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2 | a8083063 | Iustin Pop | #
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3 | a8083063 | Iustin Pop | |
4 | a8083063 | Iustin Pop | # Copyright (C) 2006, 2007 Google Inc.
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5 | a8083063 | Iustin Pop | #
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6 | a8083063 | Iustin Pop | # This program is free software; you can redistribute it and/or modify
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7 | a8083063 | Iustin Pop | # it under the terms of the GNU General Public License as published by
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8 | a8083063 | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or
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9 | a8083063 | Iustin Pop | # (at your option) any later version.
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10 | a8083063 | Iustin Pop | #
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11 | a8083063 | Iustin Pop | # This program is distributed in the hope that it will be useful, but
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12 | a8083063 | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | a8083063 | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | a8083063 | Iustin Pop | # General Public License for more details.
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15 | a8083063 | Iustin Pop | #
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16 | a8083063 | Iustin Pop | # You should have received a copy of the GNU General Public License
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17 | a8083063 | Iustin Pop | # along with this program; if not, write to the Free Software
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18 | a8083063 | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | a8083063 | Iustin Pop | # 02110-1301, USA.
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20 | a8083063 | Iustin Pop | |
21 | a8083063 | Iustin Pop | |
22 | a8083063 | Iustin Pop | """Transportable objects for Ganeti.
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23 | a8083063 | Iustin Pop |
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24 | a8083063 | Iustin Pop | This module provides small, mostly data-only objects which are safe to
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25 | a8083063 | Iustin Pop | pass to and from external parties.
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26 | a8083063 | Iustin Pop |
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27 | a8083063 | Iustin Pop | """
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28 | a8083063 | Iustin Pop | |
29 | a8083063 | Iustin Pop | |
30 | a8083063 | Iustin Pop | import ConfigParser |
31 | 5c947f38 | Iustin Pop | import re |
32 | d5835922 | Michael Hanselmann | from cStringIO import StringIO |
33 | a8083063 | Iustin Pop | |
34 | a8083063 | Iustin Pop | from ganeti import errors |
35 | 5c947f38 | Iustin Pop | from ganeti import constants |
36 | a8083063 | Iustin Pop | |
37 | a8083063 | Iustin Pop | |
38 | a8083063 | Iustin Pop | __all__ = ["ConfigObject", "ConfigData", "NIC", "Disk", "Instance", |
39 | a8083063 | Iustin Pop | "OS", "Node", "Cluster"] |
40 | a8083063 | Iustin Pop | |
41 | a8083063 | Iustin Pop | |
42 | a8083063 | Iustin Pop | class ConfigObject(object): |
43 | a8083063 | Iustin Pop | """A generic config object.
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44 | a8083063 | Iustin Pop |
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45 | a8083063 | Iustin Pop | It has the following properties:
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46 | a8083063 | Iustin Pop |
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47 | a8083063 | Iustin Pop | - provides somewhat safe recursive unpickling and pickling for its classes
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48 | a8083063 | Iustin Pop | - unset attributes which are defined in slots are always returned
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49 | a8083063 | Iustin Pop | as None instead of raising an error
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50 | a8083063 | Iustin Pop |
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51 | a8083063 | Iustin Pop | Classes derived from this must always declare __slots__ (we use many
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52 | a8083063 | Iustin Pop | config objects and the memory reduction is useful.
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53 | a8083063 | Iustin Pop |
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54 | a8083063 | Iustin Pop | """
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55 | a8083063 | Iustin Pop | __slots__ = [] |
56 | a8083063 | Iustin Pop | |
57 | a8083063 | Iustin Pop | def __init__(self, **kwargs): |
58 | 319856a9 | Michael Hanselmann | for k, v in kwargs.iteritems(): |
59 | 319856a9 | Michael Hanselmann | setattr(self, k, v) |
60 | a8083063 | Iustin Pop | |
61 | a8083063 | Iustin Pop | def __getattr__(self, name): |
62 | a8083063 | Iustin Pop | if name not in self.__slots__: |
63 | 3ecf6786 | Iustin Pop | raise AttributeError("Invalid object attribute %s.%s" % |
64 | 3ecf6786 | Iustin Pop | (type(self).__name__, name)) |
65 | a8083063 | Iustin Pop | return None |
66 | a8083063 | Iustin Pop | |
67 | 47c28c5b | Michael Hanselmann | def __setitem__(self, key, value): |
68 | 47c28c5b | Michael Hanselmann | if key not in self.__slots__: |
69 | 3ecf6786 | Iustin Pop | raise KeyError(key) |
70 | 47c28c5b | Michael Hanselmann | setattr(self, key, value) |
71 | 47c28c5b | Michael Hanselmann | |
72 | a8083063 | Iustin Pop | def __getstate__(self): |
73 | a8083063 | Iustin Pop | state = {} |
74 | a8083063 | Iustin Pop | for name in self.__slots__: |
75 | a8083063 | Iustin Pop | if hasattr(self, name): |
76 | a8083063 | Iustin Pop | state[name] = getattr(self, name) |
77 | a8083063 | Iustin Pop | return state
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78 | a8083063 | Iustin Pop | |
79 | a8083063 | Iustin Pop | def __setstate__(self, state): |
80 | a8083063 | Iustin Pop | for name in state: |
81 | a8083063 | Iustin Pop | if name in self.__slots__: |
82 | a8083063 | Iustin Pop | setattr(self, name, state[name]) |
83 | a8083063 | Iustin Pop | |
84 | ff9c047c | Iustin Pop | def ToDict(self): |
85 | ff9c047c | Iustin Pop | """Convert to a dict holding only standard python types.
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86 | ff9c047c | Iustin Pop |
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87 | ff9c047c | Iustin Pop | The generic routine just dumps all of this object's attributes in
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88 | ff9c047c | Iustin Pop | a dict. It does not work if the class has children who are
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89 | ff9c047c | Iustin Pop | ConfigObjects themselves (e.g. the nics list in an Instance), in
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90 | ff9c047c | Iustin Pop | which case the object should subclass the function in order to
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91 | ff9c047c | Iustin Pop | make sure all objects returned are only standard python types.
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92 | ff9c047c | Iustin Pop |
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93 | ff9c047c | Iustin Pop | """
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94 | ff9c047c | Iustin Pop | return dict([(k, getattr(self, k, None)) for k in self.__slots__]) |
95 | ff9c047c | Iustin Pop | |
96 | ff9c047c | Iustin Pop | @classmethod
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97 | ff9c047c | Iustin Pop | def FromDict(cls, val): |
98 | ff9c047c | Iustin Pop | """Create an object from a dictionary.
