cmdlib.py 212 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

# pylint: disable-msg=W0613,W0201

import os
import os.path
import sha
import time
import tempfile
import re
import platform
33
import logging
34
import copy
35
import random
Iustin Pop's avatar
Iustin Pop committed
36
37
38
39
40

from ganeti import ssh
from ganeti import utils
from ganeti import errors
from ganeti import hypervisor
Guido Trotter's avatar
Guido Trotter committed
41
from ganeti import locking
Iustin Pop's avatar
Iustin Pop committed
42
43
44
from ganeti import constants
from ganeti import objects
from ganeti import opcodes
45
from ganeti import serializer
46
from ganeti import ssconf
47
48


Iustin Pop's avatar
Iustin Pop committed
49
class LogicalUnit(object):
50
  """Logical Unit base class.
Iustin Pop's avatar
Iustin Pop committed
51
52

  Subclasses must follow these rules:
53
54
    - implement ExpandNames
    - implement CheckPrereq
Iustin Pop's avatar
Iustin Pop committed
55
56
57
    - implement Exec
    - implement BuildHooksEnv
    - redefine HPATH and HTYPE
58
    - optionally redefine their run requirements:
59
        REQ_BGL: the LU needs to hold the Big Ganeti Lock exclusively
60
61

  Note that all commands require root permissions.
Iustin Pop's avatar
Iustin Pop committed
62
63
64
65
66

  """
  HPATH = None
  HTYPE = None
  _OP_REQP = []
67
  REQ_BGL = True
Iustin Pop's avatar
Iustin Pop committed
68

Iustin Pop's avatar
Iustin Pop committed
69
  def __init__(self, processor, op, context, rpc):
Iustin Pop's avatar
Iustin Pop committed
70
71
72
73
74
75
    """Constructor for LogicalUnit.

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

    """
Iustin Pop's avatar
Iustin Pop committed
76
    self.proc = processor
Iustin Pop's avatar
Iustin Pop committed
77
    self.op = op
Guido Trotter's avatar
Guido Trotter committed
78
79
    self.cfg = context.cfg
    self.context = context
Iustin Pop's avatar
Iustin Pop committed
80
    self.rpc = rpc
81
    # Dicts used to declare locking needs to mcpu
82
    self.needed_locks = None
83
    self.acquired_locks = {}
Guido Trotter's avatar
Guido Trotter committed
84
    self.share_locks = dict(((i, 0) for i in locking.LEVELS))
85
86
    self.add_locks = {}
    self.remove_locks = {}
87
88
    # Used to force good behavior when calling helper functions
    self.recalculate_locks = {}
89
    self.__ssh = None
90
91
92
    # logging
    self.LogWarning = processor.LogWarning
    self.LogInfo = processor.LogInfo
93

Iustin Pop's avatar
Iustin Pop committed
94
95
96
    for attr_name in self._OP_REQP:
      attr_val = getattr(op, attr_name, None)
      if attr_val is None:
97
98
        raise errors.OpPrereqError("Required parameter '%s' missing" %
                                   attr_name)
99
    self.CheckArguments()
Iustin Pop's avatar
Iustin Pop committed
100

101
102
103
104
105
  def __GetSSH(self):
    """Returns the SshRunner object

    """
    if not self.__ssh:
106
      self.__ssh = ssh.SshRunner(self.cfg.GetClusterName())
107
108
109
110
    return self.__ssh

  ssh = property(fget=__GetSSH)

111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
  def CheckArguments(self):
    """Check syntactic validity for the opcode arguments.

    This method is for doing a simple syntactic check and ensure
    validity of opcode parameters, without any cluster-related
    checks. While the same can be accomplished in ExpandNames and/or
    CheckPrereq, doing these separate is better because:

      - ExpandNames is left as as purely a lock-related function
      - CheckPrereq is run after we have aquired locks (and possible
        waited for them)

    The function is allowed to change the self.op attribute so that
    later methods can no longer worry about missing parameters.

    """
    pass

129
130
131
132
133
134
135
136
137
138
139
  def ExpandNames(self):
    """Expand names for this LU.

    This method is called before starting to execute the opcode, and it should
    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). This way locking, hooks, logging, ecc. can work correctly.

    LUs which implement this method must also populate the self.needed_locks
    member, as a dict with lock levels as keys, and a list of needed lock names
    as values. Rules:
140
141
142
143
144

      - use an empty dict if you don't need any lock
      - if you don't need any lock at a particular level omit that level
      - don't put anything for the BGL level
      - if you want all locks at a level use locking.ALL_SET as a value
145

Guido Trotter's avatar
Guido Trotter committed
146
147
148
149
    If you need to share locks (rather than acquire them exclusively) at one
    level you can modify self.share_locks, setting a true value (usually 1) for
    that level. By default locks are not shared.

150
151
152
153
154
155
156
157
158
159
160
161
162
    Examples::

      # Acquire all nodes and one instance
      self.needed_locks = {
        locking.LEVEL_NODE: locking.ALL_SET,
        locking.LEVEL_INSTANCE: ['instance1.example.tld'],
      }
      # Acquire just two nodes
      self.needed_locks = {
        locking.LEVEL_NODE: ['node1.example.tld', 'node2.example.tld'],
      }
      # Acquire no locks
      self.needed_locks = {} # No, you can't leave it to the default value None
163
164
165
166
167
168
169
170
171
172

    """
    # The implementation of this method is mandatory only if the new LU is
    # concurrent, so that old LUs don't need to be changed all at the same
    # time.
    if self.REQ_BGL:
      self.needed_locks = {} # Exclusive LUs don't need locks.
    else:
      raise NotImplementedError

Guido Trotter's avatar
Guido Trotter committed
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
  def DeclareLocks(self, level):
    """Declare LU locking needs for a level

    While most LUs can just declare their locking needs at ExpandNames time,
    sometimes there's the need to calculate some locks after having acquired
    the ones before. This function is called just before acquiring locks at a
    particular level, but after acquiring the ones at lower levels, and permits
    such calculations. It can be used to modify self.needed_locks, and by
    default it does nothing.

