root / htools / Ganeti / HTools / Loader.hs @ 7c14b50a
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1 | 525bfb36 | Iustin Pop | {-| Generic data loader. |
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2 | 040afc35 | Iustin Pop | |
3 | e8f89bb6 | Iustin Pop | This module holds the common code for parsing the input data after it |
4 | e8f89bb6 | Iustin Pop | has been loaded from external sources. |
5 | 040afc35 | Iustin Pop | |
6 | 040afc35 | Iustin Pop | -} |
7 | 040afc35 | Iustin Pop | |
8 | e2fa2baf | Iustin Pop | {- |
9 | e2fa2baf | Iustin Pop | |
10 | 2a8e2dc9 | 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.Loader |
30 | 446d8827 | Iustin Pop | ( mergeData |
31 | 446d8827 | Iustin Pop | , checkData |
32 | 446d8827 | Iustin Pop | , assignIndices |
33 | 446d8827 | Iustin Pop | , lookupNode |
34 | 5a1edeb6 | Iustin Pop | , lookupInstance |
35 | f4531f51 | Iustin Pop | , lookupGroup |
36 | 3e4480e0 | Iustin Pop | , commonSuffix |
37 | 2c3273e7 | Iustin Pop | , RelocMode(..) |
38 | 1fe412bb | Iustin Pop | , EvacMode(..) |
39 | 19f38ee8 | Iustin Pop | , RqType(..) |
40 | 19f38ee8 | Iustin Pop | , Request(..) |
41 | 7b6e99b3 | Iustin Pop | , ClusterData(..) |
42 | 7b6e99b3 | Iustin Pop | , emptyCluster |
43 | 446d8827 | Iustin Pop | ) where |
44 | 040afc35 | Iustin Pop | |
45 | e4c5beaf | Iustin Pop | import Data.List |
46 | 2d0ca2c5 | Iustin Pop | import qualified Data.Map as M |
47 | 446d8827 | Iustin Pop | import Text.Printf (printf) |
48 | e4c5beaf | Iustin Pop | |
49 | e4c5beaf | Iustin Pop | import qualified Ganeti.HTools.Container as Container |
50 | e4c5beaf | Iustin Pop | import qualified Ganeti.HTools.Instance as Instance |
51 | e4c5beaf | Iustin Pop | import qualified Ganeti.HTools.Node as Node |
52 | a679e9dc | Iustin Pop | import qualified Ganeti.HTools.Group as Group |
53 | e4c5beaf | Iustin Pop | |
54 | e4c5beaf | Iustin Pop | import Ganeti.HTools.Types |
55 | e4c5beaf | Iustin Pop | |
56 | f5e67f55 | Iustin Pop | -- * Constants |
57 | f5e67f55 | Iustin Pop | |
58 | 525bfb36 | Iustin Pop | -- | The exclusion tag prefix. |
59 | f5e67f55 | Iustin Pop | exTagsPrefix :: String |
60 | f5e67f55 | Iustin Pop | exTagsPrefix = "htools:iextags:" |
61 | f5e67f55 | Iustin Pop | |
62 | 19f38ee8 | Iustin Pop | -- * Types |
63 | 19f38ee8 | Iustin Pop | |
64 | 2c3273e7 | Iustin Pop | -- | The iallocator multi-evac group mode type. |
65 | 2c3273e7 | Iustin Pop | data RelocMode = KeepGroup |
66 | 2c3273e7 | Iustin Pop | | ChangeGroup [Gdx] |
67 | 2c3273e7 | Iustin Pop | | AnyGroup |
68 | 2c3273e7 | Iustin Pop | deriving (Show, Read) |
69 | 2c3273e7 | Iustin Pop | |
70 | 54365762 | Iustin Pop | {-| The iallocator request type. |
71 | 19f38ee8 | Iustin Pop | |
72 | 19f38ee8 | Iustin Pop | This type denotes what request we got from Ganeti and also holds |
73 | 19f38ee8 | Iustin Pop | request-specific fields. |
74 | 19f38ee8 | Iustin Pop | |
75 | 19f38ee8 | Iustin Pop | -} |
76 | 19f38ee8 | Iustin Pop | data RqType |
77 | 19f38ee8 | Iustin Pop | = Allocate Instance.Instance Int -- ^ A new instance allocation |
78 | 19f38ee8 | Iustin Pop | | Relocate Idx Int [Ndx] -- ^ Move an instance to a new |
