root / htools / Ganeti / Luxi.hs @ 9d4cc8ed
History | View | Annotate | Download (14.5 kB)
1 | a0090487 | Agata Murawska | {-# LANGUAGE TemplateHaskell #-} |
---|---|---|---|
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 | 95d0d502 | Iustin Pop | , LuxiReq(..) |
31 | ebf38064 | Iustin Pop | , Client |
32 | ccc817a2 | Iustin Pop | , JobId |
33 | 0aff2293 | Iustin Pop | , RecvResult(..) |
34 | be747966 | Iustin Pop | , TagObject(..) |
35 | 0aff2293 | Iustin Pop | , strOfOp |
36 | ebf38064 | Iustin Pop | , getClient |
37 | 13f2321c | Iustin Pop | , getServer |
38 | 13f2321c | Iustin Pop | , acceptClient |
39 | ebf38064 | Iustin Pop | , closeClient |
40 | 0aff2293 | Iustin Pop | , closeServer |
41 | ebf38064 | Iustin Pop | , callMethod |
42 | ebf38064 | Iustin Pop | , submitManyJobs |
43 | ebf38064 | Iustin Pop | , queryJobsStatus |
44 | cdd495ae | Iustin Pop | , buildCall |
45 | 0aff2293 | Iustin Pop | , buildResponse |
46 | cdd495ae | Iustin Pop | , validateCall |
47 | cdd495ae | Iustin Pop | , decodeCall |
48 | 13f2321c | Iustin Pop | , recvMsg |
49 | 0aff2293 | Iustin Pop | , recvMsgExt |
50 | 13f2321c | Iustin Pop | , sendMsg |
51 | ebf38064 | Iustin Pop | ) where |
52 | 6583e677 | Iustin Pop | |
53 | 0aff2293 | Iustin Pop | import Control.Exception (catch) |
54 | 6583e677 | Iustin Pop | import Data.IORef |
55 | 76b62028 | Iustin Pop | import Data.Ratio (numerator, denominator) |
56 | e821050d | Iustin Pop | import qualified Data.ByteString as B |
57 | e821050d | Iustin Pop | import qualified Data.ByteString.UTF8 as UTF8 |
58 | e821050d | Iustin Pop | import Data.Word (Word8) |
59 | 6583e677 | Iustin Pop | import Control.Monad |
60 | 0aff2293 | Iustin Pop | import Prelude hiding (catch) |
61 | 0903280b | Iustin Pop | import Text.JSON (encodeStrict, decodeStrict) |
62 | 6583e677 | Iustin Pop | import qualified Text.JSON as J |
63 | 6583e677 | Iustin Pop | import Text.JSON.Types |
64 | 0aff2293 | Iustin Pop | import System.Directory (removeFile) |
65 | e821050d | Iustin Pop | import System.IO (hClose, hFlush, hWaitForInput, Handle, IOMode(..)) |
66 | 0aff2293 | Iustin Pop | import System.IO.Error (isEOFError) |
67 | 6583e677 | Iustin Pop | import System.Timeout |
68 | 6583e677 | Iustin Pop | import qualified Network.Socket as S |
69 | 6583e677 | Iustin Pop | |
70 | b69be409 | Iustin Pop | import Ganeti.HTools.JSON |
71 | 6583e677 | Iustin Pop | import Ganeti.HTools.Types |
72 | cdd495ae | Iustin Pop | import Ganeti.HTools.Utils |
73 | 6583e677 | Iustin Pop | |
74 | 92678b3c | Iustin Pop | import Ganeti.Constants |
75 | 9a2ff880 | Iustin Pop | import Ganeti.Jobs (JobStatus) |
76 | 683b1ca7 | Iustin Pop | import Ganeti.OpCodes (OpCode) |
77 | dc6a0f82 | Iustin Pop | import qualified Ganeti.Qlang as Qlang |
78 | a0090487 | Agata Murawska | import Ganeti.THH |
79 | 9a2ff880 | Iustin Pop | |
80 | 6583e677 | Iustin Pop | -- * Utility functions |
81 | 6583e677 | Iustin Pop | |
82 | 6583e677 | Iustin Pop | -- | Wrapper over System.Timeout.timeout that fails in the IO monad. |
83 | 6583e677 | Iustin Pop | withTimeout :: Int -> String -> IO a -> IO a |
84 | 6583e677 | Iustin Pop | withTimeout secs descr action = do |
85 | ebf38064 | Iustin Pop | result <- timeout (secs * 1000000) action |
