root / lib / objects.py @ d06565e0
History | View | Annotate | Download (18.9 kB)
1 | 2f31098c | Iustin Pop | #
|
---|---|---|---|
2 | a8083063 | Iustin Pop | #
|
3 | a8083063 | Iustin Pop | |
4 | a8083063 | Iustin Pop | # Copyright (C) 2006, 2007 Google Inc.
|
5 | a8083063 | Iustin Pop | #
|
6 | a8083063 | Iustin Pop | # This program is free software; you can redistribute it and/or modify
|
7 | a8083063 | Iustin Pop | # it under the terms of the GNU General Public License as published by
|
8 | a8083063 | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or
|
9 | a8083063 | Iustin Pop | # (at your option) any later version.
|
10 | a8083063 | Iustin Pop | #
|
11 | a8083063 | Iustin Pop | # This program is distributed in the hope that it will be useful, but
|
12 | a8083063 | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 | a8083063 | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
14 | a8083063 | Iustin Pop | # General Public License for more details.
|
15 | a8083063 | Iustin Pop | #
|
16 | a8083063 | Iustin Pop | # You should have received a copy of the GNU General Public License
|
17 | a8083063 | Iustin Pop | # along with this program; if not, write to the Free Software
|
18 | a8083063 | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
19 | a8083063 | Iustin Pop | # 02110-1301, USA.
|
20 | a8083063 | Iustin Pop | |
21 | a8083063 | Iustin Pop | |
22 | a8083063 | Iustin Pop | """Transportable objects for Ganeti.
|
23 | a8083063 | Iustin Pop |
|
24 | a8083063 | Iustin Pop | This module provides small, mostly data-only objects which are safe to
|
25 | a8083063 | Iustin Pop | pass to and from external parties.
|
26 | a8083063 | Iustin Pop |
|
27 | a8083063 | Iustin Pop | """
|
28 | a8083063 | Iustin Pop | |
29 | a8083063 | Iustin Pop | |
30 | 319856a9 | Michael Hanselmann | import simplejson |
31 | a8083063 | Iustin Pop | import ConfigParser |
32 | 5c947f38 | Iustin Pop | import re |
33 | d5835922 | Michael Hanselmann | from cStringIO import StringIO |
34 | a8083063 | Iustin Pop | |
35 | a8083063 | Iustin Pop | from ganeti import errors |
36 | 5c947f38 | Iustin Pop | from ganeti import constants |
37 | a8083063 | Iustin Pop | |
38 | a8083063 | Iustin Pop | |
39 | a8083063 | Iustin Pop | __all__ = ["ConfigObject", "ConfigData", "NIC", "Disk", "Instance", |
40 | a8083063 | Iustin Pop | "OS", "Node", "Cluster"] |
41 | a8083063 | Iustin Pop | |
42 | a8083063 | Iustin Pop | |
43 | d5835922 | Michael Hanselmann | # Check whether the simplejson module supports indentation
|
44 | d5835922 | Michael Hanselmann | _JSON_INDENT = 2
|
45 | d5835922 | Michael Hanselmann | try:
|
46 | d5835922 | Michael Hanselmann | simplejson.dumps(1, indent=_JSON_INDENT)
|
47 | d5835922 | Michael Hanselmann | except TypeError: |
48 | d5835922 | Michael Hanselmann | _JSON_INDENT = None
|
49 | d5835922 | Michael Hanselmann | |
50 | d5835922 | Michael Hanselmann | |
51 | a8083063 | Iustin Pop | class ConfigObject(object): |
52 | a8083063 | Iustin Pop | """A generic config object.
|
53 | a8083063 | Iustin Pop |
|
54 | a8083063 | Iustin Pop | It has the following properties:
|
55 | a8083063 | Iustin Pop |
|
56 | a8083063 | Iustin Pop | - provides somewhat safe recursive unpickling and pickling for its classes
|
57 | a8083063 | Iustin Pop | - unset attributes which are defined in slots are always returned
|
58 | a8083063 | Iustin Pop | as None instead of raising an error
|
59 | a8083063 | Iustin Pop |
|
60 | a8083063 | Iustin Pop | Classes derived from this must always declare __slots__ (we use many
|
61 | a8083063 | Iustin Pop | config objects and the memory reduction is useful.
|
62 | a8083063 | Iustin Pop |
|
63 | a8083063 | Iustin Pop | """
|
64 | a8083063 | Iustin Pop | __slots__ = [] |
65 | a8083063 | Iustin Pop | |
66 | a8083063 | Iustin Pop | def __init__(self, **kwargs): |
67 | 319856a9 | Michael Hanselmann | for k, v in kwargs.iteritems(): |
68 | 319856a9 | Michael Hanselmann | setattr(self, k, v) |
69 | a8083063 | Iustin Pop | |
70 | a8083063 | Iustin Pop | def __getattr__(self, name): |
71 | a8083063 | Iustin Pop | if name not in self.__slots__: |
72 | 3ecf6786 | Iustin Pop | raise AttributeError("Invalid object attribute %s.%s" % |
73 | 3ecf6786 | Iustin Pop | (type(self).__name__, name)) |
74 | a8083063 | Iustin Pop | return None |
75 | a8083063 | Iustin Pop | |
76 | 47c28c5b | Michael Hanselmann | def __setitem__(self, key, value): |
77 | 47c28c5b | Michael Hanselmann | if key not in self.__slots__: |
78 | 3ecf6786 | Iustin Pop | raise KeyError(key) |
79 | 47c28c5b | Michael Hanselmann | setattr(self, key, value) |
80 | 47c28c5b | Michael Hanselmann | |
81 | a8083063 | Iustin Pop | def __getstate__(self): |
82 | a8083063 | Iustin Pop | state = {} |
83 | a8083063 | Iustin Pop | for name in self.__slots__: |
84 | a8083063 | Iustin Pop | if hasattr(self, name): |
85 | a8083063 | Iustin Pop | state[name] = getattr(self, name) |
86 | a8083063 | Iustin Pop | return state
|
87 | a8083063 | Iustin Pop | |
88 | a8083063 | Iustin Pop | def __setstate__(self, state): |
89 | a8083063 | Iustin Pop | for name in state: |
90 | a8083063 | Iustin Pop | if name in self.__slots__: |
91 | a8083063 | Iustin Pop | setattr(self, name, state[name]) |
92 | a8083063 | Iustin Pop | |
93 | a8083063 | Iustin Pop | def Dump(self, fobj): |
94 | 319856a9 | Michael Hanselmann | """Dump to a file object.
