  rpc.RpcRunner.call_node_start_master(hostname.name, True, False)
Iustin Pop's avatar
Iustin Pop committed
396

397

Oleksiy Mishchenko's avatar
Oleksiy Mishchenko committed
398
399
def InitConfig(version, cluster_config, master_node_config,
               cfg_file=constants.CLUSTER_CONF_FILE):
Iustin Pop's avatar
Iustin Pop committed
400
401
402
403
404
405
  """Create the initial cluster configuration.

  It will contain the current node, which will also be the master
  node, and no instances.

  @type version: int
Iustin Pop's avatar
Iustin Pop committed
406
407
408
409
410
411
412
413
  @param version: configuration version
  @type cluster_config: L{objects.Cluster}
  @param cluster_config: cluster configuration
  @type master_node_config: L{objects.Node}
  @param master_node_config: master node configuration
  @type cfg_file: string
  @param cfg_file: configuration file path

Iustin Pop's avatar
Iustin Pop committed
414
415
416
417
418
  """
  nodes = {
    master_node_config.name: master_node_config,
    }

419
  now = time.time()
Iustin Pop's avatar
Iustin Pop committed
420
421
422
423
  config_data = objects.ConfigData(version=version,
                                   cluster=cluster_config,
                                   nodes=nodes,
                                   instances={},
424
425
                                   serial_no=1,
                                   ctime=now, mtime=now)
426
427
428
  utils.WriteFile(cfg_file,
                  data=serializer.Dump(config_data.ToDict()),
                  mode=0600)
Oleksiy Mishchenko's avatar
Oleksiy Mishchenko committed
429
430


Iustin Pop's avatar
Iustin Pop committed
431
432
433
434
435
436
437
def FinalizeClusterDestroy(master):
  """Execute the last steps of cluster destroy

  This function shuts down all the daemons, completing the destroy
  begun in cmdlib.LUDestroyOpcode.

  """
438
439
  cfg = config.ConfigWriter()
  modify_ssh_setup = cfg.GetClusterInfo().modify_ssh_setup
440
  result = rpc.RpcRunner.call_node_stop_master(master, True)
441
  msg = result.fail_msg
442
  if msg:
443
    logging.warning("Could not disable the master role: %s", msg)
444
  result = rpc.RpcRunner.call_node_leave_cluster(master, modify_ssh_setup)
445
  msg = result.fail_msg
446
447
448
  if msg:
    logging.warning("Could not shutdown the node daemon and cleanup"
                    " the node: %s", msg)
Iustin Pop's avatar
Iustin Pop committed
449
450


Iustin Pop's avatar
Iustin Pop committed
451
def SetupNodeDaemon(cluster_name, node, ssh_key_check):
452
453
  """Add a node to the cluster.

454
455
456
  This function must be called before the actual opcode, and will ssh
  to the remote node, copy the needed files, and start ganeti-noded,
  allowing the master to do the rest via normal rpc calls.
457

Iustin Pop's avatar
Iustin Pop committed
458
459
460
  @param cluster_name: the cluster name
  @param node: the name of the new node
  @param ssh_key_check: whether to do a strict key check
461
462

  """
Iustin Pop's avatar
Iustin Pop committed
463
  sshrunner = ssh.SshRunner(cluster_name)
464

465
  noded_cert = utils.ReadFile(constants.NODED_CERT_FILE)
466
  rapi_cert = utils.ReadFile(constants.RAPI_CERT_FILE)
467
  confd_hmac_key = utils.ReadFile(constants.CONFD_HMAC_KEY)
468

469
470
471
  # in the base64 pem encoding, neither '!' nor '.' are valid chars,
  # so we use this to detect an invalid certificate; as long as the
  # cert doesn't contain this, the here-document will be correctly
472
473
  # parsed by the shell sequence below. HMAC keys are hexadecimal strings,
  # so the same restrictions apply.
474
  for content in (noded_cert, rapi_cert, confd_hmac_key):
475
476
    if re.search('^!EOF\.', content, re.MULTILINE):
      raise errors.OpExecError("invalid SSL certificate or HMAC key")
477
478
479

  if not noded_cert.endswith("\n"):
    noded_cert += "\n"
480
481
  if not rapi_cert.endswith("\n"):
    rapi_cert += "\n"
482
483
  if not confd_hmac_key.endswith("\n"):
    confd_hmac_key += "\n"
484
485
486
487
488

