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1 | c2a03789 | Iustin Pop | #
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2 | c2a03789 | Iustin Pop | #
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3 | c2a03789 | Iustin Pop | |
4 | 83c046a2 | Iustin Pop | # Copyright (C) 2006, 2007, 2011, 2012 Google Inc.
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5 | c2a03789 | Iustin Pop | #
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6 | c2a03789 | Iustin Pop | # This program is free software; you can redistribute it and/or modify
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7 | c2a03789 | Iustin Pop | # it under the terms of the GNU General Public License as published by
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8 | c2a03789 | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or
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9 | c2a03789 | Iustin Pop | # (at your option) any later version.
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10 | c2a03789 | Iustin Pop | #
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11 | c2a03789 | Iustin Pop | # This program is distributed in the hope that it will be useful, but
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12 | c2a03789 | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | c2a03789 | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | c2a03789 | Iustin Pop | # General Public License for more details.
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15 | c2a03789 | Iustin Pop | #
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16 | c2a03789 | Iustin Pop | # You should have received a copy of the GNU General Public License
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17 | c2a03789 | Iustin Pop | # along with this program; if not, write to the Free Software
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18 | c2a03789 | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | c2a03789 | Iustin Pop | # 02110-1301, USA.
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20 | c2a03789 | Iustin Pop | |
21 | c2a03789 | Iustin Pop | |
22 | c2a03789 | Iustin Pop | """Module for the unix socket protocol
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23 | c2a03789 | Iustin Pop |
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24 | 8d5b316c | Iustin Pop | This module implements the local unix socket protocol. You only need
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25 | c2a03789 | Iustin Pop | this module and the opcodes module in the client program in order to
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26 | c2a03789 | Iustin Pop | communicate with the master.
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27 | c2a03789 | Iustin Pop |
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28 | 7577196d | Guido Trotter | The module is also used by the master daemon.
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29 | c2a03789 | Iustin Pop |
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30 | c2a03789 | Iustin Pop | """
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31 | c2a03789 | Iustin Pop | |
32 | c2a03789 | Iustin Pop | import socket |
33 | c2a03789 | Iustin Pop | import collections |
34 | c2a03789 | Iustin Pop | import time |
35 | 03a8dbdc | Iustin Pop | import errno |
36 | 231db3a5 | Michael Hanselmann | import logging |
37 | c2a03789 | Iustin Pop | |
38 | b8028dcf | Michael Hanselmann | from ganeti import compat |
39 | fad50141 | Michael Hanselmann | from ganeti import serializer |
40 | ceab32dd | Iustin Pop | from ganeti import constants |
41 | 6797ec29 | Iustin Pop | from ganeti import errors |
42 | cb462b06 | Michael Hanselmann | from ganeti import utils |
43 | 28b71a76 | Michael Hanselmann | from ganeti import objects |
44 | b87ee98f | Michael Hanselmann | from ganeti import pathutils |
45 | c2a03789 | Iustin Pop | |
46 | c2a03789 | Iustin Pop | |
47 | 231db3a5 | Michael Hanselmann | KEY_METHOD = "method"
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48 | 231db3a5 | Michael Hanselmann | KEY_ARGS = "args"
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49 | 3d8548c4 | Michael Hanselmann | KEY_SUCCESS = "success"
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50 | 3d8548c4 | Michael Hanselmann | KEY_RESULT = "result"
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51 | e986f20c | Michael Hanselmann | KEY_VERSION = "version"
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52 | 3d8548c4 | Michael Hanselmann | |
53 | 0bbe448c | Michael Hanselmann | REQ_SUBMIT_JOB = "SubmitJob"
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54 | 2971c913 | Iustin Pop | REQ_SUBMIT_MANY_JOBS = "SubmitManyJobs"
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55 | dfe57c22 | Michael Hanselmann | REQ_WAIT_FOR_JOB_CHANGE = "WaitForJobChange"
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56 | 0bbe448c | Michael Hanselmann | REQ_CANCEL_JOB = "CancelJob"
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57 | 0bbe448c | Michael Hanselmann | REQ_ARCHIVE_JOB = "ArchiveJob"
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58 | f63ffb37 | Michael Hanselmann | REQ_CHANGE_JOB_PRIORITY = "ChangeJobPriority"
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59 | 83c046a2 | Iustin Pop | REQ_AUTO_ARCHIVE_JOBS = "AutoArchiveJobs"
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60 | 28b71a76 | Michael Hanselmann | REQ_QUERY = "Query"
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61 | 28b71a76 | Michael Hanselmann | REQ_QUERY_FIELDS = "QueryFields"
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62 | 0bbe448c | Michael Hanselmann | REQ_QUERY_JOBS = "QueryJobs"
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63 | ee6c7b94 | Michael Hanselmann | REQ_QUERY_INSTANCES = "QueryInstances"
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64 | 02f7fe54 | Michael Hanselmann | REQ_QUERY_NODES = "QueryNodes"
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65 | a79ef2a5 | Adeodato Simo | REQ_QUERY_GROUPS = "QueryGroups"
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66 | 306bed0e | Apollon Oikonomopoulos | REQ_QUERY_NETWORKS = "QueryNetworks"
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67 | 32f93223 | Michael Hanselmann | REQ_QUERY_EXPORTS = "QueryExports"
