root / lib / luxi.py @ 26d3fd2f
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2 | c2a03789 | Iustin Pop | #
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3 | c2a03789 | Iustin Pop | |
4 | c2a03789 | Iustin Pop | # Copyright (C) 2006, 2007 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 | fad50141 | Michael Hanselmann | from ganeti import serializer |
39 | ceab32dd | Iustin Pop | from ganeti import constants |
40 | 6797ec29 | Iustin Pop | from ganeti import errors |
41 | cb462b06 | Michael Hanselmann | from ganeti import utils |
42 | c2a03789 | Iustin Pop | |
43 | c2a03789 | Iustin Pop | |
44 | 231db3a5 | Michael Hanselmann | KEY_METHOD = "method"
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45 | 231db3a5 | Michael Hanselmann | KEY_ARGS = "args"
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46 | 3d8548c4 | Michael Hanselmann | KEY_SUCCESS = "success"
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47 | 3d8548c4 | Michael Hanselmann | KEY_RESULT = "result"
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48 | 3d8548c4 | Michael Hanselmann | |
49 | 0bbe448c | Michael Hanselmann | REQ_SUBMIT_JOB = "SubmitJob"
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50 | 2971c913 | Iustin Pop | REQ_SUBMIT_MANY_JOBS = "SubmitManyJobs"
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51 | dfe57c22 | Michael Hanselmann | REQ_WAIT_FOR_JOB_CHANGE = "WaitForJobChange"
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52 | 0bbe448c | Michael Hanselmann | REQ_CANCEL_JOB = "CancelJob"
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53 | 0bbe448c | Michael Hanselmann | REQ_ARCHIVE_JOB = "ArchiveJob"
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54 | 07cd723a | Iustin Pop | REQ_AUTOARCHIVE_JOBS = "AutoArchiveJobs"
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55 | 0bbe448c | Michael Hanselmann | REQ_QUERY_JOBS = "QueryJobs"
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56 | ee6c7b94 | Michael Hanselmann | REQ_QUERY_INSTANCES = "QueryInstances"
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57 | 02f7fe54 | Michael Hanselmann | REQ_QUERY_NODES = "QueryNodes"
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58 | 32f93223 | Michael Hanselmann | REQ_QUERY_EXPORTS = "QueryExports"
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59 | ae5849b5 | Michael Hanselmann | REQ_QUERY_CONFIG_VALUES = "QueryConfigValues"
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60 | 66baeccc | Iustin Pop | REQ_QUERY_CLUSTER_INFO = "QueryClusterInfo"
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61 | 7699c3af | Iustin Pop | REQ_QUERY_TAGS = "QueryTags"
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62 | 19b9ba9a | Michael Hanselmann | REQ_QUERY_LOCKS = "QueryLocks"
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63 | 3ccafd0e | Iustin Pop | REQ_QUEUE_SET_DRAIN_FLAG = "SetDrainFlag"
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64 | 05e50653 | Michael Hanselmann | REQ_SET_WATCHER_PAUSE = "SetWatcherPause"
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65 | c2a03789 | Iustin Pop | |
66 | c2a03789 | Iustin Pop | DEF_CTMO = 10
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67 | c2a03789 | Iustin Pop | DEF_RWTO = 60
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68 | c2a03789 | Iustin Pop | |
69 | 793a8f7c | Michael Hanselmann | # WaitForJobChange timeout
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70 | 793a8f7c | Michael Hanselmann | WFJC_TIMEOUT = (DEF_RWTO - 1) / 2 |
71 | 793a8f7c | Michael Hanselmann | |
72 | c2a03789 | Iustin Pop | |
73 | 797506fc | Michael Hanselmann | class ProtocolError(errors.GenericError): |
74 | 5a1c22fe | Iustin Pop | """Denotes an error in the LUXI protocol."""
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75 | c2a03789 | Iustin Pop | |
76 | c2a03789 | Iustin Pop | |
77 | c2a03789 | Iustin Pop | class ConnectionClosedError(ProtocolError): |
78 | 5a1c22fe | Iustin Pop | """Connection closed error."""
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79 | c2a03789 | Iustin Pop | |
80 | c2a03789 | Iustin Pop | |
81 | c2a03789 | Iustin Pop | class TimeoutError(ProtocolError): |
82 | 5a1c22fe | Iustin Pop | """Operation timeout error."""
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83 | c2a03789 | Iustin Pop | |
84 | c2a03789 | Iustin Pop | |
85 | b77acb3e | Iustin Pop | class RequestError(ProtocolError): |
86 | 5a1c22fe | Iustin Pop | """Error on request.
