root / src / Ganeti / JQueue.hs @ b9202225
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1 | aa79e62e | Iustin Pop | {-# LANGUAGE TemplateHaskell #-} |
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2 | aa79e62e | Iustin Pop | |
3 | aa79e62e | Iustin Pop | {-| Implementation of the job queue. |
4 | aa79e62e | Iustin Pop | |
5 | aa79e62e | Iustin Pop | -} |
6 | aa79e62e | Iustin Pop | |
7 | aa79e62e | Iustin Pop | {- |
8 | aa79e62e | Iustin Pop | |
9 | aa79e62e | Iustin Pop | Copyright (C) 2010, 2012 Google Inc. |
10 | aa79e62e | Iustin Pop | |
11 | aa79e62e | Iustin Pop | This program is free software; you can redistribute it and/or modify |
12 | aa79e62e | Iustin Pop | it under the terms of the GNU General Public License as published by |
13 | aa79e62e | Iustin Pop | the Free Software Foundation; either version 2 of the License, or |
14 | aa79e62e | Iustin Pop | (at your option) any later version. |
15 | aa79e62e | Iustin Pop | |
16 | aa79e62e | Iustin Pop | This program is distributed in the hope that it will be useful, but |
17 | aa79e62e | Iustin Pop | WITHOUT ANY WARRANTY; without even the implied warranty of |
18 | aa79e62e | Iustin Pop | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
19 | aa79e62e | Iustin Pop | General Public License for more details. |
20 | aa79e62e | Iustin Pop | |
21 | aa79e62e | Iustin Pop | You should have received a copy of the GNU General Public License |
22 | aa79e62e | Iustin Pop | along with this program; if not, write to the Free Software |
23 | aa79e62e | Iustin Pop | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
24 | aa79e62e | Iustin Pop | 02110-1301, USA. |
25 | aa79e62e | Iustin Pop | |
26 | aa79e62e | Iustin Pop | -} |
27 | aa79e62e | Iustin Pop | |
28 | aa79e62e | Iustin Pop | module Ganeti.JQueue |
29 | aa79e62e | Iustin Pop | ( QueuedOpCode(..) |
30 | aa79e62e | Iustin Pop | , QueuedJob(..) |
31 | aa79e62e | Iustin Pop | , InputOpCode(..) |
32 | 4b49a72b | Klaus Aehlig | , queuedOpCodeFromMetaOpCode |
33 | 1c1132f4 | Klaus Aehlig | , queuedJobFromOpCodes |
34 | 363dc9d6 | Klaus Aehlig | , cancelQueuedJob |
35 | aa79e62e | Iustin Pop | , Timestamp |
36 | aa79e62e | Iustin Pop | , noTimestamp |
37 | c3a70209 | Klaus Aehlig | , currentTimestamp |
38 | 2af22d70 | Klaus Aehlig | , setReceivedTimestamp |
39 | aa79e62e | Iustin Pop | , opStatusFinalized |
40 | aa79e62e | Iustin Pop | , extractOpSummary |
41 | aa79e62e | Iustin Pop | , calcJobStatus |
42 | 02e40b13 | Klaus Aehlig | , jobStarted |
43 | 847df9e9 | Klaus Aehlig | , jobFinalized |
44 | aa79e62e | Iustin Pop | , calcJobPriority |
45 | aa79e62e | Iustin Pop | , jobFileName |
46 | aa79e62e | Iustin Pop | , liveJobFile |
47 | aa79e62e | Iustin Pop | , archivedJobFile |
48 | aa79e62e | Iustin Pop | , determineJobDirectories |
49 | aa79e62e | Iustin Pop | , getJobIDs |
50 | aa79e62e | Iustin Pop | , sortJobIDs |
51 | aa79e62e | Iustin Pop | , loadJobFromDisk |
52 | aa79e62e | Iustin Pop | , noSuchJob |
53 | cef3f99f | Klaus Aehlig | , readSerialFromDisk |
54 | ae858516 | Klaus Aehlig | , allocateJobIds |
55 | ae858516 | Klaus Aehlig | , allocateJobId |
56 | b498ed42 | Klaus Aehlig | , writeJobToDisk |
57 | 9fd653a4 | Klaus Aehlig | , replicateManyJobs |
58 | 1b94c0db | Klaus Aehlig | , isQueueOpen |
59 | ac0c5c6d | Klaus Aehlig | , startJobs |
60 | 47c3c7b1 | Klaus Aehlig | , cancelJob |
61 | aa79e62e | Iustin Pop | ) where |
62 | aa79e62e | Iustin Pop | |
63 | 557f5dad | Klaus Aehlig | import Control.Arrow (second) |
64 | ae858516 | Klaus Aehlig | import Control.Concurrent.MVar |
65 | aa79e62e | Iustin Pop | import Control.Exception |
66 | aa79e62e | Iustin Pop | import Control.Monad |
67 | 557f5dad | Klaus Aehlig | import Data.Functor ((<$)) |
68 | aa79e62e | Iustin Pop | import Data.List |
69 | 4b49a72b | Klaus Aehlig | import Data.Maybe |
70 | aa79e62e | Iustin Pop | import Data.Ord (comparing) |
