root / lib / objects.py @ 09444532
History | View | Annotate | Download (27.3 kB)
1 |
#
|
---|---|
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 |
"""Transportable objects for Ganeti.
|
23 |
|
24 |
This module provides small, mostly data-only objects which are safe to
|
25 |
pass to and from external parties.
|
26 |
|
27 |
"""
|
28 |
|
29 |
|
30 |
import ConfigParser |
31 |
import re |
32 |
import copy |
33 |
from cStringIO import StringIO |
34 |
|
35 |
from ganeti import errors |
36 |
from ganeti import constants |
37 |
|
38 |
|
39 |
__all__ = ["ConfigObject", "ConfigData", "NIC", "Disk", "Instance", |
40 |
"OS", "Node", "Cluster", "FillDict"] |
41 |
|
42 |
|
43 |
def FillDict(defaults_dict, custom_dict): |
44 |
"""Basic function to apply settings on top a default dict.
|
45 |
|
46 |
@type defaults_dict: dict
|
47 |
@param defaults_dict: dictionary holding the default values
|
48 |
@type custom_dict: dict
|
49 |
@param custom_dict: dictionary holding customized value
|
50 |
@rtype: dict
|
51 |
@return: dict with the 'full' values
|
52 |
|
53 |
"""
|
54 |
ret_dict = copy.deepcopy(defaults_dict) |
55 |
ret_dict.update(custom_dict) |
56 |
return ret_dict
|
57 |
|
58 |
|
59 |
def UpgradeGroupedParams(target, defaults): |
60 |
"""Update all groups for the target parameter.
|
61 |
|
62 |
@type target: dict of dicts
|
63 |
@param target: {group: {parameter: value}}
|
64 |
@type defaults: dict
|
65 |
@param defaults: default parameter values
|
66 |
|
67 |
"""
|
68 |
if target is None: |
69 |
target = {constants.PP_DEFAULT: defaults} |
70 |
else:
|
71 |
for group in target: |
72 |
target[group] = FillDict(defaults, target[group]) |
73 |
return target
|
74 |
|
75 |
|
76 |
class ConfigObject(object): |
77 |
"""A generic config object.
|
78 |
|
79 |
It has the following properties:
|
80 |
|
81 |
- provides somewhat safe recursive unpickling and pickling for its classes
|
82 |
- unset attributes which are defined in slots are always returned
|
83 |
as None instead of raising an error
|
84 |
|
85 |
Classes derived from this must always declare __slots__ (we use many
|
86 |
config objects and the memory reduction is useful)
|
87 |
|
88 |
"""
|
89 |
__slots__ = [] |
90 |
|
91 |
def __init__(self, **kwargs): |
92 |
for k, v in kwargs.iteritems(): |
93 |
setattr(self, k, v) |
94 |
self.UpgradeConfig()
|
95 |
|
96 |
def __getattr__(self, name): |
97 |
if name not in self.__slots__: |
98 |
raise AttributeError("Invalid object attribute %s.%s" % |
99 |
(type(self).__name__, name)) |
100 |
return None |
101 |
|
102 |
def __setitem__(self, key, value): |
103 |
if key not in self.__slots__: |
104 |
raise KeyError(key) |
105 |
setattr(self, key, value) |
106 |
|
107 |
def __setstate__(self, state): |
108 |
for name in state: |
109 |
if name in self.__slots__: |
110 |
setattr(self, name, state[name]) |
111 |
|
112 |
def ToDict(self): |
113 |
"""Convert to a dict holding only standard python types.
|
114 |
|
115 |
The generic routine just dumps all of this object's attributes in
|
116 |
a dict. It does not work if the class has children who are
|
117 |
ConfigObjects themselves (e.g. the nics list in an Instance), in
|
118 |
which case the object should subclass the function in order to
|
119 |
make sure all objects returned are only standard python types.
|
120 |
|
121 |
"""
|
122 |
result = {} |
123 |
for name in self.__slots__: |
124 |
value = getattr(self, name, None) |
125 |
if value is not None: |
126 |
result[name] = value |
127 |
return result
|
128 |
|
129 |
__getstate__ = ToDict |
130 |
|
131 |
@classmethod
|
132 |
def FromDict(cls, val): |
133 |
"""Create an object from a dictionary.
|
134 |
|
135 |
This generic routine takes a dict, instantiates a new instance of
|
136 |
the given class, and sets attributes based on the dict content.
|
137 |
|
138 |
As for `ToDict`, this does not work if the class has children
|
139 |
who are ConfigObjects themselves (e.g. the nics list in an
|
140 |
Instance), in which case the object should subclass the function
|
141 |
and alter the objects.
