root / htools / Ganeti / Luxi.hs @ 13f2321c
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1 | a0090487 | Agata Murawska | {-# LANGUAGE TemplateHaskell #-} |
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2 | a0090487 | Agata Murawska | |
3 | 6583e677 | Iustin Pop | {-| Implementation of the Ganeti LUXI interface. |
4 | 6583e677 | Iustin Pop | |
5 | 6583e677 | Iustin Pop | -} |
6 | 6583e677 | Iustin Pop | |
7 | 6583e677 | Iustin Pop | {- |
8 | 6583e677 | Iustin Pop | |
9 | fae980e5 | Iustin Pop | Copyright (C) 2009, 2010, 2011, 2012 Google Inc. |
10 | 6583e677 | Iustin Pop | |
11 | 6583e677 | Iustin Pop | This program is free software; you can redistribute it and/or modify |
12 | 6583e677 | Iustin Pop | it under the terms of the GNU General Public License as published by |
13 | 6583e677 | Iustin Pop | the Free Software Foundation; either version 2 of the License, or |
14 | 6583e677 | Iustin Pop | (at your option) any later version. |
15 | 6583e677 | Iustin Pop | |
16 | 6583e677 | Iustin Pop | This program is distributed in the hope that it will be useful, but |
17 | 6583e677 | Iustin Pop | WITHOUT ANY WARRANTY; without even the implied warranty of |
18 | 6583e677 | Iustin Pop | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
19 | 6583e677 | Iustin Pop | General Public License for more details. |
20 | 6583e677 | Iustin Pop | |
21 | 6583e677 | Iustin Pop | You should have received a copy of the GNU General Public License |
22 | 6583e677 | Iustin Pop | along with this program; if not, write to the Free Software |
23 | 6583e677 | Iustin Pop | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
24 | 6583e677 | Iustin Pop | 02110-1301, USA. |
25 | 6583e677 | Iustin Pop | |
26 | 6583e677 | Iustin Pop | -} |
27 | 6583e677 | Iustin Pop | |
28 | 6583e677 | Iustin Pop | module Ganeti.Luxi |
29 | ebf38064 | Iustin Pop | ( LuxiOp(..) |
30 | ebf38064 | Iustin Pop | , QrViaLuxi(..) |
31 | ebf38064 | Iustin Pop | , ResultStatus(..) |
32 | 95d0d502 | Iustin Pop | , LuxiReq(..) |
33 | ebf38064 | Iustin Pop | , Client |
34 | ccc817a2 | Iustin Pop | , JobId |
35 | ebf38064 | Iustin Pop | , checkRS |
36 | ebf38064 | Iustin Pop | , getClient |
37 | 13f2321c | Iustin Pop | , getServer |
38 | 13f2321c | Iustin Pop | , acceptClient |
39 | ebf38064 | Iustin Pop | , closeClient |
40 | ebf38064 | Iustin Pop | , callMethod |
41 | ebf38064 | Iustin Pop | , submitManyJobs |
42 | ebf38064 | Iustin Pop | , queryJobsStatus |
43 | cdd495ae | Iustin Pop | , buildCall |
44 | cdd495ae | Iustin Pop | , validateCall |
45 | cdd495ae | Iustin Pop | , decodeCall |
46 | 13f2321c | Iustin Pop | , recvMsg |
47 | 13f2321c | Iustin Pop | , sendMsg |
48 | ebf38064 | Iustin Pop | ) where |
49 | 6583e677 | Iustin Pop | |
50 | 6583e677 | Iustin Pop | import Data.IORef |
51 | 76b62028 | Iustin Pop | import Data.Ratio (numerator, denominator) |
52 | e821050d | Iustin Pop | import qualified Data.ByteString as B |
53 | e821050d | Iustin Pop | import qualified Data.ByteString.UTF8 as UTF8 |
54 | e821050d | Iustin Pop | import Data.Word (Word8) |
55 | 6583e677 | Iustin Pop | import Control.Monad |
56 | 0903280b | Iustin Pop | import Text.JSON (encodeStrict, decodeStrict) |
57 | 6583e677 | Iustin Pop | import qualified Text.JSON as J |
58 | 6583e677 | Iustin Pop | import Text.JSON.Types |
