root / lib / confd / querylib.py @ 9b94905f
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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 | 19351457 | Guido Trotter | QUERY_ARGUMENT_ERROR = (constants.CONFD_REPL_STATUS_ERROR, |
37 | 19351457 | Guido Trotter | constants.CONFD_ERROR_ARGUMENT) |
38 | e16e4824 | Guido Trotter | |
39 | d73ef63f | Michael Hanselmann | |
40 | e16e4824 | Guido Trotter | class ConfdQuery(object): |
41 | e16e4824 | Guido Trotter | """Confd Query base class.
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42 | e16e4824 | Guido Trotter |
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43 | e16e4824 | Guido Trotter | """
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44 | e16e4824 | Guido Trotter | def __init__(self, reader): |
45 | e16e4824 | Guido Trotter | """Constructor for Confd Query
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46 | e16e4824 | Guido Trotter |
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47 | e16e4824 | Guido Trotter | @type reader: L{ssconf.SimpleConfigReader}
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48 | e16e4824 | Guido Trotter | @param reader: ConfigReader to use to access the config
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49 | e16e4824 | Guido Trotter |
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50 | e16e4824 | Guido Trotter | """
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51 | e16e4824 | Guido Trotter | self.reader = reader
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52 | e16e4824 | Guido Trotter | |
53 | e16e4824 | Guido Trotter | def Exec(self, query): |
54 | e16e4824 | Guido Trotter | """Process a single UDP request from a client.
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55 | e16e4824 | Guido Trotter |
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56 | e16e4824 | Guido Trotter | Different queries should override this function, which by defaults returns
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57 | e16e4824 | Guido Trotter | a "non-implemented" answer.
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58 | e16e4824 | Guido Trotter |
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59 | e16e4824 | Guido Trotter | @type query: (undefined)
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60 | e16e4824 | Guido Trotter | @param query: ConfdRequest 'query' field
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61 | e16e4824 | Guido Trotter | @rtype: (integer, undefined)
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62 | e16e4824 | Guido Trotter | @return: status and answer to give to the client
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63 | e16e4824 | Guido Trotter |
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64 | e16e4824 | Guido Trotter | """
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65 | e16e4824 | Guido Trotter | status = constants.CONFD_REPL_STATUS_NOTIMPLEMENTED |
66 | e16e4824 | Guido Trotter | answer = 'not implemented'
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67 | e16e4824 | Guido Trotter | return status, answer
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68 | e16e4824 | Guido Trotter | |
69 | e16e4824 | Guido Trotter | |
70 | e16e4824 | Guido Trotter | class PingQuery(ConfdQuery): |
71 | e16e4824 | Guido Trotter | """An empty confd query.
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72 | e16e4824 | Guido Trotter |
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73 | 4d4a651d | Michael Hanselmann | It will return success on an empty argument, and an error on any other
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74 | 4d4a651d | Michael Hanselmann | argument.
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75 | e16e4824 | Guido Trotter |
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76 | e16e4824 | Guido Trotter | """
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77 | e16e4824 | Guido Trotter | def Exec(self, query): |
78 | 0bc8432b | Guido Trotter | """PingQuery main execution.
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79 | e16e4824 | Guido Trotter |
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80 | e16e4824 | Guido Trotter | """
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81 | e16e4824 | Guido Trotter | if query is None: |
82 | e16e4824 | Guido Trotter | status = constants.CONFD_REPL_STATUS_OK |
83 | e16e4824 | Guido Trotter | answer = 'ok'
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84 | e16e4824 | Guido Trotter | else:
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85 | e16e4824 | Guido Trotter | status = constants.CONFD_REPL_STATUS_ERROR |
86 | e16e4824 | Guido Trotter | answer = 'non-empty ping query'
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87 | e16e4824 | Guido Trotter | |
88 | e16e4824 | Guido Trotter | return status, answer
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89 | e16e4824 | Guido Trotter | |
90 | d73ef63f | Michael Hanselmann | |
91 | 48166551 | Guido Trotter | class ClusterMasterQuery(ConfdQuery): |
92 | 48166551 | Guido Trotter | """Cluster master query.
