cmdlib.py 327 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
# pylint: disable-msg=W0201

# W0201 since most LU attributes are defined in CheckPrereq or similar
# functions
Iustin Pop's avatar
Iustin Pop committed
28
29
30
31
32
33

import os
import os.path
import time
import re
import platform
34
import logging
35
import copy
36
import OpenSSL
Iustin Pop's avatar
Iustin Pop committed
37
38
39
40
41

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


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

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

  Note that all commands require root permissions.
Iustin Pop's avatar
Iustin Pop committed
62

63
64
65
  @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
66
67
68
69
  """
  HPATH = None
  HTYPE = None
  _OP_REQP = []
70
  REQ_BGL = True
Iustin Pop's avatar
Iustin Pop committed
71

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

Michael Hanselmann's avatar
Michael Hanselmann committed
75
    This needs to be overridden in derived classes in order to check op
Iustin Pop's avatar
Iustin Pop committed
76
77
78
    validity.

    """
Iustin Pop's avatar
Iustin Pop committed
79
    self.proc = processor
Iustin Pop's avatar
Iustin Pop committed
80
    self.op = op
Guido Trotter's avatar
Guido Trotter committed
81
82
    self.cfg = context.cfg
    self.context = context
Iustin Pop's avatar
Iustin Pop committed
83
    self.rpc = rpc
84
    # Dicts used to declare locking needs to mcpu
85
    self.needed_locks = None
86
    self.acquired_locks = {}
87
    self.share_locks = dict.fromkeys(locking.LEVELS, 0)
88
89
    self.add_locks = {}
    self.remove_locks = {}
90
91
    # Used to force good behavior when calling helper functions
    self.recalculate_locks = {}
92
    self.__ssh = None
93
    # logging
Iustin Pop's avatar
Iustin Pop committed
94
95
    self.LogWarning = processor.LogWarning # pylint: disable-msg=C0103
    self.LogInfo = processor.LogInfo # pylint: disable-msg=C0103
96
    self.LogStep = processor.LogStep # pylint: disable-msg=C0103
97
98
    # support for dry-run
    self.dry_run_result = None
99
100
101
102
    # support for generic debug attribute
    if (not hasattr(self.op, "debug_level") or
        not isinstance(self.op.debug_level, int)):
      self.op.debug_level = 0
103

104
    # Tasklets
105
    self.tasklets = None
106

Iustin Pop's avatar
Iustin Pop committed
107
108
109
    for attr_name in self._OP_REQP:
      attr_val = getattr(op, attr_name, None)
      if attr_val is None:
110
        raise errors.OpPrereqError("Required parameter '%s' missing" %
111
                                   attr_name, errors.ECODE_INVAL)
112

113
    self.CheckArguments()
Iustin Pop's avatar
Iustin Pop committed
114

115
116
117
118
119
  def __GetSSH(self):
    """Returns the SshRunner object

    """
    if not self.__ssh:
120
      self.__ssh = ssh.SshRunner(self.cfg.GetClusterName())
121
122
123
124
    return self.__ssh

  ssh = property(fget=__GetSSH)

125
126
127
128
129
130
131
132
133
  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
134
      - CheckPrereq is run after we have acquired locks (and possible
135
136
137
138
139
140
141
142
        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

143
144
145
146
147
148
149
150
151
152
153
  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:
154
155
156
157
158

      - 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
159

Guido Trotter's avatar
Guido Trotter committed
160
161
162
163
    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.

164
165
166
167
    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.

168
169
170
171
172
173
174
175
176
177
178
179
180
    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
181
182
183
184
185
186
187
188
189
190

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

    """
224
    if self.tasklets is not None:
225
      for (idx, tl) in enumerate(self.tasklets):
226
227
        logging.debug("Checking prerequisites for tasklet %s/%s",
                      idx + 1, len(self.tasklets))
228
229
230
        tl.CheckPrereq()
    else:
      raise NotImplementedError
Iustin Pop's avatar
Iustin Pop committed
231
232
233
234
235
236
237
238
239

  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.

    """
240
    if self.tasklets is not None:
241
      for (idx, tl) in enumerate(self.tasklets):
242
        logging.debug("Executing tasklet %s/%s", idx + 1, len(self.tasklets))
243
244
245
        tl.Exec(feedback_fn)
    else:
      raise NotImplementedError
Iustin Pop's avatar
Iustin Pop committed
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260

  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.

261
    No nodes should be returned as an empty list (and not None).
Iustin Pop's avatar
Iustin Pop committed
262
263
264
265
266
267
268

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

    """
    raise NotImplementedError

269
270
271
272
273
274
275
276
277
  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.

278
279
280
281
282
283
284
285
    @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
286
287

    """
288
289
290
    # API must be kept, thus we ignore the unused argument and could
    # be a function warnings
    # pylint: disable-msg=W0613,R0201
291
292
    return lu_result

293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
  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"
308
309
310
    self.op.instance_name = _ExpandInstanceName(self.cfg,
                                                self.op.instance_name)
    self.needed_locks[locking.LEVEL_INSTANCE] = self.op.instance_name
311

312
  def _LockInstancesNodes(self, primary_only=False):
313
314
315
316
317
318
319
320
321
322
323
324
325
    """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.

