query.py 28 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
#
#

# Copyright (C) 2010 Google Inc.
#
# 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.


"""Module for query operations"""

Michael Hanselmann's avatar
Michael Hanselmann committed
24
import logging
25
26
27
28
29
30
31
32
33
34
35
import operator
import re

from ganeti import constants
from ganeti import errors
from ganeti import utils
from ganeti import compat
from ganeti import objects
from ganeti import ht


Michael Hanselmann's avatar
Michael Hanselmann committed
36
37
38
39
40
(NQ_CONFIG,
 NQ_INST,
 NQ_LIVE,
 NQ_GROUP) = range(1, 5)

41
42
43
44
(IQ_CONFIG,
 IQ_LIVE,
 IQ_DISKUSAGE) = range(100, 103)

Michael Hanselmann's avatar
Michael Hanselmann committed
45

46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
FIELD_NAME_RE = re.compile(r"^[a-z0-9/._]+$")
TITLE_RE = re.compile(r"^[^\s]+$")

#: Verification function for each field type
_VERIFY_FN = {
  constants.QFT_UNKNOWN: ht.TNone,
  constants.QFT_TEXT: ht.TString,
  constants.QFT_BOOL: ht.TBool,
  constants.QFT_NUMBER: ht.TInt,
  constants.QFT_UNIT: ht.TInt,
  constants.QFT_TIMESTAMP: ht.TOr(ht.TInt, ht.TFloat),
  constants.QFT_OTHER: lambda _: True,
  }


def _GetUnknownField(ctx, item): # pylint: disable-msg=W0613
  """Gets the contents of an unknown field.

  """
  return (constants.QRFS_UNKNOWN, None)


def _GetQueryFields(fielddefs, selected):
  """Calculates the internal list of selected fields.

  Unknown fields are returned as L{constants.QFT_UNKNOWN}.

  @type fielddefs: dict
  @param fielddefs: Field definitions
  @type selected: list of strings
  @param selected: List of selected fields

  """
  result = []

  for name in selected:
    try:
      fdef = fielddefs[name]
    except KeyError:
      fdef = (_MakeField(name, name, constants.QFT_UNKNOWN),
              None, _GetUnknownField)

    assert len(fdef) == 3

    result.append(fdef)

  return result


def GetAllFields(fielddefs):
  """Extract L{objects.QueryFieldDefinition} from field definitions.

  @rtype: list of L{objects.QueryFieldDefinition}

  """
  return [fdef for (fdef, _, _) in fielddefs]


class Query:
  def __init__(self, fieldlist, selected):
    """Initializes this class.

    The field definition is a dictionary with the field's name as a key and a
    tuple containing, in order, the field definition object
    (L{objects.QueryFieldDefinition}, the data kind to help calling code
    collect data and a retrieval function. The retrieval function is called
    with two parameters, in order, the data container and the item in container
    (see L{Query.Query}).

    Users of this class can call L{RequestedData} before preparing the data
    container to determine what data is needed.

    @type fieldlist: dictionary
    @param fieldlist: Field definitions
    @type selected: list of strings
    @param selected: List of selected fields

    """
    self._fields = _GetQueryFields(fieldlist, selected)

  def RequestedData(self):
    """Gets requested kinds of data.

    @rtype: frozenset

    """
    return frozenset(datakind
                     for (_, datakind, _) in self._fields
                     if datakind is not None)

  def GetFields(self):
    """Returns the list of fields for this query.

    Includes unknown fields.

    @rtype: List of L{objects.QueryFieldDefinition}

    """
    return GetAllFields(self._fields)

  def Query(self, ctx):
    """Execute a query.

    @param ctx: Data container passed to field retrieval functions, must
      support iteration using C{__iter__}

    """
    result = [[fn(ctx, item) for (_, _, fn) in self._fields]
              for item in ctx]

    # Verify result
    if __debug__:
      for (idx, row) in enumerate(result):
        assert _VerifyResultRow(self._fields, row), \
               ("Inconsistent result for fields %s in row %s: %r" %
161
                (GetAllFields(self._fields), idx, row))
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211

    return result

  def OldStyleQuery(self, ctx):
    """Query with "old" query result format.

