root / htools / Ganeti / HTools / Rapi.hs @ 97da6b71
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1 | a7654563 | Iustin Pop | {-| Implementation of the RAPI client interface. |
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2 | a7654563 | Iustin Pop | |
3 | a7654563 | Iustin Pop | -} |
4 | a7654563 | Iustin Pop | |
5 | e2fa2baf | Iustin Pop | {- |
6 | e2fa2baf | Iustin Pop | |
7 | 4d8e5008 | Iustin Pop | Copyright (C) 2009, 2010, 2011 Google Inc. |
8 | e2fa2baf | Iustin Pop | |
9 | e2fa2baf | Iustin Pop | This program is free software; you can redistribute it and/or modify |
10 | e2fa2baf | Iustin Pop | it under the terms of the GNU General Public License as published by |
11 | e2fa2baf | Iustin Pop | the Free Software Foundation; either version 2 of the License, or |
12 | e2fa2baf | Iustin Pop | (at your option) any later version. |
13 | e2fa2baf | Iustin Pop | |
14 | e2fa2baf | Iustin Pop | This program is distributed in the hope that it will be useful, but |
15 | e2fa2baf | Iustin Pop | WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | e2fa2baf | Iustin Pop | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
17 | e2fa2baf | Iustin Pop | General Public License for more details. |
18 | e2fa2baf | Iustin Pop | |
19 | e2fa2baf | Iustin Pop | You should have received a copy of the GNU General Public License |
20 | e2fa2baf | Iustin Pop | along with this program; if not, write to the Free Software |
21 | e2fa2baf | Iustin Pop | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
22 | e2fa2baf | Iustin Pop | 02110-1301, USA. |
23 | e2fa2baf | Iustin Pop | |
24 | e2fa2baf | Iustin Pop | -} |
25 | e2fa2baf | Iustin Pop | |
26 | c478f837 | Iustin Pop | {-# LANGUAGE BangPatterns, CPP #-} |
27 | c9224fa4 | Iustin Pop | |
28 | 669d7e3d | Iustin Pop | module Ganeti.HTools.Rapi |
29 | dd4c56ed | Iustin Pop | ( |
30 | 040afc35 | Iustin Pop | loadData |
31 | 748bfcc2 | Iustin Pop | , parseData |
32 | dd4c56ed | Iustin Pop | ) where |
33 | a7654563 | Iustin Pop | |
34 | 3986684e | Iustin Pop | import Data.Maybe (fromMaybe) |
35 | c478f837 | Iustin Pop | #ifndef NO_CURL |
36 | a7654563 | Iustin Pop | import Network.Curl |
37 | b8b9a53c | Iustin Pop | import Network.Curl.Types () |
38 | c478f837 | Iustin Pop | #endif |
39 | a7654563 | Iustin Pop | import Control.Monad |
40 | 28f19313 | Iustin Pop | import Text.JSON (JSObject, fromJSObject, decodeStrict) |
41 | 6402a260 | Iustin Pop | import Text.JSON.Types (JSValue(..)) |
42 | a7654563 | Iustin Pop | import Text.Printf (printf) |
43 | 040afc35 | Iustin Pop | |
44 | 9ba5c28f | Iustin Pop | import Ganeti.HTools.Utils |
45 | 040afc35 | Iustin Pop | import Ganeti.HTools.Loader |
46 | e4c5beaf | Iustin Pop | import Ganeti.HTools.Types |
47 | a679e9dc | Iustin Pop | import qualified Ganeti.HTools.Group as Group |
48 | 040afc35 | Iustin Pop | import qualified Ganeti.HTools.Node as Node |
49 | 040afc35 | Iustin Pop | import qualified Ganeti.HTools.Instance as Instance |
50 | a69ff623 | Iustin Pop | import qualified Ganeti.Constants as C |
51 | a7654563 | Iustin Pop | |
