1 {-| Parsing data from text-files.
3 This module holds the code for loading the cluster state from text
4 files, as produced by @gnt-node@ and @gnt-instance@ @list@ command.
10 Copyright (C) 2009, 2010, 2011, 2012, 2013 Google Inc.
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful, but
18 WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
29 module Ganeti.HTools.Backend.Text
35 , loadMultipleMinMaxISpecs
42 , serializeMultipleMinMaxISpecs
50 import Text.Printf (printf)
52 import Ganeti.BasicTypes
54 import Ganeti.HTools.Loader
55 import Ganeti.HTools.Types
56 import qualified Ganeti.HTools.Container as Container
57 import qualified Ganeti.HTools.Group as Group
58 import qualified Ganeti.HTools.Node as Node
59 import qualified Ganeti.HTools.Instance as Instance
63 -- | Simple wrapper over sepSplit
64 commaSplit :: String -> [String]
65 commaSplit = sepSplit ','
67 -- * Serialisation functions
69 -- | Serialize a single group.
70 serializeGroup :: Group.Group -> String
72 printf "%s|%s|%s|%s|%s" (Group.name grp) (Group.uuid grp)
73 (allocPolicyToRaw (Group.allocPolicy grp))
74 (intercalate "," (Group.allTags grp))
75 (intercalate "," (Group.networks grp))
77 -- | Generate group file data from a group list.
78 serializeGroups :: Group.List -> String
79 serializeGroups = unlines . map serializeGroup . Container.elems
81 -- | Serialize a single node.
82 serializeNode :: Group.List -- ^ The list of groups (needed for group uuid)
83 -> Node.Node -- ^ The node to be serialised
85 serializeNode gl node =
86 printf "%s|%.0f|%d|%d|%.0f|%d|%.0f|%c|%s|%d" (Node.name node)
87 (Node.tMem node) (Node.nMem node) (Node.fMem node)
88 (Node.tDsk node) (Node.fDsk node) (Node.tCpu node)
89 (if Node.offline node then 'Y' else
90 if Node.isMaster node then 'M' else 'N')
92 (Node.spindleCount node)
93 where grp = Container.find (Node.group node) gl
95 -- | Generate node file data from node objects.
96 serializeNodes :: Group.List -> Node.List -> String
97 serializeNodes gl = unlines . map (serializeNode gl) . Container.elems
99 -- | Serialize a single instance.
100 serializeInstance :: Node.List -- ^ The node list (needed for
102 -> Instance.Instance -- ^ The instance to be serialised
104 serializeInstance nl inst =
105 let iname = Instance.name inst
106 pnode = Container.nameOf nl (Instance.pNode inst)
107 sidx = Instance.sNode inst
108 snode = (if sidx == Node.noSecondary
110 else Container.nameOf nl sidx)
111 in printf "%s|%d|%d|%d|%s|%s|%s|%s|%s|%s|%d"
112 iname (Instance.mem inst) (Instance.dsk inst)
113 (Instance.vcpus inst) (instanceStatusToRaw (Instance.runSt inst))
114 (if Instance.autoBalance inst then "Y" else "N")
115 pnode snode (diskTemplateToRaw (Instance.diskTemplate inst))
116 (intercalate "," (Instance.allTags inst)) (Instance.spindleUse inst)
118 -- | Generate instance file data from instance objects.
119 serializeInstances :: Node.List -> Instance.List -> String
120 serializeInstances nl =
121 unlines . map (serializeInstance nl) . Container.elems
123 -- | Separator between ISpecs (in MinMaxISpecs).
124 iSpecsSeparator :: Char
125 iSpecsSeparator = ';'
127 -- | Generate a spec data from a given ISpec object.
128 serializeISpec :: ISpec -> String
129 serializeISpec ispec =
130 -- this needs to be kept in sync with the object definition
131 let ISpec mem_s cpu_c disk_s disk_c nic_c su = ispec
132 strings = [show mem_s, show cpu_c, show disk_s, show disk_c, show nic_c,
134 in intercalate "," strings
136 -- | Generate disk template data.