|
95 | a8083063 | Iustin Pop |
|
96 | a8083063 | Iustin Pop | """
|
97 | d5835922 | Michael Hanselmann | data = self.ToDict()
|
98 | d5835922 | Michael Hanselmann | if _JSON_INDENT is None: |
99 | d5835922 | Michael Hanselmann | simplejson.dump(data, fobj) |
100 | d5835922 | Michael Hanselmann | else:
|
101 | d5835922 | Michael Hanselmann | simplejson.dump(data, fobj, indent=_JSON_INDENT) |
102 | a8083063 | Iustin Pop | |
103 | 319856a9 | Michael Hanselmann | @classmethod
|
104 | 319856a9 | Michael Hanselmann | def Load(cls, fobj): |
105 | 319856a9 | Michael Hanselmann | """Load data from the given stream.
|
106 | a8083063 | Iustin Pop |
|
107 | a8083063 | Iustin Pop | """
|
108 | 319856a9 | Michael Hanselmann | return cls.FromDict(simplejson.load(fobj))
|
109 | a8083063 | Iustin Pop | |
110 | a8083063 | Iustin Pop | def Dumps(self): |
111 | 319856a9 | Michael Hanselmann | """Dump and return the string representation."""
|
112 | a8083063 | Iustin Pop | buf = StringIO() |
113 | a8083063 | Iustin Pop | self.Dump(buf)
|
114 | a8083063 | Iustin Pop | return buf.getvalue()
|
115 | a8083063 | Iustin Pop | |
116 | 319856a9 | Michael Hanselmann | @classmethod
|
117 | 319856a9 | Michael Hanselmann | def Loads(cls, data): |
118 | a8083063 | Iustin Pop | """Load data from a string."""
|
119 | 319856a9 | Michael Hanselmann | return cls.Load(StringIO(data))
|
120 | a8083063 | Iustin Pop | |
121 | ff9c047c | Iustin Pop | def ToDict(self): |
122 | ff9c047c | Iustin Pop | """Convert to a dict holding only standard python types.
|
123 | ff9c047c | Iustin Pop |
|
124 | ff9c047c | Iustin Pop | The generic routine just dumps all of this object's attributes in
|
125 | ff9c047c | Iustin Pop | a dict. It does not work if the class has children who are
|
126 | ff9c047c | Iustin Pop | ConfigObjects themselves (e.g. the nics list in an Instance), in
|
127 | ff9c047c | Iustin Pop | which case the object should subclass the function in order to
|
128 | ff9c047c | Iustin Pop | make sure all objects returned are only standard python types.
|
129 | ff9c047c | Iustin Pop |
|
130 | ff9c047c | Iustin Pop | """
|
131 | ff9c047c | Iustin Pop | return dict([(k, getattr(self, k, None)) for k in self.__slots__]) |
132 | ff9c047c | Iustin Pop | |
133 | ff9c047c | Iustin Pop | @classmethod
|
134 | ff9c047c | Iustin Pop | def FromDict(cls, val): |
135 | ff9c047c | Iustin Pop | """Create an object from a dictionary.
|
136 | ff9c047c | Iustin Pop |
|
137 | ff9c047c | Iustin Pop | This generic routine takes a dict, instantiates a new instance of
|
138 | ff9c047c | Iustin Pop | the given class, and sets attributes based on the dict content.
|
139 | ff9c047c | Iustin Pop |
|
140 | ff9c047c | Iustin Pop | As for `ToDict`, this does not work if the class has children
|
141 | ff9c047c | Iustin Pop | who are ConfigObjects themselves (e.g. the nics list in an
|
142 | ff9c047c | Iustin Pop | Instance), in which case the object should subclass the function
|
143 | ff9c047c | Iustin Pop | and alter the objects.
|
144 | ff9c047c | Iustin Pop |
|
145 | ff9c047c | Iustin Pop | """
|
146 | ff9c047c | Iustin Pop | if not isinstance(val, dict): |
147 | ff9c047c | Iustin Pop | raise errors.ConfigurationError("Invalid object passed to FromDict:" |
148 | ff9c047c | Iustin Pop | " expected dict, got %s" % type(val)) |
149 | 319856a9 | Michael Hanselmann | val_str = dict([(str(k), v) for k, v in val.iteritems()]) |
150 | 319856a9 | Michael Hanselmann | obj = cls(**val_str) |
151 | ff9c047c | Iustin Pop | return obj
|
152 | ff9c047c | Iustin Pop | |
153 | ff9c047c | Iustin Pop | @staticmethod
|
154 | ff9c047c | Iustin Pop | def _ContainerToDicts(container): |
155 | ff9c047c | Iustin Pop | """Convert the elements of a container to standard python types.
|
156 | ff9c047c | Iustin Pop |
|
157 | ff9c047c | Iustin Pop | This method converts a container with elements derived from
|
158 | ff9c047c | Iustin Pop | ConfigData to standard python types. If the container is a dict,
|
159 | ff9c047c | Iustin Pop | we don't touch the keys, only the values.
|
160 | ff9c047c | Iustin Pop |
|
161 | ff9c047c | Iustin Pop | """
|
162 | ff9c047c | Iustin Pop | if isinstance(container, dict): |
163 | ff9c047c | Iustin Pop | ret = dict([(k, v.ToDict()) for k, v in container.iteritems()]) |
164 | ff9c047c | Iustin Pop | elif isinstance(container, (list, tuple, set, frozenset)): |
165 | ff9c047c | Iustin Pop | ret = [elem.ToDict() for elem in container] |
166 | ff9c047c | Iustin Pop | else:
|
167 | ff9c047c | Iustin Pop | raise TypeError("Invalid type %s passed to _ContainerToDicts" % |
168 | ff9c047c | Iustin Pop | type(container))
|
169 | ff9c047c | Iustin Pop | return ret
|
170 | ff9c047c | Iustin Pop | |
171 | ff9c047c | Iustin Pop | @staticmethod
|
172 | ff9c047c | Iustin Pop | def _ContainerFromDicts(source, c_type, e_type): |
173 | ff9c047c | Iustin Pop | """Convert a container from standard python types.