71 | aa79e62e | Iustin Pop | -- workaround what seems to be a bug in ghc 7.4's TH shadowing code |
72 | 557f5dad | Klaus Aehlig | import Prelude hiding (id, log) |
73 | aa79e62e | Iustin Pop | import System.Directory |
74 | aa79e62e | Iustin Pop | import System.FilePath |
75 | aa79e62e | Iustin Pop | import System.IO.Error (isDoesNotExistError) |
76 | aa79e62e | Iustin Pop | import System.Posix.Files |
77 | c3a70209 | Klaus Aehlig | import System.Time |
78 | aa79e62e | Iustin Pop | import qualified Text.JSON |
79 | aa79e62e | Iustin Pop | import Text.JSON.Types |
80 | aa79e62e | Iustin Pop | |
81 | aa79e62e | Iustin Pop | import Ganeti.BasicTypes |
82 | aa79e62e | Iustin Pop | import qualified Ganeti.Constants as C |
83 | 47c3c7b1 | Klaus Aehlig | import Ganeti.Errors (ErrorResult) |
84 | aa79e62e | Iustin Pop | import Ganeti.JSON |
85 | aa79e62e | Iustin Pop | import Ganeti.Logging |
86 | 493d6920 | Klaus Aehlig | import Ganeti.Luxi |
87 | ae858516 | Klaus Aehlig | import Ganeti.Objects (Node) |
88 | aa79e62e | Iustin Pop | import Ganeti.OpCodes |
89 | aa79e62e | Iustin Pop | import Ganeti.Path |
90 | b5a96995 | Klaus Aehlig | import Ganeti.Rpc (executeRpcCall, ERpcError, logRpcErrors, |
91 | b5a96995 | Klaus Aehlig | RpcCallJobqueueUpdate(..)) |
92 | aa79e62e | Iustin Pop | import Ganeti.THH |
93 | aa79e62e | Iustin Pop | import Ganeti.Types |
94 | cef3f99f | Klaus Aehlig | import Ganeti.Utils |
95 | aa79e62e | Iustin Pop | |
96 | aa79e62e | Iustin Pop | -- * Data types |
97 | aa79e62e | Iustin Pop | |
98 | c3a70209 | Klaus Aehlig | -- | The ganeti queue timestamp type. It represents the time as the pair |
99 | c3a70209 | Klaus Aehlig | -- of seconds since the epoch and microseconds since the beginning of the |
100 | c3a70209 | Klaus Aehlig | -- second. |
101 | aa79e62e | Iustin Pop | type Timestamp = (Int, Int) |
102 | aa79e62e | Iustin Pop | |
103 | aa79e62e | Iustin Pop | -- | Missing timestamp type. |
104 | aa79e62e | Iustin Pop | noTimestamp :: Timestamp |
105 | aa79e62e | Iustin Pop | noTimestamp = (-1, -1) |
106 | aa79e62e | Iustin Pop | |
107 | c3a70209 | Klaus Aehlig | -- | Get the current time in the job-queue timestamp format. |
108 | c3a70209 | Klaus Aehlig | currentTimestamp :: IO Timestamp |
109 | c3a70209 | Klaus Aehlig | currentTimestamp = do |
110 | c3a70209 | Klaus Aehlig | TOD ctime pico <- getClockTime |
111 | c3a70209 | Klaus Aehlig | return (fromIntegral ctime, fromIntegral $ pico `div` 1000000) |
112 | c3a70209 | Klaus Aehlig | |
113 | aa79e62e | Iustin Pop | -- | An input opcode. |
114 | aa79e62e | Iustin Pop | data InputOpCode = ValidOpCode MetaOpCode -- ^ OpCode was parsed successfully |
115 | aa79e62e | Iustin Pop | | InvalidOpCode JSValue -- ^ Invalid opcode |
116 | aa79e62e | Iustin Pop | deriving (Show, Eq) |
117 | aa79e62e | Iustin Pop | |
118 | aa79e62e | Iustin Pop | -- | JSON instance for 'InputOpCode', trying to parse it and if |
119 | aa79e62e | Iustin Pop | -- failing, keeping the original JSValue. |
120 | aa79e62e | Iustin Pop | instance Text.JSON.JSON InputOpCode where |
121 | aa79e62e | Iustin Pop | showJSON (ValidOpCode mo) = Text.JSON.showJSON mo |
122 | aa79e62e | Iustin Pop | showJSON (InvalidOpCode inv) = inv |
123 | aa79e62e | Iustin Pop | readJSON v = case Text.JSON.readJSON v of |
124 | aa79e62e | Iustin Pop | Text.JSON.Error _ -> return $ InvalidOpCode v |
125 | aa79e62e | Iustin Pop | Text.JSON.Ok mo -> return $ ValidOpCode mo |
126 | aa79e62e | Iustin Pop | |
127 | aa79e62e | Iustin Pop | -- | Invalid opcode summary. |
128 | aa79e62e | Iustin Pop | invalidOp :: String |
129 | aa79e62e | Iustin Pop | invalidOp = "INVALID_OP" |
130 | aa79e62e | Iustin Pop | |
131 | aa79e62e | Iustin Pop | -- | Tries to extract the opcode summary from an 'InputOpCode'. This |
132 | aa79e62e | Iustin Pop | -- duplicates some functionality from the 'opSummary' function in |
133 | aa79e62e | Iustin Pop | -- "Ganeti.OpCodes". |
134 | aa79e62e | Iustin Pop | extractOpSummary :: InputOpCode -> String |