    This function is only called if you have something already set in
    self.needed_locks for the level.

    @param level: Locking level which is going to be locked
    @type level: member of ganeti.locking.LEVELS

    """

Iustin Pop's avatar
Iustin Pop committed
191
192
193
194
195
196
197
198
199
200
201
202
  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
203
    their canonical form if it hasn't been done by ExpandNames before.
Iustin Pop's avatar
Iustin Pop committed
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231

    """
    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.

232
    No nodes should be returned as an empty list (and not None).
Iustin Pop's avatar
Iustin Pop committed
233
234
235
236
237
238
239

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

    """
    raise NotImplementedError

240
241
242
243
244
245
246
247
248
  def HooksCallBack(self, phase, hook_results, feedback_fn, lu_result):
    """Notify the LU about the results of its hooks.

    This method is called every time a hooks phase is executed, and notifies
    the Logical Unit about the hooks' result. The LU can then use it to alter
    its result based on the hooks.  By default the method does nothing and the
    previous result is passed back unchanged but any LU can define it if it
    wants to use the local cluster hook-scripts somehow.

249
250
251
252
253
254
255
256
    @param phase: one of L{constants.HOOKS_PHASE_POST} or
        L{constants.HOOKS_PHASE_PRE}; it denotes the hooks phase
    @param hook_results: the results of the multi-node hooks rpc call
    @param feedback_fn: function used send feedback back to the caller
    @param lu_result: the previous Exec result this LU had, or None
        in the PRE phase
    @return: the new Exec result, based on the previous result
        and hook results
257
258
259
260

    """
    return lu_result

261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
  def _ExpandAndLockInstance(self):
    """Helper function to expand and lock an instance.

    Many LUs that work on an instance take its name in self.op.instance_name
    and need to expand it and then declare the expanded name for locking. This
    function does it, and then updates self.op.instance_name to the expanded
    name. It also initializes needed_locks as a dict, if this hasn't been done
    before.

    """
    if self.needed_locks is None:
      self.needed_locks = {}
    else:
      assert locking.LEVEL_INSTANCE not in self.needed_locks, \
        "_ExpandAndLockInstance called with instance-level locks set"
    expanded_name = self.cfg.ExpandInstanceName(self.op.instance_name)
    if expanded_name is None:
      raise errors.OpPrereqError("Instance '%s' not known" %
                                  self.op.instance_name)
    self.needed_locks[locking.LEVEL_INSTANCE] = expanded_name
    self.op.instance_name = expanded_name

283
  def _LockInstancesNodes(self, primary_only=False):
284
285
286
287
288
289
290
291
292
293
294
295
296
    """Helper function to declare instances' nodes for locking.

    This function should be called after locking one or more instances to lock
    their nodes. Its effect is populating self.needed_locks[locking.LEVEL_NODE]
    with all primary or secondary nodes for instances already locked and
    present in self.needed_locks[locking.LEVEL_INSTANCE].

    It should be called from DeclareLocks, and for safety only works if
    self.recalculate_locks[locking.LEVEL_NODE] is set.

    In the future it may grow parameters to just lock some instance's nodes, or
    to just lock primaries or secondary nodes, if needed.

297
    If should be called in DeclareLocks in a way similar to::
298

299
300
      if level == locking.LEVEL_NODE:
        self._LockInstancesNodes()
301

302
303
304
    @type primary_only: boolean
    @param primary_only: only lock primary nodes of locked instances

305
306
307
308
309
310
311
312
313
314
    """
    assert locking.LEVEL_NODE in self.recalculate_locks, \
      "_LockInstancesNodes helper function called with no nodes to recalculate"

    # TODO: check if we're really been called with the instance locks held

    # For now we'll replace self.needed_locks[locking.LEVEL_NODE], but in the
    # future we might want to have different behaviors depending on the value
    # of self.recalculate_locks[locking.LEVEL_NODE]
    wanted_nodes = []
315
    for instance_name in self.acquired_locks[locking.LEVEL_INSTANCE]:
316
317
      instance = self.context.cfg.GetInstanceInfo(instance_name)
      wanted_nodes.append(instance.primary_node)
318
319
      if not primary_only:
        wanted_nodes.extend(instance.secondary_nodes)
320
321
322
323
324

    if self.recalculate_locks[locking.LEVEL_NODE] == constants.LOCKS_REPLACE:
      self.needed_locks[locking.LEVEL_NODE] = wanted_nodes
    elif self.recalculate_locks[locking.LEVEL_NODE] == constants.LOCKS_APPEND:
      self.needed_locks[locking.LEVEL_NODE].extend(wanted_nodes)
325
326
327

    del self.recalculate_locks[locking.LEVEL_NODE]

Iustin Pop's avatar
Iustin Pop committed
328
329
330
331
332
333
334
335
336
337
338
339

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


340
def _GetWantedNodes(lu, nodes):
341
  """Returns list of checked and expanded node names.
342

343
344
345
346
347
348
349
  @type lu: L{LogicalUnit}
  @param lu: the logical unit on whose behalf we execute
  @type nodes: list
  @param nodes: list of node names or None for all nodes
  @rtype: list
  @return: the list of nodes, sorted
  @raise errors.OpProgrammerError: if the nodes parameter is wrong type
350
351

  """
352
  if not isinstance(nodes, list):
353
    raise errors.OpPrereqError("Invalid argument type 'nodes'")
354

