3 {-| Scan clusters via RAPI or LUXI and write state data files.
9 Copyright (C) 2009, 2010 Google Inc.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
28 module Main (main) where
30 import Data.Maybe (isJust, fromJust, fromMaybe)
32 import System (exitWith, ExitCode(..))
34 import System.FilePath
35 import qualified System
37 import Text.Printf (printf)
39 import qualified Ganeti.HTools.Container as Container
40 import qualified Ganeti.HTools.Cluster as Cluster
41 import qualified Ganeti.HTools.Node as Node
42 import qualified Ganeti.HTools.Instance as Instance
44 import qualified Ganeti.HTools.Rapi as Rapi
46 import qualified Ganeti.HTools.Luxi as Luxi
47 import Ganeti.HTools.Loader (checkData, mergeData, ClusterData(..))
48 import Ganeti.HTools.Text (serializeCluster)
50 import Ganeti.HTools.CLI
51 import Ganeti.HTools.Types
53 -- | Options list and functions
65 -- | Return a one-line summary of cluster state
66 printCluster :: Node.List -> Instance.List
69 let (bad_nodes, bad_instances) = Cluster.computeBadItems nl il
70 ccv = Cluster.compCV nl
71 nodes = Container.elems nl
72 insts = Container.elems il
73 t_ram = sum . map Node.tMem $ nodes
74 t_dsk = sum . map Node.tDsk $ nodes
75 f_ram = sum . map Node.fMem $ nodes
76 f_dsk = sum . map Node.fDsk $ nodes
78 printf "%5d %5d %5d %5d %6.0f %6d %6.0f %6d %.8f"
79 (length nodes) (length insts)
80 (length bad_nodes) (length bad_instances)
82 (t_dsk / 1024) (f_dsk `div` 1024)
86 -- | Replace slashes with underscore for saving to filesystem
87 fixSlash :: String -> String
88 fixSlash = map (\x -> if x == '/' then '_' else x)
91 -- | Generates serialized data from loader input.
92 processData :: Result ClusterData -> Result ClusterData
93 processData input_data = do
94 cdata@(ClusterData _ nl il _) <- input_data >>= mergeData [] [] []
95 let (_, fix_nl) = checkData nl il
96 return cdata { cdNodes = fix_nl }
98 -- | Writes cluster data out
102 -> Result ClusterData
104 writeData _ name _ (Bad err) =
105 printf "\nError for %s: failed to load data. Details:\n%s\n" name err >>
108 writeData nlen name opts (Ok cdata) = do
109 let (ClusterData _ nl il _) = cdata
110 printf "%-*s " nlen name :: IO ()
112 let shownodes = optShowNodes opts
113 odir = optOutPath opts
114 oname = odir </> fixSlash name
115 putStrLn $ printCluster nl il
117 when (isJust shownodes) $
118 putStr $ Cluster.printNodes nl (fromJust shownodes)
119 writeFile (oname <.> "data") (serializeCluster cdata)
125 cmd_args <- System.getArgs
126 (opts, clusters) <- parseOpts cmd_args "hscan" options
129 let nlen = if null clusters
131 else maximum . map length $ clusters
133 unless (optNoHeaders opts) $
134 printf "%-*s %5s %5s %5s %5s %6s %6s %6s %6s %10s\n" nlen
135 "Name" "Nodes" "Inst" "BNode" "BInst" "t_mem" "f_mem"
136 "t_disk" "f_disk" "Score"
138 when (null clusters) $ do
139 let lsock = fromMaybe defaultLuxiSocket (optLuxi opts)
141 input_data <- Luxi.loadData lsock
142 result <- writeData nlen name opts (processData input_data)
143 when (not result) $ exitWith $ ExitFailure 2
146 results <- mapM (\ name ->
148 input_data <- Rapi.loadData name
149 writeData nlen name opts (processData input_data)
151 when (not $ all id results) $ exitWith (ExitFailure 2)
153 when (not $ null clusters) $ do
154 putStrLn "RAPI/curl backend disabled at compile time, cannot scan clusters"
155 exitWith $ ExitFailure 1