135 | aa79e62e | Iustin Pop | extractOpSummary (ValidOpCode metaop) = opSummary $ metaOpCode metaop |
136 | aa79e62e | Iustin Pop | extractOpSummary (InvalidOpCode (JSObject o)) = |
137 | aa79e62e | Iustin Pop | case fromObjWithDefault (fromJSObject o) "OP_ID" ("OP_" ++ invalidOp) of |
138 | aa79e62e | Iustin Pop | Just s -> drop 3 s -- drop the OP_ prefix |
139 | aa79e62e | Iustin Pop | Nothing -> invalidOp |
140 | aa79e62e | Iustin Pop | extractOpSummary _ = invalidOp |
141 | aa79e62e | Iustin Pop | |
142 | aa79e62e | Iustin Pop | $(buildObject "QueuedOpCode" "qo" |
143 | aa79e62e | Iustin Pop | [ simpleField "input" [t| InputOpCode |] |
144 | aa79e62e | Iustin Pop | , simpleField "status" [t| OpStatus |] |
145 | aa79e62e | Iustin Pop | , simpleField "result" [t| JSValue |] |
146 | aa79e62e | Iustin Pop | , defaultField [| [] |] $ |
147 | aa79e62e | Iustin Pop | simpleField "log" [t| [(Int, Timestamp, ELogType, JSValue)] |] |
148 | aa79e62e | Iustin Pop | , simpleField "priority" [t| Int |] |
149 | aa79e62e | Iustin Pop | , optionalNullSerField $ |
150 | aa79e62e | Iustin Pop | simpleField "start_timestamp" [t| Timestamp |] |
151 | aa79e62e | Iustin Pop | , optionalNullSerField $ |
152 | aa79e62e | Iustin Pop | simpleField "exec_timestamp" [t| Timestamp |] |
153 | aa79e62e | Iustin Pop | , optionalNullSerField $ |
154 | aa79e62e | Iustin Pop | simpleField "end_timestamp" [t| Timestamp |] |
155 | aa79e62e | Iustin Pop | ]) |
156 | aa79e62e | Iustin Pop | |
157 | aa79e62e | Iustin Pop | $(buildObject "QueuedJob" "qj" |
158 | aa79e62e | Iustin Pop | [ simpleField "id" [t| JobId |] |
159 | aa79e62e | Iustin Pop | , simpleField "ops" [t| [QueuedOpCode] |] |
160 | aa79e62e | Iustin Pop | , optionalNullSerField $ |
161 | aa79e62e | Iustin Pop | simpleField "received_timestamp" [t| Timestamp |] |
162 | aa79e62e | Iustin Pop | , optionalNullSerField $ |
163 | aa79e62e | Iustin Pop | simpleField "start_timestamp" [t| Timestamp |] |
164 | aa79e62e | Iustin Pop | , optionalNullSerField $ |
165 | aa79e62e | Iustin Pop | simpleField "end_timestamp" [t| Timestamp |] |
166 | aa79e62e | Iustin Pop | ]) |
167 | aa79e62e | Iustin Pop | |
168 | 4b49a72b | Klaus Aehlig | -- | Convenience function to obtain a QueuedOpCode from a MetaOpCode |
169 | 4b49a72b | Klaus Aehlig | queuedOpCodeFromMetaOpCode :: MetaOpCode -> QueuedOpCode |
170 | 4b49a72b | Klaus Aehlig | queuedOpCodeFromMetaOpCode op = |
171 | 4b49a72b | Klaus Aehlig | QueuedOpCode { qoInput = ValidOpCode op |
172 | 4b49a72b | Klaus Aehlig | , qoStatus = OP_STATUS_QUEUED |
173 | 4b49a72b | Klaus Aehlig | , qoPriority = opSubmitPriorityToRaw . opPriority . metaParams |
174 | 4b49a72b | Klaus Aehlig | $ op |
175 | 4b49a72b | Klaus Aehlig | , qoLog = [] |
176 | 4b49a72b | Klaus Aehlig | , qoResult = JSNull |
177 | 4b49a72b | Klaus Aehlig | , qoStartTimestamp = Nothing |
178 | 4b49a72b | Klaus Aehlig | , qoEndTimestamp = Nothing |
179 | 4b49a72b | Klaus Aehlig | , qoExecTimestamp = Nothing |
180 | 4b49a72b | Klaus Aehlig | } |
181 | 4b49a72b | Klaus Aehlig | |
182 | 1c1132f4 | Klaus Aehlig | -- | From a job-id and a list of op-codes create a job. This is |
183 | 1c1132f4 | Klaus Aehlig | -- the pure part of job creation, as allocating a new job id |
184 | 1c1132f4 | Klaus Aehlig | -- lives in IO. |
185 | 1c1132f4 | Klaus Aehlig | queuedJobFromOpCodes :: (Monad m) => JobId -> [MetaOpCode] -> m QueuedJob |
186 | 1c1132f4 | Klaus Aehlig | queuedJobFromOpCodes jobid ops = do |
187 | 1c1132f4 | Klaus Aehlig | ops' <- mapM (`resolveDependencies` jobid) ops |
188 | 1c1132f4 | Klaus Aehlig | return QueuedJob { qjId = jobid |
189 | 1c1132f4 | Klaus Aehlig | , qjOps = map queuedOpCodeFromMetaOpCode ops' |
190 | 1c1132f4 | Klaus Aehlig | , qjReceivedTimestamp = Nothing |
191 | 1c1132f4 | Klaus Aehlig | , qjStartTimestamp = Nothing |
192 | 1c1132f4 | Klaus Aehlig | , qjEndTimestamp = Nothing |
193 | 1c1132f4 | Klaus Aehlig | } |
