root / lib / confd / querylib.py @ 23824641
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1 | d73ef63f | Michael Hanselmann | #
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2 | e16e4824 | Guido Trotter | #
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3 | e16e4824 | Guido Trotter | |
4 | e16e4824 | Guido Trotter | # Copyright (C) 2009, Google Inc.
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5 | e16e4824 | Guido Trotter | #
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6 | e16e4824 | Guido Trotter | # This program is free software; you can redistribute it and/or modify
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7 | e16e4824 | Guido Trotter | # it under the terms of the GNU General Public License as published by
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8 | e16e4824 | Guido Trotter | # the Free Software Foundation; either version 2 of the License, or
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9 | e16e4824 | Guido Trotter | # (at your option) any later version.
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10 | e16e4824 | Guido Trotter | #
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11 | e16e4824 | Guido Trotter | # This program is distributed in the hope that it will be useful, but
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12 | e16e4824 | Guido Trotter | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | e16e4824 | Guido Trotter | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | e16e4824 | Guido Trotter | # General Public License for more details.
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15 | e16e4824 | Guido Trotter | #
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16 | e16e4824 | Guido Trotter | # You should have received a copy of the GNU General Public License
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17 | e16e4824 | Guido Trotter | # along with this program; if not, write to the Free Software
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18 | e16e4824 | Guido Trotter | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | e16e4824 | Guido Trotter | # 02110-1301, USA.
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20 | e16e4824 | Guido Trotter | |
21 | e16e4824 | Guido Trotter | |
22 | e16e4824 | Guido Trotter | """Ganeti configuration daemon queries library.
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23 | e16e4824 | Guido Trotter |
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24 | e16e4824 | Guido Trotter | """
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25 | e16e4824 | Guido Trotter | |
26 | 53bd7366 | Guido Trotter | import logging |
27 | 53bd7366 | Guido Trotter | |
28 | e16e4824 | Guido Trotter | from ganeti import constants |
29 | e16e4824 | Guido Trotter | |
30 | d73ef63f | Michael Hanselmann | |
31 | 7189e790 | Guido Trotter | # constants for some common errors to return from a query
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32 | 7189e790 | Guido Trotter | QUERY_UNKNOWN_ENTRY_ERROR = (constants.CONFD_REPL_STATUS_ERROR, |
33 | 7189e790 | Guido Trotter | constants.CONFD_ERROR_UNKNOWN_ENTRY) |
34 | 7189e790 | Guido Trotter | QUERY_INTERNAL_ERROR = (constants.CONFD_REPL_STATUS_ERROR, |
35 | 7189e790 | Guido Trotter | constants.CONFD_ERROR_INTERNAL) |
36 | e16e4824 | Guido Trotter | |
37 | d73ef63f | Michael Hanselmann | |
38 | e16e4824 | Guido Trotter | class ConfdQuery(object): |
39 | e16e4824 | Guido Trotter | """Confd Query base class.
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40 | e16e4824 | Guido Trotter |
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41 | e16e4824 | Guido Trotter | """
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42 | e16e4824 | Guido Trotter | def __init__(self, reader): |
43 | e16e4824 | Guido Trotter | """Constructor for Confd Query
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44 | e16e4824 | Guido Trotter |
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45 | e16e4824 | Guido Trotter | @type reader: L{ssconf.SimpleConfigReader}
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46 | e16e4824 | Guido Trotter | @param reader: ConfigReader to use to access the config
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47 | e16e4824 | Guido Trotter |
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48 | e16e4824 | Guido Trotter | """
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49 | e16e4824 | Guido Trotter | self.reader = reader
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50 | e16e4824 | Guido Trotter | |
51 | e16e4824 | Guido Trotter | def Exec(self, query): |
52 | e16e4824 | Guido Trotter | """Process a single UDP request from a client.
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53 | e16e4824 | Guido Trotter |
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54 | e16e4824 | Guido Trotter | Different queries should override this function, which by defaults returns
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55 | e16e4824 | Guido Trotter | a "non-implemented" answer.