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68 | ae5849b5 | Michael Hanselmann | REQ_QUERY_CONFIG_VALUES = "QueryConfigValues"
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69 | 66baeccc | Iustin Pop | REQ_QUERY_CLUSTER_INFO = "QueryClusterInfo"
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70 | 7699c3af | Iustin Pop | REQ_QUERY_TAGS = "QueryTags"
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71 | 83c046a2 | Iustin Pop | REQ_SET_DRAIN_FLAG = "SetDrainFlag"
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72 | 05e50653 | Michael Hanselmann | REQ_SET_WATCHER_PAUSE = "SetWatcherPause"
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73 | c2a03789 | Iustin Pop | |
74 | e3a25810 | Michael Hanselmann | #: List of all LUXI requests
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75 | b8028dcf | Michael Hanselmann | REQ_ALL = compat.UniqueFrozenset([ |
76 | e3a25810 | Michael Hanselmann | REQ_ARCHIVE_JOB, |
77 | 83c046a2 | Iustin Pop | REQ_AUTO_ARCHIVE_JOBS, |
78 | e3a25810 | Michael Hanselmann | REQ_CANCEL_JOB, |
79 | f63ffb37 | Michael Hanselmann | REQ_CHANGE_JOB_PRIORITY, |
80 | e3a25810 | Michael Hanselmann | REQ_QUERY, |
81 | e3a25810 | Michael Hanselmann | REQ_QUERY_CLUSTER_INFO, |
82 | e3a25810 | Michael Hanselmann | REQ_QUERY_CONFIG_VALUES, |
83 | e3a25810 | Michael Hanselmann | REQ_QUERY_EXPORTS, |
84 | e3a25810 | Michael Hanselmann | REQ_QUERY_FIELDS, |
85 | e3a25810 | Michael Hanselmann | REQ_QUERY_GROUPS, |
86 | e3a25810 | Michael Hanselmann | REQ_QUERY_INSTANCES, |
87 | e3a25810 | Michael Hanselmann | REQ_QUERY_JOBS, |
88 | e3a25810 | Michael Hanselmann | REQ_QUERY_NODES, |
89 | 795d035d | Klaus Aehlig | REQ_QUERY_NETWORKS, |
90 | e3a25810 | Michael Hanselmann | REQ_QUERY_TAGS, |
91 | 83c046a2 | Iustin Pop | REQ_SET_DRAIN_FLAG, |
92 | e3a25810 | Michael Hanselmann | REQ_SET_WATCHER_PAUSE, |
93 | e3a25810 | Michael Hanselmann | REQ_SUBMIT_JOB, |
94 | e3a25810 | Michael Hanselmann | REQ_SUBMIT_MANY_JOBS, |
95 | e3a25810 | Michael Hanselmann | REQ_WAIT_FOR_JOB_CHANGE, |
96 | e3a25810 | Michael Hanselmann | ]) |
97 | e3a25810 | Michael Hanselmann | |
98 | c2a03789 | Iustin Pop | DEF_CTMO = 10
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99 | c2a03789 | Iustin Pop | DEF_RWTO = 60
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100 | c2a03789 | Iustin Pop | |
101 | 793a8f7c | Michael Hanselmann | # WaitForJobChange timeout
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102 | 793a8f7c | Michael Hanselmann | WFJC_TIMEOUT = (DEF_RWTO - 1) / 2 |
103 | 793a8f7c | Michael Hanselmann | |
104 | c2a03789 | Iustin Pop | |
105 | 7a8bda3f | Michael Hanselmann | class ProtocolError(errors.LuxiError): |
106 | 5a1c22fe | Iustin Pop | """Denotes an error in the LUXI protocol."""
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107 | c2a03789 | Iustin Pop | |
108 | c2a03789 | Iustin Pop | |
109 | c2a03789 | Iustin Pop | class ConnectionClosedError(ProtocolError): |
110 | 5a1c22fe | Iustin Pop | """Connection closed error."""
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111 | c2a03789 | Iustin Pop | |
112 | c2a03789 | Iustin Pop | |
113 | c2a03789 | Iustin Pop | class TimeoutError(ProtocolError): |
114 | 5a1c22fe | Iustin Pop | """Operation timeout error."""
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115 | c2a03789 | Iustin Pop | |
116 | c2a03789 | Iustin Pop | |
117 | b77acb3e | Iustin Pop | class RequestError(ProtocolError): |
118 | 5a1c22fe | Iustin Pop | """Error on request.
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119 | b77acb3e | Iustin Pop |
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120 | b77acb3e | Iustin Pop | This signifies an error in the request format or request handling,
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121 | b77acb3e | Iustin Pop | but not (e.g.) an error in starting up an instance.
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122 | b77acb3e | Iustin Pop |
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123 | b77acb3e | Iustin Pop | Some common conditions that can trigger this exception:
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124 | b77acb3e | Iustin Pop | - job submission failed because the job data was wrong
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125 | b77acb3e | Iustin Pop | - query failed because required fields were missing
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126 | b77acb3e | Iustin Pop |
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127 | b77acb3e | Iustin Pop | """
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128 | b77acb3e | Iustin Pop | |
129 | 3d8548c4 | Michael Hanselmann | |
130 | 03a8dbdc | Iustin Pop | class NoMasterError(ProtocolError): |
131 | 5a1c22fe | Iustin Pop | """The master cannot be reached.
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132 | 03a8dbdc | Iustin Pop |
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133 | 03a8dbdc | Iustin Pop | This means that the master daemon is not running or the socket has
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134 | 03a8dbdc | Iustin Pop | been removed.
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135 | 03a8dbdc | Iustin Pop |
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136 | 03a8dbdc | Iustin Pop | """
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137 | 03a8dbdc | Iustin Pop | |
138 | b77acb3e | Iustin Pop | |
139 | 5a1c22fe | Iustin Pop | class PermissionError(ProtocolError): |
140 | 5a1c22fe | Iustin Pop | """Permission denied while connecting to the master socket.
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141 | 5a1c22fe | Iustin Pop |
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142 | 5a1c22fe | Iustin Pop | This means the user doesn't have the proper rights.
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143 | 5a1c22fe | Iustin Pop |
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144 | 5a1c22fe | Iustin Pop | """
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145 | 5a1c22fe | Iustin Pop | |
146 | 5a1c22fe | Iustin Pop | |
147 | c2a03789 | Iustin Pop | class Transport: |
148 | c2a03789 | Iustin Pop | """Low-level transport class.