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87 | b77acb3e | Iustin Pop |
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88 | b77acb3e | Iustin Pop | This signifies an error in the request format or request handling,
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89 | b77acb3e | Iustin Pop | but not (e.g.) an error in starting up an instance.
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90 | b77acb3e | Iustin Pop |
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91 | b77acb3e | Iustin Pop | Some common conditions that can trigger this exception:
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92 | b77acb3e | Iustin Pop | - job submission failed because the job data was wrong
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93 | b77acb3e | Iustin Pop | - query failed because required fields were missing
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94 | b77acb3e | Iustin Pop |
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95 | b77acb3e | Iustin Pop | """
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96 | b77acb3e | Iustin Pop | |
97 | 3d8548c4 | Michael Hanselmann | |
98 | 03a8dbdc | Iustin Pop | class NoMasterError(ProtocolError): |
99 | 5a1c22fe | Iustin Pop | """The master cannot be reached.
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100 | 03a8dbdc | Iustin Pop |
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101 | 03a8dbdc | Iustin Pop | This means that the master daemon is not running or the socket has
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102 | 03a8dbdc | Iustin Pop | been removed.
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103 | 03a8dbdc | Iustin Pop |
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104 | 03a8dbdc | Iustin Pop | """
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105 | 03a8dbdc | Iustin Pop | |
106 | b77acb3e | Iustin Pop | |
107 | 5a1c22fe | Iustin Pop | class PermissionError(ProtocolError): |
108 | 5a1c22fe | Iustin Pop | """Permission denied while connecting to the master socket.
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109 | 5a1c22fe | Iustin Pop |
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110 | 5a1c22fe | Iustin Pop | This means the user doesn't have the proper rights.
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111 | 5a1c22fe | Iustin Pop |
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112 | 5a1c22fe | Iustin Pop | """
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113 | 5a1c22fe | Iustin Pop | |
114 | 5a1c22fe | Iustin Pop | |
115 | c2a03789 | Iustin Pop | class Transport: |
116 | c2a03789 | Iustin Pop | """Low-level transport class.
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117 | c2a03789 | Iustin Pop |
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118 | c2a03789 | Iustin Pop | This is used on the client side.
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119 | c2a03789 | Iustin Pop |
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120 | c2a03789 | Iustin Pop | This could be replace by any other class that provides the same
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121 | c2a03789 | Iustin Pop | semantics to the Client. This means:
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122 | c2a03789 | Iustin Pop | - can send messages and receive messages
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123 | c2a03789 | Iustin Pop | - safe for multithreading
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124 | c2a03789 | Iustin Pop |
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125 | c2a03789 | Iustin Pop | """
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126 | c2a03789 | Iustin Pop | |
127 | 25942a6c | Guido Trotter | def __init__(self, address, timeouts=None): |
128 | c2a03789 | Iustin Pop | """Constructor for the Client class.
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129 | c2a03789 | Iustin Pop |
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130 | c2a03789 | Iustin Pop | Arguments:
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131 | c2a03789 | Iustin Pop | - address: a valid address the the used transport class
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132 | c2a03789 | Iustin Pop | - timeout: a list of timeouts, to be used on connect and read/write
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133 | c2a03789 | Iustin Pop |
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134 | c2a03789 | Iustin Pop | There are two timeouts used since we might want to wait for a long
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135 | c2a03789 | Iustin Pop | time for a response, but the connect timeout should be lower.
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136 | c2a03789 | Iustin Pop |
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137 | c2a03789 | Iustin Pop | If not passed, we use a default of 10 and respectively 60 seconds.
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138 | c2a03789 | Iustin Pop |
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139 | c2a03789 | Iustin Pop | Note that on reading data, since the timeout applies to an
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140 | c2a03789 | Iustin Pop | invidual receive, it might be that the total duration is longer
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141 | c2a03789 | Iustin Pop | than timeout value passed (we make a hard limit at twice the read
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142 | c2a03789 | Iustin Pop | timeout).
