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, 2010 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
52 import qualified Ganeti.HTools.Group as Group
54 import Ganeti.HTools.Types
55 import Ganeti.HTools.CLI
56 import Ganeti.HTools.Utils (sepSplit, tryRead)
59 wrapIO :: IO (Result a) -> IO (Result a)
60 wrapIO = flip catch (return . Bad . show)
62 parseUtilisation :: String -> Result (String, DynUtil)
63 parseUtilisation line =
64 let columns = sepSplit ' ' line
66 [name, cpu, mem, dsk, net] -> do
67 rcpu <- tryRead name cpu
68 rmem <- tryRead name mem
69 rdsk <- tryRead name dsk
70 rnet <- tryRead name net
71 let du = DynUtil { cpuWeight = rcpu, memWeight = rmem
72 , dskWeight = rdsk, netWeight = rnet }
74 _ -> Bad $ "Cannot parse line " ++ line
76 -- | External tool data loader from a variety of sources.
77 loadExternalData :: Options
78 -> IO (Group.List, Node.List, Instance.List, [String])
79 loadExternalData opts = do
80 let mhost = optMaster opts
82 tfile = optDataFile opts
83 simdata = optNodeSim opts
85 setLuxi = isJust lsock
86 setSim = isJust simdata
87 setFile = isJust tfile
88 allSet = filter id [setRapi, setLuxi, setFile]
89 exTags = case optExTags opts of
91 Just etl -> map (++ ":") etl
92 exInsts = optExInst opts
94 when (length allSet > 1) $
96 hPutStrLn stderr ("Error: Only one of the rapi, luxi, and data" ++
97 " files options should be given.")
98 exitWith $ ExitFailure 1
100 util_contents <- (case optDynuFile opts of
101 Just path -> readFile path
102 Nothing -> return "")
103 let util_data = mapM parseUtilisation $ lines util_contents
104 util_data' <- (case util_data of
107 hPutStrLn stderr ("Error: can't parse utilisation" ++
109 exitWith $ ExitFailure 1)
114 return $ Bad "RAPI/curl backend disabled at compile time"
116 wrapIO $ Rapi.loadData mhost
118 | setLuxi -> wrapIO $ Luxi.loadData $ fromJust lsock
119 | setSim -> Simu.loadData $ fromJust simdata
120 | setFile -> wrapIO $ Text.loadData $ fromJust tfile
121 | otherwise -> return $ Bad "No backend selected! Exiting."
123 let ldresult = input_data >>= Loader.mergeData util_data' exTags exInsts
124 (gl, loaded_nl, il, tags) <-
128 hPrintf stderr "Error: failed to load data. Details:\n%s\n" s
130 exitWith $ ExitFailure 1
132 let (fix_msgs, fixed_nl) = Loader.checkData loaded_nl il
134 unless (null fix_msgs || optVerbose opts == 0) $ do
135 hPutStrLn stderr "Warning: cluster has inconsistent data:"
136 hPutStrLn stderr . unlines . map (printf " - %s") $ fix_msgs
138 return (gl, fixed_nl, il, tags)