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149 | c2a03789 | Iustin Pop |
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150 | c2a03789 | Iustin Pop | This is used on the client side.
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151 | c2a03789 | Iustin Pop |
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152 | c2a03789 | Iustin Pop | This could be replace by any other class that provides the same
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153 | c2a03789 | Iustin Pop | semantics to the Client. This means:
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154 | c2a03789 | Iustin Pop | - can send messages and receive messages
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155 | c2a03789 | Iustin Pop | - safe for multithreading
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156 | c2a03789 | Iustin Pop |
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157 | c2a03789 | Iustin Pop | """
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158 | c2a03789 | Iustin Pop | |
159 | 25942a6c | Guido Trotter | def __init__(self, address, timeouts=None): |
160 | c2a03789 | Iustin Pop | """Constructor for the Client class.
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161 | c2a03789 | Iustin Pop |
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162 | c2a03789 | Iustin Pop | Arguments:
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163 | c2a03789 | Iustin Pop | - address: a valid address the the used transport class
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164 | c2a03789 | Iustin Pop | - timeout: a list of timeouts, to be used on connect and read/write
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165 | c2a03789 | Iustin Pop |
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166 | c2a03789 | Iustin Pop | There are two timeouts used since we might want to wait for a long
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167 | c2a03789 | Iustin Pop | time for a response, but the connect timeout should be lower.
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168 | c2a03789 | Iustin Pop |
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169 | c2a03789 | Iustin Pop | If not passed, we use a default of 10 and respectively 60 seconds.
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170 | c2a03789 | Iustin Pop |
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171 | c2a03789 | Iustin Pop | Note that on reading data, since the timeout applies to an
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172 | c2a03789 | Iustin Pop | invidual receive, it might be that the total duration is longer
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173 | c2a03789 | Iustin Pop | than timeout value passed (we make a hard limit at twice the read
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174 | c2a03789 | Iustin Pop | timeout).
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175 | c2a03789 | Iustin Pop |
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176 | c2a03789 | Iustin Pop | """
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177 | c2a03789 | Iustin Pop | self.address = address
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178 | c2a03789 | Iustin Pop | if timeouts is None: |
179 | c2a03789 | Iustin Pop | self._ctimeout, self._rwtimeout = DEF_CTMO, DEF_RWTO |
180 | c2a03789 | Iustin Pop | else:
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181 | c2a03789 | Iustin Pop | self._ctimeout, self._rwtimeout = timeouts |
182 | c2a03789 | Iustin Pop | |
183 | c2a03789 | Iustin Pop | self.socket = None |
184 | c2a03789 | Iustin Pop | self._buffer = "" |
185 | c2a03789 | Iustin Pop | self._msgs = collections.deque()
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186 | c2a03789 | Iustin Pop | |
187 | c2a03789 | Iustin Pop | try:
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188 | c2a03789 | Iustin Pop | self.socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
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189 | cb462b06 | Michael Hanselmann | |
190 | cb462b06 | Michael Hanselmann | # Try to connect
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191 | c2a03789 | Iustin Pop | try:
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192 | cb462b06 | Michael Hanselmann | utils.Retry(self._Connect, 1.0, self._ctimeout, |
193 | cb462b06 | Michael Hanselmann | args=(self.socket, address, self._ctimeout)) |
194 | cb462b06 | Michael Hanselmann | except utils.RetryTimeout:
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195 | cb462b06 | Michael Hanselmann | raise TimeoutError("Connect timed out") |
196 | cb462b06 | Michael Hanselmann | |
197 | c2a03789 | Iustin Pop | self.socket.settimeout(self._rwtimeout) |
198 | 03a8dbdc | Iustin Pop | except (socket.error, NoMasterError):
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199 | c2a03789 | Iustin Pop | if self.socket is not None: |
200 | c2a03789 | Iustin Pop | self.socket.close()
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201 | c2a03789 | Iustin Pop | self.socket = None |
202 | c2a03789 | Iustin Pop | raise
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203 | c2a03789 | Iustin Pop | |
204 | cb462b06 | Michael Hanselmann | @staticmethod
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205 | cb462b06 | Michael Hanselmann | def _Connect(sock, address, timeout): |
206 | cb462b06 | Michael Hanselmann | sock.settimeout(timeout) |
207 | cb462b06 | Michael Hanselmann | try:
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208 | cb462b06 | Michael Hanselmann | sock.connect(address) |
209 | cb462b06 | Michael Hanselmann | except socket.timeout, err:
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210 | cb462b06 | Michael Hanselmann | raise TimeoutError("Connect timed out: %s" % str(err)) |
211 | cb462b06 | Michael Hanselmann | except socket.error, err:
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212 | 5a1c22fe | Iustin Pop | error_code = err.args[0]
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213 | 5a1c22fe | Iustin Pop | if error_code in (errno.ENOENT, errno.ECONNREFUSED): |
214 | cb462b06 | Michael Hanselmann | raise NoMasterError(address)
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215 | 5a1c22fe | Iustin Pop | elif error_code in (errno.EPERM, errno.EACCES): |
216 | 5a1c22fe | Iustin Pop | raise PermissionError(address)
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217 | 5a1c22fe | Iustin Pop | elif error_code == errno.EAGAIN:
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218 | cb462b06 | Michael Hanselmann | # Server's socket backlog is full at the moment
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219 | cb462b06 | Michael Hanselmann | raise utils.RetryAgain()
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220 | cb462b06 | Michael Hanselmann | raise
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221 | cb462b06 | Michael Hanselmann | |
222 | c2a03789 | Iustin Pop | def _CheckSocket(self): |
223 | c2a03789 | Iustin Pop | """Make sure we are connected.
