cmdlib.py 174 KB
Newer Older
Iustin Pop's avatar
Iustin Pop committed
1
#
Iustin Pop's avatar
Iustin Pop committed
2
3
#

4
# Copyright (C) 2006, 2007, 2008 Google Inc.
Iustin Pop's avatar
Iustin Pop committed
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
#
# 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.


22
"""Module implementing the master-side code."""
Iustin Pop's avatar
Iustin Pop committed
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

# pylint: disable-msg=W0613,W0201

import os
import os.path
import sha
import time
import tempfile
import re
import platform

from ganeti import rpc
from ganeti import ssh
from ganeti import logger
from ganeti import utils
from ganeti import errors
from ganeti import hypervisor
from ganeti import config
from ganeti import constants
from ganeti import objects
from ganeti import opcodes
from ganeti import ssconf
45
from ganeti import serializer
46
47


Iustin Pop's avatar
Iustin Pop committed
48
class LogicalUnit(object):
49
  """Logical Unit base class.
Iustin Pop's avatar
Iustin Pop committed
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73

  Subclasses must follow these rules:
    - implement CheckPrereq which also fills in the opcode instance
      with all the fields (even if as None)
    - implement Exec
    - implement BuildHooksEnv
    - redefine HPATH and HTYPE
    - optionally redefine their run requirements (REQ_CLUSTER,
      REQ_MASTER); note that all commands require root permissions

  """
  HPATH = None
  HTYPE = None
  _OP_REQP = []
  REQ_CLUSTER = True
  REQ_MASTER = True

  def __init__(self, processor, op, cfg, sstore):
    """Constructor for LogicalUnit.

    This needs to be overriden in derived classes in order to check op
    validity.

    """
Iustin Pop's avatar
Iustin Pop committed
74
    self.proc = processor
Iustin Pop's avatar
Iustin Pop committed
75
76
77
    self.op = op
    self.cfg = cfg
    self.sstore = sstore
78
79
    self.__ssh = None

Iustin Pop's avatar
Iustin Pop committed
80
81
82
    for attr_name in self._OP_REQP:
      attr_val = getattr(op, attr_name, None)
      if attr_val is None:
83
84
        raise errors.OpPrereqError("Required parameter '%s' missing" %
                                   attr_name)
Iustin Pop's avatar
Iustin Pop committed
85
86
    if self.REQ_CLUSTER:
      if not cfg.IsCluster():
87
88
        raise errors.OpPrereqError("Cluster not initialized yet,"
                                   " use 'gnt-cluster init' first.")
Iustin Pop's avatar
Iustin Pop committed
89
      if self.REQ_MASTER:
90
        master = sstore.GetMasterNode()
91
        if master != utils.HostInfo().name:
92
93
          raise errors.OpPrereqError("Commands must be run on the master"
                                     " node %s" % master)
Iustin Pop's avatar
Iustin Pop committed
94

95
96
97
98
99
  def __GetSSH(self):
    """Returns the SshRunner object

    """
    if not self.__ssh:
100
      self.__ssh = ssh.SshRunner(self.sstore)
101
102
103
104
    return self.__ssh

  ssh = property(fget=__GetSSH)

Iustin Pop's avatar
Iustin Pop committed
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
  def CheckPrereq(self):
    """Check prerequisites for this LU.

    This method should check that the prerequisites for the execution
    of this LU are fulfilled. It can do internode communication, but
    it should be idempotent - no cluster or system changes are
    allowed.

    The method should raise errors.OpPrereqError in case something is
    not fulfilled. Its return value is ignored.

    This method should also update all the parameters of the opcode to
    their canonical form; e.g. a short node name must be fully
    expanded after this method has successfully completed (so that
    hooks, logging, etc. work correctly).

    """
    raise NotImplementedError

  def Exec(self, feedback_fn):
    """Execute the LU.

    This method should implement the actual work. It should raise
    errors.OpExecError for failures that are somewhat dealt with in
    code, or expected.

    """
    raise NotImplementedError

  def BuildHooksEnv(self):
    """Build hooks environment for this LU.

    This method should return a three-node tuple consisting of: a dict
    containing the environment that will be used for running the
    specific hook for this LU, a list of node names on which the hook
    should run before the execution, and a list of node names on which
    the hook should run after the execution.

    The keys of the dict must not have 'GANETI_' prefixed as this will
    be handled in the hooks runner. Also note additional keys will be
    added by the hooks runner. If the LU doesn't define any
    environment, an empty dict (and not None) should be returned.

148
    No nodes should be returned as an empty list (and not None).
Iustin Pop's avatar
Iustin Pop committed
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167

    Note that if the HPATH for a LU class is None, this function will
    not be called.

    """
    raise NotImplementedError


class NoHooksLU(LogicalUnit):
  """Simple LU which runs no hooks.

  This LU is intended as a parent for other LogicalUnits which will
  run no hooks, in order to reduce duplicate code.

  """
  HPATH = None
  HTYPE = None


168
169
170
171
172
173
174
175
def _AddHostToEtcHosts(hostname):
  """Wrapper around utils.SetEtcHostsEntry.

  """
  hi = utils.HostInfo(name=hostname)
  utils.SetEtcHostsEntry(constants.ETC_HOSTS, hi.ip, hi.name, [hi.ShortName()])


176
def _RemoveHostFromEtcHosts(hostname):
177
  """Wrapper around utils.RemoveEtcHostsEntry.
178
179
180
181
182
183
184

  """
  hi = utils.HostInfo(name=hostname)
  utils.RemoveEtcHostsEntry(constants.ETC_HOSTS, hi.name)
  utils.RemoveEtcHostsEntry(constants.ETC_HOSTS, hi.ShortName())


185
def _GetWantedNodes(lu, nodes):
186
  """Returns list of checked and expanded node names.
187
188
189
190
191

  Args:
    nodes: List of nodes (strings) or None for all

  """
192
  if not isinstance(nodes, list):
193
    raise errors.OpPrereqError("Invalid argument type 'nodes'")
194
195

  if nodes:
196
    wanted = []
197
198

    for name in nodes:
199
      node = lu.cfg.ExpandNodeName(name)
200
      if node is None:
201
        raise errors.OpPrereqError("No such node name '%s'" % name)
202
      wanted.append(node)
203
204

  else:
205
206
    wanted = lu.cfg.GetNodeList()
  return utils.NiceSort(wanted)
207
208
209


def _GetWantedInstances(lu, instances):
210
  """Returns list of checked and expanded instance names.
211
212
213
214
215
216
217
218
219
220
221
222

  Args:
    instances: List of instances (strings) or None for all

  """
  if not isinstance(instances, list):
    raise errors.OpPrereqError("Invalid argument type 'instances'")

  if instances:
    wanted = []

    for name in instances:
223
      instance = lu.cfg.ExpandInstanceName(name)
224
225
226
227
228
      if instance is None:
        raise errors.OpPrereqError("No such instance name '%s'" % name)
      wanted.append(instance)

  else:
229
230
    wanted = lu.cfg.GetInstanceList()
  return utils.NiceSort(wanted)
231
232
233


def _CheckOutputFields(static, dynamic, selected):
234
235
236
237
238
239
240
241
242
  """Checks whether all selected fields are valid.

