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1 | 6583e677 | Iustin Pop | {-| Implementation of the LUXI loader. |
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2 | 53ec9022 | Iustin Pop | |
3 | 53ec9022 | Iustin Pop | -} |
4 | 53ec9022 | Iustin Pop | |
5 | 53ec9022 | Iustin Pop | {- |
6 | 53ec9022 | Iustin Pop | |
7 | 39420403 | Iustin Pop | Copyright (C) 2009, 2010, 2011 Google Inc. |
8 | 53ec9022 | Iustin Pop | |
9 | 53ec9022 | Iustin Pop | This program is free software; you can redistribute it and/or modify |
10 | 53ec9022 | Iustin Pop | it under the terms of the GNU General Public License as published by |
11 | 53ec9022 | Iustin Pop | the Free Software Foundation; either version 2 of the License, or |
12 | 53ec9022 | Iustin Pop | (at your option) any later version. |
13 | 53ec9022 | Iustin Pop | |
14 | 53ec9022 | Iustin Pop | This program is distributed in the hope that it will be useful, but |
15 | 53ec9022 | Iustin Pop | WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | 53ec9022 | Iustin Pop | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
17 | 53ec9022 | Iustin Pop | General Public License for more details. |
18 | 53ec9022 | Iustin Pop | |
19 | 53ec9022 | Iustin Pop | You should have received a copy of the GNU General Public License |
20 | 53ec9022 | Iustin Pop | along with this program; if not, write to the Free Software |
21 | 53ec9022 | Iustin Pop | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
22 | 53ec9022 | Iustin Pop | 02110-1301, USA. |
23 | 53ec9022 | Iustin Pop | |
24 | 53ec9022 | Iustin Pop | -} |
25 | 53ec9022 | Iustin Pop | |
26 | 53ec9022 | Iustin Pop | module Ganeti.HTools.Luxi |
27 | 53ec9022 | Iustin Pop | ( |
28 | 53ec9022 | Iustin Pop | loadData |
29 | b3f0710c | Iustin Pop | , parseData |
30 | 53ec9022 | Iustin Pop | ) where |
31 | 53ec9022 | Iustin Pop | |
32 | 53ec9022 | Iustin Pop | import qualified Control.Exception as E |
33 | 53ec9022 | Iustin Pop | import Text.JSON.Types |
34 | 39420403 | Iustin Pop | import qualified Text.JSON |
35 | 53ec9022 | Iustin Pop | |
36 | 6583e677 | Iustin Pop | import qualified Ganeti.Luxi as L |
37 | 53ec9022 | Iustin Pop | import Ganeti.HTools.Loader |
38 | 53ec9022 | Iustin Pop | import Ganeti.HTools.Types |
39 | a679e9dc | Iustin Pop | import qualified Ganeti.HTools.Group as Group |
40 | 53ec9022 | Iustin Pop | import qualified Ganeti.HTools.Node as Node |
41 | 53ec9022 | Iustin Pop | import qualified Ganeti.HTools.Instance as Instance |
42 | d12f50b2 | Iustin Pop | import Ganeti.HTools.Utils (fromJVal, annotateResult, tryFromObj, asJSObject, |
43 | d12f50b2 | Iustin Pop | fromObj) |
44 | 53ec9022 | Iustin Pop | |
45 | 53ec9022 | Iustin Pop | -- * Utility functions |
46 | 53ec9022 | Iustin Pop | |
47 | 92678b3c | Iustin Pop | -- | Get values behind \"data\" part of the result. |
48 | 92678b3c | Iustin Pop | getData :: (Monad m) => JSValue -> m JSValue |
49 | d12f50b2 | Iustin Pop | getData (JSObject o) = fromObj (fromJSObject o) "data" |
50 | d12f50b2 | Iustin Pop | getData x = fail $ "Invalid input, expected dict entry but got " ++ show x |
51 | d12f50b2 | Iustin Pop | |
52 | d12f50b2 | Iustin Pop | -- | Converts a (status, value) into m value, if possible. |
53 | d12f50b2 | Iustin Pop | parseQueryField :: (Monad m) => JSValue -> m (JSValue, JSValue) |
