3 {-| External data loader
5 This module holds the external data loading, and thus is the only one
6 depending (via the specialized Text\/Rapi\/Luxi modules) on the actual
7 libraries implementing the low-level protocols.
13 Copyright (C) 2009 Google Inc.
15 This program is free software; you can redistribute it and/or modify
16 it under the terms of the GNU General Public License as published by
17 the Free Software Foundation; either version 2 of the License, or
18 (at your option) any later version.
20 This program is distributed in the hope that it will be useful, but
21 WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 General Public License for more details.
25 You should have received a copy of the GNU General Public License
26 along with this program; if not, write to the Free Software
27 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
32 module Ganeti.HTools.ExtLoader
37 import Data.Maybe (isJust, fromJust)
41 import Text.Printf (printf, hPrintf)
43 import qualified Ganeti.HTools.Luxi as Luxi
45 import qualified Ganeti.HTools.Rapi as Rapi
47 import qualified Ganeti.HTools.Simu as Simu
48 import qualified Ganeti.HTools.Text as Text
49 import qualified Ganeti.HTools.Loader as Loader
50 import qualified Ganeti.HTools.Instance as Instance
51 import qualified Ganeti.HTools.Node as Node
53 import Ganeti.HTools.Types
54 import Ganeti.HTools.CLI
55 import Ganeti.HTools.Utils (sepSplit, tryRead)
58 wrapIO :: IO (Result a) -> IO (Result a)
59 wrapIO = flip catch (return . Bad . show)
61 parseUtilisation :: String -> Result (String, DynUtil)
62 parseUtilisation line =
63 let columns = sepSplit ' ' line
65 [name, cpu, mem, dsk, net] -> do
66 rcpu <- tryRead name cpu
67 rmem <- tryRead name mem
68 rdsk <- tryRead name dsk
69 rnet <- tryRead name net
70 let du = DynUtil { cpuWeight = rcpu, memWeight = rmem
71 , dskWeight = rdsk, netWeight = rnet }
73 _ -> Bad $ "Cannot parse line " ++ line
75 -- | External tool data loader from a variety of sources.
76 loadExternalData :: Options
77 -> IO (Node.List, Instance.List, [String])
78 loadExternalData opts = do
79 let mhost = optMaster opts
81 tfile = optDataFile opts
82 simdata = optNodeSim opts
84 setLuxi = isJust lsock
85 setSim = isJust simdata
86 setFile = isJust tfile
87 allSet = filter id [setRapi, setLuxi, setFile]
88 exTags = case optExTags opts of
90 Just etl -> map (++ ":") etl
91 exInsts = optExInst opts
93 when (length allSet > 1) $
95 hPutStrLn stderr ("Error: Only one of the rapi, luxi, and data" ++
96 " files options should be given.")
97 exitWith $ ExitFailure 1
99 util_contents <- (case optDynuFile opts of
100 Just path -> readFile path
101 Nothing -> return "")
102 let util_data = mapM parseUtilisation $ lines util_contents
103 util_data' <- (case util_data of
106 hPutStrLn stderr ("Error: can't parse utilisation" ++
108 exitWith $ ExitFailure 1)
113 return $ Bad "RAPI/curl backend disabled at compile time"
115 wrapIO $ Rapi.loadData mhost
117 | setLuxi -> wrapIO $ Luxi.loadData $ fromJust lsock
118 | setSim -> Simu.loadData $ fromJust simdata
119 | setFile -> wrapIO $ Text.loadData $ fromJust tfile
120 | otherwise -> return $ Bad "No backend selected! Exiting."
122 let ldresult = input_data >>= Loader.mergeData util_data' exTags exInsts
123 (loaded_nl, il, tags) <-
127 hPrintf stderr "Error: failed to load data. Details:\n%s\n" s
129 exitWith $ ExitFailure 1
131 let (fix_msgs, fixed_nl) = Loader.checkData loaded_nl il
133 unless (null fix_msgs || optVerbose opts == 0) $ do
134 hPutStrLn stderr "Warning: cluster has inconsistent data:"
135 hPutStrLn stderr . unlines . map (printf " - %s") $ fix_msgs
137 return (fixed_nl, il, tags)