1 {-| IAllocator plugin for Ganeti.
7 Copyright (C) 2009, 2010, 2011, 2012 Google Inc.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
26 module Ganeti.HTools.Program.Hail (main, options) where
29 import Data.Maybe (fromMaybe, isJust)
33 import qualified Ganeti.HTools.Cluster as Cluster
35 import Ganeti.HTools.CLI
36 import Ganeti.HTools.IAlloc
37 import Ganeti.HTools.Loader (Request(..), ClusterData(..))
38 import Ganeti.HTools.ExtLoader (maybeSaveData, loadExternalData)
40 -- | Options list and functions.
52 wrapReadRequest :: Options -> [String] -> IO Request
53 wrapReadRequest opts args = do
55 hPutStrLn stderr "Error: this program needs an input file."
56 exitWith $ ExitFailure 1
58 r1 <- readRequest (head args)
59 if isJust (optDataFile opts) || (not . null . optNodeSim) opts
61 cdata <- loadExternalData opts
62 let Request rqt _ = r1
63 return $ Request rqt cdata
68 main :: Options -> [String] -> IO ()
70 let shownodes = optShowNodes opts
71 verbose = optVerbose opts
72 savecluster = optSaveCluster opts
74 request <- wrapReadRequest opts args
76 let Request rq cdata = request
79 hPutStrLn stderr $ "Received request: " ++ show rq
82 hPutStrLn stderr $ "Received cluster data: " ++ show cdata
84 maybePrintNodes shownodes "Initial cluster"
85 (Cluster.printNodes (cdNodes cdata))
87 maybeSaveData savecluster "pre-ialloc" "before iallocator run" cdata
89 let (maybe_ni, resp) = runIAllocator request
90 (fin_nl, fin_il) = fromMaybe (cdNodes cdata, cdInstances cdata) maybe_ni
93 maybePrintNodes shownodes "Final cluster" (Cluster.printNodes fin_nl)
95 maybeSaveData savecluster "post-ialloc" "after iallocator run"
96 (cdata { cdNodes = fin_nl, cdInstances = fin_il})