  Args:
    static: Static fields
    dynamic: Dynamic fields

  """
  static_fields = frozenset(static)
  dynamic_fields = frozenset(dynamic)
243

244
  all_fields = static_fields | dynamic_fields
245

246
  if not all_fields.issuperset(selected):
247
248
249
    raise errors.OpPrereqError("Unknown output fields selected: %s"
                               % ",".join(frozenset(selected).
                                          difference(all_fields)))
250
251


252
def _BuildInstanceHookEnv(name, primary_node, secondary_nodes, os_type, status,
253
                          memory, vcpus, nics):
254
255
256
257
  """Builds instance related env variables for hooks from single variables.

  Args:
    secondary_nodes: List of secondary nodes as strings
258
259
  """
  env = {
260
    "OP_TARGET": name,
261
262
263
    "INSTANCE_NAME": name,
    "INSTANCE_PRIMARY": primary_node,
    "INSTANCE_SECONDARIES": " ".join(secondary_nodes),
264
    "INSTANCE_OS_TYPE": os_type,
265
266
267
268
269
270
271
    "INSTANCE_STATUS": status,
    "INSTANCE_MEMORY": memory,
    "INSTANCE_VCPUS": vcpus,
  }

  if nics:
    nic_count = len(nics)
272
    for idx, (ip, bridge, mac) in enumerate(nics):
273
274
275
276
      if ip is None:
        ip = ""
      env["INSTANCE_NIC%d_IP" % idx] = ip
      env["INSTANCE_NIC%d_BRIDGE" % idx] = bridge
277
      env["INSTANCE_NIC%d_HWADDR" % idx] = mac
278
279
280
281
282
283
284
285
286
  else:
    nic_count = 0

  env["INSTANCE_NIC_COUNT"] = nic_count

  return env


def _BuildInstanceHookEnvByObject(instance, override=None):
287
288
289
290
291
292
  """Builds instance related env variables for hooks from an object.

  Args:
    instance: objects.Instance object of instance
    override: dict of values to override
  """
293
294
295
296
  args = {
    'name': instance.name,
    'primary_node': instance.primary_node,
    'secondary_nodes': instance.secondary_nodes,
297
    'os_type': instance.os,
298
299
300
    'status': instance.os,
    'memory': instance.memory,
    'vcpus': instance.vcpus,
301
    'nics': [(nic.ip, nic.bridge, nic.mac) for nic in instance.nics],
302
303
304
305
306
307
  }
  if override:
    args.update(override)
  return _BuildInstanceHookEnv(**args)


Iustin Pop's avatar
Iustin Pop committed
308
309
310
311
312
313
314
315
316
317
318
def _HasValidVG(vglist, vgname):
  """Checks if the volume group list is valid.

  A non-None return value means there's an error, and the return value
  is the error message.

  """
  vgsize = vglist.get(vgname, None)
  if vgsize is None:
    return "volume group '%s' missing" % vgname
  elif vgsize < 20480:
319
320
    return ("volume group '%s' too small (20480MiB required, %dMib found)" %
            (vgname, vgsize))
Iustin Pop's avatar
Iustin Pop committed
321
322
323
324
325
326
327
328
329
330
331
332
333
334
  return None


def _InitSSHSetup(node):
  """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.

  Args:
    node: the name of this host as a fqdn

  """
335
  priv_key, pub_key, auth_keys = ssh.GetUserFiles(constants.GANETI_RUNAS)
Iustin Pop's avatar
Iustin Pop committed
336

337
338
339
340
  for name in priv_key, pub_key:
    if os.path.exists(name):
      utils.CreateBackup(name)
    utils.RemoveFile(name)
Iustin Pop's avatar
Iustin Pop committed
341
342

  result = utils.RunCmd(["ssh-keygen", "-t", "dsa",
343
                         "-f", priv_key,
Iustin Pop's avatar
Iustin Pop committed
344
345
                         "-q", "-N", ""])
  if result.failed:
346
347
    raise errors.OpExecError("Could not generate ssh keypair, error %s" %
                             result.output)
Iustin Pop's avatar
Iustin Pop committed
348

349
  f = open(pub_key, 'r')
Iustin Pop's avatar
Iustin Pop committed
350
  try:
351
    utils.AddAuthorizedKey(auth_keys, f.read(8192))
Iustin Pop's avatar
Iustin Pop committed
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
  finally:
    f.close()


def _InitGanetiServerSetup(ss):
  """Setup the necessary configuration for the initial node daemon.

  This creates the nodepass file containing the shared password for
  the cluster and also generates the SSL certificate.

  """
  # Create pseudo random password
  randpass = sha.new(os.urandom(64)).hexdigest()
  # and write it into sstore
  ss.SetKey(ss.SS_NODED_PASS, randpass)

  result = utils.RunCmd(["openssl", "req", "-new", "-newkey", "rsa:1024",
                         "-days", str(365*5), "-nodes", "-x509",
                         "-keyout", constants.SSL_CERT_FILE,
                         "-out", constants.SSL_CERT_FILE, "-batch"])
  if result.failed:
373
374
375
    raise errors.OpExecError("could not generate server ssl cert, command"
                             " %s had exitcode %s and error message %s" %
                             (result.cmd, result.exit_code, result.output))
Iustin Pop's avatar
Iustin Pop committed
376
377
378
379
380
381

  os.chmod(constants.SSL_CERT_FILE, 0400)

  result = utils.RunCmd([constants.NODE_INITD_SCRIPT, "restart"])

  if result.failed:
382
383
384
    raise errors.OpExecError("Could not start the node daemon, command %s"
                             " had exitcode %s and error %s" %
                             (result.cmd, result.exit_code, result.output))
Iustin Pop's avatar
Iustin Pop committed
385
386


387
388
389
390
391
392
393
394
395
396
397
398
def _CheckInstanceBridgesExist(instance):
  """Check that the brigdes needed by an instance exist.

  """
  # check bridges existance
  brlist = [nic.bridge for nic in instance.nics]
  if not rpc.call_bridges_exist(instance.primary_node, brlist):
    raise errors.OpPrereqError("one or more target bridges %s does not"
                               " exist on destination node '%s'" %
                               (brlist, instance.primary_node))


Iustin Pop's avatar
Iustin Pop committed
399
400
401
402
403
404
class LUInitCluster(LogicalUnit):
  """Initialise the cluster.

  """
  HPATH = "cluster-init"
  HTYPE = constants.HTYPE_CLUSTER
405
  _OP_REQP = ["cluster_name", "hypervisor_type", "mac_prefix",
406
              "def_bridge", "master_netdev", "file_storage_dir"]
Iustin Pop's avatar
Iustin Pop committed
407
408
409
410
411
412
413
414
415
  REQ_CLUSTER = False

  def BuildHooksEnv(self):
    """Build hooks env.

    Notes: Since we don't require a cluster, we must manually add
    ourselves in the post-run node list.

    """
416
417
    env = {"OP_TARGET": self.op.cluster_name}
    return env, [], [self.hostname.name]
Iustin Pop's avatar
Iustin Pop committed
418
419
420
421
422
423

  def CheckPrereq(self):
    """Verify that the passed name is a valid one.

