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1 | f12e1736 | René Nussbaumer | #
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2 | f299ca21 | Michael Hanselmann | #
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3 | f12e1736 | René Nussbaumer | |
4 | f12e1736 | René Nussbaumer | # Copyright (C) 2010 Google Inc.
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5 | f12e1736 | René Nussbaumer | #
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6 | f12e1736 | René Nussbaumer | # This program is free software; you can redistribute it and/or modify
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7 | f12e1736 | René Nussbaumer | # it under the terms of the GNU General Public License as published by
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8 | f12e1736 | René Nussbaumer | # the Free Software Foundation; either version 2 of the License, or
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9 | f12e1736 | René Nussbaumer | # (at your option) any later version.
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10 | f12e1736 | René Nussbaumer | #
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11 | f12e1736 | René Nussbaumer | # This program is distributed in the hope that it will be useful, but
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12 | f12e1736 | René Nussbaumer | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | f12e1736 | René Nussbaumer | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | f12e1736 | René Nussbaumer | # General Public License for more details.
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15 | f12e1736 | René Nussbaumer | #
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16 | f12e1736 | René Nussbaumer | # You should have received a copy of the GNU General Public License
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17 | f12e1736 | René Nussbaumer | # along with this program; if not, write to the Free Software
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18 | f12e1736 | René Nussbaumer | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | f12e1736 | René Nussbaumer | # 02110-1301, USA.
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20 | f12e1736 | René Nussbaumer | |
21 | f12e1736 | René Nussbaumer | """Module implementing configuration details at runtime.
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22 | f12e1736 | René Nussbaumer |
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23 | f12e1736 | René Nussbaumer | """
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24 | f12e1736 | René Nussbaumer | |
25 | f12e1736 | René Nussbaumer | |
26 | f12e1736 | René Nussbaumer | import grp |
27 | f12e1736 | René Nussbaumer | import pwd |
28 | f12e1736 | René Nussbaumer | import threading |
29 | a51b19de | Helga Velroyen | import os |
30 | a20e4768 | Michael Hanselmann | import platform |
31 | f12e1736 | René Nussbaumer | |
32 | f12e1736 | René Nussbaumer | from ganeti import constants |
33 | f12e1736 | René Nussbaumer | from ganeti import errors |
34 | a51b19de | Helga Velroyen | from ganeti import luxi |
35 | ff1012ef | Petr Pudlak | from ganeti.rpc.errors import NoMasterError |
36 | a51b19de | Helga Velroyen | from ganeti import pathutils |
37 | a51b19de | Helga Velroyen | from ganeti import ssconf |
38 | 44fbd23b | René Nussbaumer | from ganeti import utils |
39 | f12e1736 | René Nussbaumer | |
40 | f12e1736 | René Nussbaumer | |
41 | f12e1736 | René Nussbaumer | _priv = None
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42 | f12e1736 | René Nussbaumer | _priv_lock = threading.Lock() |
43 | f12e1736 | René Nussbaumer | |
44 | a20e4768 | Michael Hanselmann | #: Architecture information
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45 | a20e4768 | Michael Hanselmann | _arch = None
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46 | a20e4768 | Michael Hanselmann | |
47 | f12e1736 | René Nussbaumer | |
48 | f12e1736 | René Nussbaumer | def GetUid(user, _getpwnam): |
49 | f12e1736 | René Nussbaumer | """Retrieve the uid from the database.
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50 | f12e1736 | René Nussbaumer |
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51 | f12e1736 | René Nussbaumer | @type user: string
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52 | f12e1736 | René Nussbaumer | @param user: The username to retrieve
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53 | f12e1736 | René Nussbaumer | @return: The resolved uid
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54 | f12e1736 | René Nussbaumer |
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55 | f12e1736 | René Nussbaumer | """
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56 | f12e1736 | René Nussbaumer | try:
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57 | f12e1736 | René Nussbaumer | return _getpwnam(user).pw_uid
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58 | f12e1736 | René Nussbaumer | except KeyError, err: |
59 | f12e1736 | René Nussbaumer | raise errors.ConfigurationError("User '%s' not found (%s)" % (user, err)) |
60 | f12e1736 | René Nussbaumer | |
61 | f12e1736 | René Nussbaumer | |
62 | f12e1736 | René Nussbaumer | def GetGid(group, _getgrnam): |
63 | f12e1736 | René Nussbaumer | """Retrieve the gid from the database.