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99 | ff9c047c | Iustin Pop |
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100 | ff9c047c | Iustin Pop | This generic routine takes a dict, instantiates a new instance of
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101 | ff9c047c | Iustin Pop | the given class, and sets attributes based on the dict content.
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102 | ff9c047c | Iustin Pop |
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103 | ff9c047c | Iustin Pop | As for `ToDict`, this does not work if the class has children
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104 | ff9c047c | Iustin Pop | who are ConfigObjects themselves (e.g. the nics list in an
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105 | ff9c047c | Iustin Pop | Instance), in which case the object should subclass the function
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106 | ff9c047c | Iustin Pop | and alter the objects.
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107 | ff9c047c | Iustin Pop |
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108 | ff9c047c | Iustin Pop | """
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109 | ff9c047c | Iustin Pop | if not isinstance(val, dict): |
110 | ff9c047c | Iustin Pop | raise errors.ConfigurationError("Invalid object passed to FromDict:" |
111 | ff9c047c | Iustin Pop | " expected dict, got %s" % type(val)) |
112 | 319856a9 | Michael Hanselmann | val_str = dict([(str(k), v) for k, v in val.iteritems()]) |
113 | 319856a9 | Michael Hanselmann | obj = cls(**val_str) |
114 | ff9c047c | Iustin Pop | return obj
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115 | ff9c047c | Iustin Pop | |
116 | ff9c047c | Iustin Pop | @staticmethod
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117 | ff9c047c | Iustin Pop | def _ContainerToDicts(container): |
118 | ff9c047c | Iustin Pop | """Convert the elements of a container to standard python types.
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119 | ff9c047c | Iustin Pop |
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120 | ff9c047c | Iustin Pop | This method converts a container with elements derived from
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121 | ff9c047c | Iustin Pop | ConfigData to standard python types. If the container is a dict,
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122 | ff9c047c | Iustin Pop | we don't touch the keys, only the values.
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123 | ff9c047c | Iustin Pop |
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124 | ff9c047c | Iustin Pop | """
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125 | ff9c047c | Iustin Pop | if isinstance(container, dict): |
126 | ff9c047c | Iustin Pop | ret = dict([(k, v.ToDict()) for k, v in container.iteritems()]) |
127 | ff9c047c | Iustin Pop | elif isinstance(container, (list, tuple, set, frozenset)): |
128 | ff9c047c | Iustin Pop | ret = [elem.ToDict() for elem in container] |
129 | ff9c047c | Iustin Pop | else:
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130 | ff9c047c | Iustin Pop | raise TypeError("Invalid type %s passed to _ContainerToDicts" % |
131 | ff9c047c | Iustin Pop | type(container))
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132 | ff9c047c | Iustin Pop | return ret
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133 | ff9c047c | Iustin Pop | |
134 | ff9c047c | Iustin Pop | @staticmethod
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135 | ff9c047c | Iustin Pop | def _ContainerFromDicts(source, c_type, e_type): |
136 | ff9c047c | Iustin Pop | """Convert a container from standard python types.
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137 | ff9c047c | Iustin Pop |
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138 | ff9c047c | Iustin Pop | This method converts a container with standard python types to
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139 | ff9c047c | Iustin Pop | ConfigData objects. If the container is a dict, we don't touch the
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140 | ff9c047c | Iustin Pop | keys, only the values.
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141 | ff9c047c | Iustin Pop |
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142 | ff9c047c | Iustin Pop | """
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143 | ff9c047c | Iustin Pop | if not isinstance(c_type, type): |
144 | ff9c047c | Iustin Pop | raise TypeError("Container type %s passed to _ContainerFromDicts is" |
145 | ff9c047c | Iustin Pop | " not a type" % type(c_type)) |
146 | ff9c047c | Iustin Pop | if c_type is dict: |
147 | ff9c047c | Iustin Pop | ret = dict([(k, e_type.FromDict(v)) for k, v in source.iteritems()]) |
148 | ff9c047c | Iustin Pop | elif c_type in (list, tuple, set, frozenset): |
149 | ff9c047c | Iustin Pop | ret = c_type([e_type.FromDict(elem) for elem in source]) |
150 | ff9c047c | Iustin Pop | else:
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151 | ff9c047c | Iustin Pop | raise TypeError("Invalid container type %s passed to" |
152 | ff9c047c | Iustin Pop | " _ContainerFromDicts" % c_type)
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153 | ff9c047c | Iustin Pop | return ret
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154 | ff9c047c | Iustin Pop | |
155 | ff9c047c | Iustin Pop | def __repr__(self): |
156 | ff9c047c | Iustin Pop | """Implement __repr__ for ConfigObjects."""
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157 | ff9c047c | Iustin Pop | return repr(self.ToDict()) |
158 | ff9c047c | Iustin Pop | |
159 | a8083063 | Iustin Pop | |
160 | ec29fe40 | Iustin Pop | class TaggableObject(ConfigObject): |
161 | 5c947f38 | Iustin Pop | """An generic class supporting tags.
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162 | 5c947f38 | Iustin Pop |
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163 | 5c947f38 | Iustin Pop | """
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164 | ec29fe40 | Iustin Pop | __slots__ = ConfigObject.__slots__ + ["tags"]
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165 | 2057f6c7 | Iustin Pop | |
166 | 5c947f38 | Iustin Pop | @staticmethod
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167 | 5c947f38 | Iustin Pop | def ValidateTag(tag): |
168 | 5c947f38 | Iustin Pop | """Check if a tag is valid.
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169 | 5c947f38 | Iustin Pop |
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170 | 5c947f38 | Iustin Pop | If the tag is invalid, an errors.TagError will be raised. The
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171 | 5c947f38 | Iustin Pop | function has no return value.
