cmdlib.py 251 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

# pylint: disable-msg=W0613,W0201

import os
import os.path
import time
import tempfile
import re
import platform
32
import logging
33
import copy
34
import random
Iustin Pop's avatar
Iustin Pop committed
35
36
37
38
39

from ganeti import ssh
from ganeti import utils
from ganeti import errors
from ganeti import hypervisor
Guido Trotter's avatar
Guido Trotter committed
40
from ganeti import locking
Iustin Pop's avatar
Iustin Pop committed
41
42
43
from ganeti import constants
from ganeti import objects
from ganeti import opcodes
44
from ganeti import serializer
45
from ganeti import ssconf
46
47


Iustin Pop's avatar
Iustin Pop committed
48
class LogicalUnit(object):
49
  """Logical Unit base class.
Iustin Pop's avatar
Iustin Pop committed
50
51

  Subclasses must follow these rules:
52
53
    - implement ExpandNames
    - implement CheckPrereq
Iustin Pop's avatar
Iustin Pop committed
54
55
56
    - implement Exec
    - implement BuildHooksEnv
    - redefine HPATH and HTYPE
57
    - optionally redefine their run requirements:
58
        REQ_BGL: the LU needs to hold the Big Ganeti Lock exclusively
59
60

  Note that all commands require root permissions.
Iustin Pop's avatar
Iustin Pop committed
61
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
71
72
73
74
    """Constructor for LogicalUnit.

    This needs to be overriden in derived classes in order to check op
    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 = {}
Guido Trotter's avatar
Guido Trotter committed
83
    self.share_locks = dict(((i, 0) for i in locking.LEVELS))
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

Iustin Pop's avatar
Iustin Pop committed
93
94
95
    for attr_name in self._OP_REQP:
      attr_val = getattr(op, attr_name, None)
      if attr_val is None:
96
97
        raise errors.OpPrereqError("Required parameter '%s' missing" %
                                   attr_name)
98
    self.CheckArguments()
Iustin Pop's avatar
Iustin Pop committed
99

100
101
102
103
104
  def __GetSSH(self):
    """Returns the SshRunner object

    """
    if not self.__ssh:
105
      self.__ssh = ssh.SshRunner(self.cfg.GetClusterName())
106
107
108
109
    return self.__ssh

  ssh = property(fget=__GetSSH)

110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
  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

128
129
130
131
132
133
134
135
136
137
138
  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:
139
140
141
142
143

      - 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
144

Guido Trotter's avatar
Guido Trotter committed
145
146
147
148
    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.

149
150
151
152
153
154
155
156
157
158
159
160
161
    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
162
163
164
165
166
167
168
169
170
171

    """
    # 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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
  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
190
191
192
193
194
195
196
197
198
199
200
201
  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
202
    their canonical form if it hasn't been done by ExpandNames before.
Iustin Pop's avatar
Iustin Pop committed
203
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

    """
    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.

231
    No nodes should be returned as an empty list (and not None).
Iustin Pop's avatar
Iustin Pop committed
232
233
234
235
236
237
238

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

    """
    raise NotImplementedError

239
240
241
242
243
244
245
246
247
  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.

248
249
250
251
252
253
254
255
    @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
256
257
258
259

    """
    return lu_result

260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
  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

282
  def _LockInstancesNodes(self, primary_only=False):
283
284
285
286
287
288
289
290
291
292
293
294
295
    """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.

296
    If should be called in DeclareLocks in a way similar to::
297

298
299
      if level == locking.LEVEL_NODE:
        self._LockInstancesNodes()
300

301
302
303
    @type primary_only: boolean
    @param primary_only: only lock primary nodes of locked instances

304
305
306
307
308
309
310
311
312
313
    """
    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 = []
314
    for instance_name in self.acquired_locks[locking.LEVEL_INSTANCE]:
315
316
      instance = self.context.cfg.GetInstanceInfo(instance_name)
      wanted_nodes.append(instance.primary_node)
317
318
      if not primary_only:
        wanted_nodes.extend(instance.secondary_nodes)
319
320
321
322
323

    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)
324
325
326

    del self.recalculate_locks[locking.LEVEL_NODE]

