root / hscan.hs @ 78694255
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{-| Scan clusters via RAPI and write instance/node data files. |
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-} |
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{- |
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Copyright (C) 2009 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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-} |
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module Main (main) where |
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|
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import Data.List |
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import Data.Function |
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import Monad |
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import System |
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import System.IO |
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import System.FilePath |
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import System.Console.GetOpt |
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import qualified System |
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|
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import Text.Printf (printf) |
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|
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import qualified Ganeti.HTools.Container as Container |
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import qualified Ganeti.HTools.Cluster as Cluster |
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import qualified Ganeti.HTools.Node as Node |
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import qualified Ganeti.HTools.Instance as Instance |
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import qualified Ganeti.HTools.CLI as CLI |
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import qualified Ganeti.HTools.Rapi as Rapi |
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import qualified Ganeti.HTools.Loader as Loader |
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import Ganeti.HTools.Types |
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|
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-- | Command line options structure. |
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data Options = Options |
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{ optShowNodes :: Bool -- ^ Whether to show node status |
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, optOutPath :: FilePath -- ^ Path to the output directory |
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, optVerbose :: Int -- ^ Verbosity level |
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, optNoHeader :: Bool -- ^ Do not show a header line |
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, optShowVer :: Bool -- ^ Just show the program version |
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, optShowHelp :: Bool -- ^ Just show the help |
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} deriving Show |
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|
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instance CLI.CLIOptions Options where |
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showVersion = optShowVer |
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showHelp = optShowHelp |
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|
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-- | Default values for the command line options. |
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defaultOptions :: Options |
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defaultOptions = Options |
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{ optShowNodes = False |
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, optOutPath = "." |
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, optVerbose = 0 |
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, optNoHeader = False |
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, optShowVer = False |
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, optShowHelp = False |
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} |
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|
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-- | Options list and functions |
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options :: [OptDescr (Options -> Options)] |
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options = |
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[ Option ['p'] ["print-nodes"] |
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(NoArg (\ opts -> opts { optShowNodes = True })) |
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"print the final node list" |
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, Option ['d'] ["output-dir"] |
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(ReqArg (\ d opts -> opts { optOutPath = d }) "PATH") |
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"directory in which to write output files" |
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, Option ['v'] ["verbose"] |
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(NoArg (\ opts -> opts { optVerbose = (optVerbose opts) + 1 })) |
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"increase the verbosity level" |
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, Option [] ["no-headers"] |
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(NoArg (\ opts -> opts { optNoHeader = True })) |
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"do not show a header line" |
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, Option ['V'] ["version"] |
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(NoArg (\ opts -> opts { optShowVer = True})) |
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"show the version of the program" |
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, Option ['h'] ["help"] |
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(NoArg (\ opts -> opts { optShowHelp = True})) |
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"show help" |
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] |
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|
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-- | Serialize a single node |
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serializeNode :: String -> Node.Node -> String |
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serializeNode csf node = |
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let name = Node.name node ++ csf |
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t_mem = (truncate $ Node.t_mem node)::Int |
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t_dsk = (truncate $ Node.t_dsk node)::Int |
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in |
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printf "%s|%d|%d|%d|%d|%d|%c" name |
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t_mem (Node.n_mem node) (Node.f_mem node) |
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t_dsk (Node.f_dsk node) |
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(if Node.offline node then 'Y' else 'N') |
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|
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-- | Generate node file data from node objects |
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serializeNodes :: String -> Node.List -> String |
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serializeNodes csf = |
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unlines . map (serializeNode csf) . Container.elems |
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-- | Serialize a single instance |
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serializeInstance :: String -> Node.List -> Instance.Instance -> String |
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serializeInstance csf nl inst = |
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let |
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iname = Instance.name inst ++ csf |
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pnode = Container.nameOf nl $ Instance.pnode inst |
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snode = Container.nameOf nl $ Instance.snode inst |
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in |
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printf "%s|%d|%d|%s|%s|%s" |
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iname (Instance.mem inst) (Instance.dsk inst) |
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(Instance.run_st inst) |
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pnode snode |
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-- | Generate instance file data from instance objects |
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serializeInstances :: String -> Node.List -> Instance.List -> String |
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serializeInstances csf nl = |
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unlines . map (serializeInstance csf nl) . Container.elems |
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-- | Return a one-line summary of cluster state |
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printCluster :: Node.List -> Instance.List |
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-> String |
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printCluster nl il = |
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let (bad_nodes, bad_instances) = Cluster.computeBadItems nl il |
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ccv = Cluster.compCV nl |
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nodes = Container.elems nl |
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insts = Container.elems il |
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t_ram = sum . map Node.t_mem $ nodes |
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t_dsk = sum . map Node.t_dsk $ nodes |
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f_ram = sum . map Node.f_mem $ nodes |
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f_dsk = sum . map Node.f_dsk $ nodes |
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in |
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printf "%5d %5d %5d %5d %6.0f %6d %6.0f %6d %.8f" |
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(length nodes) (length insts) |
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(length bad_nodes) (length bad_instances) |
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t_ram f_ram |
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(t_dsk / 1024) (f_dsk `div` 1024) |
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ccv |
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|
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-- | Replace slashes with underscore for saving to filesystem |
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fixSlash :: String -> String |
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fixSlash = map (\x -> if x == '/' then '_' else x) |
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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, clusters) <- CLI.parseOpts cmd_args "hscan" options |
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defaultOptions |
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let odir = optOutPath opts |
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nlen = maximum . map length $ clusters |
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unless (optNoHeader opts) $ |
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printf "%-*s %5s %5s %5s %5s %6s %6s %6s %6s %10s\n" nlen |
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"Name" "Nodes" "Inst" "BNode" "BInst" "t_mem" "f_mem" |
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"t_disk" "f_disk" "Score" |
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mapM_ (\ name -> |
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do |
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printf "%-*s " nlen name |
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hFlush stdout |
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input_data <- Rapi.loadData name |
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let ldresult = input_data >>= Loader.mergeData |
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(case ldresult of |
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Bad err -> printf "\nError: failed to load data. \ |
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\Details:\n%s\n" err |
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Ok x -> do |
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let (nl, il, csf) = x |
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(_, fix_nl) = Loader.checkData nl il |
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putStrLn $ printCluster fix_nl il |
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when (optShowNodes opts) $ do |
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putStr $ Cluster.printNodes fix_nl |
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let ndata = serializeNodes csf nl |
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idata = serializeInstances csf nl il |
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oname = odir </> (fixSlash name) |
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writeFile (oname <.> "nodes") ndata |
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writeFile (oname <.> "instances") idata) |
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) clusters |