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172 | 5c947f38 | Iustin Pop |
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173 | 5c947f38 | Iustin Pop | """
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174 | 5c947f38 | Iustin Pop | if not isinstance(tag, basestring): |
175 | 3ecf6786 | Iustin Pop | raise errors.TagError("Invalid tag type (not a string)") |
176 | 5c947f38 | Iustin Pop | if len(tag) > constants.MAX_TAG_LEN: |
177 | 319856a9 | Michael Hanselmann | raise errors.TagError("Tag too long (>%d characters)" % |
178 | 319856a9 | Michael Hanselmann | constants.MAX_TAG_LEN) |
179 | 5c947f38 | Iustin Pop | if not tag: |
180 | 3ecf6786 | Iustin Pop | raise errors.TagError("Tags cannot be empty") |
181 | 5c947f38 | Iustin Pop | if not re.match("^[ \w.+*/:-]+$", tag): |
182 | 3ecf6786 | Iustin Pop | raise errors.TagError("Tag contains invalid characters") |
183 | 5c947f38 | Iustin Pop | |
184 | 5c947f38 | Iustin Pop | def GetTags(self): |
185 | 5c947f38 | Iustin Pop | """Return the tags list.
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186 | 5c947f38 | Iustin Pop |
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187 | 5c947f38 | Iustin Pop | """
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188 | 5c947f38 | Iustin Pop | tags = getattr(self, "tags", None) |
189 | 5c947f38 | Iustin Pop | if tags is None: |
190 | 5c947f38 | Iustin Pop | tags = self.tags = set() |
191 | 5c947f38 | Iustin Pop | return tags
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192 | 5c947f38 | Iustin Pop | |
193 | 5c947f38 | Iustin Pop | def AddTag(self, tag): |
194 | 5c947f38 | Iustin Pop | """Add a new tag.
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195 | 5c947f38 | Iustin Pop |
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196 | 5c947f38 | Iustin Pop | """
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197 | 5c947f38 | Iustin Pop | self.ValidateTag(tag)
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198 | 5c947f38 | Iustin Pop | tags = self.GetTags()
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199 | 5c947f38 | Iustin Pop | if len(tags) >= constants.MAX_TAGS_PER_OBJ: |
200 | 3ecf6786 | Iustin Pop | raise errors.TagError("Too many tags") |
201 | 5c947f38 | Iustin Pop | self.GetTags().add(tag)
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202 | 5c947f38 | Iustin Pop | |
203 | 5c947f38 | Iustin Pop | def RemoveTag(self, tag): |
204 | 5c947f38 | Iustin Pop | """Remove a tag.
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205 | 5c947f38 | Iustin Pop |
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206 | 5c947f38 | Iustin Pop | """
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207 | 5c947f38 | Iustin Pop | self.ValidateTag(tag)
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208 | 5c947f38 | Iustin Pop | tags = self.GetTags()
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209 | 5c947f38 | Iustin Pop | try:
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210 | 5c947f38 | Iustin Pop | tags.remove(tag) |
211 | 5c947f38 | Iustin Pop | except KeyError: |
212 | 3ecf6786 | Iustin Pop | raise errors.TagError("Tag not found") |
213 | 5c947f38 | Iustin Pop | |
214 | ff9c047c | Iustin Pop | def ToDict(self): |
215 | ff9c047c | Iustin Pop | """Taggable-object-specific conversion to standard python types.
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216 | ff9c047c | Iustin Pop |
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217 | ff9c047c | Iustin Pop | This replaces the tags set with a list.
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218 | ff9c047c | Iustin Pop |
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219 | ff9c047c | Iustin Pop | """
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220 | ff9c047c | Iustin Pop | bo = super(TaggableObject, self).ToDict() |
221 | ff9c047c | Iustin Pop | |
222 | ff9c047c | Iustin Pop | tags = bo.get("tags", None) |
223 | ff9c047c | Iustin Pop | if isinstance(tags, set): |
224 | ff9c047c | Iustin Pop | bo["tags"] = list(tags) |
225 | ff9c047c | Iustin Pop | return bo
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226 | ff9c047c | Iustin Pop | |
227 | ff9c047c | Iustin Pop | @classmethod
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228 | ff9c047c | Iustin Pop | def FromDict(cls, val): |
229 | ff9c047c | Iustin Pop | """Custom function for instances.
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230 | ff9c047c | Iustin Pop |
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231 | ff9c047c | Iustin Pop | """
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232 | ff9c047c | Iustin Pop | obj = super(TaggableObject, cls).FromDict(val)
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233 | ff9c047c | Iustin Pop | if hasattr(obj, "tags") and isinstance(obj.tags, list): |
234 | ff9c047c | Iustin Pop | obj.tags = set(obj.tags)
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235 | ff9c047c | Iustin Pop | return obj
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236 | ff9c047c | Iustin Pop | |
237 | 5c947f38 | Iustin Pop | |
238 | a8083063 | Iustin Pop | class ConfigData(ConfigObject): |
239 | a8083063 | Iustin Pop | """Top-level config object."""
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240 | b2fddf63 | Iustin Pop | __slots__ = ["cluster", "nodes", "instances"] |
241 | a8083063 | Iustin Pop | |
242 | ff9c047c | Iustin Pop | def ToDict(self): |
243 | ff9c047c | Iustin Pop | """Custom function for top-level config data.
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244 | ff9c047c | Iustin Pop |
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245 | ff9c047c | Iustin Pop | This just replaces the list of instances, nodes and the cluster
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246 | ff9c047c | Iustin Pop | with standard python types.
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247 | ff9c047c | Iustin Pop |
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248 | ff9c047c | Iustin Pop | """
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249 | ff9c047c | Iustin Pop | mydict = super(ConfigData, self).ToDict() |
250 | ff9c047c | Iustin Pop | mydict["cluster"] = mydict["cluster"].ToDict() |
251 | ff9c047c | Iustin Pop | for key in "nodes", "instances": |
252 | ff9c047c | Iustin Pop | mydict[key] = self._ContainerToDicts(mydict[key])
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253 | ff9c047c | Iustin Pop | |
254 | ff9c047c | Iustin Pop | return mydict
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255 | ff9c047c | Iustin Pop | |
256 | ff9c047c | Iustin Pop | @classmethod
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257 | ff9c047c | Iustin Pop | def FromDict(cls, val): |
258 | ff9c047c | Iustin Pop | """Custom function for top-level config data
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259 | ff9c047c | Iustin Pop |
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260 | ff9c047c | Iustin Pop | """
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261 | ff9c047c | Iustin Pop | obj = super(ConfigData, cls).FromDict(val)
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262 | ff9c047c | Iustin Pop | obj.cluster = Cluster.FromDict(obj.cluster) |
263 | ff9c047c | Iustin Pop | obj.nodes = cls._ContainerFromDicts(obj.nodes, dict, Node)
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264 | ff9c047c | Iustin Pop | obj.instances = cls._ContainerFromDicts(obj.instances, dict, Instance)
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265 | ff9c047c | Iustin Pop | return obj
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266 | ff9c047c | Iustin Pop | |
267 | a8083063 | Iustin Pop | |
268 | a8083063 | Iustin Pop | class NIC(ConfigObject): |
269 | a8083063 | Iustin Pop | """Config object representing a network card."""