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64 | f12e1736 | René Nussbaumer |
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65 | f12e1736 | René Nussbaumer | @type group: string
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66 | f12e1736 | René Nussbaumer | @param group: The group name to retrieve
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67 | f12e1736 | René Nussbaumer | @return: The resolved gid
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68 | f12e1736 | René Nussbaumer |
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69 | f12e1736 | René Nussbaumer | """
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70 | f12e1736 | René Nussbaumer | try:
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71 | f12e1736 | René Nussbaumer | return _getgrnam(group).gr_gid
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72 | f12e1736 | René Nussbaumer | except KeyError, err: |
73 | f12e1736 | René Nussbaumer | raise errors.ConfigurationError("Group '%s' not found (%s)" % (group, err)) |
74 | f12e1736 | René Nussbaumer | |
75 | f12e1736 | René Nussbaumer | |
76 | f12e1736 | René Nussbaumer | class GetentResolver: |
77 | f12e1736 | René Nussbaumer | """Resolves Ganeti uids and gids by name.
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78 | f12e1736 | René Nussbaumer |
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79 | f12e1736 | René Nussbaumer | @ivar masterd_uid: The resolved uid of the masterd user
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80 | f12e1736 | René Nussbaumer | @ivar masterd_gid: The resolved gid of the masterd group
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81 | f12e1736 | René Nussbaumer | @ivar confd_uid: The resolved uid of the confd user
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82 | f12e1736 | René Nussbaumer | @ivar confd_gid: The resolved gid of the confd group
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83 | 3695a4e0 | Thomas Thrainer | @ivar luxid_uid: The resolved uid of the luxid user
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84 | 3695a4e0 | Thomas Thrainer | @ivar luxid_gid: The resolved gid of the luxid group
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85 | f12e1736 | René Nussbaumer | @ivar rapi_uid: The resolved uid of the rapi user
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86 | f12e1736 | René Nussbaumer | @ivar rapi_gid: The resolved gid of the rapi group
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87 | f12e1736 | René Nussbaumer | @ivar noded_uid: The resolved uid of the noded user
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88 | f12e1736 | René Nussbaumer | @ivar daemons_gid: The resolved gid of the daemons group
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89 | f12e1736 | René Nussbaumer | @ivar admin_gid: The resolved gid of the admin group
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90 | f00170e2 | Michael Hanselmann |
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91 | f12e1736 | René Nussbaumer | """
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92 | f12e1736 | René Nussbaumer | def __init__(self, _getpwnam=pwd.getpwnam, _getgrnam=grp.getgrnam): |
93 | f12e1736 | René Nussbaumer | """Initialize the resolver.
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94 | f12e1736 | René Nussbaumer |
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95 | f12e1736 | René Nussbaumer | """
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96 | f12e1736 | René Nussbaumer | # Daemon pairs
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97 | f12e1736 | René Nussbaumer | self.masterd_uid = GetUid(constants.MASTERD_USER, _getpwnam)
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98 | f12e1736 | René Nussbaumer | self.masterd_gid = GetGid(constants.MASTERD_GROUP, _getgrnam)
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99 | f12e1736 | René Nussbaumer | |
100 | f12e1736 | René Nussbaumer | self.confd_uid = GetUid(constants.CONFD_USER, _getpwnam)
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101 | f12e1736 | René Nussbaumer | self.confd_gid = GetGid(constants.CONFD_GROUP, _getgrnam)
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102 | f12e1736 | René Nussbaumer | |
103 | 3695a4e0 | Thomas Thrainer | self.luxid_uid = GetUid(constants.LUXID_USER, _getpwnam)
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104 | 3695a4e0 | Thomas Thrainer | self.luxid_gid = GetGid(constants.LUXID_GROUP, _getgrnam)
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105 | 670e954a | Thomas Thrainer | |
106 | f12e1736 | René Nussbaumer | self.rapi_uid = GetUid(constants.RAPI_USER, _getpwnam)
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107 | f12e1736 | René Nussbaumer | self.rapi_gid = GetGid(constants.RAPI_GROUP, _getgrnam)
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108 | f12e1736 | René Nussbaumer | |
109 | f12e1736 | René Nussbaumer | self.noded_uid = GetUid(constants.NODED_USER, _getpwnam)
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110 | 44fbd23b | René Nussbaumer | self.noded_gid = GetGid(constants.NODED_GROUP, _getgrnam)
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111 | f12e1736 | René Nussbaumer | |
112 | d08a8359 | Thomas Thrainer | self.mond_uid = GetUid(constants.MOND_USER, _getpwnam)