59 | e821050d | Iustin Pop | import System.IO (hClose, hFlush, hWaitForInput, Handle, IOMode(..)) |
60 | 6583e677 | Iustin Pop | import System.Timeout |
61 | 6583e677 | Iustin Pop | import qualified Network.Socket as S |
62 | 6583e677 | Iustin Pop | |
63 | b69be409 | Iustin Pop | import Ganeti.HTools.JSON |
64 | 6583e677 | Iustin Pop | import Ganeti.HTools.Types |
65 | cdd495ae | Iustin Pop | import Ganeti.HTools.Utils |
66 | 6583e677 | Iustin Pop | |
67 | 92678b3c | Iustin Pop | import Ganeti.Constants |
68 | 9a2ff880 | Iustin Pop | import Ganeti.Jobs (JobStatus) |
69 | 683b1ca7 | Iustin Pop | import Ganeti.OpCodes (OpCode) |
70 | a0090487 | Agata Murawska | import Ganeti.THH |
71 | 9a2ff880 | Iustin Pop | |
72 | 6583e677 | Iustin Pop | -- * Utility functions |
73 | 6583e677 | Iustin Pop | |
74 | 6583e677 | Iustin Pop | -- | Wrapper over System.Timeout.timeout that fails in the IO monad. |
75 | 6583e677 | Iustin Pop | withTimeout :: Int -> String -> IO a -> IO a |
76 | 6583e677 | Iustin Pop | withTimeout secs descr action = do |
77 | ebf38064 | Iustin Pop | result <- timeout (secs * 1000000) action |
78 | 3603605a | Iustin Pop | case result of |
79 | 3603605a | Iustin Pop | Nothing -> fail $ "Timeout in " ++ descr |
80 | 3603605a | Iustin Pop | Just v -> return v |
81 | 6583e677 | Iustin Pop | |
82 | 6583e677 | Iustin Pop | -- * Generic protocol functionality |
83 | 6583e677 | Iustin Pop | |
84 | ccc817a2 | Iustin Pop | -- | The Ganeti job type. |
85 | 76b62028 | Iustin Pop | type JobId = Int |
86 | ccc817a2 | Iustin Pop | |
87 | 92678b3c | Iustin Pop | $(declareSADT "QrViaLuxi" |
88 | ebf38064 | Iustin Pop | [ ("QRLock", 'qrLock) |
89 | ebf38064 | Iustin Pop | , ("QRInstance", 'qrInstance) |
90 | ebf38064 | Iustin Pop | , ("QRNode", 'qrNode) |
91 | ebf38064 | Iustin Pop | , ("QRGroup", 'qrGroup) |
92 | ebf38064 | Iustin Pop | , ("QROs", 'qrOs) |
93 | ebf38064 | Iustin Pop | ]) |
94 | 92678b3c | Iustin Pop | $(makeJSONInstance ''QrViaLuxi) |
95 | 92678b3c | Iustin Pop | |
96 | a0090487 | Agata Murawska | -- | Currently supported Luxi operations and JSON serialization. |
97 | a0090487 | Agata Murawska | $(genLuxiOp "LuxiOp" |
98 | fae980e5 | Iustin Pop | [(luxiReqQuery, |
99 | ebf38064 | Iustin Pop | [ ("what", [t| QrViaLuxi |], [| id |]) |
100 | ebf38064 | Iustin Pop | , ("fields", [t| [String] |], [| id |]) |
101 | ebf38064 | Iustin Pop | , ("qfilter", [t| () |], [| const JSNull |]) |
102 | ebf38064 | Iustin Pop | ]) |
103 | fae980e5 | Iustin Pop | , (luxiReqQueryNodes, |
104 | ebf38064 | Iustin Pop | [ ("names", [t| [String] |], [| id |]) |
105 | ebf38064 | Iustin Pop | , ("fields", [t| [String] |], [| id |]) |
106 | ebf38064 | Iustin Pop | , ("lock", [t| Bool |], [| id |]) |
107 | ebf38064 | Iustin Pop | ]) |
108 | fae980e5 | Iustin Pop | , (luxiReqQueryGroups, |
109 | ebf38064 | Iustin Pop | [ ("names", [t| [String] |], [| id |]) |
110 | ebf38064 | Iustin Pop | , ("fields", [t| [String] |], [| id |]) |
111 | ebf38064 | Iustin Pop | , ("lock", [t| Bool |], [| id |]) |
112 | ebf38064 | Iustin Pop | ]) |
113 | fae980e5 | Iustin Pop | , (luxiReqQueryInstances, |
114 | ebf38064 | Iustin Pop | [ ("names", [t| [String] |], [| id |]) |
115 | ebf38064 | Iustin Pop | , ("fields", [t| [String] |], [| id |]) |
116 | ebf38064 | Iustin Pop | , ("lock", [t| Bool |], [| id |]) |
117 | ebf38064 | Iustin Pop | ]) |
