root / lib / config.py @ 4b63dc7a
History | View | Annotate | Download (53.8 kB)
1 |
#
|
---|---|
2 |
#
|
3 |
|
4 |
# Copyright (C) 2006, 2007, 2008, 2009, 2010 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 |
"""Configuration management for Ganeti
|
23 |
|
24 |
This module provides the interface to the Ganeti cluster configuration.
|
25 |
|
26 |
The configuration data is stored on every node but is updated on the master
|
27 |
only. After each update, the master distributes the data to the other nodes.
|
28 |
|
29 |
Currently, the data storage format is JSON. YAML was slow and consuming too
|
30 |
much memory.
|
31 |
|
32 |
"""
|
33 |
|
34 |
# pylint: disable-msg=R0904
|
35 |
# R0904: Too many public methods
|
36 |
|
37 |
import os |
38 |
import random |
39 |
import logging |
40 |
import time |
41 |
|
42 |
from ganeti import errors |
43 |
from ganeti import locking |
44 |
from ganeti import utils |
45 |
from ganeti import constants |
46 |
from ganeti import rpc |
47 |
from ganeti import objects |
48 |
from ganeti import serializer |
49 |
from ganeti import uidpool |
50 |
from ganeti import netutils |
51 |
from ganeti import runtime |
52 |
|
53 |
|
54 |
_config_lock = locking.SharedLock("ConfigWriter")
|
55 |
|
56 |
# job id used for resource management at config upgrade time
|
57 |
_UPGRADE_CONFIG_JID = "jid-cfg-upgrade"
|
58 |
|
59 |
|
60 |
def _ValidateConfig(data): |
61 |
"""Verifies that a configuration objects looks valid.
|
62 |
|
63 |
This only verifies the version of the configuration.
|
64 |
|
65 |
@raise errors.ConfigurationError: if the version differs from what
|
66 |
we expect
|
67 |
|
68 |
"""
|
69 |
if data.version != constants.CONFIG_VERSION:
|
70 |
raise errors.ConfigVersionMismatch(constants.CONFIG_VERSION, data.version)
|
71 |
|
72 |
|
73 |
class TemporaryReservationManager: |
74 |
"""A temporary resource reservation manager.
|
75 |
|
76 |
This is used to reserve resources in a job, before using them, making sure
|
77 |
other jobs cannot get them in the meantime.
|
78 |
|
79 |
"""
|
80 |
def __init__(self): |
81 |
self._ec_reserved = {}
|
82 |
|
83 |
def Reserved(self, resource): |
84 |
for holder_reserved in self._ec_reserved.items(): |
85 |
if resource in holder_reserved: |
86 |
return True |
87 |
return False |
88 |
|
89 |
def Reserve(self, ec_id, resource): |
90 |
if self.Reserved(resource): |
91 |
raise errors.ReservationError("Duplicate reservation for resource: %s." % |
92 |
(resource)) |
93 |
if ec_id not in self._ec_reserved: |
94 |
self._ec_reserved[ec_id] = set([resource]) |
95 |
else:
|
96 |
self._ec_reserved[ec_id].add(resource)
|
97 |
|
98 |
def DropECReservations(self, ec_id): |
99 |
if ec_id in self._ec_reserved: |
100 |
del self._ec_reserved[ec_id] |
101 |
|
102 |
def GetReserved(self): |
103 |
all_reserved = set()
|
104 |
for holder_reserved in self._ec_reserved.values(): |
105 |
all_reserved.update(holder_reserved) |
106 |
return all_reserved
|
107 |
|
108 |
def Generate(self, existing, generate_one_fn, ec_id): |
109 |
"""Generate a new resource of this type
|
110 |
|
111 |
"""
|
112 |
assert callable(generate_one_fn) |
113 |
|
114 |
all_elems = self.GetReserved()
|
115 |
all_elems.update(existing) |
116 |
retries = 64
|
117 |
while retries > 0: |
118 |
new_resource = generate_one_fn() |
119 |
if new_resource is not None and new_resource not in all_elems: |
120 |
break
|
121 |
else:
|
122 |
raise errors.ConfigurationError("Not able generate new resource" |
123 |
" (last tried: %s)" % new_resource)
|
124 |
self.Reserve(ec_id, new_resource)
|
125 |
return new_resource
|
126 |
|
127 |
|
128 |
class ConfigWriter: |
129 |
"""The interface to the cluster configuration.
|
130 |
|
131 |
@ivar _temporary_lvs: reservation manager for temporary LVs
|
132 |
@ivar _all_rms: a list of all temporary reservation managers
|
133 |
|
134 |
"""
|
135 |
def __init__(self, cfg_file=None, offline=False, _getents=runtime.GetEnts): |
136 |
self.write_count = 0 |
137 |
self._lock = _config_lock
|
138 |
self._config_data = None |
139 |
self._offline = offline
|
140 |
if cfg_file is None: |
141 |
self._cfg_file = constants.CLUSTER_CONF_FILE
|
142 |
else:
|
143 |
self._cfg_file = cfg_file
|
144 |
self._getents = _getents
|
145 |
self._temporary_ids = TemporaryReservationManager()
|
146 |
self._temporary_drbds = {}
|
147 |
self._temporary_macs = TemporaryReservationManager()
|
148 |
self._temporary_secrets = TemporaryReservationManager()
|
149 |
self._temporary_lvs = TemporaryReservationManager()
|
150 |
self._all_rms = [self._temporary_ids, self._temporary_macs, |
151 |
self._temporary_secrets, self._temporary_lvs] |
152 |
# Note: in order to prevent errors when resolving our name in
|
153 |
# _DistributeConfig, we compute it here once and reuse it; it's
|
154 |
# better to raise an error before starting to modify the config
|
155 |
# file than after it was modified
|
156 |
self._my_hostname = netutils.Hostname.GetSysName()
|
157 |
self._last_cluster_serial = -1 |
158 |
self._OpenConfig()
|
159 |
|
160 |
# this method needs to be static, so that we can call it on the class
|
161 |
@staticmethod
|
162 |
def IsCluster(): |
163 |
"""Check if the cluster is configured.
|
164 |
|
165 |
"""
|
166 |
return os.path.exists(constants.CLUSTER_CONF_FILE)
|
167 |
|
168 |
def _GenerateOneMAC(self): |
169 |
"""Generate one mac address
|
170 |
|
171 |
"""
|
172 |
prefix = self._config_data.cluster.mac_prefix
|
173 |
byte1 = random.randrange(0, 256) |
174 |
byte2 = random.randrange(0, 256) |
175 |
byte3 = random.randrange(0, 256) |
176 |
mac = "%s:%02x:%02x:%02x" % (prefix, byte1, byte2, byte3)
|
177 |
return mac
|
178 |
|
179 |
@locking.ssynchronized(_config_lock, shared=1) |
180 |
def GenerateMAC(self, ec_id): |
181 |
"""Generate a MAC for an instance.
|
182 |
|
183 |
This should check the current instances for duplicates.
|
184 |
|
185 |
"""
|
186 |
existing = self._AllMACs()
|
187 |
return self._temporary_ids.Generate(existing, self._GenerateOneMAC, ec_id) |
188 |
|
189 |
@locking.ssynchronized(_config_lock, shared=1) |
190 |
def ReserveMAC(self, mac, ec_id): |
191 |
"""Reserve a MAC for an instance.
|
192 |
|
193 |
This only checks instances managed by this cluster, it does not
|
194 |
check for potential collisions elsewhere.
|
195 |
|
196 |
"""
|
197 |
all_macs = self._AllMACs()
|
198 |
if mac in all_macs: |
199 |
raise errors.ReservationError("mac already in use") |
200 |
else:
|
201 |
self._temporary_macs.Reserve(mac, ec_id)
|
202 |
|
203 |
@locking.ssynchronized(_config_lock, shared=1) |
204 |
def ReserveLV(self, lv_name, ec_id): |
205 |
"""Reserve an VG/LV pair for an instance.
|
206 |
|
207 |
@type lv_name: string
|
208 |
@param lv_name: the logical volume name to reserve
|
209 |
|
210 |
"""
|
211 |
all_lvs = self._AllLVs()
|
212 |
if lv_name in all_lvs: |
213 |
raise errors.ReservationError("LV already in use") |
214 |
else:
|
215 |
self._temporary_lvs.Reserve(lv_name, ec_id)
|
216 |
|
217 |
@locking.ssynchronized(_config_lock, shared=1) |
218 |
def GenerateDRBDSecret(self, ec_id): |
219 |
"""Generate a DRBD secret.
|
220 |
|
221 |
This checks the current disks for duplicates.
|
222 |
|
223 |
"""
|
224 |
return self._temporary_secrets.Generate(self._AllDRBDSecrets(), |
225 |
utils.GenerateSecret, |
226 |
ec_id) |
227 |
|
228 |
def _AllLVs(self): |
229 |
"""Compute the list of all LVs.
|
230 |
|
231 |
"""
|
232 |
lvnames = set()
|
233 |
for instance in self._config_data.instances.values(): |
234 |
node_data = instance.MapLVsByNode() |
235 |
for lv_list in node_data.values(): |
236 |
lvnames.update(lv_list) |
237 |
return lvnames
|
238 |
|
239 |
def _AllIDs(self, include_temporary): |
240 |
"""Compute the list of all UUIDs and names we have.