|
142 |
|
143 |
"""
|
144 |
if not isinstance(val, dict): |
145 |
raise errors.ConfigurationError("Invalid object passed to FromDict:" |
146 |
" expected dict, got %s" % type(val)) |
147 |
val_str = dict([(str(k), v) for k, v in val.iteritems()]) |
148 |
obj = cls(**val_str) |
149 |
return obj
|
150 |
|
151 |
@staticmethod
|
152 |
def _ContainerToDicts(container): |
153 |
"""Convert the elements of a container to standard python types.
|
154 |
|
155 |
This method converts a container with elements derived from
|
156 |
ConfigData to standard python types. If the container is a dict,
|
157 |
we don't touch the keys, only the values.
|
158 |
|
159 |
"""
|
160 |
if isinstance(container, dict): |
161 |
ret = dict([(k, v.ToDict()) for k, v in container.iteritems()]) |
162 |
elif isinstance(container, (list, tuple, set, frozenset)): |
163 |
ret = [elem.ToDict() for elem in container] |
164 |
else:
|
165 |
raise TypeError("Invalid type %s passed to _ContainerToDicts" % |
166 |
type(container))
|
167 |
return ret
|
168 |
|
169 |
@staticmethod
|
170 |
def _ContainerFromDicts(source, c_type, e_type): |
171 |
"""Convert a container from standard python types.
|
172 |
|
173 |
This method converts a container with standard python types to
|
174 |
ConfigData objects. If the container is a dict, we don't touch the
|
175 |
keys, only the values.
|
176 |
|
177 |
"""
|
178 |
if not isinstance(c_type, type): |
179 |
raise TypeError("Container type %s passed to _ContainerFromDicts is" |
180 |
" not a type" % type(c_type)) |
181 |
if c_type is dict: |
182 |
ret = dict([(k, e_type.FromDict(v)) for k, v in source.iteritems()]) |
183 |
elif c_type in (list, tuple, set, frozenset): |
184 |
ret = c_type([e_type.FromDict(elem) for elem in source]) |
185 |
else:
|
186 |
raise TypeError("Invalid container type %s passed to" |
187 |
" _ContainerFromDicts" % c_type)
|
188 |
return ret
|
189 |
|
190 |
def __repr__(self): |
191 |
"""Implement __repr__ for ConfigObjects."""
|
192 |
return repr(self.ToDict()) |
193 |
|
194 |
def UpgradeConfig(self): |
195 |
"""Fill defaults for missing configuration values.
|
196 |
|
197 |
This method will be called at object init time, and its implementation will
|
198 |
be object dependent.
|
199 |
|
200 |
"""
|
201 |
pass
|
202 |
|
203 |
|
204 |
class TaggableObject(ConfigObject): |
205 |
"""An generic class supporting tags.
|
206 |
|
207 |
"""
|
208 |
__slots__ = ConfigObject.__slots__ + ["tags"]
|
209 |
|
210 |
@staticmethod
|
211 |
def ValidateTag(tag): |
212 |
"""Check if a tag is valid.
|
213 |
|
214 |
If the tag is invalid, an errors.TagError will be raised. The
|
215 |
function has no return value.
|
216 |
|
217 |
"""
|
218 |
if not isinstance(tag, basestring): |
219 |
raise errors.TagError("Invalid tag type (not a string)") |
220 |
if len(tag) > constants.MAX_TAG_LEN: |
221 |
raise errors.TagError("Tag too long (>%d characters)" % |
222 |
constants.MAX_TAG_LEN) |
223 |
if not tag: |
224 |
raise errors.TagError("Tags cannot be empty") |
225 |
if not re.match("^[\w.+*/:-]+$", tag): |
226 |
raise errors.TagError("Tag contains invalid characters") |
227 |
|
228 |
def GetTags(self): |
229 |
"""Return the tags list.
|
230 |
|
231 |
"""
|
232 |
tags = getattr(self, "tags", None) |
233 |
if tags is None: |
234 |
tags = self.tags = set() |
235 |
return tags
|
236 |
|
237 |
def AddTag(self, tag): |
238 |
"""Add a new tag.
|
239 |
|
240 |
"""
|
241 |
self.ValidateTag(tag)
|
242 |
tags = self.GetTags()
|
243 |
if len(tags) >= constants.MAX_TAGS_PER_OBJ: |
244 |
raise errors.TagError("Too many tags") |
245 |
self.GetTags().add(tag)
|
246 |
|
247 |
def RemoveTag(self, tag): |
248 |
"""Remove a tag.
|
249 |
|
250 |
"""
|
251 |
self.ValidateTag(tag)
|
252 |
tags = self.GetTags()
|
253 |
try:
|
254 |
tags.remove(tag) |
255 |
except KeyError: |
256 |
raise errors.TagError("Tag not found") |
257 |
|
258 |
def ToDict(self): |
259 |
"""Taggable-object-specific conversion to standard python types.