118 | fae980e5 | Iustin Pop | , (luxiReqQueryJobs, |
119 | 76b62028 | Iustin Pop | [ ("ids", [t| [Int] |], [| id |]) |
120 | ebf38064 | Iustin Pop | , ("fields", [t| [String] |], [| id |]) |
121 | ebf38064 | Iustin Pop | ]) |
122 | fae980e5 | Iustin Pop | , (luxiReqQueryExports, |
123 | ebf38064 | Iustin Pop | [ ("nodes", [t| [String] |], [| id |]) |
124 | ebf38064 | Iustin Pop | , ("lock", [t| Bool |], [| id |]) |
125 | ebf38064 | Iustin Pop | ]) |
126 | fae980e5 | Iustin Pop | , (luxiReqQueryConfigValues, |
127 | ebf38064 | Iustin Pop | [ ("fields", [t| [String] |], [| id |]) ] |
128 | ebf38064 | Iustin Pop | ) |
129 | fae980e5 | Iustin Pop | , (luxiReqQueryClusterInfo, []) |
130 | fae980e5 | Iustin Pop | , (luxiReqQueryTags, |
131 | ebf38064 | Iustin Pop | [ ("kind", [t| String |], [| id |]) |
132 | ebf38064 | Iustin Pop | , ("name", [t| String |], [| id |]) |
133 | ebf38064 | Iustin Pop | ]) |
134 | fae980e5 | Iustin Pop | , (luxiReqSubmitJob, |
135 | ebf38064 | Iustin Pop | [ ("job", [t| [OpCode] |], [| id |]) ] |
136 | ebf38064 | Iustin Pop | ) |
137 | fae980e5 | Iustin Pop | , (luxiReqSubmitManyJobs, |
138 | ebf38064 | Iustin Pop | [ ("ops", [t| [[OpCode]] |], [| id |]) ] |
139 | ebf38064 | Iustin Pop | ) |
140 | fae980e5 | Iustin Pop | , (luxiReqWaitForJobChange, |
141 | 76b62028 | Iustin Pop | [ ("job", [t| Int |], [| id |]) |
142 | ebf38064 | Iustin Pop | , ("fields", [t| [String]|], [| id |]) |
143 | ebf38064 | Iustin Pop | , ("prev_job", [t| JSValue |], [| id |]) |
144 | ebf38064 | Iustin Pop | , ("prev_log", [t| JSValue |], [| id |]) |
145 | ebf38064 | Iustin Pop | , ("tmout", [t| Int |], [| id |]) |
146 | ebf38064 | Iustin Pop | ]) |
147 | fae980e5 | Iustin Pop | , (luxiReqArchiveJob, |
148 | 76b62028 | Iustin Pop | [ ("job", [t| Int |], [| id |]) ] |
149 | ebf38064 | Iustin Pop | ) |
150 | fae980e5 | Iustin Pop | , (luxiReqAutoArchiveJobs, |
151 | ebf38064 | Iustin Pop | [ ("age", [t| Int |], [| id |]) |
152 | ebf38064 | Iustin Pop | , ("tmout", [t| Int |], [| id |]) |
153 | ebf38064 | Iustin Pop | ]) |
154 | fae980e5 | Iustin Pop | , (luxiReqCancelJob, |
155 | 76b62028 | Iustin Pop | [ ("job", [t| Int |], [| id |]) ] |
156 | ebf38064 | Iustin Pop | ) |
157 | fae980e5 | Iustin Pop | , (luxiReqSetDrainFlag, |
158 | ebf38064 | Iustin Pop | [ ("flag", [t| Bool |], [| id |]) ] |
159 | ebf38064 | Iustin Pop | ) |
160 | fae980e5 | Iustin Pop | , (luxiReqSetWatcherPause, |
161 | ebf38064 | Iustin Pop | [ ("duration", [t| Double |], [| id |]) ] |
162 | ebf38064 | Iustin Pop | ) |
163 | a0090487 | Agata Murawska | ]) |
164 | 6583e677 | Iustin Pop | |
165 | 95d0d502 | Iustin Pop | $(makeJSONInstance ''LuxiReq) |
166 | 95d0d502 | Iustin Pop | |
167 | 6583e677 | Iustin Pop | -- | The serialisation of LuxiOps into strings in messages. |
168 | a0090487 | Agata Murawska | $(genStrOfOp ''LuxiOp "strOfOp") |
169 | 6583e677 | Iustin Pop | |
170 | 260d0bda | Agata Murawska | $(declareIADT "ResultStatus" |
171 | ebf38064 | Iustin Pop | [ ("RSNormal", 'rsNormal) |
172 | ebf38064 | Iustin Pop | , ("RSUnknown", 'rsUnknown) |
173 | ebf38064 | Iustin Pop | , ("RSNoData", 'rsNodata) |
174 | ebf38064 | Iustin Pop | , ("RSUnavailable", 'rsUnavail) |
175 | ebf38064 | Iustin Pop | , ("RSOffline", 'rsOffline) |
176 | ebf38064 | Iustin Pop | ]) |
177 | 5f828ce4 | Agata Murawska | |
