root / htools / Ganeti / HTools / Text.hs @ 28f19313
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1 | 040afc35 | Iustin Pop | {-| Parsing data from text-files |
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2 | 040afc35 | Iustin Pop | |
3 | 040afc35 | Iustin Pop | This module holds the code for loading the cluster state from text |
4 | a8946537 | Iustin Pop | files, as produced by gnt-node and gnt-instance list. |
5 | 040afc35 | Iustin Pop | |
6 | 040afc35 | Iustin Pop | -} |
7 | 040afc35 | Iustin Pop | |
8 | e2fa2baf | Iustin Pop | {- |
9 | e2fa2baf | Iustin Pop | |
10 | d5072e4c | Iustin Pop | Copyright (C) 2009, 2010, 2011 Google Inc. |
11 | e2fa2baf | Iustin Pop | |
12 | e2fa2baf | Iustin Pop | This program is free software; you can redistribute it and/or modify |
13 | e2fa2baf | Iustin Pop | it under the terms of the GNU General Public License as published by |
14 | e2fa2baf | Iustin Pop | the Free Software Foundation; either version 2 of the License, or |
15 | e2fa2baf | Iustin Pop | (at your option) any later version. |
16 | e2fa2baf | Iustin Pop | |
17 | e2fa2baf | Iustin Pop | This program is distributed in the hope that it will be useful, but |
18 | e2fa2baf | Iustin Pop | WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | e2fa2baf | Iustin Pop | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
20 | e2fa2baf | Iustin Pop | General Public License for more details. |
21 | e2fa2baf | Iustin Pop | |
22 | e2fa2baf | Iustin Pop | You should have received a copy of the GNU General Public License |
23 | e2fa2baf | Iustin Pop | along with this program; if not, write to the Free Software |
24 | e2fa2baf | Iustin Pop | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
25 | e2fa2baf | Iustin Pop | 02110-1301, USA. |
26 | e2fa2baf | Iustin Pop | |
27 | e2fa2baf | Iustin Pop | -} |
28 | e2fa2baf | Iustin Pop | |
29 | 040afc35 | Iustin Pop | module Ganeti.HTools.Text |
30 | b2278348 | Iustin Pop | ( |
31 | b2278348 | Iustin Pop | loadData |
32 | dadfc261 | Iustin Pop | , parseData |
33 | 1ae7a904 | Iustin Pop | , loadInst |
34 | 39d11971 | Iustin Pop | , loadNode |
35 | 3bf75b7d | Iustin Pop | , serializeInstances |
36 | 50811e2c | Iustin Pop | , serializeNode |
37 | 3bf75b7d | Iustin Pop | , serializeNodes |
38 | 4a273e97 | Iustin Pop | , serializeCluster |
39 | b2278348 | Iustin Pop | ) where |
40 | 040afc35 | Iustin Pop | |
41 | 040afc35 | Iustin Pop | import Control.Monad |
42 | 3bf75b7d | Iustin Pop | import Data.List |
43 | 3bf75b7d | Iustin Pop | |
44 | 3bf75b7d | Iustin Pop | import Text.Printf (printf) |
45 | 040afc35 | Iustin Pop | |
46 | 040afc35 | Iustin Pop | import Ganeti.HTools.Utils |
47 | 040afc35 | Iustin Pop | import Ganeti.HTools.Loader |
48 | e4c5beaf | Iustin Pop | import Ganeti.HTools.Types |
49 | 3bf75b7d | Iustin Pop | import qualified Ganeti.HTools.Container as Container |
50 | a679e9dc | Iustin Pop | import qualified Ganeti.HTools.Group as Group |
51 | 040afc35 | Iustin Pop | import qualified Ganeti.HTools.Node as Node |
52 | 040afc35 | Iustin Pop | import qualified Ganeti.HTools.Instance as Instance |
53 | 040afc35 | Iustin Pop | |
54 | e4d8071d | Iustin Pop | -- | Serialize a single group |
