root / Ganeti / HTools / Loader.hs @ 9b1e1cc9
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1 | 040afc35 | Iustin Pop | {-| Loading data from external sources |
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2 | 040afc35 | Iustin Pop | |
3 | 040afc35 | Iustin Pop | This module holds the common code for loading the cluster state from external sources. |
4 | 040afc35 | Iustin Pop | |
5 | 040afc35 | Iustin Pop | -} |
6 | 040afc35 | Iustin Pop | |
7 | e2fa2baf | Iustin Pop | {- |
8 | e2fa2baf | Iustin Pop | |
9 | e2fa2baf | Iustin Pop | Copyright (C) 2009 Google Inc. |
10 | e2fa2baf | Iustin Pop | |
11 | e2fa2baf | Iustin Pop | This program is free software; you can redistribute it and/or modify |
12 | e2fa2baf | Iustin Pop | it under the terms of the GNU General Public License as published by |
13 | e2fa2baf | Iustin Pop | the Free Software Foundation; either version 2 of the License, or |
14 | e2fa2baf | Iustin Pop | (at your option) any later version. |
15 | e2fa2baf | Iustin Pop | |
16 | e2fa2baf | Iustin Pop | This program is distributed in the hope that it will be useful, but |
17 | e2fa2baf | Iustin Pop | WITHOUT ANY WARRANTY; without even the implied warranty of |
18 | e2fa2baf | Iustin Pop | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
19 | e2fa2baf | Iustin Pop | General Public License for more details. |
20 | e2fa2baf | Iustin Pop | |
21 | e2fa2baf | Iustin Pop | You should have received a copy of the GNU General Public License |
22 | e2fa2baf | Iustin Pop | along with this program; if not, write to the Free Software |
23 | e2fa2baf | Iustin Pop | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
24 | e2fa2baf | Iustin Pop | 02110-1301, USA. |
25 | e2fa2baf | Iustin Pop | |
26 | e2fa2baf | Iustin Pop | -} |
27 | e2fa2baf | Iustin Pop | |
28 | 040afc35 | Iustin Pop | module Ganeti.HTools.Loader |
29 | 446d8827 | Iustin Pop | ( mergeData |
30 | 446d8827 | Iustin Pop | , checkData |
31 | 446d8827 | Iustin Pop | , assignIndices |
32 | 446d8827 | Iustin Pop | , lookupNode |
33 | 5a1edeb6 | Iustin Pop | , lookupInstance |
34 | ed41c179 | Iustin Pop | , stripSuffix |
35 | 19f38ee8 | Iustin Pop | , RqType(..) |
36 | 19f38ee8 | Iustin Pop | , Request(..) |
37 | 446d8827 | Iustin Pop | ) where |
38 | 040afc35 | Iustin Pop | |
39 | e4c5beaf | Iustin Pop | import Data.List |
40 | 446d8827 | Iustin Pop | import Data.Maybe (fromJust) |
41 | 446d8827 | Iustin Pop | import Text.Printf (printf) |
42 | e4c5beaf | Iustin Pop | |
43 | e4c5beaf | Iustin Pop | import qualified Ganeti.HTools.Container as Container |
44 | e4c5beaf | Iustin Pop | import qualified Ganeti.HTools.Instance as Instance |
45 | e4c5beaf | Iustin Pop | import qualified Ganeti.HTools.Node as Node |
46 | e4c5beaf | Iustin Pop | |
47 | e4c5beaf | Iustin Pop | import Ganeti.HTools.Types |
48 | e4c5beaf | Iustin Pop | |
49 | 19f38ee8 | Iustin Pop | -- * Types |
50 | 19f38ee8 | Iustin Pop | |
