4 # Copyright (C) 2006, 2007 Google Inc.
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 2 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful, but
12 # WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 # General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program; if not, write to the Free Software
18 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
22 """Ganeti node daemon"""
24 # functions in this module need to have a given name structure, so:
25 # pylint: disable-msg=C0103
35 from optparse import OptionParser
37 from ganeti import backend
38 from ganeti import constants
39 from ganeti import objects
40 from ganeti import errors
41 from ganeti import jstore
42 from ganeti import daemon
43 from ganeti import http
44 from ganeti import utils
46 import ganeti.http.server
52 def _RequireJobQueueLock(fn):
53 """Decorator for job queue manipulating functions.
56 QUEUE_LOCK_TIMEOUT = 10
58 def wrapper(*args, **kwargs):
59 # Locking in exclusive, blocking mode because there could be several
60 # children running at the same time. Waiting up to 10 seconds.
61 queue_lock.Exclusive(blocking=True, timeout=QUEUE_LOCK_TIMEOUT)
63 return fn(*args, **kwargs)
70 class NodeHttpServer(http.server.HttpServer):
71 """The server implementation.
73 This class holds all methods exposed over the RPC interface.
76 def __init__(self, *args, **kwargs):
77 http.server.HttpServer.__init__(self, *args, **kwargs)
78 self.noded_pid = os.getpid()
80 def HandleRequest(self, req):
84 if req.request_method.upper() != http.HTTP_PUT:
85 raise http.HttpBadRequest()
87 path = req.request_path
88 if path.startswith("/"):
91 method = getattr(self, "perspective_%s" % path, None)
93 raise http.HttpNotFound()
97 return method(req.request_body)
99 logging.exception("Error in RPC call")
101 except errors.QuitGanetiException, err:
102 # Tell parent to quit
103 os.kill(self.noded_pid, signal.SIGTERM)
105 # the new block devices --------------------------
108 def perspective_blockdev_create(params):
109 """Create a block device.
112 bdev_s, size, owner, on_primary, info = params
113 bdev = objects.Disk.FromDict(bdev_s)
115 raise ValueError("can't unserialize data!")
116 return backend.CreateBlockDevice(bdev, size, owner, on_primary, info)
119 def perspective_blockdev_remove(params):
120 """Remove a block device.
124 bdev = objects.Disk.FromDict(bdev_s)
125 return backend.RemoveBlockDevice(bdev)
128 def perspective_blockdev_rename(params):
129 """Remove a block device.
132 devlist = [(objects.Disk.FromDict(ds), uid) for ds, uid in params]
133 return backend.RenameBlockDevices(devlist)
136 def perspective_blockdev_assemble(params):
137 """Assemble a block device.
140 bdev_s, owner, on_primary = params
141 bdev = objects.Disk.FromDict(bdev_s)
143 raise ValueError("can't unserialize data!")
144 return backend.AssembleBlockDevice(bdev, owner, on_primary)
147 def perspective_blockdev_shutdown(params):
148 """Shutdown a block device.
152 bdev = objects.Disk.FromDict(bdev_s)
154 raise ValueError("can't unserialize data!")
155 return backend.ShutdownBlockDevice(bdev)
158 def perspective_blockdev_addchildren(params):
159 """Add a child to a mirror device.
161 Note: this is only valid for mirror devices. It's the caller's duty
162 to send a correct disk, otherwise we raise an error.
165 bdev_s, ndev_s = params
166 bdev = objects.Disk.FromDict(bdev_s)
167 ndevs = [objects.Disk.FromDict(disk_s) for disk_s in ndev_s]
168 if bdev is None or ndevs.count(None) > 0:
169 raise ValueError("can't unserialize data!")
170 return backend.MirrorAddChildren(bdev, ndevs)
173 def perspective_blockdev_removechildren(params):
174 """Remove a child from a mirror device.
176 This is only valid for mirror devices, of course. It's the callers
177 duty to send a correct disk, otherwise we raise an error.
180 bdev_s, ndev_s = params
181 bdev = objects.Disk.FromDict(bdev_s)
182 ndevs = [objects.Disk.FromDict(disk_s) for disk_s in ndev_s]
183 if bdev is None or ndevs.count(None) > 0:
184 raise ValueError("can't unserialize data!")
185 return backend.MirrorRemoveChildren(bdev, ndevs)
188 def perspective_blockdev_getmirrorstatus(params):
189 """Return the mirror status for a list of disks.
192 disks = [objects.Disk.FromDict(dsk_s)
194 return backend.GetMirrorStatus(disks)
197 def perspective_blockdev_find(params):
198 """Expose the FindBlockDevice functionality for a disk.
