1 {-| Scan clusters via RAPI or LUXI and write state data files.
7 Copyright (C) 2009, 2010, 2011 Google Inc.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
26 module Ganeti.HTools.Program.Hscan (main) where
29 import Data.Maybe (isJust, fromJust, fromMaybe)
30 import System (exitWith, ExitCode(..))
32 import System.FilePath
33 import qualified System
35 import Text.Printf (printf)
37 import qualified Ganeti.HTools.Container as Container
38 import qualified Ganeti.HTools.Cluster as Cluster
39 import qualified Ganeti.HTools.Node as Node
40 import qualified Ganeti.HTools.Instance as Instance
41 import qualified Ganeti.HTools.Rapi as Rapi
42 import qualified Ganeti.HTools.Luxi as Luxi
43 import Ganeti.HTools.Loader (checkData, mergeData, ClusterData(..))
44 import Ganeti.HTools.Text (serializeCluster)
46 import Ganeti.HTools.CLI
47 import Ganeti.HTools.Types
49 -- | Options list and functions.
61 -- | Return a one-line summary of cluster state.
62 printCluster :: Node.List -> Instance.List
65 let (bad_nodes, bad_instances) = Cluster.computeBadItems nl il
66 ccv = Cluster.compCV nl
67 nodes = Container.elems nl
68 insts = Container.elems il
69 t_ram = sum . map Node.tMem $ nodes
70 t_dsk = sum . map Node.tDsk $ nodes
71 f_ram = sum . map Node.fMem $ nodes
72 f_dsk = sum . map Node.fDsk $ nodes
74 printf "%5d %5d %5d %5d %6.0f %6d %6.0f %6d %.8f"
75 (length nodes) (length insts)
76 (length bad_nodes) (length bad_instances)
78 (t_dsk / 1024) (f_dsk `div` 1024)
82 -- | Replace slashes with underscore for saving to filesystem.
83 fixSlash :: String -> String
84 fixSlash = map (\x -> if x == '/' then '_' else x)
87 -- | Generates serialized data from loader input.
88 processData :: ClusterData -> Result ClusterData
89 processData input_data = do
90 cdata@(ClusterData _ nl il _) <- mergeData [] [] [] [] input_data
91 let (_, fix_nl) = checkData nl il
92 return cdata { cdNodes = fix_nl }
94 -- | Writes cluster data out.
100 writeData _ name _ (Bad err) =
101 printf "\nError for %s: failed to load data. Details:\n%s\n" name err >>
104 writeData nlen name opts (Ok cdata) = do
105 let fixdata = processData cdata
107 Bad err -> printf "\nError for %s: failed to process data. Details:\n%s\n"
108 name err >> return False
109 Ok processed -> writeDataInner nlen name opts cdata processed
111 -- | Inner function for writing cluster data to disk.
112 writeDataInner :: Int
118 writeDataInner nlen name opts cdata fixdata = do
119 let (ClusterData _ nl il _) = fixdata
120 printf "%-*s " nlen name :: IO ()
122 let shownodes = optShowNodes opts
123 odir = optOutPath opts
124 oname = odir </> fixSlash name
125 putStrLn $ printCluster nl il
127 when (isJust shownodes) $
128 putStr $ Cluster.printNodes nl (fromJust shownodes)
129 writeFile (oname <.> "data") (serializeCluster cdata)
135 cmd_args <- System.getArgs
136 (opts, clusters) <- parseOpts cmd_args "hscan" options
139 let nlen = if null clusters
141 else maximum . map length $ clusters
143 unless (optNoHeaders opts) $
144 printf "%-*s %5s %5s %5s %5s %6s %6s %6s %6s %10s\n" nlen
145 "Name" "Nodes" "Inst" "BNode" "BInst" "t_mem" "f_mem"
146 "t_disk" "f_disk" "Score"
148 when (null clusters) $ do
149 let lsock = fromMaybe defaultLuxiSocket (optLuxi opts)
151 input_data <- Luxi.loadData lsock
152 result <- writeData nlen name opts input_data
153 unless result $ exitWith $ ExitFailure 2
155 results <- mapM (\name -> Rapi.loadData name >>= writeData nlen name opts)
157 unless (all id results) $ exitWith (ExitFailure 2)