1 {-| Implementation of command-line functions.
3 This module holds the common command-line related functions for the
4 binaries, separated into this module since "Ganeti.HTools.Utils" is
5 used in many other places and this is more IO oriented.
11 Copyright (C) 2009, 2010, 2011 Google Inc.
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
18 This program is distributed in the hope that it will be useful, but
19 WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
30 module Ganeti.HTools.CLI
79 import Data.Maybe (fromMaybe)
80 import qualified Data.Version
81 import System.Console.GetOpt
85 import Text.Printf (printf)
87 import qualified Ganeti.HTools.Version as Version(version)
88 import qualified Ganeti.Constants as C
89 import Ganeti.HTools.Types
90 import Ganeti.HTools.Utils
94 -- | The default value for the luxi socket.
96 -- This is re-exported from the "Ganeti.Constants" module.
97 defaultLuxiSocket :: FilePath
98 defaultLuxiSocket = C.masterSocket
102 -- | Command line options structure.
103 data Options = Options
104 { optDataFile :: Maybe FilePath -- ^ Path to the cluster data file
105 , optDiskMoves :: Bool -- ^ Allow disk moves
106 , optInstMoves :: Bool -- ^ Allow instance moves
107 , optDiskTemplate :: DiskTemplate -- ^ The requested disk template
108 , optDynuFile :: Maybe FilePath -- ^ Optional file with dynamic use data
109 , optEvacMode :: Bool -- ^ Enable evacuation mode
110 , optExInst :: [String] -- ^ Instances to be excluded
111 , optExTags :: Maybe [String] -- ^ Tags to use for exclusion
112 , optExecJobs :: Bool -- ^ Execute the commands via Luxi
113 , optGroup :: Maybe GroupID -- ^ The UUID of the group to process
114 , optSelInst :: [String] -- ^ Instances to be excluded
115 , optISpec :: RSpec -- ^ Requested instance specs
116 , optLuxi :: Maybe FilePath -- ^ Collect data from Luxi
117 , optMaster :: String -- ^ Collect data from RAPI
118 , optMaxLength :: Int -- ^ Stop after this many steps
119 , optMcpu :: Double -- ^ Max cpu ratio for nodes
120 , optMdsk :: Double -- ^ Max disk usage ratio for nodes
121 , optMinGain :: Score -- ^ Min gain we aim for in a step
122 , optMinGainLim :: Score -- ^ Limit below which we apply mingain
123 , optMinScore :: Score -- ^ The minimum score we aim for
124 , optNoHeaders :: Bool -- ^ Do not show a header line
125 , optNodeSim :: [String] -- ^ Cluster simulation mode
126 , optOffline :: [String] -- ^ Names of offline nodes
127 , optOneline :: Bool -- ^ Switch output to a single line
128 , optOutPath :: FilePath -- ^ Path to the output directory
129 , optSaveCluster :: Maybe FilePath -- ^ Save cluster state to this file
130 , optShowCmds :: Maybe FilePath -- ^ Whether to show the command list
131 , optShowHelp :: Bool -- ^ Just show the help
132 , optShowInsts :: Bool -- ^ Whether to show the instance map
133 , optShowNodes :: Maybe [String] -- ^ Whether to show node status
134 , optShowVer :: Bool -- ^ Just show the program version
135 , optTieredSpec :: Maybe RSpec -- ^ Requested specs for tiered mode
136 , optReplay :: Maybe String -- ^ Unittests: RNG state
137 , optVerbose :: Int -- ^ Verbosity level
140 -- | Default values for the command line options.
141 defaultOptions :: Options
142 defaultOptions = Options
143 { optDataFile = Nothing
144 , optDiskMoves = True
145 , optInstMoves = True
146 , optDiskTemplate = DTDrbd8
147 , optDynuFile = Nothing
148 , optEvacMode = False
150 , optExTags = Nothing
151 , optExecJobs = False
154 , optISpec = RSpec 1 4096 102400
158 , optMcpu = defVcpuRatio
159 , optMdsk = defReservedDiskRatio
161 , optMinGainLim = 1e-1
163 , optNoHeaders = False
168 , optSaveCluster = Nothing
169 , optShowCmds = Nothing
170 , optShowHelp = False
171 , optShowInsts = False
172 , optShowNodes = Nothing
174 , optTieredSpec = Nothing
175 , optReplay = Nothing
179 -- | Abrreviation for the option type.
