cmdlib.py 260 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

# pylint: disable-msg=W0613,W0201

import os
import os.path
import time
import re
import platform
31
import logging
32
import copy
Iustin Pop's avatar
Iustin Pop committed
33
34
35
36
37

from ganeti import ssh
from ganeti import utils
from ganeti import errors
from ganeti import hypervisor
Guido Trotter's avatar
Guido Trotter committed
38
from ganeti import locking
Iustin Pop's avatar
Iustin Pop committed
39
40
from ganeti import constants
from ganeti import objects
41
from ganeti import serializer
42
from ganeti import ssconf
43
44


Iustin Pop's avatar
Iustin Pop committed
45
class LogicalUnit(object):
46
  """Logical Unit base class.
Iustin Pop's avatar
Iustin Pop committed
47
48

  Subclasses must follow these rules:
49
    - implement ExpandNames
50
51
    - implement CheckPrereq (except when tasklets are used)
    - implement Exec (except when tasklets are used)
Iustin Pop's avatar
Iustin Pop committed
52
53
    - implement BuildHooksEnv
    - redefine HPATH and HTYPE
54
    - optionally redefine their run requirements:
55
        REQ_BGL: the LU needs to hold the Big Ganeti Lock exclusively
56
57

  Note that all commands require root permissions.
Iustin Pop's avatar
Iustin Pop committed
58

59
60
61
  @ivar dry_run_result: the value (if any) that will be returned to the caller
      in dry-run mode (signalled by opcode dry_run parameter)

Iustin Pop's avatar
Iustin Pop committed
62
63
64
65
  """
  HPATH = None
  HTYPE = None
  _OP_REQP = []
66
  REQ_BGL = True
Iustin Pop's avatar
Iustin Pop committed
67

Iustin Pop's avatar
Iustin Pop committed
68
  def __init__(self, processor, op, context, rpc):
Iustin Pop's avatar
Iustin Pop committed
69
70
    """Constructor for LogicalUnit.

Michael Hanselmann's avatar
Michael Hanselmann committed
71
    This needs to be overridden in derived classes in order to check op
Iustin Pop's avatar
Iustin Pop committed
72
73
74
    validity.

    """
Iustin Pop's avatar
Iustin Pop committed
75
    self.proc = processor
Iustin Pop's avatar
Iustin Pop committed
76
    self.op = op
Guido Trotter's avatar
Guido Trotter committed
77
78
    self.cfg = context.cfg
    self.context = context
Iustin Pop's avatar
Iustin Pop committed
79
    self.rpc = rpc
80
    # Dicts used to declare locking needs to mcpu
81
    self.needed_locks = None
82
    self.acquired_locks = {}
83
    self.share_locks = dict.fromkeys(locking.LEVELS, 0)
84
85
    self.add_locks = {}
    self.remove_locks = {}
86
87
    # Used to force good behavior when calling helper functions
    self.recalculate_locks = {}
88
    self.__ssh = None
89
90
91
    # logging
    self.LogWarning = processor.LogWarning
    self.LogInfo = processor.LogInfo
92
    self.LogStep = processor.LogStep
93
94
    # support for dry-run
    self.dry_run_result = None
95

96
97
98
    # Tasklets
    self.tasklets = []

Iustin Pop's avatar
Iustin Pop committed
99
100
101
    for attr_name in self._OP_REQP:
      attr_val = getattr(op, attr_name, None)
      if attr_val is None:
102
103
        raise errors.OpPrereqError("Required parameter '%s' missing" %
                                   attr_name)
104

105
    self.CheckArguments()
Iustin Pop's avatar
Iustin Pop committed
106

107
108
109
110
111
  def __GetSSH(self):
    """Returns the SshRunner object

    """
    if not self.__ssh:
112
      self.__ssh = ssh.SshRunner(self.cfg.GetClusterName())
113
114
115
116
    return self.__ssh

  ssh = property(fget=__GetSSH)

117
118
119
120
121
122
123
124
125
  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
Michael Hanselmann's avatar
Michael Hanselmann committed
126
      - CheckPrereq is run after we have acquired locks (and possible
127
128
129
130
131
132
133
134
        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

135
136
137
138
139
140
141
142
143
144
145
  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:
146
147
148
149
150

      - 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
151

Guido Trotter's avatar
Guido Trotter committed
152
153
154
155
    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.

156
157
158
159
    This function can also define a list of tasklets, which then will be
    executed in order instead of the usual LU-level CheckPrereq and Exec
    functions, if those are not defined by the LU.

160
161
162
163
164
165
166
167
168
169
170
171
172
    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
173
174
175
176
177
178
179
180
181
182

    """
    # 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
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
  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
201
202
203
204
205
206
207
208
209
210
211
212
  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
213
    their canonical form if it hasn't been done by ExpandNames before.
Iustin Pop's avatar
Iustin Pop committed
214
215

    """
216
217
218
219
220
    if self.tasklets:
      for tl in self.tasklets:
        tl.CheckPrereq()
    else:
      raise NotImplementedError
Iustin Pop's avatar
Iustin Pop committed
221
222
223
224
225
226
227
228
229

  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.