|
260 |
|
261 |
This replaces the tags set with a list.
|
262 |
|
263 |
"""
|
264 |
bo = super(TaggableObject, self).ToDict() |
265 |
|
266 |
tags = bo.get("tags", None) |
267 |
if isinstance(tags, set): |
268 |
bo["tags"] = list(tags) |
269 |
return bo
|
270 |
|
271 |
@classmethod
|
272 |
def FromDict(cls, val): |
273 |
"""Custom function for instances.
|
274 |
|
275 |
"""
|
276 |
obj = super(TaggableObject, cls).FromDict(val)
|
277 |
if hasattr(obj, "tags") and isinstance(obj.tags, list): |
278 |
obj.tags = set(obj.tags)
|
279 |
return obj
|
280 |
|
281 |
|
282 |
class ConfigData(ConfigObject): |
283 |
"""Top-level config object."""
|
284 |
__slots__ = ["version", "cluster", "nodes", "instances", "serial_no"] |
285 |
|
286 |
def ToDict(self): |
287 |
"""Custom function for top-level config data.
|
288 |
|
289 |
This just replaces the list of instances, nodes and the cluster
|
290 |
with standard python types.
|
291 |
|
292 |
"""
|
293 |
mydict = super(ConfigData, self).ToDict() |
294 |
mydict["cluster"] = mydict["cluster"].ToDict() |
295 |
for key in "nodes", "instances": |
296 |
mydict[key] = self._ContainerToDicts(mydict[key])
|
297 |
|
298 |
return mydict
|
299 |
|
300 |
@classmethod
|
301 |
def FromDict(cls, val): |
302 |
"""Custom function for top-level config data
|
303 |
|
304 |
"""
|
305 |
obj = super(ConfigData, cls).FromDict(val)
|
306 |
obj.cluster = Cluster.FromDict(obj.cluster) |
307 |
obj.nodes = cls._ContainerFromDicts(obj.nodes, dict, Node)
|
308 |
obj.instances = cls._ContainerFromDicts(obj.instances, dict, Instance)
|
309 |
return obj
|
310 |
|
311 |
|
312 |
class NIC(ConfigObject): |
313 |
"""Config object representing a network card."""
|
314 |
__slots__ = ["mac", "ip", "bridge", "nicparams"] |
315 |
|
316 |
@classmethod
|
317 |
def CheckParameterSyntax(cls, nicparams): |
318 |
"""Check the given parameters for validity.
|
319 |
|
320 |
@type nicparams: dict
|
321 |
@param nicparams: dictionary with parameter names/value
|
322 |
@raise errors.ConfigurationError: when a parameter is not valid
|
323 |
|
324 |
"""
|
325 |
if nicparams[constants.NIC_MODE] not in constants.NIC_VALID_MODES: |
326 |
err = "Invalid nic mode: %s" % nicparams[constants.NIC_MODE]
|
327 |
raise errors.ConfigurationError(err)
|
328 |
|
329 |
if (nicparams[constants.NIC_MODE] is constants.NIC_MODE_BRIDGED and |
330 |
not nicparams[constants.NIC_LINK]):
|
331 |
err = "Missing bridged nic link"
|
332 |
raise errors.ConfigurationError(err)
|
333 |
|
334 |
def UpgradeConfig(self): |
335 |
"""Fill defaults for missing configuration values.
|
336 |
|
337 |
"""
|
338 |
if self.nicparams is None: |
339 |
self.nicparams = {}
|
340 |
if self.bridge is not None: |
341 |
self.nicparams[constants.NIC_MODE] = constants.NIC_MODE_BRIDGED
|
342 |
self.nicparams[constants.NIC_LINK] = self.bridge |
343 |
# bridge is no longer used it 2.1. The slot is left there to support
|
344 |
# upgrading, but will be removed in 2.2
|
345 |
if self.bridge is not None: |
346 |
self.bridge = None |
347 |
|
348 |
|
349 |
class Disk(ConfigObject): |
350 |
"""Config object representing a block device."""
|
351 |
__slots__ = ["dev_type", "logical_id", "physical_id", |
352 |
"children", "iv_name", "size", "mode"] |
353 |
|
354 |
def CreateOnSecondary(self): |
355 |
"""Test if this device needs to be created on a secondary node."""
|
356 |
return self.dev_type in (constants.LD_DRBD8, constants.LD_LV) |
357 |
|
358 |
def AssembleOnSecondary(self): |
359 |
"""Test if this device needs to be assembled on a secondary node."""
|
360 |
return self.dev_type in (constants.LD_DRBD8, constants.LD_LV) |
361 |
|
362 |
def OpenOnSecondary(self): |
363 |
"""Test if this device needs to be opened on a secondary node."""