326
    If should be called in DeclareLocks in a way similar to::
327

328
329
      if level == locking.LEVEL_NODE:
        self._LockInstancesNodes()
330

331
332
333
    @type primary_only: boolean
    @param primary_only: only lock primary nodes of locked instances

334
335
336
337
338
339
340
341
342
343
    """
    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 = []
344
    for instance_name in self.acquired_locks[locking.LEVEL_INSTANCE]:
345
346
      instance = self.context.cfg.GetInstanceInfo(instance_name)
      wanted_nodes.append(instance.primary_node)
347
348
      if not primary_only:
        wanted_nodes.extend(instance.secondary_nodes)
349
350
351
352
353

    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)
354
355
356

    del self.recalculate_locks[locking.LEVEL_NODE]

Iustin Pop's avatar
Iustin Pop committed
357

Iustin Pop's avatar
Iustin Pop committed
358
class NoHooksLU(LogicalUnit): # pylint: disable-msg=W0223
Iustin Pop's avatar
Iustin Pop committed
359
360
361
362
363
364
365
366
367
  """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

368
369
370
371
372
373
374
375
  def BuildHooksEnv(self):
    """Empty BuildHooksEnv for NoHooksLu.

    This just raises an error.

    """
    assert False, "BuildHooksEnv called for NoHooksLUs"

Iustin Pop's avatar
Iustin Pop committed
376

377
378
379
380
381
382
383
384
385
386
387
388
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

  """
389
390
391
392
393
394
395
  def __init__(self, lu):
    self.lu = lu

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

396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
  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


423
def _GetWantedNodes(lu, nodes):
424
  """Returns list of checked and expanded node names.
425

426
427
428
429
430
431
  @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
Iustin Pop's avatar
Iustin Pop committed
432
  @raise errors.ProgrammerError: if the nodes parameter is wrong type
433
434

  """
435
  if not isinstance(nodes, list):
436
437
    raise errors.OpPrereqError("Invalid argument type 'nodes'",
                               errors.ECODE_INVAL)
438

439
440
441
  if not nodes:
    raise errors.ProgrammerError("_GetWantedNodes should only be called with a"
      " non-empty list of nodes whose name is to be expanded.")
442

Iustin Pop's avatar
Iustin Pop committed
443
  wanted = [_ExpandNodeName(lu.cfg, name) for name in nodes]
444
  return utils.NiceSort(wanted)
445
446
447


def _GetWantedInstances(lu, instances):
448
  """Returns list of checked and expanded instance names.
449

450
451
452
453
454
455
456
457
  @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
458
459
460

  """
  if not isinstance(instances, list):
461
462
    raise errors.OpPrereqError("Invalid argument type 'instances'",
                               errors.ECODE_INVAL)
463
464

  if instances:
465
    wanted = [_ExpandInstanceName(lu.cfg, name) for name in instances]
466
  else:
467
468
    wanted = utils.NiceSort(lu.cfg.GetInstanceList())
  return wanted
469
470
471


def _CheckOutputFields(static, dynamic, selected):
472
473
  """Checks whether all selected fields are valid.

Iustin Pop's avatar
Iustin Pop committed
474
  @type static: L{utils.FieldSet}
Iustin Pop's avatar
Iustin Pop committed
475
  @param static: static fields set
Iustin Pop's avatar
Iustin Pop committed
476
  @type dynamic: L{utils.FieldSet}
Iustin Pop's avatar
Iustin Pop committed
477
  @param dynamic: dynamic fields set
478
479

  """
Iustin Pop's avatar
Iustin Pop committed
480
  f = utils.FieldSet()
Iustin Pop's avatar
Iustin Pop committed
481
482
  f.Extend(static)
  f.Extend(dynamic)
483

Iustin Pop's avatar
Iustin Pop committed
484
485
  delta = f.NonMatching(selected)
  if delta:
486
    raise errors.OpPrereqError("Unknown output fields selected: %s"
487
                               % ",".join(delta), errors.ECODE_INVAL)
488
489


490
491
492
493
494
495
496
497
498
499
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)" %
500
                               (name, str(val)), errors.ECODE_INVAL)
501
502
503
  setattr(op, name, val)


504
505
506
507
508
509
510
511
512
513
514
def _CheckGlobalHvParams(params):
  """Validates that given hypervisor params are not global ones.

  This will ensure that instances don't get customised versions of
  global params.

  """
  used_globals = constants.HVC_GLOBALS.intersection(params)
  if used_globals:
    msg = ("The following hypervisor parameters are global and cannot"
           " be customized at instance level, please modify them at"
515
           " cluster level: %s" % utils.CommaJoin(used_globals))
516
517
518
    raise errors.OpPrereqError(msg, errors.ECODE_INVAL)


519
520
521
522
523
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
524
  @raise errors.OpPrereqError: if the node is offline
525
526
527

  """
  if lu.cfg.GetNodeInfo(node).offline:
528
529
    raise errors.OpPrereqError("Can't use offline node %s" % node,
                               errors.ECODE_INVAL)
530
531


532
533
534
535
536
537
538
539
540
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:
541
542
    raise errors.OpPrereqError("Can't use drained node %s" % node,
                               errors.ECODE_INVAL)
543
544


545
546
547
548
549
550
551
552
553
554
def _CheckDiskTemplate(template):
  """Ensure a given disk template is valid.

