root / lib / luxi.py @ 29e8788e
History | View | Annotate | Download (14.3 kB)
1 | c2a03789 | Iustin Pop | #
|
---|---|---|---|
2 | c2a03789 | Iustin Pop | #
|
3 | c2a03789 | Iustin Pop | |
4 | c2a03789 | Iustin Pop | # Copyright (C) 2006, 2007 Google Inc.
|
5 | c2a03789 | Iustin Pop | #
|
6 | c2a03789 | Iustin Pop | # This program is free software; you can redistribute it and/or modify
|
7 | c2a03789 | Iustin Pop | # it under the terms of the GNU General Public License as published by
|
8 | c2a03789 | Iustin Pop | # the Free Software Foundation; either version 2 of the License, or
|
9 | c2a03789 | Iustin Pop | # (at your option) any later version.
|
10 | c2a03789 | Iustin Pop | #
|
11 | c2a03789 | Iustin Pop | # This program is distributed in the hope that it will be useful, but
|
12 | c2a03789 | Iustin Pop | # WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 | c2a03789 | Iustin Pop | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
14 | c2a03789 | Iustin Pop | # General Public License for more details.
|
15 | c2a03789 | Iustin Pop | #
|
16 | c2a03789 | Iustin Pop | # You should have received a copy of the GNU General Public License
|
17 | c2a03789 | Iustin Pop | # along with this program; if not, write to the Free Software
|
18 | c2a03789 | Iustin Pop | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
19 | c2a03789 | Iustin Pop | # 02110-1301, USA.
|
20 | c2a03789 | Iustin Pop | |
21 | c2a03789 | Iustin Pop | |
22 | c2a03789 | Iustin Pop | """Module for the unix socket protocol
|
23 | c2a03789 | Iustin Pop |
|
24 | 8d5b316c | Iustin Pop | This module implements the local unix socket protocol. You only need
|
25 | c2a03789 | Iustin Pop | this module and the opcodes module in the client program in order to
|
26 | c2a03789 | Iustin Pop | communicate with the master.
|
27 | c2a03789 | Iustin Pop |
|
28 | 7577196d | Guido Trotter | The module is also used by the master daemon.
|
29 | c2a03789 | Iustin Pop |
|
30 | c2a03789 | Iustin Pop | """
|
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"
|
45 | 231db3a5 | Michael Hanselmann | KEY_ARGS = "args"
|
46 | 3d8548c4 | Michael Hanselmann | KEY_SUCCESS = "success"
|
47 | 3d8548c4 | Michael Hanselmann | KEY_RESULT = "result"
|
48 | e986f20c | Michael Hanselmann | KEY_VERSION = "version"
|
49 | 3d8548c4 | Michael Hanselmann | |
50 | 0bbe448c | Michael Hanselmann | REQ_SUBMIT_JOB = "SubmitJob"
|
51 | 2971c913 | Iustin Pop | REQ_SUBMIT_MANY_JOBS = "SubmitManyJobs"
|
52 | dfe57c22 | Michael Hanselmann | REQ_WAIT_FOR_JOB_CHANGE = "WaitForJobChange"
|
53 | 0bbe448c | Michael Hanselmann | REQ_CANCEL_JOB = "CancelJob"
|
54 | 0bbe448c | Michael Hanselmann | REQ_ARCHIVE_JOB = "ArchiveJob"
|
55 | 07cd723a | Iustin Pop | REQ_AUTOARCHIVE_JOBS = "AutoArchiveJobs"
|
56 | 0bbe448c | Michael Hanselmann | REQ_QUERY_JOBS = "QueryJobs"
|
57 | ee6c7b94 | Michael Hanselmann | REQ_QUERY_INSTANCES = "QueryInstances"
|
58 | 02f7fe54 | Michael Hanselmann | REQ_QUERY_NODES = "QueryNodes"
|
59 | 32f93223 | Michael Hanselmann | REQ_QUERY_EXPORTS = "QueryExports"
|
60 | ae5849b5 | Michael Hanselmann | REQ_QUERY_CONFIG_VALUES = "QueryConfigValues"
|
61 | 66baeccc | Iustin Pop | REQ_QUERY_CLUSTER_INFO = "QueryClusterInfo"
|
62 | 7699c3af | Iustin Pop | REQ_QUERY_TAGS = "QueryTags"
|
63 | 19b9ba9a | Michael Hanselmann | REQ_QUERY_LOCKS = "QueryLocks"
|
64 | 3ccafd0e | Iustin Pop | REQ_QUEUE_SET_DRAIN_FLAG = "SetDrainFlag"
|
65 | 05e50653 | Michael Hanselmann | REQ_SET_WATCHER_PAUSE = "SetWatcherPause"
|
66 | c2a03789 | Iustin Pop | |
67 | c2a03789 | Iustin Pop | DEF_CTMO = 10
|
68 | c2a03789 | Iustin Pop | DEF_RWTO = 60
|
69 | c2a03789 | Iustin Pop | |
70 | 793a8f7c | Michael Hanselmann | # WaitForJobChange timeout
|
71 | 793a8f7c | Michael Hanselmann | WFJC_TIMEOUT = (DEF_RWTO - 1) / 2 |
72 | 793a8f7c | Michael Hanselmann | |
73 | c2a03789 | Iustin Pop | |
74 | 7a8bda3f | Michael Hanselmann | class ProtocolError(errors.LuxiError): |
75 | 5a1c22fe | Iustin Pop | """Denotes an error in the LUXI protocol."""