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143 | c2a03789 | Iustin Pop |
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144 | c2a03789 | Iustin Pop | """
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145 | c2a03789 | Iustin Pop | self.address = address
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146 | c2a03789 | Iustin Pop | if timeouts is None: |
147 | c2a03789 | Iustin Pop | self._ctimeout, self._rwtimeout = DEF_CTMO, DEF_RWTO |
148 | c2a03789 | Iustin Pop | else:
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149 | c2a03789 | Iustin Pop | self._ctimeout, self._rwtimeout = timeouts |
150 | c2a03789 | Iustin Pop | |
151 | c2a03789 | Iustin Pop | self.socket = None |
152 | c2a03789 | Iustin Pop | self._buffer = "" |
153 | c2a03789 | Iustin Pop | self._msgs = collections.deque()
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154 | c2a03789 | Iustin Pop | |
155 | c2a03789 | Iustin Pop | try:
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156 | c2a03789 | Iustin Pop | self.socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
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157 | cb462b06 | Michael Hanselmann | |
158 | cb462b06 | Michael Hanselmann | # Try to connect
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159 | c2a03789 | Iustin Pop | try:
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160 | cb462b06 | Michael Hanselmann | utils.Retry(self._Connect, 1.0, self._ctimeout, |
161 | cb462b06 | Michael Hanselmann | args=(self.socket, address, self._ctimeout)) |
162 | cb462b06 | Michael Hanselmann | except utils.RetryTimeout:
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163 | cb462b06 | Michael Hanselmann | raise TimeoutError("Connect timed out") |
164 | cb462b06 | Michael Hanselmann | |
165 | c2a03789 | Iustin Pop | self.socket.settimeout(self._rwtimeout) |
166 | 03a8dbdc | Iustin Pop | except (socket.error, NoMasterError):
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167 | c2a03789 | Iustin Pop | if self.socket is not None: |
168 | c2a03789 | Iustin Pop | self.socket.close()
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169 | c2a03789 | Iustin Pop | self.socket = None |
170 | c2a03789 | Iustin Pop | raise
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171 | c2a03789 | Iustin Pop | |
172 | cb462b06 | Michael Hanselmann | @staticmethod
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173 | cb462b06 | Michael Hanselmann | def _Connect(sock, address, timeout): |
174 | cb462b06 | Michael Hanselmann | sock.settimeout(timeout) |
175 | cb462b06 | Michael Hanselmann | try:
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176 | cb462b06 | Michael Hanselmann | sock.connect(address) |
177 | cb462b06 | Michael Hanselmann | except socket.timeout, err:
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178 | cb462b06 | Michael Hanselmann | raise TimeoutError("Connect timed out: %s" % str(err)) |
179 | cb462b06 | Michael Hanselmann | except socket.error, err:
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180 | 5a1c22fe | Iustin Pop | error_code = err.args[0]
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181 | 5a1c22fe | Iustin Pop | if error_code in (errno.ENOENT, errno.ECONNREFUSED): |
182 | cb462b06 | Michael Hanselmann | raise NoMasterError(address)
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183 | 5a1c22fe | Iustin Pop | elif error_code in (errno.EPERM, errno.EACCES): |
184 | 5a1c22fe | Iustin Pop | raise PermissionError(address)
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185 | 5a1c22fe | Iustin Pop | elif error_code == errno.EAGAIN:
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186 | cb462b06 | Michael Hanselmann | # Server's socket backlog is full at the moment
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187 | cb462b06 | Michael Hanselmann | raise utils.RetryAgain()
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188 | cb462b06 | Michael Hanselmann | raise
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189 | cb462b06 | Michael Hanselmann | |
190 | c2a03789 | Iustin Pop | def _CheckSocket(self): |
191 | c2a03789 | Iustin Pop | """Make sure we are connected.
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192 | c2a03789 | Iustin Pop |
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193 | c2a03789 | Iustin Pop | """
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194 | c2a03789 | Iustin Pop | if self.socket is None: |
195 | c2a03789 | Iustin Pop | raise ProtocolError("Connection is closed") |
196 | c2a03789 | Iustin Pop | |
197 | c2a03789 | Iustin Pop | def Send(self, msg): |
198 | c2a03789 | Iustin Pop | """Send a message.
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199 | c2a03789 | Iustin Pop |
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200 | c2a03789 | Iustin Pop | This just sends a message and doesn't wait for the response.
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201 | c2a03789 | Iustin Pop |
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202 | c2a03789 | Iustin Pop | """
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203 | 25942a6c | Guido Trotter | if constants.LUXI_EOM in msg: |
204 | 797506fc | Michael Hanselmann | raise ProtocolError("Message terminator found in payload") |
205 | 797506fc | Michael Hanselmann | |
206 | c2a03789 | Iustin Pop | self._CheckSocket()
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207 | c2a03789 | Iustin Pop | try:
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208 | 6096ee13 | Michael Hanselmann | # TODO: sendall is not guaranteed to send everything
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209 | 25942a6c | Guido Trotter | self.socket.sendall(msg + constants.LUXI_EOM)
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210 | c2a03789 | Iustin Pop | except socket.timeout, err:
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211 | c2a03789 | Iustin Pop | raise TimeoutError("Sending timeout: %s" % str(err)) |
212 | c2a03789 | Iustin Pop | |
213 | c2a03789 | Iustin Pop | def Recv(self): |
214 | 5bbd3f7f | Michael Hanselmann | """Try to receive a message from the socket.