86 | 3603605a | Iustin Pop | case result of |
87 | 3603605a | Iustin Pop | Nothing -> fail $ "Timeout in " ++ descr |
88 | 3603605a | Iustin Pop | Just v -> return v |
89 | 6583e677 | Iustin Pop | |
90 | 6583e677 | Iustin Pop | -- * Generic protocol functionality |
91 | 6583e677 | Iustin Pop | |
92 | 0aff2293 | Iustin Pop | -- | Result of receiving a message from the socket. |
93 | 0aff2293 | Iustin Pop | data RecvResult = RecvConnClosed -- ^ Connection closed |
94 | 0aff2293 | Iustin Pop | | RecvError String -- ^ Any other error |
95 | 0aff2293 | Iustin Pop | | RecvOk String -- ^ Successfull receive |
96 | 0aff2293 | Iustin Pop | deriving (Show, Read, Eq) |
97 | 0aff2293 | Iustin Pop | |
98 | ccc817a2 | Iustin Pop | -- | The Ganeti job type. |
99 | 76b62028 | Iustin Pop | type JobId = Int |
100 | ccc817a2 | Iustin Pop | |
101 | be747966 | Iustin Pop | -- | Data type representing what items do the tag operations apply to. |
102 | be747966 | Iustin Pop | $(declareSADT "TagObject" |
103 | be747966 | Iustin Pop | [ ("TagInstance", 'tagInstance) |
104 | be747966 | Iustin Pop | , ("TagNode", 'tagNode) |
105 | be747966 | Iustin Pop | , ("TagGroup", 'tagNodegroup) |
106 | be747966 | Iustin Pop | , ("TagCluster", 'tagCluster) |
107 | be747966 | Iustin Pop | ]) |
108 | be747966 | Iustin Pop | $(makeJSONInstance ''TagObject) |
109 | be747966 | Iustin Pop | |
110 | a0090487 | Agata Murawska | -- | Currently supported Luxi operations and JSON serialization. |
111 | a0090487 | Agata Murawska | $(genLuxiOp "LuxiOp" |
112 | fae980e5 | Iustin Pop | [(luxiReqQuery, |
113 | 8a9ee1e9 | Iustin Pop | [ ("what", [t| Qlang.ItemType |]) |
114 | 4b71f30c | Iustin Pop | , ("fields", [t| [String] |]) |
115 | 4b71f30c | Iustin Pop | , ("qfilter", [t| Qlang.Filter |]) |
116 | ebf38064 | Iustin Pop | ]) |
117 | fae980e5 | Iustin Pop | , (luxiReqQueryNodes, |
118 | 4b71f30c | Iustin Pop | [ ("names", [t| [String] |]) |
119 | 4b71f30c | Iustin Pop | , ("fields", [t| [String] |]) |
120 | 4b71f30c | Iustin Pop | , ("lock", [t| Bool |]) |
121 | ebf38064 | Iustin Pop | ]) |
122 | fae980e5 | Iustin Pop | , (luxiReqQueryGroups, |
123 | 4b71f30c | Iustin Pop | [ ("names", [t| [String] |]) |
124 | 4b71f30c | Iustin Pop | , ("fields", [t| [String] |]) |
125 | 4b71f30c | Iustin Pop | , ("lock", [t| Bool |]) |
126 | ebf38064 | Iustin Pop | ]) |
127 | fae980e5 | Iustin Pop | , (luxiReqQueryInstances, |
128 | 4b71f30c | Iustin Pop | [ ("names", [t| [String] |]) |
129 | 4b71f30c | Iustin Pop | , ("fields", [t| [String] |]) |
130 | 4b71f30c | Iustin Pop | , ("lock", [t| Bool |]) |
131 | ebf38064 | Iustin Pop | ]) |
132 | fae980e5 | Iustin Pop | , (luxiReqQueryJobs, |
133 | 4b71f30c | Iustin Pop | [ ("ids", [t| [Int] |]) |
134 | 4b71f30c | Iustin Pop | , ("fields", [t| [String] |]) |
135 | ebf38064 | Iustin Pop | ]) |
136 | fae980e5 | Iustin Pop | , (luxiReqQueryExports, |
137 | 4b71f30c | Iustin Pop | [ ("nodes", [t| [String] |]) |
138 | 4b71f30c | Iustin Pop | , ("lock", [t| Bool |]) |
139 | ebf38064 | Iustin Pop | ]) |
140 | fae980e5 | Iustin Pop | , (luxiReqQueryConfigValues, |
141 | 4b71f30c | Iustin Pop | [ ("fields", [t| [String] |]) ] |
142 | ebf38064 | Iustin Pop | ) |
143 | fae980e5 | Iustin Pop | , (luxiReqQueryClusterInfo, []) |