    """
    if config.ConfigWriter.IsCluster():
424
      raise errors.OpPrereqError("Cluster is already initialised")
Iustin Pop's avatar
Iustin Pop committed
425

426
427
428
429
430
431
    if self.op.hypervisor_type == constants.HT_XEN_HVM31:
      if not os.path.exists(constants.VNC_PASSWORD_FILE):
        raise errors.OpPrereqError("Please prepare the cluster VNC"
                                   "password file %s" %
                                   constants.VNC_PASSWORD_FILE)

432
    self.hostname = hostname = utils.HostInfo()
433

434
    if hostname.ip.startswith("127."):
435
      raise errors.OpPrereqError("This host's IP resolves to the private"
436
437
                                 " range (%s). Please fix DNS or %s." %
                                 (hostname.ip, constants.ETC_HOSTS))
438

439
440
    if not utils.TcpPing(hostname.ip, constants.DEFAULT_NODED_PORT,
                         source=constants.LOCALHOST_IP_ADDRESS):
441
442
443
      raise errors.OpPrereqError("Inconsistency: this host's name resolves"
                                 " to %s,\nbut this ip address does not"
                                 " belong to this host."
444
                                 " Aborting." % hostname.ip)
Iustin Pop's avatar
Iustin Pop committed
445

446
447
448
449
450
451
    self.clustername = clustername = utils.HostInfo(self.op.cluster_name)

    if utils.TcpPing(clustername.ip, constants.DEFAULT_NODED_PORT,
                     timeout=5):
      raise errors.OpPrereqError("Cluster IP already active. Aborting.")

Iustin Pop's avatar
Iustin Pop committed
452
453
    secondary_ip = getattr(self.op, "secondary_ip", None)
    if secondary_ip and not utils.IsValidIP(secondary_ip):
454
      raise errors.OpPrereqError("Invalid secondary ip given")
455
456
    if (secondary_ip and
        secondary_ip != hostname.ip and
457
458
        (not utils.TcpPing(secondary_ip, constants.DEFAULT_NODED_PORT,
                           source=constants.LOCALHOST_IP_ADDRESS))):
459
460
      raise errors.OpPrereqError("You gave %s as secondary IP,"
                                 " but it does not belong to this host." %
461
                                 secondary_ip)
Iustin Pop's avatar
Iustin Pop committed
462
463
    self.secondary_ip = secondary_ip

464
465
466
467
468
469
470
471
    if not hasattr(self.op, "vg_name"):
      self.op.vg_name = None
    # if vg_name not None, checks if volume group is valid
    if self.op.vg_name:
      vgstatus = _HasValidVG(utils.ListVolumeGroups(), self.op.vg_name)
      if vgstatus:
        raise errors.OpPrereqError("Error: %s\nspecify --no-lvm-storage if"
                                   " you are not using lvm" % vgstatus)
Iustin Pop's avatar
Iustin Pop committed
472

473
474
    self.op.file_storage_dir = os.path.normpath(self.op.file_storage_dir)

475
476
477
478
479
    if not os.path.isabs(self.op.file_storage_dir):
      raise errors.OpPrereqError("The file storage directory you have is"
                                 " not an absolute path.")

    if not os.path.exists(self.op.file_storage_dir):
480
481
482
483
484
485
486
487
488
489
      try:
        os.makedirs(self.op.file_storage_dir, 0750)
      except OSError, err:
        raise errors.OpPrereqError("Cannot create file storage directory"
                                   " '%s': %s" %
                                   (self.op.file_storage_dir, err))

    if not os.path.isdir(self.op.file_storage_dir):
      raise errors.OpPrereqError("The file storage directory '%s' is not"
                                 " a directory." % self.op.file_storage_dir)
490

Iustin Pop's avatar
Iustin Pop committed
491
492
    if not re.match("^[0-9a-z]{2}:[0-9a-z]{2}:[0-9a-z]{2}$",
                    self.op.mac_prefix):
493
494
      raise errors.OpPrereqError("Invalid mac prefix given '%s'" %
                                 self.op.mac_prefix)
Iustin Pop's avatar
Iustin Pop committed
495

496
    if self.op.hypervisor_type not in constants.HYPER_TYPES:
497
498
      raise errors.OpPrereqError("Invalid hypervisor type given '%s'" %
                                 self.op.hypervisor_type)
Iustin Pop's avatar
Iustin Pop committed
499

500
501
    result = utils.RunCmd(["ip", "link", "show", "dev", self.op.master_netdev])
    if result.failed:
502
      raise errors.OpPrereqError("Invalid master netdev given (%s): '%s'" %
Iustin Pop's avatar
Iustin Pop committed
503
504
                                 (self.op.master_netdev,
                                  result.output.strip()))
505

506
507
    if not (os.path.isfile(constants.NODE_INITD_SCRIPT) and
            os.access(constants.NODE_INITD_SCRIPT, os.X_OK)):
508
509
      raise errors.OpPrereqError("Init.d script '%s' missing or not"
                                 " executable." % constants.NODE_INITD_SCRIPT)
510

Iustin Pop's avatar
Iustin Pop committed
511
512
513
514
515
516
517
518
  def Exec(self, feedback_fn):
    """Initialize the cluster.

    """
    clustername = self.clustername
    hostname = self.hostname

    # set up the simple store
519
    self.sstore = ss = ssconf.SimpleStore()
Iustin Pop's avatar
Iustin Pop committed
520
    ss.SetKey(ss.SS_HYPERVISOR, self.op.hypervisor_type)
521
522
    ss.SetKey(ss.SS_MASTER_NODE, hostname.name)
    ss.SetKey(ss.SS_MASTER_IP, clustername.ip)
523
    ss.SetKey(ss.SS_MASTER_NETDEV, self.op.master_netdev)
524
    ss.SetKey(ss.SS_CLUSTER_NAME, clustername.name)
525
    ss.SetKey(ss.SS_FILE_STORAGE_DIR, self.op.file_storage_dir)
Iustin Pop's avatar
Iustin Pop committed
526
527
528
529
530

    # set up the inter-node password and certificate
    _InitGanetiServerSetup(ss)

    # start the master ip
531
    rpc.call_node_start_master(hostname.name)
Iustin Pop's avatar
Iustin Pop committed
532
533

    # set up ssh config and /etc/hosts
534
    f = open(constants.SSH_HOST_RSA_PUB, 'r')
Iustin Pop's avatar
Iustin Pop committed
535
536
537
538
539
540
    try:
      sshline = f.read()
    finally:
      f.close()
    sshkey = sshline.split(" ")[1]

541
    _AddHostToEtcHosts(hostname.name)
542
    _InitSSHSetup(hostname.name)
Iustin Pop's avatar
Iustin Pop committed
543
544

    # init of cluster config file
545
    self.cfg = cfgw = config.ConfigWriter()
546
    cfgw.InitConfig(hostname.name, hostname.ip, self.secondary_ip,
547
                    sshkey, self.op.mac_prefix,
Iustin Pop's avatar
Iustin Pop committed
548
549
                    self.op.vg_name, self.op.def_bridge)

550
551
    ssh.WriteKnownHostsFile(cfgw, ss, constants.SSH_KNOWN_HOSTS_FILE)

Iustin Pop's avatar
Iustin Pop committed
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566

class LUDestroyCluster(NoHooksLU):
  """Logical unit for destroying the cluster.