137 serializeDiskTemplates :: [DiskTemplate] -> String
138 serializeDiskTemplates = intercalate "," . map diskTemplateToRaw
140 -- | Generate min/max instance specs data.
141 serializeMultipleMinMaxISpecs :: [MinMaxISpecs] -> String
142 serializeMultipleMinMaxISpecs minmaxes =
143 intercalate [iSpecsSeparator] $ foldr serialpair [] minmaxes
144 where serialpair (MinMaxISpecs minspec maxspec) acc =
145 serializeISpec minspec : serializeISpec maxspec : acc
147 -- | Generate policy data from a given policy object.
148 serializeIPolicy :: String -> IPolicy -> String
149 serializeIPolicy owner ipol =
150 let IPolicy minmax stdspec dts vcpu_ratio spindle_ratio = ipol
152 , serializeISpec stdspec
153 , serializeMultipleMinMaxISpecs minmax
154 , serializeDiskTemplates dts
158 in intercalate "|" strings
160 -- | Generates the entire ipolicy section from the cluster and group
162 serializeAllIPolicies :: IPolicy -> Group.List -> String
163 serializeAllIPolicies cpol gl =
164 let groups = Container.elems gl
165 allpolicies = ("", cpol) :
166 map (\g -> (Group.name g, Group.iPolicy g)) groups
167 strings = map (uncurry serializeIPolicy) allpolicies
170 -- | Generate complete cluster data from node and instance lists.
171 serializeCluster :: ClusterData -> String
172 serializeCluster (ClusterData gl nl il ctags cpol) =
173 let gdata = serializeGroups gl
174 ndata = serializeNodes gl nl
175 idata = serializeInstances nl il
176 pdata = serializeAllIPolicies cpol gl
177 -- note: not using 'unlines' as that adds too many newlines
178 in intercalate "\n" [gdata, ndata, idata, unlines ctags, pdata]
180 -- * Parsing functions
182 -- | Load a group from a field list.
183 loadGroup :: (Monad m) => [String]
184 -> m (String, Group.Group) -- ^ The result, a tuple of group
185 -- UUID and group object
186 loadGroup [name, gid, apol, tags, nets] = do
187 xapol <- allocPolicyFromRaw apol
188 let xtags = commaSplit tags
189 let xnets = commaSplit nets
190 return (gid, Group.create name gid xapol xnets defIPolicy xtags)
191 loadGroup [name, gid, apol, tags] = loadGroup [name, gid, apol, tags, ""]
192 loadGroup s = fail $ "Invalid/incomplete group data: '" ++ show s ++ "'"
194 -- | Load a node from a field list.
195 loadNode :: (Monad m) =>
196 NameAssoc -- ^ Association list with current groups
197 -> [String] -- ^ Input data as a list of fields
198 -> m (String, Node.Node) -- ^ The result, a tuple o node name
200 loadNode ktg [name, tm, nm, fm, td, fd, tc, fo, gu, spindles] = do
201 gdx <- lookupGroup ktg name gu
203 if "?" `elem` [tm,nm,fm,td,fd,tc] || fo == "Y" then
204 return $ Node.create name 0 0 0 0 0 0 True 0 gdx
206 vtm <- tryRead name tm
207 vnm <- tryRead name nm
208 vfm <- tryRead name fm
209 vtd <- tryRead name td
210 vfd <- tryRead name fd
211 vtc <- tryRead name tc
212 vspindles <- tryRead name spindles
213 return . flip Node.setMaster (fo == "M") $
214 Node.create name vtm vnm vfm vtd vfd vtc False vspindles gdx
215 return (name, new_node)
217 loadNode ktg [name, tm, nm, fm, td, fd, tc, fo, gu] =
218 loadNode ktg [name, tm, nm, fm, td, fd, tc, fo, gu, "1"]
220 loadNode _ s = fail $ "Invalid/incomplete node data: '" ++ show s ++ "'"
222 -- | Load an instance from a field list.