355
356
357
  if not nodes:
    raise errors.ProgrammerError("_GetWantedNodes should only be called with a"
      " non-empty list of nodes whose name is to be expanded.")
358

359
360
361
362
363
364
  wanted = []
  for name in nodes:
    node = lu.cfg.ExpandNodeName(name)
    if node is None:
      raise errors.OpPrereqError("No such node name '%s'" % name)
    wanted.append(node)
365

366
  return utils.NiceSort(wanted)
367
368
369


def _GetWantedInstances(lu, instances):
370
  """Returns list of checked and expanded instance names.
371

372
373
374
375
376
377
378
379
  @type lu: L{LogicalUnit}
  @param lu: the logical unit on whose behalf we execute
  @type instances: list
  @param instances: list of instance names or None for all instances
  @rtype: list
  @return: the list of instances, sorted
  @raise errors.OpPrereqError: if the instances parameter is wrong type
  @raise errors.OpPrereqError: if any of the passed instances is not found
380
381
382
383
384
385
386
387
388

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

  if instances:
    wanted = []

    for name in instances:
389
      instance = lu.cfg.ExpandInstanceName(name)
390
391
392
393
394
      if instance is None:
        raise errors.OpPrereqError("No such instance name '%s'" % name)
      wanted.append(instance)

  else:
395
396
    wanted = lu.cfg.GetInstanceList()
  return utils.NiceSort(wanted)
397
398
399


def _CheckOutputFields(static, dynamic, selected):
400
401
  """Checks whether all selected fields are valid.

Iustin Pop's avatar
Iustin Pop committed
402
  @type static: L{utils.FieldSet}
Iustin Pop's avatar
Iustin Pop committed
403
  @param static: static fields set
Iustin Pop's avatar
Iustin Pop committed
404
  @type dynamic: L{utils.FieldSet}
Iustin Pop's avatar
Iustin Pop committed
405
  @param dynamic: dynamic fields set
406
407

  """
Iustin Pop's avatar
Iustin Pop committed
408
  f = utils.FieldSet()
Iustin Pop's avatar
Iustin Pop committed
409
410
  f.Extend(static)
  f.Extend(dynamic)
411

Iustin Pop's avatar
Iustin Pop committed
412
413
  delta = f.NonMatching(selected)
  if delta:
414
    raise errors.OpPrereqError("Unknown output fields selected: %s"
Iustin Pop's avatar
Iustin Pop committed
415
                               % ",".join(delta))
416
417


418
def _BuildInstanceHookEnv(name, primary_node, secondary_nodes, os_type, status,
419
                          memory, vcpus, nics):
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
  """Builds instance related env variables for hooks

  This builds the hook environment from individual variables.

  @type name: string
  @param name: the name of the instance
  @type primary_node: string
  @param primary_node: the name of the instance's primary node
  @type secondary_nodes: list
  @param secondary_nodes: list of secondary nodes as strings
  @type os_type: string
  @param os_type: the name of the instance's OS
  @type status: string
  @param status: the desired status of the instances
  @type memory: string
  @param memory: the memory size of the instance
  @type vcpus: string
  @param vcpus: the count of VCPUs the instance has
  @type nics: list
  @param nics: list of tuples (ip, bridge, mac) representing
      the NICs the instance  has
  @rtype: dict
  @return: the hook environment for this instance
443

444
445
  """
  env = {
446
    "OP_TARGET": name,
447
448
449
    "INSTANCE_NAME": name,
    "INSTANCE_PRIMARY": primary_node,
    "INSTANCE_SECONDARIES": " ".join(secondary_nodes),
450
    "INSTANCE_OS_TYPE": os_type,
451
452
453
454
455
456
457
    "INSTANCE_STATUS": status,
    "INSTANCE_MEMORY": memory,
    "INSTANCE_VCPUS": vcpus,
  }

  if nics:
    nic_count = len(nics)
458
    for idx, (ip, bridge, mac) in enumerate(nics):
459
460
461
462
      if ip is None:
        ip = ""
      env["INSTANCE_NIC%d_IP" % idx] = ip
      env["INSTANCE_NIC%d_BRIDGE" % idx] = bridge
463
      env["INSTANCE_NIC%d_HWADDR" % idx] = mac
464
465
466
467
468
469
470
471
  else:
    nic_count = 0

  env["INSTANCE_NIC_COUNT"] = nic_count

  return env


Iustin Pop's avatar
Iustin Pop committed
472
def _BuildInstanceHookEnvByObject(lu, instance, override=None):
473
474
  """Builds instance related env variables for hooks from an object.

475
476
477
478
479
480
481
482
483
484
485
  @type lu: L{LogicalUnit}
  @param lu: the logical unit on whose behalf we execute
  @type instance: L{objects.Instance}
  @param instance: the instance for which we should build the
      environment
  @type override: dict
  @param override: dictionary with key/values that will override
      our values
  @rtype: dict
  @return: the hook environment dictionary

486
  """
Iustin Pop's avatar
Iustin Pop committed
487
  bep = lu.cfg.GetClusterInfo().FillBE(instance)
488
489
490
491
  args = {
    'name': instance.name,
    'primary_node': instance.primary_node,
    'secondary_nodes': instance.secondary_nodes,
492
    'os_type': instance.os,
493
    'status': instance.os,
Iustin Pop's avatar
Iustin Pop committed
494
495
    'memory': bep[constants.BE_MEMORY],
    'vcpus': bep[constants.BE_VCPUS],
496
    'nics': [(nic.ip, nic.bridge, nic.mac) for nic in instance.nics],
497
498
499
500
501
502
  }
  if override:
    args.update(override)
  return _BuildInstanceHookEnv(**args)


503
def _CheckInstanceBridgesExist(lu, instance):
504
505
506
507
508
  """Check that the brigdes needed by an instance exist.