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224 | c2a03789 | Iustin Pop |
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225 | c2a03789 | Iustin Pop | """
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226 | c2a03789 | Iustin Pop | if self.socket is None: |
227 | c2a03789 | Iustin Pop | raise ProtocolError("Connection is closed") |
228 | c2a03789 | Iustin Pop | |
229 | c2a03789 | Iustin Pop | def Send(self, msg): |
230 | c2a03789 | Iustin Pop | """Send a message.
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231 | c2a03789 | Iustin Pop |
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232 | c2a03789 | Iustin Pop | This just sends a message and doesn't wait for the response.
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233 | c2a03789 | Iustin Pop |
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234 | c2a03789 | Iustin Pop | """
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235 | 25942a6c | Guido Trotter | if constants.LUXI_EOM in msg: |
236 | 797506fc | Michael Hanselmann | raise ProtocolError("Message terminator found in payload") |
237 | 797506fc | Michael Hanselmann | |
238 | c2a03789 | Iustin Pop | self._CheckSocket()
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239 | c2a03789 | Iustin Pop | try:
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240 | 6096ee13 | Michael Hanselmann | # TODO: sendall is not guaranteed to send everything
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241 | 25942a6c | Guido Trotter | self.socket.sendall(msg + constants.LUXI_EOM)
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242 | c2a03789 | Iustin Pop | except socket.timeout, err:
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243 | c2a03789 | Iustin Pop | raise TimeoutError("Sending timeout: %s" % str(err)) |
244 | c2a03789 | Iustin Pop | |
245 | c2a03789 | Iustin Pop | def Recv(self): |
246 | 5bbd3f7f | Michael Hanselmann | """Try to receive a message from the socket.
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247 | c2a03789 | Iustin Pop |
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248 | c2a03789 | Iustin Pop | In case we already have messages queued, we just return from the
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249 | c2a03789 | Iustin Pop | queue. Otherwise, we try to read data with a _rwtimeout network
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250 | c2a03789 | Iustin Pop | timeout, and making sure we don't go over 2x_rwtimeout as a global
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251 | c2a03789 | Iustin Pop | limit.
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252 | c2a03789 | Iustin Pop |
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253 | c2a03789 | Iustin Pop | """
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254 | c2a03789 | Iustin Pop | self._CheckSocket()
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255 | c2a03789 | Iustin Pop | etime = time.time() + self._rwtimeout
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256 | c2a03789 | Iustin Pop | while not self._msgs: |
257 | c2a03789 | Iustin Pop | if time.time() > etime:
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258 | c2a03789 | Iustin Pop | raise TimeoutError("Extended receive timeout") |
259 | 6096ee13 | Michael Hanselmann | while True: |
260 | 6096ee13 | Michael Hanselmann | try:
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261 | 6096ee13 | Michael Hanselmann | data = self.socket.recv(4096) |
262 | 28e3e216 | Michael Hanselmann | except socket.timeout, err:
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263 | 28e3e216 | Michael Hanselmann | raise TimeoutError("Receive timeout: %s" % str(err)) |
264 | 6096ee13 | Michael Hanselmann | except socket.error, err:
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265 | 6096ee13 | Michael Hanselmann | if err.args and err.args[0] == errno.EAGAIN: |
266 | 6096ee13 | Michael Hanselmann | continue
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267 | 6096ee13 | Michael Hanselmann | raise
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268 | 6096ee13 | Michael Hanselmann | break
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269 | c2a03789 | Iustin Pop | if not data: |
270 | c2a03789 | Iustin Pop | raise ConnectionClosedError("Connection closed while reading") |
271 | 25942a6c | Guido Trotter | new_msgs = (self._buffer + data).split(constants.LUXI_EOM)
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272 | c2a03789 | Iustin Pop | self._buffer = new_msgs.pop()
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273 | c2a03789 | Iustin Pop | self._msgs.extend(new_msgs)
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274 | c2a03789 | Iustin Pop | return self._msgs.popleft() |
275 | c2a03789 | Iustin Pop | |
276 | c2a03789 | Iustin Pop | def Call(self, msg): |
277 | c2a03789 | Iustin Pop | """Send a message and wait for the response.
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278 | c2a03789 | Iustin Pop |
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279 | c2a03789 | Iustin Pop | This is just a wrapper over Send and Recv.
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280 | c2a03789 | Iustin Pop |
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281 | c2a03789 | Iustin Pop | """
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282 | c2a03789 | Iustin Pop | self.Send(msg)
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283 | c2a03789 | Iustin Pop | return self.Recv() |
284 | c2a03789 | Iustin Pop | |
285 | c2a03789 | Iustin Pop | def Close(self): |
286 | c2a03789 | Iustin Pop | """Close the socket"""
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287 | c2a03789 | Iustin Pop | if self.socket is not None: |
288 | c2a03789 | Iustin Pop | self.socket.close()
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289 | c2a03789 | Iustin Pop | self.socket = None |
290 | c2a03789 | Iustin Pop | |
291 | c2a03789 | Iustin Pop | |
292 | 231db3a5 | Michael Hanselmann | def ParseRequest(msg): |
293 | 231db3a5 | Michael Hanselmann | """Parses a LUXI request message.
