root / lib / luxi.py @ 0f945c65
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2 | c2a03789 | Iustin Pop | #
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3 | c2a03789 | Iustin Pop | |
4 | d143f2c6 | Iustin Pop | # Copyright (C) 2006, 2007, 2011 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 | 24d16f76 | Michael Hanselmann | import warnings |
38 | c2a03789 | Iustin Pop | |
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 | c2a03789 | Iustin Pop | |
45 | c2a03789 | Iustin Pop | |
46 | 231db3a5 | Michael Hanselmann | KEY_METHOD = "method"
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47 | 231db3a5 | Michael Hanselmann | KEY_ARGS = "args"
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48 | 3d8548c4 | Michael Hanselmann | KEY_SUCCESS = "success"
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49 | 3d8548c4 | Michael Hanselmann | KEY_RESULT = "result"
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50 | e986f20c | Michael Hanselmann | KEY_VERSION = "version"
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51 | 3d8548c4 | Michael Hanselmann | |
52 | 0bbe448c | Michael Hanselmann | REQ_SUBMIT_JOB = "SubmitJob"
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53 | 2971c913 | Iustin Pop | REQ_SUBMIT_MANY_JOBS = "SubmitManyJobs"
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54 | dfe57c22 | Michael Hanselmann | REQ_WAIT_FOR_JOB_CHANGE = "WaitForJobChange"
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55 | 0bbe448c | Michael Hanselmann | REQ_CANCEL_JOB = "CancelJob"
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56 | 0bbe448c | Michael Hanselmann | REQ_ARCHIVE_JOB = "ArchiveJob"
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57 | 07cd723a | Iustin Pop | REQ_AUTOARCHIVE_JOBS = "AutoArchiveJobs"
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58 | 28b71a76 | Michael Hanselmann | REQ_QUERY = "Query"
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59 | 28b71a76 | Michael Hanselmann | REQ_QUERY_FIELDS = "QueryFields"
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60 | 0bbe448c | Michael Hanselmann | REQ_QUERY_JOBS = "QueryJobs"
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61 | ee6c7b94 | Michael Hanselmann | REQ_QUERY_INSTANCES = "QueryInstances"
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62 | 02f7fe54 | Michael Hanselmann | REQ_QUERY_NODES = "QueryNodes"
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63 | a79ef2a5 | Adeodato Simo | REQ_QUERY_GROUPS = "QueryGroups"
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64 | 32f93223 | Michael Hanselmann | REQ_QUERY_EXPORTS = "QueryExports"
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65 | ae5849b5 | Michael Hanselmann | REQ_QUERY_CONFIG_VALUES = "QueryConfigValues"
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66 | 66baeccc | Iustin Pop | REQ_QUERY_CLUSTER_INFO = "QueryClusterInfo"
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67 | 7699c3af | Iustin Pop | REQ_QUERY_TAGS = "QueryTags"
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68 | 19b9ba9a | Michael Hanselmann | REQ_QUERY_LOCKS = "QueryLocks"
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69 | 3ccafd0e | Iustin Pop | REQ_QUEUE_SET_DRAIN_FLAG = "SetDrainFlag"
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70 | 05e50653 | Michael Hanselmann | REQ_SET_WATCHER_PAUSE = "SetWatcherPause"
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71 | c2a03789 | Iustin Pop | |
72 | c2a03789 | Iustin Pop | DEF_CTMO = 10
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73 | c2a03789 | Iustin Pop | DEF_RWTO = 60
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74 | c2a03789 | Iustin Pop | |
75 | 793a8f7c | Michael Hanselmann | # WaitForJobChange timeout
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76 | 793a8f7c | Michael Hanselmann | WFJC_TIMEOUT = (DEF_RWTO - 1) / 2 |
77 | 793a8f7c | Michael Hanselmann | |
78 | c2a03789 | Iustin Pop | |
79 | 7a8bda3f | Michael Hanselmann | class ProtocolError(errors.LuxiError): |
80 | 5a1c22fe | Iustin Pop | """Denotes an error in the LUXI protocol."""
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81 | c2a03789 | Iustin Pop | |
82 | c2a03789 | Iustin Pop | |
83 | c2a03789 | Iustin Pop | class ConnectionClosedError(ProtocolError): |
84 | 5a1c22fe | Iustin Pop | """Connection closed error."""
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85 | c2a03789 | Iustin Pop | |
86 | c2a03789 | Iustin Pop | |
87 | c2a03789 | Iustin Pop | class TimeoutError(ProtocolError): |
88 | 5a1c22fe | Iustin Pop | """Operation timeout error."""
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89 | c2a03789 | Iustin Pop | |
90 | c2a03789 | Iustin Pop | |
91 | b77acb3e | Iustin Pop | class RequestError(ProtocolError): |
92 | 5a1c22fe | Iustin Pop | """Error on request.
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93 | b77acb3e | Iustin Pop |
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94 | b77acb3e | Iustin Pop | This signifies an error in the request format or request handling,
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95 | b77acb3e | Iustin Pop | but not (e.g.) an error in starting up an instance.