    See L{Query.Query} for arguments.

    """
    unknown = set(fdef.name
                  for (fdef, _, _) in self._fields
                  if fdef.kind == constants.QFT_UNKNOWN)
    if unknown:
      raise errors.OpPrereqError("Unknown output fields selected: %s" %
                                 (utils.CommaJoin(unknown), ),
                                 errors.ECODE_INVAL)

    return [[value for (_, value) in row]
            for row in self.Query(ctx)]


def _VerifyResultRow(fields, row):
  """Verifies the contents of a query result row.

  @type fields: list
  @param fields: Field definitions for result
  @type row: list of tuples
  @param row: Row data

  """
  return (len(row) == len(fields) and
          compat.all((status == constants.QRFS_NORMAL and
                      _VERIFY_FN[fdef.kind](value)) or
                     # Value for an abnormal status must be None
                     (status != constants.QRFS_NORMAL and value is None)
                     for ((status, value), (fdef, _, _)) in zip(row, fields)))


def _PrepareFieldList(fields):
  """Prepares field list for use by L{Query}.

  Converts the list to a dictionary and does some verification.

  @type fields: list of tuples; (L{objects.QueryFieldDefinition}, data kind,
    retrieval function)
  @param fields: List of fields
  @rtype: dict
  @return: Field dictionary for L{Query}

  """
212
213
214
215
  if __debug__:
    duplicates = utils.FindDuplicates(fdef.title.lower()
                                      for (fdef, _, _) in fields)
    assert not duplicates, "Duplicate title(s) found: %r" % duplicates
216
217
218
219
220
221
222
223
224
225

  result = {}

  for field in fields:
    (fdef, _, fn) = field

    assert fdef.name and fdef.title, "Name and title are required"
    assert FIELD_NAME_RE.match(fdef.name)
    assert TITLE_RE.match(fdef.title)
    assert callable(fn)
226
227
    assert fdef.name not in result, \
           "Duplicate field name '%s' found" % fdef.name
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246

    result[fdef.name] = field

  assert len(result) == len(fields)
  assert compat.all(name == fdef.name
                    for (name, (fdef, _, _)) in result.items())

  return result


def _MakeField(name, title, kind):
  """Wrapper for creating L{objects.QueryFieldDefinition} instances.

  @param name: Field name as a regular expression
  @param title: Human-readable title
  @param kind: Field type

  """
  return objects.QueryFieldDefinition(name=name, title=title, kind=kind)
Michael Hanselmann's avatar
Michael Hanselmann committed
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279


def _GetNodeRole(node, master_name):
  """Determine node role.

  @type node: L{objects.Node}
  @param node: Node object
  @type master_name: string
  @param master_name: Master node name

  """
  if node.name == master_name:
    return "M"
  elif node.master_candidate:
    return "C"
  elif node.drained:
    return "D"
  elif node.offline:
    return "O"
  else:
    return "R"


def _GetItemAttr(attr):
  """Returns a field function to return an attribute of the item.

  @param attr: Attribute name

  """
  getter = operator.attrgetter(attr)
  return lambda _, item: (constants.QRFS_NORMAL, getter(item))


280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
def _GetItemTimestamp(getter):
  """Returns function for getting timestamp of item.

  @type getter: callable
  @param getter: Function to retrieve timestamp attribute

  """
  def fn(_, item):
    """Returns a timestamp of item.

    """
    timestamp = getter(item)
    if timestamp is None:
      # Old configs might not have all timestamps
      return (constants.QRFS_UNAVAIL, None)
    else:
      return (constants.QRFS_NORMAL, timestamp)

  return fn


def _GetItemTimestampFields(datatype):
  """Returns common timestamp fields.

  @param datatype: Field data type for use by L{Query.RequestedData}

  """
  return [
    (_MakeField("ctime", "CTime", constants.QFT_TIMESTAMP), datatype,
     _GetItemTimestamp(operator.attrgetter("ctime"))),
    (_MakeField("mtime", "MTime", constants.QFT_TIMESTAMP), datatype,
     _GetItemTimestamp(operator.attrgetter("mtime"))),
    ]


Michael Hanselmann's avatar
Michael Hanselmann committed
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
class NodeQueryData:
  """Data container for node data queries.