|
76 | c2a03789 | Iustin Pop | |
77 | c2a03789 | Iustin Pop | |
78 | c2a03789 | Iustin Pop | class ConnectionClosedError(ProtocolError): |
79 | 5a1c22fe | Iustin Pop | """Connection closed error."""
|
80 | c2a03789 | Iustin Pop | |
81 | c2a03789 | Iustin Pop | |
82 | c2a03789 | Iustin Pop | class TimeoutError(ProtocolError): |
83 | 5a1c22fe | Iustin Pop | """Operation timeout error."""
|
84 | c2a03789 | Iustin Pop | |
85 | c2a03789 | Iustin Pop | |
86 | b77acb3e | Iustin Pop | class RequestError(ProtocolError): |
87 | 5a1c22fe | Iustin Pop | """Error on request.
|
88 | b77acb3e | Iustin Pop |
|
89 | b77acb3e | Iustin Pop | This signifies an error in the request format or request handling,
|
90 | b77acb3e | Iustin Pop | but not (e.g.) an error in starting up an instance.
|
91 | b77acb3e | Iustin Pop |
|
92 | b77acb3e | Iustin Pop | Some common conditions that can trigger this exception:
|
93 | b77acb3e | Iustin Pop | - job submission failed because the job data was wrong
|
94 | b77acb3e | Iustin Pop | - query failed because required fields were missing
|
95 | b77acb3e | Iustin Pop |
|
96 | b77acb3e | Iustin Pop | """
|
97 | b77acb3e | Iustin Pop | |
98 | 3d8548c4 | Michael Hanselmann | |
99 | 03a8dbdc | Iustin Pop | class NoMasterError(ProtocolError): |
100 | 5a1c22fe | Iustin Pop | """The master cannot be reached.
|
101 | 03a8dbdc | Iustin Pop |
|
102 | 03a8dbdc | Iustin Pop | This means that the master daemon is not running or the socket has
|
103 | 03a8dbdc | Iustin Pop | been removed.
|
104 | 03a8dbdc | Iustin Pop |
|
105 | 03a8dbdc | Iustin Pop | """
|
106 | 03a8dbdc | Iustin Pop | |
107 | b77acb3e | Iustin Pop | |
108 | 5a1c22fe | Iustin Pop | class PermissionError(ProtocolError): |
109 | 5a1c22fe | Iustin Pop | """Permission denied while connecting to the master socket.
|
110 | 5a1c22fe | Iustin Pop |
|
111 | 5a1c22fe | Iustin Pop | This means the user doesn't have the proper rights.
|
112 | 5a1c22fe | Iustin Pop |
|
113 | 5a1c22fe | Iustin Pop | """
|
114 | 5a1c22fe | Iustin Pop | |
115 | 5a1c22fe | Iustin Pop | |
116 | c2a03789 | Iustin Pop | class Transport: |
117 | c2a03789 | Iustin Pop | """Low-level transport class.
|
118 | c2a03789 | Iustin Pop |
|
119 | c2a03789 | Iustin Pop | This is used on the client side.
|
120 | c2a03789 | Iustin Pop |
|
121 | c2a03789 | Iustin Pop | This could be replace by any other class that provides the same
|
122 | c2a03789 | Iustin Pop | semantics to the Client. This means:
|
123 | c2a03789 | Iustin Pop | - can send messages and receive messages
|
124 | c2a03789 | Iustin Pop | - safe for multithreading
|
125 | c2a03789 | Iustin Pop |
|
126 | c2a03789 | Iustin Pop | """
|
127 | c2a03789 | Iustin Pop | |
128 | 25942a6c | Guido Trotter | def __init__(self, address, timeouts=None): |
129 | c2a03789 | Iustin Pop | """Constructor for the Client class.
|
130 | c2a03789 | Iustin Pop |
|
131 | c2a03789 | Iustin Pop | Arguments:
|
132 | c2a03789 | Iustin Pop | - address: a valid address the the used transport class
|
133 | c2a03789 | Iustin Pop | - timeout: a list of timeouts, to be used on connect and read/write
|
134 | c2a03789 | Iustin Pop |
|
135 | c2a03789 | Iustin Pop | There are two timeouts used since we might want to wait for a long
|
136 | c2a03789 | Iustin Pop | time for a response, but the connect timeout should be lower.
|
137 | c2a03789 | Iustin Pop |
|
138 | c2a03789 | Iustin Pop | If not passed, we use a default of 10 and respectively 60 seconds.