  """
  if template not in constants.DISK_TEMPLATES:
    msg = ("Invalid disk template name '%s', valid templates are: %s" %
           (template, utils.CommaJoin(constants.DISK_TEMPLATES)))
    raise errors.OpPrereqError(msg, errors.ECODE_INVAL)


555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
def _CheckInstanceDown(lu, instance, reason):
  """Ensure that an instance is not running."""
  if instance.admin_up:
    raise errors.OpPrereqError("Instance %s is marked to be up, %s" %
                               (instance.name, reason), errors.ECODE_STATE)

  pnode = instance.primary_node
  ins_l = lu.rpc.call_instance_list([pnode], [instance.hypervisor])[pnode]
  ins_l.Raise("Can't contact node %s for instance information" % pnode,
              prereq=True, ecode=errors.ECODE_ENVIRON)

  if instance.name in ins_l.payload:
    raise errors.OpPrereqError("Instance %s is running, %s" %
                               (instance.name, reason), errors.ECODE_STATE)


571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
def _ExpandItemName(fn, name, kind):
  """Expand an item name.

  @param fn: the function to use for expansion
  @param name: requested item name
  @param kind: text description ('Node' or 'Instance')
  @return: the resolved (full) name
  @raise errors.OpPrereqError: if the item is not found

  """
  full_name = fn(name)
  if full_name is None:
    raise errors.OpPrereqError("%s '%s' not known" % (kind, name),
                               errors.ECODE_NOENT)
  return full_name


def _ExpandNodeName(cfg, name):
  """Wrapper over L{_ExpandItemName} for nodes."""
  return _ExpandItemName(cfg.ExpandNodeName, name, "Node")


def _ExpandInstanceName(cfg, name):
  """Wrapper over L{_ExpandItemName} for instance."""
  return _ExpandItemName(cfg.ExpandInstanceName, name, "Instance")


598
def _BuildInstanceHookEnv(name, primary_node, secondary_nodes, os_type, status,
599
                          memory, vcpus, nics, disk_template, disks,
Michael Hanselmann's avatar
Michael Hanselmann committed
600
                          bep, hvp, hypervisor_name):
601
602
603
604
605
606
607
608
609
610
611
612
  """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
613
614
  @type status: boolean
  @param status: the should_run status of the instance
615
616
617
618
619
  @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
620
621
  @param nics: list of tuples (ip, mac, mode, link) representing
      the NICs the instance has
Iustin Pop's avatar
Iustin Pop committed
622
  @type disk_template: string
Michael Hanselmann's avatar
Michael Hanselmann committed
623
  @param disk_template: the disk template of the instance
Iustin Pop's avatar
Iustin Pop committed
624
625
  @type disks: list
  @param disks: the list of (size, mode) pairs
626
627
628
629
  @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
630
631
  @type hypervisor_name: string
  @param hypervisor_name: the hypervisor for the instance
632
633
  @rtype: dict
  @return: the hook environment for this instance
634

635
  """
636
637
638
639
  if status:
    str_status = "up"
  else:
    str_status = "down"
640
  env = {
641
    "OP_TARGET": name,
642
643
644
    "INSTANCE_NAME": name,
    "INSTANCE_PRIMARY": primary_node,
    "INSTANCE_SECONDARIES": " ".join(secondary_nodes),
645
    "INSTANCE_OS_TYPE": os_type,
646
    "INSTANCE_STATUS": str_status,
647
648
    "INSTANCE_MEMORY": memory,
    "INSTANCE_VCPUS": vcpus,
Iustin Pop's avatar
Iustin Pop committed
649
    "INSTANCE_DISK_TEMPLATE": disk_template,
Michael Hanselmann's avatar
Michael Hanselmann committed
650
    "INSTANCE_HYPERVISOR": hypervisor_name,
651
652
653
654
  }

  if nics:
    nic_count = len(nics)
655
    for idx, (ip, mac, mode, link) in enumerate(nics):
656
657
658
      if ip is None:
        ip = ""
      env["INSTANCE_NIC%d_IP" % idx] = ip
Iustin Pop's avatar
Iustin Pop committed
659
      env["INSTANCE_NIC%d_MAC" % idx] = mac
660
661
662
663
      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
664
665
666
667
668
  else:
    nic_count = 0

  env["INSTANCE_NIC_COUNT"] = nic_count

Iustin Pop's avatar
Iustin Pop committed
669
670
671
672
673
674
675
676
677
678
  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

679
680
681
682
  for source, kind in [(bep, "BE"), (hvp, "HV")]:
    for key, value in source.items():
      env["INSTANCE_%s_%s" % (kind, key)] = value

683
684
  return env

685

686
def _NICListToTuple(lu, nics):
687
688
  """Build a list of nic information tuples.