223 loadInst :: NameAssoc -- ^ Association list with the current nodes
224 -> [String] -- ^ Input data as a list of fields
225 -> Result (String, Instance.Instance) -- ^ A tuple of
227 -- the instance object
228 loadInst ktn [ name, mem, dsk, vcpus, status, auto_bal, pnode, snode
229 , dt, tags, su ] = do
230 pidx <- lookupNode ktn name pnode
231 sidx <- if null snode
232 then return Node.noSecondary
233 else lookupNode ktn name snode
234 vmem <- tryRead name mem
235 vdsk <- tryRead name dsk
236 vvcpus <- tryRead name vcpus
237 vstatus <- instanceStatusFromRaw status
238 auto_balance <- case auto_bal of
241 _ -> fail $ "Invalid auto_balance value '" ++ auto_bal ++
242 "' for instance " ++ name
243 disk_template <- annotateResult ("Instance " ++ name)
244 (diskTemplateFromRaw dt)
245 spindle_use <- tryRead name su
246 when (sidx == pidx) . fail $ "Instance " ++ name ++
247 " has same primary and secondary node - " ++ pnode
248 let vtags = commaSplit tags
249 newinst = Instance.create name vmem vdsk [vdsk] vvcpus vstatus vtags
250 auto_balance pidx sidx disk_template spindle_use []
251 return (name, newinst)
253 loadInst ktn [ name, mem, dsk, vcpus, status, auto_bal, pnode, snode
254 , dt, tags ] = loadInst ktn [ name, mem, dsk, vcpus, status,
255 auto_bal, pnode, snode, dt, tags,
257 loadInst _ s = fail $ "Invalid/incomplete instance data: '" ++ show s ++ "'"
259 -- | Loads a spec from a field list.
260 loadISpec :: String -> [String] -> Result ISpec
261 loadISpec owner [mem_s, cpu_c, dsk_s, dsk_c, nic_c, su] = do
262 xmem_s <- tryRead (owner ++ "/memsize") mem_s
263 xcpu_c <- tryRead (owner ++ "/cpucount") cpu_c
264 xdsk_s <- tryRead (owner ++ "/disksize") dsk_s
265 xdsk_c <- tryRead (owner ++ "/diskcount") dsk_c
266 xnic_c <- tryRead (owner ++ "/niccount") nic_c
267 xsu <- tryRead (owner ++ "/spindleuse") su
268 return $ ISpec xmem_s xcpu_c xdsk_s xdsk_c xnic_c xsu
269 loadISpec owner s = fail $ "Invalid ispec data for " ++ owner ++ ": " ++ show s
271 -- | Load a single min/max ISpec pair
272 loadMinMaxISpecs :: String -> String -> String -> Result MinMaxISpecs
273 loadMinMaxISpecs owner minspec maxspec = do
274 xminspec <- loadISpec (owner ++ "/minspec") (commaSplit minspec)
275 xmaxspec <- loadISpec (owner ++ "/maxspec") (commaSplit maxspec)
276 return $ MinMaxISpecs xminspec xmaxspec
278 -- | Break a list of ispecs strings into a list of (min/max) ispecs pairs
279 breakISpecsPairs :: String -> [String] -> Result [(String, String)]
280 breakISpecsPairs _ [] =
282 breakISpecsPairs owner (x:y:xs) = do
283 rest <- breakISpecsPairs owner xs
284 return $ (x, y) : rest
285 breakISpecsPairs owner _ =
286 fail $ "Odd number of min/max specs for " ++ owner
288 -- | Load a list of min/max ispecs pairs
289 loadMultipleMinMaxISpecs :: String -> [String] -> Result [MinMaxISpecs]
290 loadMultipleMinMaxISpecs owner ispecs = do
291 pairs <- breakISpecsPairs owner ispecs
292 mapM (uncurry $ loadMinMaxISpecs owner) pairs
294 -- | Loads an ipolicy from a field list.