54 | d12f50b2 | Iustin Pop | parseQueryField (JSArray [status, result]) = return (status, result) |
55 | d12f50b2 | Iustin Pop | parseQueryField o = |
56 | d12f50b2 | Iustin Pop | fail $ "Invalid query field, expected (status, value) but got " ++ show o |
57 | d12f50b2 | Iustin Pop | |
58 | d12f50b2 | Iustin Pop | -- | Parse a result row. |
59 | d12f50b2 | Iustin Pop | parseQueryRow :: (Monad m) => JSValue -> m [(JSValue, JSValue)] |
60 | d12f50b2 | Iustin Pop | parseQueryRow (JSArray arr) = mapM parseQueryField arr |
61 | d12f50b2 | Iustin Pop | parseQueryRow o = |
62 | d12f50b2 | Iustin Pop | fail $ "Invalid query row result, expected array but got " ++ show o |
63 | d12f50b2 | Iustin Pop | |
64 | d12f50b2 | Iustin Pop | -- | Parse an overall query result and get the [(status, value)] list |
65 | d12f50b2 | Iustin Pop | -- for each element queried. |
66 | d12f50b2 | Iustin Pop | parseQueryResult :: (Monad m) => JSValue -> m [[(JSValue, JSValue)]] |
67 | d12f50b2 | Iustin Pop | parseQueryResult (JSArray arr) = mapM parseQueryRow arr |
68 | d12f50b2 | Iustin Pop | parseQueryResult o = |
69 | d12f50b2 | Iustin Pop | fail $ "Invalid query result, expected array but got " ++ show o |
70 | 92678b3c | Iustin Pop | |
71 | 92678b3c | Iustin Pop | -- | Prepare resulting output as parsers expect it. |
72 | 92678b3c | Iustin Pop | extractArray :: (Monad m) => JSValue -> m [JSValue] |
73 | d12f50b2 | Iustin Pop | extractArray v = |
74 | d12f50b2 | Iustin Pop | getData v >>= parseQueryResult >>= (return . map (JSArray . map snd)) |
75 | 92678b3c | Iustin Pop | |
76 | 39420403 | Iustin Pop | -- | Annotate errors when converting values with owner/attribute for |
77 | 39420403 | Iustin Pop | -- better debugging. |
78 | 39420403 | Iustin Pop | genericConvert :: (Text.JSON.JSON a) => |
79 | 39420403 | Iustin Pop | String -- ^ The object type |
80 | 39420403 | Iustin Pop | -> String -- ^ The object name |
81 | 39420403 | Iustin Pop | -> String -- ^ The attribute we're trying to convert |
82 | 39420403 | Iustin Pop | -> JSValue -- ^ The value we try to convert |
83 | 39420403 | Iustin Pop | -> Result a -- ^ The annotated result |
84 | 39420403 | Iustin Pop | genericConvert otype oname oattr = |
85 | 6a062ff9 | Iustin Pop | annotateResult (otype ++ " '" ++ oname ++ |
86 | 6a062ff9 | Iustin Pop | "', error while reading attribute '" ++ |
87 | 39420403 | Iustin Pop | oattr ++ "'") . fromJVal |
88 | 39420403 | Iustin Pop | |
89 | 53ec9022 | Iustin Pop | -- * Data querying functionality |
90 | 53ec9022 | Iustin Pop | |
91 | 53ec9022 | Iustin Pop | -- | The input data for node query. |
92 | 683b1ca7 | Iustin Pop | queryNodesMsg :: L.LuxiOp |
93 | 53ec9022 | Iustin Pop | queryNodesMsg = |
94 | 92678b3c | Iustin Pop | L.Query L.QRNode ["name", "mtotal", "mnode", "mfree", "dtotal", "dfree", |
95 | 92678b3c | Iustin Pop | "ctotal", "offline", "drained", "vm_capable", |
96 | b20cbf06 | Iustin Pop | "group.uuid"] () |
97 | 53ec9022 | Iustin Pop | |
98 | 53ec9022 | Iustin Pop | -- | The input data for instance query. |
99 | 683b1ca7 | Iustin Pop | queryInstancesMsg :: L.LuxiOp |
100 | 53ec9022 | Iustin Pop | queryInstancesMsg = |
101 | 92678b3c | Iustin Pop | L.Query L.QRInstance ["name", "disk_usage", "be/memory", "be/vcpus", |
102 | 92678b3c | Iustin Pop | "status", "pnode", "snodes", "tags", "oper_ram", |