|
174 | ff9c047c | Iustin Pop |
|
175 | ff9c047c | Iustin Pop | This method converts a container with standard python types to
|
176 | ff9c047c | Iustin Pop | ConfigData objects. If the container is a dict, we don't touch the
|
177 | ff9c047c | Iustin Pop | keys, only the values.
|
178 | ff9c047c | Iustin Pop |
|
179 | ff9c047c | Iustin Pop | """
|
180 | ff9c047c | Iustin Pop | if not isinstance(c_type, type): |
181 | ff9c047c | Iustin Pop | raise TypeError("Container type %s passed to _ContainerFromDicts is" |
182 | ff9c047c | Iustin Pop | " not a type" % type(c_type)) |
183 | ff9c047c | Iustin Pop | if c_type is dict: |
184 | ff9c047c | Iustin Pop | ret = dict([(k, e_type.FromDict(v)) for k, v in source.iteritems()]) |
185 | ff9c047c | Iustin Pop | elif c_type in (list, tuple, set, frozenset): |
186 | ff9c047c | Iustin Pop | ret = c_type([e_type.FromDict(elem) for elem in source]) |
187 | ff9c047c | Iustin Pop | else:
|
188 | ff9c047c | Iustin Pop | raise TypeError("Invalid container type %s passed to" |
189 | ff9c047c | Iustin Pop | " _ContainerFromDicts" % c_type)
|
190 | ff9c047c | Iustin Pop | return ret
|
191 | ff9c047c | Iustin Pop | |
192 | ff9c047c | Iustin Pop | def __repr__(self): |
193 | ff9c047c | Iustin Pop | """Implement __repr__ for ConfigObjects."""
|
194 | ff9c047c | Iustin Pop | return repr(self.ToDict()) |
195 | ff9c047c | Iustin Pop | |
196 | a8083063 | Iustin Pop | |
197 | ec29fe40 | Iustin Pop | class TaggableObject(ConfigObject): |
198 | 5c947f38 | Iustin Pop | """An generic class supporting tags.
|
199 | 5c947f38 | Iustin Pop |
|
200 | 5c947f38 | Iustin Pop | """
|
201 | ec29fe40 | Iustin Pop | __slots__ = ConfigObject.__slots__ + ["tags"]
|
202 | 2057f6c7 | Iustin Pop | |
203 | 5c947f38 | Iustin Pop | @staticmethod
|
204 | 5c947f38 | Iustin Pop | def ValidateTag(tag): |
205 | 5c947f38 | Iustin Pop | """Check if a tag is valid.
|
206 | 5c947f38 | Iustin Pop |
|
207 | 5c947f38 | Iustin Pop | If the tag is invalid, an errors.TagError will be raised. The
|
208 | 5c947f38 | Iustin Pop | function has no return value.
|
209 | 5c947f38 | Iustin Pop |
|
210 | 5c947f38 | Iustin Pop | """
|
211 | 5c947f38 | Iustin Pop | if not isinstance(tag, basestring): |
212 | 3ecf6786 | Iustin Pop | raise errors.TagError("Invalid tag type (not a string)") |
213 | 5c947f38 | Iustin Pop | if len(tag) > constants.MAX_TAG_LEN: |
214 | 319856a9 | Michael Hanselmann | raise errors.TagError("Tag too long (>%d characters)" % |
215 | 319856a9 | Michael Hanselmann | constants.MAX_TAG_LEN) |
216 | 5c947f38 | Iustin Pop | if not tag: |
217 | 3ecf6786 | Iustin Pop | raise errors.TagError("Tags cannot be empty") |
218 | 5c947f38 | Iustin Pop | if not re.match("^[ \w.+*/:-]+$", tag): |
219 | 3ecf6786 | Iustin Pop | raise errors.TagError("Tag contains invalid characters") |
220 | 5c947f38 | Iustin Pop | |
221 | 5c947f38 | Iustin Pop | def GetTags(self): |
222 | 5c947f38 | Iustin Pop | """Return the tags list.
|
223 | 5c947f38 | Iustin Pop |
|
224 | 5c947f38 | Iustin Pop | """
|
225 | 5c947f38 | Iustin Pop | tags = getattr(self, "tags", None) |
226 | 5c947f38 | Iustin Pop | if tags is None: |
227 | 5c947f38 | Iustin Pop | tags = self.tags = set() |
228 | 5c947f38 | Iustin Pop | return tags
|
229 | 5c947f38 | Iustin Pop | |
230 | 5c947f38 | Iustin Pop | def AddTag(self, tag): |
231 | 5c947f38 | Iustin Pop | """Add a new tag.
|
232 | 5c947f38 | Iustin Pop |
|
233 | 5c947f38 | Iustin Pop | """
|
234 | 5c947f38 | Iustin Pop | self.ValidateTag(tag)
|
235 | 5c947f38 | Iustin Pop | tags = self.GetTags()
|
236 | 5c947f38 | Iustin Pop | if len(tags) >= constants.MAX_TAGS_PER_OBJ: |
237 | 3ecf6786 | Iustin Pop | raise errors.TagError("Too many tags") |
238 | 5c947f38 | Iustin Pop | self.GetTags().add(tag)
|
239 | 5c947f38 | Iustin Pop | |
240 | 5c947f38 | Iustin Pop | def RemoveTag(self, tag): |
241 | 5c947f38 | Iustin Pop | """Remove a tag.
|
242 | 5c947f38 | Iustin Pop |
|
243 | 5c947f38 | Iustin Pop | """
|
244 | 5c947f38 | Iustin Pop | self.ValidateTag(tag)
|
245 | 5c947f38 | Iustin Pop | tags = self.GetTags()
|
246 | 5c947f38 | Iustin Pop | try:
|
247 | 5c947f38 | Iustin Pop | tags.remove(tag) |
248 | 5c947f38 | Iustin Pop | except KeyError: |
249 | 3ecf6786 | Iustin Pop | raise errors.TagError("Tag not found") |
250 | 5c947f38 | Iustin Pop | |
251 | ff9c047c | Iustin Pop | def ToDict(self): |
252 | ff9c047c | Iustin Pop | """Taggable-object-specific conversion to standard python types.