Iustin Pop's avatar
Iustin Pop committed
327
328
329
330
331
332
333
334
335
336
337
338

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


339
def _GetWantedNodes(lu, nodes):
340
  """Returns list of checked and expanded node names.
341

342
343
344
345
346
347
348
  @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
349
350

  """
351
  if not isinstance(nodes, list):
352
    raise errors.OpPrereqError("Invalid argument type 'nodes'")
353

354
355
356
  if not nodes:
    raise errors.ProgrammerError("_GetWantedNodes should only be called with a"
      " non-empty list of nodes whose name is to be expanded.")
357

358
359
360
361
362
363
  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)
364

365
  return utils.NiceSort(wanted)
366
367
368


def _GetWantedInstances(lu, instances):
369
  """Returns list of checked and expanded instance names.
370

371
372
373
374
375
376
377
378
  @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
379
380
381
382
383
384
385
386
387

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

  if instances:
    wanted = []

    for name in instances:
388
      instance = lu.cfg.ExpandInstanceName(name)
389
390
391
392
393
      if instance is None:
        raise errors.OpPrereqError("No such instance name '%s'" % name)
      wanted.append(instance)

  else:
394
395
    wanted = utils.NiceSort(lu.cfg.GetInstanceList())
  return wanted
396
397
398


def _CheckOutputFields(static, dynamic, selected):
399
400
  """Checks whether all selected fields are valid.

Iustin Pop's avatar
Iustin Pop committed
401
  @type static: L{utils.FieldSet}
Iustin Pop's avatar
Iustin Pop committed
402
  @param static: static fields set
Iustin Pop's avatar
Iustin Pop committed
403
  @type dynamic: L{utils.FieldSet}
Iustin Pop's avatar
Iustin Pop committed
404
  @param dynamic: dynamic fields set
405
406

  """
Iustin Pop's avatar
Iustin Pop committed
407
  f = utils.FieldSet()
Iustin Pop's avatar
Iustin Pop committed
408
409
  f.Extend(static)
  f.Extend(dynamic)
410

Iustin Pop's avatar
Iustin Pop committed
411
412
  delta = f.NonMatching(selected)
  if delta:
413
    raise errors.OpPrereqError("Unknown output fields selected: %s"
Iustin Pop's avatar
Iustin Pop committed
414
                               % ",".join(delta))
415
416


417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
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
436
  @raise errors.OpPrereqError: if the node is offline
437
438
439
440
441
442

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


443
444
445
446
447
448
449
450
451
452
453
454
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)


455
def _BuildInstanceHookEnv(name, primary_node, secondary_nodes, os_type, status,
Iustin Pop's avatar
Iustin Pop committed
456
                          memory, vcpus, nics, disk_template, disks):
457
458
459
460
461
462
463
464
465
466
467
468
  """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
469
470
  @type status: boolean
  @param status: the should_run status of the instance
471
472
473
474
475
476
477
  @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
Iustin Pop's avatar
Iustin Pop committed
478
479
480
481
  @type disk_template: string
  @param disk_template: the distk template of the instance
  @type disks: list
  @param disks: the list of (size, mode) pairs
482
483
  @rtype: dict
  @return: the hook environment for this instance
484

485
  """
486
487
488
489
  if status:
    str_status = "up"
  else:
    str_status = "down"
490
  env = {
491
    "OP_TARGET": name,
492
493
494
    "INSTANCE_NAME": name,
    "INSTANCE_PRIMARY": primary_node,
    "INSTANCE_SECONDARIES": " ".join(secondary_nodes),
495
    "INSTANCE_OS_TYPE": os_type,
496
    "INSTANCE_STATUS": str_status,
497
498
    "INSTANCE_MEMORY": memory,
    "INSTANCE_VCPUS": vcpus,
Iustin Pop's avatar
Iustin Pop committed
499
    "INSTANCE_DISK_TEMPLATE": disk_template,
500
501
502
503
  }

  if nics:
    nic_count = len(nics)
504
    for idx, (ip, mac, mode, link) in enumerate(nics):
505
506
507
      if ip is None:
        ip = ""
      env["INSTANCE_NIC%d_IP" % idx] = ip
Iustin Pop's avatar
Iustin Pop committed
508
      env["INSTANCE_NIC%d_MAC" % idx] = mac
509
510
511
512
      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
513
514
515
516
517
  else:
    nic_count = 0

  env["INSTANCE_NIC_COUNT"] = nic_count

Iustin Pop's avatar
Iustin Pop committed
518
519
520
521
522
523
524
525
526
527
  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

528
529
  return env

530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
def _PreBuildNICHooksList(lu, nics):
  """Build a list of nic information tuples.