79 | 19f38ee8 | Iustin Pop | -- secondary node |
80 | 54365762 | Iustin Pop | | Evacuate [Ndx] -- ^ Evacuate nodes |
81 | 2c3273e7 | Iustin Pop | | MultiReloc [Idx] RelocMode -- ^ Multi-relocate mode |
82 | 1fe412bb | Iustin Pop | | NodeEvacuate [Idx] EvacMode -- ^ node-evacuate mode |
83 | 6bc39970 | Iustin Pop | deriving (Show, Read) |
84 | 19f38ee8 | Iustin Pop | |
85 | 19f38ee8 | Iustin Pop | -- | A complete request, as received from Ganeti. |
86 | 34c00528 | Iustin Pop | data Request = Request RqType ClusterData |
87 | 6bc39970 | Iustin Pop | deriving (Show, Read) |
88 | 19f38ee8 | Iustin Pop | |
89 | 7b6e99b3 | Iustin Pop | -- | The cluster state. |
90 | 7b6e99b3 | Iustin Pop | data ClusterData = ClusterData |
91 | 7b6e99b3 | Iustin Pop | { cdGroups :: Group.List -- ^ The node group list |
92 | 7b6e99b3 | Iustin Pop | , cdNodes :: Node.List -- ^ The node list |
93 | 7b6e99b3 | Iustin Pop | , cdInstances :: Instance.List -- ^ The instance list |
94 | 7b6e99b3 | Iustin Pop | , cdTags :: [String] -- ^ The cluster tags |
95 | 6bc39970 | Iustin Pop | } deriving (Show, Read) |
96 | 7b6e99b3 | Iustin Pop | |
97 | 7b6e99b3 | Iustin Pop | -- | An empty cluster. |
98 | 7b6e99b3 | Iustin Pop | emptyCluster :: ClusterData |
99 | 7b6e99b3 | Iustin Pop | emptyCluster = ClusterData Container.empty Container.empty Container.empty [] |
100 | 7b6e99b3 | Iustin Pop | |
101 | 19f38ee8 | Iustin Pop | -- * Functions |
102 | 19f38ee8 | Iustin Pop | |
103 | 9188aeef | Iustin Pop | -- | Lookups a node into an assoc list. |
104 | 6ff78049 | Iustin Pop | lookupNode :: (Monad m) => NameAssoc -> String -> String -> m Ndx |
105 | 040afc35 | Iustin Pop | lookupNode ktn inst node = |
106 | 2d0ca2c5 | Iustin Pop | case M.lookup node ktn of |
107 | 040afc35 | Iustin Pop | Nothing -> fail $ "Unknown node '" ++ node ++ "' for instance " ++ inst |
108 | 040afc35 | Iustin Pop | Just idx -> return idx |
109 | 040afc35 | Iustin Pop | |
110 | 9188aeef | Iustin Pop | -- | Lookups an instance into an assoc list. |
111 | 6ff78049 | Iustin Pop | lookupInstance :: (Monad m) => NameAssoc -> String -> m Idx |
112 | 5a1edeb6 | Iustin Pop | lookupInstance kti inst = |
113 | 2d0ca2c5 | Iustin Pop | case M.lookup inst kti of |
114 | 5a1edeb6 | Iustin Pop | Nothing -> fail $ "Unknown instance '" ++ inst ++ "'" |
115 | 5a1edeb6 | Iustin Pop | Just idx -> return idx |
116 | 5a1edeb6 | Iustin Pop | |
117 | f4531f51 | Iustin Pop | -- | Lookups a group into an assoc list. |
118 | f4531f51 | Iustin Pop | lookupGroup :: (Monad m) => NameAssoc -> String -> String -> m Gdx |
119 | f4531f51 | Iustin Pop | lookupGroup ktg nname gname = |
120 | f4531f51 | Iustin Pop | case M.lookup gname ktg of |
121 | f4531f51 | Iustin Pop | Nothing -> fail $ "Unknown group '" ++ gname ++ "' for node " ++ nname |
122 | f4531f51 | Iustin Pop | Just idx -> return idx |
123 | f4531f51 | Iustin Pop | |
124 | 9188aeef | Iustin Pop | -- | Given a list of elements (and their names), assign indices to them. |
125 | 497e30a1 | Iustin Pop | assignIndices :: (Element a) => |
126 | 497e30a1 | Iustin Pop | [(String, a)] |
127 | 99b63608 | Iustin Pop | -> (NameAssoc, Container.Container a) |
128 | 2d0ca2c5 | Iustin Pop | assignIndices nodes = |