    """
230
231
232
233
234
    if self.tasklets:
      for tl in self.tasklets:
        tl.Exec(feedback_fn)
    else:
      raise NotImplementedError
Iustin Pop's avatar
Iustin Pop committed
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249

  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.

250
    No nodes should be returned as an empty list (and not None).
Iustin Pop's avatar
Iustin Pop committed
251
252
253
254
255
256
257

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

    """
    raise NotImplementedError

258
259
260
261
262
263
264
265
266
  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.

267
268
269
270
271
272
273
274
    @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
275
276
277
278

    """
    return lu_result

279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
  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

301
  def _LockInstancesNodes(self, primary_only=False):
302
303
304
305
306
307
308
309
310
311
312
313
314
    """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.

315
    If should be called in DeclareLocks in a way similar to::
316

317
318
      if level == locking.LEVEL_NODE:
        self._LockInstancesNodes()
319

320
321
322
    @type primary_only: boolean
    @param primary_only: only lock primary nodes of locked instances

323
324
325
326
327
328
329
330
331
332
    """
    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 = []
333
    for instance_name in self.acquired_locks[locking.LEVEL_INSTANCE]:
334
335
      instance = self.context.cfg.GetInstanceInfo(instance_name)
      wanted_nodes.append(instance.primary_node)
336
337
      if not primary_only:
        wanted_nodes.extend(instance.secondary_nodes)
338
339
340
341
342

    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)
343
344
345

    del self.recalculate_locks[locking.LEVEL_NODE]

Iustin Pop's avatar
Iustin Pop committed
346
347
348
349
350
351
352
353
354
355
356
357

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


358
359
360
361
362
363
364
365
366
367
368
369
class Tasklet:
  """Tasklet base class.

  Tasklets are subcomponents for LUs. LUs can consist entirely of tasklets or
  they can mix legacy code with tasklets. Locking needs to be done in the LU,
  tasklets know nothing about locks.

  Subclasses must follow these rules:
    - Implement CheckPrereq
    - Implement Exec

  """
370
371
372
373
374
375
376
  def __init__(self, lu):
    self.lu = lu

    # Shortcuts
    self.cfg = lu.cfg
    self.rpc = lu.rpc

377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
  def CheckPrereq(self):
    """Check prerequisites for this tasklets.

    This method should check whether the prerequisites for the execution of
    this tasklet 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 parameters to their canonical form if it
    hasn't been done before.

    """
    raise NotImplementedError

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

    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


404
def _GetWantedNodes(lu, nodes):
405
  """Returns list of checked and expanded node names.
406

407
408
409
410
411
412
413
  @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
414
415

  """
416
  if not isinstance(nodes, list):
417
    raise errors.OpPrereqError("Invalid argument type 'nodes'")
418

419
420
421
  if not nodes:
    raise errors.ProgrammerError("_GetWantedNodes should only be called with a"
      " non-empty list of nodes whose name is to be expanded.")
422

423
424
425
426
427
428
  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)
429

430
  return utils.NiceSort(wanted)
431
432
433


def _GetWantedInstances(lu, instances):
434
  """Returns list of checked and expanded instance names.
435

436
437
438
439
440
441
442
443
  @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
444
445
446
447
448
449
450
451
452

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

  if instances:
    wanted = []

    for name in instances:
453
      instance = lu.cfg.ExpandInstanceName(name)
454
455
456
457
458
      if instance is None:
        raise errors.OpPrereqError("No such instance name '%s'" % name)
      wanted.append(instance)

  else:
459
460
    wanted = utils.NiceSort(lu.cfg.GetInstanceList())
  return wanted
461
462
463


def _CheckOutputFields(static, dynamic, selected):
464
465
  """Checks whether all selected fields are valid.

Iustin Pop's avatar
Iustin Pop committed
466
  @type static: L{utils.FieldSet}
Iustin Pop's avatar
Iustin Pop committed
467
  @param static: static fields set
Iustin Pop's avatar
Iustin Pop committed
468
  @type dynamic: L{utils.FieldSet}
Iustin Pop's avatar
Iustin Pop committed
469
  @param dynamic: dynamic fields set
470
471

  """
Iustin Pop's avatar
Iustin Pop committed
472
  f = utils.FieldSet()
Iustin Pop's avatar
Iustin Pop committed
473
474
  f.Extend(static)
  f.Extend(dynamic)
475

Iustin Pop's avatar
Iustin Pop committed
476
477
  delta = f.NonMatching(selected)
  if delta:
478
    raise errors.OpPrereqError("Unknown output fields selected: %s"
Iustin Pop's avatar
Iustin Pop committed
479
                               % ",".join(delta))
480
481


482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
def _CheckBooleanOpField(op, name):
  """Validates boolean opcode parameters.