|
139 | c2a03789 | Iustin Pop |
|
140 | c2a03789 | Iustin Pop | Note that on reading data, since the timeout applies to an
|
141 | c2a03789 | Iustin Pop | invidual receive, it might be that the total duration is longer
|
142 | c2a03789 | Iustin Pop | than timeout value passed (we make a hard limit at twice the read
|
143 | c2a03789 | Iustin Pop | timeout).
|
144 | c2a03789 | Iustin Pop |
|
145 | c2a03789 | Iustin Pop | """
|
146 | c2a03789 | Iustin Pop | self.address = address
|
147 | c2a03789 | Iustin Pop | if timeouts is None: |
148 | c2a03789 | Iustin Pop | self._ctimeout, self._rwtimeout = DEF_CTMO, DEF_RWTO |
149 | c2a03789 | Iustin Pop | else:
|
150 | c2a03789 | Iustin Pop | self._ctimeout, self._rwtimeout = timeouts |
151 | c2a03789 | Iustin Pop | |
152 | c2a03789 | Iustin Pop | self.socket = None |
153 | c2a03789 | Iustin Pop | self._buffer = "" |
154 | c2a03789 | Iustin Pop | self._msgs = collections.deque()
|
155 | c2a03789 | Iustin Pop | |
156 | c2a03789 | Iustin Pop | try:
|
157 | c2a03789 | Iustin Pop | self.socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
|
158 | cb462b06 | Michael Hanselmann | |
159 | cb462b06 | Michael Hanselmann | # Try to connect
|
160 | c2a03789 | Iustin Pop | try:
|
161 | cb462b06 | Michael Hanselmann | utils.Retry(self._Connect, 1.0, self._ctimeout, |
162 | cb462b06 | Michael Hanselmann | args=(self.socket, address, self._ctimeout)) |
163 | cb462b06 | Michael Hanselmann | except utils.RetryTimeout:
|
164 | cb462b06 | Michael Hanselmann | raise TimeoutError("Connect timed out") |
165 | cb462b06 | Michael Hanselmann | |
166 | c2a03789 | Iustin Pop | self.socket.settimeout(self._rwtimeout) |
167 | 03a8dbdc | Iustin Pop | except (socket.error, NoMasterError):
|
168 | c2a03789 | Iustin Pop | if self.socket is not None: |
169 | c2a03789 | Iustin Pop | self.socket.close()
|
170 | c2a03789 | Iustin Pop | self.socket = None |
171 | c2a03789 | Iustin Pop | raise
|
172 | c2a03789 | Iustin Pop | |
173 | cb462b06 | Michael Hanselmann | @staticmethod
|
174 | cb462b06 | Michael Hanselmann | def _Connect(sock, address, timeout): |
175 | cb462b06 | Michael Hanselmann | sock.settimeout(timeout) |
176 | cb462b06 | Michael Hanselmann | try:
|
177 | cb462b06 | Michael Hanselmann | sock.connect(address) |
178 | cb462b06 | Michael Hanselmann | except socket.timeout, err:
|
179 | cb462b06 | Michael Hanselmann | raise TimeoutError("Connect timed out: %s" % str(err)) |
180 | cb462b06 | Michael Hanselmann | except socket.error, err:
|
181 | 5a1c22fe | Iustin Pop | error_code = err.args[0]
|
182 | 5a1c22fe | Iustin Pop | if error_code in (errno.ENOENT, errno.ECONNREFUSED): |
183 | cb462b06 | Michael Hanselmann | raise NoMasterError(address)
|
184 | 5a1c22fe | Iustin Pop | elif error_code in (errno.EPERM, errno.EACCES): |
185 | 5a1c22fe | Iustin Pop | raise PermissionError(address)
|
186 | 5a1c22fe | Iustin Pop | elif error_code == errno.EAGAIN:
|
187 | cb462b06 | Michael Hanselmann | # Server's socket backlog is full at the moment
|
188 | cb462b06 | Michael Hanselmann | raise utils.RetryAgain()
|
189 | cb462b06 | Michael Hanselmann | raise
|
190 | cb462b06 | Michael Hanselmann | |
191 | c2a03789 | Iustin Pop | def _CheckSocket(self): |
192 | c2a03789 | Iustin Pop | """Make sure we are connected.
|
193 | c2a03789 | Iustin Pop |
|
194 | c2a03789 | Iustin Pop | """
|
195 | c2a03789 | Iustin Pop | if self.socket is None: |
196 | c2a03789 | Iustin Pop | raise ProtocolError("Connection is closed") |
197 | c2a03789 | Iustin Pop | |
198 | c2a03789 | Iustin Pop | def Send(self, msg): |
199 | c2a03789 | Iustin Pop | """Send a message.
|
200 | c2a03789 | Iustin Pop |
|
201 | c2a03789 | Iustin Pop | This just sends a message and doesn't wait for the response.