|
253 | ff9c047c | Iustin Pop |
|
254 | ff9c047c | Iustin Pop | This replaces the tags set with a list.
|
255 | ff9c047c | Iustin Pop |
|
256 | ff9c047c | Iustin Pop | """
|
257 | ff9c047c | Iustin Pop | bo = super(TaggableObject, self).ToDict() |
258 | ff9c047c | Iustin Pop | |
259 | ff9c047c | Iustin Pop | tags = bo.get("tags", None) |
260 | ff9c047c | Iustin Pop | if isinstance(tags, set): |
261 | ff9c047c | Iustin Pop | bo["tags"] = list(tags) |
262 | ff9c047c | Iustin Pop | return bo
|
263 | ff9c047c | Iustin Pop | |
264 | ff9c047c | Iustin Pop | @classmethod
|
265 | ff9c047c | Iustin Pop | def FromDict(cls, val): |
266 | ff9c047c | Iustin Pop | """Custom function for instances.
|
267 | ff9c047c | Iustin Pop |
|
268 | ff9c047c | Iustin Pop | """
|
269 | ff9c047c | Iustin Pop | obj = super(TaggableObject, cls).FromDict(val)
|
270 | ff9c047c | Iustin Pop | if hasattr(obj, "tags") and isinstance(obj.tags, list): |
271 | ff9c047c | Iustin Pop | obj.tags = set(obj.tags)
|
272 | ff9c047c | Iustin Pop | return obj
|
273 | ff9c047c | Iustin Pop | |
274 | 5c947f38 | Iustin Pop | |
275 | a8083063 | Iustin Pop | class ConfigData(ConfigObject): |
276 | a8083063 | Iustin Pop | """Top-level config object."""
|
277 | b2fddf63 | Iustin Pop | __slots__ = ["cluster", "nodes", "instances"] |
278 | a8083063 | Iustin Pop | |
279 | ff9c047c | Iustin Pop | def ToDict(self): |
280 | ff9c047c | Iustin Pop | """Custom function for top-level config data.
|
281 | ff9c047c | Iustin Pop |
|
282 | ff9c047c | Iustin Pop | This just replaces the list of instances, nodes and the cluster
|
283 | ff9c047c | Iustin Pop | with standard python types.
|
284 | ff9c047c | Iustin Pop |
|
285 | ff9c047c | Iustin Pop | """
|
286 | ff9c047c | Iustin Pop | mydict = super(ConfigData, self).ToDict() |
287 | ff9c047c | Iustin Pop | mydict["cluster"] = mydict["cluster"].ToDict() |
288 | ff9c047c | Iustin Pop | for key in "nodes", "instances": |
289 | ff9c047c | Iustin Pop | mydict[key] = self._ContainerToDicts(mydict[key])
|
290 | ff9c047c | Iustin Pop | |
291 | ff9c047c | Iustin Pop | return mydict
|
292 | ff9c047c | Iustin Pop | |
293 | ff9c047c | Iustin Pop | @classmethod
|
294 | ff9c047c | Iustin Pop | def FromDict(cls, val): |
295 | ff9c047c | Iustin Pop | """Custom function for top-level config data
|
296 | ff9c047c | Iustin Pop |
|
297 | ff9c047c | Iustin Pop | """
|
298 | ff9c047c | Iustin Pop | obj = super(ConfigData, cls).FromDict(val)
|
299 | ff9c047c | Iustin Pop | obj.cluster = Cluster.FromDict(obj.cluster) |
300 | ff9c047c | Iustin Pop | obj.nodes = cls._ContainerFromDicts(obj.nodes, dict, Node)
|
301 | ff9c047c | Iustin Pop | obj.instances = cls._ContainerFromDicts(obj.instances, dict, Instance)
|
302 | ff9c047c | Iustin Pop | return obj
|
303 | ff9c047c | Iustin Pop | |
304 | a8083063 | Iustin Pop | |
305 | a8083063 | Iustin Pop | class NIC(ConfigObject): |
306 | a8083063 | Iustin Pop | """Config object representing a network card."""
|
307 | a8083063 | Iustin Pop | __slots__ = ["mac", "ip", "bridge"] |
308 | a8083063 | Iustin Pop | |
309 | a8083063 | Iustin Pop | |
310 | a8083063 | Iustin Pop | class Disk(ConfigObject): |
311 | a8083063 | Iustin Pop | """Config object representing a block device."""
|
312 | a8083063 | Iustin Pop | __slots__ = ["dev_type", "logical_id", "physical_id", |
313 | a8083063 | Iustin Pop | "children", "iv_name", "size"] |
314 | a8083063 | Iustin Pop | |
315 | a8083063 | Iustin Pop | def CreateOnSecondary(self): |
316 | a8083063 | Iustin Pop | """Test if this device needs to be created on a secondary node."""
|
317 | a1f445d3 | Iustin Pop | return self.dev_type in (constants.LD_DRBD7, constants.LD_DRBD8, |
318 | a1f445d3 | Iustin Pop | constants.LD_LV) |
319 | a8083063 | Iustin Pop | |
320 | a8083063 | Iustin Pop | def AssembleOnSecondary(self): |
321 | a8083063 | Iustin Pop | """Test if this device needs to be assembled on a secondary node."""
|
322 | a1f445d3 | Iustin Pop | return self.dev_type in (constants.LD_DRBD7, constants.LD_DRBD8, |
323 | a1f445d3 | Iustin Pop | constants.LD_LV) |
324 | a8083063 | Iustin Pop | |
325 | a8083063 | Iustin Pop | def OpenOnSecondary(self): |
326 | a8083063 | Iustin Pop | """Test if this device needs to be opened on a secondary node."""
|
327 | fe96220b | Iustin Pop | return self.dev_type in (constants.LD_LV,) |
328 | a8083063 | Iustin Pop | |
329 | a8083063 | Iustin Pop | def GetNodes(self, node): |
330 | a8083063 | Iustin Pop | """This function returns the nodes this device lives on.
