root / daemons / ganeti-noded @ d06565e0
History | View | Annotate | Download (16.3 kB)
1 |
#!/usr/bin/python |
---|---|
2 |
# |
3 |
|
4 |
# Copyright (C) 2006, 2007 Google Inc. |
5 |
# |
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. |
10 |
# |
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. |
15 |
# |
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 |
19 |
# 02110-1301, USA. |
20 |
|
21 |
|
22 |
"""Ganeti node daemon""" |
23 |
|
24 |
# functions in this module need to have a given name structure, so: |
25 |
# pylint: disable-msg=C0103 |
26 |
|
27 |
import os |
28 |
import sys |
29 |
import resource |
30 |
import traceback |
31 |
|
32 |
from optparse import OptionParser |
33 |
|
34 |
|
35 |
from ganeti import backend |
36 |
from ganeti import logger |
37 |
from ganeti import constants |
38 |
from ganeti import objects |
39 |
from ganeti import errors |
40 |
from ganeti import ssconf |
41 |
from ganeti import utils |
42 |
|
43 |
from twisted.spread import pb |
44 |
from twisted.internet import reactor |
45 |
from twisted.cred import checkers, portal |
46 |
from OpenSSL import SSL |
47 |
|
48 |
|
49 |
class ServerContextFactory: |
50 |
"""SSL context factory class that uses a given certificate. |
51 |
|
52 |
""" |
53 |
@staticmethod |
54 |
def getContext(): |
55 |
"""Return a customized context. |
56 |
|
57 |
The context will be set to use our certificate. |
58 |
|
59 |
""" |
60 |
ctx = SSL.Context(SSL.TLSv1_METHOD) |
61 |
ctx.use_certificate_file(constants.SSL_CERT_FILE) |
62 |
ctx.use_privatekey_file(constants.SSL_CERT_FILE) |
63 |
return ctx |
64 |
|
65 |
class ServerObject(pb.Avatar): |
66 |
"""The server implementation. |
67 |
|
68 |
This class holds all methods exposed over the RPC interface. |
69 |
|
70 |
""" |
71 |
def __init__(self, name): |
72 |
self.name = name |
73 |
|
74 |
def perspectiveMessageReceived(self, broker, message, args, kw): |
75 |
"""Custom message dispatching function. |
76 |
|
77 |
This function overrides the pb.Avatar function in order to provide |
78 |
a simple form of exception passing (as text only). |
79 |
|
80 |
""" |
81 |
args = broker.unserialize(args, self) |
82 |
kw = broker.unserialize(kw, self) |
83 |
method = getattr(self, "perspective_%s" % message) |
84 |
tb = None |
85 |
state = None |
86 |
try: |
87 |
state = method(*args, **kw) |
88 |
except: |
89 |
tb = traceback.format_exc() |
90 |
|
91 |
return broker.serialize((tb, state), self, method, args, kw) |
92 |
|
93 |
# the new block devices -------------------------- |
94 |
|
95 |
@staticmethod |
96 |
def perspective_blockdev_create(params): |
97 |
"""Create a block device. |
98 |
|
99 |
""" |
100 |
bdev_s, size, on_primary, info = params |
101 |
bdev = objects.Disk.FromDict(bdev_s) |
102 |
if bdev is None: |
103 |
raise ValueError("can't unserialize data!") |
104 |
return backend.CreateBlockDevice(bdev, size, on_primary, info) |
105 |
|
106 |
@staticmethod |
107 |
def perspective_blockdev_remove(params): |
108 |
"""Remove a block device. |
109 |
|
110 |
""" |
111 |
bdev_s = params[0] |
112 |
bdev = objects.Disk.FromDict(bdev_s) |
113 |
return backend.RemoveBlockDevice(bdev) |
114 |
|
115 |
@staticmethod |
116 |