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93 | 48166551 | Guido Trotter |
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94 | 48166551 | Guido Trotter | It accepts no arguments, and returns the current cluster master.
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95 | 48166551 | Guido Trotter |
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96 | 48166551 | Guido Trotter | """
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97 | 48166551 | Guido Trotter | def Exec(self, query): |
98 | 48166551 | Guido Trotter | """ClusterMasterQuery main execution
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99 | 48166551 | Guido Trotter |
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100 | 48166551 | Guido Trotter | """
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101 | 48166551 | Guido Trotter | if query is None: |
102 | 48166551 | Guido Trotter | status = constants.CONFD_REPL_STATUS_OK |
103 | 48166551 | Guido Trotter | answer = self.reader.GetMasterNode()
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104 | 48166551 | Guido Trotter | else:
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105 | 48166551 | Guido Trotter | status = constants.CONFD_REPL_STATUS_ERROR |
106 | 48166551 | Guido Trotter | answer = 'master query accepts no query argument'
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107 | 48166551 | Guido Trotter | |
108 | 48166551 | Guido Trotter | return status, answer
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109 | 48166551 | Guido Trotter | |
110 | 6daf26a0 | Guido Trotter | |
111 | 6daf26a0 | Guido Trotter | class NodeRoleQuery(ConfdQuery): |
112 | 0bc8432b | Guido Trotter | """A query for the role of a node.
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113 | 6daf26a0 | Guido Trotter |
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114 | 0bc8432b | Guido Trotter | It will return one of CONFD_NODE_ROLE_*, or an error for non-existing nodes.
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115 | 6daf26a0 | Guido Trotter |
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116 | 6daf26a0 | Guido Trotter | """
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117 | 6daf26a0 | Guido Trotter | def Exec(self, query): |
118 | 6daf26a0 | Guido Trotter | """EmptyQuery main execution
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119 | 6daf26a0 | Guido Trotter |
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120 | 6daf26a0 | Guido Trotter | """
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121 | 6daf26a0 | Guido Trotter | node = query |
122 | 6daf26a0 | Guido Trotter | if self.reader.GetMasterNode() == node: |
123 | 6daf26a0 | Guido Trotter | status = constants.CONFD_REPL_STATUS_OK |
124 | 6daf26a0 | Guido Trotter | answer = constants.CONFD_NODE_ROLE_MASTER |
125 | 6daf26a0 | Guido Trotter | return status, answer
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126 | 6daf26a0 | Guido Trotter | flags = self.reader.GetNodeStatusFlags(node)
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127 | 6daf26a0 | Guido Trotter | if flags is None: |
128 | 7189e790 | Guido Trotter | return QUERY_UNKNOWN_ENTRY_ERROR
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129 | 6daf26a0 | Guido Trotter | |
130 | 6daf26a0 | Guido Trotter | master_candidate, drained, offline = flags |
131 | 6daf26a0 | Guido Trotter | if master_candidate:
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132 | 6daf26a0 | Guido Trotter | answer = constants.CONFD_NODE_ROLE_CANDIDATE |
133 | 6daf26a0 | Guido Trotter | elif drained:
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134 | 6daf26a0 | Guido Trotter | answer = constants.CONFD_NODE_ROLE_DRAINED |
135 | 6daf26a0 | Guido Trotter | elif offline:
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136 | 6daf26a0 | Guido Trotter | answer = constants.CONFD_NODE_ROLE_OFFLINE |
137 | 6daf26a0 | Guido Trotter | else:
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138 | 6daf26a0 | Guido Trotter | answer = constants.CONFD_NODE_ROLE_REGULAR |
139 | 6daf26a0 | Guido Trotter | |
140 | 6daf26a0 | Guido Trotter | return constants.CONFD_REPL_STATUS_OK, answer
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141 | 6daf26a0 | Guido Trotter | |
142 | 53bd7366 | Guido Trotter | |
143 | 53bd7366 | Guido Trotter | class InstanceIpToNodePrimaryIpQuery(ConfdQuery): |
144 | 95b487bb | Flavio Silvestrow | """A query for the location of one or more instance's ips.