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113 | d08a8359 | Thomas Thrainer | self.mond_gid = GetGid(constants.MOND_GROUP, _getgrnam)
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114 | d08a8359 | Thomas Thrainer | |
115 | f12e1736 | René Nussbaumer | # Misc Ganeti groups
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116 | f12e1736 | René Nussbaumer | self.daemons_gid = GetGid(constants.DAEMONS_GROUP, _getgrnam)
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117 | f12e1736 | René Nussbaumer | self.admin_gid = GetGid(constants.ADMIN_GROUP, _getgrnam)
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118 | f12e1736 | René Nussbaumer | |
119 | 44fbd23b | René Nussbaumer | self._uid2user = {
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120 | 44fbd23b | René Nussbaumer | self.masterd_uid: constants.MASTERD_USER,
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121 | 44fbd23b | René Nussbaumer | self.confd_uid: constants.CONFD_USER,
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122 | 3695a4e0 | Thomas Thrainer | self.luxid_uid: constants.LUXID_USER,
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123 | 44fbd23b | René Nussbaumer | self.rapi_uid: constants.RAPI_USER,
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124 | 44fbd23b | René Nussbaumer | self.noded_uid: constants.NODED_USER,
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125 | d08a8359 | Thomas Thrainer | self.mond_uid: constants.MOND_USER,
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126 | 44fbd23b | René Nussbaumer | } |
127 | 44fbd23b | René Nussbaumer | |
128 | 44fbd23b | René Nussbaumer | self._gid2group = {
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129 | 44fbd23b | René Nussbaumer | self.masterd_gid: constants.MASTERD_GROUP,
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130 | 44fbd23b | René Nussbaumer | self.confd_gid: constants.CONFD_GROUP,
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131 | 3695a4e0 | Thomas Thrainer | self.luxid_gid: constants.LUXID_GROUP,
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132 | 44fbd23b | René Nussbaumer | self.rapi_gid: constants.RAPI_GROUP,
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133 | 44fbd23b | René Nussbaumer | self.noded_gid: constants.NODED_GROUP,
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134 | d08a8359 | Thomas Thrainer | self.mond_gid: constants.MOND_GROUP,
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135 | 44fbd23b | René Nussbaumer | self.daemons_gid: constants.DAEMONS_GROUP,
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136 | 44fbd23b | René Nussbaumer | self.admin_gid: constants.ADMIN_GROUP,
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137 | 44fbd23b | René Nussbaumer | } |
138 | 44fbd23b | René Nussbaumer | |
139 | 44fbd23b | René Nussbaumer | self._user2uid = utils.InvertDict(self._uid2user) |
140 | 44fbd23b | René Nussbaumer | self._group2gid = utils.InvertDict(self._gid2group) |
141 | 44fbd23b | René Nussbaumer | |
142 | 44fbd23b | René Nussbaumer | def LookupUid(self, uid): |
143 | 44fbd23b | René Nussbaumer | """Looks which Ganeti user belongs to this uid.
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144 | 44fbd23b | René Nussbaumer |
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145 | 44fbd23b | René Nussbaumer | @param uid: The uid to lookup
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146 | 44fbd23b | René Nussbaumer | @returns The user name associated with that uid
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147 | 44fbd23b | René Nussbaumer |
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148 | 44fbd23b | René Nussbaumer | """
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149 | 44fbd23b | René Nussbaumer | try:
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150 | 44fbd23b | René Nussbaumer | return self._uid2user[uid] |
151 | 44fbd23b | René Nussbaumer | except KeyError: |
152 | 44fbd23b | René Nussbaumer | raise errors.ConfigurationError("Unknown Ganeti uid '%d'" % uid) |
153 | 44fbd23b | René Nussbaumer | |
154 | 44fbd23b | René Nussbaumer | def LookupGid(self, gid): |
155 | 44fbd23b | René Nussbaumer | """Looks which Ganeti group belongs to this gid.
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156 | 44fbd23b | René Nussbaumer |
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157 | 44fbd23b | René Nussbaumer | @param gid: The gid to lookup
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158 | 44fbd23b | René Nussbaumer | @returns The group name associated with that gid
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159 | 44fbd23b | René Nussbaumer |
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160 | 44fbd23b | René Nussbaumer | """
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161 | 44fbd23b | René Nussbaumer | try:
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162 | 44fbd23b | René Nussbaumer | return self._gid2group[gid] |
163 | 44fbd23b | René Nussbaumer | except KeyError: |
164 | 44fbd23b | René Nussbaumer | raise errors.ConfigurationError("Unknown Ganeti gid '%d'" % gid) |
165 | 44fbd23b | René Nussbaumer | |
166 | 44fbd23b | René Nussbaumer | def LookupUser(self, name): |
167 | 44fbd23b | René Nussbaumer | """Looks which uid belongs to this name.