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56 | e16e4824 | Guido Trotter |
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57 | e16e4824 | Guido Trotter | @type query: (undefined)
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58 | e16e4824 | Guido Trotter | @param query: ConfdRequest 'query' field
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59 | e16e4824 | Guido Trotter | @rtype: (integer, undefined)
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60 | e16e4824 | Guido Trotter | @return: status and answer to give to the client
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61 | e16e4824 | Guido Trotter |
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62 | e16e4824 | Guido Trotter | """
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63 | e16e4824 | Guido Trotter | status = constants.CONFD_REPL_STATUS_NOTIMPLEMENTED |
64 | e16e4824 | Guido Trotter | answer = 'not implemented'
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65 | e16e4824 | Guido Trotter | return status, answer
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66 | e16e4824 | Guido Trotter | |
67 | e16e4824 | Guido Trotter | |
68 | e16e4824 | Guido Trotter | class PingQuery(ConfdQuery): |
69 | e16e4824 | Guido Trotter | """An empty confd query.
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70 | e16e4824 | Guido Trotter |
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71 | 4d4a651d | Michael Hanselmann | It will return success on an empty argument, and an error on any other
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72 | 4d4a651d | Michael Hanselmann | argument.
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73 | e16e4824 | Guido Trotter |
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74 | e16e4824 | Guido Trotter | """
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75 | e16e4824 | Guido Trotter | def Exec(self, query): |
76 | 0bc8432b | Guido Trotter | """PingQuery main execution.
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77 | e16e4824 | Guido Trotter |
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78 | e16e4824 | Guido Trotter | """
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79 | e16e4824 | Guido Trotter | if query is None: |
80 | e16e4824 | Guido Trotter | status = constants.CONFD_REPL_STATUS_OK |
81 | e16e4824 | Guido Trotter | answer = 'ok'
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82 | e16e4824 | Guido Trotter | else:
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83 | e16e4824 | Guido Trotter | status = constants.CONFD_REPL_STATUS_ERROR |
84 | e16e4824 | Guido Trotter | answer = 'non-empty ping query'
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85 | e16e4824 | Guido Trotter | |
86 | e16e4824 | Guido Trotter | return status, answer
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87 | e16e4824 | Guido Trotter | |
88 | d73ef63f | Michael Hanselmann | |
89 | 48166551 | Guido Trotter | class ClusterMasterQuery(ConfdQuery): |
90 | 48166551 | Guido Trotter | """Cluster master query.
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91 | 48166551 | Guido Trotter |
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92 | 48166551 | Guido Trotter | It accepts no arguments, and returns the current cluster master.
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93 | 48166551 | Guido Trotter |
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94 | 48166551 | Guido Trotter | """
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95 | 48166551 | Guido Trotter | def Exec(self, query): |
96 | 48166551 | Guido Trotter | """ClusterMasterQuery main execution
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97 | 48166551 | Guido Trotter |
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98 | 48166551 | Guido Trotter | """
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99 | 48166551 | Guido Trotter | if query is None: |
100 | 48166551 | Guido Trotter | status = constants.CONFD_REPL_STATUS_OK |
101 | 48166551 | Guido Trotter | answer = self.reader.GetMasterNode()
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102 | 48166551 | Guido Trotter | else:
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103 | 48166551 | Guido Trotter | status = constants.CONFD_REPL_STATUS_ERROR |
104 | 48166551 | Guido Trotter | answer = 'master query accepts no query argument'
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105 | 48166551 | Guido Trotter | |
106 | 48166551 | Guido Trotter | return status, answer
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107 | 48166551 | Guido Trotter | |
108 | 6daf26a0 | Guido Trotter | |
109 | 6daf26a0 | Guido Trotter | class NodeRoleQuery(ConfdQuery): |
110 | 0bc8432b | Guido Trotter | """A query for the role of a node.
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111 | 6daf26a0 | Guido Trotter |
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112 | 0bc8432b | Guido Trotter | It will return one of CONFD_NODE_ROLE_*, or an error for non-existing nodes.