51 | 19f38ee8 | Iustin Pop | {-| The request type. |
52 | 19f38ee8 | Iustin Pop | |
53 | 19f38ee8 | Iustin Pop | This type denotes what request we got from Ganeti and also holds |
54 | 19f38ee8 | Iustin Pop | request-specific fields. |
55 | 19f38ee8 | Iustin Pop | |
56 | 19f38ee8 | Iustin Pop | -} |
57 | 19f38ee8 | Iustin Pop | data RqType |
58 | 19f38ee8 | Iustin Pop | = Allocate Instance.Instance Int -- ^ A new instance allocation |
59 | 19f38ee8 | Iustin Pop | | Relocate Idx Int [Ndx] -- ^ Move an instance to a new |
60 | 19f38ee8 | Iustin Pop | -- secondary node |
61 | 19f38ee8 | Iustin Pop | deriving (Show) |
62 | 19f38ee8 | Iustin Pop | |
63 | 19f38ee8 | Iustin Pop | -- | A complete request, as received from Ganeti. |
64 | 19f38ee8 | Iustin Pop | data Request = Request RqType Node.List Instance.List String |
65 | 19f38ee8 | Iustin Pop | deriving (Show) |
66 | 19f38ee8 | Iustin Pop | |
67 | 19f38ee8 | Iustin Pop | -- * Functions |
68 | 19f38ee8 | Iustin Pop | |
69 | 9188aeef | Iustin Pop | -- | Lookups a node into an assoc list. |
70 | 608efcce | Iustin Pop | lookupNode :: (Monad m) => [(String, Ndx)] -> String -> String -> m Ndx |
71 | 040afc35 | Iustin Pop | lookupNode ktn inst node = |
72 | 040afc35 | Iustin Pop | case lookup node ktn of |
73 | 040afc35 | Iustin Pop | Nothing -> fail $ "Unknown node '" ++ node ++ "' for instance " ++ inst |
74 | 040afc35 | Iustin Pop | Just idx -> return idx |
75 | 040afc35 | Iustin Pop | |
76 | 9188aeef | Iustin Pop | -- | Lookups an instance into an assoc list. |
77 | 5a1edeb6 | Iustin Pop | lookupInstance :: (Monad m) => [(String, Idx)] -> String -> m Idx |
78 | 5a1edeb6 | Iustin Pop | lookupInstance kti inst = |
79 | 5a1edeb6 | Iustin Pop | case lookup inst kti of |
80 | 5a1edeb6 | Iustin Pop | Nothing -> fail $ "Unknown instance '" ++ inst ++ "'" |
81 | 5a1edeb6 | Iustin Pop | Just idx -> return idx |
82 | 5a1edeb6 | Iustin Pop | |
83 | 9188aeef | Iustin Pop | -- | Given a list of elements (and their names), assign indices to them. |
84 | 497e30a1 | Iustin Pop | assignIndices :: (Element a) => |
85 | 497e30a1 | Iustin Pop | [(String, a)] |
86 | 040afc35 | Iustin Pop | -> (NameAssoc, [(Int, a)]) |
87 | 497e30a1 | Iustin Pop | assignIndices = |
88 | 497e30a1 | Iustin Pop | unzip . map (\ (idx, (k, v)) -> ((k, idx), (idx, setIdx v idx))) |
89 | 040afc35 | Iustin Pop | . zip [0..] |
90 | e4c5beaf | Iustin Pop | |
91 | 9188aeef | Iustin Pop | -- | For each instance, add its index to its primary and secondary nodes. |
92 | 608efcce | Iustin Pop | fixNodes :: [(Ndx, Node.Node)] |
93 | 608efcce | Iustin Pop | -> [(Idx, Instance.Instance)] |
94 | 608efcce | Iustin Pop | -> [(Ndx, Node.Node)] |
95 | e4c5beaf | Iustin Pop | fixNodes nl il = |
96 | e4c5beaf | Iustin Pop | foldl' (\accu (idx, inst) -> |
97 | e4c5beaf | Iustin Pop | let |
98 | e4c5beaf | Iustin Pop | assocEqual = (\ (i, _) (j, _) -> i == j) |
99 | e4c5beaf | Iustin Pop | pdx = Instance.pnode inst |