|
241 |
|
242 |
@type include_temporary: boolean
|
243 |
@param include_temporary: whether to include the _temporary_ids set
|
244 |
@rtype: set
|
245 |
@return: a set of IDs
|
246 |
|
247 |
"""
|
248 |
existing = set()
|
249 |
if include_temporary:
|
250 |
existing.update(self._temporary_ids.GetReserved())
|
251 |
existing.update(self._AllLVs())
|
252 |
existing.update(self._config_data.instances.keys())
|
253 |
existing.update(self._config_data.nodes.keys())
|
254 |
existing.update([i.uuid for i in self._AllUUIDObjects() if i.uuid]) |
255 |
return existing
|
256 |
|
257 |
def _GenerateUniqueID(self, ec_id): |
258 |
"""Generate an unique UUID.
|
259 |
|
260 |
This checks the current node, instances and disk names for
|
261 |
duplicates.
|
262 |
|
263 |
@rtype: string
|
264 |
@return: the unique id
|
265 |
|
266 |
"""
|
267 |
existing = self._AllIDs(include_temporary=False) |
268 |
return self._temporary_ids.Generate(existing, utils.NewUUID, ec_id) |
269 |
|
270 |
@locking.ssynchronized(_config_lock, shared=1) |
271 |
def GenerateUniqueID(self, ec_id): |
272 |
"""Generate an unique ID.
|
273 |
|
274 |
This is just a wrapper over the unlocked version.
|
275 |
|
276 |
@type ec_id: string
|
277 |
@param ec_id: unique id for the job to reserve the id to
|
278 |
|
279 |
"""
|
280 |
return self._GenerateUniqueID(ec_id) |
281 |
|
282 |
def _AllMACs(self): |
283 |
"""Return all MACs present in the config.
|
284 |
|
285 |
@rtype: list
|
286 |
@return: the list of all MACs
|
287 |
|
288 |
"""
|
289 |
result = [] |
290 |
for instance in self._config_data.instances.values(): |
291 |
for nic in instance.nics: |
292 |
result.append(nic.mac) |
293 |
|
294 |
return result
|
295 |
|
296 |
def _AllDRBDSecrets(self): |
297 |
"""Return all DRBD secrets present in the config.
|
298 |
|
299 |
@rtype: list
|
300 |
@return: the list of all DRBD secrets
|
301 |
|
302 |
"""
|
303 |
def helper(disk, result): |
304 |
"""Recursively gather secrets from this disk."""
|
305 |
if disk.dev_type == constants.DT_DRBD8:
|
306 |
result.append(disk.logical_id[5])
|
307 |
if disk.children:
|
308 |
for child in disk.children: |
309 |
helper(child, result) |
310 |
|
311 |
result = [] |
312 |
for instance in self._config_data.instances.values(): |
313 |
for disk in instance.disks: |
314 |
helper(disk, result) |
315 |
|
316 |
return result
|
317 |
|
318 |
def _CheckDiskIDs(self, disk, l_ids, p_ids): |
319 |
"""Compute duplicate disk IDs
|
320 |
|
321 |
@type disk: L{objects.Disk}
|
322 |
@param disk: the disk at which to start searching
|
323 |
@type l_ids: list
|
324 |
@param l_ids: list of current logical ids
|
325 |
@type p_ids: list
|
326 |
@param p_ids: list of current physical ids
|
327 |
@rtype: list
|
328 |
@return: a list of error messages
|
329 |
|
330 |
"""
|
331 |
result = [] |
332 |
if disk.logical_id is not None: |
333 |
if disk.logical_id in l_ids: |
334 |
result.append("duplicate logical id %s" % str(disk.logical_id)) |
335 |
else:
|
336 |
l_ids.append(disk.logical_id) |
337 |
if disk.physical_id is not None: |
338 |
if disk.physical_id in p_ids: |
339 |
result.append("duplicate physical id %s" % str(disk.physical_id)) |
340 |
else:
|
341 |
p_ids.append(disk.physical_id) |
342 |
|
343 |
if disk.children:
|
344 |
for child in disk.children: |
345 |
result.extend(self._CheckDiskIDs(child, l_ids, p_ids))
|
346 |
return result
|
347 |
|
348 |
def _UnlockedVerifyConfig(self): |
349 |
"""Verify function.
|
350 |
|
351 |
@rtype: list
|
352 |
@return: a list of error messages; a non-empty list signifies
|
353 |
configuration errors
|
354 |
|
355 |
"""
|
356 |
result = [] |
357 |
seen_macs = [] |
358 |
ports = {} |
359 |
data = self._config_data
|
360 |
seen_lids = [] |
361 |
seen_pids = [] |
362 |
|
363 |
# global cluster checks
|
364 |
if not data.cluster.enabled_hypervisors: |
365 |
result.append("enabled hypervisors list doesn't have any entries")
|
366 |
invalid_hvs = set(data.cluster.enabled_hypervisors) - constants.HYPER_TYPES
|
367 |
if invalid_hvs:
|
368 |
result.append("enabled hypervisors contains invalid entries: %s" %
|
369 |
invalid_hvs) |
370 |
missing_hvp = (set(data.cluster.enabled_hypervisors) -
|
371 |
set(data.cluster.hvparams.keys()))
|
372 |
if missing_hvp:
|
373 |
result.append("hypervisor parameters missing for the enabled"
|
374 |
" hypervisor(s) %s" % utils.CommaJoin(missing_hvp))
|
375 |
|
376 |
if data.cluster.master_node not in data.nodes: |
377 |
result.append("cluster has invalid primary node '%s'" %
|
378 |
data.cluster.master_node) |
379 |
|
380 |
# per-instance checks
|
381 |
for instance_name in data.instances: |
382 |
instance = data.instances[instance_name] |
383 |
if instance.name != instance_name:
|
384 |
result.append("instance '%s' is indexed by wrong name '%s'" %
|
385 |
(instance.name, instance_name)) |
386 |
if instance.primary_node not in data.nodes: |
387 |
result.append("instance '%s' has invalid primary node '%s'" %
|
388 |
(instance_name, instance.primary_node)) |
389 |
for snode in instance.secondary_nodes: |
390 |
if snode not in data.nodes: |
391 |
result.append("instance '%s' has invalid secondary node '%s'" %
|
392 |
(instance_name, snode)) |
393 |
for idx, nic in enumerate(instance.nics): |
394 |
if nic.mac in seen_macs: |
395 |
result.append("instance '%s' has NIC %d mac %s duplicate" %
|
396 |
(instance_name, idx, nic.mac)) |
397 |
else:
|
398 |
seen_macs.append(nic.mac) |
399 |
|
400 |
# gather the drbd ports for duplicate checks
|
401 |
for dsk in instance.disks: |
402 |
if dsk.dev_type in constants.LDS_DRBD: |
403 |
tcp_port = dsk.logical_id[2]
|
404 |
if tcp_port not in ports: |
405 |
ports[tcp_port] = [] |
406 |
ports[tcp_port].append((instance.name, "drbd disk %s" % dsk.iv_name))
|
407 |
# gather network port reservation
|
408 |
net_port = getattr(instance, "network_port", None) |
409 |
if net_port is not None: |
410 |
if net_port not in ports: |
411 |
ports[net_port] = [] |
412 |
ports[net_port].append((instance.name, "network port"))
|
413 |
|
414 |
# instance disk verify
|
415 |
for idx, disk in enumerate(instance.disks): |
416 |
result.extend(["instance '%s' disk %d error: %s" %
|
417 |
(instance.name, idx, msg) for msg in disk.Verify()]) |
418 |
result.extend(self._CheckDiskIDs(disk, seen_lids, seen_pids))
|
419 |
|
420 |
# cluster-wide pool of free ports
|
421 |
for free_port in data.cluster.tcpudp_port_pool: |
422 |
if free_port not in ports: |
423 |
ports[free_port] = [] |
424 |
ports[free_port].append(("cluster", "port marked as free")) |
425 |
|
426 |
# compute tcp/udp duplicate ports
|
427 |
keys = ports.keys() |
428 |
keys.sort() |
429 |
for pnum in keys: |
430 |
pdata = ports[pnum] |
431 |
if len(pdata) > 1: |
432 |
txt = utils.CommaJoin(["%s/%s" % val for val in pdata]) |
433 |
result.append("tcp/udp port %s has duplicates: %s" % (pnum, txt))
|
434 |
|
435 |
# highest used tcp port check
|
436 |
if keys:
|
437 |
if keys[-1] > data.cluster.highest_used_port: |
438 |
result.append("Highest used port mismatch, saved %s, computed %s" %
|
439 |
(data.cluster.highest_used_port, keys[-1]))
|
440 |
|
441 |
if not data.nodes[data.cluster.master_node].master_candidate: |
442 |
result.append("Master node is not a master candidate")