144 | fae980e5 | Iustin Pop | , (luxiReqQueryTags, |
145 | be747966 | Iustin Pop | [ ("kind", [t| TagObject |]) |
146 | 4b71f30c | Iustin Pop | , ("name", [t| String |]) |
147 | ebf38064 | Iustin Pop | ]) |
148 | fae980e5 | Iustin Pop | , (luxiReqSubmitJob, |
149 | 4b71f30c | Iustin Pop | [ ("job", [t| [OpCode] |]) ] |
150 | ebf38064 | Iustin Pop | ) |
151 | fae980e5 | Iustin Pop | , (luxiReqSubmitManyJobs, |
152 | 4b71f30c | Iustin Pop | [ ("ops", [t| [[OpCode]] |]) ] |
153 | ebf38064 | Iustin Pop | ) |
154 | fae980e5 | Iustin Pop | , (luxiReqWaitForJobChange, |
155 | 4b71f30c | Iustin Pop | [ ("job", [t| Int |]) |
156 | 4b71f30c | Iustin Pop | , ("fields", [t| [String]|]) |
157 | 4b71f30c | Iustin Pop | , ("prev_job", [t| JSValue |]) |
158 | 4b71f30c | Iustin Pop | , ("prev_log", [t| JSValue |]) |
159 | 4b71f30c | Iustin Pop | , ("tmout", [t| Int |]) |
160 | ebf38064 | Iustin Pop | ]) |
161 | fae980e5 | Iustin Pop | , (luxiReqArchiveJob, |
162 | 4b71f30c | Iustin Pop | [ ("job", [t| Int |]) ] |
163 | ebf38064 | Iustin Pop | ) |
164 | fae980e5 | Iustin Pop | , (luxiReqAutoArchiveJobs, |
165 | 4b71f30c | Iustin Pop | [ ("age", [t| Int |]) |
166 | 4b71f30c | Iustin Pop | , ("tmout", [t| Int |]) |
167 | ebf38064 | Iustin Pop | ]) |
168 | fae980e5 | Iustin Pop | , (luxiReqCancelJob, |
169 | 4b71f30c | Iustin Pop | [ ("job", [t| Int |]) ] |
170 | ebf38064 | Iustin Pop | ) |
171 | fae980e5 | Iustin Pop | , (luxiReqSetDrainFlag, |
172 | 4b71f30c | Iustin Pop | [ ("flag", [t| Bool |]) ] |
173 | ebf38064 | Iustin Pop | ) |
174 | fae980e5 | Iustin Pop | , (luxiReqSetWatcherPause, |
175 | 4b71f30c | Iustin Pop | [ ("duration", [t| Double |]) ] |
176 | ebf38064 | Iustin Pop | ) |
177 | a0090487 | Agata Murawska | ]) |
178 | 6583e677 | Iustin Pop | |
179 | 95d0d502 | Iustin Pop | $(makeJSONInstance ''LuxiReq) |
180 | 95d0d502 | Iustin Pop | |
181 | 6583e677 | Iustin Pop | -- | The serialisation of LuxiOps into strings in messages. |
182 | a0090487 | Agata Murawska | $(genStrOfOp ''LuxiOp "strOfOp") |
183 | 6583e677 | Iustin Pop | |
184 | cdd495ae | Iustin Pop | -- | Type holding the initial (unparsed) Luxi call. |
185 | cdd495ae | Iustin Pop | data LuxiCall = LuxiCall LuxiReq JSValue |
186 | cdd495ae | Iustin Pop | |
187 | 6583e677 | Iustin Pop | -- | The end-of-message separator. |
188 | e821050d | Iustin Pop | eOM :: Word8 |
189 | e821050d | Iustin Pop | eOM = 3 |
190 | e821050d | Iustin Pop | |
191 | e821050d | Iustin Pop | -- | The end-of-message encoded as a ByteString. |
192 | e821050d | Iustin Pop | bEOM :: B.ByteString |
193 | e821050d | Iustin Pop | bEOM = B.singleton eOM |
194 | 6583e677 | Iustin Pop | |
195 | 6583e677 | Iustin Pop | -- | Valid keys in the requests and responses. |
196 | 6583e677 | Iustin Pop | data MsgKeys = Method |
197 | 6583e677 | Iustin Pop | | Args |
198 | 6583e677 | Iustin Pop | | Success |
199 | 6583e677 | Iustin Pop | | Result |
200 | 6583e677 | Iustin Pop | |
201 | 6583e677 | Iustin Pop | -- | The serialisation of MsgKeys into strings in messages. |
202 | a0090487 | Agata Murawska | $(genStrOfKey ''MsgKeys "strOfKey") |
203 | 6583e677 | Iustin Pop | |
204 | 6583e677 | Iustin Pop | -- | Luxi client encapsulation. |