  """
  # check bridges existance
  brlist = [nic.bridge for nic in instance.nics]
509
510
511
512
  result = lu.rpc.call_bridges_exist(instance.primary_node, brlist)
  result.Raise()
  if not result.data:
    raise errors.OpPrereqError("One or more target bridges %s does not"
513
514
515
516
                               " exist on destination node '%s'" %
                               (brlist, instance.primary_node))


Iustin Pop's avatar
Iustin Pop committed
517
518
519
520
521
522
523
524
525
526
527
528
529
530
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.

    """
Michael Hanselmann's avatar
Michael Hanselmann committed
531
    master = self.cfg.GetMasterNode()
Iustin Pop's avatar
Iustin Pop committed
532
533

    nodelist = self.cfg.GetNodeList()
534
    if len(nodelist) != 1 or nodelist[0] != master:
535
536
      raise errors.OpPrereqError("There are still %d node(s) in"
                                 " this cluster." % (len(nodelist) - 1))
537
538
    instancelist = self.cfg.GetInstanceList()
    if instancelist:
539
540
      raise errors.OpPrereqError("There are still %d instance(s) in"
                                 " this cluster." % len(instancelist))
Iustin Pop's avatar
Iustin Pop committed
541
542
543
544
545

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

    """
Michael Hanselmann's avatar
Michael Hanselmann committed
546
    master = self.cfg.GetMasterNode()
547
548
549
    result = self.rpc.call_node_stop_master(master, False)
    result.Raise()
    if not result.data:
550
      raise errors.OpExecError("Could not disable the master role")
551
552
553
    priv_key, pub_key, _ = ssh.GetUserFiles(constants.GANETI_RUNAS)
    utils.CreateBackup(priv_key)
    utils.CreateBackup(pub_key)
Iustin Pop's avatar
Iustin Pop committed
554
    return master
Iustin Pop's avatar
Iustin Pop committed
555
556


Guido Trotter's avatar
Guido Trotter committed
557
class LUVerifyCluster(LogicalUnit):
Iustin Pop's avatar
Iustin Pop committed
558
559
560
  """Verifies the cluster status.

  """
Guido Trotter's avatar
Guido Trotter committed
561
562
  HPATH = "cluster-verify"
  HTYPE = constants.HTYPE_CLUSTER
563
  _OP_REQP = ["skip_checks"]
564
565
566
567
568
569
570
571
  REQ_BGL = False

  def ExpandNames(self):
    self.needed_locks = {
      locking.LEVEL_NODE: locking.ALL_SET,
      locking.LEVEL_INSTANCE: locking.ALL_SET,
    }
    self.share_locks = dict(((i, 1) for i in locking.LEVELS))
Iustin Pop's avatar
Iustin Pop committed
572

573
574
  def _VerifyNode(self, nodeinfo, file_list, local_cksum, vglist, node_result,
                  remote_version, feedback_fn, master_files):
Iustin Pop's avatar
Iustin Pop committed
575
576
    """Run multiple tests against a node.

577
    Test list:
578

Iustin Pop's avatar
Iustin Pop committed
579
580
581
582
583
      - compares ganeti version
      - checks vg existance and size > 20G
      - checks config file checksum
      - checks ssh to other nodes

584
585
    @type nodeinfo: L{objects.Node}
    @param nodeinfo: the node to check
586
587
588
589
590
591
592
    @param file_list: required list of files
    @param local_cksum: dictionary of local files and their checksums
    @type vglist: dict
    @param vglist: dictionary of volume group names and their size
    @param node_result: the results from the node
    @param remote_version: the RPC version from the remote node
    @param feedback_fn: function used to accumulate results
593
    @param master_files: list of files that only masters should have
594

Iustin Pop's avatar
Iustin Pop committed
595
    """
596
    node = nodeinfo.name
Iustin Pop's avatar
Iustin Pop committed
597
598
599
    # compares ganeti version
    local_version = constants.PROTOCOL_VERSION
    if not remote_version:
600
      feedback_fn("  - ERROR: connection to %s failed" % (node))
Iustin Pop's avatar
Iustin Pop committed
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
      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:
616
617
      vgstatus = utils.CheckVolumeGroupSize(vglist, self.cfg.GetVGName(),
                                            constants.MIN_VG_SIZE)
Iustin Pop's avatar
Iustin Pop committed
618
619
620
621
      if vgstatus:
        feedback_fn("  - ERROR: %s on node %s" % (vgstatus, node))
        bad = True

622
623
624
625
    if not node_result:
      feedback_fn("  - ERROR: unable to verify node %s." % (node,))
      return True

Iustin Pop's avatar
Iustin Pop committed
626
627
628
629
630
631
632
633
634
    # 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:
635
636
        node_is_mc = nodeinfo.master_candidate
        must_have_file = file_name not in master_files
Iustin Pop's avatar
Iustin Pop committed
637
        if file_name not in remote_cksum:
638
639
640
          if node_is_mc or must_have_file:
            bad = True
            feedback_fn("  - ERROR: file '%s' missing" % file_name)
Iustin Pop's avatar
Iustin Pop committed
641
        elif remote_cksum[file_name] != local_cksum[file_name]:
642
643
644
645
646
647
648
649
650
651
652
653
654
          if node_is_mc or must_have_file:
            bad = True
            feedback_fn("  - ERROR: file '%s' has wrong checksum" % file_name)
          else:
            # not candidate and this is not a must-have file
            bad = True
            feedback_fn("  - ERROR: non master-candidate has old/wrong file"
                        " '%s'" % file_name)
        else:
          # all good, except non-master/non-must have combination
          if not node_is_mc and not must_have_file:
            feedback_fn("  - ERROR: file '%s' should not exist on non master"
                        " candidates" % file_name)
Iustin Pop's avatar
Iustin Pop committed
655
656
657