|
202 | c2a03789 | Iustin Pop |
|
203 | c2a03789 | Iustin Pop | """
|
204 | 25942a6c | Guido Trotter | if constants.LUXI_EOM in msg: |
205 | 797506fc | Michael Hanselmann | raise ProtocolError("Message terminator found in payload") |
206 | 797506fc | Michael Hanselmann | |
207 | c2a03789 | Iustin Pop | self._CheckSocket()
|
208 | c2a03789 | Iustin Pop | try:
|
209 | 6096ee13 | Michael Hanselmann | # TODO: sendall is not guaranteed to send everything
|
210 | 25942a6c | Guido Trotter | self.socket.sendall(msg + constants.LUXI_EOM)
|
211 | c2a03789 | Iustin Pop | except socket.timeout, err:
|
212 | c2a03789 | Iustin Pop | raise TimeoutError("Sending timeout: %s" % str(err)) |
213 | c2a03789 | Iustin Pop | |
214 | c2a03789 | Iustin Pop | def Recv(self): |
215 | 5bbd3f7f | Michael Hanselmann | """Try to receive a message from the socket.
|
216 | c2a03789 | Iustin Pop |
|
217 | c2a03789 | Iustin Pop | In case we already have messages queued, we just return from the
|
218 | c2a03789 | Iustin Pop | queue. Otherwise, we try to read data with a _rwtimeout network
|
219 | c2a03789 | Iustin Pop | timeout, and making sure we don't go over 2x_rwtimeout as a global
|
220 | c2a03789 | Iustin Pop | limit.
|
221 | c2a03789 | Iustin Pop |
|
222 | c2a03789 | Iustin Pop | """
|
223 | c2a03789 | Iustin Pop | self._CheckSocket()
|
224 | c2a03789 | Iustin Pop | etime = time.time() + self._rwtimeout
|
225 | c2a03789 | Iustin Pop | while not self._msgs: |
226 | c2a03789 | Iustin Pop | if time.time() > etime:
|
227 | c2a03789 | Iustin Pop | raise TimeoutError("Extended receive timeout") |
228 | 6096ee13 | Michael Hanselmann | while True: |
229 | 6096ee13 | Michael Hanselmann | try:
|
230 | 6096ee13 | Michael Hanselmann | data = self.socket.recv(4096) |
231 | 6096ee13 | Michael Hanselmann | except socket.error, err:
|
232 | 6096ee13 | Michael Hanselmann | if err.args and err.args[0] == errno.EAGAIN: |
233 | 6096ee13 | Michael Hanselmann | continue
|
234 | 6096ee13 | Michael Hanselmann | raise
|
235 | 6096ee13 | Michael Hanselmann | except socket.timeout, err:
|
236 | 6096ee13 | Michael Hanselmann | raise TimeoutError("Receive timeout: %s" % str(err)) |
237 | 6096ee13 | Michael Hanselmann | break
|
238 | c2a03789 | Iustin Pop | if not data: |
239 | c2a03789 | Iustin Pop | raise ConnectionClosedError("Connection closed while reading") |
240 | 25942a6c | Guido Trotter | new_msgs = (self._buffer + data).split(constants.LUXI_EOM)
|
241 | c2a03789 | Iustin Pop | self._buffer = new_msgs.pop()
|
242 | c2a03789 | Iustin Pop | self._msgs.extend(new_msgs)
|
243 | c2a03789 | Iustin Pop | return self._msgs.popleft() |
244 | c2a03789 | Iustin Pop | |
245 | c2a03789 | Iustin Pop | def Call(self, msg): |
246 | c2a03789 | Iustin Pop | """Send a message and wait for the response.
|
247 | c2a03789 | Iustin Pop |
|
248 | c2a03789 | Iustin Pop | This is just a wrapper over Send and Recv.
|
249 | c2a03789 | Iustin Pop |
|
250 | c2a03789 | Iustin Pop | """
|
251 | c2a03789 | Iustin Pop | self.Send(msg)
|
252 | c2a03789 | Iustin Pop | return self.Recv() |
253 | c2a03789 | Iustin Pop | |
254 | c2a03789 | Iustin Pop | def Close(self): |
255 | c2a03789 | Iustin Pop | """Close the socket"""
|
256 | c2a03789 | Iustin Pop | if self.socket is not None: |
257 | c2a03789 | Iustin Pop | self.socket.close()
|
258 | c2a03789 | Iustin Pop | self.socket = None |
259 | c2a03789 | Iustin Pop | |
260 | c2a03789 | Iustin Pop | |
261 | 231db3a5 | Michael Hanselmann | def ParseRequest(msg): |
262 | 231db3a5 | Michael Hanselmann | """Parses a LUXI request message.