103 | b20cbf06 | Iustin Pop | "be/auto_balance", "disk_template"] () |
104 | 53ec9022 | Iustin Pop | |
105 | a679e9dc | Iustin Pop | -- | The input data for cluster query. |
106 | 683b1ca7 | Iustin Pop | queryClusterInfoMsg :: L.LuxiOp |
107 | 683b1ca7 | Iustin Pop | queryClusterInfoMsg = L.QueryClusterInfo |
108 | f89235f1 | Iustin Pop | |
109 | a679e9dc | Iustin Pop | -- | The input data for node group query. |
110 | a679e9dc | Iustin Pop | queryGroupsMsg :: L.LuxiOp |
111 | a679e9dc | Iustin Pop | queryGroupsMsg = |
112 | b20cbf06 | Iustin Pop | L.Query L.QRGroup ["uuid", "name", "alloc_policy"] () |
113 | a679e9dc | Iustin Pop | |
114 | 179c0828 | Iustin Pop | -- | Wraper over 'callMethod' doing node query. |
115 | 6583e677 | Iustin Pop | queryNodes :: L.Client -> IO (Result JSValue) |
116 | 683b1ca7 | Iustin Pop | queryNodes = L.callMethod queryNodesMsg |
117 | 53ec9022 | Iustin Pop | |
118 | 179c0828 | Iustin Pop | -- | Wraper over 'callMethod' doing instance query. |
119 | 6583e677 | Iustin Pop | queryInstances :: L.Client -> IO (Result JSValue) |
120 | 683b1ca7 | Iustin Pop | queryInstances = L.callMethod queryInstancesMsg |
121 | 53ec9022 | Iustin Pop | |
122 | 179c0828 | Iustin Pop | -- | Wrapper over 'callMethod' doing cluster information query. |
123 | f89235f1 | Iustin Pop | queryClusterInfo :: L.Client -> IO (Result JSValue) |
124 | 683b1ca7 | Iustin Pop | queryClusterInfo = L.callMethod queryClusterInfoMsg |
125 | f89235f1 | Iustin Pop | |
126 | a679e9dc | Iustin Pop | -- | Wrapper over callMethod doing group query. |
127 | a679e9dc | Iustin Pop | queryGroups :: L.Client -> IO (Result JSValue) |
128 | a679e9dc | Iustin Pop | queryGroups = L.callMethod queryGroupsMsg |
129 | a679e9dc | Iustin Pop | |
130 | 53ec9022 | Iustin Pop | -- | Parse a instance list in JSON format. |
131 | 53ec9022 | Iustin Pop | getInstances :: NameAssoc |
132 | 53ec9022 | Iustin Pop | -> JSValue |
133 | 53ec9022 | Iustin Pop | -> Result [(String, Instance.Instance)] |
134 | 92678b3c | Iustin Pop | getInstances ktn arr = extractArray arr >>= mapM (parseInstance ktn) |
135 | 53ec9022 | Iustin Pop | |
136 | 53ec9022 | Iustin Pop | -- | Construct an instance from a JSON object. |
137 | 6ff78049 | Iustin Pop | parseInstance :: NameAssoc |
138 | 53ec9022 | Iustin Pop | -> JSValue |
139 | 53ec9022 | Iustin Pop | -> Result (String, Instance.Instance) |
140 | 27671a61 | Iustin Pop | parseInstance ktn (JSArray [ name, disk, mem, vcpus |
141 | 6880526c | Iustin Pop | , status, pnode, snodes, tags, oram |
142 | b3c5e8de | Iustin Pop | , auto_balance, disk_template ]) = do |
143 | 117dc2d8 | Iustin Pop | xname <- annotateResult "Parsing new instance" (fromJVal name) |
144 | 39420403 | Iustin Pop | let convert a = genericConvert "Instance" xname a |
145 | 39420403 | Iustin Pop | xdisk <- convert "disk_usage" disk |
146 | 6402a260 | Iustin Pop | xmem <- (case oram of |
147 | 39420403 | Iustin Pop | JSRational _ _ -> convert "oper_ram" oram |
148 | 39420403 | Iustin Pop | _ -> convert "be/memory" mem) |
149 | 39420403 | Iustin Pop | xvcpus <- convert "be/vcpus" vcpus |
150 | 39420403 | Iustin Pop | xpnode <- convert "pnode" pnode >>= lookupNode ktn xname |
151 | 39420403 | Iustin Pop | xsnodes <- convert "snodes" snodes::Result [JSString] |
152 | 53ec9022 | Iustin Pop | snode <- (if null xsnodes then return Node.noSecondary |