200 This will try to find but not activate a disk.
203 disk = objects.Disk.FromDict(params[0])
204 return backend.FindBlockDevice(disk)
207 def perspective_blockdev_snapshot(params):
208 """Create a snapshot device.
210 Note that this is only valid for LVM disks, if we get passed
211 something else we raise an exception. The snapshot device can be
212 remove by calling the generic block device remove call.
215 cfbd = objects.Disk.FromDict(params[0])
216 return backend.SnapshotBlockDevice(cfbd)
219 def perspective_blockdev_grow(params):
220 """Grow a stack of devices.
223 cfbd = objects.Disk.FromDict(params[0])
225 return backend.GrowBlockDevice(cfbd, amount)
228 def perspective_blockdev_close(params):
229 """Closes the given block devices.
232 disks = [objects.Disk.FromDict(cf) for cf in params[1]]
233 return backend.CloseBlockDevices(params[0], disks)
235 # blockdev/drbd specific methods ----------
238 def perspective_drbd_disconnect_net(params):
239 """Disconnects the network connection of drbd disks.
241 Note that this is only valid for drbd disks, so the members of the
242 disk list must all be drbd devices.
245 nodes_ip, disks = params
246 disks = [objects.Disk.FromDict(cf) for cf in disks]
247 return backend.DrbdDisconnectNet(nodes_ip, disks)
250 def perspective_drbd_attach_net(params):
251 """Attaches the network connection of drbd disks.
253 Note that this is only valid for drbd disks, so the members of the
254 disk list must all be drbd devices.
257 nodes_ip, disks, instance_name, multimaster = params
258 disks = [objects.Disk.FromDict(cf) for cf in disks]
259 return backend.DrbdAttachNet(nodes_ip, disks, instance_name, multimaster)
262 def perspective_drbd_wait_sync(params):
263 """Wait until DRBD disks are synched.
265 Note that this is only valid for drbd disks, so the members of the
266 disk list must all be drbd devices.
269 nodes_ip, disks = params
270 disks = [objects.Disk.FromDict(cf) for cf in disks]
271 return backend.DrbdWaitSync(nodes_ip, disks)
273 # export/import --------------------------
276 def perspective_snapshot_export(params):
277 """Export a given snapshot.
280 disk = objects.Disk.FromDict(params[0])
281 dest_node = params[1]
282 instance = objects.Instance.FromDict(params[2])
283 cluster_name = params[3]
285 return backend.ExportSnapshot(disk, dest_node, instance,
286 cluster_name, dev_idx)
289 def perspective_finalize_export(params):
290 """Expose the finalize export functionality.
293 instance = objects.Instance.FromDict(params[0])
294 snap_disks = [objects.Disk.FromDict(str_data)
295 for str_data in params[1]]
296 return backend.FinalizeExport(instance, snap_disks)
299 def perspective_export_info(params):
300 """Query information about an existing export on this node.
302 The given path may not contain an export, in which case we return
307 einfo = backend.ExportInfo(path)
313 def perspective_export_list(params):
314 """List the available exports on this node.
316 Note that as opposed to export_info, which may query data about an
317 export in any path, this only queries the standard Ganeti path
318 (constants.EXPORT_DIR).
321 return backend.ListExports()
324 def perspective_export_remove(params):
329 return backend.RemoveExport(export)
331 # volume --------------------------
334 def perspective_volume_list(params):
335 """Query the list of logical volumes in a given volume group.
339 return backend.GetVolumeList(vgname)
342 def perspective_vg_list(params):
343 """Query the list of volume groups.
346 return backend.ListVolumeGroups()
348 # bridge --------------------------
351 def perspective_bridges_exist(params):
352 """Check if all bridges given exist on this node.
355 bridges_list = params[0]
356 return backend.BridgesExist(bridges_list)
358 # instance --------------------------
361 def perspective_instance_os_add(params):
362 """Install an OS on a given instance.
366 inst = objects.Instance.FromDict(inst_s)
367 return backend.AddOSToInstance(inst)
370 def perspective_instance_run_rename(params):
371 """Runs the OS rename script for an instance.
374 inst_s, old_name = params
375 inst = objects.Instance.FromDict(inst_s)
376 return backend.RunRenameInstance(inst, old_name)
379 def perspective_instance_os_import(params):
380 """Run the import function of an OS onto a given instance.
383 inst_s, src_node, src_images, cluster_name = params
384 inst = objects.Instance.FromDict(inst_s)
385 return backend.ImportOSIntoInstance(inst, src_node, src_images,
389 def perspective_instance_shutdown(params):
390 """Shutdown an instance.