|
443 |
|
444 |
# master candidate checks
|
445 |
mc_now, mc_max, _ = self._UnlockedGetMasterCandidateStats()
|
446 |
if mc_now < mc_max:
|
447 |
result.append("Not enough master candidates: actual %d, target %d" %
|
448 |
(mc_now, mc_max)) |
449 |
|
450 |
# node checks
|
451 |
for node_name, node in data.nodes.items(): |
452 |
if node.name != node_name:
|
453 |
result.append("Node '%s' is indexed by wrong name '%s'" %
|
454 |
(node.name, node_name)) |
455 |
if [node.master_candidate, node.drained, node.offline].count(True) > 1: |
456 |
result.append("Node %s state is invalid: master_candidate=%s,"
|
457 |
" drain=%s, offline=%s" %
|
458 |
(node.name, node.master_candidate, node.drain, |
459 |
node.offline)) |
460 |
|
461 |
# nodegroups checks
|
462 |
nodegroups_names = set()
|
463 |
for nodegroup_uuid in data.nodegroups: |
464 |
nodegroup = data.nodegroups[nodegroup_uuid] |
465 |
if nodegroup.uuid != nodegroup_uuid:
|
466 |
result.append("nodegroup '%s' (uuid: '%s') indexed by wrong uuid '%s'"
|
467 |
% (nodegroup.name, nodegroup.uuid, nodegroup_uuid)) |
468 |
if utils.UUID_RE.match(nodegroup.name.lower()):
|
469 |
result.append("nodegroup '%s' (uuid: '%s') has uuid-like name" %
|
470 |
(nodegroup.name, nodegroup.uuid)) |
471 |
if nodegroup.name in nodegroups_names: |
472 |
result.append("duplicate nodegroup name '%s'" % nodegroup.name)
|
473 |
else:
|
474 |
nodegroups_names.add(nodegroup.name) |
475 |
|
476 |
# drbd minors check
|
477 |
_, duplicates = self._UnlockedComputeDRBDMap()
|
478 |
for node, minor, instance_a, instance_b in duplicates: |
479 |
result.append("DRBD minor %d on node %s is assigned twice to instances"
|
480 |
" %s and %s" % (minor, node, instance_a, instance_b))
|
481 |
|
482 |
# IP checks
|
483 |
default_nicparams = data.cluster.nicparams[constants.PP_DEFAULT] |
484 |
ips = {} |
485 |
|
486 |
def _AddIpAddress(ip, name): |
487 |
ips.setdefault(ip, []).append(name) |
488 |
|
489 |
_AddIpAddress(data.cluster.master_ip, "cluster_ip")
|
490 |
|
491 |
for node in data.nodes.values(): |
492 |
_AddIpAddress(node.primary_ip, "node:%s/primary" % node.name)
|
493 |
if node.secondary_ip != node.primary_ip:
|
494 |
_AddIpAddress(node.secondary_ip, "node:%s/secondary" % node.name)
|
495 |
|
496 |
for instance in data.instances.values(): |
497 |
for idx, nic in enumerate(instance.nics): |
498 |
if nic.ip is None: |
499 |
continue
|
500 |
|
501 |
nicparams = objects.FillDict(default_nicparams, nic.nicparams) |
502 |
nic_mode = nicparams[constants.NIC_MODE] |
503 |
nic_link = nicparams[constants.NIC_LINK] |
504 |
|
505 |
if nic_mode == constants.NIC_MODE_BRIDGED:
|
506 |
link = "bridge:%s" % nic_link
|
507 |
elif nic_mode == constants.NIC_MODE_ROUTED:
|
508 |
link = "route:%s" % nic_link
|
509 |
else:
|
510 |
raise errors.ProgrammerError("NIC mode '%s' not handled" % nic_mode) |
511 |
|
512 |
_AddIpAddress("%s/%s" % (link, nic.ip),
|
513 |
"instance:%s/nic:%d" % (instance.name, idx))
|
514 |
|
515 |
for ip, owners in ips.items(): |
516 |
if len(owners) > 1: |
517 |
result.append("IP address %s is used by multiple owners: %s" %
|
518 |
(ip, utils.CommaJoin(owners))) |
519 |
|
520 |
return result
|
521 |
|
522 |
@locking.ssynchronized(_config_lock, shared=1) |
523 |
def VerifyConfig(self): |
524 |
"""Verify function.
|
525 |
|
526 |
This is just a wrapper over L{_UnlockedVerifyConfig}.
|
527 |
|
528 |
@rtype: list
|
529 |
@return: a list of error messages; a non-empty list signifies
|
530 |
configuration errors
|
531 |
|
532 |
"""
|
533 |
return self._UnlockedVerifyConfig() |
534 |
|
535 |
def _UnlockedSetDiskID(self, disk, node_name): |
536 |
"""Convert the unique ID to the ID needed on the target nodes.
|
537 |
|
538 |
This is used only for drbd, which needs ip/port configuration.
|
539 |
|
540 |
The routine descends down and updates its children also, because
|
541 |
this helps when the only the top device is passed to the remote
|
542 |
node.
|
543 |
|
544 |
This function is for internal use, when the config lock is already held.
|
545 |
|
546 |
"""
|
547 |
if disk.children:
|
548 |
for child in disk.children: |
549 |
self._UnlockedSetDiskID(child, node_name)
|
550 |
|
551 |
if disk.logical_id is None and disk.physical_id is not None: |
552 |
return
|
553 |
if disk.dev_type == constants.LD_DRBD8:
|
554 |
pnode, snode, port, pminor, sminor, secret = disk.logical_id |
555 |
if node_name not in (pnode, snode): |
556 |
raise errors.ConfigurationError("DRBD device not knowing node %s" % |
557 |
node_name) |
558 |
pnode_info = self._UnlockedGetNodeInfo(pnode)
|
559 |
snode_info = self._UnlockedGetNodeInfo(snode)
|
560 |
if pnode_info is None or snode_info is None: |
561 |
raise errors.ConfigurationError("Can't find primary or secondary node" |
562 |
" for %s" % str(disk)) |
563 |
p_data = (pnode_info.secondary_ip, port) |
564 |
s_data = (snode_info.secondary_ip, port) |
565 |
if pnode == node_name:
|
566 |
disk.physical_id = p_data + s_data + (pminor, secret) |
567 |
else: # it must be secondary, we tested above |
568 |
disk.physical_id = s_data + p_data + (sminor, secret) |
569 |
else:
|
570 |
disk.physical_id = disk.logical_id |
571 |
return
|
572 |
|
573 |
@locking.ssynchronized(_config_lock)
|
574 |
def SetDiskID(self, disk, node_name): |
575 |
"""Convert the unique ID to the ID needed on the target nodes.
|
576 |
|
577 |
This is used only for drbd, which needs ip/port configuration.
|
578 |
|
579 |
The routine descends down and updates its children also, because
|
580 |
this helps when the only the top device is passed to the remote
|
581 |
node.
|
582 |
|
583 |
"""
|
584 |
return self._UnlockedSetDiskID(disk, node_name) |
585 |
|
586 |
@locking.ssynchronized(_config_lock)
|
587 |
def AddTcpUdpPort(self, port): |
588 |
"""Adds a new port to the available port pool.
|
589 |
|
590 |
"""
|
591 |
if not isinstance(port, int): |
592 |
raise errors.ProgrammerError("Invalid type passed for port") |
593 |
|
594 |
self._config_data.cluster.tcpudp_port_pool.add(port)
|
595 |
self._WriteConfig()
|
596 |
|
597 |
@locking.ssynchronized(_config_lock, shared=1) |
598 |
def GetPortList(self): |
599 |
"""Returns a copy of the current port list.
|
600 |
|
601 |
"""
|
602 |
return self._config_data.cluster.tcpudp_port_pool.copy() |
603 |
|
604 |
@locking.ssynchronized(_config_lock)
|
605 |
def AllocatePort(self): |
606 |
"""Allocate a port.
|
607 |
|
608 |
The port will be taken from the available port pool or from the
|
609 |
default port range (and in this case we increase
|
610 |
highest_used_port).
|
611 |
|
612 |
"""
|
613 |
# If there are TCP/IP ports configured, we use them first.
|
614 |
if self._config_data.cluster.tcpudp_port_pool: |
615 |
port = self._config_data.cluster.tcpudp_port_pool.pop()
|
616 |
else:
|
617 |
port = self._config_data.cluster.highest_used_port + 1 |
618 |
if port >= constants.LAST_DRBD_PORT:
|
619 |
raise errors.ConfigurationError("The highest used port is greater" |
620 |
" than %s. Aborting." %
|
621 |
constants.LAST_DRBD_PORT) |
622 |
self._config_data.cluster.highest_used_port = port
|
623 |
|
624 |
self._WriteConfig()
|
625 |
return port
|
626 |
|
627 |
def _UnlockedComputeDRBDMap(self): |
628 |
"""Compute the used DRBD minor/nodes.