  This list is suitable to be passed to _BuildInstanceHookEnv.

  @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
551

Iustin Pop's avatar
Iustin Pop committed
552
def _BuildInstanceHookEnvByObject(lu, instance, override=None):
553
554
  """Builds instance related env variables for hooks from an object.

555
556
557
558
559
560
561
562
563
564
565
  @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

566
  """
Iustin Pop's avatar
Iustin Pop committed
567
  bep = lu.cfg.GetClusterInfo().FillBE(instance)
568
569
570
571
  args = {
    'name': instance.name,
    'primary_node': instance.primary_node,
    'secondary_nodes': instance.secondary_nodes,
572
    'os_type': instance.os,
573
    'status': instance.admin_up,
Iustin Pop's avatar
Iustin Pop committed
574
575
    'memory': bep[constants.BE_MEMORY],
    'vcpus': bep[constants.BE_VCPUS],
576
    'nics': _PreBuildNICHooksList(lu, instance.nics),
Iustin Pop's avatar
Iustin Pop committed
577
578
    'disk_template': instance.disk_template,
    'disks': [(disk.size, disk.mode) for disk in instance.disks],
579
580
581
582
583
584
  }
  if override:
    args.update(override)
  return _BuildInstanceHookEnv(**args)


585
586
587
588
589
590
591
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
592
               ", ".join(node.name for node in mod_list))
593
594
595
596
597
598
599
600
    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))


601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
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)
    result.Raise()
    if not result.data:
      raise errors.OpPrereqError("One or more target bridges %s does not"
                                 " exist on destination node '%s'" %
                                 (brlist, target_node))


def _CheckInstanceBridgesExist(lu, instance, node=None):
621
622
623
  """Check that the brigdes needed by an instance exist.

  """
624
625
626
  if node is None:
    node=instance.primary_node
  _CheckNicsBridgesExist(lu, instance.nics, node)
627
628


Iustin Pop's avatar
Iustin Pop committed
629
630
631
632
633
634
635
636
637
638
639
640
641
642
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
643
    master = self.cfg.GetMasterNode()
Iustin Pop's avatar
Iustin Pop committed
644
645

    nodelist = self.cfg.GetNodeList()
646
    if len(nodelist) != 1 or nodelist[0] != master:
647
648
      raise errors.OpPrereqError("There are still %d node(s) in"
                                 " this cluster." % (len(nodelist) - 1))
649
650
    instancelist = self.cfg.GetInstanceList()
    if instancelist:
651
652
      raise errors.OpPrereqError("There are still %d instance(s) in"
                                 " this cluster." % len(instancelist))
Iustin Pop's avatar
Iustin Pop committed
653
654
655
656
657

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

    """
Michael Hanselmann's avatar
Michael Hanselmann committed
658
    master = self.cfg.GetMasterNode()
659
660
661
    result = self.rpc.call_node_stop_master(master, False)
    result.Raise()
    if not result.data:
662
      raise errors.OpExecError("Could not disable the master role")
663
664
665
    priv_key, pub_key, _ = ssh.GetUserFiles(constants.GANETI_RUNAS)
    utils.CreateBackup(priv_key)
    utils.CreateBackup(pub_key)
Iustin Pop's avatar
Iustin Pop committed
666
    return master
Iustin Pop's avatar
Iustin Pop committed
667
668


Guido Trotter's avatar
Guido Trotter committed
669
class LUVerifyCluster(LogicalUnit):
Iustin Pop's avatar
Iustin Pop committed
670
671
672
  """Verifies the cluster status.