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270 | a8083063 | Iustin Pop | __slots__ = ["mac", "ip", "bridge"] |
271 | a8083063 | Iustin Pop | |
272 | a8083063 | Iustin Pop | |
273 | a8083063 | Iustin Pop | class Disk(ConfigObject): |
274 | a8083063 | Iustin Pop | """Config object representing a block device."""
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275 | a8083063 | Iustin Pop | __slots__ = ["dev_type", "logical_id", "physical_id", |
276 | a8083063 | Iustin Pop | "children", "iv_name", "size"] |
277 | a8083063 | Iustin Pop | |
278 | a8083063 | Iustin Pop | def CreateOnSecondary(self): |
279 | a8083063 | Iustin Pop | """Test if this device needs to be created on a secondary node."""
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280 | a1f445d3 | Iustin Pop | return self.dev_type in (constants.LD_DRBD7, constants.LD_DRBD8, |
281 | a1f445d3 | Iustin Pop | constants.LD_LV) |
282 | a8083063 | Iustin Pop | |
283 | a8083063 | Iustin Pop | def AssembleOnSecondary(self): |
284 | a8083063 | Iustin Pop | """Test if this device needs to be assembled on a secondary node."""
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285 | a1f445d3 | Iustin Pop | return self.dev_type in (constants.LD_DRBD7, constants.LD_DRBD8, |
286 | a1f445d3 | Iustin Pop | constants.LD_LV) |
287 | a8083063 | Iustin Pop | |
288 | a8083063 | Iustin Pop | def OpenOnSecondary(self): |
289 | a8083063 | Iustin Pop | """Test if this device needs to be opened on a secondary node."""
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290 | fe96220b | Iustin Pop | return self.dev_type in (constants.LD_LV,) |
291 | a8083063 | Iustin Pop | |
292 | 222f2dd5 | Iustin Pop | def StaticDevPath(self): |
293 | 222f2dd5 | Iustin Pop | """Return the device path if this device type has a static one.
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294 | 222f2dd5 | Iustin Pop |
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295 | 222f2dd5 | Iustin Pop | Some devices (LVM for example) live always at the same /dev/ path,
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296 | 222f2dd5 | Iustin Pop | irrespective of their status. For such devices, we return this
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297 | 222f2dd5 | Iustin Pop | path, for others we return None.
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298 | 222f2dd5 | Iustin Pop |
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299 | 222f2dd5 | Iustin Pop | """
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300 | 222f2dd5 | Iustin Pop | if self.dev_type == constants.LD_LV: |
301 | 222f2dd5 | Iustin Pop | return "/dev/%s/%s" % (self.logical_id[0], self.logical_id[1]) |
302 | 222f2dd5 | Iustin Pop | return None |
303 | 222f2dd5 | Iustin Pop | |
304 | fc1dc9d7 | Iustin Pop | def ChildrenNeeded(self): |
305 | fc1dc9d7 | Iustin Pop | """Compute the needed number of children for activation.
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306 | fc1dc9d7 | Iustin Pop |
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307 | fc1dc9d7 | Iustin Pop | This method will return either -1 (all children) or a positive
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308 | fc1dc9d7 | Iustin Pop | number denoting the minimum number of children needed for
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309 | fc1dc9d7 | Iustin Pop | activation (only mirrored devices will usually return >=0).
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310 | fc1dc9d7 | Iustin Pop |
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311 | fc1dc9d7 | Iustin Pop | Currently, only DRBD8 supports diskless activation (therefore we
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312 | fc1dc9d7 | Iustin Pop | return 0), for all other we keep the previous semantics and return
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313 | fc1dc9d7 | Iustin Pop | -1.
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314 | fc1dc9d7 | Iustin Pop |
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315 | fc1dc9d7 | Iustin Pop | """
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316 | fc1dc9d7 | Iustin Pop | if self.dev_type == constants.LD_DRBD8: |
317 | fc1dc9d7 | Iustin Pop | return 0 |
318 | fc1dc9d7 | Iustin Pop | return -1 |
319 | fc1dc9d7 | Iustin Pop | |
320 | a8083063 | Iustin Pop | def GetNodes(self, node): |
321 | a8083063 | Iustin Pop | """This function returns the nodes this device lives on.
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322 | a8083063 | Iustin Pop |
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323 | a8083063 | Iustin Pop | Given the node on which the parent of the device lives on (or, in
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324 | a8083063 | Iustin Pop | case of a top-level device, the primary node of the devices'
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325 | a8083063 | Iustin Pop | instance), this function will return a list of nodes on which this
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326 | a8083063 | Iustin Pop | devices needs to (or can) be assembled.
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327 | a8083063 | Iustin Pop |
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328 | a8083063 | Iustin Pop | """
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329 | 3f752d97 | Manuel Franceschini | if self.dev_type in [constants.LD_LV, constants.LD_MD_R1, |
330 | 3f752d97 | Manuel Franceschini | constants.LD_FILE]: |
331 | a8083063 | Iustin Pop | result = [node] |
332 | a1f445d3 | Iustin Pop | elif self.dev_type in constants.LDS_DRBD: |
333 | a8083063 | Iustin Pop | result = [self.logical_id[0], self.logical_id[1]] |
334 | a8083063 | Iustin Pop | if node not in result: |
335 | 3ecf6786 | Iustin Pop | raise errors.ConfigurationError("DRBD device passed unknown node") |
336 | a8083063 | Iustin Pop | else:
|
337 | 3ecf6786 | Iustin Pop | raise errors.ProgrammerError("Unhandled device type %s" % self.dev_type) |
338 | a8083063 | Iustin Pop | return result
|
339 | a8083063 | Iustin Pop | |
340 | a8083063 | Iustin Pop | def ComputeNodeTree(self, parent_node): |
341 | a8083063 | Iustin Pop | """Compute the node/disk tree for this disk and its children.