|
331 | a8083063 | Iustin Pop |
|
332 | a8083063 | Iustin Pop | Given the node on which the parent of the device lives on (or, in
|
333 | a8083063 | Iustin Pop | case of a top-level device, the primary node of the devices'
|
334 | a8083063 | Iustin Pop | instance), this function will return a list of nodes on which this
|
335 | a8083063 | Iustin Pop | devices needs to (or can) be assembled.
|
336 | a8083063 | Iustin Pop |
|
337 | a8083063 | Iustin Pop | """
|
338 | fe96220b | Iustin Pop | if self.dev_type == constants.LD_LV or self.dev_type == constants.LD_MD_R1: |
339 | a8083063 | Iustin Pop | result = [node] |
340 | a1f445d3 | Iustin Pop | elif self.dev_type in constants.LDS_DRBD: |
341 | a8083063 | Iustin Pop | result = [self.logical_id[0], self.logical_id[1]] |
342 | a8083063 | Iustin Pop | if node not in result: |
343 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("DRBD device passed unknown node") |
344 | a8083063 | Iustin Pop | else:
|
345 | 3ecf6786 | Iustin Pop | raise errors.ProgrammerError("Unhandled device type %s" % self.dev_type) |
346 | a8083063 | Iustin Pop | return result
|
347 | a8083063 | Iustin Pop | |
348 | a8083063 | Iustin Pop | def ComputeNodeTree(self, parent_node): |
349 | a8083063 | Iustin Pop | """Compute the node/disk tree for this disk and its children.
|
350 | a8083063 | Iustin Pop |
|
351 | a8083063 | Iustin Pop | This method, given the node on which the parent disk lives, will
|
352 | a8083063 | Iustin Pop | return the list of all (node, disk) pairs which describe the disk
|
353 | a8083063 | Iustin Pop | tree in the most compact way. For example, a md/drbd/lvm stack
|
354 | a8083063 | Iustin Pop | will be returned as (primary_node, md) and (secondary_node, drbd)
|
355 | a8083063 | Iustin Pop | which represents all the top-level devices on the nodes. This
|
356 | a8083063 | Iustin Pop | means that on the primary node we need to activate the the md (and
|
357 | a8083063 | Iustin Pop | recursively all its children) and on the secondary node we need to
|
358 | a8083063 | Iustin Pop | activate the drbd device (and its children, the two lvm volumes).
|
359 | a8083063 | Iustin Pop |
|
360 | a8083063 | Iustin Pop | """
|
361 | a8083063 | Iustin Pop | my_nodes = self.GetNodes(parent_node)
|
362 | a8083063 | Iustin Pop | result = [(node, self) for node in my_nodes] |
363 | a8083063 | Iustin Pop | if not self.children: |
364 | a8083063 | Iustin Pop | # leaf device
|
365 | a8083063 | Iustin Pop | return result
|
366 | a8083063 | Iustin Pop | for node in my_nodes: |
367 | a8083063 | Iustin Pop | for child in self.children: |
368 | a8083063 | Iustin Pop | child_result = child.ComputeNodeTree(node) |
369 | a8083063 | Iustin Pop | if len(child_result) == 1: |
370 | a8083063 | Iustin Pop | # child (and all its descendants) is simple, doesn't split
|
371 | a8083063 | Iustin Pop | # over multiple hosts, so we don't need to describe it, our
|
372 | a8083063 | Iustin Pop | # own entry for this node describes it completely
|
373 | a8083063 | Iustin Pop | continue
|
374 | a8083063 | Iustin Pop | else:
|
375 | a8083063 | Iustin Pop | # check if child nodes differ from my nodes; note that
|
376 | a8083063 | Iustin Pop | # subdisk can differ from the child itself, and be instead
|
377 | a8083063 | Iustin Pop | # one of its descendants
|
378 | a8083063 | Iustin Pop | for subnode, subdisk in child_result: |
379 | a8083063 | Iustin Pop | if subnode not in my_nodes: |
380 | a8083063 | Iustin Pop | result.append((subnode, subdisk)) |
381 | a8083063 | Iustin Pop | # otherwise child is under our own node, so we ignore this
|
382 | a8083063 | Iustin Pop | # entry (but probably the other results in the list will
|
383 | a8083063 | Iustin Pop | # be different)
|
384 | a8083063 | Iustin Pop | return result
|
385 | a8083063 | Iustin Pop | |
386 | ff9c047c | Iustin Pop | def ToDict(self): |
387 | ff9c047c | Iustin Pop | """Disk-specific conversion to standard python types.
|
388 | ff9c047c | Iustin Pop |
|
389 | ff9c047c | Iustin Pop | This replaces the children lists of objects with lists of
|
390 | ff9c047c | Iustin Pop | standard python types.
|
391 | ff9c047c | Iustin Pop |
|
392 | ff9c047c | Iustin Pop | """
|
393 | ff9c047c | Iustin Pop | bo = super(Disk, self).ToDict() |
394 | ff9c047c | Iustin Pop | |
395 | ff9c047c | Iustin Pop | for attr in ("children",): |
396 | ff9c047c | Iustin Pop | alist = bo.get(attr, None)
|
397 | ff9c047c | Iustin Pop | if alist:
|
398 | ff9c047c | Iustin Pop | bo[attr] = self._ContainerToDicts(alist)
|
399 | ff9c047c | Iustin Pop | return bo
|
400 | ff9c047c | Iustin Pop | |
401 | ff9c047c | Iustin Pop | @classmethod
|
402 | ff9c047c | Iustin Pop | def FromDict(cls, val): |
403 | ff9c047c | Iustin Pop | """Custom function for Disks
|
404 | ff9c047c | Iustin Pop |
|
405 | ff9c047c | Iustin Pop | """
|
406 | ff9c047c | Iustin Pop | obj = super(Disk, cls).FromDict(val)
|
407 | ff9c047c | Iustin Pop | if obj.children:
|
408 | ff9c047c | Iustin Pop | obj.children = cls._ContainerFromDicts(obj.children, list, Disk)
|
409 | ff9c047c | Iustin Pop | if obj.logical_id and isinstance(obj.logical_id, list): |
410 | ff9c047c | Iustin Pop | obj.logical_id = tuple(obj.logical_id)
|
411 | ff9c047c | Iustin Pop | if obj.physical_id and isinstance(obj.physical_id, list): |
412 | ff9c047c | Iustin Pop | obj.physical_id = tuple(obj.physical_id)
|
413 | ff9c047c | Iustin Pop | return obj
|
414 | ff9c047c | Iustin Pop | |
415 | 65a15336 | Iustin Pop | def __str__(self): |
416 | 65a15336 | Iustin Pop | """Custom str() formatter for disks.