def perspective_blockdev_rename(params): |
117 |
"""Remove a block device. |
118 |
|
119 |
""" |
120 |
devlist = [(objects.Disk.FromDict(ds), uid) for ds, uid in params] |
121 |
return backend.RenameBlockDevices(devlist) |
122 |
|
123 |
@staticmethod |
124 |
def perspective_blockdev_assemble(params): |
125 |
"""Assemble a block device. |
126 |
|
127 |
""" |
128 |
bdev_s, on_primary = params |
129 |
bdev = objects.Disk.FromDict(bdev_s) |
130 |
if bdev is None: |
131 |
raise ValueError("can't unserialize data!") |
132 |
return backend.AssembleBlockDevice(bdev, on_primary) |
133 |
|
134 |
@staticmethod |
135 |
def perspective_blockdev_shutdown(params): |
136 |
"""Shutdown a block device. |
137 |
|
138 |
""" |
139 |
bdev_s = params[0] |
140 |
bdev = objects.Disk.FromDict(bdev_s) |
141 |
if bdev is None: |
142 |
raise ValueError("can't unserialize data!") |
143 |
return backend.ShutdownBlockDevice(bdev) |
144 |
|
145 |
@staticmethod |
146 |
def perspective_blockdev_addchildren(params): |
147 |
"""Add a child to a mirror device. |
148 |
|
149 |
Note: this is only valid for mirror devices. It's the caller's duty |
150 |
to send a correct disk, otherwise we raise an error. |
151 |
|
152 |
""" |
153 |
bdev_s, ndev_s = params |
154 |
bdev = objects.Disk.FromDict(bdev_s) |
155 |
ndevs = [objects.Disk.FromDict(disk_s) for disk_s in ndev_s] |
156 |
if bdev is None or ndevs.count(None) > 0: |
157 |
raise ValueError("can't unserialize data!") |
158 |
return backend.MirrorAddChildren(bdev, ndevs) |
159 |
|
160 |
@staticmethod |
161 |
def perspective_blockdev_removechildren(params): |
162 |
"""Remove a child from a mirror device. |
163 |
|
164 |
This is only valid for mirror devices, of course. It's the callers |
165 |
duty to send a correct disk, otherwise we raise an error. |
166 |
|
167 |
""" |
168 |
bdev_s, ndev_s = params |
169 |
bdev = objects.Disk.FromDict(bdev_s) |
170 |
ndevs = [objects.Disk.FromDict(disk_s) for disk_s in ndev_s] |
171 |
if bdev is None or ndevs.count(None) > 0: |
172 |
raise ValueError("can't unserialize data!") |
173 |
return backend.MirrorRemoveChildren(bdev, ndevs) |
174 |
|
175 |
@staticmethod |
176 |
def perspective_blockdev_getmirrorstatus(params): |
177 |
"""Return the mirror status for a list of disks. |
178 |
|
179 |
""" |
180 |
disks = [objects.Disk.FromDict(dsk_s) |
181 |
for dsk_s in params] |
182 |
return backend.GetMirrorStatus(disks) |
183 |
|
184 |
@staticmethod |
185 |
def perspective_blockdev_find(params): |
186 |
"""Expose the FindBlockDevice functionality for a disk. |
187 |
|
188 |
This will try to find but not activate a disk. |
189 |
|
190 |
""" |
191 |
disk = objects.Disk.FromDict(params[0]) |
192 |
return backend.FindBlockDevice(disk) |
193 |
|
194 |
@staticmethod |
195 |
def perspective_blockdev_snapshot(params): |
196 |
"""Create a snapshot device. |
197 |
|
198 |
Note that this is only valid for LVM disks, if we get passed |
199 |
something else we raise an exception. The snapshot device can be |
200 |
remove by calling the generic block device remove call. |
201 |
|
202 |
""" |
203 |
cfbd = objects.Disk.FromDict(params[0]) |
204 |
return backend.SnapshotBlockDevice(cfbd) |
205 |
|
206 |