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168 | 44fbd23b | René Nussbaumer |
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169 | 44fbd23b | René Nussbaumer | @param name: The name to lookup
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170 | 44fbd23b | René Nussbaumer | @returns The uid associated with that user name
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171 | 44fbd23b | René Nussbaumer |
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172 | 44fbd23b | René Nussbaumer | """
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173 | 44fbd23b | René Nussbaumer | try:
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174 | 44fbd23b | René Nussbaumer | return self._user2uid[name] |
175 | 44fbd23b | René Nussbaumer | except KeyError: |
176 | 44fbd23b | René Nussbaumer | raise errors.ConfigurationError("Unknown Ganeti user '%s'" % name) |
177 | 44fbd23b | René Nussbaumer | |
178 | 44fbd23b | René Nussbaumer | def LookupGroup(self, name): |
179 | 44fbd23b | René Nussbaumer | """Looks which gid belongs to this name.
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180 | 44fbd23b | René Nussbaumer |
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181 | 44fbd23b | René Nussbaumer | @param name: The name to lookup
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182 | 44fbd23b | René Nussbaumer | @returns The gid associated with that group name
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183 | 44fbd23b | René Nussbaumer |
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184 | 44fbd23b | René Nussbaumer | """
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185 | 44fbd23b | René Nussbaumer | try:
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186 | 44fbd23b | René Nussbaumer | return self._group2gid[name] |
187 | 44fbd23b | René Nussbaumer | except KeyError: |
188 | 44fbd23b | René Nussbaumer | raise errors.ConfigurationError("Unknown Ganeti group '%s'" % name) |
189 | 44fbd23b | René Nussbaumer | |
190 | f12e1736 | René Nussbaumer | |
191 | f12e1736 | René Nussbaumer | def GetEnts(resolver=GetentResolver): |
192 | f12e1736 | René Nussbaumer | """Singleton wrapper around resolver instance.
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193 | f12e1736 | René Nussbaumer |
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194 | f12e1736 | René Nussbaumer | As this method is accessed by multiple threads at the same time
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195 | 1fdfa87a | Iustin Pop | we need to take thread-safety carefully.
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196 | f12e1736 | René Nussbaumer |
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197 | f12e1736 | René Nussbaumer | """
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198 | f12e1736 | René Nussbaumer | # We need to use the global keyword here
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199 | b459a848 | Andrea Spadaccini | global _priv # pylint: disable=W0603 |
200 | f12e1736 | René Nussbaumer | |
201 | f12e1736 | René Nussbaumer | if not _priv: |
202 | f12e1736 | René Nussbaumer | _priv_lock.acquire() |
203 | f12e1736 | René Nussbaumer | try:
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204 | f12e1736 | René Nussbaumer | if not _priv: |
205 | f12e1736 | René Nussbaumer | # W0621: Redefine '_priv' from outer scope (used for singleton)
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206 | b459a848 | Andrea Spadaccini | _priv = resolver() # pylint: disable=W0621
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207 | f12e1736 | René Nussbaumer | finally:
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208 | f12e1736 | René Nussbaumer | _priv_lock.release() |
209 | f12e1736 | René Nussbaumer | |
210 | f12e1736 | René Nussbaumer | return _priv
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211 | a20e4768 | Michael Hanselmann | |
212 | a20e4768 | Michael Hanselmann | |
213 | a20e4768 | Michael Hanselmann | def InitArchInfo(): |
214 | a20e4768 | Michael Hanselmann | """Initialize architecture information.
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215 | a20e4768 | Michael Hanselmann |
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216 | a20e4768 | Michael Hanselmann | We can assume this information never changes during the lifetime of a
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217 | a20e4768 | Michael Hanselmann | process, therefore the information can easily be cached.
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218 | a20e4768 | Michael Hanselmann |
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219 | a20e4768 | Michael Hanselmann | @note: This function uses C{platform.architecture} to retrieve the Python
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220 | a20e4768 | Michael Hanselmann | binary architecture and does so by forking to run C{file} (see Python
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221 | a20e4768 | Michael Hanselmann | documentation for more information). Therefore it must not be used in a
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222 | a20e4768 | Michael Hanselmann | multi-threaded environment.
