X-Git-Url: https://code.grnet.gr/git/ganeti-local/blobdiff_plain/ed41c179b6d505fd7ea019dbf95e7d80d334b724..f4c7d37aa3d8a81bb403381abdfa9d213271fb9e:/hail.hs diff --git a/hail.hs b/hail.hs index ca50131..a408987 100644 --- a/hail.hs +++ b/hail.hs @@ -2,164 +2,103 @@ -} +{- + +Copyright (C) 2009, 2010 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, fromMaybe) +import Data.Maybe (isJust, fromJust) import Monad -import System +import System (exitWith, ExitCode(..)) 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.Utils import Ganeti.HTools.Types - --- | Command line options structure. -data Options = Options - { optShowNodes :: Bool -- ^ Whether to show node status - , optShowCmds :: Maybe FilePath -- ^ Whether to show the command list - , optOneline :: Bool -- ^ Switch output to a single line - , optNodef :: FilePath -- ^ Path to the nodes file - , optNodeSet :: Bool -- ^ The nodes have been set by options - , optInstf :: FilePath -- ^ Path to the instances file - , optInstSet :: Bool -- ^ The insts have been set by options - , optMaxLength :: Int -- ^ Stop after this many steps - , optMaster :: String -- ^ Collect data from RAPI - , optVerbose :: Int -- ^ Verbosity level - , optOffline :: [String] -- ^ Names of offline nodes - , optMinScore :: Cluster.Score -- ^ The minimum score we aim for - , optShowVer :: Bool -- ^ Just show the program version - , optShowHelp :: Bool -- ^ Just show the help - } deriving Show - -instance CLI.CLIOptions Options where - showVersion = optShowVer - showHelp = optShowHelp - --- | Default values for the command line options. -defaultOptions :: Options -defaultOptions = Options - { optShowNodes = False - , optShowCmds = Nothing - , optOneline = False - , optNodef = "nodes" - , optNodeSet = False - , optInstf = "instances" - , optInstSet = False - , optMaxLength = -1 - , optMaster = "" - , optVerbose = 1 - , optOffline = [] - , optMinScore = 1e-9 - , optShowVer = False - , optShowHelp = False - } +import Ganeti.HTools.Loader (RqType(..), Request(..)) -- | Options list and functions -options :: [OptDescr (Options -> Options)] -options = - [ Option ['p'] ["print-nodes"] - (NoArg (\ opts -> opts { optShowNodes = True })) - "print the final node list" - , Option ['C'] ["print-commands"] - (OptArg ((\ f opts -> opts { optShowCmds = Just f }) . fromMaybe "-") - "FILE") - "print the ganeti command list for reaching the solution,\ - \if an argument is passed then write the commands to a file named\ - \ as such" - , Option ['o'] ["oneline"] - (NoArg (\ opts -> opts { optOneline = True })) - "print the ganeti command list for reaching the solution" - , Option ['n'] ["nodes"] - (ReqArg (\ f opts -> opts { optNodef = f, optNodeSet = True }) "FILE") - "the node list FILE" - , Option ['i'] ["instances"] - (ReqArg (\ f opts -> opts { optInstf = f, optInstSet = True }) "FILE") - "the instance list FILE" - , Option ['m'] ["master"] - (ReqArg (\ m opts -> opts { optMaster = m }) "ADDRESS") - "collect data via RAPI at the given ADDRESS" - , Option ['l'] ["max-length"] - (ReqArg (\ i opts -> opts { optMaxLength = (read i)::Int }) "N") - "cap the solution at this many moves (useful for very unbalanced \ - \clusters)" - , Option ['v'] ["verbose"] - (NoArg (\ opts -> opts { optVerbose = (optVerbose opts) + 1 })) - "increase the verbosity level" - , Option ['q'] ["quiet"] - (NoArg (\ opts -> opts { optVerbose = (optVerbose opts) - 1 })) - "decrease the verbosity level" - , Option ['O'] ["offline"] - (ReqArg (\ n opts -> opts { optOffline = n:optOffline opts }) "NODE") - " set node as offline" - , Option ['e'] ["min-score"] - (ReqArg (\ e opts -> opts { optMinScore = read e }) "EPSILON") - " mininum score to aim for" - , 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 :: NodeList - -> InstanceList - -> Instance.Instance - -> Int - -> Result [Node.Node] -tryAlloc nl il xi _ = Bad "alloc not implemented" - --- | Try to allocate an instance on the cluster -tryReloc :: NodeList - -> InstanceList - -> Int - -> Int - -> [Int] - -> Result [Node.Node] -tryReloc nl il xid reqn ex_idx = - let all_nodes = Container.elems nl - valid_nodes = filter (not . flip elem ex_idx . idx) all_nodes - in Ok (take reqn valid_nodes) +options :: [OptType] +options = [oPrintNodes, oShowVer, oShowHelp] + +processResults :: (Monad m) => + RqType -> Cluster.AllocSolution + -> m Cluster.AllocSolution +processResults _ (Cluster.AllocSolution { Cluster.asSolutions = [], + Cluster.asLog = msgs }) = + fail $ intercalate ", " msgs + +processResults (Evacuate _) as = return as + +processResults _ as = + case Cluster.asSolutions as of + _:[] -> return as + _ -> fail "Internal error: multiple allocation solutions" + +-- | Process a request and return new node lists +processRequest :: Request + -> Result Cluster.AllocSolution +processRequest request = + let Request rqtype gl nl il _ = request + in case rqtype of + Allocate xi reqn -> Cluster.tryMGAlloc gl nl il xi reqn + Relocate idx reqn exnodes -> Cluster.tryReloc nl il idx reqn exnodes + Evacuate exnodes -> Cluster.tryEvac nl il exnodes -- | Main function. main :: IO () main = do cmd_args <- System.getArgs - (opts, args) <- CLI.parseOpts cmd_args "hail" options - defaultOptions + (opts, args) <- parseOpts cmd_args "hail" options when (null args) $ do hPutStrLn stderr "Error: this program needs an input file." exitWith $ ExitFailure 1 let input_file = head args + shownodes = optShowNodes opts input_data <- readFile input_file 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 (ok, info, rn) = case new_nodes of - Ok sn -> (True, "Request successfull", map name sn) - Bad s -> (False, "Request failed: " ++ s, []) - resp = formatResponse ok info rn + let Request rq _ nl _ _ = request + + when (isJust shownodes) $ do + hPutStrLn stderr "Initial cluster status:" + hPutStrLn stderr $ Cluster.printNodes nl (fromJust shownodes) + + let sols = processRequest request >>= processResults rq + let (ok, info, rn) = + case sols of + Ok as -> (True, "Request successful: " ++ + intercalate ", " (Cluster.asLog as), + Cluster.asSolutions as) + Bad s -> (False, "Request failed: " ++ s, []) + resp = formatResponse ok info rq rn putStrLn resp