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96 | b77acb3e | Iustin Pop |
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97 | b77acb3e | Iustin Pop | Some common conditions that can trigger this exception:
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98 | b77acb3e | Iustin Pop | - job submission failed because the job data was wrong
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99 | b77acb3e | Iustin Pop | - query failed because required fields were missing
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100 | b77acb3e | Iustin Pop |
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101 | b77acb3e | Iustin Pop | """
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102 | b77acb3e | Iustin Pop | |
103 | 3d8548c4 | Michael Hanselmann | |
104 | 03a8dbdc | Iustin Pop | class NoMasterError(ProtocolError): |
105 | 5a1c22fe | Iustin Pop | """The master cannot be reached.
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106 | 03a8dbdc | Iustin Pop |
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107 | 03a8dbdc | Iustin Pop | This means that the master daemon is not running or the socket has
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108 | 03a8dbdc | Iustin Pop | been removed.
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109 | 03a8dbdc | Iustin Pop |
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110 | 03a8dbdc | Iustin Pop | """
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111 | 03a8dbdc | Iustin Pop | |
112 | b77acb3e | Iustin Pop | |
113 | 5a1c22fe | Iustin Pop | class PermissionError(ProtocolError): |
114 | 5a1c22fe | Iustin Pop | """Permission denied while connecting to the master socket.
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115 | 5a1c22fe | Iustin Pop |
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116 | 5a1c22fe | Iustin Pop | This means the user doesn't have the proper rights.
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117 | 5a1c22fe | Iustin Pop |
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118 | 5a1c22fe | Iustin Pop | """
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119 | 5a1c22fe | Iustin Pop | |
120 | 5a1c22fe | Iustin Pop | |
121 | c2a03789 | Iustin Pop | class Transport: |
122 | c2a03789 | Iustin Pop | """Low-level transport class.
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123 | c2a03789 | Iustin Pop |
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124 | c2a03789 | Iustin Pop | This is used on the client side.
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125 | c2a03789 | Iustin Pop |
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126 | c2a03789 | Iustin Pop | This could be replace by any other class that provides the same
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127 | c2a03789 | Iustin Pop | semantics to the Client. This means:
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128 | c2a03789 | Iustin Pop | - can send messages and receive messages
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129 | c2a03789 | Iustin Pop | - safe for multithreading
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130 | c2a03789 | Iustin Pop |
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131 | c2a03789 | Iustin Pop | """
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132 | c2a03789 | Iustin Pop | |
133 | 25942a6c | Guido Trotter | def __init__(self, address, timeouts=None): |
134 | c2a03789 | Iustin Pop | """Constructor for the Client class.
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135 | c2a03789 | Iustin Pop |
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136 | c2a03789 | Iustin Pop | Arguments:
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137 | c2a03789 | Iustin Pop | - address: a valid address the the used transport class
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138 | c2a03789 | Iustin Pop | - timeout: a list of timeouts, to be used on connect and read/write
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139 | c2a03789 | Iustin Pop |
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140 | c2a03789 | Iustin Pop | There are two timeouts used since we might want to wait for a long
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141 | c2a03789 | Iustin Pop | time for a response, but the connect timeout should be lower.
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142 | c2a03789 | Iustin Pop |
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143 | c2a03789 | Iustin Pop | If not passed, we use a default of 10 and respectively 60 seconds.
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144 | c2a03789 | Iustin Pop |
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145 | c2a03789 | Iustin Pop | Note that on reading data, since the timeout applies to an
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146 | c2a03789 | Iustin Pop | invidual receive, it might be that the total duration is longer
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147 | c2a03789 | Iustin Pop | than timeout value passed (we make a hard limit at twice the read
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148 | c2a03789 | Iustin Pop | timeout).
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149 | c2a03789 | Iustin Pop |
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150 | c2a03789 | Iustin Pop | """
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151 | c2a03789 | Iustin Pop | self.address = address
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152 | c2a03789 | Iustin Pop | if timeouts is None: |
153 | c2a03789 | Iustin Pop | self._ctimeout, self._rwtimeout = DEF_CTMO, DEF_RWTO |
154 | c2a03789 | Iustin Pop | else:
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155 | c2a03789 | Iustin Pop | self._ctimeout, self._rwtimeout = timeouts |
156 | c2a03789 | Iustin Pop | |
157 | c2a03789 | Iustin Pop | self.socket = None |
158 | c2a03789 | Iustin Pop | self._buffer = "" |
159 | c2a03789 | Iustin Pop | self._msgs = collections.deque()
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160 | c2a03789 | Iustin Pop | |
161 | c2a03789 | Iustin Pop | try:
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162 | c2a03789 | Iustin Pop | self.socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
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163 | cb462b06 | Michael Hanselmann | |
164 | cb462b06 | Michael Hanselmann | # Try to connect
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165 | c2a03789 | Iustin Pop | try:
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166 | cb462b06 | Michael Hanselmann | utils.Retry(self._Connect, 1.0, self._ctimeout, |
167 | cb462b06 | Michael Hanselmann | args=(self.socket, address, self._ctimeout)) |
168 | cb462b06 | Michael Hanselmann | except utils.RetryTimeout:
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169 | cb462b06 | Michael Hanselmann | raise TimeoutError("Connect timed out") |
170 | cb462b06 | Michael Hanselmann | |
171 | c2a03789 | Iustin Pop | self.socket.settimeout(self._rwtimeout) |
172 | 03a8dbdc | Iustin Pop | except (socket.error, NoMasterError):