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215 | c2a03789 | Iustin Pop |
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216 | c2a03789 | Iustin Pop | In case we already have messages queued, we just return from the
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217 | c2a03789 | Iustin Pop | queue. Otherwise, we try to read data with a _rwtimeout network
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218 | c2a03789 | Iustin Pop | timeout, and making sure we don't go over 2x_rwtimeout as a global
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219 | c2a03789 | Iustin Pop | limit.
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220 | c2a03789 | Iustin Pop |
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221 | c2a03789 | Iustin Pop | """
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222 | c2a03789 | Iustin Pop | self._CheckSocket()
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223 | c2a03789 | Iustin Pop | etime = time.time() + self._rwtimeout
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224 | c2a03789 | Iustin Pop | while not self._msgs: |
225 | c2a03789 | Iustin Pop | if time.time() > etime:
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226 | c2a03789 | Iustin Pop | raise TimeoutError("Extended receive timeout") |
227 | 6096ee13 | Michael Hanselmann | while True: |
228 | 6096ee13 | Michael Hanselmann | try:
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229 | 6096ee13 | Michael Hanselmann | data = self.socket.recv(4096) |
230 | 6096ee13 | Michael Hanselmann | except socket.error, err:
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231 | 6096ee13 | Michael Hanselmann | if err.args and err.args[0] == errno.EAGAIN: |
232 | 6096ee13 | Michael Hanselmann | continue
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233 | 6096ee13 | Michael Hanselmann | raise
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234 | 6096ee13 | Michael Hanselmann | except socket.timeout, err:
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235 | 6096ee13 | Michael Hanselmann | raise TimeoutError("Receive timeout: %s" % str(err)) |
236 | 6096ee13 | Michael Hanselmann | break
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237 | c2a03789 | Iustin Pop | if not data: |
238 | c2a03789 | Iustin Pop | raise ConnectionClosedError("Connection closed while reading") |
239 | 25942a6c | Guido Trotter | new_msgs = (self._buffer + data).split(constants.LUXI_EOM)
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240 | c2a03789 | Iustin Pop | self._buffer = new_msgs.pop()
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241 | c2a03789 | Iustin Pop | self._msgs.extend(new_msgs)
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242 | c2a03789 | Iustin Pop | return self._msgs.popleft() |
243 | c2a03789 | Iustin Pop | |
244 | c2a03789 | Iustin Pop | def Call(self, msg): |
245 | c2a03789 | Iustin Pop | """Send a message and wait for the response.
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246 | c2a03789 | Iustin Pop |
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247 | c2a03789 | Iustin Pop | This is just a wrapper over Send and Recv.
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248 | c2a03789 | Iustin Pop |
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249 | c2a03789 | Iustin Pop | """
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250 | c2a03789 | Iustin Pop | self.Send(msg)
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251 | c2a03789 | Iustin Pop | return self.Recv() |
252 | c2a03789 | Iustin Pop | |
253 | c2a03789 | Iustin Pop | def Close(self): |
254 | c2a03789 | Iustin Pop | """Close the socket"""
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255 | c2a03789 | Iustin Pop | if self.socket is not None: |
256 | c2a03789 | Iustin Pop | self.socket.close()
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257 | c2a03789 | Iustin Pop | self.socket = None |
258 | c2a03789 | Iustin Pop | |
259 | c2a03789 | Iustin Pop | |
260 | 231db3a5 | Michael Hanselmann | def ParseRequest(msg): |
261 | 231db3a5 | Michael Hanselmann | """Parses a LUXI request message.