129 | 2d0ca2c5 | Iustin Pop | let (na, idx_node) = |
130 | 2d0ca2c5 | Iustin Pop | unzip . map (\ (idx, (k, v)) -> ((k, idx), (idx, setIdx v idx))) |
131 | 2d0ca2c5 | Iustin Pop | . zip [0..] $ nodes |
132 | cb0c77ff | Iustin Pop | in (M.fromList na, Container.fromList idx_node) |
133 | 78694255 | Iustin Pop | |
134 | 9188aeef | Iustin Pop | -- | For each instance, add its index to its primary and secondary nodes. |
135 | 99b63608 | Iustin Pop | fixNodes :: Node.List |
136 | aa8d2e71 | Iustin Pop | -> Instance.Instance |
137 | 99b63608 | Iustin Pop | -> Node.List |
138 | aa8d2e71 | Iustin Pop | fixNodes accu inst = |
139 | d71d0a1d | Iustin Pop | let |
140 | 2060348b | Iustin Pop | pdx = Instance.pNode inst |
141 | 2060348b | Iustin Pop | sdx = Instance.sNode inst |
142 | 99b63608 | Iustin Pop | pold = Container.find pdx accu |
143 | a488a217 | Iustin Pop | pnew = Node.setPri pold inst |
144 | 99b63608 | Iustin Pop | ac2 = Container.add pdx pnew accu |
145 | d71d0a1d | Iustin Pop | in |
146 | d71d0a1d | Iustin Pop | if sdx /= Node.noSecondary |
147 | 99b63608 | Iustin Pop | then let sold = Container.find sdx accu |
148 | a488a217 | Iustin Pop | snew = Node.setSec sold inst |
149 | 99b63608 | Iustin Pop | in Container.add sdx snew ac2 |
150 | d71d0a1d | Iustin Pop | else ac2 |
151 | e4c5beaf | Iustin Pop | |
152 | 525bfb36 | Iustin Pop | -- | Remove non-selected tags from the exclusion list. |
153 | 0f15cc76 | Iustin Pop | filterExTags :: [String] -> Instance.Instance -> Instance.Instance |
154 | 0f15cc76 | Iustin Pop | filterExTags tl inst = |
155 | 0f15cc76 | Iustin Pop | let old_tags = Instance.tags inst |
156 | 5182e970 | Iustin Pop | new_tags = filter (\tag -> any (`isPrefixOf` tag) tl) |
157 | 0f15cc76 | Iustin Pop | old_tags |
158 | 0f15cc76 | Iustin Pop | in inst { Instance.tags = new_tags } |
159 | 0f15cc76 | Iustin Pop | |
160 | 525bfb36 | Iustin Pop | -- | Update the movable attribute. |
161 | c6ccc073 | Guido Trotter | updateMovable :: [String] -- ^ Selected instances (if not empty) |
162 | c6ccc073 | Guido Trotter | -> [String] -- ^ Excluded instances |
163 | c6ccc073 | Guido Trotter | -> Instance.Instance -- ^ Target Instance |
164 | c6ccc073 | Guido Trotter | -> Instance.Instance -- ^ Target Instance with updated attribute |
165 | c6ccc073 | Guido Trotter | updateMovable selinsts exinsts inst = |
166 | 39f979b8 | Iustin Pop | if Instance.sNode inst == Node.noSecondary || |
167 | c6ccc073 | Guido Trotter | Instance.name inst `elem` exinsts || |
168 | c6ccc073 | Guido Trotter | not (null selinsts || Instance.name inst `elem` selinsts) |
169 | 39f979b8 | Iustin Pop | then Instance.setMovable inst False |
170 | 39f979b8 | Iustin Pop | else inst |
171 | 39f979b8 | Iustin Pop | |
172 | f9fc7a63 | Iustin Pop | -- | Compute the longest common suffix of a list of strings that |
173 | 525bfb36 | Iustin Pop | -- starts with a dot. |
174 | 8472a321 | Iustin Pop | longestDomain :: [String] -> String |
175 | e4c5beaf | Iustin Pop | longestDomain [] = "" |
176 | 8472a321 | Iustin Pop | longestDomain (x:xs) = |
177 | 8472a321 | Iustin Pop | foldr (\ suffix accu -> if all (isSuffixOf suffix) xs |
178 | e4c5beaf | Iustin Pop | then suffix |
