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
33 from optparse import OptionParser
35 from ganeti import backend
36 from ganeti import constants
37 from ganeti import objects
38 from ganeti import errors
39 from ganeti import jstore
40 from ganeti import daemon
41 from ganeti import http
42 from ganeti import utils
43 from ganeti import storage
45 import ganeti.http.server
51 def _RequireJobQueueLock(fn):
52 """Decorator for job queue manipulating functions.
55 QUEUE_LOCK_TIMEOUT = 10
57 def wrapper(*args, **kwargs):
58 # Locking in exclusive, blocking mode because there could be several
59 # children running at the same time. Waiting up to 10 seconds.
60 queue_lock.Exclusive(blocking=True, timeout=QUEUE_LOCK_TIMEOUT)
62 return fn(*args, **kwargs)
69 class NodeHttpServer(http.server.HttpServer):
70 """The server implementation.
72 This class holds all methods exposed over the RPC interface.
75 def __init__(self, *args, **kwargs):
76 http.server.HttpServer.__init__(self, *args, **kwargs)
77 self.noded_pid = os.getpid()
79 def HandleRequest(self, req):
83 if req.request_method.upper() != http.HTTP_PUT:
84 raise http.HttpBadRequest()
86 path = req.request_path
87 if path.startswith("/"):
90 method = getattr(self, "perspective_%s" % path, None)
92 raise http.HttpNotFound()
95 rvalue = method(req.request_body)
98 except backend.RPCFail, err:
99 # our custom failure exception; str(err) works fine if the
100 # exception was constructed with a single argument, and in
101 # this case, err.message == err.args[0] == str(err)
102 return (False, str(err))
103 except errors.QuitGanetiException, err:
104 # Tell parent to quit
105 logging.info("Shutting down the node daemon, arguments: %s",
107 os.kill(self.noded_pid, signal.SIGTERM)
108 # And return the error's arguments, which must be already in
109 # correct tuple format
111 except Exception, err:
112 logging.exception("Error in RPC call")
113 return False, "Error while executing backend function: %s" % str(err)
115 # the new block devices --------------------------
118 def perspective_blockdev_create(params):
119 """Create a block device.
122 bdev_s, size, owner, on_primary, info = params
123 bdev = objects.Disk.FromDict(bdev_s)
125 raise ValueError("can't unserialize data!")
126 return backend.BlockdevCreate(bdev, size, owner, on_primary, info)
129 def perspective_blockdev_remove(params):
130 """Remove a block device.
134 bdev = objects.Disk.FromDict(bdev_s)
135 return backend.BlockdevRemove(bdev)
138 def perspective_blockdev_rename(params):
139 """Remove a block device.
142 devlist = [(objects.Disk.FromDict(ds), uid) for ds, uid in params]
143 return backend.BlockdevRename(devlist)
146 def perspective_blockdev_assemble(params):
147 """Assemble a block device.
150 bdev_s, owner, on_primary = params
151 bdev = objects.Disk.FromDict(bdev_s)
153 raise ValueError("can't unserialize data!")
154 return backend.BlockdevAssemble(bdev, owner, on_primary)
157 def perspective_blockdev_shutdown(params):
158 """Shutdown a block device.
162 bdev = objects.Disk.FromDict(bdev_s)
164 raise ValueError("can't unserialize data!")
165 return backend.BlockdevShutdown(bdev)
168 def perspective_blockdev_addchildren(params):
169 """Add a child to a mirror device.
171 Note: this is only valid for mirror devices. It's the caller's duty
172 to send a correct disk, otherwise we raise an error.
175 bdev_s, ndev_s = params
176 bdev = objects.Disk.FromDict(bdev_s)
177 ndevs = [objects.Disk.FromDict(disk_s) for disk_s in ndev_s]
178 if bdev is None or ndevs.count(None) > 0:
179 raise ValueError("can't unserialize data!")
180 return backend.BlockdevAddchildren(bdev, ndevs)
183 def perspective_blockdev_removechildren(params):
184 """Remove a child from a mirror device.
186 This is only valid for mirror devices, of course. It's the callers
187 duty to send a correct disk, otherwise we raise an error.
190 bdev_s, ndev_s = params
191 bdev = objects.Disk.FromDict(bdev_s)
192 ndevs = [objects.Disk.FromDict(disk_s) for disk_s in ndev_s]
193 if bdev is None or ndevs.count(None) > 0:
194 raise ValueError("can't unserialize data!")