205 | e821050d | Iustin Pop | data Client = Client { socket :: Handle -- ^ The socket of the client |
206 | e821050d | Iustin Pop | , rbuf :: IORef B.ByteString -- ^ Already received buffer |
207 | 6583e677 | Iustin Pop | } |
208 | 6583e677 | Iustin Pop | |
209 | 6583e677 | Iustin Pop | -- | Connects to the master daemon and returns a luxi Client. |
210 | 6583e677 | Iustin Pop | getClient :: String -> IO Client |
211 | 6583e677 | Iustin Pop | getClient path = do |
212 | ebf38064 | Iustin Pop | s <- S.socket S.AF_UNIX S.Stream S.defaultProtocol |
213 | ebf38064 | Iustin Pop | withTimeout connTimeout "creating luxi connection" $ |
214 | ebf38064 | Iustin Pop | S.connect s (S.SockAddrUnix path) |
215 | e821050d | Iustin Pop | rf <- newIORef B.empty |
216 | e821050d | Iustin Pop | h <- S.socketToHandle s ReadWriteMode |
217 | e821050d | Iustin Pop | return Client { socket=h, rbuf=rf } |
218 | 6583e677 | Iustin Pop | |
219 | 13f2321c | Iustin Pop | -- | Creates and returns a server endpoint. |
220 | 13f2321c | Iustin Pop | getServer :: FilePath -> IO S.Socket |
221 | 13f2321c | Iustin Pop | getServer path = do |
222 | 13f2321c | Iustin Pop | s <- S.socket S.AF_UNIX S.Stream S.defaultProtocol |
223 | 13f2321c | Iustin Pop | S.bindSocket s (S.SockAddrUnix path) |
224 | 13f2321c | Iustin Pop | S.listen s 5 -- 5 is the max backlog |
225 | 13f2321c | Iustin Pop | return s |
226 | 13f2321c | Iustin Pop | |
227 | 0aff2293 | Iustin Pop | -- | Closes a server endpoint. |
228 | 0aff2293 | Iustin Pop | -- FIXME: this should be encapsulated into a nicer type. |
229 | 0aff2293 | Iustin Pop | closeServer :: FilePath -> S.Socket -> IO () |
230 | 0aff2293 | Iustin Pop | closeServer path sock = do |
231 | 0aff2293 | Iustin Pop | S.sClose sock |
232 | 0aff2293 | Iustin Pop | removeFile path |
233 | 0aff2293 | Iustin Pop | |
234 | 13f2321c | Iustin Pop | -- | Accepts a client |
235 | 13f2321c | Iustin Pop | acceptClient :: S.Socket -> IO Client |
236 | 13f2321c | Iustin Pop | acceptClient s = do |
237 | 13f2321c | Iustin Pop | -- second return is the address of the client, which we ignore here |
238 | 13f2321c | Iustin Pop | (client_socket, _) <- S.accept s |
239 | 13f2321c | Iustin Pop | new_buffer <- newIORef B.empty |
240 | 13f2321c | Iustin Pop | handle <- S.socketToHandle client_socket ReadWriteMode |
241 | 13f2321c | Iustin Pop | return Client { socket=handle, rbuf=new_buffer } |
242 | 13f2321c | Iustin Pop | |
243 | 6583e677 | Iustin Pop | -- | Closes the client socket. |
244 | 6583e677 | Iustin Pop | closeClient :: Client -> IO () |
245 | e821050d | Iustin Pop | closeClient = hClose . socket |
246 | 6583e677 | Iustin Pop | |
247 | 6583e677 | Iustin Pop | -- | Sends a message over a luxi transport. |
248 | 6583e677 | Iustin Pop | sendMsg :: Client -> String -> IO () |
249 | e821050d | Iustin Pop | sendMsg s buf = withTimeout queryTimeout "sending luxi message" $ do |
250 | e821050d | Iustin Pop | let encoded = UTF8.fromString buf |
251 | e821050d | Iustin Pop | handle = socket s |
252 | e821050d | Iustin Pop | B.hPut handle encoded |
253 | e821050d | Iustin Pop | B.hPut handle bEOM |
254 | e821050d | Iustin Pop | hFlush handle |
255 | e821050d | Iustin Pop | |
256 | e821050d | Iustin Pop | -- | Given a current buffer and the handle, it will read from the |