179 | e4c5beaf | Iustin Pop | else accu) |
180 | e4c5beaf | Iustin Pop | "" $ filter (isPrefixOf ".") (tails x) |
181 | e4c5beaf | Iustin Pop | |
182 | 525bfb36 | Iustin Pop | -- | Extracts the exclusion tags from the cluster configuration. |
183 | f5e67f55 | Iustin Pop | extractExTags :: [String] -> [String] |
184 | f5e67f55 | Iustin Pop | extractExTags = |
185 | f5e67f55 | Iustin Pop | map (drop (length exTagsPrefix)) . |
186 | f5e67f55 | Iustin Pop | filter (isPrefixOf exTagsPrefix) |
187 | f5e67f55 | Iustin Pop | |
188 | 525bfb36 | Iustin Pop | -- | Extracts the common suffix from node\/instance names. |
189 | 3e4480e0 | Iustin Pop | commonSuffix :: Node.List -> Instance.List -> String |
190 | 3e4480e0 | Iustin Pop | commonSuffix nl il = |
191 | 3e4480e0 | Iustin Pop | let node_names = map Node.name $ Container.elems nl |
192 | 3e4480e0 | Iustin Pop | inst_names = map Instance.name $ Container.elems il |
193 | 3e4480e0 | Iustin Pop | in longestDomain (node_names ++ inst_names) |
194 | 3e4480e0 | Iustin Pop | |
195 | 9188aeef | Iustin Pop | -- | Initializer function that loads the data from a node and instance |
196 | 9188aeef | Iustin Pop | -- list and massages it into the correct format. |
197 | aa8d2e71 | Iustin Pop | mergeData :: [(String, DynUtil)] -- ^ Instance utilisation data |
198 | 0f15cc76 | Iustin Pop | -> [String] -- ^ Exclusion tags |
199 | 2d1708e0 | Guido Trotter | -> [String] -- ^ Selected instances (if not empty) |
200 | 2d1708e0 | Guido Trotter | -> [String] -- ^ Excluded instances |
201 | f4f6eb0b | Iustin Pop | -> ClusterData -- ^ Data from backends |
202 | c0e31451 | Iustin Pop | -> Result ClusterData -- ^ Fixed cluster data |
203 | 2d1708e0 | Guido Trotter | mergeData um extags selinsts exinsts cdata@(ClusterData _ nl il2 tags) = |
204 | 99b63608 | Iustin Pop | let il = Container.elems il2 |
205 | a5f8dcdc | Iustin Pop | il3 = foldl' (\im (name, n_util) -> |
206 | a5f8dcdc | Iustin Pop | case Container.findByName im name of |
207 | a5f8dcdc | Iustin Pop | Nothing -> im -- skipping unknown instance |
208 | a5f8dcdc | Iustin Pop | Just inst -> |
209 | a5f8dcdc | Iustin Pop | let new_i = inst { Instance.util = n_util } |
210 | a5f8dcdc | Iustin Pop | in Container.add (Instance.idx inst) new_i im |
211 | a5f8dcdc | Iustin Pop | ) il2 um |
212 | f5e67f55 | Iustin Pop | allextags = extags ++ extractExTags tags |
213 | 39f979b8 | Iustin Pop | il4 = Container.map (filterExTags allextags . |
214 | c6ccc073 | Guido Trotter | updateMovable selinsts exinsts) il3 |
215 | 0f15cc76 | Iustin Pop | nl2 = foldl' fixNodes nl (Container.elems il4) |
216 | 2a8e2dc9 | Iustin Pop | nl3 = Container.map (flip Node.buildPeers il4) nl2 |
217 | 99b63608 | Iustin Pop | node_names = map Node.name (Container.elems nl) |
218 | 99b63608 | Iustin Pop | inst_names = map Instance.name il |
219 | 8472a321 | Iustin Pop | common_suffix = longestDomain (node_names ++ inst_names) |
220 | 3e4480e0 | Iustin Pop | snl = Container.map (computeAlias common_suffix) nl3 |
221 | 3e4480e0 | Iustin Pop | sil = Container.map (computeAlias common_suffix) il4 |
222 | c854092b | Iustin Pop | all_inst_names = concatMap allNames $ Container.elems sil |
