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.
10 Copyright (C) 2009, 2010 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
42 import Text.Printf (printf)
44 import Ganeti.HTools.Utils
45 import Ganeti.HTools.Loader
46 import Ganeti.HTools.Types
47 import qualified Ganeti.HTools.Container as Container
48 import qualified Ganeti.HTools.Node as Node
49 import qualified Ganeti.HTools.Instance as Instance
51 -- | Serialize a single node
52 serializeNode :: Node.Node -> String
54 printf "%s|%.0f|%d|%d|%.0f|%d|%.0f|%c" (Node.name node)
55 (Node.tMem node) (Node.nMem node) (Node.fMem node)
56 (Node.tDsk node) (Node.fDsk node) (Node.tCpu node)
57 (if Node.offline node then 'Y' else 'N')
59 -- | Generate node file data from node objects
60 serializeNodes :: Node.List -> String
61 serializeNodes = unlines . map serializeNode . Container.elems
63 -- | Serialize a single instance
64 serializeInstance :: Node.List -> Instance.Instance -> String
65 serializeInstance nl inst =
67 iname = Instance.name inst
68 pnode = Container.nameOf nl (Instance.pNode inst)
69 sidx = Instance.sNode inst
70 snode = (if sidx == Node.noSecondary
72 else Container.nameOf nl sidx)
74 printf "%s|%d|%d|%d|%s|%s|%s|%s"
75 iname (Instance.mem inst) (Instance.dsk inst)
76 (Instance.vcpus inst) (Instance.runSt inst)
77 pnode snode (intercalate "," (Instance.tags inst))
79 -- | Generate instance file data from instance objects
80 serializeInstances :: Node.List -> Instance.List -> String
81 serializeInstances nl =
82 unlines . map (serializeInstance nl) . Container.elems
84 -- | Load a node from a field list.
85 loadNode :: (Monad m) => [String] -> m (String, Node.Node)
86 loadNode [name, tm, nm, fm, td, fd, tc, fo] = do
88 if any (== "?") [tm,nm,fm,td,fd,tc] || fo == "Y" then
89 return $ Node.create name 0 0 0 0 0 0 True
91 vtm <- tryRead name tm
92 vnm <- tryRead name nm
93 vfm <- tryRead name fm
94 vtd <- tryRead name td
95 vfd <- tryRead name fd
96 vtc <- tryRead name tc
97 return $ Node.create name vtm vnm vfm vtd vfd vtc False
98 return (name, new_node)
99 loadNode s = fail $ "Invalid/incomplete node data: '" ++ show s ++ "'"
101 -- | Load an instance from a field list.
102 loadInst :: (Monad m) =>
103 [(String, Ndx)] -> [String] -> m (String, Instance.Instance)
104 loadInst ktn [name, mem, dsk, vcpus, status, pnode, snode, tags] = do
105 pidx <- lookupNode ktn name pnode
106 sidx <- (if null snode then return Node.noSecondary
107 else lookupNode ktn name snode)
108 vmem <- tryRead name mem
109 vdsk <- tryRead name dsk
110 vvcpus <- tryRead name vcpus
111 when (sidx == pidx) $ fail $ "Instance " ++ name ++
112 " has same primary and secondary node - " ++ pnode
113 let vtags = sepSplit ',' tags
114 newinst = Instance.create name vmem vdsk vvcpus status vtags pidx sidx
115 return (name, newinst)
116 loadInst _ s = fail $ "Invalid/incomplete instance data: '" ++ show s ++ "'"
118 -- | Convert newline and delimiter-separated text.
120 -- This function converts a text in tabular format as generated by
121 -- @gnt-instance list@ and @gnt-node list@ to a list of objects using
122 -- a supplied conversion function.
123 loadTabular :: (Monad m, Element a) =>
124 [String] -> ([String] -> m (String, a))
125 -> m ([(String, Int)], [(Int, a)])
126 loadTabular lines_data convert_fn = do
127 let rows = map (sepSplit '|') lines_data
128 kerows <- mapM convert_fn rows
129 return $ assignIndices kerows
131 -- | Builds the cluster data from text input.
132 loadData :: String -- ^ Path to the text file
133 -> IO (Result (Node.AssocList, Instance.AssocList, [String]))
134 loadData afile = do -- IO monad
135 fdata <- readFile afile
136 let flines = lines fdata
137 (nlines, ilines) = break null flines
139 ifixed <- case ilines of
140 [] -> Bad "Invalid format of the input file (no instance data)"
142 {- node file: name t_mem n_mem f_mem t_disk f_disk -}
143 (ktn, nl) <- loadTabular nlines loadNode
144 {- instance file: name mem disk status pnode snode -}
145 (_, il) <- loadTabular ifixed (loadInst ktn)