194 | 1c1132f4 | Klaus Aehlig | |
195 | 2af22d70 | Klaus Aehlig | -- | Attach a received timestamp to a Queued Job. |
196 | 2af22d70 | Klaus Aehlig | setReceivedTimestamp :: Timestamp -> QueuedJob -> QueuedJob |
197 | 2af22d70 | Klaus Aehlig | setReceivedTimestamp ts job = job { qjReceivedTimestamp = Just ts } |
198 | 2af22d70 | Klaus Aehlig | |
199 | 363dc9d6 | Klaus Aehlig | -- | Set the state of a QueuedOpCode to canceled. |
200 | 363dc9d6 | Klaus Aehlig | cancelOpCode :: Timestamp -> QueuedOpCode -> QueuedOpCode |
201 | 363dc9d6 | Klaus Aehlig | cancelOpCode now op = |
202 | 363dc9d6 | Klaus Aehlig | op { qoStatus = OP_STATUS_CANCELED, qoEndTimestamp = Just now } |
203 | 363dc9d6 | Klaus Aehlig | |
204 | 363dc9d6 | Klaus Aehlig | -- | Transform a QueuedJob that has not been started into its canceled form. |
205 | 363dc9d6 | Klaus Aehlig | cancelQueuedJob :: Timestamp -> QueuedJob -> QueuedJob |
206 | 363dc9d6 | Klaus Aehlig | cancelQueuedJob now job = |
207 | 363dc9d6 | Klaus Aehlig | let ops' = map (cancelOpCode now) $ qjOps job |
208 | 363dc9d6 | Klaus Aehlig | in job { qjOps = ops', qjEndTimestamp = Just now} |
209 | 363dc9d6 | Klaus Aehlig | |
210 | aa79e62e | Iustin Pop | -- | Job file prefix. |
211 | aa79e62e | Iustin Pop | jobFilePrefix :: String |
212 | aa79e62e | Iustin Pop | jobFilePrefix = "job-" |
213 | aa79e62e | Iustin Pop | |
214 | aa79e62e | Iustin Pop | -- | Computes the filename for a given job ID. |
215 | aa79e62e | Iustin Pop | jobFileName :: JobId -> FilePath |
216 | aa79e62e | Iustin Pop | jobFileName jid = jobFilePrefix ++ show (fromJobId jid) |
217 | aa79e62e | Iustin Pop | |
218 | aa79e62e | Iustin Pop | -- | Parses a job ID from a file name. |
219 | aa79e62e | Iustin Pop | parseJobFileId :: (Monad m) => FilePath -> m JobId |
220 | aa79e62e | Iustin Pop | parseJobFileId path = |
221 | aa79e62e | Iustin Pop | case stripPrefix jobFilePrefix path of |
222 | aa79e62e | Iustin Pop | Nothing -> fail $ "Job file '" ++ path ++ |
223 | aa79e62e | Iustin Pop | "' doesn't have the correct prefix" |
224 | aa79e62e | Iustin Pop | Just suffix -> makeJobIdS suffix |
225 | aa79e62e | Iustin Pop | |
226 | aa79e62e | Iustin Pop | -- | Computes the full path to a live job. |
227 | aa79e62e | Iustin Pop | liveJobFile :: FilePath -> JobId -> FilePath |
228 | aa79e62e | Iustin Pop | liveJobFile rootdir jid = rootdir </> jobFileName jid |
229 | aa79e62e | Iustin Pop | |
230 | aa79e62e | Iustin Pop | -- | Computes the full path to an archives job. BROKEN. |
231 | aa79e62e | Iustin Pop | archivedJobFile :: FilePath -> JobId -> FilePath |
232 | aa79e62e | Iustin Pop | archivedJobFile rootdir jid = |
233 | aa79e62e | Iustin Pop | let subdir = show (fromJobId jid `div` C.jstoreJobsPerArchiveDirectory) |
234 | aa79e62e | Iustin Pop | in rootdir </> jobQueueArchiveSubDir </> subdir </> jobFileName jid |
235 | aa79e62e | Iustin Pop | |
236 | aa79e62e | Iustin Pop | -- | Map from opcode status to job status. |
237 | aa79e62e | Iustin Pop | opStatusToJob :: OpStatus -> JobStatus |
238 | aa79e62e | Iustin Pop | opStatusToJob OP_STATUS_QUEUED = JOB_STATUS_QUEUED |
239 | aa79e62e | Iustin Pop | opStatusToJob OP_STATUS_WAITING = JOB_STATUS_WAITING |
240 | aa79e62e | Iustin Pop | opStatusToJob OP_STATUS_SUCCESS = JOB_STATUS_SUCCESS |
241 | aa79e62e | Iustin Pop | opStatusToJob OP_STATUS_RUNNING = JOB_STATUS_RUNNING |
242 | aa79e62e | Iustin Pop | opStatusToJob OP_STATUS_CANCELING = JOB_STATUS_CANCELING |
243 | aa79e62e | Iustin Pop | opStatusToJob OP_STATUS_CANCELED = JOB_STATUS_CANCELED |
244 | aa79e62e | Iustin Pop | opStatusToJob OP_STATUS_ERROR = JOB_STATUS_ERROR |
245 | aa79e62e | Iustin Pop | |
246 | aa79e62e | Iustin Pop | -- | Computes a queued job's status. |
247 | aa79e62e | Iustin Pop | calcJobStatus :: QueuedJob -> JobStatus |
248 | aa79e62e | Iustin Pop | calcJobStatus QueuedJob { qjOps = ops } = |
249 | aa79e62e | Iustin Pop | extractOpSt (map qoStatus ops) JOB_STATUS_QUEUED True |
