X-Git-Url: https://code.grnet.gr/git/ganeti-local/blobdiff_plain/e4c5beaf3ee5cf16fd40573e3afe9a708b58bb4f..b7b29191140fccb55fd2c3ffd70cef76862a1412:/hail.hs?ds=sidebyside diff --git a/hail.hs b/hail.hs index bcaeb5e..d67bd68 100644 --- a/hail.hs +++ b/hail.hs @@ -2,307 +2,113 @@ -} +{- + +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, 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.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 - --- | 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" - ] - -{- | Start computing the solution at the given depth and recurse until -we find a valid solution or we exceed the maximum depth. - --} -iterateDepth :: Cluster.Table -- ^ The starting table - -> Int -- ^ Remaining length - -> Cluster.NameList -- ^ Node idx to name list - -> Cluster.NameList -- ^ Inst idx to name list - -> Int -- ^ Max node name len - -> Int -- ^ Max instance name len - -> [[String]] -- ^ Current command list - -> Bool -- ^ Wheter to be silent - -> Cluster.Score -- ^ Score at which to stop - -> IO (Cluster.Table, [[String]]) -- ^ The resulting table and - -- commands -iterateDepth ini_tbl max_rounds ktn kti nmlen imlen - cmd_strs oneline min_score = - let Cluster.Table ini_nl ini_il ini_cv ini_plc = ini_tbl - all_inst = Container.elems ini_il - node_idx = map Node.idx . filter (not . Node.offline) $ - Container.elems ini_nl - fin_tbl = Cluster.checkMove node_idx ini_tbl all_inst - (Cluster.Table _ _ fin_cv fin_plc) = fin_tbl - ini_plc_len = length ini_plc - fin_plc_len = length fin_plc - allowed_next = (max_rounds < 0 || length fin_plc < max_rounds) - in - do - let - (sol_line, cmds) = Cluster.printSolutionLine ini_il ktn kti - nmlen imlen (head fin_plc) fin_plc_len - upd_cmd_strs = cmds:cmd_strs - unless (oneline || fin_plc_len == ini_plc_len) $ do - putStrLn sol_line - hFlush stdout - (if fin_cv < ini_cv then -- this round made success, try deeper - if allowed_next && fin_cv > min_score - then iterateDepth fin_tbl max_rounds ktn kti - nmlen imlen upd_cmd_strs oneline min_score - -- don't go deeper, but return the better solution - else return (fin_tbl, upd_cmd_strs) - else - return (ini_tbl, cmd_strs)) - --- | Formats the solution for the oneline display -formatOneline :: Double -> Int -> Double -> String -formatOneline ini_cv plc_len fin_cv = - printf "%.8f %d %.8f %8.3f" ini_cv plc_len fin_cv - (if fin_cv == 0 then 1 else (ini_cv / fin_cv)) +options :: [OptType] +options = [oPrintNodes, oShowVer, oShowHelp] + +processResults :: (Monad m) => + RqType -> Cluster.AllocSolution + -> m (String, Cluster.AllocSolution) +processResults _ (_, _, []) = fail "No valid allocation solutions" +processResults (Evacuate _) as@(fstats, successes, sols) = + let best = fst $ head sols + tfails = length fstats + info = printf "for last allocation, successes %d, failures %d,\ + \ best score: %.8f" successes tfails best::String + in return (info, as) + +processResults _ as@(fstats, successes, sols) = + case sols of + (best, (_, _, w)):[] -> + let tfails = length fstats + info = printf "successes %d, failures %d,\ + \ best score: %.8f for node(s) %s" + successes tfails + best (intercalate "/" . map Node.name $ w)::String + in return (info, 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 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 + 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 optShowHelp - - when (optShowVer opts) $ do - putStr $ CLI.showVersion "hbal" - exitWith ExitSuccess + (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 - putStrLn $ show request - exitWith ExitSuccess -{- - (loaded_nl, il, csf, ktn, kti) <- liftM2 Cluster.loadData node_data inst_data - let (fix_msgs, fixed_nl) = Cluster.checkData loaded_nl il ktn kti - - unless (null fix_msgs || verbose == 0) $ do - putStrLn "Warning: cluster has inconsistent data:" - putStrLn . unlines . map (\s -> printf " - %s" s) $ fix_msgs - - let offline_names = optOffline opts - all_names = snd . unzip $ ktn - offline_wrong = filter (\n -> not $ elem n all_names) offline_names - offline_indices = fst . unzip . - filter (\(_, n) -> elem n offline_names) $ ktn + let Request rq nl _ _ = request - when (length offline_wrong > 0) $ do - printf "Wrong node name(s) set as offline: %s\n" - (commaJoin offline_wrong) - exitWith $ ExitFailure 1 - - let nl = Container.map (\n -> if elem (Node.idx n) offline_indices - then Node.setOffline n True - else n) fixed_nl - - when (Container.size il == 0) $ do - (if oneline then - putStrLn $ formatOneline 0 0 0 - else - printf "Cluster is empty, exiting.\n") - exitWith ExitSuccess - - - unless oneline $ printf "Loaded %d nodes, %d instances\n" - (Container.size nl) - (Container.size il) - - when (length csf > 0 && not oneline && verbose > 1) $ do - printf "Note: Stripping common suffix of '%s' from names\n" csf - - let (bad_nodes, bad_instances) = Cluster.computeBadItems nl il - unless (oneline || verbose == 0) $ printf - "Initial check done: %d bad nodes, %d bad instances.\n" - (length bad_nodes) (length bad_instances) - - when (length bad_nodes > 0) $ do - putStrLn "Cluster is not N+1 happy, continuing but no guarantee \ - \that the cluster will end N+1 happy." - - when (optShowNodes opts) $ - do - putStrLn "Initial cluster status:" - putStrLn $ Cluster.printNodes ktn nl - - let ini_cv = Cluster.compCV nl - ini_tbl = Cluster.Table nl il ini_cv [] - min_cv = optMinScore opts + when (isJust shownodes) $ do + hPutStrLn stderr "Initial cluster status:" + hPutStrLn stderr $ Cluster.printNodes nl (fromJust shownodes) - when (ini_cv < min_cv) $ do - (if oneline then - putStrLn $ formatOneline ini_cv 0 ini_cv - else printf "Cluster is already well balanced (initial score %.6g,\n\ - \minimum score %.6g).\nNothing to do, exiting\n" - ini_cv min_cv) - exitWith ExitSuccess - - unless oneline (if verbose > 2 then - printf "Initial coefficients: overall %.8f, %s\n" - ini_cv (Cluster.printStats nl) - else - printf "Initial score: %.8f\n" ini_cv) - - unless oneline $ putStrLn "Trying to minimize the CV..." - let mlen_fn = maximum . (map length) . snd . unzip - imlen = mlen_fn kti - nmlen = mlen_fn ktn - - (fin_tbl, cmd_strs) <- iterateDepth ini_tbl (optMaxLength opts) - ktn kti nmlen imlen [] oneline min_cv - let (Cluster.Table fin_nl _ fin_cv fin_plc) = fin_tbl - ord_plc = reverse fin_plc - sol_msg = if null fin_plc - then printf "No solution found\n" - else (if verbose > 2 - then printf "Final coefficients: overall %.8f, %s\n" - fin_cv (Cluster.printStats fin_nl) - else printf "Cluster score improved from %.8f to %.8f\n" - ini_cv fin_cv - ) - - unless oneline $ putStr sol_msg - - unless (oneline || verbose == 0) $ - printf "Solution length=%d\n" (length ord_plc) - - let cmd_data = Cluster.formatCmds . reverse $ cmd_strs - - when (isJust $ optShowCmds opts) $ - do - let out_path = fromJust $ optShowCmds opts - putStrLn "" - (if out_path == "-" then - printf "Commands to run to reach the above solution:\n%s" - (unlines . map (" " ++) . - filter (/= "check") . - lines $ cmd_data) - else do - writeFile out_path (CLI.shTemplate ++ cmd_data) - printf "The commands have been written to file '%s'\n" out_path) - - when (optShowNodes opts) $ - do - let (orig_mem, orig_disk) = Cluster.totalResources nl - (final_mem, final_disk) = Cluster.totalResources fin_nl - putStrLn "" - putStrLn "Final cluster status:" - putStrLn $ Cluster.printNodes ktn fin_nl - when (verbose > 3) $ - do - printf "Original: mem=%d disk=%d\n" orig_mem orig_disk - printf "Final: mem=%d disk=%d\n" final_mem final_disk - when oneline $ - putStrLn $ formatOneline ini_cv (length ord_plc) fin_cv --} + let sols = processRequest request >>= processResults rq + let (ok, info, rn) = + case sols of + Ok (ginfo, (_, _, sn)) -> (True, "Request successful: " ++ ginfo, + map snd sn) + Bad s -> (False, "Request failed: " ++ s, []) + resp = formatResponse ok info rq rn + putStrLn resp