  """
  def __init__(self, nodes, live_data, master_name, node_to_primary,
               node_to_secondary, groups):
    """Initializes this class.

    """
    self.nodes = nodes
    self.live_data = live_data
    self.master_name = master_name
    self.node_to_primary = node_to_primary
    self.node_to_secondary = node_to_secondary
    self.groups = groups

    # Used for individual rows
    self.curlive_data = None

  def __iter__(self):
    """Iterate over all nodes.

    This function has side-effects and only one instance of the resulting
    generator should be used at a time.

    """
    for node in self.nodes:
      if self.live_data:
        self.curlive_data = self.live_data.get(node.name, None)
      else:
        self.curlive_data = None
      yield node


#: Fields that are direct attributes of an L{objects.Node} object
_NODE_SIMPLE_FIELDS = {
  "drained": ("Drained", constants.QFT_BOOL),
  "master_candidate": ("MasterC", constants.QFT_BOOL),
  "master_capable": ("MasterCapable", constants.QFT_BOOL),
  "name": ("Node", constants.QFT_TEXT),
  "offline": ("Offline", constants.QFT_BOOL),
  "serial_no": ("SerialNo", constants.QFT_NUMBER),
  "uuid": ("UUID", constants.QFT_TEXT),
  "vm_capable": ("VMCapable", constants.QFT_BOOL),
  }


#: Fields requiring talking to the node
_NODE_LIVE_FIELDS = {
  "bootid": ("BootID", constants.QFT_TEXT, "bootid"),
  "cnodes": ("CNodes", constants.QFT_NUMBER, "cpu_nodes"),
  "csockets": ("CSockets", constants.QFT_NUMBER, "cpu_sockets"),
  "ctotal": ("CTotal", constants.QFT_NUMBER, "cpu_total"),
  "dfree": ("DFree", constants.QFT_UNIT, "vg_free"),
  "dtotal": ("DTotal", constants.QFT_UNIT, "vg_size"),
  "mfree": ("MFree", constants.QFT_UNIT, "memory_free"),
  "mnode": ("MNode", constants.QFT_UNIT, "memory_dom0"),
  "mtotal": ("MTotal", constants.QFT_UNIT, "memory_total"),
  }


def _GetNodeGroup(ctx, node):
  """Returns the name of a node's group.

  @type ctx: L{NodeQueryData}
  @type node: L{objects.Node}
  @param node: Node object

  """
  ng = ctx.groups.get(node.group, None)
  if ng is None:
    # Nodes always have a group, or the configuration is corrupt
    return (constants.QRFS_UNAVAIL, None)

  return (constants.QRFS_NORMAL, ng.name)


def _GetLiveNodeField(field, kind, ctx, _):
  """Gets the value of a "live" field from L{NodeQueryData}.

  @param field: Live field name
  @param kind: Data kind, one of L{constants.QFT_ALL}
  @type ctx: L{NodeQueryData}

  """
  if not ctx.curlive_data:
    return (constants.QRFS_NODATA, None)

  try:
    value = ctx.curlive_data[field]
  except KeyError:
    return (constants.QRFS_UNAVAIL, None)

  if kind == constants.QFT_TEXT:
    return (constants.QRFS_NORMAL, value)

  assert kind in (constants.QFT_NUMBER, constants.QFT_UNIT)

  # Try to convert into number
  try:
    return (constants.QRFS_NORMAL, int(value))
  except (ValueError, TypeError):
    logging.exception("Failed to convert node field '%s' (value %r) to int",
                      value, field)
    return (constants.QRFS_UNAVAIL, None)


def _BuildNodeFields():
  """Builds list of fields for node queries.