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173 | c2a03789 | Iustin Pop | if self.socket is not None: |
174 | c2a03789 | Iustin Pop | self.socket.close()
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175 | c2a03789 | Iustin Pop | self.socket = None |
176 | c2a03789 | Iustin Pop | raise
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177 | c2a03789 | Iustin Pop | |
178 | cb462b06 | Michael Hanselmann | @staticmethod
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179 | cb462b06 | Michael Hanselmann | def _Connect(sock, address, timeout): |
180 | cb462b06 | Michael Hanselmann | sock.settimeout(timeout) |
181 | cb462b06 | Michael Hanselmann | try:
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182 | cb462b06 | Michael Hanselmann | sock.connect(address) |
183 | cb462b06 | Michael Hanselmann | except socket.timeout, err:
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184 | cb462b06 | Michael Hanselmann | raise TimeoutError("Connect timed out: %s" % str(err)) |
185 | cb462b06 | Michael Hanselmann | except socket.error, err:
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186 | 5a1c22fe | Iustin Pop | error_code = err.args[0]
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187 | 5a1c22fe | Iustin Pop | if error_code in (errno.ENOENT, errno.ECONNREFUSED): |
188 | cb462b06 | Michael Hanselmann | raise NoMasterError(address)
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189 | 5a1c22fe | Iustin Pop | elif error_code in (errno.EPERM, errno.EACCES): |
190 | 5a1c22fe | Iustin Pop | raise PermissionError(address)
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191 | 5a1c22fe | Iustin Pop | elif error_code == errno.EAGAIN:
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192 | cb462b06 | Michael Hanselmann | # Server's socket backlog is full at the moment
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193 | cb462b06 | Michael Hanselmann | raise utils.RetryAgain()
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194 | cb462b06 | Michael Hanselmann | raise
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195 | cb462b06 | Michael Hanselmann | |
196 | c2a03789 | Iustin Pop | def _CheckSocket(self): |
197 | c2a03789 | Iustin Pop | """Make sure we are connected.
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198 | c2a03789 | Iustin Pop |
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199 | c2a03789 | Iustin Pop | """
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200 | c2a03789 | Iustin Pop | if self.socket is None: |
201 | c2a03789 | Iustin Pop | raise ProtocolError("Connection is closed") |
202 | c2a03789 | Iustin Pop | |
203 | c2a03789 | Iustin Pop | def Send(self, msg): |
204 | c2a03789 | Iustin Pop | """Send a message.
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205 | c2a03789 | Iustin Pop |
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206 | c2a03789 | Iustin Pop | This just sends a message and doesn't wait for the response.
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207 | c2a03789 | Iustin Pop |
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208 | c2a03789 | Iustin Pop | """
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209 | 25942a6c | Guido Trotter | if constants.LUXI_EOM in msg: |
210 | 797506fc | Michael Hanselmann | raise ProtocolError("Message terminator found in payload") |
211 | 797506fc | Michael Hanselmann | |
212 | c2a03789 | Iustin Pop | self._CheckSocket()
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213 | c2a03789 | Iustin Pop | try:
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214 | 6096ee13 | Michael Hanselmann | # TODO: sendall is not guaranteed to send everything
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215 | 25942a6c | Guido Trotter | self.socket.sendall(msg + constants.LUXI_EOM)
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216 | c2a03789 | Iustin Pop | except socket.timeout, err:
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217 | c2a03789 | Iustin Pop | raise TimeoutError("Sending timeout: %s" % str(err)) |
218 | c2a03789 | Iustin Pop | |
219 | c2a03789 | Iustin Pop | def Recv(self): |
220 | 5bbd3f7f | Michael Hanselmann | """Try to receive a message from the socket.
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221 | c2a03789 | Iustin Pop |
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222 | c2a03789 | Iustin Pop | In case we already have messages queued, we just return from the
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223 | c2a03789 | Iustin Pop | queue. Otherwise, we try to read data with a _rwtimeout network
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224 | c2a03789 | Iustin Pop | timeout, and making sure we don't go over 2x_rwtimeout as a global
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225 | c2a03789 | Iustin Pop | limit.
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226 | c2a03789 | Iustin Pop |
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227 | c2a03789 | Iustin Pop | """
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228 | c2a03789 | Iustin Pop | self._CheckSocket()
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229 | c2a03789 | Iustin Pop | etime = time.time() + self._rwtimeout
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230 | c2a03789 | Iustin Pop | while not self._msgs: |
231 | c2a03789 | Iustin Pop | if time.time() > etime:
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232 | c2a03789 | Iustin Pop | raise TimeoutError("Extended receive timeout") |
233 | 6096ee13 | Michael Hanselmann | while True: |
234 | 6096ee13 | Michael Hanselmann | try:
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235 | 6096ee13 | Michael Hanselmann | data = self.socket.recv(4096) |
236 | 28e3e216 | Michael Hanselmann | except socket.timeout, err:
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237 | 28e3e216 | Michael Hanselmann | raise TimeoutError("Receive timeout: %s" % str(err)) |
238 | 6096ee13 | Michael Hanselmann | except socket.error, err:
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239 | 6096ee13 | Michael Hanselmann | if err.args and err.args[0] == errno.EAGAIN: |
240 | 6096ee13 | Michael Hanselmann | continue
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241 | 6096ee13 | Michael Hanselmann | raise
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242 | 6096ee13 | Michael Hanselmann | break
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243 | c2a03789 | Iustin Pop | if not data: |
244 | c2a03789 | Iustin Pop | raise ConnectionClosedError("Connection closed while reading") |
245 | 25942a6c | Guido Trotter | new_msgs = (self._buffer + data).split(constants.LUXI_EOM)
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246 | c2a03789 | Iustin Pop | self._buffer = new_msgs.pop()
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247 | c2a03789 | Iustin Pop | self._msgs.extend(new_msgs)
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248 | c2a03789 | Iustin Pop | return self._msgs.popleft() |
249 | c2a03789 | Iustin Pop | |
250 | c2a03789 | Iustin Pop | def Call(self, msg): |
251 | c2a03789 | Iustin Pop | """Send a message and wait for the response.