  This will ensure that an opcode parameter is either a boolean value,
  or None (but that it always exists).

  """
  val = getattr(op, name, None)
  if not (val is None or isinstance(val, bool)):
    raise errors.OpPrereqError("Invalid boolean parameter '%s' (%s)" %
                               (name, str(val)))
  setattr(op, name, val)


def _CheckNodeOnline(lu, node):
  """Ensure that a given node is online.

  @param lu: the LU on behalf of which we make the check
  @param node: the node to check
501
  @raise errors.OpPrereqError: if the node is offline
502
503
504
505
506
507

  """
  if lu.cfg.GetNodeInfo(node).offline:
    raise errors.OpPrereqError("Can't use offline node %s" % node)


508
509
510
511
512
513
514
515
516
517
518
519
def _CheckNodeNotDrained(lu, node):
  """Ensure that a given node is not drained.

  @param lu: the LU on behalf of which we make the check
  @param node: the node to check
  @raise errors.OpPrereqError: if the node is drained

  """
  if lu.cfg.GetNodeInfo(node).drained:
    raise errors.OpPrereqError("Can't use drained node %s" % node)


520
def _BuildInstanceHookEnv(name, primary_node, secondary_nodes, os_type, status,
521
                          memory, vcpus, nics, disk_template, disks,
Michael Hanselmann's avatar
Michael Hanselmann committed
522
                          bep, hvp, hypervisor_name):
523
524
525
526
527
528
529
530
531
532
533
534
  """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
535
536
  @type status: boolean
  @param status: the should_run status of the instance
537
538
539
540
541
  @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
542
543
  @param nics: list of tuples (ip, mac, mode, link) representing
      the NICs the instance has
Iustin Pop's avatar
Iustin Pop committed
544
  @type disk_template: string
Michael Hanselmann's avatar
Michael Hanselmann committed
545
  @param disk_template: the disk template of the instance
Iustin Pop's avatar
Iustin Pop committed
546
547
  @type disks: list
  @param disks: the list of (size, mode) pairs
548
549
550
551
  @type bep: dict
  @param bep: the backend parameters for the instance
  @type hvp: dict
  @param hvp: the hypervisor parameters for the instance
Michael Hanselmann's avatar
Michael Hanselmann committed
552
553
  @type hypervisor_name: string
  @param hypervisor_name: the hypervisor for the instance
554
555
  @rtype: dict
  @return: the hook environment for this instance
556

557
  """
558
559
560
561
  if status:
    str_status = "up"
  else:
    str_status = "down"
562
  env = {
563
    "OP_TARGET": name,
564
565
566
    "INSTANCE_NAME": name,
    "INSTANCE_PRIMARY": primary_node,
    "INSTANCE_SECONDARIES": " ".join(secondary_nodes),
567
    "INSTANCE_OS_TYPE": os_type,
568
    "INSTANCE_STATUS": str_status,
569
570
    "INSTANCE_MEMORY": memory,
    "INSTANCE_VCPUS": vcpus,
Iustin Pop's avatar
Iustin Pop committed
571
    "INSTANCE_DISK_TEMPLATE": disk_template,
Michael Hanselmann's avatar
Michael Hanselmann committed
572
    "INSTANCE_HYPERVISOR": hypervisor_name,
573
574
575
576
  }

  if nics:
    nic_count = len(nics)
577
    for idx, (ip, mac, mode, link) in enumerate(nics):
578
579
580
      if ip is None:
        ip = ""
      env["INSTANCE_NIC%d_IP" % idx] = ip
Iustin Pop's avatar
Iustin Pop committed
581
      env["INSTANCE_NIC%d_MAC" % idx] = mac
582
583
584
585
      env["INSTANCE_NIC%d_MODE" % idx] = mode
      env["INSTANCE_NIC%d_LINK" % idx] = link
      if mode == constants.NIC_MODE_BRIDGED:
        env["INSTANCE_NIC%d_BRIDGE" % idx] = link
586
587
588
589
590
  else:
    nic_count = 0

  env["INSTANCE_NIC_COUNT"] = nic_count

Iustin Pop's avatar
Iustin Pop committed
591
592
593
594
595
596
597
598
599
600
  if disks:
    disk_count = len(disks)
    for idx, (size, mode) in enumerate(disks):
      env["INSTANCE_DISK%d_SIZE" % idx] = size
      env["INSTANCE_DISK%d_MODE" % idx] = mode
  else:
    disk_count = 0

  env["INSTANCE_DISK_COUNT"] = disk_count

601
602
603
604
  for source, kind in [(bep, "BE"), (hvp, "HV")]:
    for key, value in source.items():
      env["INSTANCE_%s_%s" % (kind, key)] = value

605
606
  return env

607
def _NICListToTuple(lu, nics):
608
609
  """Build a list of nic information tuples.

