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 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.Text
48 import Text.Printf (printf)
50 import Ganeti.HTools.Utils
51 import Ganeti.HTools.Loader
52 import Ganeti.HTools.Types
53 import qualified Ganeti.HTools.Container as Container
54 import qualified Ganeti.HTools.Group as Group
55 import qualified Ganeti.HTools.Node as Node
56 import qualified Ganeti.HTools.Instance as Instance
60 -- | Simple wrapper over sepSplit
61 commaSplit :: String -> [String]
62 commaSplit = sepSplit ','
64 -- * Serialisation functions
66 -- | Serialize a single group.
67 serializeGroup :: Group.Group -> String
69 printf "%s|%s|%s" (Group.name grp) (Group.uuid grp)
70 (allocPolicyToRaw (Group.allocPolicy grp))
72 -- | Generate group file data from a group list.
73 serializeGroups :: Group.List -> String
74 serializeGroups = unlines . map serializeGroup . Container.elems
76 -- | Serialize a single node.
77 serializeNode :: Group.List -- ^ The list of groups (needed for group uuid)
78 -> Node.Node -- ^ The node to be serialised
80 serializeNode gl node =
81 printf "%s|%.0f|%d|%d|%.0f|%d|%.0f|%c|%s|%d" (Node.name node)
82 (Node.tMem node) (Node.nMem node) (Node.fMem node)
83 (Node.tDsk node) (Node.fDsk node) (Node.tCpu node)
84 (if Node.offline node then 'Y' else 'N')
86 (Node.spindleCount node)
87 where grp = Container.find (Node.group node) gl
89 -- | Generate node file data from node objects.
90 serializeNodes :: Group.List -> Node.List -> String
91 serializeNodes gl = unlines . map (serializeNode gl) . Container.elems
93 -- | Serialize a single instance.
94 serializeInstance :: Node.List -- ^ The node list (needed for
96 -> Instance.Instance -- ^ The instance to be serialised
98 serializeInstance nl inst =
99 let iname = Instance.name inst
100 pnode = Container.nameOf nl (Instance.pNode inst)
101 sidx = Instance.sNode inst
102 snode = (if sidx == Node.noSecondary
104 else Container.nameOf nl sidx)
105 in printf "%s|%d|%d|%d|%s|%s|%s|%s|%s|%s"
106 iname (Instance.mem inst) (Instance.dsk inst)
107 (Instance.vcpus inst) (instanceStatusToRaw (Instance.runSt inst))
108 (if Instance.autoBalance inst then "Y" else "N")
109 pnode snode (diskTemplateToRaw (Instance.diskTemplate inst))
110 (intercalate "," (Instance.tags inst))
112 -- | Generate instance file data from instance objects.
113 serializeInstances :: Node.List -> Instance.List -> String
114 serializeInstances nl =
115 unlines . map (serializeInstance nl) . Container.elems
117 -- | Generate a spec data from a given ISpec object.
118 serializeISpec :: ISpec -> String
119 serializeISpec ispec =
120 -- this needs to be kept in sync with the object definition
121 let ISpec mem_s cpu_c disk_s disk_c nic_c = ispec
122 strings = [show mem_s, show cpu_c, show disk_s, show disk_c, show nic_c]
123 in intercalate "," strings
125 -- | Generate disk template data.
126 serializeDiskTemplates :: [DiskTemplate] -> String
127 serializeDiskTemplates = intercalate "," . map diskTemplateToRaw
129 -- | Generate policy data from a given policy object.
130 serializeIPolicy :: String -> IPolicy -> String
131 serializeIPolicy owner ipol =
132 let IPolicy stdspec minspec maxspec dts vcpu_ratio spindle_ratio = ipol
134 , serializeISpec stdspec
135 , serializeISpec minspec
136 , serializeISpec maxspec
137 , serializeDiskTemplates dts
141 in intercalate "|" strings
143 -- | Generates the entire ipolicy section from the cluster and group
145 serializeAllIPolicies :: IPolicy -> Group.List -> String
146 serializeAllIPolicies cpol gl =
147 let groups = Container.elems gl
148 allpolicies = [("", cpol)] ++
149 map (\g -> (Group.name g, Group.iPolicy g)) groups
150 strings = map (uncurry serializeIPolicy) allpolicies
153 -- | Generate complete cluster data from node and instance lists.