52 | c478f837 | Iustin Pop | -- | Read an URL via curl and return the body if successful. |
53 | c478f837 | Iustin Pop | getUrl :: (Monad m) => String -> IO (m String) |
54 | c478f837 | Iustin Pop | |
55 | c478f837 | Iustin Pop | #ifdef NO_CURL |
56 | c478f837 | Iustin Pop | getUrl _ = return $ fail "RAPI/curl backend disabled at compile time" |
57 | c478f837 | Iustin Pop | |
58 | c478f837 | Iustin Pop | #else |
59 | c478f837 | Iustin Pop | |
60 | 525bfb36 | Iustin Pop | -- | The curl options we use. |
61 | 4d8e5008 | Iustin Pop | curlOpts :: [CurlOption] |
62 | 4d8e5008 | Iustin Pop | curlOpts = [ CurlSSLVerifyPeer False |
63 | 4d8e5008 | Iustin Pop | , CurlSSLVerifyHost 0 |
64 | 4d8e5008 | Iustin Pop | , CurlTimeout (fromIntegral queryTimeout) |
65 | 4d8e5008 | Iustin Pop | , CurlConnectTimeout (fromIntegral connTimeout) |
66 | 4d8e5008 | Iustin Pop | ] |
67 | 4d8e5008 | Iustin Pop | |
68 | a7654563 | Iustin Pop | getUrl url = do |
69 | c9224fa4 | Iustin Pop | (code, !body) <- curlGetString url curlOpts |
70 | a7654563 | Iustin Pop | return (case code of |
71 | ba00ad4d | Iustin Pop | CurlOK -> return body |
72 | ba00ad4d | Iustin Pop | _ -> fail $ printf "Curl error for '%s', error %s" |
73 | aab26f2d | Iustin Pop | url (show code)) |
74 | c478f837 | Iustin Pop | #endif |
75 | aab26f2d | Iustin Pop | |
76 | 9188aeef | Iustin Pop | -- | Append the default port if not passed in. |
77 | e015b554 | Iustin Pop | formatHost :: String -> String |
78 | e015b554 | Iustin Pop | formatHost master = |
79 | 5182e970 | Iustin Pop | if ':' `elem` master then master |
80 | a69ff623 | Iustin Pop | else "https://" ++ master ++ ":" ++ show C.defaultRapiPort |
81 | e015b554 | Iustin Pop | |
82 | 9188aeef | Iustin Pop | -- | Parse a instance list in JSON format. |
83 | 040afc35 | Iustin Pop | getInstances :: NameAssoc |
84 | 040afc35 | Iustin Pop | -> String |
85 | 040afc35 | Iustin Pop | -> Result [(String, Instance.Instance)] |
86 | 262f3e6c | Iustin Pop | getInstances ktn body = |
87 | c8b662f1 | Iustin Pop | loadJSArray "Parsing instance data" body >>= |
88 | c8b662f1 | Iustin Pop | mapM (parseInstance ktn . fromJSObject) |
89 | a7654563 | Iustin Pop | |
90 | 9188aeef | Iustin Pop | -- | Parse a node list in JSON format. |
91 | 10ef6b4e | Iustin Pop | getNodes :: NameAssoc -> String -> Result [(String, Node.Node)] |
92 | 10ef6b4e | Iustin Pop | getNodes ktg body = loadJSArray "Parsing node data" body >>= |
93 | 10ef6b4e | Iustin Pop | mapM (parseNode ktg . fromJSObject) |
94 | a7654563 | Iustin Pop | |
95 | a679e9dc | Iustin Pop | -- | Parse a group list in JSON format. |
96 | a679e9dc | Iustin Pop | getGroups :: String -> Result [(String, Group.Group)] |
97 | a679e9dc | Iustin Pop | getGroups body = loadJSArray "Parsing group data" body >>= |
98 | a679e9dc | Iustin Pop | mapM (parseGroup . fromJSObject) |
99 | a679e9dc | Iustin Pop | |
100 | 9188aeef | Iustin Pop | -- | Construct an instance from a JSON object. |
101 | 6ff78049 | Iustin Pop | parseInstance :: NameAssoc |
102 | 28f19313 | Iustin Pop | -> JSRecord |