# export/import -------------------------- |
207 |
|
208 |
@staticmethod |
209 |
def perspective_snapshot_export(params): |
210 |
"""Export a given snapshot. |
211 |
|
212 |
""" |
213 |
disk = objects.Disk.FromDict(params[0]) |
214 |
dest_node = params[1] |
215 |
instance = objects.Instance.FromDict(params[2]) |
216 |
return backend.ExportSnapshot(disk, dest_node, instance) |
217 |
|
218 |
@staticmethod |
219 |
def perspective_finalize_export(params): |
220 |
"""Expose the finalize export functionality. |
221 |
|
222 |
""" |
223 |
instance = objects.Instance.FromDict(params[0]) |
224 |
snap_disks = [objects.Disk.FromDict(str_data) |
225 |
for str_data in params[1]] |
226 |
return backend.FinalizeExport(instance, snap_disks) |
227 |
|
228 |
@staticmethod |
229 |
def perspective_export_info(params): |
230 |
"""Query information about an existing export on this node. |
231 |
|
232 |
The given path may not contain an export, in which case we return |
233 |
None. |
234 |
|
235 |
""" |
236 |
path = params[0] |
237 |
einfo = backend.ExportInfo(path) |
238 |
if einfo is None: |
239 |
return einfo |
240 |
return einfo.Dumps() |
241 |
|
242 |
@staticmethod |
243 |
def perspective_export_list(params): |
244 |
"""List the available exports on this node. |
245 |
|
246 |
Note that as opposed to export_info, which may query data about an |
247 |
export in any path, this only queries the standard Ganeti path |
248 |
(constants.EXPORT_DIR). |
249 |
|
250 |
""" |
251 |
return backend.ListExports() |
252 |
|
253 |
@staticmethod |
254 |
def perspective_export_remove(params): |
255 |
"""Remove an export. |
256 |
|
257 |
""" |
258 |
export = params[0] |
259 |
return backend.RemoveExport(export) |
260 |
|
261 |
# volume -------------------------- |
262 |
|
263 |
@staticmethod |
264 |
def perspective_volume_list(params): |
265 |
"""Query the list of logical volumes in a given volume group. |
266 |
|
267 |
""" |
268 |
vgname = params[0] |
269 |
return backend.GetVolumeList(vgname) |
270 |
|
271 |
@staticmethod |
272 |
def perspective_vg_list(params): |
273 |
"""Query the list of volume groups. |
274 |
|
275 |
""" |
276 |
return backend.ListVolumeGroups() |
277 |
|
278 |
# bridge -------------------------- |
279 |
|
280 |
@staticmethod |
281 |
def perspective_bridges_exist(params): |
282 |
"""Check if all bridges given exist on this node. |
283 |
|
284 |
""" |
285 |
bridges_list = params[0] |
286 |
return backend.BridgesExist(bridges_list) |
287 |
|
288 |
# instance -------------------------- |
289 |
|
290 |
@staticmethod |
291 |
def perspective_instance_os_add(params): |
292 |
"""Install an OS on a given instance. |
293 |
|
294 |
""" |
295 |
inst_s, os_disk, swap_disk = params |
296 |
inst = objects.Instance.FromDict(inst_s) |
297 |
return backend.AddOSToInstance(inst, os_disk, swap_disk) |
298 |
|
299 |
@staticmethod |
300 |
def perspective_instance_run_rename(params): |
301 |
"""Runs the OS rename script for an instance. |
302 |
|
303 |
""" |
304 |
inst_s, old_name, os_disk, swap_disk = params |
305 |
inst = objects.Instance.FromDict(inst_s) |
306 |
return backend.RunRenameInstance(inst, old_name, os_disk, swap_disk) |
307 |
|
308 |
@staticmethod |
309 |