  """
  _OP_REQP = []

  def CheckPrereq(self):
    """Check prerequisites.

    This checks whether the cluster is empty.

    Any errors are signalled by raising errors.OpPrereqError.

    """
567
    master = self.sstore.GetMasterNode()
Iustin Pop's avatar
Iustin Pop committed
568
569

    nodelist = self.cfg.GetNodeList()
570
    if len(nodelist) != 1 or nodelist[0] != master:
571
572
      raise errors.OpPrereqError("There are still %d node(s) in"
                                 " this cluster." % (len(nodelist) - 1))
573
574
    instancelist = self.cfg.GetInstanceList()
    if instancelist:
575
576
      raise errors.OpPrereqError("There are still %d instance(s) in"
                                 " this cluster." % len(instancelist))
Iustin Pop's avatar
Iustin Pop committed
577
578
579
580
581

  def Exec(self, feedback_fn):
    """Destroys the cluster.

    """
582
    master = self.sstore.GetMasterNode()
583
584
    if not rpc.call_node_stop_master(master):
      raise errors.OpExecError("Could not disable the master role")
585
586
587
    priv_key, pub_key, _ = ssh.GetUserFiles(constants.GANETI_RUNAS)
    utils.CreateBackup(priv_key)
    utils.CreateBackup(pub_key)
588
    rpc.call_node_leave_cluster(master)
Iustin Pop's avatar
Iustin Pop committed
589
590
591
592
593
594


class LUVerifyCluster(NoHooksLU):
  """Verifies the cluster status.

  """
595
  _OP_REQP = ["skip_checks"]
Iustin Pop's avatar
Iustin Pop committed
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610

  def _VerifyNode(self, node, file_list, local_cksum, vglist, node_result,
                  remote_version, feedback_fn):
    """Run multiple tests against a node.

    Test list:
      - compares ganeti version
      - checks vg existance and size > 20G
      - checks config file checksum
      - checks ssh to other nodes

    Args:
      node: name of the node to check
      file_list: required list of files
      local_cksum: dictionary of local files and their checksums
611

Iustin Pop's avatar
Iustin Pop committed
612
613
614
615
    """
    # compares ganeti version
    local_version = constants.PROTOCOL_VERSION
    if not remote_version:
616
      feedback_fn("  - ERROR: connection to %s failed" % (node))
Iustin Pop's avatar
Iustin Pop committed
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
      return True

    if local_version != remote_version:
      feedback_fn("  - ERROR: sw version mismatch: master %s, node(%s) %s" %
                      (local_version, node, remote_version))
      return True

    # checks vg existance and size > 20G

    bad = False
    if not vglist:
      feedback_fn("  - ERROR: unable to check volume groups on node %s." %
                      (node,))
      bad = True
    else:
      vgstatus = _HasValidVG(vglist, self.cfg.GetVGName())
      if vgstatus:
        feedback_fn("  - ERROR: %s on node %s" % (vgstatus, node))
        bad = True

    # checks config file checksum
    # checks ssh to any

    if 'filelist' not in node_result:
      bad = True
      feedback_fn("  - ERROR: node hasn't returned file checksum data")
    else:
      remote_cksum = node_result['filelist']
      for file_name in file_list:
        if file_name not in remote_cksum:
          bad = True
          feedback_fn("  - ERROR: file '%s' missing" % file_name)
        elif remote_cksum[file_name] != local_cksum[file_name]:
          bad = True
          feedback_fn("  - ERROR: file '%s' has wrong checksum" % file_name)

    if 'nodelist' not in node_result:
      bad = True
      feedback_fn("  - ERROR: node hasn't returned node connectivity data")
    else:
      if node_result['nodelist']:
        bad = True
        for node in node_result['nodelist']:
          feedback_fn("  - ERROR: communication with node '%s': %s" %
                          (node, node_result['nodelist'][node]))
    hyp_result = node_result.get('hypervisor', None)
    if hyp_result is not None:
      feedback_fn("  - ERROR: hypervisor verify failure: '%s'" % hyp_result)
    return bad

667
668
  def _VerifyInstance(self, instance, instanceconfig, node_vol_is,
                      node_instance, feedback_fn):
Iustin Pop's avatar
Iustin Pop committed
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
    """Verify an instance.

    This function checks to see if the required block devices are
    available on the instance's node.

    """
    bad = False

    node_current = instanceconfig.primary_node

    node_vol_should = {}
    instanceconfig.MapLVsByNode(node_vol_should)

    for node in node_vol_should:
      for volume in node_vol_should[node]:
        if node not in node_vol_is or volume not in node_vol_is[node]:
          feedback_fn("  - ERROR: volume %s missing on node %s" %
                          (volume, node))
          bad = True

    if not instanceconfig.status == 'down':
690
691
      if (node_current not in node_instance or
          not instance in node_instance[node_current]):
Iustin Pop's avatar
Iustin Pop committed
692
693
694
695
696
697
698
699
700
701
702
        feedback_fn("  - ERROR: instance %s not running on node %s" %
                        (instance, node_current))
        bad = True

    for node in node_instance:
      if (not node == node_current):
        if instance in node_instance[node]:
          feedback_fn("  - ERROR: instance %s should not run on node %s" %
                          (instance, node))
          bad = True

703
    return bad
Iustin Pop's avatar
Iustin Pop committed
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736

  def _VerifyOrphanVolumes(self, node_vol_should, node_vol_is, feedback_fn):
    """Verify if there are any unknown volumes in the cluster.

    The .os, .swap and backup volumes are ignored. All other volumes are
    reported as unknown.

    """
    bad = False

    for node in node_vol_is:
      for volume in node_vol_is[node]:
        if node not in node_vol_should or volume not in node_vol_should[node]:
          feedback_fn("  - ERROR: volume %s on node %s should not exist" %
                      (volume, node))
          bad = True
    return bad

  def _VerifyOrphanInstances(self, instancelist, node_instance, feedback_fn):
    """Verify the list of running instances.

    This checks what instances are running but unknown to the cluster.

    """
    bad = False
    for node in node_instance:
      for runninginstance in node_instance[node]:
        if runninginstance not in instancelist:
          feedback_fn("  - ERROR: instance %s on node %s should not exist" %
                          (runninginstance, node))
          bad = True
    return bad

737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
  def _VerifyNPlusOneMemory(self, node_info, instance_cfg, feedback_fn):
    """Verify N+1 Memory Resilience.

    Check that if one single node dies we can still start all the instances it
    was primary for.

    """
    bad = False

    for node, nodeinfo in node_info.iteritems():
      # This code checks that every node which is now listed as secondary has
      # enough memory to host all instances it is supposed to should a single
      # other node in the cluster fail.
      # FIXME: not ready for failover to an arbitrary node
      # FIXME: does not support file-backed instances
      # WARNING: we currently take into account down instances as well as up
      # ones, considering that even if they're down someone might want to start
      # them even in the event of a node failure.
      for prinode, instances in nodeinfo['sinst-by-pnode'].iteritems():
        needed_mem = 0
        for instance in instances:
          needed_mem += instance_cfg[instance].memory
        if nodeinfo['mfree'] < needed_mem:
          feedback_fn("  - ERROR: not enough memory on node %s to accomodate"
                      " failovers should node %s fail" % (node, prinode))
          bad = True
    return bad

Iustin Pop's avatar
Iustin Pop committed
765
766
767
  def CheckPrereq(self):
    """Check prerequisites.