  """
  fields = [
    (_MakeField("pip", "PrimaryIP", constants.QFT_TEXT), NQ_CONFIG,
     lambda ctx, node: (constants.QRFS_NORMAL, node.primary_ip)),
    (_MakeField("sip", "SecondaryIP", constants.QFT_TEXT), NQ_CONFIG,
     lambda ctx, node: (constants.QRFS_NORMAL, node.secondary_ip)),
    (_MakeField("tags", "Tags", constants.QFT_OTHER), NQ_CONFIG,
     lambda ctx, node: (constants.QRFS_NORMAL, list(node.GetTags()))),
    (_MakeField("master", "IsMaster", constants.QFT_BOOL), NQ_CONFIG,
     lambda ctx, node: (constants.QRFS_NORMAL, node.name == ctx.master_name)),
    (_MakeField("role", "Role", constants.QFT_TEXT), NQ_CONFIG,
     lambda ctx, node: (constants.QRFS_NORMAL,
                        _GetNodeRole(node, ctx.master_name))),
    (_MakeField("group", "Group", constants.QFT_TEXT), NQ_GROUP, _GetNodeGroup),
    (_MakeField("group.uuid", "GroupUUID", constants.QFT_TEXT),
     NQ_CONFIG, lambda ctx, node: (constants.QRFS_NORMAL, node.group)),
    ]

  def _GetLength(getter):
    return lambda ctx, node: (constants.QRFS_NORMAL,
                              len(getter(ctx)[node.name]))

  def _GetList(getter):
    return lambda ctx, node: (constants.QRFS_NORMAL,
                              list(getter(ctx)[node.name]))

  # Add fields operating on instance lists
  for prefix, titleprefix, getter in \
      [("p", "Pri", operator.attrgetter("node_to_primary")),
       ("s", "Sec", operator.attrgetter("node_to_secondary"))]:
    fields.extend([
      (_MakeField("%sinst_cnt" % prefix, "%sinst" % prefix.upper(),
                  constants.QFT_NUMBER),
       NQ_INST, _GetLength(getter)),
      (_MakeField("%sinst_list" % prefix, "%sInstances" % titleprefix,
                  constants.QFT_OTHER),
       NQ_INST, _GetList(getter)),
      ])

  # Add simple fields
  fields.extend([(_MakeField(name, title, kind), NQ_CONFIG, _GetItemAttr(name))
                 for (name, (title, kind)) in _NODE_SIMPLE_FIELDS.items()])

  # Add fields requiring live data
  fields.extend([
    (_MakeField(name, title, kind), NQ_LIVE,
     compat.partial(_GetLiveNodeField, nfield, kind))
    for (name, (title, kind, nfield)) in _NODE_LIVE_FIELDS.items()
    ])

475
476
477
  # Add timestamps
  fields.extend(_GetItemTimestampFields(NQ_CONFIG))

Michael Hanselmann's avatar
Michael Hanselmann committed
478
479
480
  return _PrepareFieldList(fields)


481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
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
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
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
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
class InstanceQueryData:
  """Data container for instance data queries.

  """
  def __init__(self, instances, cluster, disk_usage, offline_nodes, bad_nodes,
               live_data):
    """Initializes this class.

    @param instances: List of instance objects
    @param cluster: Cluster object
    @type disk_usage: dict; instance name as key
    @param disk_usage: Per-instance disk usage
    @type offline_nodes: list of strings
    @param offline_nodes: List of offline nodes
    @type bad_nodes: list of strings
    @param bad_nodes: List of faulty nodes
    @type live_data: dict; instance name as key
    @param live_data: Per-instance live data

    """
    assert len(set(bad_nodes) & set(offline_nodes)) == len(offline_nodes), \
           "Offline nodes not included in bad nodes"
    assert not (set(live_data.keys()) & set(bad_nodes)), \
           "Found live data for bad or offline nodes"

    self.instances = instances
    self.cluster = cluster
    self.disk_usage = disk_usage
    self.offline_nodes = offline_nodes
    self.bad_nodes = bad_nodes
    self.live_data = live_data

    # Used for individual rows
    self.inst_hvparams = None
    self.inst_beparams = None
    self.inst_nicparams = None

  def __iter__(self):
    """Iterate over all instances.

    This function has side-effects and only one instance of the resulting
    generator should be used at a time.

    """
    for inst in self.instances:
      self.inst_hvparams = self.cluster.FillHV(inst, skip_globals=True)
      self.inst_beparams = self.cluster.FillBE(inst)
      self.inst_nicparams = [self.cluster.SimpleFillNIC(nic.nicparams)
                             for nic in inst.nics]

      yield inst


def _GetInstOperState(ctx, inst):
  """Get instance's operational status.