610
611
  This list is suitable to be passed to _BuildInstanceHookEnv or as a return
  value in LUQueryInstanceData.
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628

  @type lu:  L{LogicalUnit}
  @param lu: the logical unit on whose behalf we execute
  @type nics: list of L{objects.NIC}
  @param nics: list of nics to convert to hooks tuples

  """
  hooks_nics = []
  c_nicparams = lu.cfg.GetClusterInfo().nicparams[constants.PP_DEFAULT]
  for nic in nics:
    ip = nic.ip
    mac = nic.mac
    filled_params = objects.FillDict(c_nicparams, nic.nicparams)
    mode = filled_params[constants.NIC_MODE]
    link = filled_params[constants.NIC_LINK]
    hooks_nics.append((ip, mac, mode, link))
  return hooks_nics
629

Iustin Pop's avatar
Iustin Pop committed
630
def _BuildInstanceHookEnvByObject(lu, instance, override=None):
631
632
  """Builds instance related env variables for hooks from an object.

633
634
635
636
637
638
639
640
641
642
643
  @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

644
  """
645
646
647
  cluster = lu.cfg.GetClusterInfo()
  bep = cluster.FillBE(instance)
  hvp = cluster.FillHV(instance)
648
649
650
651
  args = {
    'name': instance.name,
    'primary_node': instance.primary_node,
    'secondary_nodes': instance.secondary_nodes,
652
    'os_type': instance.os,
653
    'status': instance.admin_up,
Iustin Pop's avatar
Iustin Pop committed
654
655
    'memory': bep[constants.BE_MEMORY],
    'vcpus': bep[constants.BE_VCPUS],
656
    'nics': _NICListToTuple(lu, instance.nics),
Iustin Pop's avatar
Iustin Pop committed
657
658
    'disk_template': instance.disk_template,
    'disks': [(disk.size, disk.mode) for disk in instance.disks],
659
660
    'bep': bep,
    'hvp': hvp,
661
    'hypervisor_name': instance.hypervisor,
662
663
664
665
666
667
  }
  if override:
    args.update(override)
  return _BuildInstanceHookEnv(**args)


668
669
670
671
672
673
674
def _AdjustCandidatePool(lu):
  """Adjust the candidate pool after node operations.

  """
  mod_list = lu.cfg.MaintainCandidatePool()
  if mod_list:
    lu.LogInfo("Promoted nodes to master candidate role: %s",
Iustin Pop's avatar
Iustin Pop committed
675
               ", ".join(node.name for node in mod_list))
676
677
678
679
680
681
682
683
    for name in mod_list:
      lu.context.ReaddNode(name)
  mc_now, mc_max = lu.cfg.GetMasterCandidateStats()
  if mc_now > mc_max:
    lu.LogInfo("Note: more nodes are candidates (%d) than desired (%d)" %
               (mc_now, mc_max))


684
685
686
687
688
689
690
691
692
693
694
695
def _CheckNicsBridgesExist(lu, target_nics, target_node,
                               profile=constants.PP_DEFAULT):
  """Check that the brigdes needed by a list of nics exist.

  """
  c_nicparams = lu.cfg.GetClusterInfo().nicparams[profile]
  paramslist = [objects.FillDict(c_nicparams, nic.nicparams)
                for nic in target_nics]
  brlist = [params[constants.NIC_LINK] for params in paramslist
            if params[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED]
  if brlist:
    result = lu.rpc.call_bridges_exist(target_node, brlist)
696
697
    result.Raise("Error checking bridges on destination node '%s'" %
                 target_node, prereq=True)
698
699
700


def _CheckInstanceBridgesExist(lu, instance, node=None):
701
702
703
  """Check that the brigdes needed by an instance exist.

  """
704
  if node is None:
Iustin Pop's avatar
Iustin Pop committed
705
    node = instance.primary_node
706
  _CheckNicsBridgesExist(lu, instance.nics, node)
707
708


709
710
711
712
713
714
715
716
717
718
719
720
721
def _GetNodeSecondaryInstances(cfg, node_name):
  """Returns secondary instances on a node.

  """
  instances = []

  for (_, inst) in cfg.GetAllInstancesInfo().iteritems():
    if node_name in inst.secondary_nodes:
      instances.append(inst)

  return instances


Iustin Pop's avatar
Iustin Pop committed
722
723
724
725
726
727
728
729
730
731
732
class LUDestroyCluster(NoHooksLU):
  """Logical unit for destroying the cluster.

  """
  _OP_REQP = []

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

    This checks whether the cluster is empty.