768
769
    Transform the list of checks we're going to skip into a set and check that
    all its members are valid.
Iustin Pop's avatar
Iustin Pop committed
770
771

    """
772
773
774
    self.skip_set = frozenset(self.op.skip_checks)
    if not constants.VERIFY_OPTIONAL_CHECKS.issuperset(self.skip_set):
      raise errors.OpPrereqError("Invalid checks to be skipped specified")
Iustin Pop's avatar
Iustin Pop committed
775
776
777
778
779
780
781

  def Exec(self, feedback_fn):
    """Verify integrity of cluster, performing various test on nodes.

    """
    bad = False
    feedback_fn("* Verifying global settings")
782
783
    for msg in self.cfg.VerifyConfig():
      feedback_fn("  - ERROR: %s" % msg)
Iustin Pop's avatar
Iustin Pop committed
784
785
786
787

    vg_name = self.cfg.GetVGName()
    nodelist = utils.NiceSort(self.cfg.GetNodeList())
    instancelist = utils.NiceSort(self.cfg.GetInstanceList())
788
    i_non_redundant = [] # Non redundant instances
Iustin Pop's avatar
Iustin Pop committed
789
790
    node_volume = {}
    node_instance = {}
791
    node_info = {}
Guido Trotter's avatar
Guido Trotter committed
792
    instance_cfg = {}
Iustin Pop's avatar
Iustin Pop committed
793
794
795

    # FIXME: verify OS list
    # do local checksums
796
797
798
    file_names = list(self.sstore.GetFileList())
    file_names.append(constants.SSL_CERT_FILE)
    file_names.append(constants.CLUSTER_CONF_FILE)
Iustin Pop's avatar
Iustin Pop committed
799
800
801
802
803
804
805
806
807
808
809
810
811
    local_checksums = utils.FingerprintFiles(file_names)

    feedback_fn("* Gathering data (%d nodes)" % len(nodelist))
    all_volumeinfo = rpc.call_volume_list(nodelist, vg_name)
    all_instanceinfo = rpc.call_instance_list(nodelist)
    all_vglist = rpc.call_vg_list(nodelist)
    node_verify_param = {
      'filelist': file_names,
      'nodelist': nodelist,
      'hypervisor': None,
      }
    all_nvinfo = rpc.call_node_verify(nodelist, node_verify_param)
    all_rversion = rpc.call_version(nodelist)
812
    all_ninfo = rpc.call_node_info(nodelist, self.cfg.GetVGName())
Iustin Pop's avatar
Iustin Pop committed
813
814
815
816
817
818
819
820
821
822
823

    for node in nodelist:
      feedback_fn("* Verifying node %s" % node)
      result = self._VerifyNode(node, file_names, local_checksums,
                                all_vglist[node], all_nvinfo[node],
                                all_rversion[node], feedback_fn)
      bad = bad or result

      # node_volume
      volumeinfo = all_volumeinfo[node]

824
825
826
827
828
829
      if isinstance(volumeinfo, basestring):
        feedback_fn("  - ERROR: LVM problem on node %s: %s" %
                    (node, volumeinfo[-400:].encode('string_escape')))
        bad = True
        node_volume[node] = {}
      elif not isinstance(volumeinfo, dict):
Iustin Pop's avatar
Iustin Pop committed
830
831
832
        feedback_fn("  - ERROR: connection to %s failed" % (node,))
        bad = True
        continue
833
834
      else:
        node_volume[node] = volumeinfo
Iustin Pop's avatar
Iustin Pop committed
835
836
837
838
839
840
841
842
843
844

      # node_instance
      nodeinstance = all_instanceinfo[node]
      if type(nodeinstance) != list:
        feedback_fn("  - ERROR: connection to %s failed" % (node,))
        bad = True
        continue

      node_instance[node] = nodeinstance

845
846
847
848
849
850
851
852
853
854
855
      # node_info
      nodeinfo = all_ninfo[node]
      if not isinstance(nodeinfo, dict):
        feedback_fn("  - ERROR: connection to %s failed" % (node,))
        bad = True
        continue

      try:
        node_info[node] = {
          "mfree": int(nodeinfo['memory_free']),
          "dfree": int(nodeinfo['vg_free']),
856
857
          "pinst": [],
          "sinst": [],
858
859
860
861
862
863
864
          # dictionary holding all instances this node is secondary for,
          # grouped by their primary node. Each key is a cluster node, and each
          # value is a list of instances which have the key as primary and the
          # current node as secondary.  this is handy to calculate N+1 memory
          # availability if you can only failover from a primary to its
          # secondary.
          "sinst-by-pnode": {},
865
866
867
868
869
870
        }
      except ValueError:
        feedback_fn("  - ERROR: invalid value returned from node %s" % (node,))
        bad = True
        continue

Iustin Pop's avatar
Iustin Pop committed
871
872
873
874
875
    node_vol_should = {}

    for instance in instancelist:
      feedback_fn("* Verifying instance %s" % instance)
      inst_config = self.cfg.GetInstanceInfo(instance)
876
877
878
      result =  self._VerifyInstance(instance, inst_config, node_volume,
                                     node_instance, feedback_fn)
      bad = bad or result
Iustin Pop's avatar
Iustin Pop committed
879
880
881

      inst_config.MapLVsByNode(node_vol_should)

Guido Trotter's avatar
Guido Trotter committed
882
883
      instance_cfg[instance] = inst_config

884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
      pnode = inst_config.primary_node
      if pnode in node_info:
        node_info[pnode]['pinst'].append(instance)
      else:
        feedback_fn("  - ERROR: instance %s, connection to primary node"
                    " %s failed" % (instance, pnode))
        bad = True

      # If the instance is non-redundant we cannot survive losing its primary
      # node, so we are not N+1 compliant. On the other hand we have no disk
      # templates with more than one secondary so that situation is not well
      # supported either.
      # FIXME: does not support file-backed instances
      if len(inst_config.secondary_nodes) == 0:
        i_non_redundant.append(instance)
      elif len(inst_config.secondary_nodes) > 1:
        feedback_fn("  - WARNING: multiple secondaries for instance %s"
                    % instance)

      for snode in inst_config.secondary_nodes:
        if snode in node_info:
          node_info[snode]['sinst'].append(instance)
906
907
908
          if pnode not in node_info[snode]['sinst-by-pnode']:
            node_info[snode]['sinst-by-pnode'][pnode] = []
          node_info[snode]['sinst-by-pnode'][pnode].append(instance)
909
910
911
912
        else:
          feedback_fn("  - ERROR: instance %s, connection to secondary node"
                      " %s failed" % (instance, snode))

Iustin Pop's avatar
Iustin Pop committed
913
914
915
916
917
918
919
920
921
922
    feedback_fn("* Verifying orphan volumes")
    result = self._VerifyOrphanVolumes(node_vol_should, node_volume,
                                       feedback_fn)
    bad = bad or result

    feedback_fn("* Verifying remaining instances")
    result = self._VerifyOrphanInstances(instancelist, node_instance,
                                         feedback_fn)
    bad = bad or result

923
924
925
926
    if constants.VERIFY_NPLUSONE_MEM not in self.skip_set:
      feedback_fn("* Verifying N+1 Memory redundancy")
      result = self._VerifyNPlusOneMemory(node_info, instance_cfg, feedback_fn)
      bad = bad or result
927
928
929
930
931
932

    feedback_fn("* Other Notes")
    if i_non_redundant:
      feedback_fn("  - NOTICE: %d non-redundant instance(s) found."
                  % len(i_non_redundant))

Iustin Pop's avatar
Iustin Pop committed
933
934
935
    return int(bad)


Iustin Pop's avatar
Iustin Pop committed
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
class LUVerifyDisks(NoHooksLU):
  """Verifies the cluster disks status.