|
417 | 65a15336 | Iustin Pop |
|
418 | 65a15336 | Iustin Pop | """
|
419 | 65a15336 | Iustin Pop | if self.dev_type == constants.LD_LV: |
420 | 65a15336 | Iustin Pop | val = "<LogicalVolume(/dev/%s/%s" % self.logical_id |
421 | 65a15336 | Iustin Pop | elif self.dev_type in constants.LDS_DRBD: |
422 | 65a15336 | Iustin Pop | if self.dev_type == constants.LD_DRBD7: |
423 | 65a15336 | Iustin Pop | val = "<DRBD7("
|
424 | 65a15336 | Iustin Pop | else:
|
425 | 65a15336 | Iustin Pop | val = "<DRBD8("
|
426 | 65a15336 | Iustin Pop | val += ("hosts=%s-%s, port=%s, configured as %s:%s %s:%s, " %
|
427 | 65a15336 | Iustin Pop | (self.logical_id[0], self.logical_id[1], self.logical_id[2], |
428 | 65a15336 | Iustin Pop | self.physical_id[0], self.physical_id[1], |
429 | 65a15336 | Iustin Pop | self.physical_id[2], self.physical_id[3])) |
430 | 65a15336 | Iustin Pop | if self.children and self.children.count(None) == 0: |
431 | 65a15336 | Iustin Pop | val += "backend=%s, metadev=%s" % (self.children[0], self.children[1]) |
432 | 65a15336 | Iustin Pop | else:
|
433 | 65a15336 | Iustin Pop | val += "no local storage"
|
434 | 65a15336 | Iustin Pop | elif self.dev_type == constants.LD_MD_R1: |
435 | 65a15336 | Iustin Pop | val = "<MD_R1(uuid=%s, children=%s" % (self.physical_id, self.children) |
436 | 65a15336 | Iustin Pop | else:
|
437 | 65a15336 | Iustin Pop | val = ("<Disk(type=%s, logical_id=%s, physical_id=%s, children=%s" %
|
438 | 65a15336 | Iustin Pop | (self.dev_type, self.logical_id, self.physical_id, self.children)) |
439 | 65a15336 | Iustin Pop | if self.iv_name is None: |
440 | 65a15336 | Iustin Pop | val += ", not visible"
|
441 | 65a15336 | Iustin Pop | else:
|
442 | 65a15336 | Iustin Pop | val += ", visible as /dev/%s" % self.iv_name |
443 | 65a15336 | Iustin Pop | val += ", size=%dm)>" % self.size |
444 | 65a15336 | Iustin Pop | return val
|
445 | 65a15336 | Iustin Pop | |
446 | a8083063 | Iustin Pop | |
447 | ec29fe40 | Iustin Pop | class Instance(TaggableObject): |
448 | a8083063 | Iustin Pop | """Config object representing an instance."""
|
449 | ec29fe40 | Iustin Pop | __slots__ = TaggableObject.__slots__ + [ |
450 | a8083063 | Iustin Pop | "name",
|
451 | a8083063 | Iustin Pop | "primary_node",
|
452 | a8083063 | Iustin Pop | "os",
|
453 | a8083063 | Iustin Pop | "status",
|
454 | a8083063 | Iustin Pop | "memory",
|
455 | a8083063 | Iustin Pop | "vcpus",
|
456 | a8083063 | Iustin Pop | "nics",
|
457 | a8083063 | Iustin Pop | "disks",
|
458 | a8083063 | Iustin Pop | "disk_template",
|
459 | a8083063 | Iustin Pop | ] |
460 | a8083063 | Iustin Pop | |
461 | a8083063 | Iustin Pop | def _ComputeSecondaryNodes(self): |
462 | a8083063 | Iustin Pop | """Compute the list of secondary nodes.
|
463 | a8083063 | Iustin Pop |
|
464 | a8083063 | Iustin Pop | Since the data is already there (in the drbd disks), keeping it as
|
465 | a8083063 | Iustin Pop | a separate normal attribute is redundant and if not properly
|
466 | a8083063 | Iustin Pop | synchronised can cause problems. Thus it's better to compute it
|
467 | a8083063 | Iustin Pop | dynamically.
|
468 | a8083063 | Iustin Pop |
|
469 | a8083063 | Iustin Pop | """
|
470 | a8083063 | Iustin Pop | def _Helper(primary, sec_nodes, device): |
471 | a8083063 | Iustin Pop | """Recursively computes secondary nodes given a top device."""
|
472 | a1f445d3 | Iustin Pop | if device.dev_type in constants.LDS_DRBD: |
473 | a8083063 | Iustin Pop | nodea, nodeb, dummy = device.logical_id |
474 | a8083063 | Iustin Pop | if nodea == primary:
|
475 | a8083063 | Iustin Pop | candidate = nodeb |
476 | a8083063 | Iustin Pop | else:
|
477 | a8083063 | Iustin Pop | candidate = nodea |
478 | a8083063 | Iustin Pop | if candidate not in sec_nodes: |
479 | a8083063 | Iustin Pop | sec_nodes.append(candidate) |
480 | a8083063 | Iustin Pop | if device.children:
|
481 | a8083063 | Iustin Pop | for child in device.children: |
482 | a8083063 | Iustin Pop | _Helper(primary, sec_nodes, child) |
483 | a8083063 | Iustin Pop | |
484 | a8083063 | Iustin Pop | secondary_nodes = [] |
485 | a8083063 | Iustin Pop | for device in self.disks: |
486 | a8083063 | Iustin Pop | _Helper(self.primary_node, secondary_nodes, device)
|
487 | a8083063 | Iustin Pop | return tuple(secondary_nodes) |
488 | a8083063 | Iustin Pop | |
489 | a8083063 | Iustin Pop | secondary_nodes = property(_ComputeSecondaryNodes, None, None, |
490 | a8083063 | Iustin Pop | "List of secondary nodes")
|
491 | a8083063 | Iustin Pop | |
492 | a8083063 | Iustin Pop | def MapLVsByNode(self, lvmap=None, devs=None, node=None): |
493 | a8083063 | Iustin Pop | """Provide a mapping of nodes to LVs this instance owns.