250 | aa79e62e | Iustin Pop | where |
251 | aa79e62e | Iustin Pop | terminalStatus OP_STATUS_ERROR = True |
252 | aa79e62e | Iustin Pop | terminalStatus OP_STATUS_CANCELING = True |
253 | aa79e62e | Iustin Pop | terminalStatus OP_STATUS_CANCELED = True |
254 | aa79e62e | Iustin Pop | terminalStatus _ = False |
255 | aa79e62e | Iustin Pop | softStatus OP_STATUS_SUCCESS = True |
256 | aa79e62e | Iustin Pop | softStatus OP_STATUS_QUEUED = True |
257 | aa79e62e | Iustin Pop | softStatus _ = False |
258 | aa79e62e | Iustin Pop | extractOpSt [] _ True = JOB_STATUS_SUCCESS |
259 | aa79e62e | Iustin Pop | extractOpSt [] d False = d |
260 | aa79e62e | Iustin Pop | extractOpSt (x:xs) d old_all |
261 | aa79e62e | Iustin Pop | | terminalStatus x = opStatusToJob x -- abort recursion |
262 | aa79e62e | Iustin Pop | | softStatus x = extractOpSt xs d new_all -- continue unchanged |
263 | aa79e62e | Iustin Pop | | otherwise = extractOpSt xs (opStatusToJob x) new_all |
264 | aa79e62e | Iustin Pop | where new_all = x == OP_STATUS_SUCCESS && old_all |
265 | aa79e62e | Iustin Pop | |
266 | 02e40b13 | Klaus Aehlig | -- | Determine if a job has started |
267 | 02e40b13 | Klaus Aehlig | jobStarted :: QueuedJob -> Bool |
268 | 02e40b13 | Klaus Aehlig | jobStarted = (> JOB_STATUS_QUEUED) . calcJobStatus |
269 | 02e40b13 | Klaus Aehlig | |
270 | 847df9e9 | Klaus Aehlig | -- | Determine if a job is finalised. |
271 | 847df9e9 | Klaus Aehlig | jobFinalized :: QueuedJob -> Bool |
272 | 847df9e9 | Klaus Aehlig | jobFinalized = (> JOB_STATUS_RUNNING) . calcJobStatus |
273 | 847df9e9 | Klaus Aehlig | |
274 | aa79e62e | Iustin Pop | -- | Determine whether an opcode status is finalized. |
275 | aa79e62e | Iustin Pop | opStatusFinalized :: OpStatus -> Bool |
276 | aa79e62e | Iustin Pop | opStatusFinalized = (> OP_STATUS_RUNNING) |
277 | aa79e62e | Iustin Pop | |
278 | aa79e62e | Iustin Pop | -- | Compute a job's priority. |
279 | aa79e62e | Iustin Pop | calcJobPriority :: QueuedJob -> Int |
280 | aa79e62e | Iustin Pop | calcJobPriority QueuedJob { qjOps = ops } = |
281 | aa79e62e | Iustin Pop | helper . map qoPriority $ filter (not . opStatusFinalized . qoStatus) ops |
282 | aa79e62e | Iustin Pop | where helper [] = C.opPrioDefault |
283 | aa79e62e | Iustin Pop | helper ps = minimum ps |
284 | aa79e62e | Iustin Pop | |
285 | aa79e62e | Iustin Pop | -- | Log but ignore an 'IOError'. |
286 | aa79e62e | Iustin Pop | ignoreIOError :: a -> Bool -> String -> IOError -> IO a |
287 | aa79e62e | Iustin Pop | ignoreIOError a ignore_noent msg e = do |
288 | aa79e62e | Iustin Pop | unless (isDoesNotExistError e && ignore_noent) . |
289 | aa79e62e | Iustin Pop | logWarning $ msg ++ ": " ++ show e |
290 | aa79e62e | Iustin Pop | return a |
291 | aa79e62e | Iustin Pop | |
292 | aa79e62e | Iustin Pop | -- | Compute the list of existing archive directories. Note that I/O |
293 | aa79e62e | Iustin Pop | -- exceptions are swallowed and ignored. |
294 | aa79e62e | Iustin Pop | allArchiveDirs :: FilePath -> IO [FilePath] |
295 | aa79e62e | Iustin Pop | allArchiveDirs rootdir = do |
296 | aa79e62e | Iustin Pop | let adir = rootdir </> jobQueueArchiveSubDir |
297 | aa79e62e | Iustin Pop | contents <- getDirectoryContents adir `Control.Exception.catch` |
298 | aa79e62e | Iustin Pop | ignoreIOError [] False |
299 | aa79e62e | Iustin Pop | ("Failed to list queue directory " ++ adir) |
300 | aa79e62e | Iustin Pop | let fpaths = map (adir </>) $ filter (not . ("." `isPrefixOf`)) contents |
301 | aa79e62e | Iustin Pop | filterM (\path -> |
302 | aa79e62e | Iustin Pop | liftM isDirectory (getFileStatus (adir </> path)) |
303 | aa79e62e | Iustin Pop | `Control.Exception.catch` |
304 | aa79e62e | Iustin Pop | ignoreIOError False True |
305 | aa79e62e | Iustin Pop | ("Failed to stat archive path " ++ path)) fpaths |
306 | aa79e62e | Iustin Pop | |
307 | aa79e62e | Iustin Pop | -- | Build list of directories containing job files. Note: compared to |
