-}
+{-
+
+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.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
- { 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 :: (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 = [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
+ (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 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, [])
- 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 (ginfo, (_, _, sn)) -> (True, "Request successful: " ++ ginfo,
+ map snd sn)
+ Bad s -> (False, "Request failed: " ++ s, [])
+ resp = formatResponse ok info rq rn
putStrLn resp
projects / ganeti-local / blobdiff