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252 | c2a03789 | Iustin Pop |
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253 | c2a03789 | Iustin Pop | This is just a wrapper over Send and Recv.
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254 | c2a03789 | Iustin Pop |
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255 | c2a03789 | Iustin Pop | """
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256 | c2a03789 | Iustin Pop | self.Send(msg)
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257 | c2a03789 | Iustin Pop | return self.Recv() |
258 | c2a03789 | Iustin Pop | |
259 | c2a03789 | Iustin Pop | def Close(self): |
260 | c2a03789 | Iustin Pop | """Close the socket"""
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261 | c2a03789 | Iustin Pop | if self.socket is not None: |
262 | c2a03789 | Iustin Pop | self.socket.close()
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263 | c2a03789 | Iustin Pop | self.socket = None |
264 | c2a03789 | Iustin Pop | |
265 | c2a03789 | Iustin Pop | |
266 | 231db3a5 | Michael Hanselmann | def ParseRequest(msg): |
267 | 231db3a5 | Michael Hanselmann | """Parses a LUXI request message.
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268 | 231db3a5 | Michael Hanselmann |
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269 | 231db3a5 | Michael Hanselmann | """
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270 | 231db3a5 | Michael Hanselmann | try:
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271 | 231db3a5 | Michael Hanselmann | request = serializer.LoadJson(msg) |
272 | 231db3a5 | Michael Hanselmann | except ValueError, err: |
273 | 231db3a5 | Michael Hanselmann | raise ProtocolError("Invalid LUXI request (parsing error): %s" % err) |
274 | 231db3a5 | Michael Hanselmann | |
275 | 231db3a5 | Michael Hanselmann | logging.debug("LUXI request: %s", request)
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276 | 231db3a5 | Michael Hanselmann | |
277 | 231db3a5 | Michael Hanselmann | if not isinstance(request, dict): |
278 | 231db3a5 | Michael Hanselmann | logging.error("LUXI request not a dict: %r", msg)
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279 | 231db3a5 | Michael Hanselmann | raise ProtocolError("Invalid LUXI request (not a dict)") |
280 | 231db3a5 | Michael Hanselmann | |
281 | e7a25b08 | Guido Trotter | method = request.get(KEY_METHOD, None) # pylint: disable-msg=E1103 |
282 | e7a25b08 | Guido Trotter | args = request.get(KEY_ARGS, None) # pylint: disable-msg=E1103 |
283 | 2317945a | Guido Trotter | version = request.get(KEY_VERSION, None) # pylint: disable-msg=E1103 |
284 | e7a25b08 | Guido Trotter | |
285 | 231db3a5 | Michael Hanselmann | if method is None or args is None: |
286 | 231db3a5 | Michael Hanselmann | logging.error("LUXI request missing method or arguments: %r", msg)
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287 | 231db3a5 | Michael Hanselmann | raise ProtocolError(("Invalid LUXI request (no method or arguments" |
288 | 231db3a5 | Michael Hanselmann | " in request): %r") % msg)
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289 | 231db3a5 | Michael Hanselmann | |
290 | e986f20c | Michael Hanselmann | return (method, args, version)
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291 | 231db3a5 | Michael Hanselmann | |
292 | 231db3a5 | Michael Hanselmann | |
293 | 231db3a5 | Michael Hanselmann | def ParseResponse(msg): |
294 | 231db3a5 | Michael Hanselmann | """Parses a LUXI response message.