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113 | 6daf26a0 | Guido Trotter |
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114 | 6daf26a0 | Guido Trotter | """
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115 | 6daf26a0 | Guido Trotter | def Exec(self, query): |
116 | 6daf26a0 | Guido Trotter | """EmptyQuery main execution
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117 | 6daf26a0 | Guido Trotter |
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118 | 6daf26a0 | Guido Trotter | """
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119 | 6daf26a0 | Guido Trotter | node = query |
120 | 6daf26a0 | Guido Trotter | if self.reader.GetMasterNode() == node: |
121 | 6daf26a0 | Guido Trotter | status = constants.CONFD_REPL_STATUS_OK |
122 | 6daf26a0 | Guido Trotter | answer = constants.CONFD_NODE_ROLE_MASTER |
123 | 6daf26a0 | Guido Trotter | return status, answer
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124 | 6daf26a0 | Guido Trotter | flags = self.reader.GetNodeStatusFlags(node)
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125 | 6daf26a0 | Guido Trotter | if flags is None: |
126 | 7189e790 | Guido Trotter | return QUERY_UNKNOWN_ENTRY_ERROR
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127 | 6daf26a0 | Guido Trotter | |
128 | 6daf26a0 | Guido Trotter | master_candidate, drained, offline = flags |
129 | 6daf26a0 | Guido Trotter | if master_candidate:
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130 | 6daf26a0 | Guido Trotter | answer = constants.CONFD_NODE_ROLE_CANDIDATE |
131 | 6daf26a0 | Guido Trotter | elif drained:
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132 | 6daf26a0 | Guido Trotter | answer = constants.CONFD_NODE_ROLE_DRAINED |
133 | 6daf26a0 | Guido Trotter | elif offline:
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134 | 6daf26a0 | Guido Trotter | answer = constants.CONFD_NODE_ROLE_OFFLINE |
135 | 6daf26a0 | Guido Trotter | else:
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136 | 6daf26a0 | Guido Trotter | answer = constants.CONFD_NODE_ROLE_REGULAR |
137 | 6daf26a0 | Guido Trotter | |
138 | 6daf26a0 | Guido Trotter | return constants.CONFD_REPL_STATUS_OK, answer
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139 | 6daf26a0 | Guido Trotter | |
140 | 53bd7366 | Guido Trotter | |
141 | 53bd7366 | Guido Trotter | class InstanceIpToNodePrimaryIpQuery(ConfdQuery): |
142 | 0bc8432b | Guido Trotter | """A query for the location of an instance's ip.
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143 | 53bd7366 | Guido Trotter |
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144 | 0bc8432b | Guido Trotter | It returns the primary ip of the node hosting the instance having the
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145 | 0bc8432b | Guido Trotter | requested ip address, or an error if no such address is known.
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146 | 53bd7366 | Guido Trotter |
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147 | 53bd7366 | Guido Trotter | """
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148 | 53bd7366 | Guido Trotter | def Exec(self, query): |
149 | 0bc8432b | Guido Trotter | """InstanceIpToNodePrimaryIpQuery main execution.
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150 | 53bd7366 | Guido Trotter |
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151 | 53bd7366 | Guido Trotter | """
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152 | 53bd7366 | Guido Trotter | instance_ip = query |
153 | 53bd7366 | Guido Trotter | instance = self.reader.GetInstanceByIp(instance_ip)
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154 | 53bd7366 | Guido Trotter | if instance is None: |
155 | 53bd7366 | Guido Trotter | return QUERY_UNKNOWN_ENTRY_ERROR
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156 | 53bd7366 | Guido Trotter | |
157 | 53bd7366 | Guido Trotter | pnode = self.reader.GetInstancePrimaryNode(instance)
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158 | 53bd7366 | Guido Trotter | if pnode is None: |
159 | 53bd7366 | Guido Trotter | # this shouldn't happen
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160 | 53bd7366 | Guido Trotter | logging.error("Internal configuration inconsistent (instance-to-pnode)")
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161 | 53bd7366 | Guido Trotter | return QUERY_INTERNAL_ERROR
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162 | 53bd7366 | Guido Trotter | |
163 | 53bd7366 | Guido Trotter | pnode_primary_ip = self.reader.GetNodePrimaryIp(pnode)
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164 | 53bd7366 | Guido Trotter | if pnode_primary_ip is None: |
165 | 53bd7366 | Guido Trotter | # this shouldn't happen
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166 | 53bd7366 | Guido Trotter | logging.error("Internal configuration inconsistent (node-to-primary-ip)")
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167 | 53bd7366 | Guido Trotter | return QUERY_INTERNAL_ERROR
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168 | 53bd7366 | Guido Trotter | |
169 | 53bd7366 | Guido Trotter | return constants.CONFD_REPL_STATUS_OK, pnode_primary_ip
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170 | efbb4fd2 | Luca Bigliardi | |
171 | efbb4fd2 | Luca Bigliardi | |
172 | efbb4fd2 | Luca Bigliardi | class NodesPipsQuery(ConfdQuery): |
173 | efbb4fd2 | Luca Bigliardi | """A query for nodes primary IPs.
