-}
+{-
+
+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)
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.Types
+import Ganeti.HTools.Loader (RqType(..), Request(..))
-- | Command line options structure.
data Options = Options
"show help"
]
--- | Compute online nodes from a NodeList
-getOnline :: NodeList -> [Node.Node]
-getOnline = filter (not . Node.offline) . Container.elems
-
--- | 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 = getOnline 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 = getOnline 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 = getOnline nl
- inst = Container.find xid il
- ex_idx' = (Instance.pnode inst):ex_idx
- valid_nodes = filter (not . flip elem ex_idx' . idx) all_nodes
- valid_idxes = map Node.idx valid_nodes
- 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 :: (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' = 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])]
+ else let sols' = concatMap (\ (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
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)
+ 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
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 Request _ _ _ csf = request
+ sols = processRequest request >>= filterFails >>= processResults
let (ok, info, rn) = case sols of
Ok (info, sn) -> (True, "Request successful: " ++ info,
- map ((++ csf) . name) sn)
+ map ((++ csf) . Node.name) sn)
Bad s -> (False, "Request failed: " ++ s, [])
resp = formatResponse ok info rn
putStrLn resp
projects / ganeti-local / blobdiff