root / htools / Ganeti / HTools / Program / Hail.hs @ 29a30533
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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, 2012 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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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 Ganeti.HTools.Program.Hail |
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( main |
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, options |
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, arguments |
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) where |
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import Control.Monad |
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import Data.Maybe (fromMaybe, isJust) |
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import System.IO |
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import qualified Ganeti.HTools.Cluster as Cluster |
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import Ganeti.Common |
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import Ganeti.HTools.CLI |
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import Ganeti.HTools.Backend.IAlloc |
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import Ganeti.HTools.Loader (Request(..), ClusterData(..)) |
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import Ganeti.HTools.ExtLoader (maybeSaveData, loadExternalData) |
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import Ganeti.Utils |
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-- | Options list and functions. |
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options :: IO [OptType] |
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options = |
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return |
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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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] |
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-- | The list of arguments supported by the program. |
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arguments :: [ArgCompletion] |
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arguments = [ArgCompletion OptComplFile 1 (Just 1)] |
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wrapReadRequest :: Options -> [String] -> IO Request |
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wrapReadRequest opts args = do |
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when (null args) $ exitErr "This program needs an input file." |
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r1 <- readRequest (head args) |
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if isJust (optDataFile opts) || (not . null . optNodeSim) opts |
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then do |
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cdata <- loadExternalData opts |
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let Request rqt _ = r1 |
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return $ Request rqt cdata |
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else return r1 |
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-- | Main function. |
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main :: Options -> [String] -> IO () |
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main opts args = do |
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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 <- wrapReadRequest 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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maybePrintNodes shownodes "Initial cluster" |
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(Cluster.printNodes (cdNodes cdata)) |
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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) = fromMaybe (cdNodes cdata, cdInstances cdata) maybe_ni |
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putStrLn resp |
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maybePrintNodes shownodes "Final cluster" (Cluster.printNodes fin_nl) |
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maybeSaveData savecluster "post-ialloc" "after iallocator run" |
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(cdata { cdNodes = fin_nl, cdInstances = fin_il}) |