195 return backend.BlockdevRemovechildren(bdev, ndevs)
198 def perspective_blockdev_getmirrorstatus(params):
199 """Return the mirror status for a list of disks.
202 disks = [objects.Disk.FromDict(dsk_s)
204 return [status.ToDict()
205 for status in backend.BlockdevGetmirrorstatus(disks)]
208 def perspective_blockdev_find(params):
209 """Expose the FindBlockDevice functionality for a disk.
211 This will try to find but not activate a disk.
214 disk = objects.Disk.FromDict(params[0])
216 result = backend.BlockdevFind(disk)
220 return result.ToDict()
223 def perspective_blockdev_snapshot(params):
224 """Create a snapshot device.
226 Note that this is only valid for LVM disks, if we get passed
227 something else we raise an exception. The snapshot device can be
228 remove by calling the generic block device remove call.
231 cfbd = objects.Disk.FromDict(params[0])
232 return backend.BlockdevSnapshot(cfbd)
235 def perspective_blockdev_grow(params):
236 """Grow a stack of devices.
239 cfbd = objects.Disk.FromDict(params[0])
241 return backend.BlockdevGrow(cfbd, amount)
244 def perspective_blockdev_close(params):
245 """Closes the given block devices.
248 disks = [objects.Disk.FromDict(cf) for cf in params[1]]
249 return backend.BlockdevClose(params[0], disks)
252 def perspective_blockdev_getsize(params):
253 """Compute the sizes of the given block devices.
256 disks = [objects.Disk.FromDict(cf) for cf in params[0]]
257 return backend.BlockdevGetsize(disks)
259 # blockdev/drbd specific methods ----------
262 def perspective_drbd_disconnect_net(params):
263 """Disconnects the network connection of drbd disks.
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.DrbdDisconnectNet(nodes_ip, disks)
274 def perspective_drbd_attach_net(params):
275 """Attaches the network connection of drbd disks.
277 Note that this is only valid for drbd disks, so the members of the
278 disk list must all be drbd devices.
281 nodes_ip, disks, instance_name, multimaster = params
282 disks = [objects.Disk.FromDict(cf) for cf in disks]
283 return backend.DrbdAttachNet(nodes_ip, disks,
284 instance_name, multimaster)
287 def perspective_drbd_wait_sync(params):
288 """Wait until DRBD disks are synched.
290 Note that this is only valid for drbd disks, so the members of the
291 disk list must all be drbd devices.
294 nodes_ip, disks = params
295 disks = [objects.Disk.FromDict(cf) for cf in disks]
296 return backend.DrbdWaitSync(nodes_ip, disks)
298 # export/import --------------------------
301 def perspective_snapshot_export(params):
302 """Export a given snapshot.
305 disk = objects.Disk.FromDict(params[0])
306 dest_node = params[1]
307 instance = objects.Instance.FromDict(params[2])
308 cluster_name = params[3]
310 return backend.ExportSnapshot(disk, dest_node, instance,
311 cluster_name, dev_idx)
314 def perspective_finalize_export(params):
315 """Expose the finalize export functionality.
318 instance = objects.Instance.FromDict(params[0])
319 snap_disks = [objects.Disk.FromDict(str_data)
320 for str_data in params[1]]
321 return backend.FinalizeExport(instance, snap_disks)
324 def perspective_export_info(params):
325 """Query information about an existing export on this node.
327 The given path may not contain an export, in which case we return
332 return backend.ExportInfo(path)
335 def perspective_export_list(params):
336 """List the available exports on this node.
338 Note that as opposed to export_info, which may query data about an
339 export in any path, this only queries the standard Ganeti path
340 (constants.EXPORT_DIR).
343 return backend.ListExports()
346 def perspective_export_remove(params):
351 return backend.RemoveExport(export)
353 # volume --------------------------
356 def perspective_lv_list(params):
357 """Query the list of logical volumes in a given volume group.
361 return backend.GetVolumeList(vgname)
364 def perspective_vg_list(params):
365 """Query the list of volume groups.
368 return backend.ListVolumeGroups()
370 # Storage --------------------------
373 def perspective_storage_list(params):
374 """Get list of storage units.
377 (su_name, su_args, name, fields) = params
378 return storage.GetStorage(su_name, *su_args).List(name, fields)
381 def perspective_storage_modify(params):
382 """Modify a storage unit.