    if 'nodelist' not in node_result:
      bad = True
658
      feedback_fn("  - ERROR: node hasn't returned node ssh connectivity data")
Iustin Pop's avatar
Iustin Pop committed
659
660
661
662
    else:
      if node_result['nodelist']:
        bad = True
        for node in node_result['nodelist']:
663
          feedback_fn("  - ERROR: ssh communication with node '%s': %s" %
Iustin Pop's avatar
Iustin Pop committed
664
                          (node, node_result['nodelist'][node]))
665
666
667
668
669
670
671
672
673
674
675
    if 'node-net-test' not in node_result:
      bad = True
      feedback_fn("  - ERROR: node hasn't returned node tcp connectivity data")
    else:
      if node_result['node-net-test']:
        bad = True
        nlist = utils.NiceSort(node_result['node-net-test'].keys())
        for node in nlist:
          feedback_fn("  - ERROR: tcp communication with node '%s': %s" %
                          (node, node_result['node-net-test'][node]))

Iustin Pop's avatar
Iustin Pop committed
676
    hyp_result = node_result.get('hypervisor', None)
677
678
679
680
681
    if isinstance(hyp_result, dict):
      for hv_name, hv_result in hyp_result.iteritems():
        if hv_result is not None:
          feedback_fn("  - ERROR: hypervisor %s verify failure: '%s'" %
                      (hv_name, hv_result))
Iustin Pop's avatar
Iustin Pop committed
682
683
    return bad

684
685
  def _VerifyInstance(self, instance, instanceconfig, node_vol_is,
                      node_instance, feedback_fn):
Iustin Pop's avatar
Iustin Pop committed
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
    """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':
707
708
      if (node_current not in node_instance or
          not instance in node_instance[node_current]):
Iustin Pop's avatar
Iustin Pop committed
709
710
711
712
713
714
715
716
717
718
719
        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

720
    return bad
Iustin Pop's avatar
Iustin Pop committed
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753

  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

754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
  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:
Iustin Pop's avatar
Iustin Pop committed
775
          bep = self.cfg.GetClusterInfo().FillBE(instance_cfg[instance])
776
          if bep[constants.BE_AUTO_BALANCE]:
777
            needed_mem += bep[constants.BE_MEMORY]
778
779
780
781
782
783
        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
784
785
786
  def CheckPrereq(self):
    """Check prerequisites.

787
788
    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
789
790

    """
791
792
793
    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
794

Guido Trotter's avatar
Guido Trotter committed
795
796
797
798
799
800
801
802
803
804
805
806
  def BuildHooksEnv(self):
    """Build hooks env.

    Cluster-Verify hooks just rone in the post phase and their failure makes
    the output be logged in the verify output and the verification to fail.

    """
    all_nodes = self.cfg.GetNodeList()
    # TODO: populate the environment with useful information for verify hooks
    env = {}
    return env, [], all_nodes

Iustin Pop's avatar
Iustin Pop committed
807
808
809
810
811
812
  def Exec(self, feedback_fn):
    """Verify integrity of cluster, performing various test on nodes.

    """
    bad = False
    feedback_fn("* Verifying global settings")
813
814
    for msg in self.cfg.VerifyConfig():
      feedback_fn("  - ERROR: %s" % msg)
Iustin Pop's avatar
Iustin Pop committed
815
816

    vg_name = self.cfg.GetVGName()
817
    hypervisors = self.cfg.GetClusterInfo().enabled_hypervisors
Iustin Pop's avatar
Iustin Pop committed
818
    nodelist = utils.NiceSort(self.cfg.GetNodeList())
819
    nodeinfo = [self.cfg.GetNodeInfo(nname) for nname in nodelist]
Iustin Pop's avatar
Iustin Pop committed
820
    instancelist = utils.NiceSort(self.cfg.GetInstanceList())
821
    i_non_redundant = [] # Non redundant instances
822
    i_non_a_balanced = [] # Non auto-balanced instances
Iustin Pop's avatar
Iustin Pop committed
823
824
    node_volume = {}
    node_instance = {}
825
    node_info = {}
Guido Trotter's avatar
Guido Trotter committed
826
    instance_cfg = {}
Iustin Pop's avatar
Iustin Pop committed
827
828
829

    # FIXME: verify OS list
    # do local checksums
830
831
832
    master_files = [constants.CLUSTER_CONF_FILE]

    file_names = ssconf.SimpleStore().GetFileList()
833
    file_names.append(constants.SSL_CERT_FILE)
834
835
    file_names.extend(master_files)

Iustin Pop's avatar
Iustin Pop committed
836
837
838
    local_checksums = utils.FingerprintFiles(file_names)

    feedback_fn("* Gathering data (%d nodes)" % len(nodelist))
Iustin Pop's avatar
Iustin Pop committed
839
840
841
    all_volumeinfo = self.rpc.call_volume_list(nodelist, vg_name)
    all_instanceinfo = self.rpc.call_instance_list(nodelist, hypervisors)
    all_vglist = self.rpc.call_vg_list(nodelist)
Iustin Pop's avatar
Iustin Pop committed
842
843
844
    node_verify_param = {
      'filelist': file_names,
      'nodelist': nodelist,
845
      'hypervisor': hypervisors,
846
847
      'node-net-test': [(node.name, node.primary_ip, node.secondary_ip)
                        for node in nodeinfo]
Iustin Pop's avatar
Iustin Pop committed
848
      }
Iustin Pop's avatar
Iustin Pop committed
849
850
851
852
853
    all_nvinfo = self.rpc.call_node_verify(nodelist, node_verify_param,
                                           self.cfg.GetClusterName())
    all_rversion = self.rpc.call_version(nodelist)
    all_ninfo = self.rpc.call_node_info(nodelist, self.cfg.GetVGName(),
                                        self.cfg.GetHypervisorType())
Iustin Pop's avatar
Iustin Pop committed
854