def perspective_instance_os_import(params): |
310 |
"""Run the import function of an OS onto a given instance. |
311 |
|
312 |
""" |
313 |
inst_s, os_disk, swap_disk, src_node, src_image = params |
314 |
inst = objects.Instance.FromDict(inst_s) |
315 |
return backend.ImportOSIntoInstance(inst, os_disk, swap_disk, |
316 |
src_node, src_image) |
317 |
|
318 |
@staticmethod |
319 |
def perspective_instance_shutdown(params): |
320 |
"""Shutdown an instance. |
321 |
|
322 |
""" |
323 |
instance = objects.Instance.FromDict(params[0]) |
324 |
return backend.ShutdownInstance(instance) |
325 |
|
326 |
@staticmethod |
327 |
def perspective_instance_start(params): |
328 |
"""Start an instance. |
329 |
|
330 |
""" |
331 |
instance = objects.Instance.FromDict(params[0]) |
332 |
extra_args = params[1] |
333 |
return backend.StartInstance(instance, extra_args) |
334 |
|
335 |
@staticmethod |
336 |
def perspective_instance_reboot(params): |
337 |
"""Reboot an instance. |
338 |
|
339 |
""" |
340 |
instance = objects.Instance.FromDict(params[0]) |
341 |
reboot_type = params[1] |
342 |
extra_args = params[2] |
343 |
return backend.RebootInstance(instance, reboot_type, extra_args) |
344 |
|
345 |
@staticmethod |
346 |
def perspective_instance_info(params): |
347 |
"""Query instance information. |
348 |
|
349 |
""" |
350 |
return backend.GetInstanceInfo(params[0]) |
351 |
|
352 |
@staticmethod |
353 |
def perspective_all_instances_info(params): |
354 |
"""Query information about all instances. |
355 |
|
356 |
""" |
357 |
return backend.GetAllInstancesInfo() |
358 |
|
359 |
@staticmethod |
360 |
def perspective_instance_list(params): |
361 |
"""Query the list of running instances. |
362 |
|
363 |
""" |
364 |
return backend.GetInstanceList() |
365 |
|
366 |
# node -------------------------- |
367 |
|
368 |
@staticmethod |
369 |
def perspective_node_tcp_ping(params): |
370 |
"""Do a TcpPing on the remote node. |
371 |
|
372 |
""" |
373 |
return utils.TcpPing(params[0], params[1], params[2], |
374 |
timeout=params[3], live_port_needed=params[4]) |
375 |
|
376 |
@staticmethod |
377 |
def perspective_node_info(params): |
378 |
"""Query node information. |
379 |
|
380 |
""" |
381 |
vgname = params[0] |
382 |
return backend.GetNodeInfo(vgname) |
383 |
|
384 |
@staticmethod |
385 |
def perspective_node_add(params): |
386 |
"""Complete the registration of this node in the cluster. |
387 |
|
388 |
""" |
389 |
return backend.AddNode(params[0], params[1], params[2], |
390 |
params[3], params[4], params[5]) |
391 |
|
392 |
@staticmethod |
393 |
def perspective_node_verify(params): |
394 |
"""Run a verify sequence on this node. |
395 |
|
396 |
""" |
397 |
return backend.VerifyNode(params[0]) |
398 |
|
399 |
@staticmethod |
400 |
def perspective_node_start_master(params): |
401 |
"""Promote this node to master status. |
402 |
|
403 |
""" |
404 |
return backend.StartMaster() |
405 |
|
406 |
@staticmethod |
407 |
def perspective_node_stop_master(params): |
408 |
"""Demote this node from master status. |
409 |
|
410 |
""" |
411 |
return backend.StopMaster() |
412 |
|
413 |
@staticmethod |
414 |
def perspective_node_leave_cluster(params): |
415 |
"""Cleanup after leaving a cluster. |