178 | 5f828ce4 | Agata Murawska | $(makeJSONInstance ''ResultStatus) |
179 | 260d0bda | Agata Murawska | |
180 | cdd495ae | Iustin Pop | -- | Type holding the initial (unparsed) Luxi call. |
181 | cdd495ae | Iustin Pop | data LuxiCall = LuxiCall LuxiReq JSValue |
182 | cdd495ae | Iustin Pop | |
183 | 260d0bda | Agata Murawska | -- | Check that ResultStatus is success or fail with descriptive message. |
184 | 260d0bda | Agata Murawska | checkRS :: (Monad m) => ResultStatus -> a -> m a |
185 | 260d0bda | Agata Murawska | checkRS RSNormal val = return val |
186 | 260d0bda | Agata Murawska | checkRS RSUnknown _ = fail "Unknown field" |
187 | 260d0bda | Agata Murawska | checkRS RSNoData _ = fail "No data for a field" |
188 | 260d0bda | Agata Murawska | checkRS RSUnavailable _ = fail "Ganeti reports unavailable data" |
189 | 260d0bda | Agata Murawska | checkRS RSOffline _ = fail "Ganeti reports resource as offline" |
190 | 260d0bda | Agata Murawska | |
191 | 6583e677 | Iustin Pop | -- | The end-of-message separator. |
192 | e821050d | Iustin Pop | eOM :: Word8 |
193 | e821050d | Iustin Pop | eOM = 3 |
194 | e821050d | Iustin Pop | |
195 | e821050d | Iustin Pop | -- | The end-of-message encoded as a ByteString. |
196 | e821050d | Iustin Pop | bEOM :: B.ByteString |
197 | e821050d | Iustin Pop | bEOM = B.singleton eOM |
198 | 6583e677 | Iustin Pop | |
199 | 6583e677 | Iustin Pop | -- | Valid keys in the requests and responses. |
200 | 6583e677 | Iustin Pop | data MsgKeys = Method |
201 | 6583e677 | Iustin Pop | | Args |
202 | 6583e677 | Iustin Pop | | Success |
203 | 6583e677 | Iustin Pop | | Result |
204 | 6583e677 | Iustin Pop | |
205 | 6583e677 | Iustin Pop | -- | The serialisation of MsgKeys into strings in messages. |
206 | a0090487 | Agata Murawska | $(genStrOfKey ''MsgKeys "strOfKey") |
207 | 6583e677 | Iustin Pop | |
208 | 6583e677 | Iustin Pop | -- | Luxi client encapsulation. |
209 | e821050d | Iustin Pop | data Client = Client { socket :: Handle -- ^ The socket of the client |
210 | e821050d | Iustin Pop | , rbuf :: IORef B.ByteString -- ^ Already received buffer |
211 | 6583e677 | Iustin Pop | } |
212 | 6583e677 | Iustin Pop | |
213 | 6583e677 | Iustin Pop | -- | Connects to the master daemon and returns a luxi Client. |
214 | 6583e677 | Iustin Pop | getClient :: String -> IO Client |
215 | 6583e677 | Iustin Pop | getClient path = do |
216 | ebf38064 | Iustin Pop | s <- S.socket S.AF_UNIX S.Stream S.defaultProtocol |
217 | ebf38064 | Iustin Pop | withTimeout connTimeout "creating luxi connection" $ |
218 | ebf38064 | Iustin Pop | S.connect s (S.SockAddrUnix path) |
219 | e821050d | Iustin Pop | rf <- newIORef B.empty |
220 | e821050d | Iustin Pop | h <- S.socketToHandle s ReadWriteMode |
221 | e821050d | Iustin Pop | return Client { socket=h, rbuf=rf } |
222 | 6583e677 | Iustin Pop | |
223 | 13f2321c | Iustin Pop | -- | Creates and returns a server endpoint. |
224 | 13f2321c | Iustin Pop | getServer :: FilePath -> IO S.Socket |
225 | 13f2321c | Iustin Pop | getServer path = do |
226 | 13f2321c | Iustin Pop | s <- S.socket S.AF_UNIX S.Stream S.defaultProtocol |
227 | 13f2321c | Iustin Pop | S.bindSocket s (S.SockAddrUnix path) |
228 | 13f2321c | Iustin Pop | S.listen s 5 -- 5 is the max backlog |
229 | 13f2321c | Iustin Pop | return s |
230 | 13f2321c | Iustin Pop | |
231 | 13f2321c | Iustin Pop | -- | Accepts a client |