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295 | 231db3a5 | Michael Hanselmann |
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296 | 231db3a5 | Michael Hanselmann | """
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297 | 231db3a5 | Michael Hanselmann | # Parse the result
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298 | 231db3a5 | Michael Hanselmann | try:
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299 | 231db3a5 | Michael Hanselmann | data = serializer.LoadJson(msg) |
300 | d143f2c6 | Iustin Pop | except KeyboardInterrupt: |
301 | d143f2c6 | Iustin Pop | raise
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302 | 231db3a5 | Michael Hanselmann | except Exception, err: |
303 | 231db3a5 | Michael Hanselmann | raise ProtocolError("Error while deserializing response: %s" % str(err)) |
304 | 231db3a5 | Michael Hanselmann | |
305 | 231db3a5 | Michael Hanselmann | # Validate response
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306 | 231db3a5 | Michael Hanselmann | if not (isinstance(data, dict) and |
307 | 231db3a5 | Michael Hanselmann | KEY_SUCCESS in data and |
308 | 231db3a5 | Michael Hanselmann | KEY_RESULT in data):
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309 | 231db3a5 | Michael Hanselmann | raise ProtocolError("Invalid response from server: %r" % data) |
310 | 231db3a5 | Michael Hanselmann | |
311 | 2317945a | Guido Trotter | return (data[KEY_SUCCESS], data[KEY_RESULT],
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312 | 2317945a | Guido Trotter | data.get(KEY_VERSION, None)) # pylint: disable-msg=E1103 |
313 | 231db3a5 | Michael Hanselmann | |
314 | 231db3a5 | Michael Hanselmann | |
315 | e986f20c | Michael Hanselmann | def FormatResponse(success, result, version=None): |
316 | 231db3a5 | Michael Hanselmann | """Formats a LUXI response message.
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317 | 231db3a5 | Michael Hanselmann |
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318 | 231db3a5 | Michael Hanselmann | """
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319 | 231db3a5 | Michael Hanselmann | response = { |
320 | 231db3a5 | Michael Hanselmann | KEY_SUCCESS: success, |
321 | 231db3a5 | Michael Hanselmann | KEY_RESULT: result, |
322 | 231db3a5 | Michael Hanselmann | } |
323 | 231db3a5 | Michael Hanselmann | |
324 | e986f20c | Michael Hanselmann | if version is not None: |
325 | e986f20c | Michael Hanselmann | response[KEY_VERSION] = version |
326 | e986f20c | Michael Hanselmann | |
327 | 231db3a5 | Michael Hanselmann | logging.debug("LUXI response: %s", response)
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328 | 231db3a5 | Michael Hanselmann | |
329 | 231db3a5 | Michael Hanselmann | return serializer.DumpJson(response)
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330 | 231db3a5 | Michael Hanselmann | |
331 | 231db3a5 | Michael Hanselmann | |
332 | e986f20c | Michael Hanselmann | def FormatRequest(method, args, version=None): |
333 | 231db3a5 | Michael Hanselmann | """Formats a LUXI request message.
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334 | 231db3a5 | Michael Hanselmann |
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335 | 231db3a5 | Michael Hanselmann | """
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336 | 231db3a5 | Michael Hanselmann | # Build request
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337 | 231db3a5 | Michael Hanselmann | request = { |
338 | 231db3a5 | Michael Hanselmann | KEY_METHOD: method, |
339 | 231db3a5 | Michael Hanselmann | KEY_ARGS: args, |
340 | 231db3a5 | Michael Hanselmann | } |
341 | 231db3a5 | Michael Hanselmann | |
342 | e986f20c | Michael Hanselmann | if version is not None: |
343 | e986f20c | Michael Hanselmann | request[KEY_VERSION] = version |
344 | e986f20c | Michael Hanselmann | |
345 | 231db3a5 | Michael Hanselmann | # Serialize the request
|
346 | 231db3a5 | Michael Hanselmann | return serializer.DumpJson(request, indent=False) |
347 | 231db3a5 | Michael Hanselmann | |
348 | 231db3a5 | Michael Hanselmann | |
349 | e986f20c | Michael Hanselmann | def CallLuxiMethod(transport_cb, method, args, version=None): |
350 | 231db3a5 | Michael Hanselmann | """Send a LUXI request via a transport and return the response.
|
351 | 231db3a5 | Michael Hanselmann |
|
352 | 231db3a5 | Michael Hanselmann | """
|
353 | 231db3a5 | Michael Hanselmann | assert callable(transport_cb) |
354 | 231db3a5 | Michael Hanselmann | |
355 | e986f20c | Michael Hanselmann | request_msg = FormatRequest(method, args, version=version) |
356 | 231db3a5 | Michael Hanselmann | |
357 | 231db3a5 | Michael Hanselmann | # Send request and wait for response
|
358 | 231db3a5 | Michael Hanselmann | response_msg = transport_cb(request_msg) |
359 | 231db3a5 | Michael Hanselmann | |
360 | e986f20c | Michael Hanselmann | (success, result, resp_version) = ParseResponse(response_msg) |
361 | e986f20c | Michael Hanselmann | |
362 | e986f20c | Michael Hanselmann | # Verify version if there was one in the response
|
363 | e986f20c | Michael Hanselmann | if resp_version is not None and resp_version != version: |
364 | e986f20c | Michael Hanselmann | raise errors.LuxiError("LUXI version mismatch, client %s, response %s" % |
365 | e986f20c | Michael Hanselmann | (version, resp_version)) |
366 | 231db3a5 | Michael Hanselmann | |
367 | 231db3a5 | Michael Hanselmann | if success:
|
368 | 231db3a5 | Michael Hanselmann | return result
|
369 | 231db3a5 | Michael Hanselmann | |
370 | 231db3a5 | Michael Hanselmann | errors.MaybeRaise(result) |
371 | 231db3a5 | Michael Hanselmann | raise RequestError(result)
|
372 | 231db3a5 | Michael Hanselmann | |
373 | 231db3a5 | Michael Hanselmann | |
374 | c2a03789 | Iustin Pop | class Client(object): |
375 | c2a03789 | Iustin Pop | """High-level client implementation.
