ganeti-noded 15.8 KB
Newer Older
Iustin Pop's avatar
Iustin Pop committed
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
#!/usr/bin/python
#

# Copyright (C) 2006, 2007 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.


"""Ganeti node daemon"""

24
25
26
# functions in this module need to have a given name structure, so:
# pylint: disable-msg=C0103

Iustin Pop's avatar
Iustin Pop committed
27
28
29
import os
import sys
import traceback
30
import errno
Iustin Pop's avatar
Iustin Pop committed
31
import logging
Iustin Pop's avatar
Iustin Pop committed
32
33
34
35
36
37
38
39
40
41

from optparse import OptionParser


from ganeti import backend
from ganeti import logger
from ganeti import constants
from ganeti import objects
from ganeti import errors
from ganeti import ssconf
42
from ganeti import http
43
from ganeti import utils
Iustin Pop's avatar
Iustin Pop committed
44

Iustin Pop's avatar
Iustin Pop committed
45
46
_EXIT_GANETI_NODED = False

Iustin Pop's avatar
Iustin Pop committed
47

48
class NodeDaemonRequestHandler(http.HTTPRequestHandler):
49
50
51
52
53
  """The server implementation.

  This class holds all methods exposed over the RPC interface.

  """
54
55
  def HandleRequest(self):
    """Handle a request.
Iustin Pop's avatar
Iustin Pop committed
56

57
    """
58
59
60
61
62
    global _EXIT_GANETI_NODED

    if self.command.upper() != "PUT":
      raise http.HTTPBadRequest()

Iustin Pop's avatar
Iustin Pop committed
63
64
65
66
    path = self.path
    if path.startswith("/"):
      path = path[1:]

67
68
69
    method = getattr(self, "perspective_%s" % path, None)
    if method is None:
      raise httperror.HTTPNotFound()
Iustin Pop's avatar
Iustin Pop committed
70

Iustin Pop's avatar
Iustin Pop committed
71
    try:
72
      return method(self.post_data)
73
74
    except errors.QuitGanetiException, err:
      _EXIT_GANETI_NODED = True
Iustin Pop's avatar
Iustin Pop committed
75
76
77

  # the new block devices  --------------------------

78
79
80
81
82
  @staticmethod
  def perspective_blockdev_create(params):
    """Create a block device.

    """
83
    bdev_s, size, owner, on_primary, info = params
84
    bdev = objects.Disk.FromDict(bdev_s)
Iustin Pop's avatar
Iustin Pop committed
85
86
    if bdev is None:
      raise ValueError("can't unserialize data!")
87
    return backend.CreateBlockDevice(bdev, size, owner, on_primary, info)
Iustin Pop's avatar
Iustin Pop committed
88

89
90
91
92
93
  @staticmethod
  def perspective_blockdev_remove(params):
    """Remove a block device.

    """
Iustin Pop's avatar
Iustin Pop committed
94
    bdev_s = params[0]
95
    bdev = objects.Disk.FromDict(bdev_s)
Iustin Pop's avatar
Iustin Pop committed
96
97
    return backend.RemoveBlockDevice(bdev)

Iustin Pop's avatar
Iustin Pop committed
98
99
100
101
102
103
104
105
  @staticmethod
  def perspective_blockdev_rename(params):
    """Remove a block device.

    """
    devlist = [(objects.Disk.FromDict(ds), uid) for ds, uid in params]
    return backend.RenameBlockDevices(devlist)

106
107
108
109
110
  @staticmethod
  def perspective_blockdev_assemble(params):
    """Assemble a block device.

    """
111
    bdev_s, owner, on_primary = params
112
    bdev = objects.Disk.FromDict(bdev_s)
Iustin Pop's avatar
Iustin Pop committed
113
114
    if bdev is None:
      raise ValueError("can't unserialize data!")
115
    return backend.AssembleBlockDevice(bdev, owner, on_primary)
Iustin Pop's avatar
Iustin Pop committed
116

117
118
119
120
121
  @staticmethod
  def perspective_blockdev_shutdown(params):
    """Shutdown a block device.

    """
Iustin Pop's avatar
Iustin Pop committed
122
    bdev_s = params[0]
123
    bdev = objects.Disk.FromDict(bdev_s)
Iustin Pop's avatar
Iustin Pop committed
124
125
126
127
    if bdev is None:
      raise ValueError("can't unserialize data!")
    return backend.ShutdownBlockDevice(bdev)

128
  @staticmethod
129
  def perspective_blockdev_addchildren(params):
130
131
132
133
134
135
    """Add a child to a mirror device.