103 | 040afc35 | Iustin Pop | -> Result (String, Instance.Instance) |
104 | 040afc35 | Iustin Pop | parseInstance ktn a = do |
105 | 117dc2d8 | Iustin Pop | name <- tryFromObj "Parsing new instance" a "name" |
106 | 6a062ff9 | Iustin Pop | let owner_name = "Instance '" ++ name ++ "', error while parsing data" |
107 | 6402a260 | Iustin Pop | let extract s x = tryFromObj owner_name x s |
108 | 117dc2d8 | Iustin Pop | disk <- extract "disk_usage" a |
109 | 117dc2d8 | Iustin Pop | beparams <- liftM fromJSObject (extract "beparams" a) |
110 | 6402a260 | Iustin Pop | omem <- extract "oper_ram" a |
111 | 6402a260 | Iustin Pop | mem <- (case omem of |
112 | 6402a260 | Iustin Pop | JSRational _ _ -> annotateResult owner_name (fromJVal omem) |
113 | 6402a260 | Iustin Pop | _ -> extract "memory" beparams) |
114 | 117dc2d8 | Iustin Pop | vcpus <- extract "vcpus" beparams |
115 | 117dc2d8 | Iustin Pop | pnode <- extract "pnode" a >>= lookupNode ktn name |
116 | 117dc2d8 | Iustin Pop | snodes <- extract "snodes" a |
117 | 040afc35 | Iustin Pop | snode <- (if null snodes then return Node.noSecondary |
118 | 040afc35 | Iustin Pop | else readEitherString (head snodes) >>= lookupNode ktn name) |
119 | 117dc2d8 | Iustin Pop | running <- extract "status" a |
120 | 17e7af2b | Iustin Pop | tags <- extract "tags" a |
121 | a041ebb5 | Iustin Pop | auto_balance <- extract "auto_balance" beparams |
122 | 5a4a3b7f | Iustin Pop | dt <- extract "disk_template" a |
123 | a041ebb5 | Iustin Pop | let inst = Instance.create name mem disk vcpus running tags |
124 | 5a4a3b7f | Iustin Pop | auto_balance pnode snode dt |
125 | 040afc35 | Iustin Pop | return (name, inst) |
126 | a7654563 | Iustin Pop | |
127 | 9188aeef | Iustin Pop | -- | Construct a node from a JSON object. |
128 | 28f19313 | Iustin Pop | parseNode :: NameAssoc -> JSRecord -> Result (String, Node.Node) |
129 | 10ef6b4e | Iustin Pop | parseNode ktg a = do |
130 | 117dc2d8 | Iustin Pop | name <- tryFromObj "Parsing new node" a "name" |
131 | 6a062ff9 | Iustin Pop | let desc = "Node '" ++ name ++ "', error while parsing data" |
132 | 3986684e | Iustin Pop | extract s = tryFromObj desc a s |
133 | 117dc2d8 | Iustin Pop | offline <- extract "offline" |
134 | b45222ce | Iustin Pop | drained <- extract "drained" |
135 | 3986684e | Iustin Pop | vm_cap <- annotateResult desc $ maybeFromObj a "vm_capable" |
136 | 3986684e | Iustin Pop | let vm_cap' = fromMaybe True vm_cap |
137 | 3986684e | Iustin Pop | guuid <- annotateResult desc $ maybeFromObj a "group.uuid" |
138 | 3986684e | Iustin Pop | guuid' <- lookupGroup ktg name (fromMaybe defaultGroupID guuid) |
139 | 3986684e | Iustin Pop | node <- (if offline || drained || not vm_cap' |
140 | 3986684e | Iustin Pop | then return $ Node.create name 0 0 0 0 0 0 True guuid' |
141 | 262f3e6c | Iustin Pop | else do |
142 | 117dc2d8 | Iustin Pop | mtotal <- extract "mtotal" |
143 | 117dc2d8 | Iustin Pop | mnode <- extract "mnode" |
144 | 117dc2d8 | Iustin Pop | mfree <- extract "mfree" |
145 | 117dc2d8 | Iustin Pop | dtotal <- extract "dtotal" |
146 | 117dc2d8 | Iustin Pop | dfree <- extract "dfree" |