55 | e4d8071d | Iustin Pop | serializeGroup :: Group.Group -> String |
56 | e4d8071d | Iustin Pop | serializeGroup grp = |
57 | f4c7d37a | Iustin Pop | printf "%s|%s|%s" (Group.name grp) (Group.uuid grp) |
58 | f4c7d37a | Iustin Pop | (apolToString (Group.allocPolicy grp)) |
59 | e4d8071d | Iustin Pop | |
60 | e4d8071d | Iustin Pop | -- | Generate group file data from a group list |
61 | e4d8071d | Iustin Pop | serializeGroups :: Group.List -> String |
62 | e4d8071d | Iustin Pop | serializeGroups = unlines . map serializeGroup . Container.elems |
63 | e4d8071d | Iustin Pop | |
64 | 3bf75b7d | Iustin Pop | -- | Serialize a single node |
65 | 10ef6b4e | Iustin Pop | serializeNode :: Group.List -> Node.Node -> String |
66 | 10ef6b4e | Iustin Pop | serializeNode gl node = |
67 | b3707354 | Iustin Pop | printf "%s|%.0f|%d|%d|%.0f|%d|%.0f|%c|%s" (Node.name node) |
68 | 3bf75b7d | Iustin Pop | (Node.tMem node) (Node.nMem node) (Node.fMem node) |
69 | 3bf75b7d | Iustin Pop | (Node.tDsk node) (Node.fDsk node) (Node.tCpu node) |
70 | 3bf75b7d | Iustin Pop | (if Node.offline node then 'Y' else 'N') |
71 | 10ef6b4e | Iustin Pop | (Group.uuid grp) |
72 | 10ef6b4e | Iustin Pop | where grp = Container.find (Node.group node) gl |
73 | 3bf75b7d | Iustin Pop | |
74 | 3bf75b7d | Iustin Pop | -- | Generate node file data from node objects |
75 | 10ef6b4e | Iustin Pop | serializeNodes :: Group.List -> Node.List -> String |
76 | 10ef6b4e | Iustin Pop | serializeNodes gl = unlines . map (serializeNode gl) . Container.elems |
77 | 3bf75b7d | Iustin Pop | |
78 | 3bf75b7d | Iustin Pop | -- | Serialize a single instance |
79 | 3bf75b7d | Iustin Pop | serializeInstance :: Node.List -> Instance.Instance -> String |
80 | 3bf75b7d | Iustin Pop | serializeInstance nl inst = |
81 | 3bf75b7d | Iustin Pop | let |
82 | 3bf75b7d | Iustin Pop | iname = Instance.name inst |
83 | 3bf75b7d | Iustin Pop | pnode = Container.nameOf nl (Instance.pNode inst) |
84 | 3bf75b7d | Iustin Pop | sidx = Instance.sNode inst |
85 | 3bf75b7d | Iustin Pop | snode = (if sidx == Node.noSecondary |
86 | 3bf75b7d | Iustin Pop | then "" |
87 | 3bf75b7d | Iustin Pop | else Container.nameOf nl sidx) |
88 | 3bf75b7d | Iustin Pop | in |
89 | bc782180 | Iustin Pop | printf "%s|%d|%d|%d|%s|%s|%s|%s|%s" |
90 | 3bf75b7d | Iustin Pop | iname (Instance.mem inst) (Instance.dsk inst) |
91 | 3bf75b7d | Iustin Pop | (Instance.vcpus inst) (Instance.runSt inst) |
92 | bc782180 | Iustin Pop | (if Instance.auto_balance inst then "Y" else "N") |
93 | 3bf75b7d | Iustin Pop | pnode snode (intercalate "," (Instance.tags inst)) |
94 | 3bf75b7d | Iustin Pop | |
95 | 3bf75b7d | Iustin Pop | -- | Generate instance file data from instance objects |
96 | 3bf75b7d | Iustin Pop | serializeInstances :: Node.List -> Instance.List -> String |
97 | 3bf75b7d | Iustin Pop | serializeInstances nl = |
98 | 3bf75b7d | Iustin Pop | unlines . map (serializeInstance nl) . Container.elems |
99 | 3bf75b7d | Iustin Pop | |
100 | 4a273e97 | Iustin Pop | -- | Generate complete cluster data from node and instance lists |
101 | c0e31451 | Iustin Pop | serializeCluster :: ClusterData -> String |
102 | c0e31451 | Iustin Pop | serializeCluster (ClusterData gl nl il ctags) = |
103 | e4d8071d | Iustin Pop | let gdata = serializeGroups gl |