Michael Hanselmann's avatar
Michael Hanselmann committed
733
    Any errors are signaled by raising errors.OpPrereqError.
Iustin Pop's avatar
Iustin Pop committed
734
735

    """
Michael Hanselmann's avatar
Michael Hanselmann committed
736
    master = self.cfg.GetMasterNode()
Iustin Pop's avatar
Iustin Pop committed
737
738

    nodelist = self.cfg.GetNodeList()
739
    if len(nodelist) != 1 or nodelist[0] != master:
740
741
      raise errors.OpPrereqError("There are still %d node(s) in"
                                 " this cluster." % (len(nodelist) - 1))
742
743
    instancelist = self.cfg.GetInstanceList()
    if instancelist:
744
745
      raise errors.OpPrereqError("There are still %d instance(s) in"
                                 " this cluster." % len(instancelist))
Iustin Pop's avatar
Iustin Pop committed
746
747
748
749
750

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

    """
Michael Hanselmann's avatar
Michael Hanselmann committed
751
    master = self.cfg.GetMasterNode()
752
    result = self.rpc.call_node_stop_master(master, False)
753
    result.Raise("Could not disable the master role")
754
755
756
    priv_key, pub_key, _ = ssh.GetUserFiles(constants.GANETI_RUNAS)
    utils.CreateBackup(priv_key)
    utils.CreateBackup(pub_key)
Iustin Pop's avatar
Iustin Pop committed
757
    return master
Iustin Pop's avatar
Iustin Pop committed
758
759


Guido Trotter's avatar
Guido Trotter committed
760
class LUVerifyCluster(LogicalUnit):
Iustin Pop's avatar
Iustin Pop committed
761
762
763
  """Verifies the cluster status.

  """
Guido Trotter's avatar
Guido Trotter committed
764
765
  HPATH = "cluster-verify"
  HTYPE = constants.HTYPE_CLUSTER
766
  _OP_REQP = ["skip_checks"]
767
768
769
770
771
772
773
  REQ_BGL = False

  def ExpandNames(self):
    self.needed_locks = {
      locking.LEVEL_NODE: locking.ALL_SET,
      locking.LEVEL_INSTANCE: locking.ALL_SET,
    }
774
    self.share_locks = dict.fromkeys(locking.LEVELS, 1)
Iustin Pop's avatar
Iustin Pop committed
775

776
  def _VerifyNode(self, nodeinfo, file_list, local_cksum,
777
                  node_result, feedback_fn, master_files,
778
                  drbd_map, vg_name):
Iustin Pop's avatar
Iustin Pop committed
779
780
    """Run multiple tests against a node.

781
    Test list:
782

Iustin Pop's avatar
Iustin Pop committed
783
      - compares ganeti version
Michael Hanselmann's avatar
Michael Hanselmann committed
784
      - checks vg existence and size > 20G
Iustin Pop's avatar
Iustin Pop committed
785
786
787
      - checks config file checksum
      - checks ssh to other nodes

788
789
    @type nodeinfo: L{objects.Node}
    @param nodeinfo: the node to check
790
791
792
793
    @param file_list: required list of files
    @param local_cksum: dictionary of local files and their checksums
    @param node_result: the results from the node
    @param feedback_fn: function used to accumulate results
794
    @param master_files: list of files that only masters should have
795
796
797
    @param drbd_map: the useddrbd minors for this node, in
        form of minor: (instance, must_exist) which correspond to instances
        and their running status
798
    @param vg_name: Ganeti Volume Group (result of self.cfg.GetVGName())
799

Iustin Pop's avatar
Iustin Pop committed
800
    """
801
    node = nodeinfo.name
802
803
804
805
806
807

    # main result, node_result should be a non-empty dict
    if not node_result or not isinstance(node_result, dict):
      feedback_fn("  - ERROR: unable to verify node %s." % (node,))
      return True

Iustin Pop's avatar
Iustin Pop committed
808
809
    # compares ganeti version
    local_version = constants.PROTOCOL_VERSION
810
    remote_version = node_result.get('version', None)
811
812
    if not (remote_version and isinstance(remote_version, (list, tuple)) and
            len(remote_version) == 2):
813
      feedback_fn("  - ERROR: connection to %s failed" % (node))
Iustin Pop's avatar
Iustin Pop committed
814
815
      return True

816
817
818
    if local_version != remote_version[0]:
      feedback_fn("  - ERROR: incompatible protocol versions: master %s,"
                  " node %s %s" % (local_version, node, remote_version[0]))
Iustin Pop's avatar
Iustin Pop committed
819
820
      return True

821
    # node seems compatible, we can actually try to look into its results
Iustin Pop's avatar
Iustin Pop committed
822
823

    bad = False
824
825
826
827
828
829
830
831

    # full package version
    if constants.RELEASE_VERSION != remote_version[1]:
      feedback_fn("  - WARNING: software version mismatch: master %s,"
                  " node %s %s" %
                  (constants.RELEASE_VERSION, node, remote_version[1]))

    # checks vg existence and size > 20G
832
833
834
835
836
    if vg_name is not None:
      vglist = node_result.get(constants.NV_VGLIST, None)
      if not vglist:
        feedback_fn("  - ERROR: unable to check volume groups on node %s." %
                        (node,))
Iustin Pop's avatar
Iustin Pop committed
837
        bad = True
838
839
840
841
842
843
      else:
        vgstatus = utils.CheckVolumeGroupSize(vglist, vg_name,
                                              constants.MIN_VG_SIZE)
        if vgstatus:
          feedback_fn("  - ERROR: %s on node %s" % (vgstatus, node))
          bad = True
Iustin Pop's avatar
Iustin Pop committed
844
845
846