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145 | 53bd7366 | Guido Trotter |
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146 | 19351457 | Guido Trotter | @type query: string or dict
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147 | 19351457 | Guido Trotter | @param query: instance ip or dict containing:
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148 | 19351457 | Guido Trotter | constants.CONFD_REQQ_LINK: nic link (optional)
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149 | 19351457 | Guido Trotter | constants.CONFD_REQQ_IPLIST: list of ips
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150 | 19351457 | Guido Trotter | constants.CONFD_REQQ_IP: single ip
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151 | 19351457 | Guido Trotter | (one IP type request is mandatory)
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152 | 19351457 | Guido Trotter | @rtype: (integer, ...)
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153 | 19351457 | Guido Trotter | @return: ((status, answer) or (success, [(status, answer)...])
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154 | 53bd7366 | Guido Trotter |
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155 | 53bd7366 | Guido Trotter | """
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156 | 53bd7366 | Guido Trotter | def Exec(self, query): |
157 | 0bc8432b | Guido Trotter | """InstanceIpToNodePrimaryIpQuery main execution.
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158 | 53bd7366 | Guido Trotter |
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159 | 53bd7366 | Guido Trotter | """
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160 | 19351457 | Guido Trotter | if isinstance(query, dict): |
161 | 19351457 | Guido Trotter | if constants.CONFD_REQQ_IP in query: |
162 | 19351457 | Guido Trotter | instances_list = [query[constants.CONFD_REQQ_IP]] |
163 | 19351457 | Guido Trotter | mode = constants.CONFD_REQQ_IP |
164 | 19351457 | Guido Trotter | elif constants.CONFD_REQQ_IPLIST in query: |
165 | 19351457 | Guido Trotter | instances_list = query[constants.CONFD_REQQ_IPLIST] |
166 | 19351457 | Guido Trotter | mode = constants.CONFD_REQQ_IPLIST |
167 | 19351457 | Guido Trotter | else:
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168 | 19351457 | Guido Trotter | status = constants.CONFD_REPL_STATUS_ERROR |
169 | 19351457 | Guido Trotter | logging.debug("missing IP or IPLIST in query dict")
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170 | 19351457 | Guido Trotter | return QUERY_ARGUMENT_ERROR
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171 | 19351457 | Guido Trotter | |
172 | 19351457 | Guido Trotter | if constants.CONFD_REQQ_LINK in query: |
173 | 19351457 | Guido Trotter | network_link = query[constants.CONFD_REQQ_LINK] |
174 | 19351457 | Guido Trotter | else:
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175 | 19351457 | Guido Trotter | network_link = None # default will be used |
176 | 19351457 | Guido Trotter | elif isinstance(query, basestring): |
177 | 19351457 | Guido Trotter | # 2.1 beta1 and beta2 mode, to be deprecated for 2.2
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178 | 95b487bb | Flavio Silvestrow | instances_list = [query] |
179 | 19351457 | Guido Trotter | network_link = None
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180 | 19351457 | Guido Trotter | mode = constants.CONFD_REQQ_IP |
181 | 19351457 | Guido Trotter | else:
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182 | 19351457 | Guido Trotter | logging.debug("Invalid query argument type for: %s" % query)
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183 | 19351457 | Guido Trotter | return QUERY_ARGUMENT_ERROR
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184 | 19351457 | Guido Trotter | |
185 | 95b487bb | Flavio Silvestrow | pnodes_list = [] |
186 | 95b487bb | Flavio Silvestrow | |