  @type ctx: L{InstanceQueryData}
  @type inst: L{objects.Instance}
  @param inst: Instance object

  """
  if inst.primary_node in ctx.bad_nodes:
    return (constants.QRFS_NODATA, None)
  else:
    return (constants.QRFS_NORMAL, bool(ctx.live_data.get(inst.name)))


def _GetInstLiveData(name):
  """Build function for retrieving live data.

  @type name: string
  @param name: Live data field name

  """
  def fn(ctx, inst):
    """Get live data for an instance.

    @type ctx: L{InstanceQueryData}
    @type inst: L{objects.Instance}
    @param inst: Instance object

    """
    if (inst.primary_node in ctx.bad_nodes or
        inst.primary_node in ctx.offline_nodes):
      return (constants.QRFS_NODATA, None)

    if inst.name in ctx.live_data:
      data = ctx.live_data[inst.name]
      if name in data:
        return (constants.QRFS_NORMAL, data[name])

    return (constants.QRFS_UNAVAIL, None)

  return fn


def _GetInstStatus(ctx, inst):
  """Get instance status.

  @type ctx: L{InstanceQueryData}
  @type inst: L{objects.Instance}
  @param inst: Instance object

  """
  if inst.primary_node in ctx.offline_nodes:
    return (constants.QRFS_NORMAL, "ERROR_nodeoffline")

  if inst.primary_node in ctx.bad_nodes:
    return (constants.QRFS_NORMAL, "ERROR_nodedown")

  if bool(ctx.live_data.get(inst.name)):
    if inst.admin_up:
      return (constants.QRFS_NORMAL, "running")
    else:
      return (constants.QRFS_NORMAL, "ERROR_up")

  if inst.admin_up:
    return (constants.QRFS_NORMAL, "ERROR_down")

  return (constants.QRFS_NORMAL, "ADMIN_down")


def _GetInstDiskSize(index):
  """Build function for retrieving disk size.

  @type index: int
  @param index: Disk index

  """
  def fn(_, inst):
    """Get size of a disk.

    @type inst: L{objects.Instance}
    @param inst: Instance object

    """
    try:
      return (constants.QRFS_NORMAL, inst.disks[index].size)
    except IndexError:
      return (constants.QRFS_UNAVAIL, None)

  return fn


def _GetInstNic(index, cb):
  """Build function for calling another function with an instance NIC.

  @type index: int
  @param index: NIC index
  @type cb: callable
  @param cb: Callback

  """
  def fn(ctx, inst):
    """Call helper function with instance NIC.

    @type ctx: L{InstanceQueryData}
    @type inst: L{objects.Instance}
    @param inst: Instance object

    """
    try:
      nic = inst.nics[index]
    except IndexError:
      return (constants.QRFS_UNAVAIL, None)

    return cb(ctx, index, nic)

  return fn


def _GetInstNicIp(ctx, _, nic): # pylint: disable-msg=W0613
  """Get a NIC's IP address.

  @type ctx: L{InstanceQueryData}
  @type nic: L{objects.NIC}
  @param nic: NIC object

  """
  if nic.ip is None:
    return (constants.QRFS_UNAVAIL, None)
  else:
    return (constants.QRFS_NORMAL, nic.ip)


def _GetInstNicBridge(ctx, index, _):
  """Get a NIC's bridge.

  @type ctx: L{InstanceQueryData}
  @type index: int
  @param index: NIC index

  """
  assert len(ctx.inst_nicparams) >= index

  nicparams = ctx.inst_nicparams[index]

  if nicparams[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
    return (constants.QRFS_NORMAL, nicparams[constants.NIC_LINK])
  else:
    return (constants.QRFS_UNAVAIL, None)


def _GetInstAllNicBridges(ctx, inst):
  """Get all network bridges for an instance.

  @type ctx: L{InstanceQueryData}
  @type inst: L{objects.Instance}
  @param inst: Instance object

  """
  assert len(ctx.inst_nicparams) == len(inst.nics)

  result = []

  for nicp in ctx.inst_nicparams:
    if nicp[constants.NIC_MODE] == constants.NIC_MODE_BRIDGED:
      result.append(nicp[constants.NIC_LINK])
    else:
      result.append(None)

  assert len(result) == len(inst.nics)

  return (constants.QRFS_NORMAL, result)


def _GetInstNicParam(name):
  """Build function for retrieving a NIC parameter.