393 instance = objects.Instance.FromDict(params[0])
394 return backend.ShutdownInstance(instance)
397 def perspective_instance_start(params):
398 """Start an instance.
401 instance = objects.Instance.FromDict(params[0])
402 extra_args = params[1]
403 return backend.StartInstance(instance, extra_args)
406 def perspective_migration_info(params):
407 """Gather information about an instance to be migrated.
410 instance = objects.Instance.FromDict(params[0])
411 return backend.MigrationInfo(instance)
414 def perspective_accept_instance(params):
415 """Prepare the node to accept an instance.
418 instance, info, target = params
419 instance = objects.Instance.FromDict(instance)
420 return backend.AcceptInstance(instance, info, target)
423 def perspective_finalize_migration(params):
424 """Finalize the instance migration.
427 instance, info, success = params
428 instance = objects.Instance.FromDict(instance)
429 return backend.FinalizeMigration(instance, info, success)
432 def perspective_instance_migrate(params):
433 """Migrates an instance.
436 instance, target, live = params
437 instance = objects.Instance.FromDict(instance)
438 return backend.MigrateInstance(instance, target, live)
441 def perspective_instance_reboot(params):
442 """Reboot an instance.
445 instance = objects.Instance.FromDict(params[0])
446 reboot_type = params[1]
447 extra_args = params[2]
448 return backend.RebootInstance(instance, reboot_type, extra_args)
451 def perspective_instance_info(params):
452 """Query instance information.
455 return backend.GetInstanceInfo(params[0], params[1])
458 def perspective_instance_migratable(params):
459 """Query whether the specified instance can be migrated.
462 instance = objects.Instance.FromDict(params[0])
463 return backend.GetInstanceMigratable(instance)
466 def perspective_all_instances_info(params):
467 """Query information about all instances.
470 return backend.GetAllInstancesInfo(params[0])
473 def perspective_instance_list(params):
474 """Query the list of running instances.
477 return backend.GetInstanceList(params[0])
479 # node --------------------------
482 def perspective_node_tcp_ping(params):
483 """Do a TcpPing on the remote node.
486 return utils.TcpPing(params[1], params[2], timeout=params[3],
487 live_port_needed=params[4], source=params[0])
490 def perspective_node_has_ip_address(params):
491 """Checks if a node has the given ip address.
494 return utils.OwnIpAddress(params[0])
497 def perspective_node_info(params):
498 """Query node information.
501 vgname, hypervisor_type = params
502 return backend.GetNodeInfo(vgname, hypervisor_type)
505 def perspective_node_add(params):
506 """Complete the registration of this node in the cluster.
509 return backend.AddNode(params[0], params[1], params[2],
510 params[3], params[4], params[5])
513 def perspective_node_verify(params):
514 """Run a verify sequence on this node.
517 return backend.VerifyNode(params[0], params[1])
520 def perspective_node_start_master(params):
521 """Promote this node to master status.
524 return backend.StartMaster(params[0])
527 def perspective_node_stop_master(params):
528 """Demote this node from master status.
531 return backend.StopMaster(params[0])
534 def perspective_node_leave_cluster(params):
535 """Cleanup after leaving a cluster.
538 return backend.LeaveCluster()
541 def perspective_node_volumes(params):
542 """Query the list of all logical volume groups.
545 return backend.NodeVolumes()
548 def perspective_node_demote_from_mc(params):
549 """Demote a node from the master candidate role.
552 return backend.DemoteFromMC()
555 # cluster --------------------------
558 def perspective_version(params):
559 """Query version information.
562 return constants.PROTOCOL_VERSION
565 def perspective_upload_file(params):
568 Note that the backend implementation imposes strict rules on which
572 return backend.UploadFile(*params)
575 def perspective_master_info(params):
576 """Query master information.
579 return backend.GetMasterInfo()
582 def perspective_write_ssconf_files(params):
583 """Write ssconf files.
587 return backend.WriteSsconfFiles(values)
589 # os -----------------------
592 def perspective_os_diagnose(params):
593 """Query detailed information about existing OSes.
596 return [os.ToDict() for os in backend.DiagnoseOS()]
599 def perspective_os_get(params):
600 """Query information about a given OS.
605 os_obj = backend.OSFromDisk(name)
606 except errors.InvalidOS, err:
607 os_obj = objects.OS.FromInvalidOS(err)
608 return os_obj.ToDict()
610 # hooks -----------------------
613 def perspective_hooks_runner(params):
617 hpath, phase, env = params
618 hr = backend.HooksRunner()
619 return hr.RunHooks(hpath, phase, env)
621 # iallocator -----------------
624 def perspective_iallocator_runner(params):
625 """Run an iallocator script.