|
364 |
return self.dev_type in (constants.LD_LV,) |
365 |
|
366 |
def StaticDevPath(self): |
367 |
"""Return the device path if this device type has a static one.
|
368 |
|
369 |
Some devices (LVM for example) live always at the same /dev/ path,
|
370 |
irrespective of their status. For such devices, we return this
|
371 |
path, for others we return None.
|
372 |
|
373 |
"""
|
374 |
if self.dev_type == constants.LD_LV: |
375 |
return "/dev/%s/%s" % (self.logical_id[0], self.logical_id[1]) |
376 |
return None |
377 |
|
378 |
def ChildrenNeeded(self): |
379 |
"""Compute the needed number of children for activation.
|
380 |
|
381 |
This method will return either -1 (all children) or a positive
|
382 |
number denoting the minimum number of children needed for
|
383 |
activation (only mirrored devices will usually return >=0).
|
384 |
|
385 |
Currently, only DRBD8 supports diskless activation (therefore we
|
386 |
return 0), for all other we keep the previous semantics and return
|
387 |
-1.
|
388 |
|
389 |
"""
|
390 |
if self.dev_type == constants.LD_DRBD8: |
391 |
return 0 |
392 |
return -1 |
393 |
|
394 |
def GetNodes(self, node): |
395 |
"""This function returns the nodes this device lives on.
|
396 |
|
397 |
Given the node on which the parent of the device lives on (or, in
|
398 |
case of a top-level device, the primary node of the devices'
|
399 |
instance), this function will return a list of nodes on which this
|
400 |
devices needs to (or can) be assembled.
|
401 |
|
402 |
"""
|
403 |
if self.dev_type in [constants.LD_LV, constants.LD_FILE]: |
404 |
result = [node] |
405 |
elif self.dev_type in constants.LDS_DRBD: |
406 |
result = [self.logical_id[0], self.logical_id[1]] |
407 |
if node not in result: |
408 |
raise errors.ConfigurationError("DRBD device passed unknown node") |
409 |
else:
|
410 |
raise errors.ProgrammerError("Unhandled device type %s" % self.dev_type) |
411 |
return result
|
412 |
|
413 |
def ComputeNodeTree(self, parent_node): |
414 |
"""Compute the node/disk tree for this disk and its children.
|
415 |
|
416 |
This method, given the node on which the parent disk lives, will
|
417 |
return the list of all (node, disk) pairs which describe the disk
|
418 |
tree in the most compact way. For example, a drbd/lvm stack
|
419 |
will be returned as (primary_node, drbd) and (secondary_node, drbd)
|
420 |
which represents all the top-level devices on the nodes.
|
421 |
|
422 |
"""
|
423 |
my_nodes = self.GetNodes(parent_node)
|
424 |
result = [(node, self) for node in my_nodes] |
425 |
if not self.children: |
426 |
# leaf device
|
427 |
return result
|
428 |
for node in my_nodes: |
429 |
for child in self.children: |
430 |
child_result = child.ComputeNodeTree(node) |
431 |
if len(child_result) == 1: |
432 |
# child (and all its descendants) is simple, doesn't split
|
433 |
# over multiple hosts, so we don't need to describe it, our
|
434 |
# own entry for this node describes it completely
|
435 |
continue
|
436 |
else:
|
437 |
# check if child nodes differ from my nodes; note that
|
438 |
# subdisk can differ from the child itself, and be instead
|
439 |
# one of its descendants
|
440 |
for subnode, subdisk in child_result: |
441 |
if subnode not in my_nodes: |
442 |
result.append((subnode, subdisk)) |
443 |
# otherwise child is under our own node, so we ignore this
|
444 |
# entry (but probably the other results in the list will
|
445 |
# be different)
|
446 |
return result
|
447 |
|
448 |
def RecordGrow(self, amount): |
449 |
"""Update the size of this disk after growth.
|
450 |
|
451 |
This method recurses over the disks's children and updates their
|
452 |
size correspondigly. The method needs to be kept in sync with the
|
453 |
actual algorithms from bdev.
|
454 |
|
455 |
"""
|
456 |
if self.dev_type == constants.LD_LV: |
457 |
self.size += amount
|
458 |
elif self.dev_type == constants.LD_DRBD8: |
459 |
if self.children: |
460 |
self.children[0].RecordGrow(amount) |
461 |
self.size += amount
|
462 |
else:
|
463 |
raise errors.ProgrammerError("Disk.RecordGrow called for unsupported" |
464 |
" disk type %s" % self.dev_type) |
465 |
|
466 |
def SetPhysicalID(self, target_node, nodes_ip): |
467 |
"""Convert the logical ID to the physical ID.
|
468 |
|
469 |
This is used only for drbd, which needs ip/port configuration.
|
470 |
|
471 |
The routine descends down and updates its children also, because
|
472 |
this helps when the only the top device is passed to the remote
|
473 |
node.