  @type name: string
  @param name: Parameter name

  """
  def fn(ctx, index, _):
    """Get a NIC's bridge.

    @type ctx: L{InstanceQueryData}
    @type inst: L{objects.Instance}
    @param inst: Instance object
    @type nic: L{objects.NIC}
    @param nic: NIC object

    """
    assert len(ctx.inst_nicparams) >= index
    return (constants.QRFS_NORMAL, ctx.inst_nicparams[index][name])

  return fn


def _GetInstanceNetworkFields():
  """Get instance fields involving network interfaces.

  @return: List of field definitions used as input for L{_PrepareFieldList}

  """
  nic_mac_fn = lambda ctx, _, nic: (constants.QRFS_NORMAL, nic.mac)
  nic_mode_fn = _GetInstNicParam(constants.NIC_MODE)
  nic_link_fn = _GetInstNicParam(constants.NIC_LINK)

  fields = [
    # First NIC (legacy)
    (_MakeField("ip", "IP_address", constants.QFT_TEXT), IQ_CONFIG,
     _GetInstNic(0, _GetInstNicIp)),
    (_MakeField("mac", "MAC_address", constants.QFT_TEXT), IQ_CONFIG,
     _GetInstNic(0, nic_mac_fn)),
    (_MakeField("bridge", "Bridge", constants.QFT_TEXT), IQ_CONFIG,
     _GetInstNic(0, _GetInstNicBridge)),
    (_MakeField("nic_mode", "NIC_Mode", constants.QFT_TEXT), IQ_CONFIG,
     _GetInstNic(0, nic_mode_fn)),
    (_MakeField("nic_link", "NIC_Link", constants.QFT_TEXT), IQ_CONFIG,
     _GetInstNic(0, nic_link_fn)),

    # All NICs
    (_MakeField("nic.count", "NICs", constants.QFT_NUMBER), IQ_CONFIG,
     lambda ctx, inst: (constants.QRFS_NORMAL, len(inst.nics))),
    (_MakeField("nic.macs", "NIC_MACs", constants.QFT_OTHER), IQ_CONFIG,
     lambda ctx, inst: (constants.QRFS_NORMAL, [nic.mac for nic in inst.nics])),
    (_MakeField("nic.ips", "NIC_IPs", constants.QFT_OTHER), IQ_CONFIG,
     lambda ctx, inst: (constants.QRFS_NORMAL, [nic.ip for nic in inst.nics])),
    (_MakeField("nic.modes", "NIC_modes", constants.QFT_OTHER), IQ_CONFIG,
     lambda ctx, inst: (constants.QRFS_NORMAL,
                        [nicp[constants.NIC_MODE]
                         for nicp in ctx.inst_nicparams])),
    (_MakeField("nic.links", "NIC_links", constants.QFT_OTHER), IQ_CONFIG,
     lambda ctx, inst: (constants.QRFS_NORMAL,
                        [nicp[constants.NIC_LINK]
                         for nicp in ctx.inst_nicparams])),
    (_MakeField("nic.bridges", "NIC_bridges", constants.QFT_OTHER), IQ_CONFIG,
     _GetInstAllNicBridges),
    ]

  # NICs by number
  for i in range(constants.MAX_NICS):
    fields.extend([
      (_MakeField("nic.ip/%s" % i, "NicIP/%s" % i, constants.QFT_TEXT),
       IQ_CONFIG, _GetInstNic(i, _GetInstNicIp)),
      (_MakeField("nic.mac/%s" % i, "NicMAC/%s" % i, constants.QFT_TEXT),
       IQ_CONFIG, _GetInstNic(i, nic_mac_fn)),
      (_MakeField("nic.mode/%s" % i, "NicMode/%s" % i, constants.QFT_TEXT),
       IQ_CONFIG, _GetInstNic(i, nic_mode_fn)),
      (_MakeField("nic.link/%s" % i, "NicLink/%s" % i, constants.QFT_TEXT),
       IQ_CONFIG, _GetInstNic(i, nic_link_fn)),
      (_MakeField("nic.bridge/%s" % i, "NicBridge/%s" % i, constants.QFT_TEXT),
       IQ_CONFIG, _GetInstNic(i, _GetInstNicBridge)),
      ])

  return fields


def _GetInstDiskUsage(ctx, inst):
  """Get disk usage for an instance.

