-}
+{-
+
+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 Monad
import System
import System.IO
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.IAlloc
-import Ganeti.HTools.Utils
import Ganeti.HTools.Types
+import Ganeti.HTools.Loader (RqType(..), Request(..))
-- | 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
+ { 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
+ { optShowVer = False
, optShowHelp = False
}
+instance CLI.CLIOptions Options where
+ showVersion = optShowVer
+ showHelp = optShowHelp
+
-- | 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"]
+ [ Option ['V'] ["version"]
(NoArg (\ opts -> opts { optShowVer = True}))
"show the version of the program"
, Option ['h'] ["help"]
"show help"
]
--- | Try to allocate an instance on the cluster
-tryAlloc :: NodeList
- -> InstanceList
- -> Instance.Instance
- -> Int
- -> Result (String, [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 (String, [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, x)
- ) valid_idxes
- sols2 = filter (isJust . fst) sols1
- in if null sols1 then
- Bad "No nodes onto which to relocate at all"
- else if null sols2 then
- Bad "No valid solutions"
- else
- let sols3 = map (\(x, y) ->
- (Cluster.compCV $ fromJust x,
- (fromJust x, y)))
- sols2
- sols4 = sortBy (compare `on` fst) sols3
- (best, (final_nl, winner)) = head sols4
- (worst, (_, loser)) = last sols4
- wnode = Container.find winner final_nl
- lnode = Container.find loser nl
- info = printf "Valid results: %d, best score: %.8f \
- \(node %s), worst score: %.8f (node %s)"
- (length sols3) best (Node.name wnode)
- worst (Node.name lnode)
- in Ok (info, [wnode])
-
-tryReloc _ _ _ reqn _ = Bad $ "Unsupported number of relocation \
- \destinations required (" ++ (show reqn) ++
- "), only one supported"
+
+filterFails :: (Monad m) => [(OpResult Node.List,
+ Instance.Instance, [Node.Node])]
+ -> m [(Node.List, [Node.Node])]
+filterFails sols =
+ if null sols then fail "No nodes onto which to allocate at all"
+ else let sols' = concat . map (\ (onl, _, nn) ->
+ case onl of
+ OpFail _ -> []
+ OpGood gnl -> [(gnl, nn)]
+ ) $ sols
+ in
+ if null sols' then
+ fail "No valid allocation solutions"
+ else
+ return sols'
+
+processResults :: (Monad m) => [(Node.List, [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))::String
+ in return (info, w)
+
+-- | Process a request and return new node lists
+processRequest :: Request
+ -> Result [(OpResult Node.List, Instance.Instance, [Node.Node])]
+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
-- | Main function.
main :: IO ()
main = do
cmd_args <- System.getArgs
- (opts, args) <- CLI.parseOpts cmd_args "hail" options
- defaultOptions
+ (_, args) <- CLI.parseOpts cmd_args "hail" options defaultOptions
when (null args) $ do
hPutStrLn stderr "Error: this program needs an input file."
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
+ let Request _ _ _ csf = request
+ sols = processRequest request >>= filterFails >>= processResults
+ let (ok, info, rn) = case sols of
Ok (info, sn) -> (True, "Request successful: " ++ info,
- map name sn)
+ map ((++ csf) . Node.name) sn)
Bad s -> (False, "Request failed: " ++ s, [])
resp = formatResponse ok info rn
putStrLn resp
projects / ganeti-local / blobdiff