154 serializeCluster :: ClusterData -> String
155 serializeCluster (ClusterData gl nl il ctags cpol) =
156 let gdata = serializeGroups gl
157 ndata = serializeNodes gl nl
158 idata = serializeInstances nl il
159 pdata = serializeAllIPolicies cpol gl
160 -- note: not using 'unlines' as that adds too many newlines
161 in intercalate "\n" [gdata, ndata, idata, unlines ctags, pdata]
163 -- * Parsing functions
165 -- | Load a group from a field list.
166 loadGroup :: (Monad m) => [String]
167 -> m (String, Group.Group) -- ^ The result, a tuple of group
168 -- UUID and group object
169 loadGroup [name, gid, apol] = do
170 xapol <- allocPolicyFromRaw apol
171 return (gid, Group.create name gid xapol defIPolicy)
173 loadGroup s = fail $ "Invalid/incomplete group data: '" ++ show s ++ "'"
175 -- | Load a node from a field list.
176 loadNode :: (Monad m) =>
177 NameAssoc -- ^ Association list with current groups
178 -> [String] -- ^ Input data as a list of fields
179 -> m (String, Node.Node) -- ^ The result, a tuple o node name
181 loadNode ktg [name, tm, nm, fm, td, fd, tc, fo, gu, spindles] = do
182 gdx <- lookupGroup ktg name gu
184 if any (== "?") [tm,nm,fm,td,fd,tc] || fo == "Y" then
185 return $ Node.create name 0 0 0 0 0 0 True 0 gdx
187 vtm <- tryRead name tm
188 vnm <- tryRead name nm
189 vfm <- tryRead name fm
190 vtd <- tryRead name td
191 vfd <- tryRead name fd
192 vtc <- tryRead name tc
193 vspindles <- tryRead name spindles
194 return $ Node.create name vtm vnm vfm vtd vfd vtc False vspindles gdx
195 return (name, new_node)
197 loadNode ktg [name, tm, nm, fm, td, fd, tc, fo, gu] =
198 loadNode ktg [name, tm, nm, fm, td, fd, tc, fo, gu, "1"]
200 loadNode _ s = fail $ "Invalid/incomplete node data: '" ++ show s ++ "'"
202 -- | Load an instance from a field list.
203 loadInst :: NameAssoc -- ^ Association list with the current nodes
204 -> [String] -- ^ Input data as a list of fields
205 -> Result (String, Instance.Instance) -- ^ A tuple of
207 -- the instance object
208 loadInst ktn [ name, mem, dsk, vcpus, status, auto_bal, pnode, snode
210 pidx <- lookupNode ktn name pnode
211 sidx <- if null snode
212 then return Node.noSecondary
213 else lookupNode ktn name snode
214 vmem <- tryRead name mem
215 vdsk <- tryRead name dsk
216 vvcpus <- tryRead name vcpus
217 vstatus <- instanceStatusFromRaw status
218 auto_balance <- case auto_bal of
221 _ -> fail $ "Invalid auto_balance value '" ++ auto_bal ++
222 "' for instance " ++ name
223 disk_template <- annotateResult ("Instance " ++ name)
224 (diskTemplateFromRaw dt)
225 when (sidx == pidx) $ fail $ "Instance " ++ name ++
226 " has same primary and secondary node - " ++ pnode
227 let vtags = commaSplit tags
228 newinst = Instance.create name vmem vdsk vvcpus vstatus vtags
229 auto_balance pidx sidx disk_template
230 return (name, newinst)
231 loadInst _ s = fail $ "Invalid/incomplete instance data: '" ++ show s ++ "'"
233 -- | Loads a spec from a field list.
234 loadISpec :: String -> [String] -> Result ISpec
235 loadISpec owner [mem_s, cpu_c, dsk_s, dsk_c, nic_c] = do
236 xmem_s <- tryRead (owner ++ "/memsize") mem_s
237 xcpu_c <- tryRead (owner ++ "/cpucount") cpu_c
238 xdsk_s <- tryRead (owner ++ "/disksize") dsk_s
239 xdsk_c <- tryRead (owner ++ "/diskcount") dsk_c
240 xnic_c <- tryRead (owner ++ "/niccount") nic_c
241 return $ ISpec xmem_s xcpu_c xdsk_s xdsk_c xnic_c
242 loadISpec owner s = fail $ "Invalid ispec data for " ++ owner ++ ": " ++ show s
244 -- | Loads an ipolicy from a field list.