223 | c854092b | Iustin Pop | in if not $ all (`elem` all_inst_names) exinsts |
224 | 5ab2b771 | Iustin Pop | then Bad $ "Some of the excluded instances are unknown: " ++ |
225 | c854092b | Iustin Pop | show (exinsts \\ all_inst_names) |
226 | fcd731d9 | Guido Trotter | else if not $ all (`elem` all_inst_names) selinsts |
227 | fcd731d9 | Guido Trotter | then Bad $ "Some of the selected instances are unknown: " ++ |
228 | fcd731d9 | Guido Trotter | show (selinsts \\ all_inst_names) |
229 | fcd731d9 | Guido Trotter | else Ok cdata { cdNodes = snl, cdInstances = sil } |
230 | 446d8827 | Iustin Pop | |
231 | 9188aeef | Iustin Pop | -- | Checks the cluster data for consistency. |
232 | 262a08a2 | Iustin Pop | checkData :: Node.List -> Instance.List |
233 | 262a08a2 | Iustin Pop | -> ([String], Node.List) |
234 | dbd6700b | Iustin Pop | checkData nl il = |
235 | 446d8827 | Iustin Pop | Container.mapAccum |
236 | 446d8827 | Iustin Pop | (\ msgs node -> |
237 | dbd6700b | Iustin Pop | let nname = Node.name node |
238 | 5182e970 | Iustin Pop | nilst = map (`Container.find` il) (Node.pList node) |
239 | 446d8827 | Iustin Pop | dilst = filter (not . Instance.running) nilst |
240 | 446d8827 | Iustin Pop | adj_mem = sum . map Instance.mem $ dilst |
241 | 2060348b | Iustin Pop | delta_mem = truncate (Node.tMem node) |
242 | 2060348b | Iustin Pop | - Node.nMem node |
243 | 2060348b | Iustin Pop | - Node.fMem node |
244 | 9f6dcdea | Iustin Pop | - nodeImem node il |
245 | 446d8827 | Iustin Pop | + adj_mem |
246 | 2060348b | Iustin Pop | delta_dsk = truncate (Node.tDsk node) |
247 | 2060348b | Iustin Pop | - Node.fDsk node |
248 | 9f6dcdea | Iustin Pop | - nodeIdsk node il |
249 | 446d8827 | Iustin Pop | newn = Node.setFmem (Node.setXmem node delta_mem) |
250 | 2060348b | Iustin Pop | (Node.fMem node - adj_mem) |
251 | 9f6dcdea | Iustin Pop | umsg1 = [printf "node %s is missing %d MB ram \ |
252 | 9f6dcdea | Iustin Pop | \and %d GB disk" |
253 | 9f6dcdea | Iustin Pop | nname delta_mem (delta_dsk `div` 1024) | |
254 | 9f6dcdea | Iustin Pop | delta_mem > 512 || delta_dsk > 1024]::[String] |
255 | 446d8827 | Iustin Pop | in (msgs ++ umsg1, newn) |
256 | 446d8827 | Iustin Pop | ) [] nl |
257 | 446d8827 | Iustin Pop | |
258 | 446d8827 | Iustin Pop | -- | Compute the amount of memory used by primary instances on a node. |
259 | 262a08a2 | Iustin Pop | nodeImem :: Node.Node -> Instance.List -> Int |
260 | 446d8827 | Iustin Pop | nodeImem node il = |
261 | 9f6dcdea | Iustin Pop | let rfind = flip Container.find il |
262 | 9f6dcdea | Iustin Pop | in sum . map (Instance.mem . rfind) |
263 | 2060348b | Iustin Pop | $ Node.pList node |
264 | 446d8827 | Iustin Pop | |
265 | 446d8827 | Iustin Pop | -- | Compute the amount of disk used by instances on a node (either primary |
266 | 446d8827 | Iustin Pop | -- or secondary). |
267 | 262a08a2 | Iustin Pop | nodeIdsk :: Node.Node -> Instance.List -> Int |
268 | 446d8827 | Iustin Pop | nodeIdsk node il = |
269 | 9f6dcdea | Iustin Pop | let rfind = flip Container.find il |
270 | 9f6dcdea | Iustin Pop | in sum . map (Instance.dsk . rfind) |
271 | 2060348b | Iustin Pop | $ Node.pList node ++ Node.sList node |