  """
  _OP_REQP = []

  def CheckPrereq(self):
    """Check prerequisites.

    This has no prerequisites.

    """
    pass

  def Exec(self, feedback_fn):
    """Verify integrity of cluster disks.

    """
954
    result = res_nodes, res_nlvm, res_instances, res_missing = [], {}, [], {}
Iustin Pop's avatar
Iustin Pop committed
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982

    vg_name = self.cfg.GetVGName()
    nodes = utils.NiceSort(self.cfg.GetNodeList())
    instances = [self.cfg.GetInstanceInfo(name)
                 for name in self.cfg.GetInstanceList()]

    nv_dict = {}
    for inst in instances:
      inst_lvs = {}
      if (inst.status != "up" or
          inst.disk_template not in constants.DTS_NET_MIRROR):
        continue
      inst.MapLVsByNode(inst_lvs)
      # transform { iname: {node: [vol,],},} to {(node, vol): iname}
      for node, vol_list in inst_lvs.iteritems():
        for vol in vol_list:
          nv_dict[(node, vol)] = inst

    if not nv_dict:
      return result

    node_lvs = rpc.call_volume_list(nodes, vg_name)

    to_act = set()
    for node in nodes:
      # node_volume
      lvs = node_lvs[node]

983
984
985
986
      if isinstance(lvs, basestring):
        logger.Info("error enumerating LVs on node %s: %s" % (node, lvs))
        res_nlvm[node] = lvs
      elif not isinstance(lvs, dict):
Iustin Pop's avatar
Iustin Pop committed
987
988
989
990
991
992
        logger.Info("connection to node %s failed or invalid data returned" %
                    (node,))
        res_nodes.append(node)
        continue

      for lv_name, (_, lv_inactive, lv_online) in lvs.iteritems():
993
994
995
        inst = nv_dict.pop((node, lv_name), None)
        if (not lv_online and inst is not None
            and inst.name not in res_instances):
Iustin Pop's avatar
Iustin Pop committed
996
          res_instances.append(inst.name)
Iustin Pop's avatar
Iustin Pop committed
997

998
999
1000
1001
1002
1003
1004
    # any leftover items in nv_dict are missing LVs, let's arrange the
    # data better
    for key, inst in nv_dict.iteritems():
      if inst.name not in res_missing:
        res_missing[inst.name] = []
      res_missing[inst.name].append(key)

Iustin Pop's avatar
Iustin Pop committed
1005
1006
1007
    return result


1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
class LURenameCluster(LogicalUnit):
  """Rename the cluster.

  """
  HPATH = "cluster-rename"
  HTYPE = constants.HTYPE_CLUSTER
  _OP_REQP = ["name"]

  def BuildHooksEnv(self):
    """Build hooks env.

    """
    env = {
Iustin Pop's avatar
Iustin Pop committed
1021
      "OP_TARGET": self.sstore.GetClusterName(),
1022
1023
1024
1025
1026
1027
1028
1029
1030
      "NEW_NAME": self.op.name,
      }
    mn = self.sstore.GetMasterNode()
    return env, [mn], [mn]

  def CheckPrereq(self):
    """Verify that the passed name is a valid one.

    """
1031
    hostname = utils.HostInfo(self.op.name)
1032

1033
1034
    new_name = hostname.name
    self.ip = new_ip = hostname.ip
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
    old_name = self.sstore.GetClusterName()
    old_ip = self.sstore.GetMasterIP()
    if new_name == old_name and new_ip == old_ip:
      raise errors.OpPrereqError("Neither the name nor the IP address of the"
                                 " cluster has changed")
    if new_ip != old_ip:
      result = utils.RunCmd(["fping", "-q", new_ip])
      if not result.failed:
        raise errors.OpPrereqError("The given cluster IP address (%s) is"
                                   " reachable on the network. Aborting." %
                                   new_ip)

    self.op.name = new_name

  def Exec(self, feedback_fn):
    """Rename the cluster.

    """
    clustername = self.op.name
    ip = self.ip
    ss = self.sstore

    # shutdown the master IP
    master = ss.GetMasterNode()
    if not rpc.call_node_stop_master(master):
      raise errors.OpExecError("Could not disable the master role")

    try:
      # modify the sstore
      ss.SetKey(ss.SS_MASTER_IP, ip)
      ss.SetKey(ss.SS_CLUSTER_NAME, clustername)

      # Distribute updated ss config to all nodes
      myself = self.cfg.GetNodeInfo(master)
      dist_nodes = self.cfg.GetNodeList()
      if myself.name in dist_nodes:
        dist_nodes.remove(myself.name)

      logger.Debug("Copying updated ssconf data to all nodes")
      for keyname in [ss.SS_CLUSTER_NAME, ss.SS_MASTER_IP]:
        fname = ss.KeyToFilename(keyname)
        result = rpc.call_upload_file(dist_nodes, fname)
        for to_node in dist_nodes:
          if not result[to_node]:
            logger.Error("copy of file %s to node %s failed" %
                         (fname, to_node))
    finally:
      if not rpc.call_node_start_master(master):
1083
1084
        logger.Error("Could not re-enable the master role on the master,"
                     " please restart manually.")
1085
1086


1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
def _RecursiveCheckIfLVMBased(disk):
  """Check if the given disk or its children are lvm-based.

  Args:
    disk: ganeti.objects.Disk object

  Returns:
    boolean indicating whether a LD_LV dev_type was found or not

  """
  if disk.children:
    for chdisk in disk.children:
      if _RecursiveCheckIfLVMBased(chdisk):
        return True
  return disk.dev_type == constants.LD_LV


class LUSetClusterParams(LogicalUnit):
  """Change the parameters of the cluster.

  """
  HPATH = "cluster-modify"
  HTYPE = constants.HTYPE_CLUSTER
  _OP_REQP = []

  def BuildHooksEnv(self):
    """Build hooks env.

    """
    env = {
      "OP_TARGET": self.sstore.GetClusterName(),
      "NEW_VG_NAME": self.op.vg_name,
      }
    mn = self.sstore.GetMasterNode()
    return env, [mn], [mn]

  def CheckPrereq(self):
    """Check prerequisites.