855
    cluster = self.cfg.GetClusterInfo()
856
857
858
859
860
861
862
863
864
865
866
    master_node = self.cfg.GetMasterNode()
    for node_i in nodeinfo:
      node = node_i.name
      if node == master_node:
        ntype="master"
      elif node_i.master_candidate:
        ntype="master candidate"
      else:
        ntype="regular"
      feedback_fn("* Verifying node %s (%s)" % (node, ntype))
      result = self._VerifyNode(node_i, file_names, local_checksums,
Iustin Pop's avatar
Iustin Pop committed
867
                                all_vglist[node], all_nvinfo[node],
868
                                all_rversion[node], feedback_fn, master_files)
Iustin Pop's avatar
Iustin Pop committed
869
870
871
872
873
      bad = bad or result

      # node_volume
      volumeinfo = all_volumeinfo[node]

874
875
876
877
878
879
      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
880
881
882
        feedback_fn("  - ERROR: connection to %s failed" % (node,))
        bad = True
        continue
883
884
      else:
        node_volume[node] = volumeinfo
Iustin Pop's avatar
Iustin Pop committed
885
886
887
888
889
890
891
892
893
894

      # 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

895
896
897
898
899
900
901
902
903
904
905
      # 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']),
906
907
          "pinst": [],
          "sinst": [],
908
909
910
911
912
913
914
          # 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": {},
915
916
917
918
919
920
        }
      except ValueError:
        feedback_fn("  - ERROR: invalid value returned from node %s" % (node,))
        bad = True
        continue

Iustin Pop's avatar
Iustin Pop committed
921
922
923
924
925
    node_vol_should = {}

    for instance in instancelist:
      feedback_fn("* Verifying instance %s" % instance)
      inst_config = self.cfg.GetInstanceInfo(instance)
926
927
928
      result =  self._VerifyInstance(instance, inst_config, node_volume,
                                     node_instance, feedback_fn)
      bad = bad or result
Iustin Pop's avatar
Iustin Pop committed
929
930
931

      inst_config.MapLVsByNode(node_vol_should)

Guido Trotter's avatar
Guido Trotter committed
932
933
      instance_cfg[instance] = inst_config

934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
      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)

953
      if not cluster.FillBE(inst_config)[constants.BE_AUTO_BALANCE]:
954
955
        i_non_a_balanced.append(instance)

956
957
958
      for snode in inst_config.secondary_nodes:
        if snode in node_info:
          node_info[snode]['sinst'].append(instance)
959
960
961
          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)
962
963
964
965
        else:
          feedback_fn("  - ERROR: instance %s, connection to secondary node"
                      " %s failed" % (instance, snode))

Iustin Pop's avatar
Iustin Pop committed
966
967
968
969
970
971
972
973
974
975
    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

976
977
978
979
    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
980
981
982
983
984
985

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

986
987
988
989
    if i_non_a_balanced:
      feedback_fn("  - NOTICE: %d non-auto-balanced instance(s) found."
                  % len(i_non_a_balanced))

990
    return not bad
Iustin Pop's avatar
Iustin Pop committed
991

Guido Trotter's avatar
Guido Trotter committed
992
  def HooksCallBack(self, phase, hooks_results, feedback_fn, lu_result):
993
994
995
    """Analize the post-hooks' result

    This method analyses the hook result, handles it, and sends some
Guido Trotter's avatar
Guido Trotter committed
996
997
    nicely-formatted feedback back to the user.

998
999
1000
1001
1002
1003
1004
    @param phase: one of L{constants.HOOKS_PHASE_POST} or
        L{constants.HOOKS_PHASE_PRE}; it denotes the hooks phase
    @param hooks_results: the results of the multi-node hooks rpc call
    @param feedback_fn: function used send feedback back to the caller
    @param lu_result: previous Exec result
    @return: the new Exec result, based on the previous result
        and hook results
Guido Trotter's avatar
Guido Trotter committed
1005
1006

    """
Iustin Pop's avatar
Iustin Pop committed
1007
1008
    # We only really run POST phase hooks, and are only interested in
    # their results
Guido Trotter's avatar
Guido Trotter committed
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
    if phase == constants.HOOKS_PHASE_POST:
      # Used to change hooks' output to proper indentation
      indent_re = re.compile('^', re.M)
      feedback_fn("* Hooks Results")
      if not hooks_results:
        feedback_fn("  - ERROR: general communication failure")
        lu_result = 1
      else:
        for node_name in hooks_results:
          show_node_header = True
          res = hooks_results[node_name]
          if res is False or not isinstance(res, list):
            feedback_fn("    Communication failure")
            lu_result = 1
            continue
          for script, hkr, output in res:
            if hkr == constants.HKR_FAIL:
              # The node header is only shown once, if there are
              # failing hooks on that node
              if show_node_header:
                feedback_fn("  Node %s:" % node_name)
                show_node_header = False
              feedback_fn("    ERROR: Script %s failed, output:" % script)
              output = indent_re.sub('      ', output)
              feedback_fn("%s" % output)
              lu_result = 1

      return lu_result

Iustin Pop's avatar
Iustin Pop committed
1038

Iustin Pop's avatar
Iustin Pop committed
1039
1040
1041
1042
1043
class LUVerifyDisks(NoHooksLU):
  """Verifies the cluster disks status.