    # checks config file checksum

847
848
    remote_cksum = node_result.get(constants.NV_FILELIST, None)
    if not isinstance(remote_cksum, dict):
Iustin Pop's avatar
Iustin Pop committed
849
850
851
852
      bad = True
      feedback_fn("  - ERROR: node hasn't returned file checksum data")
    else:
      for file_name in file_list:
853
854
        node_is_mc = nodeinfo.master_candidate
        must_have_file = file_name not in master_files
Iustin Pop's avatar
Iustin Pop committed
855
        if file_name not in remote_cksum:
856
857
858
          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
859
        elif remote_cksum[file_name] != local_cksum[file_name]:
860
861
862
863
864
865
          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
866
867
            feedback_fn("  - ERROR: file '%s' should not exist on non master"
                        " candidates (and the file is outdated)" % file_name)
868
869
870
871
872
        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
873

874
875
876
    # checks ssh to any

    if constants.NV_NODELIST not in node_result:
Iustin Pop's avatar
Iustin Pop committed
877
      bad = True
878
      feedback_fn("  - ERROR: node hasn't returned node ssh connectivity data")
Iustin Pop's avatar
Iustin Pop committed
879
    else:
880
      if node_result[constants.NV_NODELIST]:
Iustin Pop's avatar
Iustin Pop committed
881
        bad = True
882
        for node in node_result[constants.NV_NODELIST]:
883
          feedback_fn("  - ERROR: ssh communication with node '%s': %s" %
884
885
886
                          (node, node_result[constants.NV_NODELIST][node]))

    if constants.NV_NODENETTEST not in node_result:
887
888
889
      bad = True
      feedback_fn("  - ERROR: node hasn't returned node tcp connectivity data")
    else:
890
      if node_result[constants.NV_NODENETTEST]:
891
        bad = True
892
        nlist = utils.NiceSort(node_result[constants.NV_NODENETTEST].keys())
893
894
        for node in nlist:
          feedback_fn("  - ERROR: tcp communication with node '%s': %s" %
895
                          (node, node_result[constants.NV_NODENETTEST][node]))
896

897
    hyp_result = node_result.get(constants.NV_HYPERVISOR, None)
898
899
900
901
902
    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))
903
904

    # check used drbd list
905
906
907
908
909
910
911
912
    if vg_name is not None:
      used_minors = node_result.get(constants.NV_DRBDLIST, [])
      if not isinstance(used_minors, (tuple, list)):
        feedback_fn("  - ERROR: cannot parse drbd status file: %s" %
                    str(used_minors))
      else:
        for minor, (iname, must_exist) in drbd_map.items():
          if minor not in used_minors and must_exist:
913
914
            feedback_fn("  - ERROR: drbd minor %d of instance %s is"
                        " not active" % (minor, iname))
915
916
917
            bad = True
        for minor in used_minors:
          if minor not in drbd_map:
918
919
            feedback_fn("  - ERROR: unallocated drbd minor %d is in use" %
                        minor)
920
            bad = True
921

Iustin Pop's avatar
Iustin Pop committed
922
923
    return bad

924
  def _VerifyInstance(self, instance, instanceconfig, node_vol_is,
925
                      node_instance, feedback_fn, n_offline):
Iustin Pop's avatar
Iustin Pop committed
926
927
928
929
930
931
932
933
934
935
936
937
938
939
    """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:
940
941
942
      if node in n_offline:
        # ignore missing volumes on offline nodes
        continue
Iustin Pop's avatar
Iustin Pop committed
943
944
945
946
947
948
      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

949
    if instanceconfig.admin_up:
950
951
952
      if ((node_current not in node_instance or
          not instance in node_instance[node_current]) and
          node_current not in n_offline):
Iustin Pop's avatar
Iustin Pop committed
953
954
955
956
957
958
959
960
961
962
963
        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

964
    return bad
Iustin Pop's avatar
Iustin Pop committed
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997

  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

998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
  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
1019
          bep = self.cfg.GetClusterInfo().FillBE(instance_cfg[instance])
1020
          if bep[constants.BE_AUTO_BALANCE]:
1021
            needed_mem += bep[constants.BE_MEMORY]
1022
        if nodeinfo['mfree'] < needed_mem:
Michael Hanselmann's avatar
Michael Hanselmann committed
1023
          feedback_fn("  - ERROR: not enough memory on node %s to accommodate"
1024
1025
1026
1027
                      " failovers should node %s fail" % (node, prinode))
          bad = True
    return bad

Iustin Pop's avatar
Iustin Pop committed
1028
1029
1030
  def CheckPrereq(self):
    """Check prerequisites.

1031
1032
    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
1033
1034

    """
1035
1036
1037
    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
1038

Guido Trotter's avatar
Guido Trotter committed
1039
1040
1041
  def BuildHooksEnv(self):
    """Build hooks env.