  # set up inter-node password and certificate and restarts the node daemon
  # and then connect with ssh to set password and start ganeti-noded
  # note that all the below variables are sanitized at this point,
  # either by being constants or by the checks above
Michael Hanselmann's avatar
Michael Hanselmann committed
489
  # TODO: Could this command exceed a shell's maximum command length?
490
491
  mycommand = ("umask 077 && "
               "cat > '%s' << '!EOF.' && \n"
492
493
494
               "%s!EOF.\n"
               "cat > '%s' << '!EOF.' && \n"
               "%s!EOF.\n"
495
496
497
               "cat > '%s' << '!EOF.' && \n"
               "%s!EOF.\n"
               "chmod 0400 %s %s %s && "
498
               "%s start %s" %
499
               (constants.NODED_CERT_FILE, noded_cert,
500
                constants.RAPI_CERT_FILE, rapi_cert,
501
                constants.CONFD_HMAC_KEY, confd_hmac_key,
502
                constants.NODED_CERT_FILE, constants.RAPI_CERT_FILE,
503
                constants.CONFD_HMAC_KEY,
504
                constants.DAEMON_UTIL, constants.NODED))
505

506
507
508
509
  result = sshrunner.Run(node, 'root', mycommand, batch=False,
                         ask_key=ssh_key_check,
                         use_cluster_key=False,
                         strict_host_check=ssh_key_check)
510
511
512
513
514
  if result.failed:
    raise errors.OpExecError("Remote command on node %s, error: %s,"
                             " output: %s" %
                             (node, result.fail_reason, result.output))

515
516
  _WaitForNodeDaemon(node)

517

518
def MasterFailover(no_voting=False):
519
520
521
522
523
524
  """Failover the master node.

  This checks that we are not already the master, and will cause the
  current master to cease being master, and the non-master to become
  new master.

525
526
527
528
  @type no_voting: boolean
  @param no_voting: force the operation without remote nodes agreement
                      (dangerous)

529
  """
530
  sstore = ssconf.SimpleStore()
531

532
533
534
  old_master, new_master = ssconf.GetMasterAndMyself(sstore)
  node_list = sstore.GetNodeList()
  mc_list = sstore.GetMasterCandidates()
535
536
537
538
539

  if old_master == new_master:
    raise errors.OpPrereqError("This commands must be run on the node"
                               " where you want the new master to be."
                               " %s is already the master" %
540
                               old_master, errors.ECODE_INVAL)
541

542
543
544
545
546
547
  if new_master not in mc_list:
    mc_no_master = [name for name in mc_list if name != old_master]
    raise errors.OpPrereqError("This node is not among the nodes marked"
                               " as master candidates. Only these nodes"
                               " can become masters. Current list of"
                               " master candidates is:\n"
548
549
                               "%s" % ('\n'.join(mc_no_master)),
                               errors.ECODE_STATE)
550

551
552
553
554
555
556
557
  if not no_voting:
    vote_list = GatherMasterVotes(node_list)

    if vote_list:
      voted_master = vote_list[0][0]
      if voted_master is None:
        raise errors.OpPrereqError("Cluster is inconsistent, most nodes did"
558
                                   " not respond.", errors.ECODE_ENVIRON)
559
560
561
562
563
      elif voted_master != old_master:
        raise errors.OpPrereqError("I have a wrong configuration, I believe"
                                   " the master is %s but the other nodes"
                                   " voted %s. Please resync the configuration"
                                   " of this node." %
564
565
                                   (old_master, voted_master),
                                   errors.ECODE_STATE)
566
567
568
569
  # end checks

  rcode = 0

570
  logging.info("Setting master to %s, old master: %s", new_master, old_master)
571

572
  result = rpc.RpcRunner.call_node_stop_master(old_master, True)
573
  msg = result.fail_msg
574
  if msg:
575
    logging.error("Could not disable the master role on the old master"
576
                 " %s, please disable manually: %s", old_master, msg)
577