|
376 | c2a03789 | Iustin Pop |
|
377 | c2a03789 | Iustin Pop | This uses a backing Transport-like class on top of which it
|
378 | c2a03789 | Iustin Pop | implements data serialization/deserialization.
|
379 | c2a03789 | Iustin Pop |
|
380 | c2a03789 | Iustin Pop | """
|
381 | ceab32dd | Iustin Pop | def __init__(self, address=None, timeouts=None, transport=Transport): |
382 | c2a03789 | Iustin Pop | """Constructor for the Client class.
|
383 | c2a03789 | Iustin Pop |
|
384 | c2a03789 | Iustin Pop | Arguments:
|
385 | c2a03789 | Iustin Pop | - address: a valid address the the used transport class
|
386 | c2a03789 | Iustin Pop | - timeout: a list of timeouts, to be used on connect and read/write
|
387 | c2a03789 | Iustin Pop | - transport: a Transport-like class
|
388 | c2a03789 | Iustin Pop |
|
389 | c2a03789 | Iustin Pop |
|
390 | c2a03789 | Iustin Pop | If timeout is not passed, the default timeouts of the transport
|
391 | c2a03789 | Iustin Pop | class are used.
|
392 | c2a03789 | Iustin Pop |
|
393 | c2a03789 | Iustin Pop | """
|
394 | ceab32dd | Iustin Pop | if address is None: |
395 | ceab32dd | Iustin Pop | address = constants.MASTER_SOCKET |
396 | 8d5b316c | Iustin Pop | self.address = address
|
397 | 8d5b316c | Iustin Pop | self.timeouts = timeouts
|
398 | 8d5b316c | Iustin Pop | self.transport_class = transport
|
399 | 8d5b316c | Iustin Pop | self.transport = None |
400 | 8d5b316c | Iustin Pop | self._InitTransport()
|
401 | 8d5b316c | Iustin Pop | |
402 | 8d5b316c | Iustin Pop | def _InitTransport(self): |
403 | 8d5b316c | Iustin Pop | """(Re)initialize the transport if needed.
|
404 | 8d5b316c | Iustin Pop |
|
405 | 8d5b316c | Iustin Pop | """
|
406 | 8d5b316c | Iustin Pop | if self.transport is None: |
407 | 8d5b316c | Iustin Pop | self.transport = self.transport_class(self.address, |
408 | 8d5b316c | Iustin Pop | timeouts=self.timeouts)
|
409 | 8d5b316c | Iustin Pop | |
410 | 8d5b316c | Iustin Pop | def _CloseTransport(self): |
411 | 8d5b316c | Iustin Pop | """Close the transport, ignoring errors.
|
412 | 8d5b316c | Iustin Pop |
|
413 | 8d5b316c | Iustin Pop | """
|
414 | 8d5b316c | Iustin Pop | if self.transport is None: |
415 | 8d5b316c | Iustin Pop | return
|
416 | 8d5b316c | Iustin Pop | try:
|
417 | 8d5b316c | Iustin Pop | old_transp = self.transport
|
418 | 8d5b316c | Iustin Pop | self.transport = None |
419 | 8d5b316c | Iustin Pop | old_transp.Close() |
420 | 7260cfbe | Iustin Pop | except Exception: # pylint: disable-msg=W0703 |
421 | 8d5b316c | Iustin Pop | pass
|
422 | c2a03789 | Iustin Pop | |
423 | 231db3a5 | Michael Hanselmann | def _SendMethodCall(self, data): |
424 | 3d8548c4 | Michael Hanselmann | # Send request and wait for response
|
425 | 8d5b316c | Iustin Pop | try:
|
426 | 8d5b316c | Iustin Pop | self._InitTransport()
|
427 | 231db3a5 | Michael Hanselmann | return self.transport.Call(data) |
428 | 8d5b316c | Iustin Pop | except Exception: |
429 | 8d5b316c | Iustin Pop | self._CloseTransport()
|
430 | 8d5b316c | Iustin Pop | raise
|
431 | 8d5b316c | Iustin Pop | |
432 | 2a917701 | Michael Hanselmann | def Close(self): |
433 | 2a917701 | Michael Hanselmann | """Close the underlying connection.
|
434 | 2a917701 | Michael Hanselmann |
|
435 | 2a917701 | Michael Hanselmann | """
|
436 | 2a917701 | Michael Hanselmann | self._CloseTransport()
|
437 | 2a917701 | Michael Hanselmann | |
438 | 231db3a5 | Michael Hanselmann | def CallMethod(self, method, args): |
439 | 231db3a5 | Michael Hanselmann | """Send a generic request and return the response.
