root / Ganeti / HTools / Rapi.hs @ ee9724b9
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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 | e2fa2baf | Iustin Pop | Copyright (C) 2009 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 | 669d7e3d | Iustin Pop | module Ganeti.HTools.Rapi |
27 | dd4c56ed | Iustin Pop | ( |
28 | 040afc35 | Iustin Pop | loadData |
29 | dd4c56ed | Iustin Pop | ) where |
30 | a7654563 | Iustin Pop | |
31 | a7654563 | Iustin Pop | import Network.Curl |
32 | b8b9a53c | Iustin Pop | import Network.Curl.Types () |
33 | a7654563 | Iustin Pop | import Network.Curl.Code |
34 | e015b554 | Iustin Pop | import Data.List |
35 | a7654563 | Iustin Pop | import Control.Monad |
36 | 942403e6 | Iustin Pop | import Text.JSON (JSObject, JSValue) |
37 | a7654563 | Iustin Pop | import Text.Printf (printf) |
38 | 040afc35 | Iustin Pop | |
39 | 9ba5c28f | Iustin Pop | import Ganeti.HTools.Utils |
40 | 040afc35 | Iustin Pop | import Ganeti.HTools.Loader |
41 | e4c5beaf | Iustin Pop | import Ganeti.HTools.Types |
42 | 040afc35 | Iustin Pop | import qualified Ganeti.HTools.Node as Node |
43 | 040afc35 | Iustin Pop | import qualified Ganeti.HTools.Instance as Instance |
44 | a7654563 | Iustin Pop | |
45 | 9188aeef | Iustin Pop | -- | Read an URL via curl and return the body if successful. |
46 | ba00ad4d | Iustin Pop | getUrl :: (Monad m) => String -> IO (m String) |
47 | a7654563 | Iustin Pop | getUrl url = do |
48 | a7654563 | Iustin Pop | (code, body) <- curlGetString url [CurlSSLVerifyPeer False, |
49 | 135a6c6a | Iustin Pop | CurlSSLVerifyHost 0, |
50 | 135a6c6a | Iustin Pop | CurlTimeout (fromIntegral queryTimeout), |
51 | 135a6c6a | Iustin Pop | CurlConnectTimeout |
52 | 135a6c6a | Iustin Pop | (fromIntegral connTimeout)] |
53 | a7654563 | Iustin Pop | return (case code of |
54 | ba00ad4d | Iustin Pop | CurlOK -> return body |
55 | ba00ad4d | Iustin Pop | _ -> fail $ printf "Curl error for '%s', error %s" |
56 | aab26f2d | Iustin Pop | url (show code)) |
57 | aab26f2d | Iustin Pop | |
58 | 9188aeef | Iustin Pop | -- | Append the default port if not passed in. |
59 | e015b554 | Iustin Pop | formatHost :: String -> String |
60 | e015b554 | Iustin Pop | formatHost master = |
61 | e015b554 | Iustin Pop | if elem ':' master then master |
62 | e015b554 | Iustin Pop | else "https://" ++ master ++ ":5080" |
63 | e015b554 | Iustin Pop | |
64 | 9188aeef | Iustin Pop | -- | Parse a instance list in JSON format. |
65 | 040afc35 | Iustin Pop | getInstances :: NameAssoc |
66 | 040afc35 | Iustin Pop | -> String |
67 | 040afc35 | Iustin Pop | -> Result [(String, Instance.Instance)] |
68 | 9f6dcdea | Iustin Pop | getInstances ktn body = loadJSArray body >>= mapM (parseInstance ktn) |
69 | a7654563 | Iustin Pop | |
70 | 9188aeef | Iustin Pop | -- | Parse a node list in JSON format. |
71 | 040afc35 | Iustin Pop | getNodes :: String -> Result [(String, Node.Node)] |
72 | 9f6dcdea | Iustin Pop | getNodes body = loadJSArray body >>= mapM parseNode |
73 | a7654563 | Iustin Pop | |
74 | 9188aeef | Iustin Pop | -- | Construct an instance from a JSON object. |
75 | 608efcce | Iustin Pop | parseInstance :: [(String, Ndx)] |