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294 | 231db3a5 | Michael Hanselmann |
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295 | 231db3a5 | Michael Hanselmann | """
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296 | 231db3a5 | Michael Hanselmann | try:
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297 | 231db3a5 | Michael Hanselmann | request = serializer.LoadJson(msg) |
298 | 231db3a5 | Michael Hanselmann | except ValueError, err: |
299 | 231db3a5 | Michael Hanselmann | raise ProtocolError("Invalid LUXI request (parsing error): %s" % err) |
300 | 231db3a5 | Michael Hanselmann | |
301 | 231db3a5 | Michael Hanselmann | logging.debug("LUXI request: %s", request)
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302 | 231db3a5 | Michael Hanselmann | |
303 | 231db3a5 | Michael Hanselmann | if not isinstance(request, dict): |
304 | 231db3a5 | Michael Hanselmann | logging.error("LUXI request not a dict: %r", msg)
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305 | 231db3a5 | Michael Hanselmann | raise ProtocolError("Invalid LUXI request (not a dict)") |
306 | 231db3a5 | Michael Hanselmann | |
307 | b459a848 | Andrea Spadaccini | method = request.get(KEY_METHOD, None) # pylint: disable=E1103 |
308 | b459a848 | Andrea Spadaccini | args = request.get(KEY_ARGS, None) # pylint: disable=E1103 |
309 | b459a848 | Andrea Spadaccini | version = request.get(KEY_VERSION, None) # pylint: disable=E1103 |
310 | e7a25b08 | Guido Trotter | |
311 | 231db3a5 | Michael Hanselmann | if method is None or args is None: |
312 | 231db3a5 | Michael Hanselmann | logging.error("LUXI request missing method or arguments: %r", msg)
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313 | 231db3a5 | Michael Hanselmann | raise ProtocolError(("Invalid LUXI request (no method or arguments" |
314 | 231db3a5 | Michael Hanselmann | " in request): %r") % msg)
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315 | 231db3a5 | Michael Hanselmann | |
316 | e986f20c | Michael Hanselmann | return (method, args, version)
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317 | 231db3a5 | Michael Hanselmann | |
318 | 231db3a5 | Michael Hanselmann | |
319 | 231db3a5 | Michael Hanselmann | def ParseResponse(msg): |
320 | 231db3a5 | Michael Hanselmann | """Parses a LUXI response message.
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321 | 231db3a5 | Michael Hanselmann |
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322 | 231db3a5 | Michael Hanselmann | """
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323 | 231db3a5 | Michael Hanselmann | # Parse the result
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324 | 231db3a5 | Michael Hanselmann | try:
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325 | 231db3a5 | Michael Hanselmann | data = serializer.LoadJson(msg) |
326 | d143f2c6 | Iustin Pop | except KeyboardInterrupt: |
327 | d143f2c6 | Iustin Pop | raise
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328 | 231db3a5 | Michael Hanselmann | except Exception, err: |
329 | 231db3a5 | Michael Hanselmann | raise ProtocolError("Error while deserializing response: %s" % str(err)) |
330 | 231db3a5 | Michael Hanselmann | |
331 | 231db3a5 | Michael Hanselmann | # Validate response
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332 | 231db3a5 | Michael Hanselmann | if not (isinstance(data, dict) and |
333 | 231db3a5 | Michael Hanselmann | KEY_SUCCESS in data and |
334 | 231db3a5 | Michael Hanselmann | KEY_RESULT in data):
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335 | 231db3a5 | Michael Hanselmann | raise ProtocolError("Invalid response from server: %r" % data) |
336 | 231db3a5 | Michael Hanselmann | |
337 | 2317945a | Guido Trotter | return (data[KEY_SUCCESS], data[KEY_RESULT],
|
338 | b459a848 | Andrea Spadaccini | data.get(KEY_VERSION, None)) # pylint: disable=E1103 |
339 | 231db3a5 | Michael Hanselmann | |
340 | 231db3a5 | Michael Hanselmann | |
341 | e986f20c | Michael Hanselmann | def FormatResponse(success, result, version=None): |
342 | 231db3a5 | Michael Hanselmann | """Formats a LUXI response message.
|
343 | 231db3a5 | Michael Hanselmann |
|
344 | 231db3a5 | Michael Hanselmann | """
|
345 | 231db3a5 | Michael Hanselmann | response = { |
346 | 231db3a5 | Michael Hanselmann | KEY_SUCCESS: success, |
347 | 231db3a5 | Michael Hanselmann | KEY_RESULT: result, |
348 | 231db3a5 | Michael Hanselmann | } |
349 | 231db3a5 | Michael Hanselmann | |
350 | e986f20c | Michael Hanselmann | if version is not None: |
351 | e986f20c | Michael Hanselmann | response[KEY_VERSION] = version |
352 | e986f20c | Michael Hanselmann | |
353 | 231db3a5 | Michael Hanselmann | logging.debug("LUXI response: %s", response)
|
354 | 231db3a5 | Michael Hanselmann | |
355 | 231db3a5 | Michael Hanselmann | return serializer.DumpJson(response)
|
356 | 231db3a5 | Michael Hanselmann | |
357 | 231db3a5 | Michael Hanselmann | |
358 | e986f20c | Michael Hanselmann | def FormatRequest(method, args, version=None): |
359 | 231db3a5 | Michael Hanselmann | """Formats a LUXI request message.
|
360 | 231db3a5 | Michael Hanselmann |
|
361 | 231db3a5 | Michael Hanselmann | """
|
362 | 231db3a5 | Michael Hanselmann | # Build request
|
363 | 231db3a5 | Michael Hanselmann | request = { |
364 | 231db3a5 | Michael Hanselmann | KEY_METHOD: method, |
365 | 231db3a5 | Michael Hanselmann | KEY_ARGS: args, |
366 | 231db3a5 | Michael Hanselmann | } |
367 | 231db3a5 | Michael Hanselmann | |
368 | e986f20c | Michael Hanselmann | if version is not None: |
369 | e986f20c | Michael Hanselmann | request[KEY_VERSION] = version |
370 | e986f20c | Michael Hanselmann | |
371 | 231db3a5 | Michael Hanselmann | # Serialize the request
|
372 | a182a3ed | Michael Hanselmann | return serializer.DumpJson(request)
|
373 | 231db3a5 | Michael Hanselmann | |
374 | 231db3a5 | Michael Hanselmann | |
375 | e986f20c | Michael Hanselmann | def CallLuxiMethod(transport_cb, method, args, version=None): |
376 | 231db3a5 | Michael Hanselmann | """Send a LUXI request via a transport and return the response.