  """
  _OP_REQP = []
1044
1045
1046
1047
1048
1049
1050
1051
  REQ_BGL = False

  def ExpandNames(self):
    self.needed_locks = {
      locking.LEVEL_NODE: locking.ALL_SET,
      locking.LEVEL_INSTANCE: locking.ALL_SET,
    }
    self.share_locks = dict(((i, 1) for i in locking.LEVELS))
Iustin Pop's avatar
Iustin Pop committed
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064

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

    This has no prerequisites.

    """
    pass

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

    """
1065
    result = res_nodes, res_nlvm, res_instances, res_missing = [], {}, [], {}
Iustin Pop's avatar
Iustin Pop committed
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086

    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

Iustin Pop's avatar
Iustin Pop committed
1087
    node_lvs = self.rpc.call_volume_list(nodes, vg_name)
Iustin Pop's avatar
Iustin Pop committed
1088
1089
1090
1091
1092

    to_act = set()
    for node in nodes:
      # node_volume
      lvs = node_lvs[node]
1093
1094
1095
1096
1097
      if lvs.failed:
        self.LogWarning("Connection to node %s failed: %s" %
                        (node, lvs.data))
        continue
      lvs = lvs.data
1098
      if isinstance(lvs, basestring):
1099
        logging.warning("Error enumerating LVs on node %s: %s", node, lvs)
1100
1101
        res_nlvm[node] = lvs
      elif not isinstance(lvs, dict):
1102
1103
        logging.warning("Connection to node %s failed or invalid data"
                        " returned", node)
Iustin Pop's avatar
Iustin Pop committed
1104
1105
1106
1107
        res_nodes.append(node)
        continue

      for lv_name, (_, lv_inactive, lv_online) in lvs.iteritems():
1108
1109
1110
        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
1111
          res_instances.append(inst.name)
Iustin Pop's avatar
Iustin Pop committed
1112

1113
1114
1115
1116
1117
1118
1119
    # 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
1120
1121
1122
    return result


1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
class LURenameCluster(LogicalUnit):
  """Rename the cluster.

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

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

    """
    env = {
Michael Hanselmann's avatar
Michael Hanselmann committed
1136
      "OP_TARGET": self.cfg.GetClusterName(),
1137
1138
      "NEW_NAME": self.op.name,
      }
Michael Hanselmann's avatar
Michael Hanselmann committed
1139
    mn = self.cfg.GetMasterNode()
1140
1141
1142
1143
1144
1145
    return env, [mn], [mn]

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

    """
1146
    hostname = utils.HostInfo(self.op.name)
1147

1148
1149
    new_name = hostname.name
    self.ip = new_ip = hostname.ip
Michael Hanselmann's avatar
Michael Hanselmann committed
1150
1151
    old_name = self.cfg.GetClusterName()
    old_ip = self.cfg.GetMasterIP()
1152
1153
1154
1155
    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:
1156
      if utils.TcpPing(new_ip, constants.DEFAULT_NODED_PORT):
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
        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

    # shutdown the master IP
Michael Hanselmann's avatar
Michael Hanselmann committed
1171
    master = self.cfg.GetMasterNode()
1172
1173
    result = self.rpc.call_node_stop_master(master, False)
    if result.failed or not result.data:
1174
1175
1176
      raise errors.OpExecError("Could not disable the master role")

    try:
Iustin Pop's avatar
Iustin Pop committed
1177
1178
1179
1180
      cluster = self.cfg.GetClusterInfo()
      cluster.cluster_name = clustername
      cluster.master_ip = ip
      self.cfg.Update(cluster)
1181
    finally:
1182
1183
      result = self.rpc.call_node_start_master(master, False)
      if result.failed or not result.data:
1184
1185
        self.LogWarning("Could not re-enable the master role on"
                        " the master, please restart manually.")
1186
1187


1188
1189
1190
def _RecursiveCheckIfLVMBased(disk):
  """Check if the given disk or its children are lvm-based.

1191
1192
1193
1194
  @type disk: L{objects.Disk}
  @param disk: the disk to check
  @rtype: booleean
  @return: boolean indicating whether a LD_LV dev_type was found or not
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210

  """
  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 = []
1211
1212
  REQ_BGL = False

1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
  def CheckParameters(self):
    """Check parameters

    """
    if not hasattr(self.op, "candidate_pool_size"):
      self.op.candidate_pool_size = None
    if self.op.candidate_pool_size is not None:
      try:
        self.op.candidate_pool_size = int(self.op.candidate_pool_size)
      except ValueError, err:
        raise errors.OpPrereqError("Invalid candidate_pool_size value: %s" %
                                   str(err))
      if self.op.candidate_pool_size < 1:
        raise errors.OpPrereqError("At least one master candidate needed")

1228
1229
1230
1231
1232
1233
1234
  def ExpandNames(self):
    # FIXME: in the future maybe other cluster params won't require checking on
    # all nodes to be modified.
    self.needed_locks = {
      locking.LEVEL_NODE: locking.ALL_SET,
    }
    self.share_locks[locking.LEVEL_NODE] = 1
1235
1236
1237
1238
1239
1240

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

    """
    env = {
Michael Hanselmann's avatar
Michael Hanselmann committed
1241
      "OP_TARGET": self.cfg.GetClusterName(),
1242
1243
      "NEW_VG_NAME": self.op.vg_name,
      }
Michael Hanselmann's avatar
Michael Hanselmann committed
1244
    mn = self.cfg.GetMasterNode()
1245
1246
1247
1248
1249
1250
    return env, [mn], [mn]

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

    This checks whether the given params don't conflict and
1251
    if the given volume group is valid.
1252
1253