  @type ctx: L{InstanceQueryData}
  @type inst: L{objects.Instance}
  @param inst: Instance object

  """
  usage = ctx.disk_usage[inst.name]

  if usage is None:
    usage = 0

  return (constants.QRFS_NORMAL, usage)


def _GetInstanceDiskFields():
  """Get instance fields involving disks.

  @return: List of field definitions used as input for L{_PrepareFieldList}

  """
  fields = [
    (_MakeField("disk_usage", "DiskUsage", constants.QFT_UNIT), IQ_DISKUSAGE,
     _GetInstDiskUsage),
    (_MakeField("sda_size", "LegacyDisk/0", constants.QFT_UNIT), IQ_CONFIG,
     _GetInstDiskSize(0)),
    (_MakeField("sdb_size", "LegacyDisk/1", constants.QFT_UNIT), IQ_CONFIG,
     _GetInstDiskSize(1)),
    (_MakeField("disk.count", "Disks", constants.QFT_NUMBER), IQ_CONFIG,
     lambda ctx, inst: (constants.QRFS_NORMAL, len(inst.disks))),
    (_MakeField("disk.sizes", "Disk_sizes", constants.QFT_OTHER), IQ_CONFIG,
     lambda ctx, inst: (constants.QRFS_NORMAL,
                        [disk.size for disk in inst.disks])),
    ]

  # Disks by number
  fields.extend([
    (_MakeField("disk.size/%s" % i, "Disk/%s" % i, constants.QFT_UNIT),
     IQ_CONFIG, _GetInstDiskSize(i))
    for i in range(constants.MAX_DISKS)
    ])

  return fields


def _GetInstanceParameterFields():
  """Get instance fields involving parameters.

  @return: List of field definitions used as input for L{_PrepareFieldList}

  """
  # TODO: Consider moving titles closer to constants
  be_title = {
    constants.BE_AUTO_BALANCE: "Auto_balance",
    constants.BE_MEMORY: "Configured_memory",
    constants.BE_VCPUS: "VCPUs",
    }

  hv_title = {
    constants.HV_ACPI: "ACPI",
    constants.HV_BOOT_ORDER: "Boot_order",
    constants.HV_CDROM_IMAGE_PATH: "CDROM_image_path",
    constants.HV_DISK_TYPE: "Disk_type",
    constants.HV_INITRD_PATH: "Initrd_path",
    constants.HV_KERNEL_PATH: "Kernel_path",
    constants.HV_NIC_TYPE: "NIC_type",
    constants.HV_PAE: "PAE",
    constants.HV_VNC_BIND_ADDRESS: "VNC_bind_address",
    }

  fields = [
    # Filled parameters
    (_MakeField("hvparams", "HypervisorParameters", constants.QFT_OTHER),
     IQ_CONFIG, lambda ctx, _: (constants.QRFS_NORMAL, ctx.inst_hvparams)),
    (_MakeField("beparams", "BackendParameters", constants.QFT_OTHER),
     IQ_CONFIG, lambda ctx, _: (constants.QRFS_NORMAL, ctx.inst_beparams)),
    (_MakeField("vcpus", "LegacyVCPUs", constants.QFT_NUMBER), IQ_CONFIG,
     lambda ctx, _: (constants.QRFS_NORMAL,
                     ctx.inst_beparams[constants.BE_VCPUS])),

    # Unfilled parameters
    (_MakeField("custom_hvparams", "CustomHypervisorParameters",
                constants.QFT_OTHER),
     IQ_CONFIG, lambda ctx, inst: (constants.QRFS_NORMAL, inst.hvparams)),
    (_MakeField("custom_beparams", "CustomBackendParameters",
                constants.QFT_OTHER),
     IQ_CONFIG, lambda ctx, inst: (constants.QRFS_NORMAL, inst.beparams)),
    (_MakeField("custom_nicparams", "CustomNicParameters",
                constants.QFT_OTHER),
     IQ_CONFIG, lambda ctx, inst: (constants.QRFS_NORMAL,
                                   [nic.nicparams for nic in inst.nics])),
    ]