257 | e821050d | Iustin Pop | -- network until we get a full message, and it will return that |
258 | e821050d | Iustin Pop | -- message and the leftover buffer contents. |
259 | e821050d | Iustin Pop | recvUpdate :: Handle -> B.ByteString -> IO (B.ByteString, B.ByteString) |
260 | e821050d | Iustin Pop | recvUpdate handle obuf = do |
261 | e821050d | Iustin Pop | nbuf <- withTimeout queryTimeout "reading luxi response" $ do |
262 | e821050d | Iustin Pop | _ <- hWaitForInput handle (-1) |
263 | e821050d | Iustin Pop | B.hGetNonBlocking handle 4096 |
264 | e821050d | Iustin Pop | let (msg, remaining) = B.break (eOM ==) nbuf |
265 | e821050d | Iustin Pop | newbuf = B.append obuf msg |
266 | e821050d | Iustin Pop | if B.null remaining |
267 | e821050d | Iustin Pop | then recvUpdate handle newbuf |
268 | e821050d | Iustin Pop | else return (newbuf, B.tail remaining) |
269 | 6583e677 | Iustin Pop | |
270 | 6583e677 | Iustin Pop | -- | Waits for a message over a luxi transport. |
271 | 6583e677 | Iustin Pop | recvMsg :: Client -> IO String |
272 | 6583e677 | Iustin Pop | recvMsg s = do |
273 | 6583e677 | Iustin Pop | cbuf <- readIORef $ rbuf s |
274 | e821050d | Iustin Pop | let (imsg, ibuf) = B.break (eOM ==) cbuf |
275 | 95f490de | Iustin Pop | (msg, nbuf) <- |
276 | e821050d | Iustin Pop | if B.null ibuf -- if old buffer didn't contain a full message |
277 | e821050d | Iustin Pop | then recvUpdate (socket s) cbuf -- then we read from network |
278 | e821050d | Iustin Pop | else return (imsg, B.tail ibuf) -- else we return data from our buffer |
279 | 6583e677 | Iustin Pop | writeIORef (rbuf s) nbuf |
280 | e821050d | Iustin Pop | return $ UTF8.toString msg |
281 | 6583e677 | Iustin Pop | |
282 | 0aff2293 | Iustin Pop | -- | Extended wrapper over recvMsg. |
283 | 0aff2293 | Iustin Pop | recvMsgExt :: Client -> IO RecvResult |
284 | 0aff2293 | Iustin Pop | recvMsgExt s = |
285 | 0aff2293 | Iustin Pop | catch (liftM RecvOk (recvMsg s)) $ \e -> |
286 | 0aff2293 | Iustin Pop | if isEOFError e |
287 | 0aff2293 | Iustin Pop | then return RecvConnClosed |
288 | 0aff2293 | Iustin Pop | else return $ RecvError (show e) |
289 | 0aff2293 | Iustin Pop | |
290 | 6583e677 | Iustin Pop | -- | Serialize a request to String. |
291 | 6583e677 | Iustin Pop | buildCall :: LuxiOp -- ^ The method |
292 | 6583e677 | Iustin Pop | -> String -- ^ The serialized form |
293 | 683b1ca7 | Iustin Pop | buildCall lo = |
294 | 2cdaf225 | Iustin Pop | let ja = [ (strOfKey Method, J.showJSON $ strOfOp lo) |
295 | 2cdaf225 | Iustin Pop | , (strOfKey Args, opToArgs lo) |
296 | ebf38064 | Iustin Pop | ] |
297 | ebf38064 | Iustin Pop | jo = toJSObject ja |
298 | ebf38064 | Iustin Pop | in encodeStrict jo |
299 | 6583e677 | Iustin Pop | |
300 | 0aff2293 | Iustin Pop | -- | Serialize the response to String. |
301 | 0aff2293 | Iustin Pop | buildResponse :: Bool -- ^ Success |
302 | 0aff2293 | Iustin Pop | -> JSValue -- ^ The arguments |
303 | 0aff2293 | Iustin Pop | -> String -- ^ The serialized form |
304 | 0aff2293 | Iustin Pop | buildResponse success args = |
305 | 0aff2293 | Iustin Pop | let ja = [ (strOfKey Success, JSBool success) |
306 | 0aff2293 | Iustin Pop | , (strOfKey Result, args)] |