104 | e4d8071d | Iustin Pop | ndata = serializeNodes gl nl |
105 | 4a273e97 | Iustin Pop | idata = serializeInstances nl il |
106 | 716c6be5 | Iustin Pop | -- note: not using 'unlines' as that adds too many newlines |
107 | 716c6be5 | Iustin Pop | in intercalate "\n" [gdata, ndata, idata, unlines ctags] |
108 | 4a273e97 | Iustin Pop | |
109 | a679e9dc | Iustin Pop | -- | Load a group from a field list. |
110 | a679e9dc | Iustin Pop | loadGroup :: (Monad m) => [String] -> m (String, Group.Group) |
111 | f4c7d37a | Iustin Pop | loadGroup [name, gid, apol] = do |
112 | f4c7d37a | Iustin Pop | xapol <- apolFromString apol |
113 | d5072e4c | Iustin Pop | return (gid, Group.create name gid xapol) |
114 | a679e9dc | Iustin Pop | |
115 | a679e9dc | Iustin Pop | loadGroup s = fail $ "Invalid/incomplete group data: '" ++ show s ++ "'" |
116 | a679e9dc | Iustin Pop | |
117 | 9188aeef | Iustin Pop | -- | Load a node from a field list. |
118 | 10ef6b4e | Iustin Pop | loadNode :: (Monad m) => NameAssoc -> [String] -> m (String, Node.Node) |
119 | 10ef6b4e | Iustin Pop | loadNode ktg [name, tm, nm, fm, td, fd, tc, fo, gu] = do |
120 | 10ef6b4e | Iustin Pop | gdx <- lookupGroup ktg name gu |
121 | 040afc35 | Iustin Pop | new_node <- |
122 | 1a82215d | Iustin Pop | if any (== "?") [tm,nm,fm,td,fd,tc] || fo == "Y" then |
123 | 10ef6b4e | Iustin Pop | return $ Node.create name 0 0 0 0 0 0 True gdx |
124 | 040afc35 | Iustin Pop | else do |
125 | 040afc35 | Iustin Pop | vtm <- tryRead name tm |
126 | 040afc35 | Iustin Pop | vnm <- tryRead name nm |
127 | 040afc35 | Iustin Pop | vfm <- tryRead name fm |
128 | 040afc35 | Iustin Pop | vtd <- tryRead name td |
129 | 040afc35 | Iustin Pop | vfd <- tryRead name fd |
130 | 1a82215d | Iustin Pop | vtc <- tryRead name tc |
131 | 10ef6b4e | Iustin Pop | return $ Node.create name vtm vnm vfm vtd vfd vtc False gdx |
132 | 040afc35 | Iustin Pop | return (name, new_node) |
133 | 10ef6b4e | Iustin Pop | loadNode _ s = fail $ "Invalid/incomplete node data: '" ++ show s ++ "'" |
134 | 040afc35 | Iustin Pop | |
135 | 9188aeef | Iustin Pop | -- | Load an instance from a field list. |
136 | 040afc35 | Iustin Pop | loadInst :: (Monad m) => |
137 | 6ff78049 | Iustin Pop | NameAssoc -> [String] -> m (String, Instance.Instance) |
138 | bc782180 | Iustin Pop | loadInst ktn [name, mem, dsk, vcpus, status, auto_bal, pnode, snode, tags] = do |
139 | 040afc35 | Iustin Pop | pidx <- lookupNode ktn name pnode |
140 | 040afc35 | Iustin Pop | sidx <- (if null snode then return Node.noSecondary |
141 | 040afc35 | Iustin Pop | else lookupNode ktn name snode) |
142 | 040afc35 | Iustin Pop | vmem <- tryRead name mem |
143 | 040afc35 | Iustin Pop | vdsk <- tryRead name dsk |
144 | d752eb39 | Iustin Pop | vvcpus <- tryRead name vcpus |
145 | bc782180 | Iustin Pop | auto_balance <- case auto_bal of |
146 | bc782180 | Iustin Pop | "Y" -> return True |
147 | bc782180 | Iustin Pop | "N" -> return False |
148 | bc782180 | Iustin Pop | _ -> fail $ "Invalid auto_balance value '" ++ auto_bal ++ |
149 | bc782180 | Iustin Pop | "' for instance " ++ name |
150 | 040afc35 | Iustin Pop | when (sidx == pidx) $ fail $ "Instance " ++ name ++ |