629 iar = backend.IAllocatorRunner()
630 return iar.Run(name, idata)
632 # test -----------------------
635 def perspective_test_delay(params):
640 return utils.TestDelay(duration)
642 # file storage ---------------
645 def perspective_file_storage_dir_create(params):
646 """Create the file storage directory.
649 file_storage_dir = params[0]
650 return backend.CreateFileStorageDir(file_storage_dir)
653 def perspective_file_storage_dir_remove(params):
654 """Remove the file storage directory.
657 file_storage_dir = params[0]
658 return backend.RemoveFileStorageDir(file_storage_dir)
661 def perspective_file_storage_dir_rename(params):
662 """Rename the file storage directory.
665 old_file_storage_dir = params[0]
666 new_file_storage_dir = params[1]
667 return backend.RenameFileStorageDir(old_file_storage_dir,
668 new_file_storage_dir)
670 # jobs ------------------------
673 @_RequireJobQueueLock
674 def perspective_jobqueue_update(params):
678 (file_name, content) = params
679 return backend.JobQueueUpdate(file_name, content)
682 @_RequireJobQueueLock
683 def perspective_jobqueue_purge(params):
687 return backend.JobQueuePurge()
690 @_RequireJobQueueLock
691 def perspective_jobqueue_rename(params):
692 """Rename a job queue file.
695 # TODO: What if a file fails to rename?
696 return [backend.JobQueueRename(old, new) for old, new in params]
699 def perspective_jobqueue_set_drain(params):
700 """Set/unset the queue drain flag.
703 drain_flag = params[0]
704 return backend.JobQueueSetDrainFlag(drain_flag)
707 # hypervisor ---------------
710 def perspective_hypervisor_validate_params(params):
711 """Validate the hypervisor parameters.
714 (hvname, hvparams) = params
715 return backend.ValidateHVParams(hvname, hvparams)
719 """Parse the command line options.
721 @return: (options, args) as from OptionParser.parse_args()
724 parser = OptionParser(description="Ganeti node daemon",
725 usage="%prog [-f] [-d]",
726 version="%%prog (ganeti) %s" %
727 constants.RELEASE_VERSION)
729 parser.add_option("-f", "--foreground", dest="fork",
730 help="Don't detach from the current terminal",
731 default=True, action="store_false")
732 parser.add_option("-d", "--debug", dest="debug",
733 help="Enable some debug messages",
734 default=False, action="store_true")
735 options, args = parser.parse_args()
739 def EnsureRuntimeEnvironment():
740 """Ensure our run-time environment is complete.
742 Currently this creates directories which could be missing, either
743 due to directories being on a tmpfs mount, or due to incomplete
747 dirs = [(val, constants.RUN_DIRS_MODE) for val in constants.SUB_RUN_DIRS]
748 dirs.append((constants.LOG_OS_DIR, 0750))
749 for dir_name, dir_mode in dirs:
750 if not os.path.exists(dir_name):
752 os.mkdir(dir_name, dir_mode)
753 except EnvironmentError, err:
754 if err.errno != errno.EEXIST:
755 print ("Node setup wrong, cannot create directory '%s': %s" %
758 if not os.path.isdir(dir_name):
759 print ("Node setup wrong, '%s' is not a directory" % dir_name)
764 """Main function for the node daemon.
769 options, args = ParseOptions()
770 utils.debug = options.debug
775 for fname in (constants.SSL_CERT_FILE,):
776 if not os.path.isfile(fname):
777 print "config %s not there, will not run." % fname
781 port = utils.GetNodeDaemonPort()
782 except errors.ConfigurationError, err:
783 print "Cluster configuration incomplete: '%s'" % str(err)
786 EnsureRuntimeEnvironment()
790 utils.Daemonize(logfile=constants.LOG_NODESERVER)
792 utils.WritePidFile(constants.NODED_PID)
794 utils.SetupLogging(logfile=constants.LOG_NODESERVER, debug=options.debug,
795 stderr_logging=not options.fork)
796 logging.info("ganeti node daemon startup")
798 # Read SSL certificate
799 ssl_params = http.HttpSslParams(ssl_key_path=constants.SSL_CERT_FILE,
800 ssl_cert_path=constants.SSL_CERT_FILE)
803 queue_lock = jstore.InitAndVerifyQueue(must_lock=False)
805 mainloop = daemon.Mainloop()
806 server = NodeHttpServer(mainloop, "", port,
807 ssl_params=ssl_params, ssl_verify_peer=True)
814 utils.RemovePidFile(constants.NODED_PID)
817 if __name__ == '__main__':