307 | 0aff2293 | Iustin Pop | jo = toJSObject ja |
308 | 0aff2293 | Iustin Pop | in encodeStrict jo |
309 | 0aff2293 | Iustin Pop | |
310 | cdd495ae | Iustin Pop | -- | Check that luxi request contains the required keys and parse it. |
311 | cdd495ae | Iustin Pop | validateCall :: String -> Result LuxiCall |
312 | cdd495ae | Iustin Pop | validateCall s = do |
313 | 0aff2293 | Iustin Pop | arr <- fromJResult "parsing top-level luxi message" $ |
314 | 0aff2293 | Iustin Pop | decodeStrict s::Result (JSObject JSValue) |
315 | cdd495ae | Iustin Pop | let aobj = fromJSObject arr |
316 | cdd495ae | Iustin Pop | call <- fromObj aobj (strOfKey Method)::Result LuxiReq |
317 | cdd495ae | Iustin Pop | args <- fromObj aobj (strOfKey Args) |
318 | cdd495ae | Iustin Pop | return (LuxiCall call args) |
319 | cdd495ae | Iustin Pop | |
320 | cdd495ae | Iustin Pop | -- | Converts Luxi call arguments into a 'LuxiOp' data structure. |
321 | cdd495ae | Iustin Pop | -- |
322 | cdd495ae | Iustin Pop | -- This is currently hand-coded until we make it more uniform so that |
323 | cdd495ae | Iustin Pop | -- it can be generated using TH. |
324 | cdd495ae | Iustin Pop | decodeCall :: LuxiCall -> Result LuxiOp |
325 | cdd495ae | Iustin Pop | decodeCall (LuxiCall call args) = |
326 | cdd495ae | Iustin Pop | case call of |
327 | cdd495ae | Iustin Pop | ReqQueryJobs -> do |
328 | cdd495ae | Iustin Pop | (jid, jargs) <- fromJVal args |
329 | 76b62028 | Iustin Pop | rid <- mapM parseJobId jid |
330 | cdd495ae | Iustin Pop | let rargs = map fromJSString jargs |
331 | cdd495ae | Iustin Pop | return $ QueryJobs rid rargs |
332 | cdd495ae | Iustin Pop | ReqQueryInstances -> do |
333 | cdd495ae | Iustin Pop | (names, fields, locking) <- fromJVal args |
334 | cdd495ae | Iustin Pop | return $ QueryInstances names fields locking |
335 | cdd495ae | Iustin Pop | ReqQueryNodes -> do |
336 | cdd495ae | Iustin Pop | (names, fields, locking) <- fromJVal args |
337 | cdd495ae | Iustin Pop | return $ QueryNodes names fields locking |
338 | cdd495ae | Iustin Pop | ReqQueryGroups -> do |
339 | cdd495ae | Iustin Pop | (names, fields, locking) <- fromJVal args |
340 | cdd495ae | Iustin Pop | return $ QueryGroups names fields locking |
341 | cdd495ae | Iustin Pop | ReqQueryClusterInfo -> do |
342 | cdd495ae | Iustin Pop | return QueryClusterInfo |
343 | cdd495ae | Iustin Pop | ReqQuery -> do |
344 | 9a94c848 | Iustin Pop | (what, fields, qfilter) <- fromJVal args |
345 | 9a94c848 | Iustin Pop | return $ Query what fields qfilter |
346 | cdd495ae | Iustin Pop | ReqSubmitJob -> do |
347 | cdd495ae | Iustin Pop | [ops1] <- fromJVal args |
348 | cdd495ae | Iustin Pop | ops2 <- mapM (fromJResult (luxiReqToRaw call) . J.readJSON) ops1 |
349 | cdd495ae | Iustin Pop | return $ SubmitJob ops2 |
350 | cdd495ae | Iustin Pop | ReqSubmitManyJobs -> do |
351 | cdd495ae | Iustin Pop | [ops1] <- fromJVal args |
352 | cdd495ae | Iustin Pop | ops2 <- mapM (fromJResult (luxiReqToRaw call) . J.readJSON) ops1 |
353 | cdd495ae | Iustin Pop | return $ SubmitManyJobs ops2 |
354 | cdd495ae | Iustin Pop | ReqWaitForJobChange -> do |
355 | cdd495ae | Iustin Pop | (jid, fields, pinfo, pidx, wtmout) <- |
356 | cdd495ae | Iustin Pop | -- No instance for 5-tuple, code copied from the |