  """
Guido Trotter's avatar
Guido Trotter committed
673
674
  HPATH = "cluster-verify"
  HTYPE = constants.HTYPE_CLUSTER
675
  _OP_REQP = ["skip_checks"]
676
677
678
679
680
681
682
683
  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
684

685
  def _VerifyNode(self, nodeinfo, file_list, local_cksum,
686
                  node_result, feedback_fn, master_files,
687
                  drbd_map, vg_name):
Iustin Pop's avatar
Iustin Pop committed
688
689
    """Run multiple tests against a node.

690
    Test list:
691

Iustin Pop's avatar
Iustin Pop committed
692
693
694
695
696
      - compares ganeti version
      - checks vg existance and size > 20G
      - checks config file checksum
      - checks ssh to other nodes

697
698
    @type nodeinfo: L{objects.Node}
    @param nodeinfo: the node to check
699
700
701
702
    @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
703
    @param master_files: list of files that only masters should have
704
705
706
    @param drbd_map: the useddrbd minors for this node, in
        form of minor: (instance, must_exist) which correspond to instances
        and their running status
707
    @param vg_name: Ganeti Volume Group (result of self.cfg.GetVGName())
708

Iustin Pop's avatar
Iustin Pop committed
709
    """
710
    node = nodeinfo.name
711
712
713
714
715
716

    # 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
717
718
    # compares ganeti version
    local_version = constants.PROTOCOL_VERSION
719
    remote_version = node_result.get('version', None)
720
721
    if not (remote_version and isinstance(remote_version, (list, tuple)) and
            len(remote_version) == 2):
722
      feedback_fn("  - ERROR: connection to %s failed" % (node))
Iustin Pop's avatar
Iustin Pop committed
723
724
      return True

725
726
727
    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
728
729
      return True

730
    # node seems compatible, we can actually try to look into its results
Iustin Pop's avatar
Iustin Pop committed
731
732

    bad = False
733
734
735
736
737
738
739
740

    # 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
741
742
743
744
745
    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
746
        bad = True
747
748
749
750
751
752
      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
753
754
755

    # checks config file checksum

756
757
    remote_cksum = node_result.get(constants.NV_FILELIST, None)
    if not isinstance(remote_cksum, dict):
Iustin Pop's avatar
Iustin Pop committed
758
759
760
761
      bad = True
      feedback_fn("  - ERROR: node hasn't returned file checksum data")
    else:
      for file_name in file_list:
762
763
        node_is_mc = nodeinfo.master_candidate
        must_have_file = file_name not in master_files
Iustin Pop's avatar
Iustin Pop committed
764
        if file_name not in remote_cksum:
765
766
767
          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
768
        elif remote_cksum[file_name] != local_cksum[file_name]:
769
770
771
772
773
774
775
776
777
778
779
780
781
          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
782

783
784
785
    # checks ssh to any

    if constants.NV_NODELIST not in node_result:
Iustin Pop's avatar
Iustin Pop committed
786
      bad = True
787
      feedback_fn("  - ERROR: node hasn't returned node ssh connectivity data")
Iustin Pop's avatar
Iustin Pop committed
788
    else:
789
      if node_result[constants.NV_NODELIST]:
Iustin Pop's avatar
Iustin Pop committed
790
        bad = True
791
        for node in node_result[constants.NV_NODELIST]:
792
          feedback_fn("  - ERROR: ssh communication with node '%s': %s" %
793
794
795
                          (node, node_result[constants.NV_NODELIST][node]))

    if constants.NV_NODENETTEST not in node_result:
796
797
798
      bad = True
      feedback_fn("  - ERROR: node hasn't returned node tcp connectivity data")
    else:
799
      if node_result[constants.NV_NODENETTEST]:
800
        bad = True
801
        nlist = utils.NiceSort(node_result[constants.NV_NODENETTEST].keys())
802
803
        for node in nlist:
          feedback_fn("  - ERROR: tcp communication with node '%s': %s" %
804
                          (node, node_result[constants.NV_NODENETTEST][node]))
805

806
    hyp_result = node_result.get(constants.NV_HYPERVISOR, None)
807
808
809
810
811
    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))
812
813

    # check used drbd list
814
815
816
817
818
819
820
821
    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:
822
823
            feedback_fn("  - ERROR: drbd minor %d of instance %s is"
                        " not active" % (minor, iname))
824
825
826
            bad = True
        for minor in used_minors:
          if minor not in drbd_map:
827
828
            feedback_fn("  - ERROR: unallocated drbd minor %d is in use" %
                        minor)
829
            bad = True
830