689
690
  This list is suitable to be passed to _BuildInstanceHookEnv or as a return
  value in LUQueryInstanceData.
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707

  @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
708

709

Iustin Pop's avatar
Iustin Pop committed
710
def _BuildInstanceHookEnvByObject(lu, instance, override=None):
711
712
  """Builds instance related env variables for hooks from an object.

713
714
715
716
717
718
719
720
721
722
723
  @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

724
  """
725
726
727
  cluster = lu.cfg.GetClusterInfo()
  bep = cluster.FillBE(instance)
  hvp = cluster.FillHV(instance)
728
729
730
731
  args = {
    'name': instance.name,
    'primary_node': instance.primary_node,
    'secondary_nodes': instance.secondary_nodes,
732
    'os_type': instance.os,
733
    'status': instance.admin_up,
Iustin Pop's avatar
Iustin Pop committed
734
735
    'memory': bep[constants.BE_MEMORY],
    'vcpus': bep[constants.BE_VCPUS],
736
    'nics': _NICListToTuple(lu, instance.nics),
Iustin Pop's avatar
Iustin Pop committed
737
738
    'disk_template': instance.disk_template,
    'disks': [(disk.size, disk.mode) for disk in instance.disks],
739
740
    'bep': bep,
    'hvp': hvp,
741
    'hypervisor_name': instance.hypervisor,
742
743
744
  }
  if override:
    args.update(override)
Iustin Pop's avatar
Iustin Pop committed
745
  return _BuildInstanceHookEnv(**args) # pylint: disable-msg=W0142
746
747


Guido Trotter's avatar
Guido Trotter committed
748
def _AdjustCandidatePool(lu, exceptions):
749
750
751
  """Adjust the candidate pool after node operations.

  """
Guido Trotter's avatar
Guido Trotter committed
752
  mod_list = lu.cfg.MaintainCandidatePool(exceptions)
753
754
  if mod_list:
    lu.LogInfo("Promoted nodes to master candidate role: %s",
755
               utils.CommaJoin(node.name for node in mod_list))
756
757
    for name in mod_list:
      lu.context.ReaddNode(name)
Guido Trotter's avatar
Guido Trotter committed
758
  mc_now, mc_max, _ = lu.cfg.GetMasterCandidateStats(exceptions)
759
760
761
762
763
  if mc_now > mc_max:
    lu.LogInfo("Note: more nodes are candidates (%d) than desired (%d)" %
               (mc_now, mc_max))


764
765
766
767
768
769
770
771
772
773
774
def _DecideSelfPromotion(lu, exceptions=None):
  """Decide whether I should promote myself as a master candidate.

  """
  cp_size = lu.cfg.GetClusterInfo().candidate_pool_size
  mc_now, mc_should, _ = lu.cfg.GetMasterCandidateStats(exceptions)
  # the new node will increase mc_max with one, so:
  mc_should = min(mc_should + 1, cp_size)
  return mc_now < mc_should


775
776
777
778
779
780
781
782
783
784
785
786
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)
787
    result.Raise("Error checking bridges on destination node '%s'" %
788
                 target_node, prereq=True, ecode=errors.ECODE_ENVIRON)
789
790
791


def _CheckInstanceBridgesExist(lu, instance, node=None):
792
793
794
  """Check that the brigdes needed by an instance exist.

  """
795
  if node is None:
Iustin Pop's avatar
Iustin Pop committed
796
    node = instance.primary_node
797
  _CheckNicsBridgesExist(lu, instance.nics, node)
798
799


Iustin Pop's avatar
Iustin Pop committed
800
def _CheckOSVariant(os_obj, name):
Guido Trotter's avatar
Guido Trotter committed
801
802
  """Check whether an OS name conforms to the os variants specification.

Iustin Pop's avatar
Iustin Pop committed
803
804
  @type os_obj: L{objects.OS}
  @param os_obj: OS object to check
Guido Trotter's avatar
Guido Trotter committed
805
806
807
808
  @type name: string
  @param name: OS name passed by the user, to check for validity

  """
Iustin Pop's avatar
Iustin Pop committed
809
  if not os_obj.supported_variants:
Guido Trotter's avatar
Guido Trotter committed
810
811
812
813
    return
  try:
    variant = name.split("+", 1)[1]
  except IndexError:
814
815
    raise errors.OpPrereqError("OS name must include a variant",
                               errors.ECODE_INVAL)
Guido Trotter's avatar
Guido Trotter committed
816

Iustin Pop's avatar
Iustin Pop committed
817
  if variant not in os_obj.supported_variants:
818
    raise errors.OpPrereqError("Unsupported OS variant", errors.ECODE_INVAL)
Guido Trotter's avatar
Guido Trotter committed
819
820


821
822
823
824
def _GetNodeInstancesInner(cfg, fn):
  return [i for i in cfg.GetAllInstancesInfo().values() if fn(i)]


825
826
827
828
829
830
831
832
def _GetNodeInstances(cfg, node_name):
  """Returns a list of all primary and secondary instances on a node.

  """

  return _GetNodeInstancesInner(cfg, lambda inst: node_name in inst.all_nodes)


833
834
835
836
def _GetNodePrimaryInstances(cfg, node_name):
  """Returns primary instances on a node.