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262 | 231db3a5 | Michael Hanselmann |
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263 | 231db3a5 | Michael Hanselmann | """
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264 | 231db3a5 | Michael Hanselmann | try:
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265 | 231db3a5 | Michael Hanselmann | request = serializer.LoadJson(msg) |
266 | 231db3a5 | Michael Hanselmann | except ValueError, err: |
267 | 231db3a5 | Michael Hanselmann | raise ProtocolError("Invalid LUXI request (parsing error): %s" % err) |
268 | 231db3a5 | Michael Hanselmann | |
269 | 231db3a5 | Michael Hanselmann | logging.debug("LUXI request: %s", request)
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270 | 231db3a5 | Michael Hanselmann | |
271 | 231db3a5 | Michael Hanselmann | if not isinstance(request, dict): |
272 | 231db3a5 | Michael Hanselmann | logging.error("LUXI request not a dict: %r", msg)
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273 | 231db3a5 | Michael Hanselmann | raise ProtocolError("Invalid LUXI request (not a dict)") |
274 | 231db3a5 | Michael Hanselmann | |
275 | e7a25b08 | Guido Trotter | method = request.get(KEY_METHOD, None) # pylint: disable-msg=E1103 |
276 | e7a25b08 | Guido Trotter | args = request.get(KEY_ARGS, None) # pylint: disable-msg=E1103 |
277 | e7a25b08 | Guido Trotter | |
278 | 231db3a5 | Michael Hanselmann | if method is None or args is None: |
279 | 231db3a5 | Michael Hanselmann | logging.error("LUXI request missing method or arguments: %r", msg)
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280 | 231db3a5 | Michael Hanselmann | raise ProtocolError(("Invalid LUXI request (no method or arguments" |
281 | 231db3a5 | Michael Hanselmann | " in request): %r") % msg)
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282 | 231db3a5 | Michael Hanselmann | |
283 | 231db3a5 | Michael Hanselmann | return (method, args)
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284 | 231db3a5 | Michael Hanselmann | |
285 | 231db3a5 | Michael Hanselmann | |
286 | 231db3a5 | Michael Hanselmann | def ParseResponse(msg): |
287 | 231db3a5 | Michael Hanselmann | """Parses a LUXI response message.
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288 | 231db3a5 | Michael Hanselmann |
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289 | 231db3a5 | Michael Hanselmann | """
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290 | 231db3a5 | Michael Hanselmann | # Parse the result
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291 | 231db3a5 | Michael Hanselmann | try:
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292 | 231db3a5 | Michael Hanselmann | data = serializer.LoadJson(msg) |
293 | 231db3a5 | Michael Hanselmann | except Exception, err: |
294 | 231db3a5 | Michael Hanselmann | raise ProtocolError("Error while deserializing response: %s" % str(err)) |
295 | 231db3a5 | Michael Hanselmann | |
296 | 231db3a5 | Michael Hanselmann | # Validate response
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297 | 231db3a5 | Michael Hanselmann | if not (isinstance(data, dict) and |
298 | 231db3a5 | Michael Hanselmann | KEY_SUCCESS in data and |
299 | 231db3a5 | Michael Hanselmann | KEY_RESULT in data):
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300 | 231db3a5 | Michael Hanselmann | raise ProtocolError("Invalid response from server: %r" % data) |
301 | 231db3a5 | Michael Hanselmann | |
302 | 231db3a5 | Michael Hanselmann | return (data[KEY_SUCCESS], data[KEY_RESULT])
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303 | 231db3a5 | Michael Hanselmann | |
304 | 231db3a5 | Michael Hanselmann | |
305 | 231db3a5 | Michael Hanselmann | def FormatResponse(success, result): |
306 | 231db3a5 | Michael Hanselmann | """Formats a LUXI response message.
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307 | 231db3a5 | Michael Hanselmann |
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308 | 231db3a5 | Michael Hanselmann | """
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309 | 231db3a5 | Michael Hanselmann | response = { |
310 | 231db3a5 | Michael Hanselmann | KEY_SUCCESS: success, |
311 | 231db3a5 | Michael Hanselmann | KEY_RESULT: result, |
312 | 231db3a5 | Michael Hanselmann | } |
313 | 231db3a5 | Michael Hanselmann | |
314 | 231db3a5 | Michael Hanselmann | logging.debug("LUXI response: %s", response)
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315 | 231db3a5 | Michael Hanselmann | |
316 | 231db3a5 | Michael Hanselmann | return serializer.DumpJson(response)
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317 | 231db3a5 | Michael Hanselmann | |
318 | 231db3a5 | Michael Hanselmann | |
319 | 231db3a5 | Michael Hanselmann | def FormatRequest(method, args): |
320 | 231db3a5 | Michael Hanselmann | """Formats a LUXI request 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 | # Build request
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324 | 231db3a5 | Michael Hanselmann | request = { |
325 | 231db3a5 | Michael Hanselmann | KEY_METHOD: method, |
326 | 231db3a5 | Michael Hanselmann | KEY_ARGS: args, |
327 | 231db3a5 | Michael Hanselmann | } |
328 | 231db3a5 | Michael Hanselmann | |
329 | 231db3a5 | Michael Hanselmann | # Serialize the request
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330 | 231db3a5 | Michael Hanselmann | return serializer.DumpJson(request, indent=False) |
331 | 231db3a5 | Michael Hanselmann | |
332 | 231db3a5 | Michael Hanselmann | |
333 | 231db3a5 | Michael Hanselmann | def CallLuxiMethod(transport_cb, method, args): |
334 | 231db3a5 | Michael Hanselmann | """Send a LUXI request via a transport and return the response.