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174 | efbb4fd2 | Luca Bigliardi |
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175 | efbb4fd2 | Luca Bigliardi | It returns the list of nodes primary IPs.
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176 | efbb4fd2 | Luca Bigliardi |
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177 | efbb4fd2 | Luca Bigliardi | """
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178 | efbb4fd2 | Luca Bigliardi | def Exec(self, query): |
179 | efbb4fd2 | Luca Bigliardi | """NodesPipsQuery main execution.
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180 | efbb4fd2 | Luca Bigliardi |
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181 | efbb4fd2 | Luca Bigliardi | """
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182 | efbb4fd2 | Luca Bigliardi | if query is None: |
183 | efbb4fd2 | Luca Bigliardi | status = constants.CONFD_REPL_STATUS_OK |
184 | efbb4fd2 | Luca Bigliardi | answer = self.reader.GetNodesPrimaryIps()
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185 | efbb4fd2 | Luca Bigliardi | else:
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186 | efbb4fd2 | Luca Bigliardi | status = constants.CONFD_REPL_STATUS_ERROR |
187 | efbb4fd2 | Luca Bigliardi | answer = "non-empty node primary IPs query"
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188 | efbb4fd2 | Luca Bigliardi | |
189 | efbb4fd2 | Luca Bigliardi | return status, answer
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190 | efbb4fd2 | Luca Bigliardi | |
191 | efbb4fd2 | Luca Bigliardi | |
192 | efbb4fd2 | Luca Bigliardi | class MasterCandidatesPipsQuery(ConfdQuery): |
193 | efbb4fd2 | Luca Bigliardi | """A query for master candidates primary IPs.
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194 | efbb4fd2 | Luca Bigliardi |
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195 | efbb4fd2 | Luca Bigliardi | It returns the list of master candidates primary IPs.
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196 | efbb4fd2 | Luca Bigliardi |
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197 | efbb4fd2 | Luca Bigliardi | """
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198 | efbb4fd2 | Luca Bigliardi | def Exec(self, query): |
199 | efbb4fd2 | Luca Bigliardi | """MasterCandidatesPipsQuery main execution.
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200 | efbb4fd2 | Luca Bigliardi |
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201 | efbb4fd2 | Luca Bigliardi | """
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202 | efbb4fd2 | Luca Bigliardi | if query is None: |
203 | efbb4fd2 | Luca Bigliardi | status = constants.CONFD_REPL_STATUS_OK |
204 | efbb4fd2 | Luca Bigliardi | answer = self.reader.GetMasterCandidatesPrimaryIps()
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205 | efbb4fd2 | Luca Bigliardi | else:
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206 | efbb4fd2 | Luca Bigliardi | status = constants.CONFD_REPL_STATUS_ERROR |
207 | efbb4fd2 | Luca Bigliardi | answer = "non-empty master candidates primary IPs query"
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208 | efbb4fd2 | Luca Bigliardi | |
209 | efbb4fd2 | Luca Bigliardi | return status, answer
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210 | efbb4fd2 | Luca Bigliardi | |
211 | d01ae714 | Luca Bigliardi | |
212 | d01ae714 | Luca Bigliardi | class InstancesIpsQuery(ConfdQuery): |
213 | d01ae714 | Luca Bigliardi | """A query for instances IPs.
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214 | d01ae714 | Luca Bigliardi |
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215 | 23824641 | Luca Bigliardi | It returns the list of IPs of NICs connected to the requested link or all the
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216 | 23824641 | Luca Bigliardi | instances IPs if no link is submitted.
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217 | d01ae714 | Luca Bigliardi |
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218 | d01ae714 | Luca Bigliardi | """
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219 | d01ae714 | Luca Bigliardi | def Exec(self, query): |
220 | d01ae714 | Luca Bigliardi | """InstancesIpsQuery main execution.
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221 | d01ae714 | Luca Bigliardi |
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222 | d01ae714 | Luca Bigliardi | """
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223 | 23824641 | Luca Bigliardi | link = query |
224 | 23824641 | Luca Bigliardi | status = constants.CONFD_REPL_STATUS_OK |
225 | 23824641 | Luca Bigliardi | answer = self.reader.GetInstancesIps(link)
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226 | d01ae714 | Luca Bigliardi | |
227 | d01ae714 | Luca Bigliardi | return status, answer
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