385 (su_name, su_args, name, changes) = params
386 return storage.GetStorage(su_name, *su_args).Modify(name, changes)
388 # bridge --------------------------
391 def perspective_bridges_exist(params):
392 """Check if all bridges given exist on this node.
395 bridges_list = params[0]
396 return backend.BridgesExist(bridges_list)
398 # instance --------------------------
401 def perspective_instance_os_add(params):
402 """Install an OS on a given instance.
406 inst = objects.Instance.FromDict(inst_s)
407 reinstall = params[1]
408 return backend.InstanceOsAdd(inst, reinstall)
411 def perspective_instance_run_rename(params):
412 """Runs the OS rename script for an instance.
415 inst_s, old_name = params
416 inst = objects.Instance.FromDict(inst_s)
417 return backend.RunRenameInstance(inst, old_name)
420 def perspective_instance_os_import(params):
421 """Run the import function of an OS onto a given instance.
424 inst_s, src_node, src_images, cluster_name = params
425 inst = objects.Instance.FromDict(inst_s)
426 return backend.ImportOSIntoInstance(inst, src_node, src_images,
430 def perspective_instance_shutdown(params):
431 """Shutdown an instance.
434 instance = objects.Instance.FromDict(params[0])
435 return backend.InstanceShutdown(instance)
438 def perspective_instance_start(params):
439 """Start an instance.
442 instance = objects.Instance.FromDict(params[0])
443 return backend.StartInstance(instance)
446 def perspective_migration_info(params):
447 """Gather information about an instance to be migrated.
450 instance = objects.Instance.FromDict(params[0])
451 return backend.MigrationInfo(instance)
454 def perspective_accept_instance(params):
455 """Prepare the node to accept an instance.
458 instance, info, target = params
459 instance = objects.Instance.FromDict(instance)
460 return backend.AcceptInstance(instance, info, target)
463 def perspective_finalize_migration(params):
464 """Finalize the instance migration.
467 instance, info, success = params
468 instance = objects.Instance.FromDict(instance)
469 return backend.FinalizeMigration(instance, info, success)
472 def perspective_instance_migrate(params):
473 """Migrates an instance.
476 instance, target, live = params
477 instance = objects.Instance.FromDict(instance)
478 return backend.MigrateInstance(instance, target, live)
481 def perspective_instance_reboot(params):
482 """Reboot an instance.
485 instance = objects.Instance.FromDict(params[0])
486 reboot_type = params[1]
487 return backend.InstanceReboot(instance, reboot_type)
490 def perspective_instance_info(params):
491 """Query instance information.
494 return backend.GetInstanceInfo(params[0], params[1])
497 def perspective_instance_migratable(params):
498 """Query whether the specified instance can be migrated.
501 instance = objects.Instance.FromDict(params[0])
502 return backend.GetInstanceMigratable(instance)
505 def perspective_all_instances_info(params):
506 """Query information about all instances.
509 return backend.GetAllInstancesInfo(params[0])
512 def perspective_instance_list(params):
513 """Query the list of running instances.
516 return backend.GetInstanceList(params[0])
518 # node --------------------------
521 def perspective_node_tcp_ping(params):
522 """Do a TcpPing on the remote node.
525 return utils.TcpPing(params[1], params[2], timeout=params[3],
526 live_port_needed=params[4], source=params[0])
529 def perspective_node_has_ip_address(params):
530 """Checks if a node has the given ip address.
533 return utils.OwnIpAddress(params[0])
536 def perspective_node_info(params):
537 """Query node information.
540 vgname, hypervisor_type = params
541 return backend.GetNodeInfo(vgname, hypervisor_type)
544 def perspective_node_add(params):
545 """Complete the registration of this node in the cluster.
548 return backend.AddNode(params[0], params[1], params[2],
549 params[3], params[4], params[5])
552 def perspective_node_verify(params):
553 """Run a verify sequence on this node.
556 return backend.VerifyNode(params[0], params[1])
559 def perspective_node_start_master(params):
560 """Promote this node to master status.
563 return backend.StartMaster(params[0], params[1])
566 def perspective_node_stop_master(params):
567 """Demote this node from master status.
570 return backend.StopMaster(params[0])
573 def perspective_node_leave_cluster(params):
574 """Cleanup after leaving a cluster.
577 return backend.LeaveCluster()
580 def perspective_node_volumes(params):
581 """Query the list of all logical volume groups.
584 return backend.NodeVolumes()
587 def perspective_node_demote_from_mc(params):
588 """Demote a node from the master candidate role.