187 | 95b487bb | Flavio Silvestrow | for instance_ip in instances_list: |
188 | 19351457 | Guido Trotter | if not isinstance(instance_ip, basestring): |
189 | 19351457 | Guido Trotter | logging.debug("Invalid IP type for: %s" % instance_ip)
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190 | 19351457 | Guido Trotter | return QUERY_ARGUMENT_ERROR
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191 | 19351457 | Guido Trotter | |
192 | 19351457 | Guido Trotter | instance = self.reader.GetInstanceByLinkIp(instance_ip, network_link)
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193 | 95b487bb | Flavio Silvestrow | if not instance: |
194 | 19351457 | Guido Trotter | logging.debug("Unknown instance IP: %s" % instance_ip)
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195 | 95b487bb | Flavio Silvestrow | pnodes_list.append(QUERY_UNKNOWN_ENTRY_ERROR) |
196 | 95b487bb | Flavio Silvestrow | continue
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197 | 53bd7366 | Guido Trotter | |
198 | 95b487bb | Flavio Silvestrow | pnode = self.reader.GetInstancePrimaryNode(instance)
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199 | 95b487bb | Flavio Silvestrow | if not pnode: |
200 | 95b487bb | Flavio Silvestrow | logging.error("Instance '%s' doesn't have an associated primary"
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201 | 95b487bb | Flavio Silvestrow | " node" % instance)
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202 | 95b487bb | Flavio Silvestrow | pnodes_list.append(QUERY_INTERNAL_ERROR) |
203 | 95b487bb | Flavio Silvestrow | continue
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204 | 53bd7366 | Guido Trotter | |
205 | 95b487bb | Flavio Silvestrow | pnode_primary_ip = self.reader.GetNodePrimaryIp(pnode)
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206 | 95b487bb | Flavio Silvestrow | if not pnode_primary_ip: |
207 | 95b487bb | Flavio Silvestrow | logging.error("Primary node '%s' doesn't have an associated"
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208 | 95b487bb | Flavio Silvestrow | " primary IP" % pnode)
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209 | 95b487bb | Flavio Silvestrow | pnodes_list.append(QUERY_INTERNAL_ERROR) |
210 | 95b487bb | Flavio Silvestrow | continue
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211 | 53bd7366 | Guido Trotter | |
212 | 95b487bb | Flavio Silvestrow | pnodes_list.append((constants.CONFD_REPL_STATUS_OK, pnode_primary_ip)) |
213 | 95b487bb | Flavio Silvestrow | |
214 | 19351457 | Guido Trotter | # If a single ip was requested, return a single answer, otherwise the whole
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215 | 19351457 | Guido Trotter | # list, with a success status (since each entry has its own success/failure)
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216 | 19351457 | Guido Trotter | if mode == constants.CONFD_REQQ_IP:
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217 | 95b487bb | Flavio Silvestrow | return pnodes_list[0] |
218 | 95b487bb | Flavio Silvestrow | |
219 | 95b487bb | Flavio Silvestrow | return constants.CONFD_REPL_STATUS_OK, pnodes_list
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220 | efbb4fd2 | Luca Bigliardi | |
221 | efbb4fd2 | Luca Bigliardi | |
222 | efbb4fd2 | Luca Bigliardi | class NodesPipsQuery(ConfdQuery): |
223 | efbb4fd2 | Luca Bigliardi | """A query for nodes primary IPs.
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224 | efbb4fd2 | Luca Bigliardi |
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225 | efbb4fd2 | Luca Bigliardi | It returns the list of nodes primary IPs.
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226 | efbb4fd2 | Luca Bigliardi |
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227 | efbb4fd2 | Luca Bigliardi | """
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228 | efbb4fd2 | Luca Bigliardi | def Exec(self, query): |
229 | efbb4fd2 | Luca Bigliardi | """NodesPipsQuery main execution.