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335 | 231db3a5 | Michael Hanselmann |
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336 | 231db3a5 | Michael Hanselmann | """
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337 | 231db3a5 | Michael Hanselmann | assert callable(transport_cb) |
338 | 231db3a5 | Michael Hanselmann | |
339 | 231db3a5 | Michael Hanselmann | request_msg = FormatRequest(method, args) |
340 | 231db3a5 | Michael Hanselmann | |
341 | 231db3a5 | Michael Hanselmann | # Send request and wait for response
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342 | 231db3a5 | Michael Hanselmann | response_msg = transport_cb(request_msg) |
343 | 231db3a5 | Michael Hanselmann | |
344 | 231db3a5 | Michael Hanselmann | (success, result) = ParseResponse(response_msg) |
345 | 231db3a5 | Michael Hanselmann | |
346 | 231db3a5 | Michael Hanselmann | if success:
|
347 | 231db3a5 | Michael Hanselmann | return result
|
348 | 231db3a5 | Michael Hanselmann | |
349 | 231db3a5 | Michael Hanselmann | errors.MaybeRaise(result) |
350 | 231db3a5 | Michael Hanselmann | raise RequestError(result)
|
351 | 231db3a5 | Michael Hanselmann | |
352 | 231db3a5 | Michael Hanselmann | |
353 | c2a03789 | Iustin Pop | class Client(object): |
354 | c2a03789 | Iustin Pop | """High-level client implementation.
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355 | c2a03789 | Iustin Pop |
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356 | c2a03789 | Iustin Pop | This uses a backing Transport-like class on top of which it
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357 | c2a03789 | Iustin Pop | implements data serialization/deserialization.
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358 | c2a03789 | Iustin Pop |
|
359 | c2a03789 | Iustin Pop | """
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360 | ceab32dd | Iustin Pop | def __init__(self, address=None, timeouts=None, transport=Transport): |
361 | c2a03789 | Iustin Pop | """Constructor for the Client class.
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362 | c2a03789 | Iustin Pop |
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363 | c2a03789 | Iustin Pop | Arguments:
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364 | c2a03789 | Iustin Pop | - address: a valid address the the used transport class
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365 | c2a03789 | Iustin Pop | - timeout: a list of timeouts, to be used on connect and read/write
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366 | c2a03789 | Iustin Pop | - transport: a Transport-like class
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367 | c2a03789 | Iustin Pop |
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368 | c2a03789 | Iustin Pop |
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369 | c2a03789 | Iustin Pop | If timeout is not passed, the default timeouts of the transport
|
370 | c2a03789 | Iustin Pop | class are used.
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371 | c2a03789 | Iustin Pop |
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372 | c2a03789 | Iustin Pop | """
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373 | ceab32dd | Iustin Pop | if address is None: |
374 | ceab32dd | Iustin Pop | address = constants.MASTER_SOCKET |
375 | 8d5b316c | Iustin Pop | self.address = address
|
376 | 8d5b316c | Iustin Pop | self.timeouts = timeouts
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377 | 8d5b316c | Iustin Pop | self.transport_class = transport
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378 | 8d5b316c | Iustin Pop | self.transport = None |
379 | 8d5b316c | Iustin Pop | self._InitTransport()
|
380 | 8d5b316c | Iustin Pop | |
381 | 8d5b316c | Iustin Pop | def _InitTransport(self): |
382 | 8d5b316c | Iustin Pop | """(Re)initialize the transport if needed.
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383 | 8d5b316c | Iustin Pop |
|
384 | 8d5b316c | Iustin Pop | """
|
385 | 8d5b316c | Iustin Pop | if self.transport is None: |
386 | 8d5b316c | Iustin Pop | self.transport = self.transport_class(self.address, |
387 | 8d5b316c | Iustin Pop | timeouts=self.timeouts)
|
388 | 8d5b316c | Iustin Pop | |
389 | 8d5b316c | Iustin Pop | def _CloseTransport(self): |
390 | 8d5b316c | Iustin Pop | """Close the transport, ignoring errors.