151 | 040afc35 | Iustin Pop | " has same primary and secondary node - " ++ pnode |
152 | 17e7af2b | Iustin Pop | let vtags = sepSplit ',' tags |
153 | c352b0a9 | Iustin Pop | newinst = Instance.create name vmem vdsk vvcpus status vtags |
154 | bc782180 | Iustin Pop | auto_balance pidx sidx |
155 | 040afc35 | Iustin Pop | return (name, newinst) |
156 | 9f6dcdea | Iustin Pop | loadInst _ s = fail $ "Invalid/incomplete instance data: '" ++ show s ++ "'" |
157 | 040afc35 | Iustin Pop | |
158 | 9188aeef | Iustin Pop | -- | Convert newline and delimiter-separated text. |
159 | 9188aeef | Iustin Pop | -- |
160 | 9188aeef | Iustin Pop | -- This function converts a text in tabular format as generated by |
161 | 9188aeef | Iustin Pop | -- @gnt-instance list@ and @gnt-node list@ to a list of objects using |
162 | 9188aeef | Iustin Pop | -- a supplied conversion function. |
163 | 497e30a1 | Iustin Pop | loadTabular :: (Monad m, Element a) => |
164 | f5197d89 | Iustin Pop | [String] -> ([String] -> m (String, a)) |
165 | 99b63608 | Iustin Pop | -> m (NameAssoc, Container.Container a) |
166 | f5197d89 | Iustin Pop | loadTabular lines_data convert_fn = do |
167 | f5197d89 | Iustin Pop | let rows = map (sepSplit '|') lines_data |
168 | 040afc35 | Iustin Pop | kerows <- mapM convert_fn rows |
169 | 497e30a1 | Iustin Pop | return $ assignIndices kerows |
170 | 040afc35 | Iustin Pop | |
171 | dadfc261 | Iustin Pop | -- | Load the cluser data from disk. |
172 | dadfc261 | Iustin Pop | readData :: String -- ^ Path to the text file |
173 | dadfc261 | Iustin Pop | -> IO String |
174 | dadfc261 | Iustin Pop | readData = readFile |
175 | dadfc261 | Iustin Pop | |
176 | 16c2369c | Iustin Pop | -- | Builds the cluster data from text input. |
177 | dadfc261 | Iustin Pop | parseData :: String -- ^ Text data |
178 | f4f6eb0b | Iustin Pop | -> Result ClusterData |
179 | dadfc261 | Iustin Pop | parseData fdata = do |
180 | 16c2369c | Iustin Pop | let flines = lines fdata |
181 | afcd5a0b | Iustin Pop | (glines, nlines, ilines, ctags) <- |
182 | a604456d | Iustin Pop | case sepSplit "" flines of |
183 | afcd5a0b | Iustin Pop | [a, b, c, d] -> Ok (a, b, c, d) |
184 | a604456d | Iustin Pop | xs -> Bad $ printf "Invalid format of the input file: %d sections\ |
185 | afcd5a0b | Iustin Pop | \ instead of 4" (length xs) |
186 | a679e9dc | Iustin Pop | {- group file: name uuid -} |
187 | 10ef6b4e | Iustin Pop | (ktg, gl) <- loadTabular glines loadGroup |
188 | dadfc261 | Iustin Pop | {- node file: name t_mem n_mem f_mem t_disk f_disk -} |
189 | a604456d | Iustin Pop | (ktn, nl) <- loadTabular nlines (loadNode ktg) |
190 | dadfc261 | Iustin Pop | {- instance file: name mem disk status pnode snode -} |
191 | a604456d | Iustin Pop | (_, il) <- loadTabular ilines (loadInst ktn) |
192 | afcd5a0b | Iustin Pop | {- the tags are simply line-based, no processing needed -} |
193 | f4f6eb0b | Iustin Pop | return (ClusterData gl nl il ctags) |
194 | dadfc261 | Iustin Pop | |
195 | dadfc261 | Iustin Pop | -- | Top level function for data loading |
196 | dadfc261 | Iustin Pop | loadData :: String -- ^ Path to the text file |
197 | f4f6eb0b | Iustin Pop | -> IO (Result ClusterData) |
198 | 2a8e2dc9 | Iustin Pop | loadData = fmap parseData . readData |