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230 | efbb4fd2 | Luca Bigliardi |
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231 | efbb4fd2 | Luca Bigliardi | """
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232 | efbb4fd2 | Luca Bigliardi | if query is None: |
233 | efbb4fd2 | Luca Bigliardi | status = constants.CONFD_REPL_STATUS_OK |
234 | efbb4fd2 | Luca Bigliardi | answer = self.reader.GetNodesPrimaryIps()
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235 | efbb4fd2 | Luca Bigliardi | else:
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236 | efbb4fd2 | Luca Bigliardi | status = constants.CONFD_REPL_STATUS_ERROR |
237 | efbb4fd2 | Luca Bigliardi | answer = "non-empty node primary IPs query"
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238 | efbb4fd2 | Luca Bigliardi | |
239 | efbb4fd2 | Luca Bigliardi | return status, answer
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240 | efbb4fd2 | Luca Bigliardi | |
241 | efbb4fd2 | Luca Bigliardi | |
242 | efbb4fd2 | Luca Bigliardi | class MasterCandidatesPipsQuery(ConfdQuery): |
243 | efbb4fd2 | Luca Bigliardi | """A query for master candidates primary IPs.
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244 | efbb4fd2 | Luca Bigliardi |
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245 | efbb4fd2 | Luca Bigliardi | It returns the list of master candidates primary IPs.
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246 | efbb4fd2 | Luca Bigliardi |
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247 | efbb4fd2 | Luca Bigliardi | """
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248 | efbb4fd2 | Luca Bigliardi | def Exec(self, query): |
249 | efbb4fd2 | Luca Bigliardi | """MasterCandidatesPipsQuery main execution.
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250 | efbb4fd2 | Luca Bigliardi |
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251 | efbb4fd2 | Luca Bigliardi | """
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252 | efbb4fd2 | Luca Bigliardi | if query is None: |
253 | efbb4fd2 | Luca Bigliardi | status = constants.CONFD_REPL_STATUS_OK |
254 | efbb4fd2 | Luca Bigliardi | answer = self.reader.GetMasterCandidatesPrimaryIps()
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255 | efbb4fd2 | Luca Bigliardi | else:
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256 | efbb4fd2 | Luca Bigliardi | status = constants.CONFD_REPL_STATUS_ERROR |
257 | efbb4fd2 | Luca Bigliardi | answer = "non-empty master candidates primary IPs query"
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258 | efbb4fd2 | Luca Bigliardi | |
259 | efbb4fd2 | Luca Bigliardi | return status, answer
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260 | efbb4fd2 | Luca Bigliardi | |
261 | d01ae714 | Luca Bigliardi | |
262 | d01ae714 | Luca Bigliardi | class InstancesIpsQuery(ConfdQuery): |
263 | d01ae714 | Luca Bigliardi | """A query for instances IPs.
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264 | d01ae714 | Luca Bigliardi |
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265 | 23824641 | Luca Bigliardi | It returns the list of IPs of NICs connected to the requested link or all the
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266 | 23824641 | Luca Bigliardi | instances IPs if no link is submitted.
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267 | d01ae714 | Luca Bigliardi |
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268 | d01ae714 | Luca Bigliardi | """
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269 | d01ae714 | Luca Bigliardi | def Exec(self, query): |
270 | d01ae714 | Luca Bigliardi | """InstancesIpsQuery main execution.
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271 | d01ae714 | Luca Bigliardi |
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272 | d01ae714 | Luca Bigliardi | """
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273 | 23824641 | Luca Bigliardi | link = query |
274 | 23824641 | Luca Bigliardi | status = constants.CONFD_REPL_STATUS_OK |
275 | 23824641 | Luca Bigliardi | answer = self.reader.GetInstancesIps(link)
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276 | d01ae714 | Luca Bigliardi | |
277 | d01ae714 | Luca Bigliardi | return status, answer |