|
342 | a8083063 | Iustin Pop |
|
343 | a8083063 | Iustin Pop | This method, given the node on which the parent disk lives, will
|
344 | a8083063 | Iustin Pop | return the list of all (node, disk) pairs which describe the disk
|
345 | a8083063 | Iustin Pop | tree in the most compact way. For example, a md/drbd/lvm stack
|
346 | a8083063 | Iustin Pop | will be returned as (primary_node, md) and (secondary_node, drbd)
|
347 | a8083063 | Iustin Pop | which represents all the top-level devices on the nodes. This
|
348 | a8083063 | Iustin Pop | means that on the primary node we need to activate the the md (and
|
349 | a8083063 | Iustin Pop | recursively all its children) and on the secondary node we need to
|
350 | a8083063 | Iustin Pop | activate the drbd device (and its children, the two lvm volumes).
|
351 | a8083063 | Iustin Pop |
|
352 | a8083063 | Iustin Pop | """
|
353 | a8083063 | Iustin Pop | my_nodes = self.GetNodes(parent_node)
|
354 | a8083063 | Iustin Pop | result = [(node, self) for node in my_nodes] |
355 | a8083063 | Iustin Pop | if not self.children: |
356 | a8083063 | Iustin Pop | # leaf device
|
357 | a8083063 | Iustin Pop | return result
|
358 | a8083063 | Iustin Pop | for node in my_nodes: |
359 | a8083063 | Iustin Pop | for child in self.children: |
360 | a8083063 | Iustin Pop | child_result = child.ComputeNodeTree(node) |
361 | a8083063 | Iustin Pop | if len(child_result) == 1: |
362 | a8083063 | Iustin Pop | # child (and all its descendants) is simple, doesn't split
|
363 | a8083063 | Iustin Pop | # over multiple hosts, so we don't need to describe it, our
|
364 | a8083063 | Iustin Pop | # own entry for this node describes it completely
|
365 | a8083063 | Iustin Pop | continue
|
366 | a8083063 | Iustin Pop | else:
|
367 | a8083063 | Iustin Pop | # check if child nodes differ from my nodes; note that
|
368 | a8083063 | Iustin Pop | # subdisk can differ from the child itself, and be instead
|
369 | a8083063 | Iustin Pop | # one of its descendants
|
370 | a8083063 | Iustin Pop | for subnode, subdisk in child_result: |
371 | a8083063 | Iustin Pop | if subnode not in my_nodes: |
372 | a8083063 | Iustin Pop | result.append((subnode, subdisk)) |
373 | a8083063 | Iustin Pop | # otherwise child is under our own node, so we ignore this
|
374 | a8083063 | Iustin Pop | # entry (but probably the other results in the list will
|
375 | a8083063 | Iustin Pop | # be different)
|
376 | a8083063 | Iustin Pop | return result
|
377 | a8083063 | Iustin Pop | |
378 | ff9c047c | Iustin Pop | def ToDict(self): |
379 | ff9c047c | Iustin Pop | """Disk-specific conversion to standard python types.
|
380 | ff9c047c | Iustin Pop |
|
381 | ff9c047c | Iustin Pop | This replaces the children lists of objects with lists of
|
382 | ff9c047c | Iustin Pop | standard python types.
|
383 | ff9c047c | Iustin Pop |
|
384 | ff9c047c | Iustin Pop | """
|
385 | ff9c047c | Iustin Pop | bo = super(Disk, self).ToDict() |
386 | ff9c047c | Iustin Pop | |
387 | ff9c047c | Iustin Pop | for attr in ("children",): |
388 | ff9c047c | Iustin Pop | alist = bo.get(attr, None)
|
389 | ff9c047c | Iustin Pop | if alist:
|
390 | ff9c047c | Iustin Pop | bo[attr] = self._ContainerToDicts(alist)
|
391 | ff9c047c | Iustin Pop | return bo
|
392 | ff9c047c | Iustin Pop | |
393 | ff9c047c | Iustin Pop | @classmethod
|
394 | ff9c047c | Iustin Pop | def FromDict(cls, val): |
395 | ff9c047c | Iustin Pop | """Custom function for Disks
|
396 | ff9c047c | Iustin Pop |
|
397 | ff9c047c | Iustin Pop | """
|
398 | ff9c047c | Iustin Pop | obj = super(Disk, cls).FromDict(val)
|
399 | ff9c047c | Iustin Pop | if obj.children:
|
400 | ff9c047c | Iustin Pop | obj.children = cls._ContainerFromDicts(obj.children, list, Disk)
|
401 | ff9c047c | Iustin Pop | if obj.logical_id and isinstance(obj.logical_id, list): |
402 | ff9c047c | Iustin Pop | obj.logical_id = tuple(obj.logical_id)
|
403 | ff9c047c | Iustin Pop | if obj.physical_id and isinstance(obj.physical_id, list): |
404 | ff9c047c | Iustin Pop | obj.physical_id = tuple(obj.physical_id)
|
405 | ff9c047c | Iustin Pop | return obj
|
406 | ff9c047c | Iustin Pop | |
407 | 65a15336 | Iustin Pop | def __str__(self): |
408 | 65a15336 | Iustin Pop | """Custom str() formatter for disks.