    Note: this is only valid for mirror devices. It's the caller's duty
    to send a correct disk, otherwise we raise an error.

    """
Iustin Pop's avatar
Iustin Pop committed
136
    bdev_s, ndev_s = params
137
    bdev = objects.Disk.FromDict(bdev_s)
138
139
    ndevs = [objects.Disk.FromDict(disk_s) for disk_s in ndev_s]
    if bdev is None or ndevs.count(None) > 0:
Iustin Pop's avatar
Iustin Pop committed
140
      raise ValueError("can't unserialize data!")
141
    return backend.MirrorAddChildren(bdev, ndevs)
Iustin Pop's avatar
Iustin Pop committed
142

143
  @staticmethod
144
  def perspective_blockdev_removechildren(params):
145
146
147
148
149
150
    """Remove a child from a mirror device.

    This is only valid for mirror devices, of course. It's the callers
    duty to send a correct disk, otherwise we raise an error.

    """
Iustin Pop's avatar
Iustin Pop committed
151
    bdev_s, ndev_s = params
152
    bdev = objects.Disk.FromDict(bdev_s)
153
154
    ndevs = [objects.Disk.FromDict(disk_s) for disk_s in ndev_s]
    if bdev is None or ndevs.count(None) > 0:
Iustin Pop's avatar
Iustin Pop committed
155
      raise ValueError("can't unserialize data!")
156
    return backend.MirrorRemoveChildren(bdev, ndevs)
Iustin Pop's avatar
Iustin Pop committed
157

158
159
160
161
162
  @staticmethod
  def perspective_blockdev_getmirrorstatus(params):
    """Return the mirror status for a list of disks.

    """
163
    disks = [objects.Disk.FromDict(dsk_s)
Iustin Pop's avatar
Iustin Pop committed
164
165
166
            for dsk_s in params]
    return backend.GetMirrorStatus(disks)

167
168
169
170
171
172
173
  @staticmethod
  def perspective_blockdev_find(params):
    """Expose the FindBlockDevice functionality for a disk.

    This will try to find but not activate a disk.

    """
174
    disk = objects.Disk.FromDict(params[0])
Iustin Pop's avatar
Iustin Pop committed
175
176
    return backend.FindBlockDevice(disk)

177
178
179
180
181
182
183
184
185
  @staticmethod
  def perspective_blockdev_snapshot(params):
    """Create a snapshot device.

    Note that this is only valid for LVM disks, if we get passed
    something else we raise an exception. The snapshot device can be
    remove by calling the generic block device remove call.

    """
186
    cfbd = objects.Disk.FromDict(params[0])
Iustin Pop's avatar
Iustin Pop committed
187
188
    return backend.SnapshotBlockDevice(cfbd)

189
190
191
192
193
194
195
196
197
  @staticmethod
  def perspective_blockdev_grow(params):
    """Grow a stack of devices.

    """
    cfbd = objects.Disk.FromDict(params[0])
    amount = params[1]
    return backend.GrowBlockDevice(cfbd, amount)

198
199
200
201
202
203
204
205
  @staticmethod
  def perspective_blockdev_close(params):
    """Closes the given block devices.

    """
    disks = [objects.Disk.FromDict(cf) for cf in params]
    return backend.CloseBlockDevices(disks)

Iustin Pop's avatar
Iustin Pop committed
206
207
  # export/import  --------------------------

208
209
210
211
212
  @staticmethod
  def perspective_snapshot_export(params):
    """Export a given snapshot.

    """
213
    disk = objects.Disk.FromDict(params[0])
Iustin Pop's avatar
Iustin Pop committed
214
    dest_node = params[1]
215
    instance = objects.Instance.FromDict(params[2])
216
217
218
219
220
    return backend.ExportSnapshot(disk, dest_node, instance)

  @staticmethod
  def perspective_finalize_export(params):
    """Expose the finalize export functionality.
Iustin Pop's avatar
Iustin Pop committed
221

222
    """
223
224
    instance = objects.Instance.FromDict(params[0])
    snap_disks = [objects.Disk.FromDict(str_data)
Iustin Pop's avatar
Iustin Pop committed
225
226
227
                  for str_data in params[1]]
    return backend.FinalizeExport(instance, snap_disks)

228
229
230
231
232
233
234
235
236
237
  @staticmethod
  def perspective_export_info(params):
    """Query information about an existing export on this node.