147 | 117dc2d8 | Iustin Pop | ctotal <- extract "ctotal" |
148 | 262f3e6c | Iustin Pop | return $ Node.create name mtotal mnode mfree |
149 | 3986684e | Iustin Pop | dtotal dfree ctotal False guuid') |
150 | 262f3e6c | Iustin Pop | return (name, node) |
151 | 00b15752 | Iustin Pop | |
152 | a679e9dc | Iustin Pop | -- | Construct a group from a JSON object. |
153 | 28f19313 | Iustin Pop | parseGroup :: JSRecord -> Result (String, Group.Group) |
154 | a679e9dc | Iustin Pop | parseGroup a = do |
155 | a679e9dc | Iustin Pop | name <- tryFromObj "Parsing new group" a "name" |
156 | a679e9dc | Iustin Pop | let extract s = tryFromObj ("Group '" ++ name ++ "'") a s |
157 | a679e9dc | Iustin Pop | uuid <- extract "uuid" |
158 | 2ddabf4f | Iustin Pop | apol <- extract "alloc_policy" |
159 | 2ddabf4f | Iustin Pop | return (uuid, Group.create name uuid apol) |
160 | a679e9dc | Iustin Pop | |
161 | 748bfcc2 | Iustin Pop | -- | Loads the raw cluster data from an URL. |
162 | 748bfcc2 | Iustin Pop | readData :: String -- ^ Cluster or URL to use as source |
163 | a679e9dc | Iustin Pop | -> IO (Result String, Result String, Result String, Result String) |
164 | 748bfcc2 | Iustin Pop | readData master = do |
165 | 040afc35 | Iustin Pop | let url = formatHost master |
166 | a679e9dc | Iustin Pop | group_body <- getUrl $ printf "%s/2/groups?bulk=1" url |
167 | 040afc35 | Iustin Pop | node_body <- getUrl $ printf "%s/2/nodes?bulk=1" url |
168 | 040afc35 | Iustin Pop | inst_body <- getUrl $ printf "%s/2/instances?bulk=1" url |
169 | ea017cbc | Iustin Pop | tags_body <- getUrl $ printf "%s/2/tags" url |
170 | a679e9dc | Iustin Pop | return (group_body, node_body, inst_body, tags_body) |
171 | 748bfcc2 | Iustin Pop | |
172 | 525bfb36 | Iustin Pop | -- | Builds the cluster data from the raw Rapi content. |
173 | a679e9dc | Iustin Pop | parseData :: (Result String, Result String, Result String, Result String) |
174 | f4f6eb0b | Iustin Pop | -> Result ClusterData |
175 | a679e9dc | Iustin Pop | parseData (group_body, node_body, inst_body, tags_body) = do |
176 | 3667467d | Iustin Pop | group_data <- group_body >>= getGroups |
177 | 10ef6b4e | Iustin Pop | let (group_names, group_idx) = assignIndices group_data |
178 | 10ef6b4e | Iustin Pop | node_data <- node_body >>= getNodes group_names |
179 | 748bfcc2 | Iustin Pop | let (node_names, node_idx) = assignIndices node_data |
180 | 748bfcc2 | Iustin Pop | inst_data <- inst_body >>= getInstances node_names |
181 | 748bfcc2 | Iustin Pop | let (_, inst_idx) = assignIndices inst_data |
182 | 748bfcc2 | Iustin Pop | tags_data <- tags_body >>= (fromJResult "Parsing tags data" . decodeStrict) |
183 | f4f6eb0b | Iustin Pop | return (ClusterData group_idx node_idx inst_idx tags_data) |
184 | 748bfcc2 | Iustin Pop | |
185 | 525bfb36 | Iustin Pop | -- | Top level function for data loading. |
186 | 748bfcc2 | Iustin Pop | loadData :: String -- ^ Cluster or URL to use as source |
187 | f4f6eb0b | Iustin Pop | -> IO (Result ClusterData) |
188 | 2a8e2dc9 | Iustin Pop | loadData = fmap parseData . readData |