  """
837
838
  return _GetNodeInstancesInner(cfg,
                                lambda inst: node_name == inst.primary_node)
839
840


841
842
843
844
def _GetNodeSecondaryInstances(cfg, node_name):
  """Returns secondary instances on a node.

  """
845
846
  return _GetNodeInstancesInner(cfg,
                                lambda inst: node_name in inst.secondary_nodes)
847
848


849
850
851
852
853
854
def _GetStorageTypeArgs(cfg, storage_type):
  """Returns the arguments for a storage type.

  """
  # Special case for file storage
  if storage_type == constants.ST_FILE:
855
856
    # storage.FileStorage wants a list of storage directories
    return [[cfg.GetFileStorageDir()]]
857
858
859
860

  return []


861
862
863
864
865
866
867
868
def _FindFaultyInstanceDisks(cfg, rpc, instance, node_name, prereq):
  faulty = []

  for dev in instance.disks:
    cfg.SetDiskID(dev, node_name)

  result = rpc.call_blockdev_getmirrorstatus(node_name, instance.disks)
  result.Raise("Failed to get disk status from node %s" % node_name,
869
               prereq=prereq, ecode=errors.ECODE_ENVIRON)
870
871
872
873
874
875
876
877

  for idx, bdev_status in enumerate(result.payload):
    if bdev_status and bdev_status.ldisk_status == constants.LDS_FAULTY:
      faulty.append(idx)

  return faulty


878
879
880
881
882
883
884
def _FormatTimestamp(secs):
  """Formats a Unix timestamp with the local timezone.

  """
  return time.strftime("%F %T %Z", time.gmtime(secs))


885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
class LUPostInitCluster(LogicalUnit):
  """Logical unit for running hooks after cluster initialization.

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

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

    """
    env = {"OP_TARGET": self.cfg.GetClusterName()}
    mn = self.cfg.GetMasterNode()
    return env, [], [mn]

  def CheckPrereq(self):
    """No prerequisites to check.

    """
    return True

  def Exec(self, feedback_fn):
    """Nothing to do.

    """
    return True


914
class LUDestroyCluster(LogicalUnit):
Iustin Pop's avatar
Iustin Pop committed
915
916
917
  """Logical unit for destroying the cluster.

  """
918
919
  HPATH = "cluster-destroy"
  HTYPE = constants.HTYPE_CLUSTER
Iustin Pop's avatar
Iustin Pop committed
920
921
  _OP_REQP = []

922
923
924
925
926
927
928
  def BuildHooksEnv(self):
    """Build hooks env.

    """
    env = {"OP_TARGET": self.cfg.GetClusterName()}
    return env, [], []

Iustin Pop's avatar
Iustin Pop committed
929
930
931
932
933
  def CheckPrereq(self):
    """Check prerequisites.

    This checks whether the cluster is empty.

Michael Hanselmann's avatar
Michael Hanselmann committed
934
    Any errors are signaled by raising errors.OpPrereqError.
Iustin Pop's avatar
Iustin Pop committed
935
936

    """
Michael Hanselmann's avatar
Michael Hanselmann committed
937
    master = self.cfg.GetMasterNode()
Iustin Pop's avatar
Iustin Pop committed
938
939

    nodelist = self.cfg.GetNodeList()
940
    if len(nodelist) != 1 or nodelist[0] != master:
941
      raise errors.OpPrereqError("There are still %d node(s) in"
942
943
                                 " this cluster." % (len(nodelist) - 1),
                                 errors.ECODE_INVAL)
944
945
    instancelist = self.cfg.GetInstanceList()
    if instancelist:
946
      raise errors.OpPrereqError("There are still %d instance(s) in"
947
948
                                 " this cluster." % len(instancelist),
                                 errors.ECODE_INVAL)
Iustin Pop's avatar
Iustin Pop committed
949
950
951
952
953

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

    """
Michael Hanselmann's avatar
Michael Hanselmann committed
954
    master = self.cfg.GetMasterNode()
955
    modify_ssh_setup = self.cfg.GetClusterInfo().modify_ssh_setup
Luca Bigliardi's avatar
Luca Bigliardi committed
956
957
958
959
960
961

    # Run post hooks on master node before it's removed
    hm = self.proc.hmclass(self.rpc.call_hooks_runner, self)
    try:
      hm.RunPhase(constants.HOOKS_PHASE_POST, [master])
    except:
Iustin Pop's avatar
Iustin Pop committed
962
      # pylint: disable-msg=W0702
Luca Bigliardi's avatar
Luca Bigliardi committed
963
964
      self.LogWarning("Errors occurred running hooks on %s" % master)

965
    result = self.rpc.call_node_stop_master(master, False)
966
    result.Raise("Could not disable the master role")
967
968
969
970
971
972

    if modify_ssh_setup:
      priv_key, pub_key, _ = ssh.GetUserFiles(constants.GANETI_RUNAS)
      utils.CreateBackup(priv_key)
      utils.CreateBackup(pub_key)

Iustin Pop's avatar
Iustin Pop committed
973
    return master
Iustin Pop's avatar
Iustin Pop committed
974
975


976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
def _VerifyCertificateInner(filename, expired, not_before, not_after, now,
                            warn_days=constants.SSL_CERT_EXPIRATION_WARN,
                            error_days=constants.SSL_CERT_EXPIRATION_ERROR):
  """Verifies certificate details for LUVerifyCluster.