|
494 | a8083063 | Iustin Pop |
|
495 | a8083063 | Iustin Pop | This function figures out what logical volumes should belong on which
|
496 | a8083063 | Iustin Pop | nodes, recursing through a device tree.
|
497 | a8083063 | Iustin Pop |
|
498 | a8083063 | Iustin Pop | Args:
|
499 | a8083063 | Iustin Pop | lvmap: (optional) a dictionary to receive the 'node' : ['lv', ...] data.
|
500 | a8083063 | Iustin Pop |
|
501 | a8083063 | Iustin Pop | Returns:
|
502 | a8083063 | Iustin Pop | None if lvmap arg is given.
|
503 | a8083063 | Iustin Pop | Otherwise, { 'nodename' : ['volume1', 'volume2', ...], ... }
|
504 | a8083063 | Iustin Pop |
|
505 | a8083063 | Iustin Pop | """
|
506 | a8083063 | Iustin Pop | if node == None: |
507 | a8083063 | Iustin Pop | node = self.primary_node
|
508 | a8083063 | Iustin Pop | |
509 | a8083063 | Iustin Pop | if lvmap is None: |
510 | a8083063 | Iustin Pop | lvmap = { node : [] } |
511 | a8083063 | Iustin Pop | ret = lvmap |
512 | a8083063 | Iustin Pop | else:
|
513 | a8083063 | Iustin Pop | if not node in lvmap: |
514 | a8083063 | Iustin Pop | lvmap[node] = [] |
515 | a8083063 | Iustin Pop | ret = None
|
516 | a8083063 | Iustin Pop | |
517 | a8083063 | Iustin Pop | if not devs: |
518 | a8083063 | Iustin Pop | devs = self.disks
|
519 | a8083063 | Iustin Pop | |
520 | a8083063 | Iustin Pop | for dev in devs: |
521 | fe96220b | Iustin Pop | if dev.dev_type == constants.LD_LV:
|
522 | a8083063 | Iustin Pop | lvmap[node].append(dev.logical_id[1])
|
523 | a8083063 | Iustin Pop | |
524 | a1f445d3 | Iustin Pop | elif dev.dev_type in constants.LDS_DRBD: |
525 | a8083063 | Iustin Pop | if dev.logical_id[0] not in lvmap: |
526 | a8083063 | Iustin Pop | lvmap[dev.logical_id[0]] = []
|
527 | a8083063 | Iustin Pop | |
528 | a8083063 | Iustin Pop | if dev.logical_id[1] not in lvmap: |
529 | a8083063 | Iustin Pop | lvmap[dev.logical_id[1]] = []
|
530 | a8083063 | Iustin Pop | |
531 | a8083063 | Iustin Pop | if dev.children:
|
532 | a8083063 | Iustin Pop | self.MapLVsByNode(lvmap, dev.children, dev.logical_id[0]) |
533 | a8083063 | Iustin Pop | self.MapLVsByNode(lvmap, dev.children, dev.logical_id[1]) |
534 | a8083063 | Iustin Pop | |
535 | a8083063 | Iustin Pop | elif dev.children:
|
536 | a8083063 | Iustin Pop | self.MapLVsByNode(lvmap, dev.children, node)
|
537 | a8083063 | Iustin Pop | |
538 | a8083063 | Iustin Pop | return ret
|
539 | a8083063 | Iustin Pop | |
540 | 644eeef9 | Iustin Pop | def FindDisk(self, name): |
541 | 644eeef9 | Iustin Pop | """Find a disk given having a specified name.
|
542 | 644eeef9 | Iustin Pop |
|
543 | 644eeef9 | Iustin Pop | This will return the disk which has the given iv_name.
|
544 | 644eeef9 | Iustin Pop |
|
545 | 644eeef9 | Iustin Pop | """
|
546 | 644eeef9 | Iustin Pop | for disk in self.disks: |
547 | 644eeef9 | Iustin Pop | if disk.iv_name == name:
|
548 | 644eeef9 | Iustin Pop | return disk
|
549 | 644eeef9 | Iustin Pop | |
550 | 644eeef9 | Iustin Pop | return None |
551 | 644eeef9 | Iustin Pop | |
552 | ff9c047c | Iustin Pop | def ToDict(self): |
553 | ff9c047c | Iustin Pop | """Instance-specific conversion to standard python types.
|
554 | ff9c047c | Iustin Pop |
|
555 | ff9c047c | Iustin Pop | This replaces the children lists of objects with lists of standard
|
556 | ff9c047c | Iustin Pop | python types.
|
557 | ff9c047c | Iustin Pop |
|
558 | ff9c047c | Iustin Pop | """
|
559 | ff9c047c | Iustin Pop | bo = super(Instance, self).ToDict() |
560 | ff9c047c | Iustin Pop | |
561 | ff9c047c | Iustin Pop | for attr in "nics", "disks": |
562 | ff9c047c | Iustin Pop | alist = bo.get(attr, None)
|
563 | ff9c047c | Iustin Pop | if alist:
|
564 | ff9c047c | Iustin Pop | nlist = self._ContainerToDicts(alist)
|
565 | ff9c047c | Iustin Pop | else:
|
566 | ff9c047c | Iustin Pop | nlist = [] |
567 | ff9c047c | Iustin Pop | bo[attr] = nlist |
568 | ff9c047c | Iustin Pop | return bo
|
569 | ff9c047c | Iustin Pop | |
570 | ff9c047c | Iustin Pop | @classmethod
|
571 | ff9c047c | Iustin Pop | def FromDict(cls, val): |
572 | ff9c047c | Iustin Pop | """Custom function for instances.
