root / htools / Ganeti / HTools / Program / Hinfo.hs @ 26d62e4c
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{-| Cluster information printer. |
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-} |
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{- |
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Copyright (C) 2012 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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module Ganeti.HTools.Program.Hinfo (main, options) where |
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import Control.Monad |
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import Data.List |
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import System.Exit |
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import System.IO |
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import Text.Printf (printf) |
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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.Group as Group |
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import qualified Ganeti.HTools.Instance as Instance |
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import Ganeti.HTools.CLI |
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import Ganeti.HTools.ExtLoader |
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import Ganeti.HTools.Loader |
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import Ganeti.Utils |
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-- | Options list and functions. |
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options :: [OptType] |
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options = |
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[ oPrintNodes |
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, oPrintInsts |
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, oDataFile |
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, oRapiMaster |
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, oLuxiSocket |
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, oIAllocSrc |
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, oVerbose |
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, oQuiet |
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, oOfflineNode |
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] |
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-- | Group information data-type. |
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data GroupInfo = GroupInfo { giName :: String |
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, giNodeCount :: Int |
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, giInstCount :: Int |
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, giBadNodes :: Int |
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, giBadInsts :: Int |
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, giN1Status :: Bool |
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, giScore :: Double |
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} |
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-- | Node group statistics. |
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calcGroupInfo :: Group.Group |
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-> Node.List |
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-> Instance.List |
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-> GroupInfo |
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calcGroupInfo g nl il = |
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let nl_size = Container.size nl |
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il_size = Container.size il |
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(bad_nodes, bad_instances) = Cluster.computeBadItems nl il |
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bn_size = length bad_nodes |
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bi_size = length bad_instances |
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n1h = bn_size == 0 |
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score = Cluster.compCV nl |
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in GroupInfo (Group.name g) nl_size il_size bn_size bi_size n1h score |
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-- | Helper to format one group row result. |
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groupRowFormatHelper :: GroupInfo -> [String] |
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groupRowFormatHelper gi = |
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[ giName gi |
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, printf "%d" $ giNodeCount gi |
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, printf "%d" $ giInstCount gi |
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, printf "%d" $ giBadNodes gi |
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, printf "%d" $ giBadInsts gi |
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, show $ giN1Status gi |
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, printf "%.8f" $ giScore gi |
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] |
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-- | Print node group information. |
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showGroupInfo :: Int -> Group.List -> Node.List -> Instance.List -> IO () |
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showGroupInfo verbose gl nl il = do |
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let cgrs = map (\(gdx, (gnl, gil)) -> |
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calcGroupInfo (Container.find gdx gl) gnl gil) $ |
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Cluster.splitCluster nl il |
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cn1h = all giN1Status cgrs |
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grs = map groupRowFormatHelper cgrs |
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header = ["Group", "Nodes", "Instances", "Bad_Nodes", "Bad_Instances", |
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"N+1", "Score"] |
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when (verbose > 1) $ |
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printf "Node group information:\n%s" |
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(printTable " " header grs [False, True, True, True, True, |
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False, True]) |
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printf "Cluster is N+1 %s\n" $ if cn1h then "happy" else "unhappy" |
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-- | Gather and print split instances. |
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splitInstancesInfo :: Int -> Node.List -> Instance.List -> IO () |
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splitInstancesInfo verbose nl il = do |
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let split_insts = Cluster.findSplitInstances nl il |
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if null split_insts |
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then |
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when (verbose > 1) $ |
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putStrLn "No split instances found"::IO () |
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else do |
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putStrLn "Found instances belonging to multiple node groups:" |
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mapM_ (\i -> hPutStrLn stderr $ " " ++ Instance.name i) split_insts |
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-- | Print common (interesting) information. |
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commonInfo :: Int -> Group.List -> Node.List -> Instance.List -> IO () |
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commonInfo verbose gl nl il = do |
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when (Container.null il && verbose > 1) $ |
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printf "Cluster is empty.\n"::IO () |
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let nl_size = Container.size nl |
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il_size = Container.size il |
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gl_size = Container.size gl |
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printf "Loaded %d %s, %d %s, %d %s\n" |
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nl_size (plural nl_size "node" "nodes") |
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il_size (plural il_size "instance" "instances") |
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gl_size (plural gl_size "node group" "node groups")::IO () |
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let csf = commonSuffix nl il |
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when (not (null csf) && verbose > 2) $ |
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printf "Note: Stripping common suffix of '%s' from names\n" csf |
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-- | Main function. |
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main :: Options -> [String] -> IO () |
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main opts args = do |
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unless (null args) $ do |
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hPutStrLn stderr "Error: this program doesn't take any arguments." |
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exitWith $ ExitFailure 1 |
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let verbose = optVerbose opts |
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shownodes = optShowNodes opts |
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showinsts = optShowInsts opts |
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(ClusterData gl fixed_nl ilf ctags ipol) <- loadExternalData opts |
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putStrLn $ "Loaded cluster tags: " ++ intercalate "," ctags |
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when (verbose > 2) . |
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putStrLn $ "Loaded cluster ipolicy: " ++ show ipol |
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nlf <- setNodeStatus opts fixed_nl |
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commonInfo verbose gl nlf ilf |
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splitInstancesInfo verbose nlf ilf |
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showGroupInfo verbose gl nlf ilf |
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maybePrintInsts showinsts "Instances" (Cluster.printInsts nlf ilf) |
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maybePrintNodes shownodes "Cluster" (Cluster.printNodes nlf) |
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printf "Cluster coefficients:\n%s" (Cluster.printStats " " nlf)::IO () |
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printf "Cluster score: %.8f\n" (Cluster.compCV nlf) |