|
263 | 231db3a5 | Michael Hanselmann |
|
264 | 231db3a5 | Michael Hanselmann | """
|
265 | 231db3a5 | Michael Hanselmann | try:
|
266 | 231db3a5 | Michael Hanselmann | request = serializer.LoadJson(msg) |
267 | 231db3a5 | Michael Hanselmann | except ValueError, err: |
268 | 231db3a5 | Michael Hanselmann | raise ProtocolError("Invalid LUXI request (parsing error): %s" % err) |
269 | 231db3a5 | Michael Hanselmann | |
270 | 231db3a5 | Michael Hanselmann | logging.debug("LUXI request: %s", request)
|
271 | 231db3a5 | Michael Hanselmann | |
272 | 231db3a5 | Michael Hanselmann | if not isinstance(request, dict): |
273 | 231db3a5 | Michael Hanselmann | logging.error("LUXI request not a dict: %r", msg)
|
274 | 231db3a5 | Michael Hanselmann | raise ProtocolError("Invalid LUXI request (not a dict)") |
275 | 231db3a5 | Michael Hanselmann | |
276 | e7a25b08 | Guido Trotter | method = request.get(KEY_METHOD, None) # pylint: disable-msg=E1103 |
277 | e7a25b08 | Guido Trotter | args = request.get(KEY_ARGS, None) # pylint: disable-msg=E1103 |
278 | 2317945a | Guido Trotter | version = request.get(KEY_VERSION, None) # pylint: disable-msg=E1103 |
279 | e7a25b08 | Guido Trotter | |
280 | 231db3a5 | Michael Hanselmann | if method is None or args is None: |
281 | 231db3a5 | Michael Hanselmann | logging.error("LUXI request missing method or arguments: %r", msg)
|
282 | 231db3a5 | Michael Hanselmann | raise ProtocolError(("Invalid LUXI request (no method or arguments" |
283 | 231db3a5 | Michael Hanselmann | " in request): %r") % msg)
|
284 | 231db3a5 | Michael Hanselmann | |
285 | e986f20c | Michael Hanselmann | return (method, args, version)
|
286 | 231db3a5 | Michael Hanselmann | |
287 | 231db3a5 | Michael Hanselmann | |
288 | 231db3a5 | Michael Hanselmann | def ParseResponse(msg): |
289 | 231db3a5 | Michael Hanselmann | """Parses a LUXI response message.
|
290 | 231db3a5 | Michael Hanselmann |
|
291 | 231db3a5 | Michael Hanselmann | """
|
292 | 231db3a5 | Michael Hanselmann | # Parse the result
|
293 | 231db3a5 | Michael Hanselmann | try:
|
294 | 231db3a5 | Michael Hanselmann | data = serializer.LoadJson(msg) |
295 | 231db3a5 | Michael Hanselmann | except Exception, err: |
296 | 231db3a5 | Michael Hanselmann | raise ProtocolError("Error while deserializing response: %s" % str(err)) |
297 | 231db3a5 | Michael Hanselmann | |
298 | 231db3a5 | Michael Hanselmann | # Validate response
|
299 | 231db3a5 | Michael Hanselmann | if not (isinstance(data, dict) and |
300 | 231db3a5 | Michael Hanselmann | KEY_SUCCESS in data and |
301 | 231db3a5 | Michael Hanselmann | KEY_RESULT in data):
|
302 | 231db3a5 | Michael Hanselmann | raise ProtocolError("Invalid response from server: %r" % data) |
303 | 231db3a5 | Michael Hanselmann | |
304 | 2317945a | Guido Trotter | return (data[KEY_SUCCESS], data[KEY_RESULT],
|
305 | 2317945a | Guido Trotter | data.get(KEY_VERSION, None)) # pylint: disable-msg=E1103 |
306 | 231db3a5 | Michael Hanselmann | |
307 | 231db3a5 | Michael Hanselmann | |
308 | e986f20c | Michael Hanselmann | def FormatResponse(success, result, version=None): |
309 | 231db3a5 | Michael Hanselmann | """Formats a LUXI response message.
|
310 | 231db3a5 | Michael Hanselmann |
|
311 | 231db3a5 | Michael Hanselmann | """
|
312 | 231db3a5 | Michael Hanselmann | response = { |
313 | 231db3a5 | Michael Hanselmann | KEY_SUCCESS: success, |
314 | 231db3a5 | Michael Hanselmann | KEY_RESULT: result, |
315 | 231db3a5 | Michael Hanselmann | } |
316 | 231db3a5 | Michael Hanselmann | |
317 | e986f20c | Michael Hanselmann | if version is not None: |
318 | e986f20c | Michael Hanselmann | response[KEY_VERSION] = version |
319 | e986f20c | Michael Hanselmann | |
320 | 231db3a5 | Michael Hanselmann | logging.debug("LUXI response: %s", response)
|
321 | 231db3a5 | Michael Hanselmann | |
322 | 231db3a5 | Michael Hanselmann | return serializer.DumpJson(response)
|
323 | 231db3a5 | Michael Hanselmann | |
324 | 231db3a5 | Michael Hanselmann | |
325 | e986f20c | Michael Hanselmann | def FormatRequest(method, args, version=None): |
326 | 231db3a5 | Michael Hanselmann | """Formats a LUXI request message.