|
629 |
|
630 |
@rtype: (dict, list)
|
631 |
@return: dictionary of node_name: dict of minor: instance_name;
|
632 |
the returned dict will have all the nodes in it (even if with
|
633 |
an empty list), and a list of duplicates; if the duplicates
|
634 |
list is not empty, the configuration is corrupted and its caller
|
635 |
should raise an exception
|
636 |
|
637 |
"""
|
638 |
def _AppendUsedPorts(instance_name, disk, used): |
639 |
duplicates = [] |
640 |
if disk.dev_type == constants.LD_DRBD8 and len(disk.logical_id) >= 5: |
641 |
node_a, node_b, _, minor_a, minor_b = disk.logical_id[:5]
|
642 |
for node, port in ((node_a, minor_a), (node_b, minor_b)): |
643 |
assert node in used, ("Node '%s' of instance '%s' not found" |
644 |
" in node list" % (node, instance_name))
|
645 |
if port in used[node]: |
646 |
duplicates.append((node, port, instance_name, used[node][port])) |
647 |
else:
|
648 |
used[node][port] = instance_name |
649 |
if disk.children:
|
650 |
for child in disk.children: |
651 |
duplicates.extend(_AppendUsedPorts(instance_name, child, used)) |
652 |
return duplicates
|
653 |
|
654 |
duplicates = [] |
655 |
my_dict = dict((node, {}) for node in self._config_data.nodes) |
656 |
for instance in self._config_data.instances.itervalues(): |
657 |
for disk in instance.disks: |
658 |
duplicates.extend(_AppendUsedPorts(instance.name, disk, my_dict)) |
659 |
for (node, minor), instance in self._temporary_drbds.iteritems(): |
660 |
if minor in my_dict[node] and my_dict[node][minor] != instance: |
661 |
duplicates.append((node, minor, instance, my_dict[node][minor])) |
662 |
else:
|
663 |
my_dict[node][minor] = instance |
664 |
return my_dict, duplicates
|
665 |
|
666 |
@locking.ssynchronized(_config_lock)
|
667 |
def ComputeDRBDMap(self): |
668 |
"""Compute the used DRBD minor/nodes.
|
669 |
|
670 |
This is just a wrapper over L{_UnlockedComputeDRBDMap}.
|
671 |
|
672 |
@return: dictionary of node_name: dict of minor: instance_name;
|
673 |
the returned dict will have all the nodes in it (even if with
|
674 |
an empty list).
|
675 |
|
676 |
"""
|
677 |
d_map, duplicates = self._UnlockedComputeDRBDMap()
|
678 |
if duplicates:
|
679 |
raise errors.ConfigurationError("Duplicate DRBD ports detected: %s" % |
680 |
str(duplicates))
|
681 |
return d_map
|
682 |
|
683 |
@locking.ssynchronized(_config_lock)
|
684 |
def AllocateDRBDMinor(self, nodes, instance): |
685 |
"""Allocate a drbd minor.
|
686 |
|
687 |
The free minor will be automatically computed from the existing
|
688 |
devices. A node can be given multiple times in order to allocate
|
689 |
multiple minors. The result is the list of minors, in the same
|
690 |
order as the passed nodes.
|
691 |
|
692 |
@type instance: string
|
693 |
@param instance: the instance for which we allocate minors
|
694 |
|
695 |
"""
|
696 |
assert isinstance(instance, basestring), \ |
697 |
"Invalid argument '%s' passed to AllocateDRBDMinor" % instance
|
698 |
|
699 |
d_map, duplicates = self._UnlockedComputeDRBDMap()
|
700 |
if duplicates:
|
701 |
raise errors.ConfigurationError("Duplicate DRBD ports detected: %s" % |
702 |
str(duplicates))
|
703 |
result = [] |
704 |
for nname in nodes: |
705 |
ndata = d_map[nname] |
706 |
if not ndata: |
707 |
# no minors used, we can start at 0
|
708 |
result.append(0)
|
709 |
ndata[0] = instance
|
710 |
self._temporary_drbds[(nname, 0)] = instance |
711 |
continue
|
712 |
keys = ndata.keys() |
713 |
keys.sort() |
714 |
ffree = utils.FirstFree(keys) |
715 |
if ffree is None: |
716 |
# return the next minor
|
717 |
# TODO: implement high-limit check
|
718 |
minor = keys[-1] + 1 |
719 |
else:
|
720 |
minor = ffree |
721 |
# double-check minor against current instances
|
722 |
assert minor not in d_map[nname], \ |
723 |
("Attempt to reuse allocated DRBD minor %d on node %s,"
|
724 |
" already allocated to instance %s" %
|
725 |
(minor, nname, d_map[nname][minor])) |
726 |
ndata[minor] = instance |
727 |
# double-check minor against reservation
|
728 |
r_key = (nname, minor) |
729 |
assert r_key not in self._temporary_drbds, \ |
730 |
("Attempt to reuse reserved DRBD minor %d on node %s,"
|
731 |
" reserved for instance %s" %
|
732 |
(minor, nname, self._temporary_drbds[r_key]))
|
733 |
self._temporary_drbds[r_key] = instance
|
734 |
result.append(minor) |
735 |
logging.debug("Request to allocate drbd minors, input: %s, returning %s",
|
736 |
nodes, result) |
737 |
return result
|
738 |
|
739 |
def _UnlockedReleaseDRBDMinors(self, instance): |
740 |
"""Release temporary drbd minors allocated for a given instance.
|
741 |
|
742 |
@type instance: string
|
743 |
@param instance: the instance for which temporary minors should be
|
744 |
released
|
745 |
|
746 |
"""
|
747 |
assert isinstance(instance, basestring), \ |
748 |
"Invalid argument passed to ReleaseDRBDMinors"
|
749 |
for key, name in self._temporary_drbds.items(): |
750 |
if name == instance:
|
751 |
del self._temporary_drbds[key] |
752 |
|
753 |
@locking.ssynchronized(_config_lock)
|
754 |
def ReleaseDRBDMinors(self, instance): |
755 |
"""Release temporary drbd minors allocated for a given instance.
|
756 |
|
757 |
This should be called on the error paths, on the success paths
|
758 |
it's automatically called by the ConfigWriter add and update
|
759 |
functions.
|
760 |
|
761 |
This function is just a wrapper over L{_UnlockedReleaseDRBDMinors}.
|
762 |
|
763 |
@type instance: string
|
764 |
@param instance: the instance for which temporary minors should be
|
765 |
released
|
766 |
|
767 |
"""
|
768 |
self._UnlockedReleaseDRBDMinors(instance)
|
769 |
|
770 |
@locking.ssynchronized(_config_lock, shared=1) |
771 |
def GetConfigVersion(self): |
772 |
"""Get the configuration version.
|
773 |
|
774 |
@return: Config version
|
775 |
|
776 |
"""
|
777 |
return self._config_data.version |
778 |
|
779 |
@locking.ssynchronized(_config_lock, shared=1) |
780 |
def GetClusterName(self): |
781 |
"""Get cluster name.
|
782 |
|
783 |
@return: Cluster name
|
784 |
|
785 |
"""
|
786 |
return self._config_data.cluster.cluster_name |
787 |
|
788 |
@locking.ssynchronized(_config_lock, shared=1) |
789 |
def GetMasterNode(self): |
790 |
"""Get the hostname of the master node for this cluster.
|
791 |
|
792 |
@return: Master hostname
|
793 |
|
794 |
"""
|
795 |
return self._config_data.cluster.master_node |
796 |
|
797 |
@locking.ssynchronized(_config_lock, shared=1) |
798 |
def GetMasterIP(self): |
799 |
"""Get the IP of the master node for this cluster.
|
800 |
|
801 |
@return: Master IP
|
802 |
|
803 |
"""
|
804 |
return self._config_data.cluster.master_ip |
805 |
|
806 |
@locking.ssynchronized(_config_lock, shared=1) |
807 |
def GetMasterNetdev(self): |
808 |
"""Get the master network device for this cluster.
|
809 |
|
810 |
"""
|
811 |
return self._config_data.cluster.master_netdev |
812 |
|
813 |
@locking.ssynchronized(_config_lock, shared=1) |
814 |
def GetFileStorageDir(self): |
815 |
"""Get the file storage dir for this cluster.
|
816 |
|
817 |
"""
|
818 |
return self._config_data.cluster.file_storage_dir |
819 |
|
820 |
@locking.ssynchronized(_config_lock, shared=1) |
821 |
def GetHypervisorType(self): |
822 |
"""Get the hypervisor type for this cluster.
|
823 |
|
824 |
"""
|
825 |
return self._config_data.cluster.enabled_hypervisors[0] |
826 |
|
827 |
@locking.ssynchronized(_config_lock, shared=1) |
828 |
def GetHostKey(self): |
829 |
"""Return the rsa hostkey from the config.
|
830 |
|
831 |
@rtype: string
|
832 |
@return: the rsa hostkey
|
833 |
|
834 |
"""
|
835 |
return self._config_data.cluster.rsahostkeypub |
836 |
|
837 |
@locking.ssynchronized(_config_lock, shared=1) |
838 |
def GetDefaultIAllocator(self): |
839 |
"""Get the default instance allocator for this cluster.
|
840 |
|
841 |
"""
|
842 |
return self._config_data.cluster.default_iallocator |
843 |
|
844 |
@locking.ssynchronized(_config_lock, shared=1) |
845 |
def GetPrimaryIPFamily(self): |
846 |
"""Get cluster primary ip family.
|
847 |
|
848 |
@return: primary ip family
|
849 |
|
850 |
"""
|
851 |
return self._config_data.cluster.primary_ip_family |
852 |
|
853 |
@locking.ssynchronized(_config_lock, shared=1) |
854 |
def LookupNodeGroup(self, target): |
855 |
"""Lookup a node group.