|
440 | 3d8548c4 | Michael Hanselmann |
|
441 | 231db3a5 | Michael Hanselmann | """
|
442 | e986f20c | Michael Hanselmann | return CallLuxiMethod(self._SendMethodCall, method, args, |
443 | e986f20c | Michael Hanselmann | version=constants.LUXI_VERSION) |
444 | c2a03789 | Iustin Pop | |
445 | 3ccafd0e | Iustin Pop | def SetQueueDrainFlag(self, drain_flag): |
446 | 3ccafd0e | Iustin Pop | return self.CallMethod(REQ_QUEUE_SET_DRAIN_FLAG, drain_flag) |
447 | 3ccafd0e | Iustin Pop | |
448 | 05e50653 | Michael Hanselmann | def SetWatcherPause(self, until): |
449 | 05e50653 | Michael Hanselmann | return self.CallMethod(REQ_SET_WATCHER_PAUSE, [until]) |
450 | 05e50653 | Michael Hanselmann | |
451 | 0bbe448c | Michael Hanselmann | def SubmitJob(self, ops): |
452 | 0bbe448c | Michael Hanselmann | ops_state = map(lambda op: op.__getstate__(), ops) |
453 | 0bbe448c | Michael Hanselmann | return self.CallMethod(REQ_SUBMIT_JOB, ops_state) |
454 | 0bbe448c | Michael Hanselmann | |
455 | 2971c913 | Iustin Pop | def SubmitManyJobs(self, jobs): |
456 | 2971c913 | Iustin Pop | jobs_state = [] |
457 | 2971c913 | Iustin Pop | for ops in jobs: |
458 | 2971c913 | Iustin Pop | jobs_state.append([op.__getstate__() for op in ops]) |
459 | 2971c913 | Iustin Pop | return self.CallMethod(REQ_SUBMIT_MANY_JOBS, jobs_state) |
460 | 2971c913 | Iustin Pop | |
461 | 0bbe448c | Michael Hanselmann | def CancelJob(self, job_id): |
462 | 0bbe448c | Michael Hanselmann | return self.CallMethod(REQ_CANCEL_JOB, job_id) |
463 | 0bbe448c | Michael Hanselmann | |
464 | 0bbe448c | Michael Hanselmann | def ArchiveJob(self, job_id): |
465 | 0bbe448c | Michael Hanselmann | return self.CallMethod(REQ_ARCHIVE_JOB, job_id) |
466 | 0bbe448c | Michael Hanselmann | |
467 | 07cd723a | Iustin Pop | def AutoArchiveJobs(self, age): |
468 | f8ad5591 | Michael Hanselmann | timeout = (DEF_RWTO - 1) / 2 |
469 | f8ad5591 | Michael Hanselmann | return self.CallMethod(REQ_AUTOARCHIVE_JOBS, (age, timeout)) |
470 | 07cd723a | Iustin Pop | |
471 | f4484122 | Michael Hanselmann | def WaitForJobChangeOnce(self, job_id, fields, |
472 | 793a8f7c | Michael Hanselmann | prev_job_info, prev_log_serial, |
473 | 793a8f7c | Michael Hanselmann | timeout=WFJC_TIMEOUT): |
474 | 793a8f7c | Michael Hanselmann | """Waits for changes on a job.
|
475 | 793a8f7c | Michael Hanselmann |
|
476 | 793a8f7c | Michael Hanselmann | @param job_id: Job ID
|
477 | 793a8f7c | Michael Hanselmann | @type fields: list
|
478 | 793a8f7c | Michael Hanselmann | @param fields: List of field names to be observed
|
479 | 793a8f7c | Michael Hanselmann | @type prev_job_info: None or list
|
480 | 793a8f7c | Michael Hanselmann | @param prev_job_info: Previously received job information
|
481 | 793a8f7c | Michael Hanselmann | @type prev_log_serial: None or int/long
|
482 | 793a8f7c | Michael Hanselmann | @param prev_log_serial: Highest log serial number previously received
|
483 | 793a8f7c | Michael Hanselmann | @type timeout: int/float
|
484 | 793a8f7c | Michael Hanselmann | @param timeout: Timeout in seconds (values larger than L{WFJC_TIMEOUT} will
|
485 | 793a8f7c | Michael Hanselmann | be capped to that value)
|
486 | 793a8f7c | Michael Hanselmann |
|
487 | 793a8f7c | Michael Hanselmann | """
|
488 | 793a8f7c | Michael Hanselmann | assert timeout >= 0, "Timeout can not be negative" |
489 | f4484122 | Michael Hanselmann | return self.CallMethod(REQ_WAIT_FOR_JOB_CHANGE, |
490 | f4484122 | Michael Hanselmann | (job_id, fields, prev_job_info, |
491 | 793a8f7c | Michael Hanselmann | prev_log_serial, |
492 | 793a8f7c | Michael Hanselmann | min(WFJC_TIMEOUT, timeout)))
|
493 | f4484122 | Michael Hanselmann | |
494 | f4484122 | Michael Hanselmann | def WaitForJobChange(self, job_id, fields, prev_job_info, prev_log_serial): |
495 | 5c735209 | Iustin Pop | while True: |
496 | f4484122 | Michael Hanselmann | result = self.WaitForJobChangeOnce(job_id, fields,
|
497 | f4484122 | Michael Hanselmann | prev_job_info, prev_log_serial) |
498 | 5c735209 | Iustin Pop | if result != constants.JOB_NOTCHANGED:
|
499 | 5c735209 | Iustin Pop | break
|
500 | 5c735209 | Iustin Pop | return result
|
501 | dfe57c22 | Michael Hanselmann | |
502 | 28b71a76 | Michael Hanselmann | def Query(self, what, fields, filter_): |
503 | 28b71a76 | Michael Hanselmann | """Query for resources/items.