|
327 | 231db3a5 | Michael Hanselmann |
|
328 | 231db3a5 | Michael Hanselmann | """
|
329 | 231db3a5 | Michael Hanselmann | # Build request
|
330 | 231db3a5 | Michael Hanselmann | request = { |
331 | 231db3a5 | Michael Hanselmann | KEY_METHOD: method, |
332 | 231db3a5 | Michael Hanselmann | KEY_ARGS: args, |
333 | 231db3a5 | Michael Hanselmann | } |
334 | 231db3a5 | Michael Hanselmann | |
335 | e986f20c | Michael Hanselmann | if version is not None: |
336 | e986f20c | Michael Hanselmann | request[KEY_VERSION] = version |
337 | e986f20c | Michael Hanselmann | |
338 | 231db3a5 | Michael Hanselmann | # Serialize the request
|
339 | 231db3a5 | Michael Hanselmann | return serializer.DumpJson(request, indent=False) |
340 | 231db3a5 | Michael Hanselmann | |
341 | 231db3a5 | Michael Hanselmann | |
342 | e986f20c | Michael Hanselmann | def CallLuxiMethod(transport_cb, method, args, version=None): |
343 | 231db3a5 | Michael Hanselmann | """Send a LUXI request via a transport and return the response.
|
344 | 231db3a5 | Michael Hanselmann |
|
345 | 231db3a5 | Michael Hanselmann | """
|
346 | 231db3a5 | Michael Hanselmann | assert callable(transport_cb) |
347 | 231db3a5 | Michael Hanselmann | |
348 | e986f20c | Michael Hanselmann | request_msg = FormatRequest(method, args, version=version) |
349 | 231db3a5 | Michael Hanselmann | |
350 | 231db3a5 | Michael Hanselmann | # Send request and wait for response
|
351 | 231db3a5 | Michael Hanselmann | response_msg = transport_cb(request_msg) |
352 | 231db3a5 | Michael Hanselmann | |
353 | e986f20c | Michael Hanselmann | (success, result, resp_version) = ParseResponse(response_msg) |
354 | e986f20c | Michael Hanselmann | |
355 | e986f20c | Michael Hanselmann | # Verify version if there was one in the response
|
356 | e986f20c | Michael Hanselmann | if resp_version is not None and resp_version != version: |
357 | e986f20c | Michael Hanselmann | raise errors.LuxiError("LUXI version mismatch, client %s, response %s" % |
358 | e986f20c | Michael Hanselmann | (version, resp_version)) |
359 | 231db3a5 | Michael Hanselmann | |
360 | 231db3a5 | Michael Hanselmann | if success:
|
361 | 231db3a5 | Michael Hanselmann | return result
|
362 | 231db3a5 | Michael Hanselmann | |
363 | 231db3a5 | Michael Hanselmann | errors.MaybeRaise(result) |
364 | 231db3a5 | Michael Hanselmann | raise RequestError(result)
|
365 | 231db3a5 | Michael Hanselmann | |
366 | 231db3a5 | Michael Hanselmann | |
367 | c2a03789 | Iustin Pop | class Client(object): |
368 | c2a03789 | Iustin Pop | """High-level client implementation.
|
369 | c2a03789 | Iustin Pop |
|
370 | c2a03789 | Iustin Pop | This uses a backing Transport-like class on top of which it
|
371 | c2a03789 | Iustin Pop | implements data serialization/deserialization.
|
372 | c2a03789 | Iustin Pop |
|
373 | c2a03789 | Iustin Pop | """
|
374 | ceab32dd | Iustin Pop | def __init__(self, address=None, timeouts=None, transport=Transport): |
375 | c2a03789 | Iustin Pop | """Constructor for the Client class.
|
376 | c2a03789 | Iustin Pop |
|
377 | c2a03789 | Iustin Pop | Arguments:
|
378 | c2a03789 | Iustin Pop | - address: a valid address the the used transport class
|
379 | c2a03789 | Iustin Pop | - timeout: a list of timeouts, to be used on connect and read/write
|
380 | c2a03789 | Iustin Pop | - transport: a Transport-like class
|
381 | c2a03789 | Iustin Pop |
|
382 | c2a03789 | Iustin Pop |
|
383 | c2a03789 | Iustin Pop | If timeout is not passed, the default timeouts of the transport
|
384 | c2a03789 | Iustin Pop | class are used.
|
385 | c2a03789 | Iustin Pop |
|
386 | c2a03789 | Iustin Pop | """
|
387 | ceab32dd | Iustin Pop | if address is None: |
388 | ceab32dd | Iustin Pop | address = constants.MASTER_SOCKET |
389 | 8d5b316c | Iustin Pop | self.address = address
|
390 | 8d5b316c | Iustin Pop | self.timeouts = timeouts
|
391 | 8d5b316c | Iustin Pop | self.transport_class = transport
|
392 | 8d5b316c | Iustin Pop | self.transport = None |
393 | 8d5b316c | Iustin Pop | self._InitTransport()
|
394 | 8d5b316c | Iustin Pop | |
395 | 8d5b316c | Iustin Pop | def _InitTransport(self): |
396 | 8d5b316c | Iustin Pop | """(Re)initialize the transport if needed.