153 | 53ec9022 | Iustin Pop | else lookupNode ktn xname (fromJSString $ head xsnodes)) |
154 | 39420403 | Iustin Pop | xrunning <- convert "status" status |
155 | 39420403 | Iustin Pop | xtags <- convert "tags" tags |
156 | 6880526c | Iustin Pop | xauto_balance <- convert "auto_balance" auto_balance |
157 | b3c5e8de | Iustin Pop | xdt <- convert "disk_template" disk_template |
158 | 17e7af2b | Iustin Pop | let inst = Instance.create xname xmem xdisk xvcpus |
159 | b3c5e8de | Iustin Pop | xrunning xtags xauto_balance xpnode snode xdt |
160 | 53ec9022 | Iustin Pop | return (xname, inst) |
161 | 53ec9022 | Iustin Pop | |
162 | 53ec9022 | Iustin Pop | parseInstance _ v = fail ("Invalid instance query result: " ++ show v) |
163 | 53ec9022 | Iustin Pop | |
164 | 53ec9022 | Iustin Pop | -- | Parse a node list in JSON format. |
165 | 10ef6b4e | Iustin Pop | getNodes :: NameAssoc -> JSValue -> Result [(String, Node.Node)] |
166 | 92678b3c | Iustin Pop | getNodes ktg arr = extractArray arr >>= mapM (parseNode ktg) |
167 | 53ec9022 | Iustin Pop | |
168 | 53ec9022 | Iustin Pop | -- | Construct a node from a JSON object. |
169 | 10ef6b4e | Iustin Pop | parseNode :: NameAssoc -> JSValue -> Result (String, Node.Node) |
170 | 10ef6b4e | Iustin Pop | parseNode ktg (JSArray [ name, mtotal, mnode, mfree, dtotal, dfree |
171 | 10ef6b4e | Iustin Pop | , ctotal, offline, drained, vm_capable, g_uuid ]) |
172 | 53ec9022 | Iustin Pop | = do |
173 | 117dc2d8 | Iustin Pop | xname <- annotateResult "Parsing new node" (fromJVal name) |
174 | 39420403 | Iustin Pop | let convert a = genericConvert "Node" xname a |
175 | 39420403 | Iustin Pop | xoffline <- convert "offline" offline |
176 | 39420403 | Iustin Pop | xdrained <- convert "drained" drained |
177 | 39420403 | Iustin Pop | xvm_capable <- convert "vm_capable" vm_capable |
178 | 39420403 | Iustin Pop | xgdx <- convert "group.uuid" g_uuid >>= lookupGroup ktg xname |
179 | 9d775204 | Iustin Pop | node <- (if xoffline || xdrained || not xvm_capable |
180 | 10ef6b4e | Iustin Pop | then return $ Node.create xname 0 0 0 0 0 0 True xgdx |
181 | 53ec9022 | Iustin Pop | else do |
182 | 39420403 | Iustin Pop | xmtotal <- convert "mtotal" mtotal |
183 | 39420403 | Iustin Pop | xmnode <- convert "mnode" mnode |
184 | 39420403 | Iustin Pop | xmfree <- convert "mfree" mfree |
185 | 39420403 | Iustin Pop | xdtotal <- convert "dtotal" dtotal |
186 | 39420403 | Iustin Pop | xdfree <- convert "dfree" dfree |
187 | 39420403 | Iustin Pop | xctotal <- convert "ctotal" ctotal |
188 | 53ec9022 | Iustin Pop | return $ Node.create xname xmtotal xmnode xmfree |
189 | 10ef6b4e | Iustin Pop | xdtotal xdfree xctotal False xgdx) |
190 | 53ec9022 | Iustin Pop | return (xname, node) |
191 | 53ec9022 | Iustin Pop | |
192 | 10ef6b4e | Iustin Pop | parseNode _ v = fail ("Invalid node query result: " ++ show v) |
193 | 53ec9022 | Iustin Pop | |
194 | 179c0828 | Iustin Pop | -- | Parses the cluster tags. |
195 | f89235f1 | Iustin Pop | getClusterTags :: JSValue -> Result [String] |
196 | f89235f1 | Iustin Pop | getClusterTags v = do |
197 | f89235f1 | Iustin Pop | let errmsg = "Parsing cluster info" |
198 | f89235f1 | Iustin Pop | obj <- annotateResult errmsg $ asJSObject v |
199 | 5182e970 | Iustin Pop | tryFromObj errmsg (fromJSObject obj) "tags" |
200 | f89235f1 | Iustin Pop | |