    This checks whether the given params don't conflict and
1127
    if the given volume group is valid.
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159

    """
    if not self.op.vg_name:
      instances = [self.cfg.GetInstanceInfo(name)
                   for name in self.cfg.GetInstanceList()]
      for inst in instances:
        for disk in inst.disks:
          if _RecursiveCheckIfLVMBased(disk):
            raise errors.OpPrereqError("Cannot disable lvm storage while"
                                       " lvm-based instances exist")

    # if vg_name not None, checks given volume group on all nodes
    if self.op.vg_name:
      node_list = self.cfg.GetNodeList()
      vglist = rpc.call_vg_list(node_list)
      for node in node_list:
        vgstatus = _HasValidVG(vglist[node], self.op.vg_name)
        if vgstatus:
          raise errors.OpPrereqError("Error on node '%s': %s" %
                                     (node, vgstatus))

  def Exec(self, feedback_fn):
    """Change the parameters of the cluster.

    """
    if self.op.vg_name != self.cfg.GetVGName():
      self.cfg.SetVGName(self.op.vg_name)
    else:
      feedback_fn("Cluster LVM configuration already in desired"
                  " state, not changing")


Iustin Pop's avatar
Iustin Pop committed
1160
def _WaitForSync(cfgw, instance, proc, oneshot=False, unlock=False):
Iustin Pop's avatar
Iustin Pop committed
1161
1162
1163
1164
1165
1166
1167
  """Sleep and poll for an instance's disk to sync.

  """
  if not instance.disks:
    return True

  if not oneshot:
Iustin Pop's avatar
Iustin Pop committed
1168
    proc.LogInfo("Waiting for instance %s to sync disks." % instance.name)
Iustin Pop's avatar
Iustin Pop committed
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181

  node = instance.primary_node

  for dev in instance.disks:
    cfgw.SetDiskID(dev, node)

  retries = 0
  while True:
    max_time = 0
    done = True
    cumul_degraded = False
    rstats = rpc.call_blockdev_getmirrorstatus(node, instance.disks)
    if not rstats:
Iustin Pop's avatar
Iustin Pop committed
1182
      proc.LogWarning("Can't get any data from node %s" % node)
Iustin Pop's avatar
Iustin Pop committed
1183
1184
      retries += 1
      if retries >= 10:
1185
1186
        raise errors.RemoteError("Can't contact node %s for mirror data,"
                                 " aborting." % node)
Iustin Pop's avatar
Iustin Pop committed
1187
1188
1189
1190
1191
1192
      time.sleep(6)
      continue
    retries = 0
    for i in range(len(rstats)):
      mstat = rstats[i]
      if mstat is None:
Iustin Pop's avatar
Iustin Pop committed
1193
        proc.LogWarning("Can't compute data for node %s/%s" %
Iustin Pop's avatar
Iustin Pop committed
1194
1195
                        (node, instance.disks[i].iv_name))
        continue
1196
1197
      # we ignore the ldisk parameter
      perc_done, est_time, is_degraded, _ = mstat
Iustin Pop's avatar
Iustin Pop committed
1198
1199
1200
1201
1202
1203
1204
1205
      cumul_degraded = cumul_degraded or (is_degraded and perc_done is None)
      if perc_done is not None:
        done = False
        if est_time is not None:
          rem_time = "%d estimated seconds remaining" % est_time
          max_time = est_time
        else:
          rem_time = "no time estimate"
Iustin Pop's avatar
Iustin Pop committed
1206
1207
        proc.LogInfo("- device %s: %5.2f%% done, %s" %
                     (instance.disks[i].iv_name, perc_done, rem_time))
Iustin Pop's avatar
Iustin Pop committed
1208
1209
1210
1211
    if done or oneshot:
      break

    if unlock:
1212
1213
      #utils.Unlock('cmd')
      pass
Iustin Pop's avatar
Iustin Pop committed
1214
1215
1216
1217
    try:
      time.sleep(min(60, max_time))
    finally:
      if unlock:
1218
1219
        #utils.Lock('cmd')
        pass
Iustin Pop's avatar
Iustin Pop committed
1220
1221

  if done:
Iustin Pop's avatar
Iustin Pop committed
1222
    proc.LogInfo("Instance %s's disks are in sync." % instance.name)
Iustin Pop's avatar
Iustin Pop committed
1223
1224
1225
  return not cumul_degraded


1226
def _CheckDiskConsistency(cfgw, dev, node, on_primary, ldisk=False):
Iustin Pop's avatar
Iustin Pop committed
1227
1228
  """Check that mirrors are not degraded.

1229
1230
1231
1232
  The ldisk parameter, if True, will change the test from the
  is_degraded attribute (which represents overall non-ok status for
  the device(s)) to the ldisk (representing the local storage status).

Iustin Pop's avatar
Iustin Pop committed
1233
1234
  """
  cfgw.SetDiskID(dev, node)
1235
1236
1237
1238
  if ldisk:
    idx = 6
  else:
    idx = 5
Iustin Pop's avatar
Iustin Pop committed
1239
1240
1241
1242
1243

  result = True
  if on_primary or dev.AssembleOnSecondary():
    rstats = rpc.call_blockdev_find(node, dev)
    if not rstats:
1244
      logger.ToStderr("Node %s: Disk degraded, not found or node down" % node)
Iustin Pop's avatar
Iustin Pop committed
1245
1246
      result = False
    else:
1247
      result = result and (not rstats[idx])
Iustin Pop's avatar
Iustin Pop committed
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
  if dev.children:
    for child in dev.children:
      result = result and _CheckDiskConsistency(cfgw, child, node, on_primary)

  return result


class LUDiagnoseOS(NoHooksLU):
  """Logical unit for OS diagnose/query.

  """
1259
  _OP_REQP = ["output_fields", "names"]
Iustin Pop's avatar
Iustin Pop committed
1260
1261
1262
1263
1264
1265
1266

  def CheckPrereq(self):
    """Check prerequisites.

    This always succeeds, since this is a pure query LU.

    """
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
    if self.op.names:
      raise errors.OpPrereqError("Selective OS query not supported")

    self.dynamic_fields = frozenset(["name", "valid", "node_status"])
    _CheckOutputFields(static=[],
                       dynamic=self.dynamic_fields,
                       selected=self.op.output_fields)

  @staticmethod
  def _DiagnoseByOS(node_list, rlist):
    """Remaps a per-node return list into an a per-os per-node dictionary

      Args:
        node_list: a list with the names of all nodes
        rlist: a map with node names as keys and OS objects as values

      Returns:
        map: a map with osnames as keys and as value another map, with
             nodes as
             keys and list of OS objects as values
             e.g. {"debian-etch": {"node1": [<object>,...],
                                   "node2": [<object>,]}
                  }

    """
    all_os = {}
    for node_name, nr in rlist.iteritems():
      if not nr:
        continue
Iustin Pop's avatar
Iustin Pop committed
1296
1297
      for os_obj in nr:
        if os_obj.name not in all_os:
1298
1299
          # build a list of nodes for this os containing empty lists
          # for each node in node_list
Iustin Pop's avatar
Iustin Pop committed
1300
          all_os[os_obj.name] = {}
1301
          for nname in node_list:
Iustin Pop's avatar
Iustin Pop committed
1302
1303
            all_os[os_obj.name][nname] = []
        all_os[os_obj.name][node_name].append(os_obj)
1304
    return all_os
Iustin Pop's avatar
Iustin Pop committed
1305
1306
1307
1308
1309
1310
1311
1312

  def Exec(self, feedback_fn):
    """Compute the list of OSes.