|
377 | 231db3a5 | Michael Hanselmann |
|
378 | 231db3a5 | Michael Hanselmann | """
|
379 | 231db3a5 | Michael Hanselmann | assert callable(transport_cb) |
380 | 231db3a5 | Michael Hanselmann | |
381 | e986f20c | Michael Hanselmann | request_msg = FormatRequest(method, args, version=version) |
382 | 231db3a5 | Michael Hanselmann | |
383 | 231db3a5 | Michael Hanselmann | # Send request and wait for response
|
384 | 231db3a5 | Michael Hanselmann | response_msg = transport_cb(request_msg) |
385 | 231db3a5 | Michael Hanselmann | |
386 | e986f20c | Michael Hanselmann | (success, result, resp_version) = ParseResponse(response_msg) |
387 | e986f20c | Michael Hanselmann | |
388 | e986f20c | Michael Hanselmann | # Verify version if there was one in the response
|
389 | e986f20c | Michael Hanselmann | if resp_version is not None and resp_version != version: |
390 | e986f20c | Michael Hanselmann | raise errors.LuxiError("LUXI version mismatch, client %s, response %s" % |
391 | e986f20c | Michael Hanselmann | (version, resp_version)) |
392 | 231db3a5 | Michael Hanselmann | |
393 | 231db3a5 | Michael Hanselmann | if success:
|
394 | 231db3a5 | Michael Hanselmann | return result
|
395 | 231db3a5 | Michael Hanselmann | |
396 | 231db3a5 | Michael Hanselmann | errors.MaybeRaise(result) |
397 | 231db3a5 | Michael Hanselmann | raise RequestError(result)
|
398 | 231db3a5 | Michael Hanselmann | |
399 | 231db3a5 | Michael Hanselmann | |
400 | c2a03789 | Iustin Pop | class Client(object): |
401 | c2a03789 | Iustin Pop | """High-level client implementation.
|
402 | c2a03789 | Iustin Pop |
|
403 | c2a03789 | Iustin Pop | This uses a backing Transport-like class on top of which it
|
404 | c2a03789 | Iustin Pop | implements data serialization/deserialization.
|
405 | c2a03789 | Iustin Pop |
|
406 | c2a03789 | Iustin Pop | """
|
407 | ceab32dd | Iustin Pop | def __init__(self, address=None, timeouts=None, transport=Transport): |
408 | c2a03789 | Iustin Pop | """Constructor for the Client class.
|
409 | c2a03789 | Iustin Pop |
|
410 | c2a03789 | Iustin Pop | Arguments:
|
411 | c2a03789 | Iustin Pop | - address: a valid address the the used transport class
|
412 | c2a03789 | Iustin Pop | - timeout: a list of timeouts, to be used on connect and read/write
|
413 | c2a03789 | Iustin Pop | - transport: a Transport-like class
|
414 | c2a03789 | Iustin Pop |
|
415 | c2a03789 | Iustin Pop |
|
416 | c2a03789 | Iustin Pop | If timeout is not passed, the default timeouts of the transport
|
417 | c2a03789 | Iustin Pop | class are used.
|
418 | c2a03789 | Iustin Pop |
|
419 | c2a03789 | Iustin Pop | """
|
420 | ceab32dd | Iustin Pop | if address is None: |
421 | b87ee98f | Michael Hanselmann | address = pathutils.MASTER_SOCKET |
422 | 8d5b316c | Iustin Pop | self.address = address
|
423 | 8d5b316c | Iustin Pop | self.timeouts = timeouts
|
424 | 8d5b316c | Iustin Pop | self.transport_class = transport
|
425 | 8d5b316c | Iustin Pop | self.transport = None |
426 | 8d5b316c | Iustin Pop | self._InitTransport()
|
427 | 8d5b316c | Iustin Pop | |
428 | 8d5b316c | Iustin Pop | def _InitTransport(self): |
429 | 8d5b316c | Iustin Pop | """(Re)initialize the transport if needed.
|
430 | 8d5b316c | Iustin Pop |
|
431 | 8d5b316c | Iustin Pop | """
|
432 | 8d5b316c | Iustin Pop | if self.transport is None: |
433 | 8d5b316c | Iustin Pop | self.transport = self.transport_class(self.address, |
434 | 8d5b316c | Iustin Pop | timeouts=self.timeouts)
|
435 | 8d5b316c | Iustin Pop | |
436 | 8d5b316c | Iustin Pop | def _CloseTransport(self): |
437 | 8d5b316c | Iustin Pop | """Close the transport, ignoring errors.
|
438 | 8d5b316c | Iustin Pop |
|
439 | 8d5b316c | Iustin Pop | """
|
440 | 8d5b316c | Iustin Pop | if self.transport is None: |
441 | 8d5b316c | Iustin Pop | return
|
442 | 8d5b316c | Iustin Pop | try:
|
443 | 8d5b316c | Iustin Pop | old_transp = self.transport
|
444 | 8d5b316c | Iustin Pop | self.transport = None |
445 | 8d5b316c | Iustin Pop | old_transp.Close() |
446 | b459a848 | Andrea Spadaccini | except Exception: # pylint: disable=W0703 |
447 | 8d5b316c | Iustin Pop | pass
|
448 | c2a03789 | Iustin Pop | |
449 | 231db3a5 | Michael Hanselmann | def _SendMethodCall(self, data): |
450 | 3d8548c4 | Michael Hanselmann | # Send request and wait for response
|
451 | 8d5b316c | Iustin Pop | try:
|
452 | 8d5b316c | Iustin Pop | self._InitTransport()
|
453 | 231db3a5 | Michael Hanselmann | return self.transport.Call(data) |
454 | 8d5b316c | Iustin Pop | except Exception: |
455 | 8d5b316c | Iustin Pop | self._CloseTransport()
|
456 | 8d5b316c | Iustin Pop | raise
|
457 | 8d5b316c | Iustin Pop | |
458 | 2a917701 | Michael Hanselmann | def Close(self): |
459 | 2a917701 | Michael Hanselmann | """Close the underlying connection.