100 | e4c5beaf | Iustin Pop | sdx = Instance.snode inst |
101 | e4c5beaf | Iustin Pop | pold = fromJust $ lookup pdx accu |
102 | e4c5beaf | Iustin Pop | pnew = Node.setPri pold idx |
103 | e4c5beaf | Iustin Pop | ac1 = deleteBy assocEqual (pdx, pold) accu |
104 | e4c5beaf | Iustin Pop | ac2 = (pdx, pnew):ac1 |
105 | e4c5beaf | Iustin Pop | in |
106 | e4c5beaf | Iustin Pop | if sdx /= Node.noSecondary then |
107 | e4c5beaf | Iustin Pop | let |
108 | e4c5beaf | Iustin Pop | sold = fromJust $ lookup sdx accu |
109 | e4c5beaf | Iustin Pop | snew = Node.setSec sold idx |
110 | e4c5beaf | Iustin Pop | ac3 = deleteBy assocEqual (sdx, sold) ac2 |
111 | e4c5beaf | Iustin Pop | ac4 = (sdx, snew):ac3 |
112 | e4c5beaf | Iustin Pop | in ac4 |
113 | e4c5beaf | Iustin Pop | else |
114 | e4c5beaf | Iustin Pop | ac2 |
115 | e4c5beaf | Iustin Pop | ) nl il |
116 | e4c5beaf | Iustin Pop | |
117 | f9fc7a63 | Iustin Pop | -- | Compute the longest common suffix of a list of strings that |
118 | 9188aeef | Iustin Pop | -- | starts with a dot. |
119 | 8472a321 | Iustin Pop | longestDomain :: [String] -> String |
120 | e4c5beaf | Iustin Pop | longestDomain [] = "" |
121 | 8472a321 | Iustin Pop | longestDomain (x:xs) = |
122 | 8472a321 | Iustin Pop | foldr (\ suffix accu -> if all (isSuffixOf suffix) xs |
123 | e4c5beaf | Iustin Pop | then suffix |
124 | e4c5beaf | Iustin Pop | else accu) |
125 | e4c5beaf | Iustin Pop | "" $ filter (isPrefixOf ".") (tails x) |
126 | e4c5beaf | Iustin Pop | |
127 | 9188aeef | Iustin Pop | -- | Remove tail suffix from a string. |
128 | 26b5d395 | Iustin Pop | stripSuffix :: Int -> String -> String |
129 | 26b5d395 | Iustin Pop | stripSuffix sflen name = take ((length name) - sflen) name |
130 | e4c5beaf | Iustin Pop | |
131 | 9188aeef | Iustin Pop | -- | Initializer function that loads the data from a node and instance |
132 | 9188aeef | Iustin Pop | -- list and massages it into the correct format. |
133 | e3a684c5 | Iustin Pop | mergeData :: (Node.AssocList, |
134 | e3a684c5 | Iustin Pop | Instance.AssocList) -- ^ Data from either Text.loadData |
135 | e3a684c5 | Iustin Pop | -- or Rapi.loadData |
136 | 262a08a2 | Iustin Pop | -> Result (Node.List, Instance.List, String) |
137 | e3a684c5 | Iustin Pop | mergeData (nl, il) = do |
138 | e4c5beaf | Iustin Pop | let |
139 | e4c5beaf | Iustin Pop | nl2 = fixNodes nl il |
140 | e4c5beaf | Iustin Pop | il3 = Container.fromAssocList il |
141 | e4c5beaf | Iustin Pop | nl3 = Container.fromAssocList |
142 | 9cf4267a | Iustin Pop | (map (\ (k, v) -> (k, Node.buildPeers v il3)) nl2) |
143 | 8472a321 | Iustin Pop | node_names = map Node.name $ Container.elems nl3 |
144 | 8472a321 | Iustin Pop | inst_names = map Instance.name $ Container.elems il3 |
145 | 8472a321 | Iustin Pop | common_suffix = longestDomain (node_names ++ inst_names) |
146 | 26b5d395 | Iustin Pop | csl = length common_suffix |
