-}
+{-
+
+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.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(..), ClusterData(..))
+import Ganeti.HTools.ExtLoader (loadExternalData)
-- | Options list and functions
-options :: [OptDescr (Options -> Options)]
+options :: [OptType]
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"
+ [ oPrintNodes
+ , oDataFile
+ , oNodeSim
+ , oShowVer
+ , oShowHelp
]
--- | 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))
-
--- | Main function.
-main :: IO ()
-main = do
- cmd_args <- System.getArgs
- (opts, args) <- CLI.parseOpts cmd_args "hail" options
- defaultOptions
-
+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 (ClusterData 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
+
+-- | Reads the request from the data file(s)
+readRequest :: Options -> [String] -> IO Request
+readRequest opts args = do
when (null args) $ do
hPutStrLn stderr "Error: this program needs an input file."
exitWith $ ExitFailure 1
- let input_file = head args
- input_data <- readFile input_file
-
- request <- case (parseData input_data) of
- Bad err -> do
- putStrLn $ "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
+ input_data <- readFile (head args)
+ r1 <- case (parseData input_data) of
+ Bad err -> do
+ hPutStrLn stderr $ "Error: " ++ err
+ exitWith $ ExitFailure 1
+ Ok rq -> return rq
+ r2 <- if isJust (optDataFile opts) || (not . null . optNodeSim) opts
+ then do
+ cdata <- loadExternalData opts
+ let Request rqt _ = r1
+ return $ Request rqt cdata
+ else return r1
+ return r2
- 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
-
- 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 (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
- )
+-- | Main function.
+main :: IO ()
+main = do
+ cmd_args <- System.getArgs
+ (opts, args) <- parseOpts cmd_args "hail" options
- unless oneline $ putStr sol_msg
+ let shownodes = optShowNodes opts
- unless (oneline || verbose == 0) $
- printf "Solution length=%d\n" (length ord_plc)
+ request <- readRequest opts args
- let cmd_data = Cluster.formatCmds . reverse $ cmd_strs
+ let Request rq cdata = request
- 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 (isJust shownodes) $ do
+ hPutStrLn stderr "Initial cluster status:"
+ hPutStrLn stderr $ Cluster.printNodes (cdNodes cdata)
+ (fromJust shownodes)
- 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 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
projects / ganeti-local / blobdiff