|
474 |
|
475 |
Arguments:
|
476 |
- target_node: the node we wish to configure for
|
477 |
- nodes_ip: a mapping of node name to ip
|
478 |
|
479 |
The target_node must exist in in nodes_ip, and must be one of the
|
480 |
nodes in the logical ID for each of the DRBD devices encountered
|
481 |
in the disk tree.
|
482 |
|
483 |
"""
|
484 |
if self.children: |
485 |
for child in self.children: |
486 |
child.SetPhysicalID(target_node, nodes_ip) |
487 |
|
488 |
if self.logical_id is None and self.physical_id is not None: |
489 |
return
|
490 |
if self.dev_type in constants.LDS_DRBD: |
491 |
pnode, snode, port, pminor, sminor, secret = self.logical_id
|
492 |
if target_node not in (pnode, snode): |
493 |
raise errors.ConfigurationError("DRBD device not knowing node %s" % |
494 |
target_node) |
495 |
pnode_ip = nodes_ip.get(pnode, None)
|
496 |
snode_ip = nodes_ip.get(snode, None)
|
497 |
if pnode_ip is None or snode_ip is None: |
498 |
raise errors.ConfigurationError("Can't find primary or secondary node" |
499 |
" for %s" % str(self)) |
500 |
p_data = (pnode_ip, port) |
501 |
s_data = (snode_ip, port) |
502 |
if pnode == target_node:
|
503 |
self.physical_id = p_data + s_data + (pminor, secret)
|
504 |
else: # it must be secondary, we tested above |
505 |
self.physical_id = s_data + p_data + (sminor, secret)
|
506 |
else:
|
507 |
self.physical_id = self.logical_id |
508 |
return
|
509 |
|
510 |
def ToDict(self): |
511 |
"""Disk-specific conversion to standard python types.
|
512 |
|
513 |
This replaces the children lists of objects with lists of
|
514 |
standard python types.
|
515 |
|
516 |
"""
|
517 |
bo = super(Disk, self).ToDict() |
518 |
|
519 |
for attr in ("children",): |
520 |
alist = bo.get(attr, None)
|
521 |
if alist:
|
522 |
bo[attr] = self._ContainerToDicts(alist)
|
523 |
return bo
|
524 |
|
525 |
@classmethod
|
526 |
def FromDict(cls, val): |
527 |
"""Custom function for Disks
|
528 |
|
529 |
"""
|
530 |
obj = super(Disk, cls).FromDict(val)
|
531 |
if obj.children:
|
532 |
obj.children = cls._ContainerFromDicts(obj.children, list, Disk)
|
533 |
if obj.logical_id and isinstance(obj.logical_id, list): |
534 |
obj.logical_id = tuple(obj.logical_id)
|
535 |
if obj.physical_id and isinstance(obj.physical_id, list): |
536 |
obj.physical_id = tuple(obj.physical_id)
|
537 |
if obj.dev_type in constants.LDS_DRBD: |
538 |
# we need a tuple of length six here
|
539 |
if len(obj.logical_id) < 6: |
540 |
obj.logical_id += (None,) * (6 - len(obj.logical_id)) |
541 |
return obj
|
542 |
|
543 |
def __str__(self): |
544 |
"""Custom str() formatter for disks.
|
545 |
|
546 |
"""
|
547 |
if self.dev_type == constants.LD_LV: |
548 |
val = "<LogicalVolume(/dev/%s/%s" % self.logical_id |
549 |
elif self.dev_type in constants.LDS_DRBD: |
550 |
node_a, node_b, port, minor_a, minor_b = self.logical_id[:5] |
551 |
val = "<DRBD8("
|
552 |
if self.physical_id is None: |
553 |
phy = "unconfigured"
|
554 |
else:
|
555 |
phy = ("configured as %s:%s %s:%s" %
|
556 |
(self.physical_id[0], self.physical_id[1], |
557 |
self.physical_id[2], self.physical_id[3])) |
558 |
|
559 |
val += ("hosts=%s/%d-%s/%d, port=%s, %s, " %
|
560 |
(node_a, minor_a, node_b, minor_b, port, phy)) |
561 |
if self.children and self.children.count(None) == 0: |
562 |
val += "backend=%s, metadev=%s" % (self.children[0], self.children[1]) |
563 |
else:
|
564 |
val += "no local storage"
|
565 |
else:
|
566 |
val = ("<Disk(type=%s, logical_id=%s, physical_id=%s, children=%s" %
|
567 |
(self.dev_type, self.logical_id, self.physical_id, self.children)) |
568 |
if self.iv_name is None: |
569 |
val += ", not visible"
|
570 |
else:
|
571 |
val += ", visible as /dev/%s" % self.iv_name |
572 |
if isinstance(self.size, int): |
573 |
val += ", size=%dm)>" % self.size |
574 |
else:
|
575 |
val += ", size='%s')>" % (self.size,) |
576 |
return val
|
577 |
|
578 |
def Verify(self): |
579 |
"""Checks that this disk is correctly configured.