|
504 | 28b71a76 | Michael Hanselmann |
|
505 | abd66bf8 | Michael Hanselmann | @param what: One of L{constants.QR_VIA_LUXI}
|
506 | 28b71a76 | Michael Hanselmann | @type fields: List of strings
|
507 | 28b71a76 | Michael Hanselmann | @param fields: List of requested fields
|
508 | 28b71a76 | Michael Hanselmann | @type filter_: None or list
|
509 | 28b71a76 | Michael Hanselmann | @param filter_: Query filter
|
510 | 28b71a76 | Michael Hanselmann | @rtype: L{objects.QueryResponse}
|
511 | 28b71a76 | Michael Hanselmann |
|
512 | 28b71a76 | Michael Hanselmann | """
|
513 | 28b71a76 | Michael Hanselmann | req = objects.QueryRequest(what=what, fields=fields, filter=filter_) |
514 | 28b71a76 | Michael Hanselmann | result = self.CallMethod(REQ_QUERY, req.ToDict())
|
515 | 28b71a76 | Michael Hanselmann | return objects.QueryResponse.FromDict(result)
|
516 | 28b71a76 | Michael Hanselmann | |
517 | 28b71a76 | Michael Hanselmann | def QueryFields(self, what, fields): |
518 | 28b71a76 | Michael Hanselmann | """Query for available fields.
|
519 | 28b71a76 | Michael Hanselmann |
|
520 | abd66bf8 | Michael Hanselmann | @param what: One of L{constants.QR_VIA_LUXI}
|
521 | 28b71a76 | Michael Hanselmann | @type fields: None or list of strings
|
522 | 28b71a76 | Michael Hanselmann | @param fields: List of requested fields
|
523 | 28b71a76 | Michael Hanselmann | @rtype: L{objects.QueryFieldsResponse}
|
524 | 28b71a76 | Michael Hanselmann |
|
525 | 28b71a76 | Michael Hanselmann | """
|
526 | 28b71a76 | Michael Hanselmann | req = objects.QueryFieldsRequest(what=what, fields=fields) |
527 | 28b71a76 | Michael Hanselmann | result = self.CallMethod(REQ_QUERY_FIELDS, req.ToDict())
|
528 | 28b71a76 | Michael Hanselmann | return objects.QueryFieldsResponse.FromDict(result)
|
529 | 28b71a76 | Michael Hanselmann | |
530 | 0bbe448c | Michael Hanselmann | def QueryJobs(self, job_ids, fields): |
531 | 0bbe448c | Michael Hanselmann | return self.CallMethod(REQ_QUERY_JOBS, (job_ids, fields)) |
532 | 3d8548c4 | Michael Hanselmann | |
533 | ec79568d | Iustin Pop | def QueryInstances(self, names, fields, use_locking): |
534 | ec79568d | Iustin Pop | return self.CallMethod(REQ_QUERY_INSTANCES, (names, fields, use_locking)) |
535 | ee6c7b94 | Michael Hanselmann | |
536 | ec79568d | Iustin Pop | def QueryNodes(self, names, fields, use_locking): |
537 | ec79568d | Iustin Pop | return self.CallMethod(REQ_QUERY_NODES, (names, fields, use_locking)) |
538 | 02f7fe54 | Michael Hanselmann | |
539 | a79ef2a5 | Adeodato Simo | def QueryGroups(self, names, fields, use_locking): |
540 | a79ef2a5 | Adeodato Simo | return self.CallMethod(REQ_QUERY_GROUPS, (names, fields, use_locking)) |
541 | a79ef2a5 | Adeodato Simo | |
542 | ec79568d | Iustin Pop | def QueryExports(self, nodes, use_locking): |
543 | ec79568d | Iustin Pop | return self.CallMethod(REQ_QUERY_EXPORTS, (nodes, use_locking)) |
544 | 32f93223 | Michael Hanselmann | |
545 | 66baeccc | Iustin Pop | def QueryClusterInfo(self): |
546 | 66baeccc | Iustin Pop | return self.CallMethod(REQ_QUERY_CLUSTER_INFO, ()) |
547 | 66baeccc | Iustin Pop | |
548 | ae5849b5 | Michael Hanselmann | def QueryConfigValues(self, fields): |
549 | ae5849b5 | Michael Hanselmann | return self.CallMethod(REQ_QUERY_CONFIG_VALUES, fields) |
550 | ae5849b5 | Michael Hanselmann | |
551 | 7699c3af | Iustin Pop | def QueryTags(self, kind, name): |
552 | 7699c3af | Iustin Pop | return self.CallMethod(REQ_QUERY_TAGS, (kind, name)) |
553 | 19b9ba9a | Michael Hanselmann | |
554 | 19b9ba9a | Michael Hanselmann | def QueryLocks(self, fields, sync): |
555 | 24d16f76 | Michael Hanselmann | warnings.warn("This LUXI call is deprecated and will be removed, use"
|
556 | 24d16f76 | Michael Hanselmann | " Query(\"%s\", ...) instead" % constants.QR_LOCK)
|
557 | 19b9ba9a | Michael Hanselmann | return self.CallMethod(REQ_QUERY_LOCKS, (fields, sync)) |