|
391 | 8d5b316c | Iustin Pop |
|
392 | 8d5b316c | Iustin Pop | """
|
393 | 8d5b316c | Iustin Pop | if self.transport is None: |
394 | 8d5b316c | Iustin Pop | return
|
395 | 8d5b316c | Iustin Pop | try:
|
396 | 8d5b316c | Iustin Pop | old_transp = self.transport
|
397 | 8d5b316c | Iustin Pop | self.transport = None |
398 | 8d5b316c | Iustin Pop | old_transp.Close() |
399 | 7260cfbe | Iustin Pop | except Exception: # pylint: disable-msg=W0703 |
400 | 8d5b316c | Iustin Pop | pass
|
401 | c2a03789 | Iustin Pop | |
402 | 231db3a5 | Michael Hanselmann | def _SendMethodCall(self, data): |
403 | 3d8548c4 | Michael Hanselmann | # Send request and wait for response
|
404 | 8d5b316c | Iustin Pop | try:
|
405 | 8d5b316c | Iustin Pop | self._InitTransport()
|
406 | 231db3a5 | Michael Hanselmann | return self.transport.Call(data) |
407 | 8d5b316c | Iustin Pop | except Exception: |
408 | 8d5b316c | Iustin Pop | self._CloseTransport()
|
409 | 8d5b316c | Iustin Pop | raise
|
410 | 8d5b316c | Iustin Pop | |
411 | 231db3a5 | Michael Hanselmann | def CallMethod(self, method, args): |
412 | 231db3a5 | Michael Hanselmann | """Send a generic request and return the response.
|
413 | 3d8548c4 | Michael Hanselmann |
|
414 | 231db3a5 | Michael Hanselmann | """
|
415 | 231db3a5 | Michael Hanselmann | return CallLuxiMethod(self._SendMethodCall, method, args) |
416 | c2a03789 | Iustin Pop | |
417 | 3ccafd0e | Iustin Pop | def SetQueueDrainFlag(self, drain_flag): |
418 | 3ccafd0e | Iustin Pop | return self.CallMethod(REQ_QUEUE_SET_DRAIN_FLAG, drain_flag) |
419 | 3ccafd0e | Iustin Pop | |
420 | 05e50653 | Michael Hanselmann | def SetWatcherPause(self, until): |
421 | 05e50653 | Michael Hanselmann | return self.CallMethod(REQ_SET_WATCHER_PAUSE, [until]) |
422 | 05e50653 | Michael Hanselmann | |
423 | 0bbe448c | Michael Hanselmann | def SubmitJob(self, ops): |
424 | 0bbe448c | Michael Hanselmann | ops_state = map(lambda op: op.__getstate__(), ops) |
425 | 0bbe448c | Michael Hanselmann | return self.CallMethod(REQ_SUBMIT_JOB, ops_state) |
426 | 0bbe448c | Michael Hanselmann | |
427 | 2971c913 | Iustin Pop | def SubmitManyJobs(self, jobs): |
428 | 2971c913 | Iustin Pop | jobs_state = [] |
429 | 2971c913 | Iustin Pop | for ops in jobs: |
430 | 2971c913 | Iustin Pop | jobs_state.append([op.__getstate__() for op in ops]) |
431 | 2971c913 | Iustin Pop | return self.CallMethod(REQ_SUBMIT_MANY_JOBS, jobs_state) |
432 | 2971c913 | Iustin Pop | |
433 | 0bbe448c | Michael Hanselmann | def CancelJob(self, job_id): |
434 | 0bbe448c | Michael Hanselmann | return self.CallMethod(REQ_CANCEL_JOB, job_id) |
435 | 0bbe448c | Michael Hanselmann | |
436 | 0bbe448c | Michael Hanselmann | def ArchiveJob(self, job_id): |
437 | 0bbe448c | Michael Hanselmann | return self.CallMethod(REQ_ARCHIVE_JOB, job_id) |
438 | 0bbe448c | Michael Hanselmann | |
439 | 07cd723a | Iustin Pop | def AutoArchiveJobs(self, age): |
440 | f8ad5591 | Michael Hanselmann | timeout = (DEF_RWTO - 1) / 2 |
441 | f8ad5591 | Michael Hanselmann | return self.CallMethod(REQ_AUTOARCHIVE_JOBS, (age, timeout)) |
442 | 07cd723a | Iustin Pop | |
443 | f4484122 | Michael Hanselmann | def WaitForJobChangeOnce(self, job_id, fields, |
444 | 793a8f7c | Michael Hanselmann | prev_job_info, prev_log_serial, |
445 | 793a8f7c | Michael Hanselmann | timeout=WFJC_TIMEOUT): |
446 | 793a8f7c | Michael Hanselmann | """Waits for changes on a job.