308 | aa79e62e | Iustin Pop | -- the Python version, this doesn't ignore a potential lost+found |
309 | aa79e62e | Iustin Pop | -- file. |
310 | aa79e62e | Iustin Pop | determineJobDirectories :: FilePath -> Bool -> IO [FilePath] |
311 | aa79e62e | Iustin Pop | determineJobDirectories rootdir archived = do |
312 | aa79e62e | Iustin Pop | other <- if archived |
313 | aa79e62e | Iustin Pop | then allArchiveDirs rootdir |
314 | aa79e62e | Iustin Pop | else return [] |
315 | aa79e62e | Iustin Pop | return $ rootdir:other |
316 | aa79e62e | Iustin Pop | |
317 | 3cecd73c | Michele Tartara | -- Function equivalent to the \'sequence\' function, that cannot be used because |
318 | 3cecd73c | Michele Tartara | -- of library version conflict on Lucid. |
319 | 3cecd73c | Michele Tartara | -- FIXME: delete this and just use \'sequence\' instead when Lucid compatibility |
320 | 3cecd73c | Michele Tartara | -- will not be required anymore. |
321 | 3cecd73c | Michele Tartara | sequencer :: [Either IOError [JobId]] -> Either IOError [[JobId]] |
322 | 3cecd73c | Michele Tartara | sequencer l = fmap reverse $ foldl seqFolder (Right []) l |
323 | 3cecd73c | Michele Tartara | |
324 | 3cecd73c | Michele Tartara | -- | Folding function for joining multiple [JobIds] into one list. |
325 | 3cecd73c | Michele Tartara | seqFolder :: Either IOError [[JobId]] |
326 | 3cecd73c | Michele Tartara | -> Either IOError [JobId] |
327 | 3cecd73c | Michele Tartara | -> Either IOError [[JobId]] |
328 | 3cecd73c | Michele Tartara | seqFolder (Left e) _ = Left e |
329 | 3cecd73c | Michele Tartara | seqFolder (Right _) (Left e) = Left e |
330 | 3cecd73c | Michele Tartara | seqFolder (Right l) (Right el) = Right $ el:l |
331 | 3cecd73c | Michele Tartara | |
332 | aa79e62e | Iustin Pop | -- | Computes the list of all jobs in the given directories. |
333 | be0cb2d7 | Michele Tartara | getJobIDs :: [FilePath] -> IO (Either IOError [JobId]) |
334 | 3cecd73c | Michele Tartara | getJobIDs paths = liftM (fmap concat . sequencer) (mapM getDirJobIDs paths) |
335 | aa79e62e | Iustin Pop | |
336 | aa79e62e | Iustin Pop | -- | Sorts the a list of job IDs. |
337 | aa79e62e | Iustin Pop | sortJobIDs :: [JobId] -> [JobId] |
338 | aa79e62e | Iustin Pop | sortJobIDs = sortBy (comparing fromJobId) |
339 | aa79e62e | Iustin Pop | |
340 | aa79e62e | Iustin Pop | -- | Computes the list of jobs in a given directory. |
341 | be0cb2d7 | Michele Tartara | getDirJobIDs :: FilePath -> IO (Either IOError [JobId]) |
342 | aa79e62e | Iustin Pop | getDirJobIDs path = do |
343 | be0cb2d7 | Michele Tartara | either_contents <- |
344 | be0cb2d7 | Michele Tartara | try (getDirectoryContents path) :: IO (Either IOError [FilePath]) |
345 | be0cb2d7 | Michele Tartara | case either_contents of |
346 | be0cb2d7 | Michele Tartara | Left e -> do |
347 | be0cb2d7 | Michele Tartara | logWarning $ "Failed to list job directory " ++ path ++ ": " ++ show e |
348 | be0cb2d7 | Michele Tartara | return $ Left e |
349 | be0cb2d7 | Michele Tartara | Right contents -> do |
350 | be0cb2d7 | Michele Tartara | let jids = foldl (\ids file -> |
351 | be0cb2d7 | Michele Tartara | case parseJobFileId file of |
352 | be0cb2d7 | Michele Tartara | Nothing -> ids |
353 | be0cb2d7 | Michele Tartara | Just new_id -> new_id:ids) [] contents |
354 | be0cb2d7 | Michele Tartara | return . Right $ reverse jids |
355 | aa79e62e | Iustin Pop | |
356 | aa79e62e | Iustin Pop | -- | Reads the job data from disk. |
357 | aa79e62e | Iustin Pop | readJobDataFromDisk :: FilePath -> Bool -> JobId -> IO (Maybe (String, Bool)) |
358 | aa79e62e | Iustin Pop | readJobDataFromDisk rootdir archived jid = do |
359 | aa79e62e | Iustin Pop | let live_path = liveJobFile rootdir jid |
360 | aa79e62e | Iustin Pop | archived_path = archivedJobFile rootdir jid |
361 | aa79e62e | Iustin Pop | all_paths = if archived |
362 | aa79e62e | Iustin Pop | then [(live_path, False), (archived_path, True)] |