    The given path may not contain an export, in which case we return
    None.

    """
    path = params[0]
    einfo = backend.ExportInfo(path)
Iustin Pop's avatar
Iustin Pop committed
238
239
240
241
    if einfo is None:
      return einfo
    return einfo.Dumps()

242
243
244
245
246
247
248
249
250
  @staticmethod
  def perspective_export_list(params):
    """List the available exports on this node.

    Note that as opposed to export_info, which may query data about an
    export in any path, this only queries the standard Ganeti path
    (constants.EXPORT_DIR).

    """
Iustin Pop's avatar
Iustin Pop committed
251
252
    return backend.ListExports()

253
254
255
256
257
  @staticmethod
  def perspective_export_remove(params):
    """Remove an export.

    """
Iustin Pop's avatar
Iustin Pop committed
258
259
260
261
262
    export = params[0]
    return backend.RemoveExport(export)

  # volume  --------------------------

263
264
265
266
267
  @staticmethod
  def perspective_volume_list(params):
    """Query the list of logical volumes in a given volume group.

    """
Iustin Pop's avatar
Iustin Pop committed
268
269
270
    vgname = params[0]
    return backend.GetVolumeList(vgname)

271
272
273
274
275
  @staticmethod
  def perspective_vg_list(params):
    """Query the list of volume groups.

    """
Iustin Pop's avatar
Iustin Pop committed
276
277
278
279
    return backend.ListVolumeGroups()

  # bridge  --------------------------

280
281
282
283
284
  @staticmethod
  def perspective_bridges_exist(params):
    """Check if all bridges given exist on this node.

    """
Iustin Pop's avatar
Iustin Pop committed
285
286
287
288
289
    bridges_list = params[0]
    return backend.BridgesExist(bridges_list)

  # instance  --------------------------

290
291
292
293
294
  @staticmethod
  def perspective_instance_os_add(params):
    """Install an OS on a given instance.

    """
Iustin Pop's avatar
Iustin Pop committed
295
    inst_s, os_disk, swap_disk = params
296
    inst = objects.Instance.FromDict(inst_s)
Iustin Pop's avatar
Iustin Pop committed
297
298
    return backend.AddOSToInstance(inst, os_disk, swap_disk)

299
300
301
302
303
304
  @staticmethod
  def perspective_instance_run_rename(params):
    """Runs the OS rename script for an instance.

    """
    inst_s, old_name, os_disk, swap_disk = params
305
    inst = objects.Instance.FromDict(inst_s)
306
307
    return backend.RunRenameInstance(inst, old_name, os_disk, swap_disk)

308
309
310
311
312
  @staticmethod
  def perspective_instance_os_import(params):
    """Run the import function of an OS onto a given instance.

    """
Iustin Pop's avatar
Iustin Pop committed
313
    inst_s, os_disk, swap_disk, src_node, src_image = params
314
    inst = objects.Instance.FromDict(inst_s)
Iustin Pop's avatar
Iustin Pop committed
315
316
317
    return backend.ImportOSIntoInstance(inst, os_disk, swap_disk,
                                        src_node, src_image)

318
319
320
321
322
  @staticmethod
  def perspective_instance_shutdown(params):
    """Shutdown an instance.

    """
323
    instance = objects.Instance.FromDict(params[0])
Iustin Pop's avatar
Iustin Pop committed
324
325
    return backend.ShutdownInstance(instance)

326
327
328
329
330
  @staticmethod
  def perspective_instance_start(params):
    """Start an instance.

    """
331
    instance = objects.Instance.FromDict(params[0])
Iustin Pop's avatar
Iustin Pop committed
332
333
334
    extra_args = params[1]
    return backend.StartInstance(instance, extra_args)

335
336
337
338
339
340
341
342
  @staticmethod
  def perspective_instance_migrate(params):
    """Migrates an instance.

    """
    instance, target, live = params
    return backend.MigrateInstance(instance, target, live)

343
344
345
346
347
348
349
350
351
352
  @staticmethod
  def perspective_instance_reboot(params):
    """Reboot an instance.

    """
    instance = objects.Instance.FromDict(params[0])
    reboot_type = params[1]
    extra_args = params[2]
    return backend.RebootInstance(instance, reboot_type, extra_args)

353
354
355
356
357
  @staticmethod
  def perspective_instance_info(params):
    """Query instance information.