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223 | a20e4768 | Michael Hanselmann |
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224 | a20e4768 | Michael Hanselmann | """
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225 | a20e4768 | Michael Hanselmann | global _arch # pylint: disable=W0603 |
226 | a20e4768 | Michael Hanselmann | |
227 | a20e4768 | Michael Hanselmann | if _arch is not None: |
228 | a20e4768 | Michael Hanselmann | raise errors.ProgrammerError("Architecture information can only be" |
229 | a20e4768 | Michael Hanselmann | " initialized once")
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230 | a20e4768 | Michael Hanselmann | |
231 | a20e4768 | Michael Hanselmann | _arch = (platform.architecture()[0], platform.machine())
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232 | a20e4768 | Michael Hanselmann | |
233 | a20e4768 | Michael Hanselmann | |
234 | a20e4768 | Michael Hanselmann | def GetArchInfo(): |
235 | a20e4768 | Michael Hanselmann | """Returns previsouly initialized architecture information.
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236 | a20e4768 | Michael Hanselmann |
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237 | a20e4768 | Michael Hanselmann | """
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238 | a20e4768 | Michael Hanselmann | if _arch is None: |
239 | a20e4768 | Michael Hanselmann | raise errors.ProgrammerError("Architecture information hasn't been" |
240 | a20e4768 | Michael Hanselmann | " initialized")
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241 | a20e4768 | Michael Hanselmann | |
242 | a20e4768 | Michael Hanselmann | return _arch
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243 | a51b19de | Helga Velroyen | |
244 | a51b19de | Helga Velroyen | |
245 | d75d7772 | Klaus Aehlig | def GetClient(query=True): |
246 | a51b19de | Helga Velroyen | """Connects to the a luxi socket and returns a client.
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247 | a51b19de | Helga Velroyen |
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248 | a51b19de | Helga Velroyen | @type query: boolean
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249 | a51b19de | Helga Velroyen | @param query: this signifies that the client will only be
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250 | a51b19de | Helga Velroyen | used for queries; if the build-time parameter
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251 | a51b19de | Helga Velroyen | enable-split-queries is enabled, then the client will be
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252 | a51b19de | Helga Velroyen | connected to the query socket instead of the masterd socket
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253 | a51b19de | Helga Velroyen |
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254 | a51b19de | Helga Velroyen | """
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255 | a51b19de | Helga Velroyen | override_socket = os.getenv(constants.LUXI_OVERRIDE, "")
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256 | a51b19de | Helga Velroyen | if override_socket:
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257 | a51b19de | Helga Velroyen | if override_socket == constants.LUXI_OVERRIDE_MASTER:
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258 | a51b19de | Helga Velroyen | address = pathutils.MASTER_SOCKET |
259 | a51b19de | Helga Velroyen | elif override_socket == constants.LUXI_OVERRIDE_QUERY:
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260 | a51b19de | Helga Velroyen | address = pathutils.QUERY_SOCKET |
261 | a51b19de | Helga Velroyen | else:
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262 | a51b19de | Helga Velroyen | address = override_socket |
263 | a51b19de | Helga Velroyen | elif query:
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264 | a51b19de | Helga Velroyen | address = pathutils.QUERY_SOCKET |
265 | a51b19de | Helga Velroyen | else:
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266 | a51b19de | Helga Velroyen | address = None
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267 | a51b19de | Helga Velroyen | # TODO: Cache object?
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268 | a51b19de | Helga Velroyen | try:
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269 | a51b19de | Helga Velroyen | client = luxi.Client(address=address) |
270 | ff1012ef | Petr Pudlak | except NoMasterError:
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271 | a51b19de | Helga Velroyen | ss = ssconf.SimpleStore() |
272 | a51b19de | Helga Velroyen | |
273 | a51b19de | Helga Velroyen | # Try to read ssconf file
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274 | a51b19de | Helga Velroyen | try:
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275 | a51b19de | Helga Velroyen | ss.GetMasterNode() |
276 | a51b19de | Helga Velroyen | except errors.ConfigurationError:
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277 | a51b19de | Helga Velroyen | raise errors.OpPrereqError("Cluster not initialized or this machine is" |
278 | a51b19de | Helga Velroyen | " not part of a cluster",
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279 | a51b19de | Helga Velroyen | errors.ECODE_INVAL) |
280 | a51b19de | Helga Velroyen | |
281 | a51b19de | Helga Velroyen | master, myself = ssconf.GetMasterAndMyself(ss=ss) |
282 | a51b19de | Helga Velroyen | if master != myself:
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283 | a51b19de | Helga Velroyen | raise errors.OpPrereqError("This is not the master node, please connect" |
284 | a51b19de | Helga Velroyen | " to node '%s' and rerun the command" %
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285 | a51b19de | Helga Velroyen | master, errors.ECODE_INVAL) |
286 | a51b19de | Helga Velroyen | raise
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287 | a51b19de | Helga Velroyen | return client |