|
856 |
|
857 |
@type target: string or None
|
858 |
@param target: group name or uuid or None to look for the default
|
859 |
@rtype: string
|
860 |
@return: nodegroup uuid
|
861 |
@raises errors.OpPrereqError: when the target group cannot be found
|
862 |
|
863 |
"""
|
864 |
if target is None: |
865 |
if len(self._config_data.nodegroups) != 1: |
866 |
raise errors.OpPrereqError("More than one nodegroup exists. Target" |
867 |
" group must be specified explicitely.")
|
868 |
else:
|
869 |
return self._config_data.nodegroups.keys()[0] |
870 |
if target in self._config_data.nodegroups: |
871 |
return target
|
872 |
for nodegroup in self._config_data.nodegroups.values(): |
873 |
if nodegroup.name == target:
|
874 |
return nodegroup.uuid
|
875 |
raise errors.OpPrereqError("Nodegroup '%s' not found", target) |
876 |
|
877 |
@locking.ssynchronized(_config_lock)
|
878 |
def AddInstance(self, instance, ec_id): |
879 |
"""Add an instance to the config.
|
880 |
|
881 |
This should be used after creating a new instance.
|
882 |
|
883 |
@type instance: L{objects.Instance}
|
884 |
@param instance: the instance object
|
885 |
|
886 |
"""
|
887 |
if not isinstance(instance, objects.Instance): |
888 |
raise errors.ProgrammerError("Invalid type passed to AddInstance") |
889 |
|
890 |
if instance.disk_template != constants.DT_DISKLESS:
|
891 |
all_lvs = instance.MapLVsByNode() |
892 |
logging.info("Instance '%s' DISK_LAYOUT: %s", instance.name, all_lvs)
|
893 |
|
894 |
all_macs = self._AllMACs()
|
895 |
for nic in instance.nics: |
896 |
if nic.mac in all_macs: |
897 |
raise errors.ConfigurationError("Cannot add instance %s:" |
898 |
" MAC address '%s' already in use." %
|
899 |
(instance.name, nic.mac)) |
900 |
|
901 |
self._EnsureUUID(instance, ec_id)
|
902 |
|
903 |
instance.serial_no = 1
|
904 |
instance.ctime = instance.mtime = time.time() |
905 |
self._config_data.instances[instance.name] = instance
|
906 |
self._config_data.cluster.serial_no += 1 |
907 |
self._UnlockedReleaseDRBDMinors(instance.name)
|
908 |
self._WriteConfig()
|
909 |
|
910 |
def _EnsureUUID(self, item, ec_id): |
911 |
"""Ensures a given object has a valid UUID.
|
912 |
|
913 |
@param item: the instance or node to be checked
|
914 |
@param ec_id: the execution context id for the uuid reservation
|
915 |
|
916 |
"""
|
917 |
if not item.uuid: |
918 |
item.uuid = self._GenerateUniqueID(ec_id)
|
919 |
elif item.uuid in self._AllIDs(include_temporary=True): |
920 |
raise errors.ConfigurationError("Cannot add '%s': UUID %s already" |
921 |
" in use" % (item.name, item.uuid))
|
922 |
|
923 |
def _SetInstanceStatus(self, instance_name, status): |
924 |
"""Set the instance's status to a given value.
|
925 |
|
926 |
"""
|
927 |
assert isinstance(status, bool), \ |
928 |
"Invalid status '%s' passed to SetInstanceStatus" % (status,)
|
929 |
|
930 |
if instance_name not in self._config_data.instances: |
931 |
raise errors.ConfigurationError("Unknown instance '%s'" % |
932 |
instance_name) |
933 |
instance = self._config_data.instances[instance_name]
|
934 |
if instance.admin_up != status:
|
935 |
instance.admin_up = status |
936 |
instance.serial_no += 1
|
937 |
instance.mtime = time.time() |
938 |
self._WriteConfig()
|
939 |
|
940 |
@locking.ssynchronized(_config_lock)
|
941 |
def MarkInstanceUp(self, instance_name): |
942 |
"""Mark the instance status to up in the config.
|
943 |
|
944 |
"""
|
945 |
self._SetInstanceStatus(instance_name, True) |
946 |
|
947 |
@locking.ssynchronized(_config_lock)
|
948 |
def RemoveInstance(self, instance_name): |
949 |
"""Remove the instance from the configuration.
|
950 |
|
951 |
"""
|
952 |
if instance_name not in self._config_data.instances: |
953 |
raise errors.ConfigurationError("Unknown instance '%s'" % instance_name) |
954 |
del self._config_data.instances[instance_name] |
955 |
self._config_data.cluster.serial_no += 1 |
956 |
self._WriteConfig()
|
957 |
|
958 |
@locking.ssynchronized(_config_lock)
|
959 |
def RenameInstance(self, old_name, new_name): |
960 |
"""Rename an instance.
|
961 |
|
962 |
This needs to be done in ConfigWriter and not by RemoveInstance
|
963 |
combined with AddInstance as only we can guarantee an atomic
|
964 |
rename.
|
965 |
|
966 |
"""
|
967 |
if old_name not in self._config_data.instances: |
968 |
raise errors.ConfigurationError("Unknown instance '%s'" % old_name) |
969 |
inst = self._config_data.instances[old_name]
|
970 |
del self._config_data.instances[old_name] |
971 |
inst.name = new_name |
972 |
|
973 |
for disk in inst.disks: |
974 |
if disk.dev_type == constants.LD_FILE:
|
975 |
# rename the file paths in logical and physical id
|
976 |
file_storage_dir = os.path.dirname(os.path.dirname(disk.logical_id[1]))
|
977 |
disk.physical_id = disk.logical_id = (disk.logical_id[0],
|
978 |
utils.PathJoin(file_storage_dir, |
979 |
inst.name, |
980 |
disk.iv_name)) |
981 |
|
982 |
self._config_data.instances[inst.name] = inst
|
983 |
self._WriteConfig()
|
984 |
|
985 |
@locking.ssynchronized(_config_lock)
|
986 |
def MarkInstanceDown(self, instance_name): |
987 |
"""Mark the status of an instance to down in the configuration.
|
988 |
|
989 |
"""
|
990 |
self._SetInstanceStatus(instance_name, False) |
991 |
|
992 |
def _UnlockedGetInstanceList(self): |
993 |
"""Get the list of instances.
|
994 |
|
995 |
This function is for internal use, when the config lock is already held.
|
996 |
|
997 |
"""
|
998 |
return self._config_data.instances.keys() |
999 |
|
1000 |
@locking.ssynchronized(_config_lock, shared=1) |
1001 |
def GetInstanceList(self): |
1002 |
"""Get the list of instances.
|
1003 |
|
1004 |
@return: array of instances, ex. ['instance2.example.com',
|
1005 |
'instance1.example.com']
|
1006 |
|
1007 |
"""
|
1008 |
return self._UnlockedGetInstanceList() |
1009 |
|
1010 |
@locking.ssynchronized(_config_lock, shared=1) |
1011 |
def ExpandInstanceName(self, short_name): |
1012 |
"""Attempt to expand an incomplete instance name.
|
1013 |
|
1014 |
"""
|
1015 |
return utils.MatchNameComponent(short_name,
|
1016 |
self._config_data.instances.keys(),
|
1017 |
case_sensitive=False)
|
1018 |
|
1019 |
def _UnlockedGetInstanceInfo(self, instance_name): |
1020 |
"""Returns information about an instance.
|
1021 |
|
1022 |
This function is for internal use, when the config lock is already held.
|
1023 |
|
1024 |
"""
|
1025 |
if instance_name not in self._config_data.instances: |
1026 |
return None |
1027 |
|
1028 |
return self._config_data.instances[instance_name] |
1029 |
|
1030 |
@locking.ssynchronized(_config_lock, shared=1) |
1031 |
def GetInstanceInfo(self, instance_name): |
1032 |
"""Returns information about an instance.
|
1033 |
|
1034 |
It takes the information from the configuration file. Other information of
|
1035 |
an instance are taken from the live systems.
|
1036 |
|
1037 |
@param instance_name: name of the instance, e.g.
|
1038 |
I{instance1.example.com}
|
1039 |
|
1040 |
@rtype: L{objects.Instance}
|
1041 |
@return: the instance object
|
1042 |
|
1043 |
"""
|
1044 |
return self._UnlockedGetInstanceInfo(instance_name) |
1045 |
|
1046 |
@locking.ssynchronized(_config_lock, shared=1) |
1047 |
def GetAllInstancesInfo(self): |
1048 |
"""Get the configuration of all instances.
|
1049 |
|
1050 |
@rtype: dict
|
1051 |
@return: dict of (instance, instance_info), where instance_info is what
|
1052 |
would GetInstanceInfo return for the node
|
1053 |
|
1054 |
"""
|
1055 |
my_dict = dict([(instance, self._UnlockedGetInstanceInfo(instance)) |
1056 |
for instance in self._UnlockedGetInstanceList()]) |
1057 |
return my_dict
|
1058 |
|
1059 |
@locking.ssynchronized(_config_lock)
|
1060 |
def AddNode(self, node, ec_id): |
1061 |
"""Add a node to the configuration.