Iustin Pop's avatar
Iustin Pop committed
578
579
  master_ip = sstore.GetMasterIP()
  total_timeout = 30
Michael Hanselmann's avatar
Michael Hanselmann committed
580
  # Here we have a phase where no master should be running
Iustin Pop's avatar
Iustin Pop committed
581
  def _check_ip():
582
    if netutils.TcpPing(master_ip, constants.DEFAULT_NODED_PORT):
Iustin Pop's avatar
Iustin Pop committed
583
584
585
586
587
588
589
590
      raise utils.RetryAgain()

  try:
    utils.Retry(_check_ip, (1, 1.5, 5), total_timeout)
  except utils.RetryTimeout:
    logging.warning("The master IP is still reachable after %s seconds,"
                    " continuing but activating the master on the current"
                    " node will probably fail", total_timeout)
591

Iustin Pop's avatar
Iustin Pop committed
592
593
594
  # instantiate a real config writer, as we now know we have the
  # configuration data
  cfg = config.ConfigWriter()
595

Iustin Pop's avatar
Iustin Pop committed
596
597
598
599
  cluster_info = cfg.GetClusterInfo()
  cluster_info.master_node = new_master
  # this will also regenerate the ssconf files, since we updated the
  # cluster info
600
  cfg.Update(cluster_info, logging.error)
601

602
  result = rpc.RpcRunner.call_node_start_master(new_master, True, no_voting)
603
  msg = result.fail_msg
604
  if msg:
605
    logging.error("Could not start the master role on the new master"
606
                  " %s, please check: %s", new_master, msg)
607
608
609
    rcode = 1

  return rcode
610
611


612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
def GetMaster():
  """Returns the current master node.

  This is a separate function in bootstrap since it's needed by
  gnt-cluster, and instead of importing directly ssconf, it's better
  to abstract it in bootstrap, where we do use ssconf in other
  functions too.

  """
  sstore = ssconf.SimpleStore()

  old_master, _ = ssconf.GetMasterAndMyself(sstore)

  return old_master


628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
def GatherMasterVotes(node_list):
  """Check the agreement on who is the master.

  This function will return a list of (node, number of votes), ordered
  by the number of votes. Errors will be denoted by the key 'None'.

  Note that the sum of votes is the number of nodes this machine
  knows, whereas the number of entries in the list could be different
  (if some nodes vote for another master).

  We remove ourselves from the list since we know that (bugs aside)
  since we use the same source for configuration information for both
  backend and boostrap, we'll always vote for ourselves.

  @type node_list: list
  @param node_list: the list of nodes to query for master info; the current
Michael Hanselmann's avatar
Michael Hanselmann committed
644
      node will be removed if it is in the list
645
646
647
648
  @rtype: list
  @return: list of (node, votes)

  """
649
  myself = netutils.HostInfo().name
650
651
652
653
654
655
656
657
658
659
660
661
662
663
  try:
    node_list.remove(myself)
  except ValueError:
    pass
  if not node_list:
    # no nodes left (eventually after removing myself)
    return []
  results = rpc.RpcRunner.call_master_info(node_list)
  if not isinstance(results, dict):
    # this should not happen (unless internal error in rpc)
    logging.critical("Can't complete rpc call, aborting master startup")
    return [(None, len(node_list))]
  votes = {}
  for node in results:
664
    nres = results[node]
665
    data = nres.payload
666
    msg = nres.fail_msg
667
668
669
670
671
672
673
674
    fail = False
    if msg:
      logging.warning("Error contacting node %s: %s", node, msg)
      fail = True
    elif not isinstance(data, (tuple, list)) or len(data) < 3:
      logging.warning("Invalid data received from node %s: %s", node, data)
      fail = True
    if fail:
675
676
677
678
      if None not in votes:
        votes[None] = 0
      votes[None] += 1
      continue
679
    master_node = data[2]
680
681
682
683
684
685
686
687
688
689
690
    if master_node not in votes:
      votes[master_node] = 0
    votes[master_node] += 1

  vote_list = [v for v in votes.items()]
  # sort first on number of votes then on name, since we want None
  # sorted later if we have the half of the nodes not responding, and
  # half voting all for the same master
  vote_list.sort(key=lambda x: (x[1], x[0]), reverse=True)

  return vote_list