295 loadIPolicy :: [String] -> Result (String, IPolicy)
296 loadIPolicy [owner, stdspec, minmaxspecs, dtemplates,
297 vcpu_ratio, spindle_ratio] = do
298 xstdspec <- loadISpec (owner ++ "/stdspec") (commaSplit stdspec)
299 xminmaxspecs <- loadMultipleMinMaxISpecs owner $
300 sepSplit iSpecsSeparator minmaxspecs
301 xdts <- mapM diskTemplateFromRaw $ commaSplit dtemplates
302 xvcpu_ratio <- tryRead (owner ++ "/vcpu_ratio") vcpu_ratio
303 xspindle_ratio <- tryRead (owner ++ "/spindle_ratio") spindle_ratio
305 IPolicy xminmaxspecs xstdspec
306 xdts xvcpu_ratio xspindle_ratio)
307 loadIPolicy s = fail $ "Invalid ipolicy data: '" ++ show s ++ "'"
309 loadOnePolicy :: (IPolicy, Group.List) -> String
310 -> Result (IPolicy, Group.List)
311 loadOnePolicy (cpol, gl) line = do
312 (owner, ipol) <- loadIPolicy (sepSplit '|' line)
314 "" -> return (ipol, gl) -- this is a cluster policy (no owner)
316 grp <- Container.findByName gl owner
317 let grp' = grp { Group.iPolicy = ipol }
318 gl' = Container.add (Group.idx grp') grp' gl
321 -- | Loads all policies from the policy section
322 loadAllIPolicies :: Group.List -> [String] -> Result (IPolicy, Group.List)
323 loadAllIPolicies gl =
324 foldM loadOnePolicy (defIPolicy, gl)
326 -- | Convert newline and delimiter-separated text.
328 -- This function converts a text in tabular format as generated by
329 -- @gnt-instance list@ and @gnt-node list@ to a list of objects using
330 -- a supplied conversion function.
331 loadTabular :: (Monad m, Element a) =>
332 [String] -- ^ Input data, as a list of lines
333 -> ([String] -> m (String, a)) -- ^ Conversion function
335 , Container.Container a ) -- ^ A tuple of an
336 -- association list (name
337 -- to object) and a set as
339 -- "Ganeti.HTools.Container"
341 loadTabular lines_data convert_fn = do
342 let rows = map (sepSplit '|') lines_data
343 kerows <- mapM convert_fn rows
344 return $ assignIndices kerows
346 -- | Load the cluser data from disk.
348 -- This is an alias to 'readFile' just for consistency with the other
350 readData :: String -- ^ Path to the text file
351 -> IO String -- ^ Contents of the file
354 -- | Builds the cluster data from text input.
355 parseData :: String -- ^ Text data
356 -> Result ClusterData
358 let flines = lines fdata
359 (glines, nlines, ilines, ctags, pollines) <-
360 case sepSplit "" flines of
361 [a, b, c, d, e] -> Ok (a, b, c, d, e)
362 [a, b, c, d] -> Ok (a, b, c, d, [])
363 xs -> Bad $ printf "Invalid format of the input file: %d sections\
364 \ instead of 4 or 5" (length xs)
365 {- group file: name uuid alloc_policy -}
366 (ktg, gl) <- loadTabular glines loadGroup
367 {- node file: name t_mem n_mem f_mem t_disk f_disk t_cpu offline grp_uuid
369 (ktn, nl) <- loadTabular nlines (loadNode ktg)
370 {- instance file: name mem disk vcpus status auto_bal pnode snode
371 disk_template tags spindle_use -}
372 (_, il) <- loadTabular ilines (loadInst ktn)
373 {- the tags are simply line-based, no processing needed -}
374 {- process policies -}
375 (cpol, gl') <- loadAllIPolicies gl pollines
376 return (ClusterData gl' nl il ctags cpol)
378 -- | Top level function for data loading.
379 loadData :: String -- ^ Path to the text file
380 -> IO (Result ClusterData)
381 loadData = fmap parseData . readData