|
1062 |
|
1063 |
@type node: L{objects.Node}
|
1064 |
@param node: a Node instance
|
1065 |
|
1066 |
"""
|
1067 |
logging.info("Adding node %s to configuration", node.name)
|
1068 |
|
1069 |
self._EnsureUUID(node, ec_id)
|
1070 |
|
1071 |
node.serial_no = 1
|
1072 |
node.ctime = node.mtime = time.time() |
1073 |
self._UnlockedAddNodeToGroup(node.name, node.nodegroup)
|
1074 |
self._config_data.nodes[node.name] = node
|
1075 |
self._config_data.cluster.serial_no += 1 |
1076 |
self._WriteConfig()
|
1077 |
|
1078 |
@locking.ssynchronized(_config_lock)
|
1079 |
def RemoveNode(self, node_name): |
1080 |
"""Remove a node from the configuration.
|
1081 |
|
1082 |
"""
|
1083 |
logging.info("Removing node %s from configuration", node_name)
|
1084 |
|
1085 |
if node_name not in self._config_data.nodes: |
1086 |
raise errors.ConfigurationError("Unknown node '%s'" % node_name) |
1087 |
|
1088 |
self._UnlockedRemoveNodeFromGroup(self._config_data.nodes[node_name]) |
1089 |
del self._config_data.nodes[node_name] |
1090 |
self._config_data.cluster.serial_no += 1 |
1091 |
self._WriteConfig()
|
1092 |
|
1093 |
@locking.ssynchronized(_config_lock, shared=1) |
1094 |
def ExpandNodeName(self, short_name): |
1095 |
"""Attempt to expand an incomplete instance name.
|
1096 |
|
1097 |
"""
|
1098 |
return utils.MatchNameComponent(short_name,
|
1099 |
self._config_data.nodes.keys(),
|
1100 |
case_sensitive=False)
|
1101 |
|
1102 |
def _UnlockedGetNodeInfo(self, node_name): |
1103 |
"""Get the configuration of a node, as stored in the config.
|
1104 |
|
1105 |
This function is for internal use, when the config lock is already
|
1106 |
held.
|
1107 |
|
1108 |
@param node_name: the node name, e.g. I{node1.example.com}
|
1109 |
|
1110 |
@rtype: L{objects.Node}
|
1111 |
@return: the node object
|
1112 |
|
1113 |
"""
|
1114 |
if node_name not in self._config_data.nodes: |
1115 |
return None |
1116 |
|
1117 |
return self._config_data.nodes[node_name] |
1118 |
|
1119 |
@locking.ssynchronized(_config_lock, shared=1) |
1120 |
def GetNodeInfo(self, node_name): |
1121 |
"""Get the configuration of a node, as stored in the config.
|
1122 |
|
1123 |
This is just a locked wrapper over L{_UnlockedGetNodeInfo}.
|
1124 |
|
1125 |
@param node_name: the node name, e.g. I{node1.example.com}
|
1126 |
|
1127 |
@rtype: L{objects.Node}
|
1128 |
@return: the node object
|
1129 |
|
1130 |
"""
|
1131 |
return self._UnlockedGetNodeInfo(node_name) |
1132 |
|
1133 |
def _UnlockedGetNodeList(self): |
1134 |
"""Return the list of nodes which are in the configuration.
|
1135 |
|
1136 |
This function is for internal use, when the config lock is already
|
1137 |
held.
|
1138 |
|
1139 |
@rtype: list
|
1140 |
|
1141 |
"""
|
1142 |
return self._config_data.nodes.keys() |
1143 |
|
1144 |
@locking.ssynchronized(_config_lock, shared=1) |
1145 |
def GetNodeList(self): |
1146 |
"""Return the list of nodes which are in the configuration.
|
1147 |
|
1148 |
"""
|
1149 |
return self._UnlockedGetNodeList() |
1150 |
|
1151 |
def _UnlockedGetOnlineNodeList(self): |
1152 |
"""Return the list of nodes which are online.
|
1153 |
|
1154 |
"""
|
1155 |
all_nodes = [self._UnlockedGetNodeInfo(node)
|
1156 |
for node in self._UnlockedGetNodeList()] |
1157 |
return [node.name for node in all_nodes if not node.offline] |
1158 |
|
1159 |
@locking.ssynchronized(_config_lock, shared=1) |
1160 |
def GetOnlineNodeList(self): |
1161 |
"""Return the list of nodes which are online.
|
1162 |
|
1163 |
"""
|
1164 |
return self._UnlockedGetOnlineNodeList() |
1165 |
|
1166 |
@locking.ssynchronized(_config_lock, shared=1) |
1167 |
def GetAllNodesInfo(self): |
1168 |
"""Get the configuration of all nodes.
|
1169 |
|
1170 |
@rtype: dict
|
1171 |
@return: dict of (node, node_info), where node_info is what
|
1172 |
would GetNodeInfo return for the node
|
1173 |
|
1174 |
"""
|
1175 |
my_dict = dict([(node, self._UnlockedGetNodeInfo(node)) |
1176 |
for node in self._UnlockedGetNodeList()]) |
1177 |
return my_dict
|
1178 |
|
1179 |
def _UnlockedGetMasterCandidateStats(self, exceptions=None): |
1180 |
"""Get the number of current and maximum desired and possible candidates.
|
1181 |
|
1182 |
@type exceptions: list
|
1183 |
@param exceptions: if passed, list of nodes that should be ignored
|
1184 |
@rtype: tuple
|
1185 |
@return: tuple of (current, desired and possible, possible)
|
1186 |
|
1187 |
"""
|
1188 |
mc_now = mc_should = mc_max = 0
|
1189 |
for node in self._config_data.nodes.values(): |
1190 |
if exceptions and node.name in exceptions: |
1191 |
continue
|
1192 |
if not (node.offline or node.drained): |
1193 |
mc_max += 1
|
1194 |
if node.master_candidate:
|
1195 |
mc_now += 1
|
1196 |
mc_should = min(mc_max, self._config_data.cluster.candidate_pool_size) |
1197 |
return (mc_now, mc_should, mc_max)
|
1198 |
|
1199 |
@locking.ssynchronized(_config_lock, shared=1) |
1200 |
def GetMasterCandidateStats(self, exceptions=None): |
1201 |
"""Get the number of current and maximum possible candidates.
|
1202 |
|
1203 |
This is just a wrapper over L{_UnlockedGetMasterCandidateStats}.
|
1204 |
|
1205 |
@type exceptions: list
|
1206 |
@param exceptions: if passed, list of nodes that should be ignored
|
1207 |
@rtype: tuple
|
1208 |
@return: tuple of (current, max)
|
1209 |
|
1210 |
"""
|
1211 |
return self._UnlockedGetMasterCandidateStats(exceptions) |
1212 |
|
1213 |
@locking.ssynchronized(_config_lock)
|
1214 |
def MaintainCandidatePool(self, exceptions): |
1215 |
"""Try to grow the candidate pool to the desired size.
|
1216 |
|
1217 |
@type exceptions: list
|
1218 |
@param exceptions: if passed, list of nodes that should be ignored
|
1219 |
@rtype: list
|
1220 |
@return: list with the adjusted nodes (L{objects.Node} instances)
|
1221 |
|
1222 |
"""
|
1223 |
mc_now, mc_max, _ = self._UnlockedGetMasterCandidateStats(exceptions)
|
1224 |
mod_list = [] |
1225 |
if mc_now < mc_max:
|
1226 |
node_list = self._config_data.nodes.keys()
|
1227 |
random.shuffle(node_list) |
1228 |
for name in node_list: |
1229 |
if mc_now >= mc_max:
|
1230 |
break
|
1231 |
node = self._config_data.nodes[name]
|
1232 |
if (node.master_candidate or node.offline or node.drained or |
1233 |
node.name in exceptions):
|
1234 |
continue
|
1235 |
mod_list.append(node) |
1236 |
node.master_candidate = True
|
1237 |
node.serial_no += 1
|
1238 |
mc_now += 1
|
1239 |
if mc_now != mc_max:
|
1240 |
# this should not happen
|
1241 |
logging.warning("Warning: MaintainCandidatePool didn't manage to"
|
1242 |
" fill the candidate pool (%d/%d)", mc_now, mc_max)
|
1243 |
if mod_list:
|
1244 |
self._config_data.cluster.serial_no += 1 |
1245 |
self._WriteConfig()
|
1246 |
|
1247 |
return mod_list
|
1248 |
|
1249 |
def _UnlockedAddNodeToGroup(self, node_name, nodegroup_uuid): |
1250 |
"""Add a given node to the specified group.
|
1251 |
|
1252 |
"""
|
1253 |
if nodegroup_uuid not in self._config_data.nodegroups: |
1254 |
# This can happen if a node group gets deleted between its lookup and
|
1255 |
# when we're adding the first node to it, since we don't keep a lock in
|
1256 |
# the meantime. It's ok though, as we'll fail cleanly if the node group
|
1257 |
# is not found anymore.
|
1258 |
raise errors.OpExecError("Unknown nodegroup: %s" % nodegroup_uuid) |
1259 |
if node_name not in self._config_data.nodegroups[nodegroup_uuid].members: |
1260 |
self._config_data.nodegroups[nodegroup_uuid].members.append(node_name)
|
1261 |
|
1262 |
def _UnlockedRemoveNodeFromGroup(self, node): |
1263 |
"""Remove a given node from its group.