416 |
|
417 |
""" |
418 |
return backend.LeaveCluster() |
419 |
|
420 |
@staticmethod |
421 |
def perspective_node_volumes(params): |
422 |
"""Query the list of all logical volume groups. |
423 |
|
424 |
""" |
425 |
return backend.NodeVolumes() |
426 |
|
427 |
# cluster -------------------------- |
428 |
|
429 |
@staticmethod |
430 |
def perspective_version(params): |
431 |
"""Query version information. |
432 |
|
433 |
""" |
434 |
return constants.PROTOCOL_VERSION |
435 |
|
436 |
@staticmethod |
437 |
def perspective_upload_file(params): |
438 |
"""Upload a file. |
439 |
|
440 |
Note that the backend implementation imposes strict rules on which |
441 |
files are accepted. |
442 |
|
443 |
""" |
444 |
return backend.UploadFile(*params) |
445 |
|
446 |
|
447 |
# os ----------------------- |
448 |
|
449 |
@staticmethod |
450 |
def perspective_os_diagnose(params): |
451 |
"""Query detailed information about existing OSes. |
452 |
|
453 |
""" |
454 |
os_list = backend.DiagnoseOS() |
455 |
if not os_list: |
456 |
# this catches also return values of 'False', |
457 |
# for which we can't iterate over |
458 |
return os_list |
459 |
result = [] |
460 |
for data in os_list: |
461 |
if isinstance(data, objects.OS): |
462 |
result.append(data.ToDict()) |
463 |
elif isinstance(data, errors.InvalidOS): |
464 |
result.append(data.args) |
465 |
else: |
466 |
raise errors.ProgrammerError("Invalid result from backend.DiagnoseOS" |
467 |
" (class %s, %s)" % |
468 |
(str(data.__class__), data)) |
469 |
|
470 |
return result |
471 |
|
472 |
@staticmethod |
473 |
def perspective_os_get(params): |
474 |
"""Query information about a given OS. |
475 |
|
476 |
""" |
477 |
name = params[0] |
478 |
try: |
479 |
os_obj = backend.OSFromDisk(name).ToDict() |
480 |
except errors.InvalidOS, err: |
481 |
os_obj = err.args |
482 |
return os_obj |
483 |
|
484 |
# hooks ----------------------- |
485 |
|
486 |
@staticmethod |
487 |
def perspective_hooks_runner(params): |
488 |
"""Run hook scripts. |
489 |
|
490 |
""" |
491 |
hpath, phase, env = params |
492 |
hr = backend.HooksRunner() |
493 |
return hr.RunHooks(hpath, phase, env) |
494 |
|
495 |
|
496 |
class MyRealm: |
497 |
"""Simple realm that forwards all requests to a ServerObject. |
498 |
|
499 |
""" |
500 |
__implements__ = portal.IRealm |
501 |
|
502 |
def requestAvatar(self, avatarId, mind, *interfaces): |
503 |
"""Return an avatar based on our ServerObject class. |
504 |
|
505 |
""" |
506 |
if pb.IPerspective not in interfaces: |
507 |
raise NotImplementedError |
508 |
return pb.IPerspective, ServerObject(avatarId), lambda:None |
509 |
|
510 |
|
511 |
def ParseOptions(): |
512 |
"""Parse the command line options. |
513 |
|
514 |
Returns: |
515 |
(options, args) as from OptionParser.parse_args() |
516 |
|
517 |
""" |
518 |
parser = OptionParser(description="Ganeti node daemon", |
519 |
usage="%prog [-f] [-d]", |
520 |
version="%%prog (ganeti) %s" % |
521 |
constants.RELEASE_VERSION) |
522 |
|
523 |
parser.add_option("-f", "--foreground", dest="fork", |
524 |
help="Don't detach from the current terminal", |
525 |
default=True, action="store_false") |
526 |
parser.add_option("-d", "--debug", dest="debug", |