363 | aa79e62e | Iustin Pop | else [(live_path, False)] |
364 | aa79e62e | Iustin Pop | foldM (\state (path, isarchived) -> |
365 | aa79e62e | Iustin Pop | liftM (\r -> Just (r, isarchived)) (readFile path) |
366 | aa79e62e | Iustin Pop | `Control.Exception.catch` |
367 | aa79e62e | Iustin Pop | ignoreIOError state True |
368 | aa79e62e | Iustin Pop | ("Failed to read job file " ++ path)) Nothing all_paths |
369 | aa79e62e | Iustin Pop | |
370 | aa79e62e | Iustin Pop | -- | Failed to load job error. |
371 | aa79e62e | Iustin Pop | noSuchJob :: Result (QueuedJob, Bool) |
372 | aa79e62e | Iustin Pop | noSuchJob = Bad "Can't load job file" |
373 | aa79e62e | Iustin Pop | |
374 | aa79e62e | Iustin Pop | -- | Loads a job from disk. |
375 | aa79e62e | Iustin Pop | loadJobFromDisk :: FilePath -> Bool -> JobId -> IO (Result (QueuedJob, Bool)) |
376 | aa79e62e | Iustin Pop | loadJobFromDisk rootdir archived jid = do |
377 | aa79e62e | Iustin Pop | raw <- readJobDataFromDisk rootdir archived jid |
378 | aa79e62e | Iustin Pop | -- note: we need some stricness below, otherwise the wrapping in a |
379 | aa79e62e | Iustin Pop | -- Result will create too much lazyness, and not close the file |
380 | aa79e62e | Iustin Pop | -- descriptors for the individual jobs |
381 | aa79e62e | Iustin Pop | return $! case raw of |
382 | aa79e62e | Iustin Pop | Nothing -> noSuchJob |
383 | aa79e62e | Iustin Pop | Just (str, arch) -> |
384 | aa79e62e | Iustin Pop | liftM (\qj -> (qj, arch)) . |
385 | aa79e62e | Iustin Pop | fromJResult "Parsing job file" $ Text.JSON.decode str |
386 | cef3f99f | Klaus Aehlig | |
387 | b498ed42 | Klaus Aehlig | -- | Write a job to disk. |
388 | b498ed42 | Klaus Aehlig | writeJobToDisk :: FilePath -> QueuedJob -> IO (Result ()) |
389 | b498ed42 | Klaus Aehlig | writeJobToDisk rootdir job = do |
390 | b498ed42 | Klaus Aehlig | let filename = liveJobFile rootdir . qjId $ job |
391 | b498ed42 | Klaus Aehlig | content = Text.JSON.encode . Text.JSON.showJSON $ job |
392 | b498ed42 | Klaus Aehlig | tryAndLogIOError (atomicWriteFile filename content) |
393 | b498ed42 | Klaus Aehlig | ("Failed to write " ++ filename) Ok |
394 | b498ed42 | Klaus Aehlig | |
395 | b5a96995 | Klaus Aehlig | -- | Replicate a job to all master candidates. |
396 | b5a96995 | Klaus Aehlig | replicateJob :: FilePath -> [Node] -> QueuedJob -> IO [(Node, ERpcError ())] |
397 | b5a96995 | Klaus Aehlig | replicateJob rootdir mastercandidates job = do |
398 | b5a96995 | Klaus Aehlig | let filename = liveJobFile rootdir . qjId $ job |
399 | b5a96995 | Klaus Aehlig | content = Text.JSON.encode . Text.JSON.showJSON $ job |
400 | 557f5dad | Klaus Aehlig | callresult <- executeRpcCall mastercandidates |
401 | 557f5dad | Klaus Aehlig | $ RpcCallJobqueueUpdate filename content |
402 | 557f5dad | Klaus Aehlig | let result = map (second (() <$)) callresult |
403 | b5a96995 | Klaus Aehlig | logRpcErrors result |
404 | b5a96995 | Klaus Aehlig | return result |
405 | b5a96995 | Klaus Aehlig | |
406 | 9fd653a4 | Klaus Aehlig | -- | Replicate many jobs to all master candidates. |
407 | 9fd653a4 | Klaus Aehlig | replicateManyJobs :: FilePath -> [Node] -> [QueuedJob] -> IO () |
408 | 9fd653a4 | Klaus Aehlig | replicateManyJobs rootdir mastercandidates = |
409 | 9fd653a4 | Klaus Aehlig | mapM_ (replicateJob rootdir mastercandidates) |
410 | 9fd653a4 | Klaus Aehlig | |
411 | cef3f99f | Klaus Aehlig | -- | Read the job serial number from disk. |
412 | cef3f99f | Klaus Aehlig | readSerialFromDisk :: IO (Result JobId) |
413 | cef3f99f | Klaus Aehlig | readSerialFromDisk = do |
414 | cef3f99f | Klaus Aehlig | filename <- jobQueueSerialFile |
415 | cef3f99f | Klaus Aehlig | tryAndLogIOError (readFile filename) "Failed to read serial file" |
416 | cef3f99f | Klaus Aehlig | (makeJobIdS . rStripSpace) |
417 | ae858516 | Klaus Aehlig | |
418 | ae858516 | Klaus Aehlig | -- | Allocate new job ids. |