    """
Iustin Pop's avatar
Iustin Pop committed
358
359
    return backend.GetInstanceInfo(params[0])

360
361
362
363
364
  @staticmethod
  def perspective_all_instances_info(params):
    """Query information about all instances.

    """
Iustin Pop's avatar
Iustin Pop committed
365
366
    return backend.GetAllInstancesInfo()

367
368
369
370
371
  @staticmethod
  def perspective_instance_list(params):
    """Query the list of running instances.

    """
Iustin Pop's avatar
Iustin Pop committed
372
373
374
375
    return backend.GetInstanceList()

  # node --------------------------

376
377
378
379
380
  @staticmethod
  def perspective_node_tcp_ping(params):
    """Do a TcpPing on the remote node.

    """
381
382
    return utils.TcpPing(params[1], params[2], timeout=params[3],
                         live_port_needed=params[4], source=params[0])
383

384
385
386
387
388
  @staticmethod
  def perspective_node_info(params):
    """Query node information.

    """
Iustin Pop's avatar
Iustin Pop committed
389
390
391
    vgname = params[0]
    return backend.GetNodeInfo(vgname)

392
393
394
395
396
  @staticmethod
  def perspective_node_add(params):
    """Complete the registration of this node in the cluster.

    """
Iustin Pop's avatar
Iustin Pop committed
397
398
399
    return backend.AddNode(params[0], params[1], params[2],
                           params[3], params[4], params[5])

400
401
402
403
404
  @staticmethod
  def perspective_node_verify(params):
    """Run a verify sequence on this node.

    """
Iustin Pop's avatar
Iustin Pop committed
405
406
    return backend.VerifyNode(params[0])

407
408
409
410
411
  @staticmethod
  def perspective_node_start_master(params):
    """Promote this node to master status.

    """
Iustin Pop's avatar
Iustin Pop committed
412
413
    return backend.StartMaster()

414
415
416
417
418
  @staticmethod
  def perspective_node_stop_master(params):
    """Demote this node from master status.

    """
Iustin Pop's avatar
Iustin Pop committed
419
420
    return backend.StopMaster()

421
422
423
424
425
  @staticmethod
  def perspective_node_leave_cluster(params):
    """Cleanup after leaving a cluster.

    """
Iustin Pop's avatar
Iustin Pop committed
426
427
    return backend.LeaveCluster()

428
429
430
431
432
  @staticmethod
  def perspective_node_volumes(params):
    """Query the list of all logical volume groups.

    """
433
434
    return backend.NodeVolumes()

Iustin Pop's avatar
Iustin Pop committed
435
436
  # cluster --------------------------

437
438
439
440
441
  @staticmethod
  def perspective_version(params):
    """Query version information.

    """
Iustin Pop's avatar
Iustin Pop committed
442
443
    return constants.PROTOCOL_VERSION

444
445
446
447
448
449
450
451
  @staticmethod
  def perspective_upload_file(params):
    """Upload a file.

    Note that the backend implementation imposes strict rules on which
    files are accepted.

    """
Iustin Pop's avatar
Iustin Pop committed
452
453
454
455
456
    return backend.UploadFile(*params)


  # os -----------------------

457
458
459
460
461
  @staticmethod
  def perspective_os_diagnose(params):
    """Query detailed information about existing OSes.

    """
462
    return [os.ToDict() for os in backend.DiagnoseOS()]
Iustin Pop's avatar
Iustin Pop committed
463

464
465
466
467
468
  @staticmethod
  def perspective_os_get(params):
    """Query information about a given OS.

    """
Iustin Pop's avatar
Iustin Pop committed
469
470
    name = params[0]
    try:
471
      os_obj = backend.OSFromDisk(name)
Iustin Pop's avatar
Iustin Pop committed
472
    except errors.InvalidOS, err:
473
474
      os_obj = objects.OS.FromInvalidOS(err)
    return os_obj.ToDict()
Iustin Pop's avatar
Iustin Pop committed
475
476
477

  # hooks -----------------------

478
479
480
481
482
  @staticmethod
  def perspective_hooks_runner(params):
    """Run hook scripts.

    """
Iustin Pop's avatar
Iustin Pop committed
483
484
485
486
    hpath, phase, env = params
    hr = backend.HooksRunner()
    return hr.RunHooks(hpath, phase, env)

487
488
489
490
491
492
493
494
495
496
497
  # iallocator -----------------

  @staticmethod
  def perspective_iallocator_runner(params):
    """Run an iallocator script.