|
580 |
|
581 |
"""
|
582 |
all_errors = [] |
583 |
if self.mode not in constants.DISK_ACCESS_SET: |
584 |
all_errors.append("Disk access mode '%s' is invalid" % (self.mode, )) |
585 |
return all_errors
|
586 |
|
587 |
|
588 |
class Instance(TaggableObject): |
589 |
"""Config object representing an instance."""
|
590 |
__slots__ = TaggableObject.__slots__ + [ |
591 |
"name",
|
592 |
"primary_node",
|
593 |
"os",
|
594 |
"hypervisor",
|
595 |
"hvparams",
|
596 |
"beparams",
|
597 |
"admin_up",
|
598 |
"nics",
|
599 |
"disks",
|
600 |
"disk_template",
|
601 |
"network_port",
|
602 |
"serial_no",
|
603 |
] |
604 |
|
605 |
def _ComputeSecondaryNodes(self): |
606 |
"""Compute the list of secondary nodes.
|
607 |
|
608 |
This is a simple wrapper over _ComputeAllNodes.
|
609 |
|
610 |
"""
|
611 |
all_nodes = set(self._ComputeAllNodes()) |
612 |
all_nodes.discard(self.primary_node)
|
613 |
return tuple(all_nodes) |
614 |
|
615 |
secondary_nodes = property(_ComputeSecondaryNodes, None, None, |
616 |
"List of secondary nodes")
|
617 |
|
618 |
def _ComputeAllNodes(self): |
619 |
"""Compute the list of all nodes.
|
620 |
|
621 |
Since the data is already there (in the drbd disks), keeping it as
|
622 |
a separate normal attribute is redundant and if not properly
|
623 |
synchronised can cause problems. Thus it's better to compute it
|
624 |
dynamically.
|
625 |
|
626 |
"""
|
627 |
def _Helper(nodes, device): |
628 |
"""Recursively computes nodes given a top device."""
|
629 |
if device.dev_type in constants.LDS_DRBD: |
630 |
nodea, nodeb = device.logical_id[:2]
|
631 |
nodes.add(nodea) |
632 |
nodes.add(nodeb) |
633 |
if device.children:
|
634 |
for child in device.children: |
635 |
_Helper(nodes, child) |
636 |
|
637 |
all_nodes = set()
|
638 |
all_nodes.add(self.primary_node)
|
639 |
for device in self.disks: |
640 |
_Helper(all_nodes, device) |
641 |
return tuple(all_nodes) |
642 |
|
643 |
all_nodes = property(_ComputeAllNodes, None, None, |
644 |
"List of all nodes of the instance")
|
645 |
|
646 |
def MapLVsByNode(self, lvmap=None, devs=None, node=None): |
647 |
"""Provide a mapping of nodes to LVs this instance owns.
|
648 |
|
649 |
This function figures out what logical volumes should belong on
|
650 |
which nodes, recursing through a device tree.
|
651 |
|
652 |
@param lvmap: optional dictionary to receive the
|
653 |
'node' : ['lv', ...] data.
|
654 |
|
655 |
@return: None if lvmap arg is given, otherwise, a dictionary
|
656 |
of the form { 'nodename' : ['volume1', 'volume2', ...], ... }
|
657 |
|
658 |
"""
|
659 |
if node == None: |
660 |
node = self.primary_node
|
661 |
|
662 |
if lvmap is None: |
663 |
lvmap = { node : [] } |
664 |
ret = lvmap |
665 |
else:
|
666 |
if not node in lvmap: |
667 |
lvmap[node] = [] |
668 |
ret = None
|
669 |
|
670 |
if not devs: |
671 |
devs = self.disks
|
672 |
|
673 |
for dev in devs: |
674 |
if dev.dev_type == constants.LD_LV:
|
675 |
lvmap[node].append(dev.logical_id[1])
|
676 |
|
677 |
elif dev.dev_type in constants.LDS_DRBD: |
678 |
if dev.children:
|
679 |
self.MapLVsByNode(lvmap, dev.children, dev.logical_id[0]) |
680 |
self.MapLVsByNode(lvmap, dev.children, dev.logical_id[1]) |
681 |
|
682 |
elif dev.children:
|
683 |
self.MapLVsByNode(lvmap, dev.children, node)
|
684 |
|
685 |
return ret
|
686 |
|
687 |
def FindDisk(self, idx): |
688 |
"""Find a disk given having a specified index.
|
689 |
|
690 |
This is just a wrapper that does validation of the index.