|
573 | ff9c047c | Iustin Pop |
|
574 | ff9c047c | Iustin Pop | """
|
575 | ff9c047c | Iustin Pop | obj = super(Instance, cls).FromDict(val)
|
576 | ff9c047c | Iustin Pop | obj.nics = cls._ContainerFromDicts(obj.nics, list, NIC)
|
577 | ff9c047c | Iustin Pop | obj.disks = cls._ContainerFromDicts(obj.disks, list, Disk)
|
578 | ff9c047c | Iustin Pop | return obj
|
579 | ff9c047c | Iustin Pop | |
580 | a8083063 | Iustin Pop | |
581 | a8083063 | Iustin Pop | class OS(ConfigObject): |
582 | a8083063 | Iustin Pop | """Config object representing an operating system."""
|
583 | a8083063 | Iustin Pop | __slots__ = [ |
584 | a8083063 | Iustin Pop | "name",
|
585 | a8083063 | Iustin Pop | "path",
|
586 | a8083063 | Iustin Pop | "api_version",
|
587 | a8083063 | Iustin Pop | "create_script",
|
588 | a8083063 | Iustin Pop | "export_script",
|
589 | 386b57af | Iustin Pop | "import_script",
|
590 | 386b57af | Iustin Pop | "rename_script",
|
591 | a8083063 | Iustin Pop | ] |
592 | a8083063 | Iustin Pop | |
593 | a8083063 | Iustin Pop | |
594 | ec29fe40 | Iustin Pop | class Node(TaggableObject): |
595 | a8083063 | Iustin Pop | """Config object representing a node."""
|
596 | ec29fe40 | Iustin Pop | __slots__ = TaggableObject.__slots__ + [ |
597 | ec29fe40 | Iustin Pop | "name",
|
598 | ec29fe40 | Iustin Pop | "primary_ip",
|
599 | ec29fe40 | Iustin Pop | "secondary_ip",
|
600 | ec29fe40 | Iustin Pop | ] |
601 | a8083063 | Iustin Pop | |
602 | a8083063 | Iustin Pop | |
603 | ec29fe40 | Iustin Pop | class Cluster(TaggableObject): |
604 | a8083063 | Iustin Pop | """Config object representing the cluster."""
|
605 | ec29fe40 | Iustin Pop | __slots__ = TaggableObject.__slots__ + [ |
606 | a8083063 | Iustin Pop | "config_version",
|
607 | a8083063 | Iustin Pop | "serial_no",
|
608 | a8083063 | Iustin Pop | "rsahostkeypub",
|
609 | a8083063 | Iustin Pop | "highest_used_port",
|
610 | b2fddf63 | Iustin Pop | "tcpudp_port_pool",
|
611 | a8083063 | Iustin Pop | "mac_prefix",
|
612 | a8083063 | Iustin Pop | "volume_group_name",
|
613 | a8083063 | Iustin Pop | "default_bridge",
|
614 | a8083063 | Iustin Pop | ] |
615 | a8083063 | Iustin Pop | |
616 | 319856a9 | Michael Hanselmann | def ToDict(self): |
617 | 319856a9 | Michael Hanselmann | """Custom function for cluster.
|
618 | 319856a9 | Michael Hanselmann |
|
619 | 319856a9 | Michael Hanselmann | """
|
620 | b60ae2ca | Iustin Pop | mydict = super(Cluster, self).ToDict() |
621 | 319856a9 | Michael Hanselmann | mydict["tcpudp_port_pool"] = list(self.tcpudp_port_pool) |
622 | 319856a9 | Michael Hanselmann | return mydict
|
623 | 319856a9 | Michael Hanselmann | |
624 | 319856a9 | Michael Hanselmann | @classmethod
|
625 | 319856a9 | Michael Hanselmann | def FromDict(cls, val): |
626 | 319856a9 | Michael Hanselmann | """Custom function for cluster.
|
627 | 319856a9 | Michael Hanselmann |
|
628 | 319856a9 | Michael Hanselmann | """
|
629 | b60ae2ca | Iustin Pop | obj = super(Cluster, cls).FromDict(val)
|
630 | 319856a9 | Michael Hanselmann | if not isinstance(obj.tcpudp_port_pool, set): |
631 | 319856a9 | Michael Hanselmann | obj.tcpudp_port_pool = set(obj.tcpudp_port_pool)
|
632 | 319856a9 | Michael Hanselmann | return obj
|
633 | 319856a9 | Michael Hanselmann | |
634 | 5c947f38 | Iustin Pop | |
635 | a8083063 | Iustin Pop | class SerializableConfigParser(ConfigParser.SafeConfigParser): |
636 | a8083063 | Iustin Pop | """Simple wrapper over ConfigParse that allows serialization.
|
637 | a8083063 | Iustin Pop |
|
638 | a8083063 | Iustin Pop | This class is basically ConfigParser.SafeConfigParser with two
|
639 | a8083063 | Iustin Pop | additional methods that allow it to serialize/unserialize to/from a
|
640 | a8083063 | Iustin Pop | buffer.
|
641 | a8083063 | Iustin Pop |
|
642 | a8083063 | Iustin Pop | """
|
643 | a8083063 | Iustin Pop | def Dumps(self): |
644 | a8083063 | Iustin Pop | """Dump this instance and return the string representation."""
|
645 | a8083063 | Iustin Pop | buf = StringIO() |
646 | a8083063 | Iustin Pop | self.write(buf)
|
647 | a8083063 | Iustin Pop | return buf.getvalue()
|
648 | a8083063 | Iustin Pop | |
649 | a8083063 | Iustin Pop | @staticmethod
|
650 | a8083063 | Iustin Pop | def Loads(data): |
651 | a8083063 | Iustin Pop | """Load data from a string."""
|
652 | a8083063 | Iustin Pop | buf = StringIO(data) |
653 | a8083063 | Iustin Pop | cfp = SerializableConfigParser() |
654 | a8083063 | Iustin Pop | cfp.readfp(buf) |
655 | a8083063 | Iustin Pop | return cfp |