|
397 | 8d5b316c | Iustin Pop |
|
398 | 8d5b316c | Iustin Pop | """
|
399 | 8d5b316c | Iustin Pop | if self.transport is None: |
400 | 8d5b316c | Iustin Pop | self.transport = self.transport_class(self.address, |
401 | 8d5b316c | Iustin Pop | timeouts=self.timeouts)
|
402 | 8d5b316c | Iustin Pop | |
403 | 8d5b316c | Iustin Pop | def _CloseTransport(self): |
404 | 8d5b316c | Iustin Pop | """Close the transport, ignoring errors.
|
405 | 8d5b316c | Iustin Pop |
|
406 | 8d5b316c | Iustin Pop | """
|
407 | 8d5b316c | Iustin Pop | if self.transport is None: |
408 | 8d5b316c | Iustin Pop | return
|
409 | 8d5b316c | Iustin Pop | try:
|
410 | 8d5b316c | Iustin Pop | old_transp = self.transport
|
411 | 8d5b316c | Iustin Pop | self.transport = None |
412 | 8d5b316c | Iustin Pop | old_transp.Close() |
413 | 7260cfbe | Iustin Pop | except Exception: # pylint: disable-msg=W0703 |
414 | 8d5b316c | Iustin Pop | pass
|
415 | c2a03789 | Iustin Pop | |
416 | 231db3a5 | Michael Hanselmann | def _SendMethodCall(self, data): |
417 | 3d8548c4 | Michael Hanselmann | # Send request and wait for response
|
418 | 8d5b316c | Iustin Pop | try:
|
419 | 8d5b316c | Iustin Pop | self._InitTransport()
|
420 | 231db3a5 | Michael Hanselmann | return self.transport.Call(data) |
421 | 8d5b316c | Iustin Pop | except Exception: |
422 | 8d5b316c | Iustin Pop | self._CloseTransport()
|
423 | 8d5b316c | Iustin Pop | raise
|
424 | 8d5b316c | Iustin Pop | |
425 | 231db3a5 | Michael Hanselmann | def CallMethod(self, method, args): |
426 | 231db3a5 | Michael Hanselmann | """Send a generic request and return the response.
|
427 | 3d8548c4 | Michael Hanselmann |
|
428 | 231db3a5 | Michael Hanselmann | """
|
429 | e986f20c | Michael Hanselmann | return CallLuxiMethod(self._SendMethodCall, method, args, |
430 | e986f20c | Michael Hanselmann | version=constants.LUXI_VERSION) |
431 | c2a03789 | Iustin Pop | |
432 | 3ccafd0e | Iustin Pop | def SetQueueDrainFlag(self, drain_flag): |
433 | 3ccafd0e | Iustin Pop | return self.CallMethod(REQ_QUEUE_SET_DRAIN_FLAG, drain_flag) |
434 | 3ccafd0e | Iustin Pop | |
435 | 05e50653 | Michael Hanselmann | def SetWatcherPause(self, until): |
436 | 05e50653 | Michael Hanselmann | return self.CallMethod(REQ_SET_WATCHER_PAUSE, [until]) |
437 | 05e50653 | Michael Hanselmann | |
438 | 0bbe448c | Michael Hanselmann | def SubmitJob(self, ops): |
439 | 0bbe448c | Michael Hanselmann | ops_state = map(lambda op: op.__getstate__(), ops) |
440 | 0bbe448c | Michael Hanselmann | return self.CallMethod(REQ_SUBMIT_JOB, ops_state) |
441 | 0bbe448c | Michael Hanselmann | |
442 | 2971c913 | Iustin Pop | def SubmitManyJobs(self, jobs): |
443 | 2971c913 | Iustin Pop | jobs_state = [] |
444 | 2971c913 | Iustin Pop | for ops in jobs: |
445 | 2971c913 | Iustin Pop | jobs_state.append([op.__getstate__() for op in ops]) |
446 | 2971c913 | Iustin Pop | return self.CallMethod(REQ_SUBMIT_MANY_JOBS, jobs_state) |
447 | 2971c913 | Iustin Pop | |
448 | 0bbe448c | Michael Hanselmann | def CancelJob(self, job_id): |
449 | 0bbe448c | Michael Hanselmann | return self.CallMethod(REQ_CANCEL_JOB, job_id) |
450 | 0bbe448c | Michael Hanselmann | |
451 | 0bbe448c | Michael Hanselmann | def ArchiveJob(self, job_id): |
452 | 0bbe448c | Michael Hanselmann | return self.CallMethod(REQ_ARCHIVE_JOB, job_id) |
453 | 0bbe448c | Michael Hanselmann | |
454 | 07cd723a | Iustin Pop | def AutoArchiveJobs(self, age): |
455 | f8ad5591 | Michael Hanselmann | timeout = (DEF_RWTO - 1) / 2 |
456 | f8ad5591 | Michael Hanselmann | return self.CallMethod(REQ_AUTOARCHIVE_JOBS, (age, timeout)) |
457 | 07cd723a | Iustin Pop | |
458 | f4484122 | Michael Hanselmann | def WaitForJobChangeOnce(self, job_id, fields, |
459 | 793a8f7c | Michael Hanselmann | prev_job_info, prev_log_serial, |
460 | 793a8f7c | Michael Hanselmann | timeout=WFJC_TIMEOUT): |
461 | 793a8f7c | Michael Hanselmann | """Waits for changes on a job.