591 return backend.DemoteFromMC()
595 def perspective_node_powercycle(params):
596 """Tries to powercycle the nod.
599 hypervisor_type = params[0]
600 return backend.PowercycleNode(hypervisor_type)
603 # cluster --------------------------
606 def perspective_version(params):
607 """Query version information.
610 return constants.PROTOCOL_VERSION
613 def perspective_upload_file(params):
616 Note that the backend implementation imposes strict rules on which
620 return backend.UploadFile(*params)
623 def perspective_master_info(params):
624 """Query master information.
627 return backend.GetMasterInfo()
630 def perspective_write_ssconf_files(params):
631 """Write ssconf files.
635 return backend.WriteSsconfFiles(values)
637 # os -----------------------
640 def perspective_os_diagnose(params):
641 """Query detailed information about existing OSes.
644 return backend.DiagnoseOS()
647 def perspective_os_get(params):
648 """Query information about a given OS.
652 os_obj = backend.OSFromDisk(name)
653 return os_obj.ToDict()
655 # hooks -----------------------
658 def perspective_hooks_runner(params):
662 hpath, phase, env = params
663 hr = backend.HooksRunner()
664 return hr.RunHooks(hpath, phase, env)
666 # iallocator -----------------
669 def perspective_iallocator_runner(params):
670 """Run an iallocator script.
674 iar = backend.IAllocatorRunner()
675 return iar.Run(name, idata)
677 # test -----------------------
680 def perspective_test_delay(params):
685 status, rval = utils.TestDelay(duration)
687 raise backend.RPCFail(rval)
690 # file storage ---------------
693 def perspective_file_storage_dir_create(params):
694 """Create the file storage directory.
697 file_storage_dir = params[0]
698 return backend.CreateFileStorageDir(file_storage_dir)
701 def perspective_file_storage_dir_remove(params):
702 """Remove the file storage directory.
705 file_storage_dir = params[0]
706 return backend.RemoveFileStorageDir(file_storage_dir)
709 def perspective_file_storage_dir_rename(params):
710 """Rename the file storage directory.
713 old_file_storage_dir = params[0]
714 new_file_storage_dir = params[1]
715 return backend.RenameFileStorageDir(old_file_storage_dir,
716 new_file_storage_dir)
718 # jobs ------------------------
721 @_RequireJobQueueLock
722 def perspective_jobqueue_update(params):
726 (file_name, content) = params
727 return backend.JobQueueUpdate(file_name, content)
730 @_RequireJobQueueLock
731 def perspective_jobqueue_purge(params):
735 return backend.JobQueuePurge()
738 @_RequireJobQueueLock
739 def perspective_jobqueue_rename(params):
740 """Rename a job queue file.
743 # TODO: What if a file fails to rename?
744 return [backend.JobQueueRename(old, new) for old, new in params]
747 def perspective_jobqueue_set_drain(params):
748 """Set/unset the queue drain flag.
751 drain_flag = params[0]
752 return backend.JobQueueSetDrainFlag(drain_flag)
755 # hypervisor ---------------
758 def perspective_hypervisor_validate_params(params):
759 """Validate the hypervisor parameters.
762 (hvname, hvparams) = params
763 return backend.ValidateHVParams(hvname, hvparams)
766 def ExecNODED(options, args):
767 """Main NODED function, executed with the pidfile held.
772 # Read SSL certificate
774 ssl_params = http.HttpSslParams(ssl_key_path=options.ssl_key,
775 ssl_cert_path=options.ssl_cert)
780 queue_lock = jstore.InitAndVerifyQueue(must_lock=False)
782 mainloop = daemon.Mainloop()
783 server = NodeHttpServer(mainloop, options.bind_address, options.port,
784 ssl_params=ssl_params, ssl_verify_peer=True)
793 """Main function for the node daemon.
796 parser = OptionParser(description="Ganeti node daemon",
797 usage="%prog [-f] [-d] [-p port] [-b ADDRESS]",
798 version="%%prog (ganeti) %s" %
799 constants.RELEASE_VERSION)
800 dirs = [(val, constants.RUN_DIRS_MODE) for val in constants.SUB_RUN_DIRS]
801 dirs.append((constants.LOG_OS_DIR, 0750))
802 dirs.append((constants.LOCK_DIR, 1777))
803 daemon.GenericMain(constants.NODED, parser, dirs, None, ExecNODED)
806 if __name__ == '__main__':