|
1264 |
|
1265 |
"""
|
1266 |
nodegroup = node.nodegroup |
1267 |
if nodegroup not in self._config_data.nodegroups: |
1268 |
logging.warning("Warning: node '%s' has a non-existing nodegroup '%s'"
|
1269 |
" (while being removed from it)", node.name, nodegroup)
|
1270 |
nodegroup_obj = self._config_data.nodegroups[nodegroup]
|
1271 |
if node.name not in nodegroup_obj.members: |
1272 |
logging.warning("Warning: node '%s' not a member of its nodegroup '%s'"
|
1273 |
" (while being removed from it)", node.name, nodegroup)
|
1274 |
else:
|
1275 |
nodegroup_obj.members.remove(node.name) |
1276 |
|
1277 |
def _BumpSerialNo(self): |
1278 |
"""Bump up the serial number of the config.
|
1279 |
|
1280 |
"""
|
1281 |
self._config_data.serial_no += 1 |
1282 |
self._config_data.mtime = time.time()
|
1283 |
|
1284 |
def _AllUUIDObjects(self): |
1285 |
"""Returns all objects with uuid attributes.
|
1286 |
|
1287 |
"""
|
1288 |
return (self._config_data.instances.values() + |
1289 |
self._config_data.nodes.values() +
|
1290 |
self._config_data.nodegroups.values() +
|
1291 |
[self._config_data.cluster])
|
1292 |
|
1293 |
def _OpenConfig(self): |
1294 |
"""Read the config data from disk.
|
1295 |
|
1296 |
"""
|
1297 |
raw_data = utils.ReadFile(self._cfg_file)
|
1298 |
|
1299 |
try:
|
1300 |
data = objects.ConfigData.FromDict(serializer.Load(raw_data)) |
1301 |
except Exception, err: |
1302 |
raise errors.ConfigurationError(err)
|
1303 |
|
1304 |
# Make sure the configuration has the right version
|
1305 |
_ValidateConfig(data) |
1306 |
|
1307 |
if (not hasattr(data, 'cluster') or |
1308 |
not hasattr(data.cluster, 'rsahostkeypub')): |
1309 |
raise errors.ConfigurationError("Incomplete configuration" |
1310 |
" (missing cluster.rsahostkeypub)")
|
1311 |
|
1312 |
# Upgrade configuration if needed
|
1313 |
data.UpgradeConfig() |
1314 |
|
1315 |
self._config_data = data
|
1316 |
# reset the last serial as -1 so that the next write will cause
|
1317 |
# ssconf update
|
1318 |
self._last_cluster_serial = -1 |
1319 |
|
1320 |
# And finally run our (custom) config upgrade sequence
|
1321 |
self._UpgradeConfig()
|
1322 |
|
1323 |
def _UpgradeConfig(self): |
1324 |
"""Run upgrade steps that cannot be done purely in the objects.
|
1325 |
|
1326 |
This is because some data elements need uniqueness across the
|
1327 |
whole configuration, etc.
|
1328 |
|
1329 |
@warning: this function will call L{_WriteConfig()}, but also
|
1330 |
L{DropECReservations} so it needs to be called only from a
|
1331 |
"safe" place (the constructor). If one wanted to call it with
|
1332 |
the lock held, a DropECReservationUnlocked would need to be
|
1333 |
created first, to avoid causing deadlock.
|
1334 |
|
1335 |
"""
|
1336 |
modified = False
|
1337 |
for item in self._AllUUIDObjects(): |
1338 |
if item.uuid is None: |
1339 |
item.uuid = self._GenerateUniqueID(_UPGRADE_CONFIG_JID)
|
1340 |
modified = True
|
1341 |
if not self._config_data.nodegroups: |
1342 |
default_nodegroup_uuid = self._GenerateUniqueID(_UPGRADE_CONFIG_JID)
|
1343 |
default_nodegroup = objects.NodeGroup( |
1344 |
uuid=default_nodegroup_uuid, |
1345 |
name="default",
|
1346 |
members=[], |
1347 |
) |
1348 |
self._config_data.nodegroups[default_nodegroup_uuid] = default_nodegroup
|
1349 |
modified = True
|
1350 |
for node in self._config_data.nodes.values(): |
1351 |
if not node.nodegroup: |
1352 |
node.nodegroup = self.LookupNodeGroup(None) |
1353 |
modified = True
|
1354 |
# This is technically *not* an upgrade, but needs to be done both when
|
1355 |
# nodegroups are being added, and upon normally loading the config,
|
1356 |
# because the members list of a node group is discarded upon
|
1357 |
# serializing/deserializing the object.
|
1358 |
self._UnlockedAddNodeToGroup(node.name, node.nodegroup)
|
1359 |
if modified:
|
1360 |
self._WriteConfig()
|
1361 |
# This is ok even if it acquires the internal lock, as _UpgradeConfig is
|
1362 |
# only called at config init time, without the lock held
|
1363 |
self.DropECReservations(_UPGRADE_CONFIG_JID)
|
1364 |
|
1365 |
def _DistributeConfig(self, feedback_fn): |
1366 |
"""Distribute the configuration to the other nodes.
|
1367 |
|
1368 |
Currently, this only copies the configuration file. In the future,
|
1369 |
it could be used to encapsulate the 2/3-phase update mechanism.
|
1370 |
|
1371 |
"""
|
1372 |
if self._offline: |
1373 |
return True |
1374 |
|
1375 |
bad = False
|
1376 |
|
1377 |
node_list = [] |
1378 |
addr_list = [] |
1379 |
myhostname = self._my_hostname
|
1380 |
# we can skip checking whether _UnlockedGetNodeInfo returns None
|
1381 |
# since the node list comes from _UnlocketGetNodeList, and we are
|
1382 |
# called with the lock held, so no modifications should take place
|
1383 |
# in between
|
1384 |
for node_name in self._UnlockedGetNodeList(): |
1385 |
if node_name == myhostname:
|
1386 |
continue
|
1387 |
node_info = self._UnlockedGetNodeInfo(node_name)
|
1388 |
if not node_info.master_candidate: |
1389 |
continue
|
1390 |
node_list.append(node_info.name) |
1391 |
addr_list.append(node_info.primary_ip) |
1392 |
|
1393 |
result = rpc.RpcRunner.call_upload_file(node_list, self._cfg_file,
|
1394 |
address_list=addr_list) |
1395 |
for to_node, to_result in result.items(): |
1396 |
msg = to_result.fail_msg |
1397 |
if msg:
|
1398 |
msg = ("Copy of file %s to node %s failed: %s" %
|
1399 |
(self._cfg_file, to_node, msg))
|
1400 |
logging.error(msg) |
1401 |
|
1402 |
if feedback_fn:
|
1403 |
feedback_fn(msg) |
1404 |
|
1405 |
bad = True
|
1406 |
|
1407 |
return not bad |
1408 |
|
1409 |
def _WriteConfig(self, destination=None, feedback_fn=None): |
1410 |
"""Write the configuration data to persistent storage.
|
1411 |
|
1412 |
"""
|
1413 |
assert feedback_fn is None or callable(feedback_fn) |
1414 |
|
1415 |
# Warn on config errors, but don't abort the save - the
|
1416 |
# configuration has already been modified, and we can't revert;
|
1417 |
# the best we can do is to warn the user and save as is, leaving
|
1418 |
# recovery to the user
|
1419 |
config_errors = self._UnlockedVerifyConfig()
|
1420 |
if config_errors:
|
1421 |
errmsg = ("Configuration data is not consistent: %s" %
|
1422 |
(utils.CommaJoin(config_errors))) |
1423 |
logging.critical(errmsg) |
1424 |
if feedback_fn:
|
1425 |
feedback_fn(errmsg) |
1426 |
|
1427 |
if destination is None: |
1428 |
destination = self._cfg_file
|
1429 |
self._BumpSerialNo()
|
1430 |
txt = serializer.Dump(self._config_data.ToDict())
|
1431 |
|
1432 |
getents = self._getents()
|
1433 |
utils.WriteFile(destination, data=txt, gid=getents.confd_gid, mode=0640)
|
1434 |
|
1435 |
self.write_count += 1 |
1436 |
|
1437 |
# and redistribute the config file to master candidates
|
1438 |
self._DistributeConfig(feedback_fn)
|
1439 |
|
1440 |
# Write ssconf files on all nodes (including locally)
|
1441 |
if self._last_cluster_serial < self._config_data.cluster.serial_no: |
1442 |
if not self._offline: |
1443 |
result = rpc.RpcRunner.call_write_ssconf_files( |
1444 |
self._UnlockedGetOnlineNodeList(),
|
1445 |
self._UnlockedGetSsconfValues())
|
1446 |
|
1447 |
for nname, nresu in result.items(): |
1448 |
msg = nresu.fail_msg |
1449 |
if msg:
|
1450 |
errmsg = ("Error while uploading ssconf files to"
|
1451 |
" node %s: %s" % (nname, msg))
|
1452 |
logging.warning(errmsg) |
1453 |
|
1454 |
if feedback_fn:
|
1455 |
feedback_fn(errmsg) |
1456 |
|
1457 |
self._last_cluster_serial = self._config_data.cluster.serial_no |
1458 |
|
1459 |
def _UnlockedGetSsconfValues(self): |
1460 |
"""Return the values needed by ssconf.