Iustin Pop's avatar
Iustin Pop committed
831
832
    return bad

833
  def _VerifyInstance(self, instance, instanceconfig, node_vol_is,
834
                      node_instance, feedback_fn, n_offline):
Iustin Pop's avatar
Iustin Pop committed
835
836
837
838
839
840
841
842
843
844
845
846
847
848
    """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:
849
850
851
      if node in n_offline:
        # ignore missing volumes on offline nodes
        continue
Iustin Pop's avatar
Iustin Pop committed
852
853
854
855
856
857
      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

858
    if instanceconfig.admin_up:
859
860
861
      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
862
863
864
865
866
867
868
869
870
871
872
        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

873
    return bad
Iustin Pop's avatar
Iustin Pop committed
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906

  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

907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
  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
928
          bep = self.cfg.GetClusterInfo().FillBE(instance_cfg[instance])
929
          if bep[constants.BE_AUTO_BALANCE]:
930
            needed_mem += bep[constants.BE_MEMORY]
931
932
933
934
935
936
        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
937
938
939
  def CheckPrereq(self):
    """Check prerequisites.

940
941
    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
942
943

    """
944
945
946
    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
947

Guido Trotter's avatar
Guido Trotter committed
948
949
950
951
952
953
954
955
  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()
956
957
958
959
960
961
    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
962
963
    return env, [], all_nodes

Iustin Pop's avatar
Iustin Pop committed
964
965
966
967
968
969
  def Exec(self, feedback_fn):
    """Verify integrity of cluster, performing various test on nodes.

    """
    bad = False
    feedback_fn("* Verifying global settings")
970
971
    for msg in self.cfg.VerifyConfig():
      feedback_fn("  - ERROR: %s" % msg)
Iustin Pop's avatar
Iustin Pop committed
972
973

    vg_name = self.cfg.GetVGName()
974
    hypervisors = self.cfg.GetClusterInfo().enabled_hypervisors
Iustin Pop's avatar
Iustin Pop committed
975
    nodelist = utils.NiceSort(self.cfg.GetNodeList())
976
    nodeinfo = [self.cfg.GetNodeInfo(nname) for nname in nodelist]
Iustin Pop's avatar
Iustin Pop committed
977
    instancelist = utils.NiceSort(self.cfg.GetInstanceList())
978
979
    instanceinfo = dict((iname, self.cfg.GetInstanceInfo(iname))
                        for iname in instancelist)
980
    i_non_redundant = [] # Non redundant instances
981
    i_non_a_balanced = [] # Non auto-balanced instances
982
    n_offline = [] # List of offline nodes
983
    n_drained = [] # List of nodes being drained
Iustin Pop's avatar
Iustin Pop committed
984
985
    node_volume = {}
    node_instance = {}
986
    node_info = {}
Guido Trotter's avatar
Guido Trotter committed
987
    instance_cfg = {}
Iustin Pop's avatar
Iustin Pop committed
988
989
990

    # FIXME: verify OS list
    # do local checksums
991
992
993
    master_files = [constants.CLUSTER_CONF_FILE]

    file_names = ssconf.SimpleStore().GetFileList()
994
    file_names.append(constants.SSL_CERT_FILE)
995
    file_names.append(constants.RAPI_CERT_FILE)
996
997
    file_names.extend(master_files)

Iustin Pop's avatar
Iustin Pop committed
998
999
1000
1001
    local_checksums = utils.FingerprintFiles(file_names)

    feedback_fn("* Gathering data (%d nodes)" % len(nodelist))
    node_verify_param = {
1002
      constants.NV_FILELIST: file_names,
1003
1004
      constants.NV_NODELIST: [node.name for node in nodeinfo
                              if not node.offline],
1005
1006
      constants.NV_HYPERVISOR: hypervisors,
      constants.NV_NODENETTEST: [(node.name, node.primary_ip,
1007
1008
                                  node.secondary_ip) for node in nodeinfo
                                 if not node.offline],
1009
1010
1011
      constants.NV_INSTANCELIST: hypervisors,
      constants.NV_VERSION: None,
      constants.NV_HVINFO: self.cfg.GetHypervisorType(),
Iustin Pop's avatar
Iustin Pop committed
1012
      }
1013
1014
1015
1016
    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
1017
1018
    all_nvinfo = self.rpc.call_node_verify(nodelist, node_verify_param,
                                           self.cfg.GetClusterName())
Iustin Pop's avatar
Iustin Pop committed
1019