    """
1254
1255
    # FIXME: This only works because there is only one parameter that can be
    # changed or removed.
1256
    if self.op.vg_name is not None and not self.op.vg_name:
1257
      instances = self.cfg.GetAllInstancesInfo().values()
1258
1259
1260
1261
1262
1263
      for inst in instances:
        for disk in inst.disks:
          if _RecursiveCheckIfLVMBased(disk):
            raise errors.OpPrereqError("Cannot disable lvm storage while"
                                       " lvm-based instances exist")

1264
1265
    node_list = self.acquired_locks[locking.LEVEL_NODE]

1266
1267
    # if vg_name not None, checks given volume group on all nodes
    if self.op.vg_name:
Iustin Pop's avatar
Iustin Pop committed
1268
      vglist = self.rpc.call_vg_list(node_list)
1269
      for node in node_list:
1270
1271
1272
1273
1274
1275
        if vglist[node].failed:
          # ignoring down node
          self.LogWarning("Node %s unreachable/error, ignoring" % node)
          continue
        vgstatus = utils.CheckVolumeGroupSize(vglist[node].data,
                                              self.op.vg_name,
1276
                                              constants.MIN_VG_SIZE)
1277
1278
1279
1280
        if vgstatus:
          raise errors.OpPrereqError("Error on node '%s': %s" %
                                     (node, vgstatus))

1281
    self.cluster = cluster = self.cfg.GetClusterInfo()
1282
    # validate beparams changes
1283
    if self.op.beparams:
1284
      utils.CheckBEParams(self.op.beparams)
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
      self.new_beparams = cluster.FillDict(
        cluster.beparams[constants.BEGR_DEFAULT], self.op.beparams)

    # hypervisor list/parameters
    self.new_hvparams = cluster.FillDict(cluster.hvparams, {})
    if self.op.hvparams:
      if not isinstance(self.op.hvparams, dict):
        raise errors.OpPrereqError("Invalid 'hvparams' parameter on input")
      for hv_name, hv_dict in self.op.hvparams.items():
        if hv_name not in self.new_hvparams:
          self.new_hvparams[hv_name] = hv_dict
        else:
          self.new_hvparams[hv_name].update(hv_dict)

    if self.op.enabled_hypervisors is not None:
      self.hv_list = self.op.enabled_hypervisors
    else:
      self.hv_list = cluster.enabled_hypervisors

    if self.op.hvparams or self.op.enabled_hypervisors is not None:
      # either the enabled list has changed, or the parameters have, validate
      for hv_name, hv_params in self.new_hvparams.items():
        if ((self.op.hvparams and hv_name in self.op.hvparams) or
            (self.op.enabled_hypervisors and
             hv_name in self.op.enabled_hypervisors)):
          # either this is a new hypervisor, or its parameters have changed
          hv_class = hypervisor.GetHypervisor(hv_name)
          hv_class.CheckParameterSyntax(hv_params)
          _CheckHVParams(self, node_list, hv_name, hv_params)

1315
1316
1317
1318
  def Exec(self, feedback_fn):
    """Change the parameters of the cluster.

    """
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
    if self.op.vg_name is not None:
      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")
    if self.op.hvparams:
      self.cluster.hvparams = self.new_hvparams
    if self.op.enabled_hypervisors is not None:
      self.cluster.enabled_hypervisors = self.op.enabled_hypervisors
    if self.op.beparams:
      self.cluster.beparams[constants.BEGR_DEFAULT] = self.new_beparams
1331
1332
1333
    if self.op.candidate_pool_size is not None:
      self.cluster.candidate_pool_size = self.op.candidate_pool_size

1334
    self.cfg.Update(self.cluster)
1335

1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
    # we want to update nodes after the cluster so that if any errors
    # happen, we have recorded and saved the cluster info
    if self.op.candidate_pool_size is not None:
      node_info = self.cfg.GetAllNodesInfo().values()
      num_candidates = len([node for node in node_info
                            if node.master_candidate])
      num_nodes = len(node_info)
      if num_candidates < self.op.candidate_pool_size:
        random.shuffle(node_info)
        for node in node_info:
          if num_candidates >= self.op.candidate_pool_size:
            break
          if node.master_candidate:
            continue
          node.master_candidate = True
          self.LogInfo("Promoting node %s to master candidate", node.name)
          self.cfg.Update(node)
          self.context.ReaddNode(node)
          num_candidates += 1
      elif num_candidates > self.op.candidate_pool_size:
        self.LogInfo("Note: more nodes are candidates (%d) than the new value"
                     " of candidate_pool_size (%d)" %
                     (num_candidates, self.op.candidate_pool_size))

1360

1361
def _WaitForSync(lu, instance, oneshot=False, unlock=False):
Iustin Pop's avatar
Iustin Pop committed
1362
1363
1364
1365
1366
1367
1368
  """Sleep and poll for an instance's disk to sync.

  """
  if not instance.disks:
    return True

  if not oneshot:
1369
    lu.proc.LogInfo("Waiting for instance %s to sync disks." % instance.name)
Iustin Pop's avatar
Iustin Pop committed
1370
1371
1372
1373

  node = instance.primary_node

  for dev in instance.disks:
1374
    lu.cfg.SetDiskID(dev, node)
Iustin Pop's avatar
Iustin Pop committed
1375
1376
1377
1378
1379
1380

  retries = 0
  while True:
    max_time = 0
    done = True
    cumul_degraded = False
Iustin Pop's avatar
Iustin Pop committed
1381
    rstats = lu.rpc.call_blockdev_getmirrorstatus(node, instance.disks)
1382
    if rstats.failed or not rstats.data:
1383
      lu.LogWarning("Can't get any data from node %s", node)
Iustin Pop's avatar
Iustin Pop committed
1384
1385
      retries += 1
      if retries >= 10:
1386
1387