357 | cdd495ae | Iustin Pop | -- json sources and adapted |
358 | cdd495ae | Iustin Pop | fromJResult "Parsing WaitForJobChange message" $ |
359 | cdd495ae | Iustin Pop | case args of |
360 | cdd495ae | Iustin Pop | JSArray [a, b, c, d, e] -> |
361 | cdd495ae | Iustin Pop | (,,,,) `fmap` |
362 | cdd495ae | Iustin Pop | J.readJSON a `ap` |
363 | cdd495ae | Iustin Pop | J.readJSON b `ap` |
364 | cdd495ae | Iustin Pop | J.readJSON c `ap` |
365 | cdd495ae | Iustin Pop | J.readJSON d `ap` |
366 | cdd495ae | Iustin Pop | J.readJSON e |
367 | cdd495ae | Iustin Pop | _ -> J.Error "Not enough values" |
368 | 76b62028 | Iustin Pop | rid <- parseJobId jid |
369 | cdd495ae | Iustin Pop | return $ WaitForJobChange rid fields pinfo pidx wtmout |
370 | cdd495ae | Iustin Pop | ReqArchiveJob -> do |
371 | cdd495ae | Iustin Pop | [jid] <- fromJVal args |
372 | 76b62028 | Iustin Pop | rid <- parseJobId jid |
373 | cdd495ae | Iustin Pop | return $ ArchiveJob rid |
374 | cdd495ae | Iustin Pop | ReqAutoArchiveJobs -> do |
375 | cdd495ae | Iustin Pop | (age, tmout) <- fromJVal args |
376 | cdd495ae | Iustin Pop | return $ AutoArchiveJobs age tmout |
377 | cdd495ae | Iustin Pop | ReqQueryExports -> do |
378 | cdd495ae | Iustin Pop | (nodes, lock) <- fromJVal args |
379 | cdd495ae | Iustin Pop | return $ QueryExports nodes lock |
380 | cdd495ae | Iustin Pop | ReqQueryConfigValues -> do |
381 | cdd495ae | Iustin Pop | [fields] <- fromJVal args |
382 | cdd495ae | Iustin Pop | return $ QueryConfigValues fields |
383 | cdd495ae | Iustin Pop | ReqQueryTags -> do |
384 | cdd495ae | Iustin Pop | (kind, name) <- fromJVal args |
385 | cdd495ae | Iustin Pop | return $ QueryTags kind name |
386 | cdd495ae | Iustin Pop | ReqCancelJob -> do |
387 | cdd495ae | Iustin Pop | [job] <- fromJVal args |
388 | 76b62028 | Iustin Pop | rid <- parseJobId job |
389 | cdd495ae | Iustin Pop | return $ CancelJob rid |
390 | cdd495ae | Iustin Pop | ReqSetDrainFlag -> do |
391 | cdd495ae | Iustin Pop | [flag] <- fromJVal args |
392 | cdd495ae | Iustin Pop | return $ SetDrainFlag flag |
393 | cdd495ae | Iustin Pop | ReqSetWatcherPause -> do |
394 | cdd495ae | Iustin Pop | [duration] <- fromJVal args |
395 | cdd495ae | Iustin Pop | return $ SetWatcherPause duration |
396 | cdd495ae | Iustin Pop | |
397 | 6583e677 | Iustin Pop | -- | Check that luxi responses contain the required keys and that the |
398 | 6583e677 | Iustin Pop | -- call was successful. |
399 | 6583e677 | Iustin Pop | validateResult :: String -> Result JSValue |
400 | 6583e677 | Iustin Pop | validateResult s = do |
401 | e821050d | Iustin Pop | when (UTF8.replacement_char `elem` s) $ |
402 | e821050d | Iustin Pop | fail "Failed to decode UTF-8, detected replacement char after decoding" |
403 | c96d44df | Iustin Pop | oarr <- fromJResult "Parsing LUXI response" |
404 | c96d44df | Iustin Pop | (decodeStrict s)::Result (JSObject JSValue) |
405 | 262f3e6c | Iustin Pop | let arr = J.fromJSObject oarr |
406 | e8230242 | Iustin Pop | status <- fromObj arr (strOfKey Success)::Result Bool |
407 | 6583e677 | Iustin Pop | let rkey = strOfKey Result |
408 | 3603605a | Iustin Pop | if status |
409 | 3603605a | Iustin Pop | then fromObj arr rkey |
410 | 3603605a | Iustin Pop | else fromObj arr rkey >>= fail |
