X-Git-Url: https://code.grnet.gr/git/ganeti-local/blobdiff_plain/842e37644832dacda53a44d48e53a5e0bdcb7ebf..0427285d1a548b8ad4469ed8eaf5f661bf942461:/hail.hs diff --git a/hail.hs b/hail.hs index b879ae1..7690f44 100644 --- a/hail.hs +++ b/hail.hs @@ -2,136 +2,76 @@ -} +{- + +Copyright (C) 2009 Google Inc. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301, USA. + +-} + module Main (main) where import Data.List import Data.Function -import Data.Maybe (isJust, fromJust) import Monad import System import System.IO -import System.Console.GetOpt import qualified System import Text.Printf (printf) -import qualified Ganeti.HTools.Container as Container import qualified Ganeti.HTools.Cluster as Cluster import qualified Ganeti.HTools.Node as Node -import qualified Ganeti.HTools.Instance as Instance -import qualified Ganeti.HTools.CLI as CLI + +import Ganeti.HTools.CLI import Ganeti.HTools.IAlloc import Ganeti.HTools.Types - --- | Command line options structure. -data Options = Options - { optShowVer :: Bool -- ^ Just show the program version - , optShowHelp :: Bool -- ^ Just show the help - } deriving Show - --- | Default values for the command line options. -defaultOptions :: Options -defaultOptions = Options - { optShowVer = False - , optShowHelp = False - } - -instance CLI.CLIOptions Options where - showVersion = optShowVer - showHelp = optShowHelp +import Ganeti.HTools.Loader (RqType(..), Request(..)) -- | Options list and functions -options :: [OptDescr (Options -> Options)] -options = - [ Option ['V'] ["version"] - (NoArg (\ opts -> opts { optShowVer = True})) - "show the version of the program" - , Option ['h'] ["help"] - (NoArg (\ opts -> opts { optShowHelp = True})) - "show help" - ] - --- | Try to allocate an instance on the cluster -tryAlloc :: (Monad m) => - NodeList - -> InstanceList - -> Instance.Instance - -> Int - -> m [(Maybe NodeList, [Node.Node])] -tryAlloc nl _ inst 2 = - let all_nodes = Container.elems nl - all_pairs = liftM2 (,) all_nodes all_nodes - ok_pairs = filter (\(x, y) -> Node.idx x /= Node.idx y) all_pairs - sols = map (\(p, s) -> - (fst $ Cluster.allocateOnPair nl inst p s, [p, s])) - ok_pairs - in return sols - -tryAlloc nl _ inst 1 = - let all_nodes = Container.elems nl - sols = map (\p -> (fst $ Cluster.allocateOnSingle nl inst p, [p])) - all_nodes - in return sols - -tryAlloc _ _ _ reqn = fail $ "Unsupported number of alllocation \ - \destinations required (" ++ (show reqn) ++ - "), only two supported" - --- | Try to allocate an instance on the cluster -tryReloc :: (Monad m) => - NodeList - -> InstanceList - -> Int - -> Int - -> [Int] - -> m [(Maybe NodeList, [Node.Node])] -tryReloc nl il xid 1 ex_idx = - let all_nodes = Container.elems nl - inst = Container.find xid il - valid_nodes = filter (not . flip elem ex_idx . idx) all_nodes - valid_idxes = map Node.idx valid_nodes - nl' = Container.map (\n -> if elem (Node.idx n) ex_idx then - Node.setOffline n True - else n) nl - sols1 = map (\x -> let (mnl, _, _, _) = - Cluster.applyMove nl' inst - (Cluster.ReplaceSecondary x) - in (mnl, [Container.find x nl']) - ) valid_idxes - in return sols1 - -tryReloc _ _ _ reqn _ = fail $ "Unsupported number of relocation \ - \destinations required (" ++ (show reqn) ++ - "), only one supported" - -filterFails :: (Monad m) => [(Maybe NodeList, [Node.Node])] - -> m [(NodeList, [Node.Node])] -filterFails sols = - if null sols then fail "No nodes onto which to allocate at all" - else let sols' = filter (isJust . fst) sols - in if null sols' then - fail "No valid allocation solutions" - else - return $ map (\(x, y) -> (fromJust x, y)) sols' - -processResults :: (Monad m) => [(NodeList, [Node.Node])] - -> m (String, [Node.Node]) -processResults sols = - let sols' = map (\(nl', ns) -> (Cluster.compCV nl', ns)) sols - sols'' = sortBy (compare `on` fst) sols' - (best, w) = head sols'' - (worst, l) = last sols'' - info = printf "Valid results: %d, best score: %.8f for node(s) %s, \ - \worst score: %.8f for node(s) %s" (length sols'') - best (intercalate "/" . map Node.name $ w) - worst (intercalate "/" . map Node.name $ l) - in return (info, w) +options :: [OptType] +options = [oShowVer, oShowHelp] + +processResults :: (Monad m) => Cluster.AllocSolution -> m (String, [Node.Node]) +processResults (fstats, succ, sols) = + case sols of + Nothing -> fail "No valid allocation solutions" + Just (best, (_, _, w)) -> + let tfails = length fstats + info = printf "successes %d, failures %d,\ + \ best score: %.8f for node(s) %s" + succ tfails + best (intercalate "/" . map Node.name $ w)::String + in return (info, w) + +-- | Process a request and return new node lists +processRequest :: Request + -> Result Cluster.AllocSolution +processRequest request = + let Request rqtype nl il _ = request + in case rqtype of + Allocate xi reqn -> Cluster.tryAlloc nl il xi reqn + Relocate idx reqn exnodes -> Cluster.tryReloc nl il idx reqn exnodes -- | Main function. main :: IO () main = do cmd_args <- System.getArgs - (_, args) <- CLI.parseOpts cmd_args "hail" options defaultOptions + (_, args) <- parseOpts cmd_args "hail" options when (null args) $ do hPutStrLn stderr "Error: this program needs an input file." @@ -142,19 +82,16 @@ main = do request <- case (parseData input_data) of Bad err -> do - putStrLn $ "Error: " ++ err + hPutStrLn stderr $ "Error: " ++ err exitWith $ ExitFailure 1 Ok rq -> return rq - let Request rqtype nl il csf = request - new_nodes = case rqtype of - Allocate xi reqn -> tryAlloc nl il xi reqn - Relocate idx reqn exnodes -> - tryReloc nl il idx reqn exnodes - let sols = new_nodes >>= filterFails >>= processResults - let (ok, info, rn) = case sols of - Ok (info, sn) -> (True, "Request successful: " ++ info, - map ((++ csf) . name) sn) - Bad s -> (False, "Request failed: " ++ s, []) + let Request _ _ _ csf = request + sols = processRequest request >>= processResults + let (ok, info, rn) = + case sols of + Ok (info, sn) -> (True, "Request successful: " ++ info, + map ((++ csf) . Node.name) sn) + Bad s -> (False, "Request failed: " ++ s, []) resp = formatResponse ok info rn putStrLn resp