1020
    cluster = self.cfg.GetClusterInfo()
1021
    master_node = self.cfg.GetMasterNode()
1022
1023
    all_drbd_map = self.cfg.ComputeDRBDMap()

1024
1025
    for node_i in nodeinfo:
      node = node_i.name
1026
1027
      nresult = all_nvinfo[node].data

1028
1029
1030
1031
1032
      if node_i.offline:
        feedback_fn("* Skipping offline node %s" % (node,))
        n_offline.append(node)
        continue

1033
      if node == master_node:
1034
        ntype = "master"
1035
      elif node_i.master_candidate:
1036
        ntype = "master candidate"
1037
1038
1039
      elif node_i.drained:
        ntype = "drained"
        n_drained.append(node)
1040
      else:
1041
        ntype = "regular"
1042
      feedback_fn("* Verifying node %s (%s)" % (node, ntype))
1043
1044
1045
1046
1047
1048

      if all_nvinfo[node].failed or not isinstance(nresult, dict):
        feedback_fn("  - ERROR: connection to %s failed" % (node,))
        bad = True
        continue

1049
1050
      node_drbd = {}
      for minor, instance in all_drbd_map[node].items():
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
        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)
1061
      result = self._VerifyNode(node_i, file_names, local_checksums,
1062
                                nresult, feedback_fn, master_files,
1063
                                node_drbd, vg_name)
Iustin Pop's avatar
Iustin Pop committed
1064
1065
      bad = bad or result

1066
      lvdata = nresult.get(constants.NV_LVLIST, "Missing LV data")
1067
1068
1069
      if vg_name is None:
        node_volume[node] = {}
      elif isinstance(lvdata, basestring):
1070
        feedback_fn("  - ERROR: LVM problem on node %s: %s" %
1071
                    (node, utils.SafeEncode(lvdata)))
1072
1073
        bad = True
        node_volume[node] = {}
1074
1075
      elif not isinstance(lvdata, dict):
        feedback_fn("  - ERROR: connection to %s failed (lvlist)" % (node,))
Iustin Pop's avatar
Iustin Pop committed
1076
1077
        bad = True
        continue
1078
      else:
1079
        node_volume[node] = lvdata
Iustin Pop's avatar
Iustin Pop committed
1080
1081

      # node_instance
1082
1083
1084
1085
      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
1086
1087
1088
        bad = True
        continue

1089
      node_instance[node] = idata
Iustin Pop's avatar
Iustin Pop committed
1090

1091
      # node_info
1092
      nodeinfo = nresult.get(constants.NV_HVINFO, None)
1093
      if not isinstance(nodeinfo, dict):
1094
        feedback_fn("  - ERROR: connection to %s failed (hvinfo)" % (node,))
1095
1096
1097
1098
1099
1100
        bad = True
        continue

      try:
        node_info[node] = {
          "mfree": int(nodeinfo['memory_free']),
1101
1102
          "pinst": [],
          "sinst": [],
1103
1104
1105
1106
1107
1108
1109
          # 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": {},
1110
        }
1111
1112
        # FIXME: devise a free space model for file based instances as well
        if vg_name is not None:
1113
1114
1115
1116
1117
1118
1119
          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
1120
          node_info[node]["dfree"] = int(nresult[constants.NV_VGLIST][vg_name])
1121
1122
1123
      except (ValueError, KeyError):
        feedback_fn("  - ERROR: invalid nodeinfo value returned"
                    " from node %s" % (node,))
1124
1125
1126
        bad = True
        continue