76 | 040afc35 | Iustin Pop | -> JSObject JSValue |
77 | 040afc35 | Iustin Pop | -> Result (String, Instance.Instance) |
78 | 040afc35 | Iustin Pop | parseInstance ktn a = do |
79 | 040afc35 | Iustin Pop | name <- fromObj "name" a |
80 | 040afc35 | Iustin Pop | disk <- fromObj "disk_usage" a |
81 | 040afc35 | Iustin Pop | mem <- fromObj "beparams" a >>= fromObj "memory" |
82 | d752eb39 | Iustin Pop | vcpus <- fromObj "beparams" a >>= fromObj "vcpus" |
83 | 040afc35 | Iustin Pop | pnode <- fromObj "pnode" a >>= lookupNode ktn name |
84 | e4c5beaf | Iustin Pop | snodes <- fromObj "snodes" a |
85 | 040afc35 | Iustin Pop | snode <- (if null snodes then return Node.noSecondary |
86 | 040afc35 | Iustin Pop | else readEitherString (head snodes) >>= lookupNode ktn name) |
87 | 040afc35 | Iustin Pop | running <- fromObj "status" a |
88 | d752eb39 | Iustin Pop | let inst = Instance.create name mem disk vcpus running pnode snode |
89 | 040afc35 | Iustin Pop | return (name, inst) |
90 | a7654563 | Iustin Pop | |
91 | 9188aeef | Iustin Pop | -- | Construct a node from a JSON object. |
92 | 040afc35 | Iustin Pop | parseNode :: JSObject JSValue -> Result (String, Node.Node) |
93 | 040afc35 | Iustin Pop | parseNode a = do |
94 | 040afc35 | Iustin Pop | name <- fromObj "name" a |
95 | 040afc35 | Iustin Pop | offline <- fromObj "offline" a |
96 | 9f6dcdea | Iustin Pop | node <- (if offline |
97 | 9f6dcdea | Iustin Pop | then return $ Node.create name 0 0 0 0 0 0 True |
98 | 9f6dcdea | Iustin Pop | else do |
99 | 9f6dcdea | Iustin Pop | drained <- fromObj "drained" a |
100 | 9f6dcdea | Iustin Pop | mtotal <- fromObj "mtotal" a |
101 | 9f6dcdea | Iustin Pop | mnode <- fromObj "mnode" a |
102 | 9f6dcdea | Iustin Pop | mfree <- fromObj "mfree" a |
103 | 9f6dcdea | Iustin Pop | dtotal <- fromObj "dtotal" a |
104 | 9f6dcdea | Iustin Pop | dfree <- fromObj "dfree" a |
105 | 9f6dcdea | Iustin Pop | ctotal <- fromObj "ctotal" a |
106 | 9f6dcdea | Iustin Pop | return $ Node.create name mtotal mnode mfree |
107 | 9f6dcdea | Iustin Pop | dtotal dfree ctotal (offline || drained)) |
108 | 040afc35 | Iustin Pop | return (name, node) |
109 | 00b15752 | Iustin Pop | |
110 | 9188aeef | Iustin Pop | -- | Builds the cluster data from an URL. |
111 | a8946537 | Iustin Pop | loadData :: String -- ^ Cluster or URL to use as source |
112 | e3a684c5 | Iustin Pop | -> IO (Result (Node.AssocList, Instance.AssocList)) |
113 | 040afc35 | Iustin Pop | loadData master = do -- IO monad |
114 | 040afc35 | Iustin Pop | let url = formatHost master |
115 | 040afc35 | Iustin Pop | node_body <- getUrl $ printf "%s/2/nodes?bulk=1" url |
116 | 040afc35 | Iustin Pop | inst_body <- getUrl $ printf "%s/2/instances?bulk=1" url |
117 | 040afc35 | Iustin Pop | return $ do -- Result monad |
118 | 040afc35 | Iustin Pop | node_data <- node_body >>= getNodes |
119 | 497e30a1 | Iustin Pop | let (node_names, node_idx) = assignIndices node_data |
120 | 040afc35 | Iustin Pop | inst_data <- inst_body >>= getInstances node_names |
121 | e3a684c5 | Iustin Pop | let (_, inst_idx) = assignIndices inst_data |
122 | e3a684c5 | Iustin Pop | return (node_idx, inst_idx) |