|
409 | 65a15336 | Iustin Pop |
|
410 | 65a15336 | Iustin Pop | """
|
411 | 65a15336 | Iustin Pop | if self.dev_type == constants.LD_LV: |
412 | 65a15336 | Iustin Pop | val = "<LogicalVolume(/dev/%s/%s" % self.logical_id |
413 | 65a15336 | Iustin Pop | elif self.dev_type in constants.LDS_DRBD: |
414 | 65a15336 | Iustin Pop | if self.dev_type == constants.LD_DRBD7: |
415 | 65a15336 | Iustin Pop | val = "<DRBD7("
|
416 | 65a15336 | Iustin Pop | else:
|
417 | 65a15336 | Iustin Pop | val = "<DRBD8("
|
418 | 073ca59e | Iustin Pop | if self.physical_id is None: |
419 | 073ca59e | Iustin Pop | phy = "unconfigured"
|
420 | 073ca59e | Iustin Pop | else:
|
421 | 073ca59e | Iustin Pop | phy = ("configured as %s:%s %s:%s" %
|
422 | 25a915d0 | Iustin Pop | (self.physical_id[0], self.physical_id[1], |
423 | 25a915d0 | Iustin Pop | self.physical_id[2], self.physical_id[3])) |
424 | 073ca59e | Iustin Pop | |
425 | 073ca59e | Iustin Pop | val += ("hosts=%s-%s, port=%s, %s, " %
|
426 | 073ca59e | Iustin Pop | (self.logical_id[0], self.logical_id[1], self.logical_id[2], |
427 | 073ca59e | Iustin Pop | phy)) |
428 | 65a15336 | Iustin Pop | if self.children and self.children.count(None) == 0: |
429 | 65a15336 | Iustin Pop | val += "backend=%s, metadev=%s" % (self.children[0], self.children[1]) |
430 | 65a15336 | Iustin Pop | else:
|
431 | 65a15336 | Iustin Pop | val += "no local storage"
|
432 | 65a15336 | Iustin Pop | elif self.dev_type == constants.LD_MD_R1: |
433 | 65a15336 | Iustin Pop | val = "<MD_R1(uuid=%s, children=%s" % (self.physical_id, self.children) |
434 | 65a15336 | Iustin Pop | else:
|
435 | 65a15336 | Iustin Pop | val = ("<Disk(type=%s, logical_id=%s, physical_id=%s, children=%s" %
|
436 | 65a15336 | Iustin Pop | (self.dev_type, self.logical_id, self.physical_id, self.children)) |
437 | 65a15336 | Iustin Pop | if self.iv_name is None: |
438 | 65a15336 | Iustin Pop | val += ", not visible"
|
439 | 65a15336 | Iustin Pop | else:
|
440 | 65a15336 | Iustin Pop | val += ", visible as /dev/%s" % self.iv_name |
441 | 65a15336 | Iustin Pop | val += ", size=%dm)>" % self.size |
442 | 65a15336 | Iustin Pop | return val
|
443 | 65a15336 | Iustin Pop | |
444 | a8083063 | Iustin Pop | |
445 | ec29fe40 | Iustin Pop | class Instance(TaggableObject): |
446 | a8083063 | Iustin Pop | """Config object representing an instance."""
|
447 | ec29fe40 | Iustin Pop | __slots__ = TaggableObject.__slots__ + [ |
448 | a8083063 | Iustin Pop | "name",
|
449 | a8083063 | Iustin Pop | "primary_node",
|
450 | a8083063 | Iustin Pop | "os",
|
451 | a8083063 | Iustin Pop | "status",
|
452 | a8083063 | Iustin Pop | "memory",
|
453 | a8083063 | Iustin Pop | "vcpus",
|
454 | a8083063 | Iustin Pop | "nics",
|
455 | a8083063 | Iustin Pop | "disks",
|
456 | a8083063 | Iustin Pop | "disk_template",
|
457 | 58acb49d | Alexander Schreiber | "network_port",
|
458 | 2d8c9c2e | Iustin Pop | "kernel_path",
|
459 | 2d8c9c2e | Iustin Pop | "initrd_path",
|
460 | 0d9c53bc | Alexander Schreiber | "hvm_boot_order",
|
461 | ddd9bc04 | Iustin Pop | "hvm_acpi",
|
462 | ddd9bc04 | Iustin Pop | "hvm_pae",
|
463 | ddd9bc04 | Iustin Pop | "hvm_cdrom_image_path",
|
464 | ddd9bc04 | Iustin Pop | "vnc_bind_address",
|
465 | a8083063 | Iustin Pop | ] |
466 | a8083063 | Iustin Pop | |
467 | a8083063 | Iustin Pop | def _ComputeSecondaryNodes(self): |
468 | a8083063 | Iustin Pop | """Compute the list of secondary nodes.
|
469 | a8083063 | Iustin Pop |
|
470 | a8083063 | Iustin Pop | Since the data is already there (in the drbd disks), keeping it as
|
471 | a8083063 | Iustin Pop | a separate normal attribute is redundant and if not properly
|
472 | a8083063 | Iustin Pop | synchronised can cause problems. Thus it's better to compute it
|
473 | a8083063 | Iustin Pop | dynamically.
|
474 | a8083063 | Iustin Pop |
|
475 | a8083063 | Iustin Pop | """
|
476 | a8083063 | Iustin Pop | def _Helper(primary, sec_nodes, device): |
477 | a8083063 | Iustin Pop | """Recursively computes secondary nodes given a top device."""
|
478 | a1f445d3 | Iustin Pop | if device.dev_type in constants.LDS_DRBD: |
479 | a8083063 | Iustin Pop | nodea, nodeb, dummy = device.logical_id |
480 | a8083063 | Iustin Pop | if nodea == primary:
|
481 | a8083063 | Iustin Pop | candidate = nodeb |
482 | a8083063 | Iustin Pop | else:
|
483 | a8083063 | Iustin Pop | candidate = nodea |
484 | a8083063 | Iustin Pop | if candidate not in sec_nodes: |
485 | a8083063 | Iustin Pop | sec_nodes.append(candidate) |
486 | a8083063 | Iustin Pop | if device.children:
|
487 | a8083063 | Iustin Pop | for child in device.children: |
488 | a8083063 | Iustin Pop | _Helper(primary, sec_nodes, child) |
489 | a8083063 | Iustin Pop | |
490 | a8083063 | Iustin Pop | secondary_nodes = [] |
491 | a8083063 | Iustin Pop | for device in self.disks: |
492 | a8083063 | Iustin Pop | _Helper(self.primary_node, secondary_nodes, device)
|
493 | a8083063 | Iustin Pop | return tuple(secondary_nodes) |
494 | a8083063 | Iustin Pop | |
495 | a8083063 | Iustin Pop | secondary_nodes = property(_ComputeSecondaryNodes, None, None, |
496 | a8083063 | Iustin Pop | "List of secondary nodes")
|
497 | a8083063 | Iustin Pop | |
498 | a8083063 | Iustin Pop | def MapLVsByNode(self, lvmap=None, devs=None, node=None): |
499 | a8083063 | Iustin Pop | """Provide a mapping of nodes to LVs this instance owns.
|
500 | a8083063 | Iustin Pop |
|
501 | a8083063 | Iustin Pop | This function figures out what logical volumes should belong on which
|
502 | a8083063 | Iustin Pop | nodes, recursing through a device tree.
|
503 | a8083063 | Iustin Pop |
|
504 | a8083063 | Iustin Pop | Args:
|
505 | a8083063 | Iustin Pop | lvmap: (optional) a dictionary to receive the 'node' : ['lv', ...] data.