Iustin Pop's avatar
Iustin Pop committed
1127
1128
1129
1130
    node_vol_should = {}

    for instance in instancelist:
      feedback_fn("* Verifying instance %s" % instance)
1131
      inst_config = instanceinfo[instance]
1132
      result =  self._VerifyInstance(instance, inst_config, node_volume,
1133
                                     node_instance, feedback_fn, n_offline)
1134
      bad = bad or result
1135
      inst_nodes_offline = []
Iustin Pop's avatar
Iustin Pop committed
1136
1137
1138

      inst_config.MapLVsByNode(node_vol_should)

Guido Trotter's avatar
Guido Trotter committed
1139
1140
      instance_cfg[instance] = inst_config

1141
1142
1143
      pnode = inst_config.primary_node
      if pnode in node_info:
        node_info[pnode]['pinst'].append(instance)
1144
      elif pnode not in n_offline:
1145
1146
1147
1148
        feedback_fn("  - ERROR: instance %s, connection to primary node"
                    " %s failed" % (instance, pnode))
        bad = True

1149
1150
1151
      if pnode in n_offline:
        inst_nodes_offline.append(pnode)

1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
      # 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)

1163
      if not cluster.FillBE(inst_config)[constants.BE_AUTO_BALANCE]:
1164
1165
        i_non_a_balanced.append(instance)

1166
1167
1168
      for snode in inst_config.secondary_nodes:
        if snode in node_info:
          node_info[snode]['sinst'].append(instance)
1169
1170
1171
          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)
1172
        elif snode not in n_offline:
1173
1174
          feedback_fn("  - ERROR: instance %s, connection to secondary node"
                      " %s failed" % (instance, snode))
1175
1176
1177
1178
1179
1180
1181
1182
1183
          bad = True
        if snode in n_offline:
          inst_nodes_offline.append(snode)

      if inst_nodes_offline:
        # warn that the instance lives on offline nodes, and set bad=True
        feedback_fn("  - ERROR: instance lives on offline node(s) %s" %
                    ", ".join(inst_nodes_offline))
        bad = True
1184

Iustin Pop's avatar
Iustin Pop committed
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
    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

1195
1196
1197
1198
    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
1199
1200
1201
1202
1203
1204

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

1205
1206
1207
1208
    if i_non_a_balanced:
      feedback_fn("  - NOTICE: %d non-auto-balanced instance(s) found."
                  % len(i_non_a_balanced))

1209
1210
1211
    if n_offline:
      feedback_fn("  - NOTICE: %d offline node(s) found." % len(n_offline))

1212
1213
1214
    if n_drained:
      feedback_fn("  - NOTICE: %d drained node(s) found." % len(n_drained))

1215
    return not bad
Iustin Pop's avatar
Iustin Pop committed
1216

Guido Trotter's avatar
Guido Trotter committed
1217
  def HooksCallBack(self, phase, hooks_results, feedback_fn, lu_result):
1218
1219
1220
    """Analize the post-hooks' result

    This method analyses the hook result, handles it, and sends some
Guido Trotter's avatar
Guido Trotter committed
1221
1222
    nicely-formatted feedback back to the user.

1223
1224
1225
1226
1227
1228
1229
    @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
1230
1231

    """
Iustin Pop's avatar
Iustin Pop committed
1232
1233
    # We only really run POST phase hooks, and are only interested in
    # their results
Guido Trotter's avatar
Guido Trotter committed
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
    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]
1245
          if res.failed or res.data is False or not isinstance(res.data, list):
1246
1247
1248
            if res.offline:
              # no need to warn or set fail return value
              continue
1249
            feedback_fn("    Communication failure in hooks execution")
Guido Trotter's avatar
Guido Trotter committed
1250
1251
            lu_result = 1
            continue
1252
          for script, hkr, output in res.data:
Guido Trotter's avatar
Guido Trotter committed
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
            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
1266

Iustin Pop's avatar
Iustin Pop committed
1267
1268
1269
1270
1271
class LUVerifyDisks(NoHooksLU):
  """Verifies the cluster disks status.

  """
  _OP_REQP = []
1272
1273
1274
1275
1276
1277
1278
1279
  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
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292

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

    This has no prerequisites.

    """
    pass

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

    """
1293
    result = res_nodes, res_nlvm, res_instances, res_missing = [], {}, [], {}
Iustin Pop's avatar
Iustin Pop committed
1294
1295
1296
1297
1298
1299
1300