|
1461 |
|
1462 |
@rtype: dict
|
1463 |
@return: a dictionary with keys the ssconf names and values their
|
1464 |
associated value
|
1465 |
|
1466 |
"""
|
1467 |
fn = "\n".join
|
1468 |
instance_names = utils.NiceSort(self._UnlockedGetInstanceList())
|
1469 |
node_names = utils.NiceSort(self._UnlockedGetNodeList())
|
1470 |
node_info = [self._UnlockedGetNodeInfo(name) for name in node_names] |
1471 |
node_pri_ips = ["%s %s" % (ninfo.name, ninfo.primary_ip)
|
1472 |
for ninfo in node_info] |
1473 |
node_snd_ips = ["%s %s" % (ninfo.name, ninfo.secondary_ip)
|
1474 |
for ninfo in node_info] |
1475 |
|
1476 |
instance_data = fn(instance_names) |
1477 |
off_data = fn(node.name for node in node_info if node.offline) |
1478 |
on_data = fn(node.name for node in node_info if not node.offline) |
1479 |
mc_data = fn(node.name for node in node_info if node.master_candidate) |
1480 |
mc_ips_data = fn(node.primary_ip for node in node_info |
1481 |
if node.master_candidate)
|
1482 |
node_data = fn(node_names) |
1483 |
node_pri_ips_data = fn(node_pri_ips) |
1484 |
node_snd_ips_data = fn(node_snd_ips) |
1485 |
|
1486 |
cluster = self._config_data.cluster
|
1487 |
cluster_tags = fn(cluster.GetTags()) |
1488 |
|
1489 |
hypervisor_list = fn(cluster.enabled_hypervisors) |
1490 |
|
1491 |
uid_pool = uidpool.FormatUidPool(cluster.uid_pool, separator="\n")
|
1492 |
|
1493 |
nodegroups = ["%s %s" % (nodegroup.uuid, nodegroup.name) for nodegroup in |
1494 |
self._config_data.nodegroups.values()]
|
1495 |
nodegroups_data = fn(utils.NiceSort(nodegroups)) |
1496 |
|
1497 |
return {
|
1498 |
constants.SS_CLUSTER_NAME: cluster.cluster_name, |
1499 |
constants.SS_CLUSTER_TAGS: cluster_tags, |
1500 |
constants.SS_FILE_STORAGE_DIR: cluster.file_storage_dir, |
1501 |
constants.SS_MASTER_CANDIDATES: mc_data, |
1502 |
constants.SS_MASTER_CANDIDATES_IPS: mc_ips_data, |
1503 |
constants.SS_MASTER_IP: cluster.master_ip, |
1504 |
constants.SS_MASTER_NETDEV: cluster.master_netdev, |
1505 |
constants.SS_MASTER_NODE: cluster.master_node, |
1506 |
constants.SS_NODE_LIST: node_data, |
1507 |
constants.SS_NODE_PRIMARY_IPS: node_pri_ips_data, |
1508 |
constants.SS_NODE_SECONDARY_IPS: node_snd_ips_data, |
1509 |
constants.SS_OFFLINE_NODES: off_data, |
1510 |
constants.SS_ONLINE_NODES: on_data, |
1511 |
constants.SS_PRIMARY_IP_FAMILY: str(cluster.primary_ip_family),
|
1512 |
constants.SS_INSTANCE_LIST: instance_data, |
1513 |
constants.SS_RELEASE_VERSION: constants.RELEASE_VERSION, |
1514 |
constants.SS_HYPERVISOR_LIST: hypervisor_list, |
1515 |
constants.SS_MAINTAIN_NODE_HEALTH: str(cluster.maintain_node_health),
|
1516 |
constants.SS_UID_POOL: uid_pool, |
1517 |
constants.SS_NODEGROUPS: nodegroups_data, |
1518 |
} |
1519 |
|
1520 |
@locking.ssynchronized(_config_lock, shared=1) |
1521 |
def GetSsconfValues(self): |
1522 |
"""Wrapper using lock around _UnlockedGetSsconf().
|
1523 |
|
1524 |
"""
|
1525 |
return self._UnlockedGetSsconfValues() |
1526 |
|
1527 |
@locking.ssynchronized(_config_lock, shared=1) |
1528 |
def GetVGName(self): |
1529 |
"""Return the volume group name.
|
1530 |
|
1531 |
"""
|
1532 |
return self._config_data.cluster.volume_group_name |
1533 |
|
1534 |
@locking.ssynchronized(_config_lock)
|
1535 |
def SetVGName(self, vg_name): |
1536 |
"""Set the volume group name.
|
1537 |
|
1538 |
"""
|
1539 |
self._config_data.cluster.volume_group_name = vg_name
|
1540 |
self._config_data.cluster.serial_no += 1 |
1541 |
self._WriteConfig()
|
1542 |
|
1543 |
@locking.ssynchronized(_config_lock, shared=1) |
1544 |
def GetDRBDHelper(self): |
1545 |
"""Return DRBD usermode helper.
|
1546 |
|
1547 |
"""
|
1548 |
return self._config_data.cluster.drbd_usermode_helper |
1549 |
|
1550 |
@locking.ssynchronized(_config_lock)
|
1551 |
def SetDRBDHelper(self, drbd_helper): |
1552 |
"""Set DRBD usermode helper.
|
1553 |
|
1554 |
"""
|
1555 |
self._config_data.cluster.drbd_usermode_helper = drbd_helper
|
1556 |
self._config_data.cluster.serial_no += 1 |
1557 |
self._WriteConfig()
|
1558 |
|
1559 |
@locking.ssynchronized(_config_lock, shared=1) |
1560 |
def GetMACPrefix(self): |
1561 |
"""Return the mac prefix.
|
1562 |
|
1563 |
"""
|
1564 |
return self._config_data.cluster.mac_prefix |
1565 |
|
1566 |
@locking.ssynchronized(_config_lock, shared=1) |
1567 |
def GetClusterInfo(self): |
1568 |
"""Returns information about the cluster
|
1569 |
|
1570 |
@rtype: L{objects.Cluster}
|
1571 |
@return: the cluster object
|
1572 |
|
1573 |
"""
|
1574 |
return self._config_data.cluster |
1575 |
|
1576 |
@locking.ssynchronized(_config_lock, shared=1) |
1577 |
def HasAnyDiskOfType(self, dev_type): |
1578 |
"""Check if in there is at disk of the given type in the configuration.
|
1579 |
|
1580 |
"""
|
1581 |
return self._config_data.HasAnyDiskOfType(dev_type) |
1582 |
|
1583 |
@locking.ssynchronized(_config_lock)
|
1584 |
def Update(self, target, feedback_fn): |
1585 |
"""Notify function to be called after updates.
|
1586 |
|
1587 |
This function must be called when an object (as returned by
|
1588 |
GetInstanceInfo, GetNodeInfo, GetCluster) has been updated and the
|
1589 |
caller wants the modifications saved to the backing store. Note
|
1590 |
that all modified objects will be saved, but the target argument
|
1591 |
is the one the caller wants to ensure that it's saved.
|
1592 |
|
1593 |
@param target: an instance of either L{objects.Cluster},
|
1594 |
L{objects.Node} or L{objects.Instance} which is existing in
|
1595 |
the cluster
|
1596 |
@param feedback_fn: Callable feedback function
|
1597 |
|
1598 |
"""
|
1599 |
if self._config_data is None: |
1600 |
raise errors.ProgrammerError("Configuration file not read," |
1601 |
" cannot save.")
|
1602 |
update_serial = False
|
1603 |
if isinstance(target, objects.Cluster): |
1604 |
test = target == self._config_data.cluster
|
1605 |
elif isinstance(target, objects.Node): |
1606 |
test = target in self._config_data.nodes.values() |
1607 |
update_serial = True
|
1608 |
elif isinstance(target, objects.Instance): |
1609 |
test = target in self._config_data.instances.values() |
1610 |
else:
|
1611 |
raise errors.ProgrammerError("Invalid object type (%s) passed to" |
1612 |
" ConfigWriter.Update" % type(target)) |
1613 |
if not test: |
1614 |
raise errors.ConfigurationError("Configuration updated since object" |
1615 |
" has been read or unknown object")
|
1616 |
target.serial_no += 1
|
1617 |
target.mtime = now = time.time() |
1618 |
|
1619 |
if update_serial:
|
1620 |
# for node updates, we need to increase the cluster serial too
|
1621 |
self._config_data.cluster.serial_no += 1 |
1622 |
self._config_data.cluster.mtime = now
|
1623 |
|
1624 |
if isinstance(target, objects.Instance): |
1625 |
self._UnlockedReleaseDRBDMinors(target.name)
|
1626 |
|
1627 |
self._WriteConfig(feedback_fn=feedback_fn)
|
1628 |
|
1629 |
@locking.ssynchronized(_config_lock)
|
1630 |
def DropECReservations(self, ec_id): |
1631 |
"""Drop per-execution-context reservations
|
1632 |
|
1633 |
"""
|
1634 |
for rm in self._all_rms: |
1635 |
rm.DropECReservations(ec_id) |