|
506 | a8083063 | Iustin Pop |
|
507 | a8083063 | Iustin Pop | Returns:
|
508 | a8083063 | Iustin Pop | None if lvmap arg is given.
|
509 | a8083063 | Iustin Pop | Otherwise, { 'nodename' : ['volume1', 'volume2', ...], ... }
|
510 | a8083063 | Iustin Pop |
|
511 | a8083063 | Iustin Pop | """
|
512 | a8083063 | Iustin Pop | if node == None: |
513 | a8083063 | Iustin Pop | node = self.primary_node
|
514 | a8083063 | Iustin Pop | |
515 | a8083063 | Iustin Pop | if lvmap is None: |
516 | a8083063 | Iustin Pop | lvmap = { node : [] } |
517 | a8083063 | Iustin Pop | ret = lvmap |
518 | a8083063 | Iustin Pop | else:
|
519 | a8083063 | Iustin Pop | if not node in lvmap: |
520 | a8083063 | Iustin Pop | lvmap[node] = [] |
521 | a8083063 | Iustin Pop | ret = None
|
522 | a8083063 | Iustin Pop | |
523 | a8083063 | Iustin Pop | if not devs: |
524 | a8083063 | Iustin Pop | devs = self.disks
|
525 | a8083063 | Iustin Pop | |
526 | a8083063 | Iustin Pop | for dev in devs: |
527 | fe96220b | Iustin Pop | if dev.dev_type == constants.LD_LV:
|
528 | a8083063 | Iustin Pop | lvmap[node].append(dev.logical_id[1])
|
529 | a8083063 | Iustin Pop | |
530 | a1f445d3 | Iustin Pop | elif dev.dev_type in constants.LDS_DRBD: |
531 | a8083063 | Iustin Pop | if dev.logical_id[0] not in lvmap: |
532 | a8083063 | Iustin Pop | lvmap[dev.logical_id[0]] = []
|
533 | a8083063 | Iustin Pop | |
534 | a8083063 | Iustin Pop | if dev.logical_id[1] not in lvmap: |
535 | a8083063 | Iustin Pop | lvmap[dev.logical_id[1]] = []
|
536 | a8083063 | Iustin Pop | |
537 | a8083063 | Iustin Pop | if dev.children:
|
538 | a8083063 | Iustin Pop | self.MapLVsByNode(lvmap, dev.children, dev.logical_id[0]) |
539 | a8083063 | Iustin Pop | self.MapLVsByNode(lvmap, dev.children, dev.logical_id[1]) |
540 | a8083063 | Iustin Pop | |
541 | a8083063 | Iustin Pop | elif dev.children:
|
542 | a8083063 | Iustin Pop | self.MapLVsByNode(lvmap, dev.children, node)
|
543 | a8083063 | Iustin Pop | |
544 | a8083063 | Iustin Pop | return ret
|
545 | a8083063 | Iustin Pop | |
546 | 644eeef9 | Iustin Pop | def FindDisk(self, name): |
547 | 644eeef9 | Iustin Pop | """Find a disk given having a specified name.
|
548 | 644eeef9 | Iustin Pop |
|
549 | 644eeef9 | Iustin Pop | This will return the disk which has the given iv_name.
|
550 | 644eeef9 | Iustin Pop |
|
551 | 644eeef9 | Iustin Pop | """
|
552 | 644eeef9 | Iustin Pop | for disk in self.disks: |
553 | 644eeef9 | Iustin Pop | if disk.iv_name == name:
|
554 | 644eeef9 | Iustin Pop | return disk
|
555 | 644eeef9 | Iustin Pop | |
556 | 644eeef9 | Iustin Pop | return None |
557 | 644eeef9 | Iustin Pop | |
558 | ff9c047c | Iustin Pop | def ToDict(self): |
559 | ff9c047c | Iustin Pop | """Instance-specific conversion to standard python types.
|
560 | ff9c047c | Iustin Pop |
|
561 | ff9c047c | Iustin Pop | This replaces the children lists of objects with lists of standard
|
562 | ff9c047c | Iustin Pop | python types.
|
563 | ff9c047c | Iustin Pop |
|
564 | ff9c047c | Iustin Pop | """
|
565 | ff9c047c | Iustin Pop | bo = super(Instance, self).ToDict() |
566 | ff9c047c | Iustin Pop | |
567 | ff9c047c | Iustin Pop | for attr in "nics", "disks": |
568 | ff9c047c | Iustin Pop | alist = bo.get(attr, None)
|
569 | ff9c047c | Iustin Pop | if alist:
|
570 | ff9c047c | Iustin Pop | nlist = self._ContainerToDicts(alist)
|
571 | ff9c047c | Iustin Pop | else:
|
572 | ff9c047c | Iustin Pop | nlist = [] |
573 | ff9c047c | Iustin Pop | bo[attr] = nlist |
574 | ff9c047c | Iustin Pop | return bo
|
575 | ff9c047c | Iustin Pop | |
576 | ff9c047c | Iustin Pop | @classmethod
|
577 | ff9c047c | Iustin Pop | def FromDict(cls, val): |
578 | ff9c047c | Iustin Pop | """Custom function for instances.
|
579 | ff9c047c | Iustin Pop |
|
580 | ff9c047c | Iustin Pop | """
|
581 | ff9c047c | Iustin Pop | obj = super(Instance, cls).FromDict(val)
|
582 | ff9c047c | Iustin Pop | obj.nics = cls._ContainerFromDicts(obj.nics, list, NIC)
|
583 | ff9c047c | Iustin Pop | obj.disks = cls._ContainerFromDicts(obj.disks, list, Disk)
|
584 | ff9c047c | Iustin Pop | return obj
|
585 | ff9c047c | Iustin Pop | |
586 | a8083063 | Iustin Pop | |
587 | a8083063 | Iustin Pop | class OS(ConfigObject): |
588 | a8083063 | Iustin Pop | """Config object representing an operating system."""