Michael Hanselmann's avatar
Michael Hanselmann committed
1042
    Cluster-Verify hooks just ran in the post phase and their failure makes
Guido Trotter's avatar
Guido Trotter committed
1043
1044
1045
1046
    the output be logged in the verify output and the verification to fail.

    """
    all_nodes = self.cfg.GetNodeList()
1047
1048
1049
1050
1051
1052
    env = {
      "CLUSTER_TAGS": " ".join(self.cfg.GetClusterInfo().GetTags())
      }
    for node in self.cfg.GetAllNodesInfo().values():
      env["NODE_TAGS_%s" % node.name] = " ".join(node.GetTags())

Guido Trotter's avatar
Guido Trotter committed
1053
1054
    return env, [], all_nodes

Iustin Pop's avatar
Iustin Pop committed
1055
1056
1057
1058
1059
1060
  def Exec(self, feedback_fn):
    """Verify integrity of cluster, performing various test on nodes.

    """
    bad = False
    feedback_fn("* Verifying global settings")
1061
1062
    for msg in self.cfg.VerifyConfig():
      feedback_fn("  - ERROR: %s" % msg)
Iustin Pop's avatar
Iustin Pop committed
1063
1064

    vg_name = self.cfg.GetVGName()
1065
    hypervisors = self.cfg.GetClusterInfo().enabled_hypervisors
Iustin Pop's avatar
Iustin Pop committed
1066
    nodelist = utils.NiceSort(self.cfg.GetNodeList())
1067
    nodeinfo = [self.cfg.GetNodeInfo(nname) for nname in nodelist]
Iustin Pop's avatar
Iustin Pop committed
1068
    instancelist = utils.NiceSort(self.cfg.GetInstanceList())
1069
1070
    instanceinfo = dict((iname, self.cfg.GetInstanceInfo(iname))
                        for iname in instancelist)
1071
    i_non_redundant = [] # Non redundant instances
1072
    i_non_a_balanced = [] # Non auto-balanced instances
1073
    n_offline = [] # List of offline nodes
1074
    n_drained = [] # List of nodes being drained
Iustin Pop's avatar
Iustin Pop committed
1075
1076
    node_volume = {}
    node_instance = {}
1077
    node_info = {}
Guido Trotter's avatar
Guido Trotter committed
1078
    instance_cfg = {}
Iustin Pop's avatar
Iustin Pop committed
1079
1080
1081

    # FIXME: verify OS list
    # do local checksums
1082
1083
1084
    master_files = [constants.CLUSTER_CONF_FILE]

    file_names = ssconf.SimpleStore().GetFileList()
1085
    file_names.append(constants.SSL_CERT_FILE)
1086
    file_names.append(constants.RAPI_CERT_FILE)
1087
1088
    file_names.extend(master_files)

Iustin Pop's avatar
Iustin Pop committed
1089
1090
1091
1092
    local_checksums = utils.FingerprintFiles(file_names)

    feedback_fn("* Gathering data (%d nodes)" % len(nodelist))
    node_verify_param = {
1093
      constants.NV_FILELIST: file_names,
1094
1095
      constants.NV_NODELIST: [node.name for node in nodeinfo
                              if not node.offline],
1096
1097
      constants.NV_HYPERVISOR: hypervisors,
      constants.NV_NODENETTEST: [(node.name, node.primary_ip,
1098
1099
                                  node.secondary_ip) for node in nodeinfo
                                 if not node.offline],
1100
1101
1102
      constants.NV_INSTANCELIST: hypervisors,
      constants.NV_VERSION: None,
      constants.NV_HVINFO: self.cfg.GetHypervisorType(),
Iustin Pop's avatar
Iustin Pop committed
1103
      }
1104
1105
1106
1107
    if vg_name is not None:
      node_verify_param[constants.NV_VGLIST] = None
      node_verify_param[constants.NV_LVLIST] = vg_name
      node_verify_param[constants.NV_DRBDLIST] = None
Iustin Pop's avatar
Iustin Pop committed
1108
1109
    all_nvinfo = self.rpc.call_node_verify(nodelist, node_verify_param,
                                           self.cfg.GetClusterName())
Iustin Pop's avatar
Iustin Pop committed
1110

1111
    cluster = self.cfg.GetClusterInfo()
1112
    master_node = self.cfg.GetMasterNode()
1113
1114
    all_drbd_map = self.cfg.ComputeDRBDMap()

1115
1116
    for node_i in nodeinfo:
      node = node_i.name
1117

1118
1119
1120
1121
1122
      if node_i.offline:
        feedback_fn("* Skipping offline node %s" % (node,))
        n_offline.append(node)
        continue

1123
      if node == master_node:
1124
        ntype = "master"
1125
      elif node_i.master_candidate:
1126
        ntype = "master candidate"
1127
1128
1129
      elif node_i.drained:
        ntype = "drained"
        n_drained.append(node)
1130
      else:
1131
        ntype = "regular"
1132
      feedback_fn("* Verifying node %s (%s)" % (node, ntype))
1133