232 | 13f2321c | Iustin Pop | acceptClient :: S.Socket -> IO Client |
233 | 13f2321c | Iustin Pop | acceptClient s = do |
234 | 13f2321c | Iustin Pop | -- second return is the address of the client, which we ignore here |
235 | 13f2321c | Iustin Pop | (client_socket, _) <- S.accept s |
236 | 13f2321c | Iustin Pop | new_buffer <- newIORef B.empty |
237 | 13f2321c | Iustin Pop | handle <- S.socketToHandle client_socket ReadWriteMode |
238 | 13f2321c | Iustin Pop | return Client { socket=handle, rbuf=new_buffer } |
239 | 13f2321c | Iustin Pop | |
240 | 6583e677 | Iustin Pop | -- | Closes the client socket. |
241 | 6583e677 | Iustin Pop | closeClient :: Client -> IO () |
242 | e821050d | Iustin Pop | closeClient = hClose . socket |
243 | 6583e677 | Iustin Pop | |
244 | 6583e677 | Iustin Pop | -- | Sends a message over a luxi transport. |
245 | 6583e677 | Iustin Pop | sendMsg :: Client -> String -> IO () |
246 | e821050d | Iustin Pop | sendMsg s buf = withTimeout queryTimeout "sending luxi message" $ do |
247 | e821050d | Iustin Pop | let encoded = UTF8.fromString buf |
248 | e821050d | Iustin Pop | handle = socket s |
249 | e821050d | Iustin Pop | B.hPut handle encoded |
250 | e821050d | Iustin Pop | B.hPut handle bEOM |
251 | e821050d | Iustin Pop | hFlush handle |
252 | e821050d | Iustin Pop | |
253 | e821050d | Iustin Pop | -- | Given a current buffer and the handle, it will read from the |
254 | e821050d | Iustin Pop | -- network until we get a full message, and it will return that |
255 | e821050d | Iustin Pop | -- message and the leftover buffer contents. |
256 | e821050d | Iustin Pop | recvUpdate :: Handle -> B.ByteString -> IO (B.ByteString, B.ByteString) |
257 | e821050d | Iustin Pop | recvUpdate handle obuf = do |
258 | e821050d | Iustin Pop | nbuf <- withTimeout queryTimeout "reading luxi response" $ do |
259 | e821050d | Iustin Pop | _ <- hWaitForInput handle (-1) |
260 | e821050d | Iustin Pop | B.hGetNonBlocking handle 4096 |
261 | e821050d | Iustin Pop | let (msg, remaining) = B.break (eOM ==) nbuf |
262 | e821050d | Iustin Pop | newbuf = B.append obuf msg |
263 | e821050d | Iustin Pop | if B.null remaining |
264 | e821050d | Iustin Pop | then recvUpdate handle newbuf |
265 | e821050d | Iustin Pop | else return (newbuf, B.tail remaining) |
266 | 6583e677 | Iustin Pop | |
267 | 6583e677 | Iustin Pop | -- | Waits for a message over a luxi transport. |
268 | 6583e677 | Iustin Pop | recvMsg :: Client -> IO String |
269 | 6583e677 | Iustin Pop | recvMsg s = do |
270 | 6583e677 | Iustin Pop | cbuf <- readIORef $ rbuf s |
271 | e821050d | Iustin Pop | let (imsg, ibuf) = B.break (eOM ==) cbuf |
272 | 95f490de | Iustin Pop | (msg, nbuf) <- |
273 | e821050d | Iustin Pop | if B.null ibuf -- if old buffer didn't contain a full message |
274 | e821050d | Iustin Pop | then recvUpdate (socket s) cbuf -- then we read from network |
275 | e821050d | Iustin Pop | else return (imsg, B.tail ibuf) -- else we return data from our buffer |
276 | 6583e677 | Iustin Pop | writeIORef (rbuf s) nbuf |
277 | e821050d | Iustin Pop | return $ UTF8.toString msg |
278 | 6583e677 | Iustin Pop | |
279 | 6583e677 | Iustin Pop | -- | Serialize a request to String. |
280 | 6583e677 | Iustin Pop | buildCall :: LuxiOp -- ^ The method |
281 | 6583e677 | Iustin Pop | -> String -- ^ The serialized form |