|
691 |
|
692 |
@type idx: int
|
693 |
@param idx: the disk index
|
694 |
@rtype: L{Disk}
|
695 |
@return: the corresponding disk
|
696 |
@raise errors.OpPrereqError: when the given index is not valid
|
697 |
|
698 |
"""
|
699 |
try:
|
700 |
idx = int(idx)
|
701 |
return self.disks[idx] |
702 |
except ValueError, err: |
703 |
raise errors.OpPrereqError("Invalid disk index: '%s'" % str(err)) |
704 |
except IndexError: |
705 |
raise errors.OpPrereqError("Invalid disk index: %d (instace has disks" |
706 |
" 0 to %d" % (idx, len(self.disks))) |
707 |
|
708 |
def ToDict(self): |
709 |
"""Instance-specific conversion to standard python types.
|
710 |
|
711 |
This replaces the children lists of objects with lists of standard
|
712 |
python types.
|
713 |
|
714 |
"""
|
715 |
bo = super(Instance, self).ToDict() |
716 |
|
717 |
for attr in "nics", "disks": |
718 |
alist = bo.get(attr, None)
|
719 |
if alist:
|
720 |
nlist = self._ContainerToDicts(alist)
|
721 |
else:
|
722 |
nlist = [] |
723 |
bo[attr] = nlist |
724 |
return bo
|
725 |
|
726 |
@classmethod
|
727 |
def FromDict(cls, val): |
728 |
"""Custom function for instances.
|
729 |
|
730 |
"""
|
731 |
obj = super(Instance, cls).FromDict(val)
|
732 |
obj.nics = cls._ContainerFromDicts(obj.nics, list, NIC)
|
733 |
obj.disks = cls._ContainerFromDicts(obj.disks, list, Disk)
|
734 |
return obj
|
735 |
|
736 |
|
737 |
class OS(ConfigObject): |
738 |
"""Config object representing an operating system."""
|
739 |
__slots__ = [ |
740 |
"name",
|
741 |
"path",
|
742 |
"api_versions",
|
743 |
"create_script",
|
744 |
"export_script",
|
745 |
"import_script",
|
746 |
"rename_script",
|
747 |
] |
748 |
|
749 |
|
750 |
class Node(TaggableObject): |
751 |
"""Config object representing a node."""
|
752 |
__slots__ = TaggableObject.__slots__ + [ |
753 |
"name",
|
754 |
"primary_ip",
|
755 |
"secondary_ip",
|
756 |
"serial_no",
|
757 |
"master_candidate",
|
758 |
"offline",
|
759 |
"drained",
|
760 |
] |
761 |
|
762 |
|
763 |
class Cluster(TaggableObject): |
764 |
"""Config object representing the cluster."""
|
765 |
__slots__ = TaggableObject.__slots__ + [ |
766 |
"serial_no",
|
767 |
"rsahostkeypub",
|
768 |
"highest_used_port",
|
769 |
"tcpudp_port_pool",
|
770 |
"mac_prefix",
|
771 |
"volume_group_name",
|
772 |
"default_bridge",
|
773 |
"default_hypervisor",
|
774 |
"master_node",
|
775 |
"master_ip",
|
776 |
"master_netdev",
|
777 |
"cluster_name",
|
778 |
"file_storage_dir",
|
779 |
"enabled_hypervisors",
|
780 |
"hvparams",
|
781 |
"beparams",
|
782 |
"nicparams",
|
783 |
"candidate_pool_size",
|
784 |
"modify_etc_hosts",
|
785 |
] |
786 |
|
787 |
def UpgradeConfig(self): |
788 |
"""Fill defaults for missing configuration values.
|
789 |
|
790 |
"""
|
791 |
if self.hvparams is None: |
792 |
self.hvparams = constants.HVC_DEFAULTS
|
793 |
else:
|
794 |
for hypervisor in self.hvparams: |
795 |
self.hvparams[hypervisor] = FillDict(
|
796 |
constants.HVC_DEFAULTS[hypervisor], self.hvparams[hypervisor])
|
797 |
|
798 |
self.beparams = UpgradeGroupedParams(self.beparams, |
799 |
constants.BEC_DEFAULTS) |
800 |
migrate_default_bridge = not self.nicparams |
801 |
self.nicparams = UpgradeGroupedParams(self.nicparams, |
802 |
constants.NICC_DEFAULTS) |
803 |
if migrate_default_bridge:
|
804 |
self.nicparams[constants.PP_DEFAULT][constants.NIC_LINK] = \
|
805 |
self.default_bridge
|
806 |
|
807 |
if self.modify_etc_hosts is None: |
808 |
self.modify_etc_hosts = True |
809 |
|
810 |
# default_bridge is no longer used it 2.1. The slot is left there to
|
811 |
# support auto-upgrading, but will be removed in 2.2
|
812 |
if self.default_bridge is not None: |
813 |
self.default_bridge = None |
814 |
|
815 |
# default_hypervisor is just the first enabled one in 2.1
|
816 |
if self.default_hypervisor is not None: |
817 |
self.enabled_hypervisors = [self.default_hypervisor] + \ |
818 |
[hvname for hvname in self.enabled_hypervisors |
819 |
if hvname != self.default_hypervisor] |
820 |
self.default_hypervisor = None |
821 |
|
822 |
|
823 |
def ToDict(self): |
824 |
"""Custom function for cluster.