    """
    node_list = self.cfg.GetNodeList()
    node_data = rpc.call_os_diagnose(node_list)
    if node_data == False:
1313
      raise errors.OpExecError("Can't gather the list of OSes")
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
    pol = self._DiagnoseByOS(node_list, node_data)
    output = []
    for os_name, os_data in pol.iteritems():
      row = []
      for field in self.op.output_fields:
        if field == "name":
          val = os_name
        elif field == "valid":
          val = utils.all([osl and osl[0] for osl in os_data.values()])
        elif field == "node_status":
          val = {}
          for node_name, nos_list in os_data.iteritems():
            val[node_name] = [(v.status, v.path) for v in nos_list]
        else:
          raise errors.ParameterError(field)
        row.append(val)
      output.append(row)

    return output
Iustin Pop's avatar
Iustin Pop committed
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349


class LURemoveNode(LogicalUnit):
  """Logical unit for removing a node.

  """
  HPATH = "node-remove"
  HTYPE = constants.HTYPE_NODE
  _OP_REQP = ["node_name"]

  def BuildHooksEnv(self):
    """Build hooks env.

    This doesn't run on the target node in the pre phase as a failed
    node would not allows itself to run.

    """
1350
    env = {
1351
      "OP_TARGET": self.op.node_name,
1352
1353
      "NODE_NAME": self.op.node_name,
      }
Iustin Pop's avatar
Iustin Pop committed
1354
1355
    all_nodes = self.cfg.GetNodeList()
    all_nodes.remove(self.op.node_name)
1356
    return env, all_nodes, all_nodes
Iustin Pop's avatar
Iustin Pop committed
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370

  def CheckPrereq(self):
    """Check prerequisites.

    This checks:
     - the node exists in the configuration
     - it does not have primary or secondary instances
     - it's not the master

    Any errors are signalled by raising errors.OpPrereqError.

    """
    node = self.cfg.GetNodeInfo(self.cfg.ExpandNodeName(self.op.node_name))
    if node is None:
1371
      raise errors.OpPrereqError, ("Node '%s' is unknown." % self.op.node_name)
Iustin Pop's avatar
Iustin Pop committed
1372
1373
1374

    instance_list = self.cfg.GetInstanceList()

1375
    masternode = self.sstore.GetMasterNode()
Iustin Pop's avatar
Iustin Pop committed
1376
    if node.name == masternode:
1377
1378
      raise errors.OpPrereqError("Node is the master node,"
                                 " you need to failover first.")
Iustin Pop's avatar
Iustin Pop committed
1379
1380
1381
1382

    for instance_name in instance_list:
      instance = self.cfg.GetInstanceInfo(instance_name)
      if node.name == instance.primary_node:
1383
1384
        raise errors.OpPrereqError("Instance %s still running on the node,"
                                   " please remove first." % instance_name)
Iustin Pop's avatar
Iustin Pop committed
1385
      if node.name in instance.secondary_nodes:
1386
1387
        raise errors.OpPrereqError("Instance %s has node as a secondary,"
                                   " please remove first." % instance_name)
Iustin Pop's avatar
Iustin Pop committed
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
    self.op.node_name = node.name
    self.node = node

  def Exec(self, feedback_fn):
    """Removes the node from the cluster.

    """
    node = self.node
    logger.Info("stopping the node daemon and removing configs from node %s" %
                node.name)

    rpc.call_node_leave_cluster(node.name)

1401
    self.ssh.Run(node.name, 'root', "%s stop" % constants.NODE_INITD_SCRIPT)
Iustin Pop's avatar
Iustin Pop committed
1402
1403
1404
1405
1406

    logger.Info("Removing node %s from config" % node.name)

    self.cfg.RemoveNode(node.name)

1407
1408
    _RemoveHostFromEtcHosts(node.name)

Iustin Pop's avatar
Iustin Pop committed
1409
1410
1411
1412
1413

class LUQueryNodes(NoHooksLU):
  """Logical unit for querying nodes.

  """
1414
  _OP_REQP = ["output_fields", "names"]
Iustin Pop's avatar
Iustin Pop committed
1415
1416
1417
1418
1419
1420
1421
1422

  def CheckPrereq(self):
    """Check prerequisites.

    This checks that the fields required are valid output fields.

    """
    self.dynamic_fields = frozenset(["dtotal", "dfree",
1423
1424
                                     "mtotal", "mnode", "mfree",
                                     "bootid"])
Iustin Pop's avatar
Iustin Pop committed
1425

1426
1427
1428
    _CheckOutputFields(static=["name", "pinst_cnt", "sinst_cnt",
                               "pinst_list", "sinst_list",
                               "pip", "sip"],
1429
1430
                       dynamic=self.dynamic_fields,
                       selected=self.op.output_fields)
Iustin Pop's avatar
Iustin Pop committed
1431

1432
    self.wanted = _GetWantedNodes(self, self.op.names)
Iustin Pop's avatar
Iustin Pop committed
1433
1434
1435
1436
1437

  def Exec(self, feedback_fn):
    """Computes the list of nodes and their attributes.

    """
1438
    nodenames = self.wanted
Iustin Pop's avatar
Iustin Pop committed
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
    nodelist = [self.cfg.GetNodeInfo(name) for name in nodenames]

    # begin data gathering

    if self.dynamic_fields.intersection(self.op.output_fields):
      live_data = {}
      node_data = rpc.call_node_info(nodenames, self.cfg.GetVGName())
      for name in nodenames:
        nodeinfo = node_data.get(name, None)
        if nodeinfo:
          live_data[name] = {
            "mtotal": utils.TryConvert(int, nodeinfo['memory_total']),
            "mnode": utils.TryConvert(int, nodeinfo['memory_dom0']),
            "mfree": utils.TryConvert(int, nodeinfo['memory_free']),
            "dtotal": utils.TryConvert(int, nodeinfo['vg_size']),
            "dfree": utils.TryConvert(int, nodeinfo['vg_free']),
1455
            "bootid": nodeinfo['bootid'],
Iustin Pop's avatar
Iustin Pop committed
1456
1457
1458
1459
1460
1461
            }
        else:
          live_data[name] = {}
    else:
      live_data = dict.fromkeys(nodenames, {})

1462
1463
    node_to_primary = dict([(name, set()) for name in nodenames])
    node_to_secondary = dict([(name, set()) for name in nodenames])
Iustin Pop's avatar
Iustin Pop committed
1464

1465
1466
1467
    inst_fields = frozenset(("pinst_cnt", "pinst_list",
                             "sinst_cnt", "sinst_list"))
    if inst_fields & frozenset(self.op.output_fields):
Iustin Pop's avatar
Iustin Pop committed
1468
1469
      instancelist = self.cfg.GetInstanceList()

1470
1471
1472
1473
1474
1475
1476
      for instance_name in instancelist:
        inst = self.cfg.GetInstanceInfo(instance_name)
        if inst.primary_node in node_to_primary:
          node_to_primary[inst.primary_node].add(inst.name)
        for secnode in inst.secondary_nodes:
          if secnode in node_to_secondary:
            node_to_secondary[secnode].add(inst.name)
Iustin Pop's avatar
Iustin Pop committed
1477
1478
1479
1480
1481