282 | 683b1ca7 | Iustin Pop | buildCall lo = |
283 | ebf38064 | Iustin Pop | let ja = [ (strOfKey Method, JSString $ toJSString $ strOfOp lo::JSValue) |
284 | ebf38064 | Iustin Pop | , (strOfKey Args, opToArgs lo::JSValue) |
285 | ebf38064 | Iustin Pop | ] |
286 | ebf38064 | Iustin Pop | jo = toJSObject ja |
287 | ebf38064 | Iustin Pop | in encodeStrict jo |
288 | 6583e677 | Iustin Pop | |
289 | cdd495ae | Iustin Pop | -- | Check that luxi request contains the required keys and parse it. |
290 | cdd495ae | Iustin Pop | validateCall :: String -> Result LuxiCall |
291 | cdd495ae | Iustin Pop | validateCall s = do |
292 | cdd495ae | Iustin Pop | arr <- fromJResult "luxi call" $ decodeStrict s::Result (JSObject JSValue) |
293 | cdd495ae | Iustin Pop | let aobj = fromJSObject arr |
294 | cdd495ae | Iustin Pop | call <- fromObj aobj (strOfKey Method)::Result LuxiReq |
295 | cdd495ae | Iustin Pop | args <- fromObj aobj (strOfKey Args) |
296 | cdd495ae | Iustin Pop | return (LuxiCall call args) |
297 | cdd495ae | Iustin Pop | |
298 | cdd495ae | Iustin Pop | -- | Converts Luxi call arguments into a 'LuxiOp' data structure. |
299 | cdd495ae | Iustin Pop | -- |
300 | cdd495ae | Iustin Pop | -- This is currently hand-coded until we make it more uniform so that |
301 | cdd495ae | Iustin Pop | -- it can be generated using TH. |
302 | cdd495ae | Iustin Pop | decodeCall :: LuxiCall -> Result LuxiOp |
303 | cdd495ae | Iustin Pop | decodeCall (LuxiCall call args) = |
304 | cdd495ae | Iustin Pop | case call of |
305 | cdd495ae | Iustin Pop | ReqQueryJobs -> do |
306 | cdd495ae | Iustin Pop | (jid, jargs) <- fromJVal args |
307 | 76b62028 | Iustin Pop | rid <- mapM parseJobId jid |
308 | cdd495ae | Iustin Pop | let rargs = map fromJSString jargs |
309 | cdd495ae | Iustin Pop | return $ QueryJobs rid rargs |
310 | cdd495ae | Iustin Pop | ReqQueryInstances -> do |
311 | cdd495ae | Iustin Pop | (names, fields, locking) <- fromJVal args |
312 | cdd495ae | Iustin Pop | return $ QueryInstances names fields locking |
313 | cdd495ae | Iustin Pop | ReqQueryNodes -> do |
314 | cdd495ae | Iustin Pop | (names, fields, locking) <- fromJVal args |
315 | cdd495ae | Iustin Pop | return $ QueryNodes names fields locking |
316 | cdd495ae | Iustin Pop | ReqQueryGroups -> do |
317 | cdd495ae | Iustin Pop | (names, fields, locking) <- fromJVal args |
318 | cdd495ae | Iustin Pop | return $ QueryGroups names fields locking |
319 | cdd495ae | Iustin Pop | ReqQueryClusterInfo -> do |
320 | cdd495ae | Iustin Pop | return QueryClusterInfo |
321 | cdd495ae | Iustin Pop | ReqQuery -> do |
322 | cdd495ae | Iustin Pop | (what, fields, _) <- |
323 | cdd495ae | Iustin Pop | fromJVal args::Result (QrViaLuxi, [String], JSValue) |
324 | cdd495ae | Iustin Pop | return $ Query what fields () |
325 | cdd495ae | Iustin Pop | ReqSubmitJob -> do |
326 | cdd495ae | Iustin Pop | [ops1] <- fromJVal args |
327 | cdd495ae | Iustin Pop | ops2 <- mapM (fromJResult (luxiReqToRaw call) . J.readJSON) ops1 |
328 | cdd495ae | Iustin Pop | return $ SubmitJob ops2 |
329 | cdd495ae | Iustin Pop | ReqSubmitManyJobs -> do |
330 | cdd495ae | Iustin Pop | [ops1] <- fromJVal args |
331 | cdd495ae | Iustin Pop | ops2 <- mapM (fromJResult (luxiReqToRaw call) . J.readJSON) ops1 |
332 | cdd495ae | Iustin Pop | return $ SubmitManyJobs ops2 |