527 |
help="Enable some debug messages", |
528 |
default=False, action="store_true") |
529 |
options, args = parser.parse_args() |
530 |
return options, args |
531 |
|
532 |
|
533 |
def main(): |
534 |
"""Main function for the node daemon. |
535 |
|
536 |
""" |
537 |
options, args = ParseOptions() |
538 |
for fname in (constants.SSL_CERT_FILE,): |
539 |
if not os.path.isfile(fname): |
540 |
print "config %s not there, will not run." % fname |
541 |
sys.exit(5) |
542 |
|
543 |
try: |
544 |
ss = ssconf.SimpleStore() |
545 |
port = ss.GetNodeDaemonPort() |
546 |
pwdata = ss.GetNodeDaemonPassword() |
547 |
except errors.ConfigurationError, err: |
548 |
print "Cluster configuration incomplete: '%s'" % str(err) |
549 |
sys.exit(5) |
550 |
|
551 |
# become a daemon |
552 |
if options.fork: |
553 |
createDaemon() |
554 |
|
555 |
logger.SetupLogging(twisted_workaround=True, debug=options.debug, |
556 |
program="ganeti-noded") |
557 |
|
558 |
p = portal.Portal(MyRealm()) |
559 |
p.registerChecker( |
560 |
checkers.InMemoryUsernamePasswordDatabaseDontUse(master_node=pwdata)) |
561 |
reactor.listenSSL(port, pb.PBServerFactory(p), ServerContextFactory()) |
562 |
reactor.run() |
563 |
|
564 |
|
565 |
def createDaemon(): |
566 |
"""Detach a process from the controlling terminal and run it in the |
567 |
background as a daemon. |
568 |
|
569 |
""" |
570 |
UMASK = 077 |
571 |
WORKDIR = "/" |
572 |
# Default maximum for the number of available file descriptors. |
573 |
if 'SC_OPEN_MAX' in os.sysconf_names: |
574 |
try: |
575 |
MAXFD = os.sysconf('SC_OPEN_MAX') |
576 |
if MAXFD < 0: |
577 |
MAXFD = 1024 |
578 |
except OSError: |
579 |
MAXFD = 1024 |
580 |
else: |
581 |
MAXFD = 1024 |
582 |
# The standard I/O file descriptors are redirected to /dev/null by default. |
583 |
#REDIRECT_TO = getattr(os, "devnull", "/dev/null") |
584 |
REDIRECT_TO = constants.LOG_NODESERVER |
585 |
try: |
586 |
pid = os.fork() |
587 |
except OSError, e: |
588 |
raise Exception("%s [%d]" % (e.strerror, e.errno)) |
589 |
if (pid == 0): # The first child. |
590 |
os.setsid() |
591 |
try: |
592 |
pid = os.fork() # Fork a second child. |
593 |
except OSError, e: |
594 |
raise Exception("%s [%d]" % (e.strerror, e.errno)) |
595 |
if (pid == 0): # The second child. |
596 |
os.chdir(WORKDIR) |
597 |
os.umask(UMASK) |
598 |
else: |
599 |
# exit() or _exit()? See below. |
600 |
os._exit(0) # Exit parent (the first child) of the second child. |
601 |
else: |
602 |
os._exit(0) # Exit parent of the first child. |
603 |
maxfd = resource.getrlimit(resource.RLIMIT_NOFILE)[1] |
604 |
if (maxfd == resource.RLIM_INFINITY): |
605 |
maxfd = MAXFD |
606 |
|
607 |
# Iterate through and close all file descriptors. |
608 |
for fd in range(0, maxfd): |
609 |
try: |
610 |
os.close(fd) |
611 |
except OSError: # ERROR, fd wasn't open to begin with (ignored) |
612 |
pass |
613 |
os.open(REDIRECT_TO, os.O_RDWR|os.O_CREAT|os.O_APPEND, 0600) |
614 |
# Duplicate standard input to standard output and standard error. |
615 |
os.dup2(0, 1) # standard output (1) |
616 |
os.dup2(0, 2) # standard error (2) |
617 |
return(0) |
618 |
|
619 |
|
620 |
if __name__ == '__main__': |
621 |
main() |