|
447 | 793a8f7c | Michael Hanselmann |
|
448 | 793a8f7c | Michael Hanselmann | @param job_id: Job ID
|
449 | 793a8f7c | Michael Hanselmann | @type fields: list
|
450 | 793a8f7c | Michael Hanselmann | @param fields: List of field names to be observed
|
451 | 793a8f7c | Michael Hanselmann | @type prev_job_info: None or list
|
452 | 793a8f7c | Michael Hanselmann | @param prev_job_info: Previously received job information
|
453 | 793a8f7c | Michael Hanselmann | @type prev_log_serial: None or int/long
|
454 | 793a8f7c | Michael Hanselmann | @param prev_log_serial: Highest log serial number previously received
|
455 | 793a8f7c | Michael Hanselmann | @type timeout: int/float
|
456 | 793a8f7c | Michael Hanselmann | @param timeout: Timeout in seconds (values larger than L{WFJC_TIMEOUT} will
|
457 | 793a8f7c | Michael Hanselmann | be capped to that value)
|
458 | 793a8f7c | Michael Hanselmann |
|
459 | 793a8f7c | Michael Hanselmann | """
|
460 | 793a8f7c | Michael Hanselmann | assert timeout >= 0, "Timeout can not be negative" |
461 | f4484122 | Michael Hanselmann | return self.CallMethod(REQ_WAIT_FOR_JOB_CHANGE, |
462 | f4484122 | Michael Hanselmann | (job_id, fields, prev_job_info, |
463 | 793a8f7c | Michael Hanselmann | prev_log_serial, |
464 | 793a8f7c | Michael Hanselmann | min(WFJC_TIMEOUT, timeout)))
|
465 | f4484122 | Michael Hanselmann | |
466 | f4484122 | Michael Hanselmann | def WaitForJobChange(self, job_id, fields, prev_job_info, prev_log_serial): |
467 | 5c735209 | Iustin Pop | while True: |
468 | f4484122 | Michael Hanselmann | result = self.WaitForJobChangeOnce(job_id, fields,
|
469 | f4484122 | Michael Hanselmann | prev_job_info, prev_log_serial) |
470 | 5c735209 | Iustin Pop | if result != constants.JOB_NOTCHANGED:
|
471 | 5c735209 | Iustin Pop | break
|
472 | 5c735209 | Iustin Pop | return result
|
473 | dfe57c22 | Michael Hanselmann | |
474 | 0bbe448c | Michael Hanselmann | def QueryJobs(self, job_ids, fields): |
475 | 0bbe448c | Michael Hanselmann | return self.CallMethod(REQ_QUERY_JOBS, (job_ids, fields)) |
476 | 3d8548c4 | Michael Hanselmann | |
477 | ec79568d | Iustin Pop | def QueryInstances(self, names, fields, use_locking): |
478 | ec79568d | Iustin Pop | return self.CallMethod(REQ_QUERY_INSTANCES, (names, fields, use_locking)) |
479 | ee6c7b94 | Michael Hanselmann | |
480 | ec79568d | Iustin Pop | def QueryNodes(self, names, fields, use_locking): |
481 | ec79568d | Iustin Pop | return self.CallMethod(REQ_QUERY_NODES, (names, fields, use_locking)) |
482 | 02f7fe54 | Michael Hanselmann | |
483 | ec79568d | Iustin Pop | def QueryExports(self, nodes, use_locking): |
484 | ec79568d | Iustin Pop | return self.CallMethod(REQ_QUERY_EXPORTS, (nodes, use_locking)) |
485 | 32f93223 | Michael Hanselmann | |
486 | 66baeccc | Iustin Pop | def QueryClusterInfo(self): |
487 | 66baeccc | Iustin Pop | return self.CallMethod(REQ_QUERY_CLUSTER_INFO, ()) |
488 | 66baeccc | Iustin Pop | |
489 | ae5849b5 | Michael Hanselmann | def QueryConfigValues(self, fields): |
490 | ae5849b5 | Michael Hanselmann | return self.CallMethod(REQ_QUERY_CONFIG_VALUES, fields) |
491 | ae5849b5 | Michael Hanselmann | |
492 | 7699c3af | Iustin Pop | def QueryTags(self, kind, name): |
493 | 7699c3af | Iustin Pop | return self.CallMethod(REQ_QUERY_TAGS, (kind, name)) |
494 | 19b9ba9a | Michael Hanselmann | |
495 | 19b9ba9a | Michael Hanselmann | def QueryLocks(self, fields, sync): |
496 | 19b9ba9a | Michael Hanselmann | return self.CallMethod(REQ_QUERY_LOCKS, (fields, sync)) |