  """
  if expired:
    msg = "Certificate %s is expired" % filename

    if not_before is not None and not_after is not None:
      msg += (" (valid from %s to %s)" %
              (_FormatTimestamp(not_before),
               _FormatTimestamp(not_after)))
    elif not_before is not None:
      msg += " (valid from %s)" % _FormatTimestamp(not_before)
    elif not_after is not None:
      msg += " (valid until %s)" % _FormatTimestamp(not_after)

    return (LUVerifyCluster.ETYPE_ERROR, msg)

  elif not_before is not None and not_before > now:
    return (LUVerifyCluster.ETYPE_WARNING,
            "Certificate %s not yet valid (valid from %s)" %
            (filename, _FormatTimestamp(not_before)))

  elif not_after is not None:
    remaining_days = int((not_after - now) / (24 * 3600))

    msg = ("Certificate %s expires in %d days" % (filename, remaining_days))

    if remaining_days <= error_days:
      return (LUVerifyCluster.ETYPE_ERROR, msg)

    if remaining_days <= warn_days:
      return (LUVerifyCluster.ETYPE_WARNING, msg)

  return (None, None)


def _VerifyCertificate(filename):
  """Verifies a certificate for LUVerifyCluster.

  @type filename: string
  @param filename: Path to PEM file

  """
  try:
    cert = OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM,
                                           utils.ReadFile(filename))
  except Exception, err: # pylint: disable-msg=W0703
    return (LUVerifyCluster.ETYPE_ERROR,
            "Failed to load X509 certificate %s: %s" % (filename, err))

  # Depending on the pyOpenSSL version, this can just return (None, None)
  (not_before, not_after) = utils.GetX509CertValidity(cert)

  return _VerifyCertificateInner(filename, cert.has_expired(),
                                 not_before, not_after, time.time())


Guido Trotter's avatar
Guido Trotter committed
1036
class LUVerifyCluster(LogicalUnit):
Iustin Pop's avatar
Iustin Pop committed
1037
1038
1039
  """Verifies the cluster status.

  """
Guido Trotter's avatar
Guido Trotter committed
1040
1041
  HPATH = "cluster-verify"
  HTYPE = constants.HTYPE_CLUSTER
1042
  _OP_REQP = ["skip_checks", "verbose", "error_codes", "debug_simulate_errors"]
1043
1044
  REQ_BGL = False

1045
1046
1047
1048
1049
  TCLUSTER = "cluster"
  TNODE = "node"
  TINSTANCE = "instance"

  ECLUSTERCFG = (TCLUSTER, "ECLUSTERCFG")
1050
  ECLUSTERCERT = (TCLUSTER, "ECLUSTERCERT")
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
  EINSTANCEBADNODE = (TINSTANCE, "EINSTANCEBADNODE")
  EINSTANCEDOWN = (TINSTANCE, "EINSTANCEDOWN")
  EINSTANCELAYOUT = (TINSTANCE, "EINSTANCELAYOUT")
  EINSTANCEMISSINGDISK = (TINSTANCE, "EINSTANCEMISSINGDISK")
  EINSTANCEMISSINGDISK = (TINSTANCE, "EINSTANCEMISSINGDISK")
  EINSTANCEWRONGNODE = (TINSTANCE, "EINSTANCEWRONGNODE")
  ENODEDRBD = (TNODE, "ENODEDRBD")
  ENODEFILECHECK = (TNODE, "ENODEFILECHECK")
  ENODEHOOKS = (TNODE, "ENODEHOOKS")
  ENODEHV = (TNODE, "ENODEHV")
  ENODELVM = (TNODE, "ENODELVM")
  ENODEN1 = (TNODE, "ENODEN1")
  ENODENET = (TNODE, "ENODENET")
  ENODEORPHANINSTANCE = (TNODE, "ENODEORPHANINSTANCE")
  ENODEORPHANLV = (TNODE, "ENODEORPHANLV")
  ENODERPC = (TNODE, "ENODERPC")
  ENODESSH = (TNODE, "ENODESSH")
  ENODEVERSION = (TNODE, "ENODEVERSION")
1069
  ENODESETUP = (TNODE, "ENODESETUP")
1070
  ENODETIME = (TNODE, "ENODETIME")
1071

1072
1073
1074
1075
  ETYPE_FIELD = "code"
  ETYPE_ERROR = "ERROR"
  ETYPE_WARNING = "WARNING"

1076
1077
1078
1079
1080
  def ExpandNames(self):
    self.needed_locks = {
      locking.LEVEL_NODE: locking.ALL_SET,
      locking.LEVEL_INSTANCE: locking.ALL_SET,
    }
1081
    self.share_locks = dict.fromkeys(locking.LEVELS, 1)
Iustin Pop's avatar
Iustin Pop committed
1082

1083
1084
1085
1086
1087
1088
1089
1090
1091
  def _Error(self, ecode, item, msg, *args, **kwargs):
    """Format an error message.

