root / htools / hail.hs @ 4162995d
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{-| IAllocator plugin for Ganeti. |
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-} |
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{- |
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Copyright (C) 2009, 2010, 2011 Google Inc. |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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02110-1301, USA. |
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-} |
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module Main (main) where |
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import Control.Monad |
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import Data.Maybe (isJust, fromJust) |
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import System.IO |
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import qualified System |
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import qualified Ganeti.HTools.Cluster as Cluster |
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import Ganeti.HTools.CLI |
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import Ganeti.HTools.IAlloc |
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import Ganeti.HTools.Loader (Request(..), ClusterData(..)) |
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import Ganeti.HTools.ExtLoader (maybeSaveData) |
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-- | Options list and functions |
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options :: [OptType] |
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options = |
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[ oPrintNodes |
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, oSaveCluster |
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, oDataFile |
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, oNodeSim |
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, oVerbose |
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, oShowVer |
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, oShowHelp |
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] |
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-- | Main function. |
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main :: IO () |
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main = do |
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cmd_args <- System.getArgs |
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(opts, args) <- parseOpts cmd_args "hail" options |
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let shownodes = optShowNodes opts |
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verbose = optVerbose opts |
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savecluster = optSaveCluster opts |
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request <- readRequest opts args |
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let Request rq cdata = request |
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when (verbose > 1) $ |
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hPutStrLn stderr $ "Received request: " ++ show rq |
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when (verbose > 2) $ |
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hPutStrLn stderr $ "Received cluster data: " ++ show cdata |
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when (isJust shownodes) $ do |
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hPutStrLn stderr "Initial cluster status:" |
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hPutStrLn stderr $ Cluster.printNodes (cdNodes cdata) |
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(fromJust shownodes) |
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maybeSaveData savecluster "pre-ialloc" "before iallocator run" cdata |
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let (maybe_ni, resp) = runIAllocator request |
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(fin_nl, fin_il) = maybe (cdNodes cdata, cdInstances cdata) id maybe_ni |
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putStrLn resp |
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when (isJust shownodes) $ do |
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hPutStrLn stderr "Final cluster status:" |
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hPutStrLn stderr $ Cluster.printNodes fin_nl (fromJust shownodes) |
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maybeSaveData savecluster "post-ialloc" "after iallocator run" |
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(cdata { cdNodes = fin_nl, cdInstances = fin_il}) |