333 | cdd495ae | Iustin Pop | ReqWaitForJobChange -> do |
334 | cdd495ae | Iustin Pop | (jid, fields, pinfo, pidx, wtmout) <- |
335 | cdd495ae | Iustin Pop | -- No instance for 5-tuple, code copied from the |
336 | cdd495ae | Iustin Pop | -- json sources and adapted |
337 | cdd495ae | Iustin Pop | fromJResult "Parsing WaitForJobChange message" $ |
338 | cdd495ae | Iustin Pop | case args of |
339 | cdd495ae | Iustin Pop | JSArray [a, b, c, d, e] -> |
340 | cdd495ae | Iustin Pop | (,,,,) `fmap` |
341 | cdd495ae | Iustin Pop | J.readJSON a `ap` |
342 | cdd495ae | Iustin Pop | J.readJSON b `ap` |
343 | cdd495ae | Iustin Pop | J.readJSON c `ap` |
344 | cdd495ae | Iustin Pop | J.readJSON d `ap` |
345 | cdd495ae | Iustin Pop | J.readJSON e |
346 | cdd495ae | Iustin Pop | _ -> J.Error "Not enough values" |
347 | 76b62028 | Iustin Pop | rid <- parseJobId jid |
348 | cdd495ae | Iustin Pop | return $ WaitForJobChange rid fields pinfo pidx wtmout |
349 | cdd495ae | Iustin Pop | ReqArchiveJob -> do |
350 | cdd495ae | Iustin Pop | [jid] <- fromJVal args |
351 | 76b62028 | Iustin Pop | rid <- parseJobId jid |
352 | cdd495ae | Iustin Pop | return $ ArchiveJob rid |
353 | cdd495ae | Iustin Pop | ReqAutoArchiveJobs -> do |
354 | cdd495ae | Iustin Pop | (age, tmout) <- fromJVal args |
355 | cdd495ae | Iustin Pop | return $ AutoArchiveJobs age tmout |
356 | cdd495ae | Iustin Pop | ReqQueryExports -> do |
357 | cdd495ae | Iustin Pop | (nodes, lock) <- fromJVal args |
358 | cdd495ae | Iustin Pop | return $ QueryExports nodes lock |
359 | cdd495ae | Iustin Pop | ReqQueryConfigValues -> do |
360 | cdd495ae | Iustin Pop | [fields] <- fromJVal args |
361 | cdd495ae | Iustin Pop | return $ QueryConfigValues fields |
362 | cdd495ae | Iustin Pop | ReqQueryTags -> do |
363 | cdd495ae | Iustin Pop | (kind, name) <- fromJVal args |
364 | cdd495ae | Iustin Pop | return $ QueryTags kind name |
365 | cdd495ae | Iustin Pop | ReqCancelJob -> do |
366 | cdd495ae | Iustin Pop | [job] <- fromJVal args |
367 | 76b62028 | Iustin Pop | rid <- parseJobId job |
368 | cdd495ae | Iustin Pop | return $ CancelJob rid |
369 | cdd495ae | Iustin Pop | ReqSetDrainFlag -> do |
370 | cdd495ae | Iustin Pop | [flag] <- fromJVal args |
371 | cdd495ae | Iustin Pop | return $ SetDrainFlag flag |
372 | cdd495ae | Iustin Pop | ReqSetWatcherPause -> do |
373 | cdd495ae | Iustin Pop | [duration] <- fromJVal args |
374 | cdd495ae | Iustin Pop | return $ SetWatcherPause duration |
375 | cdd495ae | Iustin Pop | |
376 | 6583e677 | Iustin Pop | -- | Check that luxi responses contain the required keys and that the |
377 | 6583e677 | Iustin Pop | -- call was successful. |
378 | 6583e677 | Iustin Pop | validateResult :: String -> Result JSValue |
379 | 6583e677 | Iustin Pop | validateResult s = do |
380 | e821050d | Iustin Pop | when (UTF8.replacement_char `elem` s) $ |
381 | e821050d | Iustin Pop | fail "Failed to decode UTF-8, detected replacement char after decoding" |
382 | c96d44df | Iustin Pop | oarr <- fromJResult "Parsing LUXI response" |
383 | c96d44df | Iustin Pop | (decodeStrict s)::Result (JSObject JSValue) |
384 | 262f3e6c | Iustin Pop | let arr = J.fromJSObject oarr |
385 | e8230242 | Iustin Pop | status <- fromObj arr (strOfKey Success)::Result Bool |
386 | 6583e677 | Iustin Pop | let rkey = strOfKey Result |
387 | 3603605a | Iustin Pop | if status |