  # HV params
  def _GetInstHvParam(name):
    return lambda ctx, _: (constants.QRFS_NORMAL,
                           ctx.inst_hvparams.get(name, None))

  fields.extend([
    # For now all hypervisor parameters are exported as QFT_OTHER
    (_MakeField("hv/%s" % name, hv_title.get(name, "hv/%s" % name),
                constants.QFT_OTHER),
     IQ_CONFIG, _GetInstHvParam(name))
    for name in constants.HVS_PARAMETERS
    if name not in constants.HVC_GLOBALS
    ])

  # BE params
  def _GetInstBeParam(name):
    return lambda ctx, _: (constants.QRFS_NORMAL,
                           ctx.inst_beparams.get(name, None))

  fields.extend([
    # For now all backend parameters are exported as QFT_OTHER
    (_MakeField("be/%s" % name, be_title.get(name, "be/%s" % name),
                constants.QFT_OTHER),
     IQ_CONFIG, _GetInstBeParam(name))
    for name in constants.BES_PARAMETERS
    ])

  return fields


_INST_SIMPLE_FIELDS = {
  "disk_template": ("Disk_template", constants.QFT_TEXT),
  "hypervisor": ("Hypervisor", constants.QFT_TEXT),
  "name": ("Node", constants.QFT_TEXT),
  # Depending on the hypervisor, the port can be None
  "network_port": ("Network_port", constants.QFT_OTHER),
  "os": ("OS", constants.QFT_TEXT),
  "serial_no": ("SerialNo", constants.QFT_NUMBER),
  "uuid": ("UUID", constants.QFT_TEXT),
  }


def _BuildInstanceFields():
  """Builds list of fields for instance queries.

  """
  fields = [
    (_MakeField("pnode", "Primary_node", constants.QFT_TEXT), IQ_CONFIG,
     lambda ctx, inst: (constants.QRFS_NORMAL, inst.primary_node)),
    (_MakeField("snodes", "Secondary_Nodes", constants.QFT_OTHER), IQ_CONFIG,
     lambda ctx, inst: (constants.QRFS_NORMAL, list(inst.secondary_nodes))),
    (_MakeField("admin_state", "Autostart", constants.QFT_BOOL), IQ_CONFIG,
     lambda ctx, inst: (constants.QRFS_NORMAL, inst.admin_up)),
    (_MakeField("tags", "Tags", constants.QFT_OTHER), IQ_CONFIG,
     lambda ctx, inst: (constants.QRFS_NORMAL, list(inst.GetTags()))),
    ]

  # Add simple fields
  fields.extend([(_MakeField(name, title, kind), IQ_CONFIG, _GetItemAttr(name))
                 for (name, (title, kind)) in _INST_SIMPLE_FIELDS.items()])

  # Fields requiring talking to the node
  fields.extend([
    (_MakeField("oper_state", "Running", constants.QFT_BOOL), IQ_LIVE,
     _GetInstOperState),
    (_MakeField("oper_ram", "RuntimeMemory", constants.QFT_UNIT), IQ_LIVE,
     _GetInstLiveData("memory")),
    (_MakeField("oper_vcpus", "RuntimeVCPUs", constants.QFT_NUMBER), IQ_LIVE,
     _GetInstLiveData("vcpus")),
    (_MakeField("status", "Status", constants.QFT_TEXT), IQ_LIVE,
     _GetInstStatus),
    ])

  fields.extend(_GetInstanceParameterFields())
  fields.extend(_GetInstanceDiskFields())
  fields.extend(_GetInstanceNetworkFields())
960
  fields.extend(_GetItemTimestampFields(IQ_CONFIG))
961
962
963
964

  return _PrepareFieldList(fields)


Michael Hanselmann's avatar
Michael Hanselmann committed
965
966
#: Fields available for node queries
NODE_FIELDS = _BuildNodeFields()
967
968
969

#: Fields available for instance queries
INSTANCE_FIELDS = _BuildInstanceFields()