147 | 262a08a2 | Iustin Pop | snl = Container.map (\n -> setName n (stripSuffix csl $ nameOf n)) nl3 |
148 | 262a08a2 | Iustin Pop | sil = Container.map (\i -> setName i (stripSuffix csl $ nameOf i)) il3 |
149 | 8472a321 | Iustin Pop | return (snl, sil, common_suffix) |
150 | 446d8827 | Iustin Pop | |
151 | 9188aeef | Iustin Pop | -- | Checks the cluster data for consistency. |
152 | 262a08a2 | Iustin Pop | checkData :: Node.List -> Instance.List |
153 | 262a08a2 | Iustin Pop | -> ([String], Node.List) |
154 | dbd6700b | Iustin Pop | checkData nl il = |
155 | 446d8827 | Iustin Pop | Container.mapAccum |
156 | 446d8827 | Iustin Pop | (\ msgs node -> |
157 | dbd6700b | Iustin Pop | let nname = Node.name node |
158 | 446d8827 | Iustin Pop | nilst = map (flip Container.find $ il) (Node.plist node) |
159 | 446d8827 | Iustin Pop | dilst = filter (not . Instance.running) nilst |
160 | 446d8827 | Iustin Pop | adj_mem = sum . map Instance.mem $ dilst |
161 | 446d8827 | Iustin Pop | delta_mem = (truncate $ Node.t_mem node) |
162 | 446d8827 | Iustin Pop | - (Node.n_mem node) |
163 | 446d8827 | Iustin Pop | - (Node.f_mem node) |
164 | 446d8827 | Iustin Pop | - (nodeImem node il) |
165 | 446d8827 | Iustin Pop | + adj_mem |
166 | 446d8827 | Iustin Pop | delta_dsk = (truncate $ Node.t_dsk node) |
167 | 446d8827 | Iustin Pop | - (Node.f_dsk node) |
168 | 446d8827 | Iustin Pop | - (nodeIdsk node il) |
169 | 446d8827 | Iustin Pop | newn = Node.setFmem (Node.setXmem node delta_mem) |
170 | 446d8827 | Iustin Pop | (Node.f_mem node - adj_mem) |
171 | 446d8827 | Iustin Pop | umsg1 = if delta_mem > 512 || delta_dsk > 1024 |
172 | 446d8827 | Iustin Pop | then [printf "node %s is missing %d MB ram \ |
173 | 446d8827 | Iustin Pop | \and %d GB disk" |
174 | 446d8827 | Iustin Pop | nname delta_mem (delta_dsk `div` 1024)] |
175 | 446d8827 | Iustin Pop | else [] |
176 | 446d8827 | Iustin Pop | in (msgs ++ umsg1, newn) |
177 | 446d8827 | Iustin Pop | ) [] nl |
178 | 446d8827 | Iustin Pop | |
179 | 446d8827 | Iustin Pop | -- | Compute the amount of memory used by primary instances on a node. |
180 | 262a08a2 | Iustin Pop | nodeImem :: Node.Node -> Instance.List -> Int |
181 | 446d8827 | Iustin Pop | nodeImem node il = |
182 | 446d8827 | Iustin Pop | let rfind = flip Container.find $ il |
183 | 446d8827 | Iustin Pop | in sum . map Instance.mem . |
184 | 446d8827 | Iustin Pop | map rfind $ Node.plist node |
185 | 446d8827 | Iustin Pop | |
186 | 446d8827 | Iustin Pop | -- | Compute the amount of disk used by instances on a node (either primary |
187 | 446d8827 | Iustin Pop | -- or secondary). |
188 | 262a08a2 | Iustin Pop | nodeIdsk :: Node.Node -> Instance.List -> Int |
189 | 446d8827 | Iustin Pop | nodeIdsk node il = |
190 | 446d8827 | Iustin Pop | let rfind = flip Container.find $ il |
191 | 446d8827 | Iustin Pop | in sum . map Instance.dsk . |
192 | 446d8827 | Iustin Pop | map rfind $ (Node.plist node) ++ (Node.slist node) |