388 | 3603605a | Iustin Pop | then fromObj arr rkey |
389 | 3603605a | Iustin Pop | else fromObj arr rkey >>= fail |
390 | 6583e677 | Iustin Pop | |
391 | 6583e677 | Iustin Pop | -- | Generic luxi method call. |
392 | 683b1ca7 | Iustin Pop | callMethod :: LuxiOp -> Client -> IO (Result JSValue) |
393 | 683b1ca7 | Iustin Pop | callMethod method s = do |
394 | 683b1ca7 | Iustin Pop | sendMsg s $ buildCall method |
395 | 6583e677 | Iustin Pop | result <- recvMsg s |
396 | 6583e677 | Iustin Pop | let rval = validateResult result |
397 | 6583e677 | Iustin Pop | return rval |
398 | 9a2ff880 | Iustin Pop | |
399 | 619e89c8 | Iustin Pop | -- | Parses a job ID. |
400 | 619e89c8 | Iustin Pop | parseJobId :: JSValue -> Result JobId |
401 | 76b62028 | Iustin Pop | parseJobId (JSString x) = tryRead "parsing job id" . fromJSString $ x |
402 | 76b62028 | Iustin Pop | parseJobId (JSRational _ x) = |
403 | 76b62028 | Iustin Pop | if denominator x /= 1 |
404 | 76b62028 | Iustin Pop | then Bad $ "Got fractional job ID from master daemon?! Value:" ++ show x |
405 | 76b62028 | Iustin Pop | -- FIXME: potential integer overflow here on 32-bit platforms |
406 | 76b62028 | Iustin Pop | else Ok . fromIntegral . numerator $ x |
407 | 619e89c8 | Iustin Pop | parseJobId x = Bad $ "Wrong type/value for job id: " ++ show x |
408 | 619e89c8 | Iustin Pop | |
409 | 619e89c8 | Iustin Pop | -- | Parse job submission result. |
410 | 619e89c8 | Iustin Pop | parseSubmitJobResult :: JSValue -> Result JobId |
411 | 619e89c8 | Iustin Pop | parseSubmitJobResult (JSArray [JSBool True, v]) = parseJobId v |
412 | 619e89c8 | Iustin Pop | parseSubmitJobResult (JSArray [JSBool False, JSString x]) = |
413 | 619e89c8 | Iustin Pop | Bad (fromJSString x) |
414 | 619e89c8 | Iustin Pop | parseSubmitJobResult v = Bad $ "Unknown result from the master daemon" ++ |
415 | 619e89c8 | Iustin Pop | show v |
416 | 619e89c8 | Iustin Pop | |
417 | 9a2ff880 | Iustin Pop | -- | Specialized submitManyJobs call. |
418 | ccc817a2 | Iustin Pop | submitManyJobs :: Client -> [[OpCode]] -> IO (Result [JobId]) |
419 | 9a2ff880 | Iustin Pop | submitManyJobs s jobs = do |
420 | 683b1ca7 | Iustin Pop | rval <- callMethod (SubmitManyJobs jobs) s |
421 | 9a2ff880 | Iustin Pop | -- map each result (status, payload) pair into a nice Result ADT |
422 | 9a2ff880 | Iustin Pop | return $ case rval of |
423 | 9a2ff880 | Iustin Pop | Bad x -> Bad x |
424 | 619e89c8 | Iustin Pop | Ok (JSArray r) -> mapM parseSubmitJobResult r |
425 | 9a2ff880 | Iustin Pop | x -> Bad ("Cannot parse response from Ganeti: " ++ show x) |
426 | 9a2ff880 | Iustin Pop | |
427 | 9a2ff880 | Iustin Pop | -- | Custom queryJobs call. |
428 | ccc817a2 | Iustin Pop | queryJobsStatus :: Client -> [JobId] -> IO (Result [JobStatus]) |
429 | 9a2ff880 | Iustin Pop | queryJobsStatus s jids = do |
430 | 76b62028 | Iustin Pop | rval <- callMethod (QueryJobs jids ["status"]) s |
431 | 9a2ff880 | Iustin Pop | return $ case rval of |
432 | 9a2ff880 | Iustin Pop | Bad x -> Bad x |
433 | 9a2ff880 | Iustin Pop | Ok y -> case J.readJSON y::(J.Result [[JobStatus]]) of |
434 | 9a2ff880 | Iustin Pop | J.Ok vals -> if any null vals |
435 | 9a2ff880 | Iustin Pop | then Bad "Missing job status field" |
436 | 9a2ff880 | Iustin Pop | else Ok (map head vals) |
437 | 9a2ff880 | Iustin Pop | J.Error x -> Bad x |