411 | 6583e677 | Iustin Pop | |
412 | 6583e677 | Iustin Pop | -- | Generic luxi method call. |
413 | 683b1ca7 | Iustin Pop | callMethod :: LuxiOp -> Client -> IO (Result JSValue) |
414 | 683b1ca7 | Iustin Pop | callMethod method s = do |
415 | 683b1ca7 | Iustin Pop | sendMsg s $ buildCall method |
416 | 6583e677 | Iustin Pop | result <- recvMsg s |
417 | 6583e677 | Iustin Pop | let rval = validateResult result |
418 | 6583e677 | Iustin Pop | return rval |
419 | 9a2ff880 | Iustin Pop | |
420 | 619e89c8 | Iustin Pop | -- | Parses a job ID. |
421 | 619e89c8 | Iustin Pop | parseJobId :: JSValue -> Result JobId |
422 | 76b62028 | Iustin Pop | parseJobId (JSString x) = tryRead "parsing job id" . fromJSString $ x |
423 | 76b62028 | Iustin Pop | parseJobId (JSRational _ x) = |
424 | 76b62028 | Iustin Pop | if denominator x /= 1 |
425 | 76b62028 | Iustin Pop | then Bad $ "Got fractional job ID from master daemon?! Value:" ++ show x |
426 | 76b62028 | Iustin Pop | -- FIXME: potential integer overflow here on 32-bit platforms |
427 | 76b62028 | Iustin Pop | else Ok . fromIntegral . numerator $ x |
428 | 619e89c8 | Iustin Pop | parseJobId x = Bad $ "Wrong type/value for job id: " ++ show x |
429 | 619e89c8 | Iustin Pop | |
430 | 619e89c8 | Iustin Pop | -- | Parse job submission result. |
431 | 619e89c8 | Iustin Pop | parseSubmitJobResult :: JSValue -> Result JobId |
432 | 619e89c8 | Iustin Pop | parseSubmitJobResult (JSArray [JSBool True, v]) = parseJobId v |
433 | 619e89c8 | Iustin Pop | parseSubmitJobResult (JSArray [JSBool False, JSString x]) = |
434 | 619e89c8 | Iustin Pop | Bad (fromJSString x) |
435 | 619e89c8 | Iustin Pop | parseSubmitJobResult v = Bad $ "Unknown result from the master daemon" ++ |
436 | 619e89c8 | Iustin Pop | show v |
437 | 619e89c8 | Iustin Pop | |
438 | 9a2ff880 | Iustin Pop | -- | Specialized submitManyJobs call. |
439 | ccc817a2 | Iustin Pop | submitManyJobs :: Client -> [[OpCode]] -> IO (Result [JobId]) |
440 | 9a2ff880 | Iustin Pop | submitManyJobs s jobs = do |
441 | 683b1ca7 | Iustin Pop | rval <- callMethod (SubmitManyJobs jobs) s |
442 | 9a2ff880 | Iustin Pop | -- map each result (status, payload) pair into a nice Result ADT |
443 | 9a2ff880 | Iustin Pop | return $ case rval of |
444 | 9a2ff880 | Iustin Pop | Bad x -> Bad x |
445 | 619e89c8 | Iustin Pop | Ok (JSArray r) -> mapM parseSubmitJobResult r |
446 | 9a2ff880 | Iustin Pop | x -> Bad ("Cannot parse response from Ganeti: " ++ show x) |
447 | 9a2ff880 | Iustin Pop | |
448 | 9a2ff880 | Iustin Pop | -- | Custom queryJobs call. |
449 | ccc817a2 | Iustin Pop | queryJobsStatus :: Client -> [JobId] -> IO (Result [JobStatus]) |
450 | 9a2ff880 | Iustin Pop | queryJobsStatus s jids = do |
451 | 76b62028 | Iustin Pop | rval <- callMethod (QueryJobs jids ["status"]) s |
452 | 9a2ff880 | Iustin Pop | return $ case rval of |
453 | 9a2ff880 | Iustin Pop | Bad x -> Bad x |
454 | 9a2ff880 | Iustin Pop | Ok y -> case J.readJSON y::(J.Result [[JobStatus]]) of |
455 | 9a2ff880 | Iustin Pop | J.Ok vals -> if any null vals |
456 | 9a2ff880 | Iustin Pop | then Bad "Missing job status field" |
457 | 9a2ff880 | Iustin Pop | else Ok (map head vals) |
458 | 9a2ff880 | Iustin Pop | J.Error x -> Bad x |