1134
      msg = all_nvinfo[node].fail_msg
1135
1136
      if msg:
        feedback_fn("  - ERROR: while contacting node %s: %s" % (node, msg))
1137
1138
1139
        bad = True
        continue

1140
      nresult = all_nvinfo[node].payload
1141
1142
      node_drbd = {}
      for minor, instance in all_drbd_map[node].items():
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
        if instance not in instanceinfo:
          feedback_fn("  - ERROR: ghost instance '%s' in temporary DRBD map" %
                      instance)
          # ghost instance should not be running, but otherwise we
          # don't give double warnings (both ghost instance and
          # unallocated minor in use)
          node_drbd[minor] = (instance, False)
        else:
          instance = instanceinfo[instance]
          node_drbd[minor] = (instance.name, instance.admin_up)
1153
      result = self._VerifyNode(node_i, file_names, local_checksums,
1154
                                nresult, feedback_fn, master_files,
1155
                                node_drbd, vg_name)
Iustin Pop's avatar
Iustin Pop committed
1156
1157
      bad = bad or result

1158
      lvdata = nresult.get(constants.NV_LVLIST, "Missing LV data")
1159
1160
1161
      if vg_name is None:
        node_volume[node] = {}
      elif isinstance(lvdata, basestring):
1162
        feedback_fn("  - ERROR: LVM problem on node %s: %s" %
1163
                    (node, utils.SafeEncode(lvdata)))
1164
1165
        bad = True
        node_volume[node] = {}
1166
1167
      elif not isinstance(lvdata, dict):
        feedback_fn("  - ERROR: connection to %s failed (lvlist)" % (node,))
Iustin Pop's avatar
Iustin Pop committed
1168
1169
        bad = True
        continue
1170
      else:
1171
        node_volume[node] = lvdata
Iustin Pop's avatar
Iustin Pop committed
1172
1173

      # node_instance
1174
1175
1176
1177
      idata = nresult.get(constants.NV_INSTANCELIST, None)
      if not isinstance(idata, list):
        feedback_fn("  - ERROR: connection to %s failed (instancelist)" %
                    (node,))
Iustin Pop's avatar
Iustin Pop committed
1178
1179
1180
        bad = True
        continue

1181
      node_instance[node] = idata
Iustin Pop's avatar
Iustin Pop committed
1182

1183
      # node_info
1184
      nodeinfo = nresult.get(constants.NV_HVINFO, None)
1185
      if not isinstance(nodeinfo, dict):
1186
        feedback_fn("  - ERROR: connection to %s failed (hvinfo)" % (node,))
1187
1188
1189
1190
1191
1192
        bad = True
        continue

      try:
        node_info[node] = {
          "mfree": int(nodeinfo['memory_free']),
1193
1194
          "pinst": [],
          "sinst": [],
1195
1196
1197
1198
1199
1200
1201
          # 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": {},
1202
        }
1203
1204
        # FIXME: devise a free space model for file based instances as well
        if vg_name is not None:
1205
1206
1207
1208
1209
1210
1211
          if (constants.NV_VGLIST not in nresult or
              vg_name not in nresult[constants.NV_VGLIST]):
            feedback_fn("  - ERROR: node %s didn't return data for the"
                        " volume group '%s' - it is either missing or broken" %
                        (node, vg_name))
            bad = True
            continue
1212
          node_info[node]["dfree"] = int(nresult[constants.NV_VGLIST][vg_name])
1213
1214
1215
      except (ValueError, KeyError):
        feedback_fn("  - ERROR: invalid nodeinfo value returned"
                    " from node %s" % (node,))
1216
1217
1218
        bad = True
        continue

Iustin Pop's avatar
Iustin Pop committed
1219
1220
1221
1222
    node_vol_should = {}

    for instance in instancelist:
      feedback_fn("* Verifying instance %s" % instance)
1223
      inst_config = instanceinfo[instance]
1224
      result =  self._VerifyInstance(instance, inst_config, node_volume,
1225
                                     node_instance, feedback_fn, n_offline)
1226
      bad = bad or result
1227
      inst_nodes_offline = []
Iustin Pop's avatar
Iustin Pop committed
1228
1229
1230

      inst_config.MapLVsByNode(node_vol_should)

Guido Trotter's avatar
Guido Trotter committed
1231
1232
      instance_cfg[instance] = inst_config

1233
1234
1235
      pnode = inst_config.primary_node
      if pnode in node_info:
        node_info[pnode]['pinst'].append(instance)
1236
      elif pnode not in n_offline:
1237
1238
1239
1240
        feedback_fn("  - ERROR: instance %s, connection to primary node"
                    " %s failed" % (instance, pnode))
        bad = True

1241
1242
1243
      if pnode in n_offline:
        inst_nodes_offline.append(pnode)