180 type OptType = OptDescr (Options -> Result Options)
182 -- * Command line options
185 oDataFile = Option "t" ["text-data"]
186 (ReqArg (\ f o -> Ok o { optDataFile = Just f }) "FILE")
187 "the cluster data FILE"
189 oDiskMoves :: OptType
190 oDiskMoves = Option "" ["no-disk-moves"]
191 (NoArg (\ opts -> Ok opts { optDiskMoves = False}))
192 "disallow disk moves from the list of allowed instance changes,\
193 \ thus allowing only the 'cheap' failover/migrate operations"
195 oDiskTemplate :: OptType
196 oDiskTemplate = Option "" ["disk-template"]
197 (ReqArg (\ t opts -> do
199 return $ opts { optDiskTemplate = dt }) "TEMPLATE")
200 "select the desired disk template"
203 oSelInst = Option "" ["select-instances"]
204 (ReqArg (\ f opts -> Ok opts { optSelInst = sepSplit ',' f }) "INSTS")
205 "only select given instances for any moves"
207 oInstMoves :: OptType
208 oInstMoves = Option "" ["no-instance-moves"]
209 (NoArg (\ opts -> Ok opts { optInstMoves = False}))
210 "disallow instance (primary node) moves from the list of allowed,\
211 \ instance changes, thus allowing only slower, but sometimes\
212 \ safer, drbd secondary changes"
215 oDynuFile = Option "U" ["dynu-file"]
216 (ReqArg (\ f opts -> Ok opts { optDynuFile = Just f }) "FILE")
217 "Import dynamic utilisation data from the given FILE"
220 oEvacMode = Option "E" ["evac-mode"]
221 (NoArg (\opts -> Ok opts { optEvacMode = True }))
222 "enable evacuation mode, where the algorithm only moves \
223 \ instances away from offline and drained nodes"
226 oExInst = Option "" ["exclude-instances"]
227 (ReqArg (\ f opts -> Ok opts { optExInst = sepSplit ',' f }) "INSTS")
228 "exclude given instances from any moves"
231 oExTags = Option "" ["exclusion-tags"]
232 (ReqArg (\ f opts -> Ok opts { optExTags = Just $ sepSplit ',' f })
233 "TAG,...") "Enable instance exclusion based on given tag prefix"
236 oExecJobs = Option "X" ["exec"]
237 (NoArg (\ opts -> Ok opts { optExecJobs = True}))
238 "execute the suggested moves via Luxi (only available when using\
239 \ it for data gathering)"
242 oGroup = Option "G" ["group"]
243 (ReqArg (\ f o -> Ok o { optGroup = Just f }) "ID")
244 "the ID of the group to balance"
247 oIDisk = Option "" ["disk"]
248 (ReqArg (\ d opts -> do
249 dsk <- annotateResult ("--disk option") (parseUnit d)
250 let ospec = optISpec opts
251 nspec = ospec { rspecDsk = dsk }
252 return $ opts { optISpec = nspec }) "DISK")
253 "disk size for instances"
256 oIMem = Option "" ["memory"]
257 (ReqArg (\ m opts -> do
258 mem <- annotateResult ("--memory option") (parseUnit m)
259 let ospec = optISpec opts
260 nspec = ospec { rspecMem = mem }
261 return $ opts { optISpec = nspec }) "MEMORY")
262 "memory size for instances"
265 oIVcpus = Option "" ["vcpus"]
266 (ReqArg (\ p opts -> do
267 vcpus <- tryRead "--vcpus option" p
268 let ospec = optISpec opts
269 nspec = ospec { rspecCpu = vcpus }
270 return $ opts { optISpec = nspec }) "NUM")
271 "number of virtual cpus for instances"
273 oLuxiSocket :: OptType
274 oLuxiSocket = Option "L" ["luxi"]
275 (OptArg ((\ f opts -> Ok opts { optLuxi = Just f }) .