    """
    name, idata = params
    iar = backend.IAllocatorRunner()
    return iar.Run(name, idata)

498
499
500
501
502
503
504
505
506
507
  # test -----------------------

  @staticmethod
  def perspective_test_delay(params):
    """Run test delay.

    """
    duration = params[0]
    return utils.TestDelay(duration)

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
  @staticmethod
  def perspective_file_storage_dir_create(params):
    """Create the file storage directory.

    """
    file_storage_dir = params[0]
    return backend.CreateFileStorageDir(file_storage_dir)

  @staticmethod
  def perspective_file_storage_dir_remove(params):
    """Remove the file storage directory.

    """
    file_storage_dir = params[0]
    return backend.RemoveFileStorageDir(file_storage_dir)

  @staticmethod
  def perspective_file_storage_dir_rename(params):
    """Rename the file storage directory.

    """
    old_file_storage_dir = params[0]
    new_file_storage_dir = params[1]
    return backend.RenameFileStorageDir(old_file_storage_dir,
                                        new_file_storage_dir)

Iustin Pop's avatar
Iustin Pop committed
534

535
536
537
538
539
class NodeDaemonHttpServer(http.HTTPServer):
  def __init__(self, server_address):
    http.HTTPServer.__init__(self, server_address, NodeDaemonRequestHandler)


Iustin Pop's avatar
Iustin Pop committed
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
def ParseOptions():
  """Parse the command line options.

  Returns:
    (options, args) as from OptionParser.parse_args()

  """
  parser = OptionParser(description="Ganeti node daemon",
                        usage="%prog [-f] [-d]",
                        version="%%prog (ganeti) %s" %
                        constants.RELEASE_VERSION)

  parser.add_option("-f", "--foreground", dest="fork",
                    help="Don't detach from the current terminal",
                    default=True, action="store_false")
  parser.add_option("-d", "--debug", dest="debug",
                    help="Enable some debug messages",
                    default=False, action="store_true")
  options, args = parser.parse_args()
  return options, args


def main():
563
564
565
  """Main function for the node daemon.

  """
Iustin Pop's avatar
Iustin Pop committed
566
  options, args = ParseOptions()
567
  utils.debug = options.debug
Iustin Pop's avatar
Iustin Pop committed
568
569
570
571
572
573
574
575
576
577
578
579
580
  for fname in (constants.SSL_CERT_FILE,):
    if not os.path.isfile(fname):
      print "config %s not there, will not run." % fname
      sys.exit(5)

  try:
    ss = ssconf.SimpleStore()
    port = ss.GetNodeDaemonPort()
    pwdata = ss.GetNodeDaemonPassword()
  except errors.ConfigurationError, err:
    print "Cluster configuration incomplete: '%s'" % str(err)
    sys.exit(5)

581
582
583
584
585
586
587
588
589
590
591
592
593
594
  # create the various SUB_RUN_DIRS, if not existing, so that we handle the
  # situation where RUN_DIR is tmpfs
  for dir_name in constants.SUB_RUN_DIRS:
    if not os.path.exists(dir_name):
      try:
        os.mkdir(dir_name, 0755)
      except EnvironmentError, err:
        if err.errno != errno.EEXIST:
          print ("Node setup wrong, cannot create directory %s: %s" %
                 (dir_name, err))
          sys.exit(5)
    if not os.path.isdir(dir_name):
      print ("Node setup wrong, %s is not a directory" % dir_name)
      sys.exit(5)
595

Iustin Pop's avatar
Iustin Pop committed
596
597
  # become a daemon
  if options.fork:
598
    utils.Daemonize(logfile=constants.LOG_NODESERVER)
Iustin Pop's avatar
Iustin Pop committed
599

Iustin Pop's avatar
Iustin Pop committed
600
601
  logger.SetupDaemon(logfile=constants.LOG_NODESERVER, debug=options.debug,
                     stderr_logging=not options.fork)
Iustin Pop's avatar
Iustin Pop committed
602
  logging.info("ganeti node daemon startup")
Iustin Pop's avatar
Iustin Pop committed
603

604
605
  global _EXIT_GANETI_NODED

606
  httpd = NodeDaemonHttpServer(('', port))
607
608
  while (not _EXIT_GANETI_NODED):
    httpd.handle_request()
Iustin Pop's avatar
Iustin Pop committed
609
610


611
if __name__ == '__main__':
Iustin Pop's avatar
Iustin Pop committed
612
  main()