419 | ae858516 | Klaus Aehlig | -- To avoid races while accessing the serial file, the threads synchronize |
420 | ae858516 | Klaus Aehlig | -- over a lock, as usual provided by an MVar. |
421 | ae858516 | Klaus Aehlig | allocateJobIds :: [Node] -> MVar () -> Int -> IO (Result [JobId]) |
422 | ae858516 | Klaus Aehlig | allocateJobIds mastercandidates lock n = |
423 | ae858516 | Klaus Aehlig | if n <= 0 |
424 | ae858516 | Klaus Aehlig | then return . Bad $ "Can only allocate positive number of job ids" |
425 | ae858516 | Klaus Aehlig | else do |
426 | ae858516 | Klaus Aehlig | takeMVar lock |
427 | ae858516 | Klaus Aehlig | rjobid <- readSerialFromDisk |
428 | ae858516 | Klaus Aehlig | case rjobid of |
429 | ae858516 | Klaus Aehlig | Bad s -> do |
430 | ae858516 | Klaus Aehlig | putMVar lock () |
431 | ae858516 | Klaus Aehlig | return . Bad $ s |
432 | ae858516 | Klaus Aehlig | Ok jid -> do |
433 | ae858516 | Klaus Aehlig | let current = fromJobId jid |
434 | ae858516 | Klaus Aehlig | serial_content = show (current + n) ++ "\n" |
435 | ae858516 | Klaus Aehlig | serial <- jobQueueSerialFile |
436 | ae858516 | Klaus Aehlig | write_result <- try $ atomicWriteFile serial serial_content |
437 | ae858516 | Klaus Aehlig | :: IO (Either IOError ()) |
438 | ae858516 | Klaus Aehlig | case write_result of |
439 | ae858516 | Klaus Aehlig | Left e -> do |
440 | f7819050 | Klaus Aehlig | putMVar lock () |
441 | ae858516 | Klaus Aehlig | let msg = "Failed to write serial file: " ++ show e |
442 | ae858516 | Klaus Aehlig | logError msg |
443 | ae858516 | Klaus Aehlig | return . Bad $ msg |
444 | ae858516 | Klaus Aehlig | Right () -> do |
445 | ae858516 | Klaus Aehlig | _ <- executeRpcCall mastercandidates |
446 | ae858516 | Klaus Aehlig | $ RpcCallJobqueueUpdate serial serial_content |
447 | f7819050 | Klaus Aehlig | putMVar lock () |
448 | ae858516 | Klaus Aehlig | return $ mapM makeJobId [(current+1)..(current+n)] |
449 | ae858516 | Klaus Aehlig | |
450 | ae858516 | Klaus Aehlig | -- | Allocate one new job id. |
451 | ae858516 | Klaus Aehlig | allocateJobId :: [Node] -> MVar () -> IO (Result JobId) |
452 | ae858516 | Klaus Aehlig | allocateJobId mastercandidates lock = do |
453 | ae858516 | Klaus Aehlig | jids <- allocateJobIds mastercandidates lock 1 |
454 | ae858516 | Klaus Aehlig | return (jids >>= monadicThe "Failed to allocate precisely one Job ID") |
455 | 1b94c0db | Klaus Aehlig | |
456 | 1b94c0db | Klaus Aehlig | -- | Decide if job queue is open |
457 | 1b94c0db | Klaus Aehlig | isQueueOpen :: IO Bool |
458 | 1b94c0db | Klaus Aehlig | isQueueOpen = liftM not (jobQueueDrainFile >>= doesFileExist) |
459 | 493d6920 | Klaus Aehlig | |
460 | ac0c5c6d | Klaus Aehlig | -- | Start enqueued jobs, currently by handing them over to masterd. |
461 | ac0c5c6d | Klaus Aehlig | startJobs :: [QueuedJob] -> IO () |
462 | ac0c5c6d | Klaus Aehlig | startJobs jobs = do |
463 | 493d6920 | Klaus Aehlig | socketpath <- defaultMasterSocket |
464 | d605e261 | Petr Pudlak | client <- getLuxiClient socketpath |
465 | 493d6920 | Klaus Aehlig | pickupResults <- mapM (flip callMethod client . PickupJob . qjId) jobs |
466 | 493d6920 | Klaus Aehlig | let failures = map show $ justBad pickupResults |
467 | 493d6920 | Klaus Aehlig | unless (null failures) |
468 | 493d6920 | Klaus Aehlig | . logWarning . (++) "Failed to notify masterd: " . commaJoin $ failures |
469 | 47c3c7b1 | Klaus Aehlig | |
470 | 47c3c7b1 | Klaus Aehlig | -- | Try to cancel a job that has already been handed over to execution, |
471 | 47c3c7b1 | Klaus Aehlig | -- currently by asking masterd to cancel it. |
472 | 47c3c7b1 | Klaus Aehlig | cancelJob :: JobId -> IO (ErrorResult JSValue) |
473 | 47c3c7b1 | Klaus Aehlig | cancelJob jid = do |
474 | 47c3c7b1 | Klaus Aehlig | socketpath <- defaultMasterSocket |
475 | 47c3c7b1 | Klaus Aehlig | client <- getLuxiClient socketpath |
476 | 47c3c7b1 | Klaus Aehlig | callMethod (CancelJob jid) client |