276 fromMaybe defaultLuxiSocket) "SOCKET")
277 "collect data via Luxi, optionally using the given SOCKET path"
280 oMaxCpu = Option "" ["max-cpu"]
281 (ReqArg (\ n opts -> Ok opts { optMcpu = read n }) "RATIO")
282 "maximum virtual-to-physical cpu ratio for nodes (from 1\
285 oMaxSolLength :: OptType
286 oMaxSolLength = Option "l" ["max-length"]
287 (ReqArg (\ i opts -> Ok opts { optMaxLength = read i }) "N")
288 "cap the solution at this many moves (useful for very\
289 \ unbalanced clusters)"
292 oMinDisk = Option "" ["min-disk"]
293 (ReqArg (\ n opts -> Ok opts { optMdsk = read n }) "RATIO")
294 "minimum free disk space for nodes (between 0 and 1) [0]"
297 oMinGain = Option "g" ["min-gain"]
298 (ReqArg (\ g opts -> Ok opts { optMinGain = read g }) "DELTA")
299 "minimum gain to aim for in a balancing step before giving up"
301 oMinGainLim :: OptType
302 oMinGainLim = Option "" ["min-gain-limit"]
303 (ReqArg (\ g opts -> Ok opts { optMinGainLim = read g }) "SCORE")
304 "minimum cluster score for which we start checking the min-gain"
307 oMinScore = Option "e" ["min-score"]
308 (ReqArg (\ e opts -> Ok opts { optMinScore = read e }) "EPSILON")
309 "mininum score to aim for"
311 oNoHeaders :: OptType
312 oNoHeaders = Option "" ["no-headers"]
313 (NoArg (\ opts -> Ok opts { optNoHeaders = True }))
314 "do not show a header line"
317 oNodeSim = Option "" ["simulate"]
318 (ReqArg (\ f o -> Ok o { optNodeSim = f:optNodeSim o }) "SPEC")
319 "simulate an empty cluster, given as 'num_nodes,disk,ram,cpu'"
321 oOfflineNode :: OptType
322 oOfflineNode = Option "O" ["offline"]
323 (ReqArg (\ n o -> Ok o { optOffline = n:optOffline o }) "NODE")
324 "set node as offline"
327 oOneline = Option "o" ["oneline"]
328 (NoArg (\ opts -> Ok opts { optOneline = True }))
329 "print the ganeti command list for reaching the solution"
331 oOutputDir :: OptType
332 oOutputDir = Option "d" ["output-dir"]
333 (ReqArg (\ d opts -> Ok opts { optOutPath = d }) "PATH")
334 "directory in which to write output files"
336 oPrintCommands :: OptType
337 oPrintCommands = Option "C" ["print-commands"]
338 (OptArg ((\ f opts -> Ok opts { optShowCmds = Just f }) .
341 "print the ganeti command list for reaching the solution,\
342 \ if an argument is passed then write the commands to a\
343 \ file named as such"
345 oPrintInsts :: OptType
346 oPrintInsts = Option "" ["print-instances"]
347 (NoArg (\ opts -> Ok opts { optShowInsts = True }))
348 "print the final instance map"
350 oPrintNodes :: OptType
351 oPrintNodes = Option "p" ["print-nodes"]
352 (OptArg ((\ f opts ->
353 let (prefix, realf) = case f of
354 '+':rest -> (["+"], rest)
356 splitted = prefix ++ sepSplit ',' realf
357 in Ok opts { optShowNodes = Just splitted }) .