    Based on the opcode's error_codes parameter, either format a
    parseable error code, or a simpler error string.

    This must be called only from Exec and functions called from Exec.

    """
1092
    ltype = kwargs.get(self.ETYPE_FIELD, self.ETYPE_ERROR)
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
    itype, etxt = ecode
    # first complete the msg
    if args:
      msg = msg % args
    # then format the whole message
    if self.op.error_codes:
      msg = "%s:%s:%s:%s:%s" % (ltype, etxt, itype, item, msg)
    else:
      if item:
        item = " " + item
      else:
        item = ""
      msg = "%s: %s%s: %s" % (ltype, itype, item, msg)
    # and finally report it via the feedback_fn
    self._feedback_fn("  - %s" % msg)

1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
  def _ErrorIf(self, cond, *args, **kwargs):
    """Log an error message if the passed condition is True.

    """
    cond = bool(cond) or self.op.debug_simulate_errors
    if cond:
      self._Error(*args, **kwargs)
    # do not mark the operation as failed for WARN cases only
    if kwargs.get(self.ETYPE_FIELD, self.ETYPE_ERROR) == self.ETYPE_ERROR:
      self.bad = self.bad or cond

1120
  def _VerifyNode(self, nodeinfo, file_list, local_cksum,
1121
                  node_result, master_files, drbd_map, vg_name):
Iustin Pop's avatar
Iustin Pop committed
1122
1123
    """Run multiple tests against a node.

1124
    Test list:
1125

Iustin Pop's avatar
Iustin Pop committed
1126
      - compares ganeti version
Michael Hanselmann's avatar
Michael Hanselmann committed
1127
      - checks vg existence and size > 20G
Iustin Pop's avatar
Iustin Pop committed
1128
1129
1130
      - checks config file checksum
      - checks ssh to other nodes

1131
1132
    @type nodeinfo: L{objects.Node}
    @param nodeinfo: the node to check
1133
1134
1135
    @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
1136
    @param master_files: list of files that only masters should have
1137
1138
1139
    @param drbd_map: the useddrbd minors for this node, in
        form of minor: (instance, must_exist) which correspond to instances
        and their running status
1140
    @param vg_name: Ganeti Volume Group (result of self.cfg.GetVGName())
1141

Iustin Pop's avatar
Iustin Pop committed
1142
    """
1143
    node = nodeinfo.name
Iustin Pop's avatar
Iustin Pop committed
1144
    _ErrorIf = self._ErrorIf # pylint: disable-msg=C0103
1145
1146

    # main result, node_result should be a non-empty dict
1147
1148
    test = not node_result or not isinstance(node_result, dict)
    _ErrorIf(test, self.ENODERPC, node,
1149
                  "unable to verify node: no data returned")
1150
1151
    if test:
      return
1152

Iustin Pop's avatar
Iustin Pop committed
1153
1154
    # compares ganeti version
    local_version = constants.PROTOCOL_VERSION
1155
    remote_version = node_result.get('version', None)
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
    test = not (remote_version and
                isinstance(remote_version, (list, tuple)) and
                len(remote_version) == 2)
    _ErrorIf(test, self.ENODERPC, node,
             "connection to node returned invalid data")
    if test:
      return

    test = local_version != remote_version[0]
    _ErrorIf(test, self.ENODEVERSION, node,
             "incompatible protocol versions: master %s,"
             " node %s", local_version, remote_version[0])
    if test:
      return
Iustin Pop's avatar
Iustin Pop committed
1170

1171
    # node seems compatible, we can actually try to look into its results
Iustin Pop's avatar
Iustin Pop committed
1172

1173
    # full package version
1174
1175
    self._ErrorIf(constants.RELEASE_VERSION != remote_version[1],
                  self.ENODEVERSION, node,
1176
1177
                  "software version mismatch: master %s, node %s",
                  constants.RELEASE_VERSION, remote_version[1],
1178
                  code=self.ETYPE_WARNING)
1179
1180

    # checks vg existence and size > 20G
1181
1182
    if vg_name is not None:
      vglist = node_result.get(constants.NV_VGLIST, None)
1183
1184
1185
      test = not vglist
      _ErrorIf(test, self.ENODELVM, node, "unable to check volume groups")
      if not test:
1186
1187
        vgstatus = utils.CheckVolumeGroupSize(vglist, vg_name,
                                              constants.MIN_VG_SIZE)
1188
        _ErrorIf(vgstatus, self.ENODELVM, node, vgstatus)
Iustin Pop's avatar
Iustin Pop committed
1189
1190
1191