|
462 | 793a8f7c | Michael Hanselmann |
|
463 | 793a8f7c | Michael Hanselmann | @param job_id: Job ID
|
464 | 793a8f7c | Michael Hanselmann | @type fields: list
|
465 | 793a8f7c | Michael Hanselmann | @param fields: List of field names to be observed
|
466 | 793a8f7c | Michael Hanselmann | @type prev_job_info: None or list
|
467 | 793a8f7c | Michael Hanselmann | @param prev_job_info: Previously received job information
|
468 | 793a8f7c | Michael Hanselmann | @type prev_log_serial: None or int/long
|
469 | 793a8f7c | Michael Hanselmann | @param prev_log_serial: Highest log serial number previously received
|
470 | 793a8f7c | Michael Hanselmann | @type timeout: int/float
|
471 | 793a8f7c | Michael Hanselmann | @param timeout: Timeout in seconds (values larger than L{WFJC_TIMEOUT} will
|
472 | 793a8f7c | Michael Hanselmann | be capped to that value)
|
473 | 793a8f7c | Michael Hanselmann |
|
474 | 793a8f7c | Michael Hanselmann | """
|
475 | 793a8f7c | Michael Hanselmann | assert timeout >= 0, "Timeout can not be negative" |
476 | f4484122 | Michael Hanselmann | return self.CallMethod(REQ_WAIT_FOR_JOB_CHANGE, |
477 | f4484122 | Michael Hanselmann | (job_id, fields, prev_job_info, |
478 | 793a8f7c | Michael Hanselmann | prev_log_serial, |
479 | 793a8f7c | Michael Hanselmann | min(WFJC_TIMEOUT, timeout)))
|
480 | f4484122 | Michael Hanselmann | |
481 | f4484122 | Michael Hanselmann | def WaitForJobChange(self, job_id, fields, prev_job_info, prev_log_serial): |
482 | 5c735209 | Iustin Pop | while True: |
483 | f4484122 | Michael Hanselmann | result = self.WaitForJobChangeOnce(job_id, fields,
|
484 | f4484122 | Michael Hanselmann | prev_job_info, prev_log_serial) |
485 | 5c735209 | Iustin Pop | if result != constants.JOB_NOTCHANGED:
|
486 | 5c735209 | Iustin Pop | break
|
487 | 5c735209 | Iustin Pop | return result
|
488 | dfe57c22 | Michael Hanselmann | |
489 | 0bbe448c | Michael Hanselmann | def QueryJobs(self, job_ids, fields): |
490 | 0bbe448c | Michael Hanselmann | return self.CallMethod(REQ_QUERY_JOBS, (job_ids, fields)) |
491 | 3d8548c4 | Michael Hanselmann | |
492 | ec79568d | Iustin Pop | def QueryInstances(self, names, fields, use_locking): |
493 | ec79568d | Iustin Pop | return self.CallMethod(REQ_QUERY_INSTANCES, (names, fields, use_locking)) |
494 | ee6c7b94 | Michael Hanselmann | |
495 | ec79568d | Iustin Pop | def QueryNodes(self, names, fields, use_locking): |
496 | ec79568d | Iustin Pop | return self.CallMethod(REQ_QUERY_NODES, (names, fields, use_locking)) |
497 | 02f7fe54 | Michael Hanselmann | |
498 | ec79568d | Iustin Pop | def QueryExports(self, nodes, use_locking): |
499 | ec79568d | Iustin Pop | return self.CallMethod(REQ_QUERY_EXPORTS, (nodes, use_locking)) |
500 | 32f93223 | Michael Hanselmann | |
501 | 66baeccc | Iustin Pop | def QueryClusterInfo(self): |
502 | 66baeccc | Iustin Pop | return self.CallMethod(REQ_QUERY_CLUSTER_INFO, ()) |
503 | 66baeccc | Iustin Pop | |
504 | ae5849b5 | Michael Hanselmann | def QueryConfigValues(self, fields): |
505 | ae5849b5 | Michael Hanselmann | return self.CallMethod(REQ_QUERY_CONFIG_VALUES, fields) |
506 | ae5849b5 | Michael Hanselmann | |
507 | 7699c3af | Iustin Pop | def QueryTags(self, kind, name): |
508 | 7699c3af | Iustin Pop | return self.CallMethod(REQ_QUERY_TAGS, (kind, name)) |
509 | 19b9ba9a | Michael Hanselmann | |
510 | 19b9ba9a | Michael Hanselmann | def QueryLocks(self, fields, sync): |
511 | 19b9ba9a | Michael Hanselmann | return self.CallMethod(REQ_QUERY_LOCKS, (fields, sync)) |