|
460 | 2a917701 | Michael Hanselmann |
|
461 | 2a917701 | Michael Hanselmann | """
|
462 | 2a917701 | Michael Hanselmann | self._CloseTransport()
|
463 | 2a917701 | Michael Hanselmann | |
464 | 231db3a5 | Michael Hanselmann | def CallMethod(self, method, args): |
465 | 231db3a5 | Michael Hanselmann | """Send a generic request and return the response.
|
466 | 3d8548c4 | Michael Hanselmann |
|
467 | 231db3a5 | Michael Hanselmann | """
|
468 | a629ecb9 | Iustin Pop | if not isinstance(args, (list, tuple)): |
469 | a629ecb9 | Iustin Pop | raise errors.ProgrammerError("Invalid parameter passed to CallMethod:" |
470 | a629ecb9 | Iustin Pop | " expected list, got %s" % type(args)) |
471 | e986f20c | Michael Hanselmann | return CallLuxiMethod(self._SendMethodCall, method, args, |
472 | e986f20c | Michael Hanselmann | version=constants.LUXI_VERSION) |
473 | c2a03789 | Iustin Pop | |
474 | 3ccafd0e | Iustin Pop | def SetQueueDrainFlag(self, drain_flag): |
475 | 83c046a2 | Iustin Pop | return self.CallMethod(REQ_SET_DRAIN_FLAG, (drain_flag, )) |
476 | 3ccafd0e | Iustin Pop | |
477 | 05e50653 | Michael Hanselmann | def SetWatcherPause(self, until): |
478 | a629ecb9 | Iustin Pop | return self.CallMethod(REQ_SET_WATCHER_PAUSE, (until, )) |
479 | 05e50653 | Michael Hanselmann | |
480 | 0bbe448c | Michael Hanselmann | def SubmitJob(self, ops): |
481 | 0bbe448c | Michael Hanselmann | ops_state = map(lambda op: op.__getstate__(), ops) |
482 | 734a2a7c | René Nussbaumer | return self.CallMethod(REQ_SUBMIT_JOB, (ops_state, )) |
483 | 0bbe448c | Michael Hanselmann | |
484 | 2971c913 | Iustin Pop | def SubmitManyJobs(self, jobs): |
485 | 2971c913 | Iustin Pop | jobs_state = [] |
486 | 2971c913 | Iustin Pop | for ops in jobs: |
487 | 2971c913 | Iustin Pop | jobs_state.append([op.__getstate__() for op in ops]) |
488 | 734a2a7c | René Nussbaumer | return self.CallMethod(REQ_SUBMIT_MANY_JOBS, (jobs_state, )) |
489 | 2971c913 | Iustin Pop | |
490 | 0bbe448c | Michael Hanselmann | def CancelJob(self, job_id): |
491 | a629ecb9 | Iustin Pop | return self.CallMethod(REQ_CANCEL_JOB, (job_id, )) |
492 | 0bbe448c | Michael Hanselmann | |
493 | 0bbe448c | Michael Hanselmann | def ArchiveJob(self, job_id): |
494 | a629ecb9 | Iustin Pop | return self.CallMethod(REQ_ARCHIVE_JOB, (job_id, )) |
495 | 0bbe448c | Michael Hanselmann | |
496 | f63ffb37 | Michael Hanselmann | def ChangeJobPriority(self, job_id, priority): |
497 | f63ffb37 | Michael Hanselmann | return self.CallMethod(REQ_CHANGE_JOB_PRIORITY, (job_id, priority)) |
498 | f63ffb37 | Michael Hanselmann | |
499 | 07cd723a | Iustin Pop | def AutoArchiveJobs(self, age): |
500 | f8ad5591 | Michael Hanselmann | timeout = (DEF_RWTO - 1) / 2 |
501 | 83c046a2 | Iustin Pop | return self.CallMethod(REQ_AUTO_ARCHIVE_JOBS, (age, timeout)) |
502 | 07cd723a | Iustin Pop | |
503 | f4484122 | Michael Hanselmann | def WaitForJobChangeOnce(self, job_id, fields, |
504 | 793a8f7c | Michael Hanselmann | prev_job_info, prev_log_serial, |
505 | 793a8f7c | Michael Hanselmann | timeout=WFJC_TIMEOUT): |
506 | 793a8f7c | Michael Hanselmann | """Waits for changes on a job.
|
507 | 793a8f7c | Michael Hanselmann |
|
508 | 793a8f7c | Michael Hanselmann | @param job_id: Job ID
|
509 | 793a8f7c | Michael Hanselmann | @type fields: list
|
510 | 793a8f7c | Michael Hanselmann | @param fields: List of field names to be observed
|
511 | 793a8f7c | Michael Hanselmann | @type prev_job_info: None or list
|
512 | 793a8f7c | Michael Hanselmann | @param prev_job_info: Previously received job information
|
513 | 793a8f7c | Michael Hanselmann | @type prev_log_serial: None or int/long
|
514 | 793a8f7c | Michael Hanselmann | @param prev_log_serial: Highest log serial number previously received
|
515 | 793a8f7c | Michael Hanselmann | @type timeout: int/float
|
516 | 793a8f7c | Michael Hanselmann | @param timeout: Timeout in seconds (values larger than L{WFJC_TIMEOUT} will
|
517 | 793a8f7c | Michael Hanselmann | be capped to that value)
|
518 | 793a8f7c | Michael Hanselmann |
|
519 | 793a8f7c | Michael Hanselmann | """
|
520 | 793a8f7c | Michael Hanselmann | assert timeout >= 0, "Timeout can not be negative" |
521 | f4484122 | Michael Hanselmann | return self.CallMethod(REQ_WAIT_FOR_JOB_CHANGE, |
522 | f4484122 | Michael Hanselmann | (job_id, fields, prev_job_info, |
523 | 793a8f7c | Michael Hanselmann | prev_log_serial, |
524 | 793a8f7c | Michael Hanselmann | min(WFJC_TIMEOUT, timeout)))
|
525 | f4484122 | Michael Hanselmann | |
526 | f4484122 | Michael Hanselmann | def WaitForJobChange(self, job_id, fields, prev_job_info, prev_log_serial): |
527 | 5c735209 | Iustin Pop | while True: |
528 | f4484122 | Michael Hanselmann | result = self.WaitForJobChangeOnce(job_id, fields,
|
529 | f4484122 | Michael Hanselmann | prev_job_info, prev_log_serial) |
530 | 5c735209 | Iustin Pop | if result != constants.JOB_NOTCHANGED:
|
531 | 5c735209 | Iustin Pop | break
|
532 | 5c735209 | Iustin Pop | return result
|
533 | dfe57c22 | Michael Hanselmann | |
534 | 2e5c33db | Iustin Pop | def Query(self, what, fields, qfilter): |
535 | 28b71a76 | Michael Hanselmann | """Query for resources/items.