201 | 179c0828 | Iustin Pop | -- | Parses the cluster groups. |
202 | a679e9dc | Iustin Pop | getGroups :: JSValue -> Result [(String, Group.Group)] |
203 | 92678b3c | Iustin Pop | getGroups jsv = extractArray jsv >>= mapM parseGroup |
204 | a679e9dc | Iustin Pop | |
205 | 179c0828 | Iustin Pop | -- | Parses a given group information. |
206 | a679e9dc | Iustin Pop | parseGroup :: JSValue -> Result (String, Group.Group) |
207 | 92678b3c | Iustin Pop | parseGroup (JSArray [uuid, name, apol]) = do |
208 | a679e9dc | Iustin Pop | xname <- annotateResult "Parsing new group" (fromJVal name) |
209 | 39420403 | Iustin Pop | let convert a = genericConvert "Group" xname a |
210 | 39420403 | Iustin Pop | xuuid <- convert "uuid" uuid |
211 | 39420403 | Iustin Pop | xapol <- convert "alloc_policy" apol |
212 | d5072e4c | Iustin Pop | return (xuuid, Group.create xname xuuid xapol) |
213 | a679e9dc | Iustin Pop | |
214 | a679e9dc | Iustin Pop | parseGroup v = fail ("Invalid group query result: " ++ show v) |
215 | a679e9dc | Iustin Pop | |
216 | 53ec9022 | Iustin Pop | -- * Main loader functionality |
217 | 53ec9022 | Iustin Pop | |
218 | 525bfb36 | Iustin Pop | -- | Builds the cluster data by querying a given socket name. |
219 | b3f0710c | Iustin Pop | readData :: String -- ^ Unix socket to use as source |
220 | a679e9dc | Iustin Pop | -> IO (Result JSValue, Result JSValue, Result JSValue, Result JSValue) |
221 | b3f0710c | Iustin Pop | readData master = |
222 | 53ec9022 | Iustin Pop | E.bracket |
223 | 6583e677 | Iustin Pop | (L.getClient master) |
224 | 6583e677 | Iustin Pop | L.closeClient |
225 | 53ec9022 | Iustin Pop | (\s -> do |
226 | 53ec9022 | Iustin Pop | nodes <- queryNodes s |
227 | 53ec9022 | Iustin Pop | instances <- queryInstances s |
228 | f89235f1 | Iustin Pop | cinfo <- queryClusterInfo s |
229 | a679e9dc | Iustin Pop | groups <- queryGroups s |
230 | a679e9dc | Iustin Pop | return (groups, nodes, instances, cinfo) |
231 | 53ec9022 | Iustin Pop | ) |
232 | b3f0710c | Iustin Pop | |
233 | 525bfb36 | Iustin Pop | -- | Converts the output of 'readData' into the internal cluster |
234 | 525bfb36 | Iustin Pop | -- representation. |
235 | a679e9dc | Iustin Pop | parseData :: (Result JSValue, Result JSValue, Result JSValue, Result JSValue) |
236 | f4f6eb0b | Iustin Pop | -> Result ClusterData |
237 | a679e9dc | Iustin Pop | parseData (groups, nodes, instances, cinfo) = do |
238 | a679e9dc | Iustin Pop | group_data <- groups >>= getGroups |
239 | 10ef6b4e | Iustin Pop | let (group_names, group_idx) = assignIndices group_data |
240 | 10ef6b4e | Iustin Pop | node_data <- nodes >>= getNodes group_names |
241 | b3f0710c | Iustin Pop | let (node_names, node_idx) = assignIndices node_data |
242 | b3f0710c | Iustin Pop | inst_data <- instances >>= getInstances node_names |
243 | b3f0710c | Iustin Pop | let (_, inst_idx) = assignIndices inst_data |
244 | b3f0710c | Iustin Pop | ctags <- cinfo >>= getClusterTags |
245 | f4f6eb0b | Iustin Pop | return (ClusterData group_idx node_idx inst_idx ctags) |
246 | b3f0710c | Iustin Pop | |
247 | 525bfb36 | Iustin Pop | -- | Top level function for data loading. |
248 | b3f0710c | Iustin Pop | loadData :: String -- ^ Unix socket to use as source |
249 | f4f6eb0b | Iustin Pop | -> IO (Result ClusterData) |
250 | 2a8e2dc9 | Iustin Pop | loadData = fmap parseData . readData |