358 fromMaybe []) "FIELDS")
359 "print the final node list"
362 oQuiet = Option "q" ["quiet"]
363 (NoArg (\ opts -> Ok opts { optVerbose = optVerbose opts - 1 }))
364 "decrease the verbosity level"
366 oRapiMaster :: OptType
367 oRapiMaster = Option "m" ["master"]
368 (ReqArg (\ m opts -> Ok opts { optMaster = m }) "ADDRESS")
369 "collect data via RAPI at the given ADDRESS"
371 oSaveCluster :: OptType
372 oSaveCluster = Option "S" ["save"]
373 (ReqArg (\ f opts -> Ok opts { optSaveCluster = Just f }) "FILE")
374 "Save cluster state at the end of the processing to FILE"
377 oShowHelp = Option "h" ["help"]
378 (NoArg (\ opts -> Ok opts { optShowHelp = True}))
382 oShowVer = Option "V" ["version"]
383 (NoArg (\ opts -> Ok opts { optShowVer = True}))
384 "show the version of the program"
386 oTieredSpec :: OptType
387 oTieredSpec = Option "" ["tiered-alloc"]
388 (ReqArg (\ inp opts -> do
389 let sp = sepSplit ',' inp
390 prs <- mapM (\(fn, val) -> fn val) $
391 zip [ annotateResult "tiered specs memory" .
393 , annotateResult "tiered specs disk" .
395 , tryRead "tiered specs cpus"
399 [dsk, ram, cpu] -> return $ RSpec cpu ram dsk
400 _ -> Bad $ "Invalid specification: " ++ inp ++
401 ", expected disk,ram,cpu"
402 return $ opts { optTieredSpec = Just tspec } )
404 "enable tiered specs allocation, given as 'disk,ram,cpu'"
407 oReplay = Option "" ["replay"]
408 (ReqArg (\ stat opts -> Ok opts { optReplay = Just stat } ) "STATE")
409 "Pre-seed the random number generator with STATE"
412 oVerbose = Option "v" ["verbose"]
413 (NoArg (\ opts -> Ok opts { optVerbose = optVerbose opts + 1 }))
414 "increase the verbosity level"
419 usageHelp :: String -> [OptType] -> String
421 usageInfo (printf "%s %s\nUsage: %s [OPTION...]"
422 progname Version.version progname)
424 -- | Command line parser, using the 'Options' structure.
425 parseOpts :: [String] -- ^ The command line arguments
426 -> String -- ^ The program name
427 -> [OptType] -- ^ The supported command line options
428 -> IO (Options, [String]) -- ^ The resulting options and leftover
430 parseOpts argv progname options =
431 case getOpt Permute options argv of
434 let (pr, args) = (foldM (flip id) defaultOptions o, n)
437 hPutStrLn stderr "Error while parsing command\
440 exitWith $ ExitFailure 1
441 Ok val -> return val)
442 when (optShowHelp po) $ do
443 putStr $ usageHelp progname options
445 when (optShowVer po) $ do
446 printf "%s %s\ncompiled with %s %s\nrunning on %s %s\n"
447 progname Version.version
448 compilerName (Data.Version.showVersion compilerVersion)
453 hPutStrLn stderr $ "Command line error: " ++ concat errs
454 hPutStrLn stderr $ usageHelp progname options
455 exitWith $ ExitFailure 2
457 -- | A shell script template for autogenerated scripts.
460 printf "#!/bin/sh\n\n\
461 \# Auto-generated script for executing cluster rebalancing\n\n\
462 \# To stop, touch the file /tmp/stop-htools\n\n\
465 \ if [ -f /tmp/stop-htools ]; then\n\
466 \ echo 'Stop requested, exiting'\n\
471 -- | Optionally print the node list.
472 maybePrintNodes :: Maybe [String] -- ^ The field list
473 -> String -- ^ Informational message
474 -> ([String] -> String) -- ^ Function to generate the listing
476 maybePrintNodes Nothing _ _ = return ()
477 maybePrintNodes (Just fields) msg fn = do
479 hPutStrLn stderr (msg ++ " status:")
480 hPutStrLn stderr $ fn fields
483 -- | Optionally print the instance list.
484 maybePrintInsts :: Bool -- ^ Whether to print the instance list
485 -> String -- ^ Type of the instance map (e.g. initial)
486 -> String -- ^ The instance data
488 maybePrintInsts do_print msg instdata =
491 hPutStrLn stderr $ msg ++ " instance map:"
492 hPutStr stderr instdata