|
589 | a8083063 | Iustin Pop | __slots__ = [ |
590 | a8083063 | Iustin Pop | "name",
|
591 | a8083063 | Iustin Pop | "path",
|
592 | 37482e7b | Guido Trotter | "status",
|
593 | a8083063 | Iustin Pop | "api_version",
|
594 | a8083063 | Iustin Pop | "create_script",
|
595 | a8083063 | Iustin Pop | "export_script",
|
596 | 386b57af | Iustin Pop | "import_script",
|
597 | 386b57af | Iustin Pop | "rename_script",
|
598 | a8083063 | Iustin Pop | ] |
599 | a8083063 | Iustin Pop | |
600 | d2c807e4 | Guido Trotter | @classmethod
|
601 | d2c807e4 | Guido Trotter | def FromInvalidOS(cls, err): |
602 | d2c807e4 | Guido Trotter | """Create an OS from an InvalidOS error.
|
603 | d2c807e4 | Guido Trotter |
|
604 | d2c807e4 | Guido Trotter | This routine knows how to convert an InvalidOS error to an OS
|
605 | d2c807e4 | Guido Trotter | object representing the broken OS with a meaningful error message.
|
606 | d2c807e4 | Guido Trotter |
|
607 | d2c807e4 | Guido Trotter | """
|
608 | d2c807e4 | Guido Trotter | if not isinstance(err, errors.InvalidOS): |
609 | d2c807e4 | Guido Trotter | raise errors.ProgrammerError("Trying to initialize an OS from an" |
610 | d2c807e4 | Guido Trotter | " invalid object of type %s" % type(err)) |
611 | d2c807e4 | Guido Trotter | |
612 | d2c807e4 | Guido Trotter | return cls(name=err.args[0], path=err.args[1], status=err.args[2]) |
613 | d2c807e4 | Guido Trotter | |
614 | 37482e7b | Guido Trotter | def __nonzero__(self): |
615 | 37482e7b | Guido Trotter | return self.status == constants.OS_VALID_STATUS |
616 | 37482e7b | Guido Trotter | |
617 | 37482e7b | Guido Trotter | __bool__ = __nonzero__ |
618 | a8083063 | Iustin Pop | |
619 | 7c0d6283 | Michael Hanselmann | |
620 | ec29fe40 | Iustin Pop | class Node(TaggableObject): |
621 | a8083063 | Iustin Pop | """Config object representing a node."""
|
622 | ec29fe40 | Iustin Pop | __slots__ = TaggableObject.__slots__ + [ |
623 | ec29fe40 | Iustin Pop | "name",
|
624 | ec29fe40 | Iustin Pop | "primary_ip",
|
625 | ec29fe40 | Iustin Pop | "secondary_ip",
|
626 | ec29fe40 | Iustin Pop | ] |
627 | a8083063 | Iustin Pop | |
628 | a8083063 | Iustin Pop | |
629 | ec29fe40 | Iustin Pop | class Cluster(TaggableObject): |
630 | a8083063 | Iustin Pop | """Config object representing the cluster."""
|
631 | ec29fe40 | Iustin Pop | __slots__ = TaggableObject.__slots__ + [ |
632 | a8083063 | Iustin Pop | "config_version",
|
633 | a8083063 | Iustin Pop | "serial_no",
|
634 | a8083063 | Iustin Pop | "rsahostkeypub",
|
635 | a8083063 | Iustin Pop | "highest_used_port",
|
636 | b2fddf63 | Iustin Pop | "tcpudp_port_pool",
|
637 | a8083063 | Iustin Pop | "mac_prefix",
|
638 | a8083063 | Iustin Pop | "volume_group_name",
|
639 | a8083063 | Iustin Pop | "default_bridge",
|
640 | a8083063 | Iustin Pop | ] |
641 | a8083063 | Iustin Pop | |
642 | 319856a9 | Michael Hanselmann | def ToDict(self): |
643 | 319856a9 | Michael Hanselmann | """Custom function for cluster.
|
644 | 319856a9 | Michael Hanselmann |
|
645 | 319856a9 | Michael Hanselmann | """
|
646 | b60ae2ca | Iustin Pop | mydict = super(Cluster, self).ToDict() |
647 | 319856a9 | Michael Hanselmann | mydict["tcpudp_port_pool"] = list(self.tcpudp_port_pool) |
648 | 319856a9 | Michael Hanselmann | return mydict
|
649 | 319856a9 | Michael Hanselmann | |
650 | 319856a9 | Michael Hanselmann | @classmethod
|
651 | 319856a9 | Michael Hanselmann | def FromDict(cls, val): |
652 | 319856a9 | Michael Hanselmann | """Custom function for cluster.
|
653 | 319856a9 | Michael Hanselmann |
|
654 | 319856a9 | Michael Hanselmann | """
|
655 | b60ae2ca | Iustin Pop | obj = super(Cluster, cls).FromDict(val)
|
656 | 319856a9 | Michael Hanselmann | if not isinstance(obj.tcpudp_port_pool, set): |
657 | 319856a9 | Michael Hanselmann | obj.tcpudp_port_pool = set(obj.tcpudp_port_pool)
|
658 | 319856a9 | Michael Hanselmann | return obj
|
659 | 319856a9 | Michael Hanselmann | |
660 | 5c947f38 | Iustin Pop | |
661 | a8083063 | Iustin Pop | class SerializableConfigParser(ConfigParser.SafeConfigParser): |
662 | a8083063 | Iustin Pop | """Simple wrapper over ConfigParse that allows serialization.
|
663 | a8083063 | Iustin Pop |
|
664 | a8083063 | Iustin Pop | This class is basically ConfigParser.SafeConfigParser with two
|
665 | a8083063 | Iustin Pop | additional methods that allow it to serialize/unserialize to/from a
|
666 | a8083063 | Iustin Pop | buffer.
|
667 | a8083063 | Iustin Pop |
|
668 | a8083063 | Iustin Pop | """
|
669 | a8083063 | Iustin Pop | def Dumps(self): |
670 | a8083063 | Iustin Pop | """Dump this instance and return the string representation."""
|
671 | a8083063 | Iustin Pop | buf = StringIO() |
672 | a8083063 | Iustin Pop | self.write(buf)
|
673 | a8083063 | Iustin Pop | return buf.getvalue()
|
674 | a8083063 | Iustin Pop | |
675 | a8083063 | Iustin Pop | @staticmethod
|
676 | a8083063 | Iustin Pop | def Loads(data): |
677 | a8083063 | Iustin Pop | """Load data from a string."""
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678 | a8083063 | Iustin Pop | buf = StringIO(data) |
679 | a8083063 | Iustin Pop | cfp = SerializableConfigParser() |
680 | a8083063 | Iustin Pop | cfp.readfp(buf) |
681 | a8083063 | Iustin Pop | return cfp |