245 loadIPolicy :: [String] -> Result (String, IPolicy)
246 loadIPolicy [owner, stdspec, minspec, maxspec, dtemplates,
247 vcpu_ratio, spindle_ratio] = do
248 xstdspec <- loadISpec (owner ++ "/stdspec") (commaSplit stdspec)
249 xminspec <- loadISpec (owner ++ "/minspec") (commaSplit minspec)
250 xmaxspec <- loadISpec (owner ++ "/maxspec") (commaSplit maxspec)
251 xdts <- mapM diskTemplateFromRaw $ commaSplit dtemplates
252 xvcpu_ratio <- tryRead (owner ++ "/vcpu_ratio") vcpu_ratio
253 xspindle_ratio <- tryRead (owner ++ "/spindle_ratio") spindle_ratio
254 return $ (owner, IPolicy xstdspec xminspec xmaxspec xdts
255 xvcpu_ratio xspindle_ratio)
256 loadIPolicy s = fail $ "Invalid ipolicy data: '" ++ show s ++ "'"
258 loadOnePolicy :: (IPolicy, Group.List) -> String
259 -> Result (IPolicy, Group.List)
260 loadOnePolicy (cpol, gl) line = do
261 (owner, ipol) <- loadIPolicy (sepSplit '|' line)
263 "" -> return (ipol, gl) -- this is a cluster policy (no owner)
265 grp <- Container.findByName gl owner
266 let grp' = grp { Group.iPolicy = ipol }
267 gl' = Container.add (Group.idx grp') grp' gl
270 -- | Loads all policies from the policy section
271 loadAllIPolicies :: Group.List -> [String] -> Result (IPolicy, Group.List)
272 loadAllIPolicies gl =
273 foldM loadOnePolicy (defIPolicy, gl)
275 -- | Convert newline and delimiter-separated text.
277 -- This function converts a text in tabular format as generated by
278 -- @gnt-instance list@ and @gnt-node list@ to a list of objects using
279 -- a supplied conversion function.
280 loadTabular :: (Monad m, Element a) =>
281 [String] -- ^ Input data, as a list of lines
282 -> ([String] -> m (String, a)) -- ^ Conversion function
284 , Container.Container a ) -- ^ A tuple of an
285 -- association list (name
286 -- to object) and a set as
288 -- "Ganeti.HTools.Container"
290 loadTabular lines_data convert_fn = do
291 let rows = map (sepSplit '|') lines_data
292 kerows <- mapM convert_fn rows
293 return $ assignIndices kerows
295 -- | Load the cluser data from disk.
297 -- This is an alias to 'readFile' just for consistency with the other
299 readData :: String -- ^ Path to the text file
300 -> IO String -- ^ Contents of the file
303 -- | Builds the cluster data from text input.
304 parseData :: String -- ^ Text data
305 -> Result ClusterData
307 let flines = lines fdata
308 (glines, nlines, ilines, ctags, pollines) <-
309 case sepSplit "" flines of
310 [a, b, c, d, e] -> Ok (a, b, c, d, e)
311 [a, b, c, d] -> Ok (a, b, c, d, [])
312 xs -> Bad $ printf "Invalid format of the input file: %d sections\
313 \ instead of 4 or 5" (length xs)
314 {- group file: name uuid -}
315 (ktg, gl) <- loadTabular glines loadGroup
316 {- node file: name t_mem n_mem f_mem t_disk f_disk -}
317 (ktn, nl) <- loadTabular nlines (loadNode ktg)
318 {- instance file: name mem disk status pnode snode -}
319 (_, il) <- loadTabular ilines (loadInst ktn)
320 {- the tags are simply line-based, no processing needed -}
321 {- process policies -}
322 (cpol, gl') <- loadAllIPolicies gl pollines
323 return (ClusterData gl' nl il ctags cpol)
325 -- | Top level function for data loading.
326 loadData :: String -- ^ Path to the text file
327 -> IO (Result ClusterData)
328 loadData = fmap parseData . readData