|
825 |
|
826 |
"""
|
827 |
mydict = super(Cluster, self).ToDict() |
828 |
mydict["tcpudp_port_pool"] = list(self.tcpudp_port_pool) |
829 |
return mydict
|
830 |
|
831 |
@classmethod
|
832 |
def FromDict(cls, val): |
833 |
"""Custom function for cluster.
|
834 |
|
835 |
"""
|
836 |
obj = super(Cluster, cls).FromDict(val)
|
837 |
if not isinstance(obj.tcpudp_port_pool, set): |
838 |
obj.tcpudp_port_pool = set(obj.tcpudp_port_pool)
|
839 |
return obj
|
840 |
|
841 |
def FillHV(self, instance): |
842 |
"""Fill an instance's hvparams dict.
|
843 |
|
844 |
@type instance: L{objects.Instance}
|
845 |
@param instance: the instance parameter to fill
|
846 |
@rtype: dict
|
847 |
@return: a copy of the instance's hvparams with missing keys filled from
|
848 |
the cluster defaults
|
849 |
|
850 |
"""
|
851 |
return FillDict(self.hvparams.get(instance.hypervisor, {}), |
852 |
instance.hvparams) |
853 |
|
854 |
def FillBE(self, instance): |
855 |
"""Fill an instance's beparams dict.
|
856 |
|
857 |
@type instance: L{objects.Instance}
|
858 |
@param instance: the instance parameter to fill
|
859 |
@rtype: dict
|
860 |
@return: a copy of the instance's beparams with missing keys filled from
|
861 |
the cluster defaults
|
862 |
|
863 |
"""
|
864 |
return FillDict(self.beparams.get(constants.PP_DEFAULT, {}), |
865 |
instance.beparams) |
866 |
|
867 |
|
868 |
class BlockDevStatus(ConfigObject): |
869 |
"""Config object representing the status of a block device."""
|
870 |
__slots__ = [ |
871 |
"dev_path",
|
872 |
"major",
|
873 |
"minor",
|
874 |
"sync_percent",
|
875 |
"estimated_time",
|
876 |
"is_degraded",
|
877 |
"ldisk_status",
|
878 |
] |
879 |
|
880 |
|
881 |
class ConfdRequest(ConfigObject): |
882 |
"""Object holding a confd request.
|
883 |
|
884 |
@ivar protocol: confd protocol version
|
885 |
@ivar type: confd query type
|
886 |
@ivar query: query request
|
887 |
@ivar rsalt: requested reply salt
|
888 |
|
889 |
"""
|
890 |
__slots__ = [ |
891 |
"protocol",
|
892 |
"type",
|
893 |
"query",
|
894 |
"rsalt",
|
895 |
] |
896 |
|
897 |
|
898 |
class ConfdReply(ConfigObject): |
899 |
"""Object holding a confd reply.
|
900 |
|
901 |
@ivar protocol: confd protocol version
|
902 |
@ivar status: reply status code (ok, error)
|
903 |
@ivar answer: confd query reply
|
904 |
@ivar serial: configuration serial number
|
905 |
|
906 |
"""
|
907 |
__slots__ = [ |
908 |
"protocol",
|
909 |
"status",
|
910 |
"answer",
|
911 |
"serial",
|
912 |
] |
913 |
|
914 |
|
915 |
class SerializableConfigParser(ConfigParser.SafeConfigParser): |
916 |
"""Simple wrapper over ConfigParse that allows serialization.
|
917 |
|
918 |
This class is basically ConfigParser.SafeConfigParser with two
|
919 |
additional methods that allow it to serialize/unserialize to/from a
|
920 |
buffer.
|
921 |
|
922 |
"""
|
923 |
def Dumps(self): |
924 |
"""Dump this instance and return the string representation."""
|
925 |
buf = StringIO() |
926 |
self.write(buf)
|
927 |
return buf.getvalue()
|
928 |
|
929 |
@staticmethod
|
930 |
def Loads(data): |
931 |
"""Load data from a string."""
|
932 |
buf = StringIO(data) |
933 |
cfp = SerializableConfigParser() |
934 |
cfp.readfp(buf) |
935 |
return cfp
|