|
536 | 28b71a76 | Michael Hanselmann |
|
537 | abd66bf8 | Michael Hanselmann | @param what: One of L{constants.QR_VIA_LUXI}
|
538 | 28b71a76 | Michael Hanselmann | @type fields: List of strings
|
539 | 28b71a76 | Michael Hanselmann | @param fields: List of requested fields
|
540 | 2e5c33db | Iustin Pop | @type qfilter: None or list
|
541 | 2e5c33db | Iustin Pop | @param qfilter: Query filter
|
542 | 28b71a76 | Michael Hanselmann | @rtype: L{objects.QueryResponse}
|
543 | 28b71a76 | Michael Hanselmann |
|
544 | 28b71a76 | Michael Hanselmann | """
|
545 | a629ecb9 | Iustin Pop | result = self.CallMethod(REQ_QUERY, (what, fields, qfilter))
|
546 | 28b71a76 | Michael Hanselmann | return objects.QueryResponse.FromDict(result)
|
547 | 28b71a76 | Michael Hanselmann | |
548 | 28b71a76 | Michael Hanselmann | def QueryFields(self, what, fields): |
549 | 28b71a76 | Michael Hanselmann | """Query for available fields.
|
550 | 28b71a76 | Michael Hanselmann |
|
551 | abd66bf8 | Michael Hanselmann | @param what: One of L{constants.QR_VIA_LUXI}
|
552 | 28b71a76 | Michael Hanselmann | @type fields: None or list of strings
|
553 | 28b71a76 | Michael Hanselmann | @param fields: List of requested fields
|
554 | 28b71a76 | Michael Hanselmann | @rtype: L{objects.QueryFieldsResponse}
|
555 | 28b71a76 | Michael Hanselmann |
|
556 | 28b71a76 | Michael Hanselmann | """
|
557 | a629ecb9 | Iustin Pop | result = self.CallMethod(REQ_QUERY_FIELDS, (what, fields))
|
558 | 28b71a76 | Michael Hanselmann | return objects.QueryFieldsResponse.FromDict(result)
|
559 | 28b71a76 | Michael Hanselmann | |
560 | 0bbe448c | Michael Hanselmann | def QueryJobs(self, job_ids, fields): |
561 | 0bbe448c | Michael Hanselmann | return self.CallMethod(REQ_QUERY_JOBS, (job_ids, fields)) |
562 | 3d8548c4 | Michael Hanselmann | |
563 | ec79568d | Iustin Pop | def QueryInstances(self, names, fields, use_locking): |
564 | ec79568d | Iustin Pop | return self.CallMethod(REQ_QUERY_INSTANCES, (names, fields, use_locking)) |
565 | ee6c7b94 | Michael Hanselmann | |
566 | ec79568d | Iustin Pop | def QueryNodes(self, names, fields, use_locking): |
567 | ec79568d | Iustin Pop | return self.CallMethod(REQ_QUERY_NODES, (names, fields, use_locking)) |
568 | 02f7fe54 | Michael Hanselmann | |
569 | a79ef2a5 | Adeodato Simo | def QueryGroups(self, names, fields, use_locking): |
570 | a79ef2a5 | Adeodato Simo | return self.CallMethod(REQ_QUERY_GROUPS, (names, fields, use_locking)) |
571 | a79ef2a5 | Adeodato Simo | |
572 | 306bed0e | Apollon Oikonomopoulos | def QueryNetworks(self, names, fields, use_locking): |
573 | 306bed0e | Apollon Oikonomopoulos | return self.CallMethod(REQ_QUERY_NETWORKS, (names, fields, use_locking)) |
574 | 306bed0e | Apollon Oikonomopoulos | |
575 | ec79568d | Iustin Pop | def QueryExports(self, nodes, use_locking): |
576 | ec79568d | Iustin Pop | return self.CallMethod(REQ_QUERY_EXPORTS, (nodes, use_locking)) |
577 | 32f93223 | Michael Hanselmann | |
578 | 66baeccc | Iustin Pop | def QueryClusterInfo(self): |
579 | 66baeccc | Iustin Pop | return self.CallMethod(REQ_QUERY_CLUSTER_INFO, ()) |
580 | 66baeccc | Iustin Pop | |
581 | ae5849b5 | Michael Hanselmann | def QueryConfigValues(self, fields): |
582 | a629ecb9 | Iustin Pop | return self.CallMethod(REQ_QUERY_CONFIG_VALUES, (fields, )) |
583 | ae5849b5 | Michael Hanselmann | |
584 | 7699c3af | Iustin Pop | def QueryTags(self, kind, name): |
585 | 7699c3af | Iustin Pop | return self.CallMethod(REQ_QUERY_TAGS, (kind, name)) |