    # checks config file checksum

1192
    remote_cksum = node_result.get(constants.NV_FILELIST, None)
1193
1194
1195
1196
    test = not isinstance(remote_cksum, dict)
    _ErrorIf(test, self.ENODEFILECHECK, node,
             "node hasn't returned file checksum data")
    if not test:
Iustin Pop's avatar
Iustin Pop committed
1197
      for file_name in file_list:
1198
        node_is_mc = nodeinfo.master_candidate
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
        must_have = (file_name not in master_files) or node_is_mc
        # missing
        test1 = file_name not in remote_cksum
        # invalid checksum
        test2 = not test1 and remote_cksum[file_name] != local_cksum[file_name]
        # existing and good
        test3 = not test1 and remote_cksum[file_name] == local_cksum[file_name]
        _ErrorIf(test1 and must_have, self.ENODEFILECHECK, node,
                 "file '%s' missing", file_name)
        _ErrorIf(test2 and must_have, self.ENODEFILECHECK, node,
                 "file '%s' has wrong checksum", file_name)
        # not candidate and this is not a must-have file
        _ErrorIf(test2 and not must_have, self.ENODEFILECHECK, node,
                 "file '%s' should not exist on non master"
                 " candidates (and the file is outdated)", file_name)
        # all good, except non-master/non-must have combination
        _ErrorIf(test3 and not must_have, self.ENODEFILECHECK, node,
                 "file '%s' should not exist"
                 " on non master candidates", file_name)
Iustin Pop's avatar
Iustin Pop committed
1218

1219
1220
    # checks ssh to any

1221
1222
1223
1224
    test = constants.NV_NODELIST not in node_result
    _ErrorIf(test, self.ENODESSH, node,
             "node hasn't returned node ssh connectivity data")
    if not test:
1225
      if node_result[constants.NV_NODELIST]:
1226
        for a_node, a_msg in node_result[constants.NV_NODELIST].items():
1227
1228
          _ErrorIf(True, self.ENODESSH, node,
                   "ssh communication with node '%s': %s", a_node, a_msg)
1229

1230
1231
1232
1233
    test = constants.NV_NODENETTEST not in node_result
    _ErrorIf(test, self.ENODENET, node,
             "node hasn't returned node tcp connectivity data")
    if not test:
1234
1235
      if node_result[constants.NV_NODENETTEST]:
        nlist = utils.NiceSort(node_result[constants.NV_NODENETTEST].keys())
1236
        for anode in nlist:
1237
1238
1239
          _ErrorIf(True, self.ENODENET, node,
                   "tcp communication with node '%s': %s",
                   anode, node_result[constants.NV_NODENETTEST][anode])
1240

1241
    hyp_result = node_result.get(constants.NV_HYPERVISOR, None)
1242
1243
    if isinstance(hyp_result, dict):
      for hv_name, hv_result in hyp_result.iteritems():
1244
1245
1246
        test = hv_result is not None
        _ErrorIf(test, self.ENODEHV, node,
                 "hypervisor %s verify failure: '%s'", hv_name, hv_result)
1247
1248

    # check used drbd list
1249
1250
    if vg_name is not None:
      used_minors = node_result.get(constants.NV_DRBDLIST, [])
1251
1252
1253
1254
      test = not isinstance(used_minors, (tuple, list))
      _ErrorIf(test, self.ENODEDRBD, node,
               "cannot parse drbd status file: %s", str(used_minors))
      if not test:
1255
        for minor, (iname, must_exist) in drbd_map.items():
1256
1257
1258
1259
          test = minor not in used_minors and must_exist
          _ErrorIf(test, self.ENODEDRBD, node,
                   "drbd minor %d of instance %s is not active",
                   minor, iname)
1260
        for minor in used_minors:
1261
1262
1263
          test = minor not in drbd_map
          _ErrorIf(test, self.ENODEDRBD, node,
                   "unallocated drbd minor %d is in use", minor)
1264
1265
1266
1267
    test = node_result.get(constants.NV_NODESETUP,
                           ["Missing NODESETUP results"])
    _ErrorIf(test, self.ENODESETUP, node, "node setup error: %s",
             "; ".join(test))
Iustin Pop's avatar
Iustin Pop committed
1268

1269
1270
1271
1272
1273
1274
1275
1276
1277
    # check pv names
    if vg_name is not None:
      pvlist = node_result.get(constants.NV_PVLIST, None)
      test = pvlist is None
      _ErrorIf(test, self.ENODELVM, node, "Can't get PV list from node")
      if not test:
        # check that ':' is not present in PV names, since it's a
        # special character for lvcreate (denotes the range of PEs to
        # use on the PV)
1278
        for _, pvname, owner_vg in pvlist:
1279
1280
1281
1282
          test = ":" in pvname
          _ErrorIf(test, self.ENODELVM, node, "Invalid character ':' in PV"
                   " '%s' of VG '%s'", pvname, owner_vg)

1283
  def _VerifyInstance(self, instance, instanceconfig, node_vol_is,
1284
                      node_instance, n_offline):
Iustin Pop's avatar
Iustin Pop committed
1285
1286
1287
1288
1289
1290
    """Verify an instance.

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

    """
Iustin Pop's avatar
Iustin Pop committed
1291
    _ErrorIf = self._ErrorIf # pylint: disable-msg=C0103
Iustin Pop's avatar
Iustin Pop committed
1292
1293
1294
1295
1296
1297
    node_current = instanceconfig.primary_node

    node_vol_should = {}
    instanceconfig.MapLVsByNode(node_vol_should)

    for node in node_vol_should: