root / Ganeti / HTools / Rapi.hs @ f9fc7a63
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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 | 669d7e3d | Iustin Pop | module Ganeti.HTools.Rapi |
6 | dd4c56ed | Iustin Pop | ( |
7 | 040afc35 | Iustin Pop | loadData |
8 | dd4c56ed | Iustin Pop | ) where |
9 | a7654563 | Iustin Pop | |
10 | a7654563 | Iustin Pop | import Network.Curl |
11 | b8b9a53c | Iustin Pop | import Network.Curl.Types () |
12 | a7654563 | Iustin Pop | import Network.Curl.Code |
13 | e015b554 | Iustin Pop | import Data.List |
14 | a7654563 | Iustin Pop | import Control.Monad |
15 | 942403e6 | Iustin Pop | import Text.JSON (JSObject, JSValue) |
16 | a7654563 | Iustin Pop | import Text.Printf (printf) |
17 | 040afc35 | Iustin Pop | |
18 | 9ba5c28f | Iustin Pop | import Ganeti.HTools.Utils |
19 | 040afc35 | Iustin Pop | import Ganeti.HTools.Loader |
20 | e4c5beaf | Iustin Pop | import Ganeti.HTools.Types |
21 | 040afc35 | Iustin Pop | import qualified Ganeti.HTools.Node as Node |
22 | 040afc35 | Iustin Pop | import qualified Ganeti.HTools.Instance as Instance |
23 | a7654563 | Iustin Pop | |
24 | ba00ad4d | Iustin Pop | -- | Read an URL via curl and return the body if successful |
25 | ba00ad4d | Iustin Pop | getUrl :: (Monad m) => String -> IO (m String) |
26 | a7654563 | Iustin Pop | getUrl url = do |
27 | a7654563 | Iustin Pop | (code, body) <- curlGetString url [CurlSSLVerifyPeer False, |
28 | a7654563 | Iustin Pop | CurlSSLVerifyHost 0] |
29 | a7654563 | Iustin Pop | return (case code of |
30 | ba00ad4d | Iustin Pop | CurlOK -> return body |
31 | ba00ad4d | Iustin Pop | _ -> fail $ printf "Curl error for '%s', error %s" |
32 | aab26f2d | Iustin Pop | url (show code)) |
33 | aab26f2d | Iustin Pop | |
34 | e015b554 | Iustin Pop | -- | Append the default port if not passed in |
35 | e015b554 | Iustin Pop | formatHost :: String -> String |
36 | e015b554 | Iustin Pop | formatHost master = |
37 | e015b554 | Iustin Pop | if elem ':' master then master |
38 | e015b554 | Iustin Pop | else "https://" ++ master ++ ":5080" |
39 | e015b554 | Iustin Pop | |
40 | 040afc35 | Iustin Pop | getInstances :: NameAssoc |
41 | 040afc35 | Iustin Pop | -> String |
42 | 040afc35 | Iustin Pop | -> Result [(String, Instance.Instance)] |
43 | 040afc35 | Iustin Pop | getInstances ktn body = do |
44 | 040afc35 | Iustin Pop | arr <- loadJSArray body |
45 | 040afc35 | Iustin Pop | ilist <- mapM (parseInstance ktn) arr |
46 | 040afc35 | Iustin Pop | return ilist |
47 | a7654563 | Iustin Pop | |
48 | 040afc35 | Iustin Pop | getNodes :: String -> Result [(String, Node.Node)] |
49 | 040afc35 | Iustin Pop | getNodes body = do |
50 | 040afc35 | Iustin Pop | arr <- loadJSArray body |
51 | 040afc35 | Iustin Pop | nlist <- mapM parseNode arr |
52 | 040afc35 | Iustin Pop | return nlist |
53 | a7654563 | Iustin Pop | |
54 | 608efcce | Iustin Pop | parseInstance :: [(String, Ndx)] |
55 | 040afc35 | Iustin Pop | -> JSObject JSValue |
56 | 040afc35 | Iustin Pop | -> Result (String, Instance.Instance) |
57 | 040afc35 | Iustin Pop | parseInstance ktn a = do |
58 | 040afc35 | Iustin Pop | name <- fromObj "name" a |
59 | 040afc35 | Iustin Pop | disk <- fromObj "disk_usage" a |
60 | 040afc35 | Iustin Pop | mem <- fromObj "beparams" a >>= fromObj "memory" |
61 | 040afc35 | Iustin Pop | pnode <- fromObj "pnode" a >>= lookupNode ktn name |
62 | e4c5beaf | Iustin Pop | snodes <- fromObj "snodes" a |
63 | 040afc35 | Iustin Pop | snode <- (if null snodes then return Node.noSecondary |
64 | 040afc35 | Iustin Pop | else readEitherString (head snodes) >>= lookupNode ktn name) |
65 | 040afc35 | Iustin Pop | running <- fromObj "status" a |
66 | 2727257a | Iustin Pop | let inst = Instance.create name mem disk running pnode snode |
67 | 040afc35 | Iustin Pop | return (name, inst) |
68 | a7654563 | Iustin Pop | |
69 | 040afc35 | Iustin Pop | parseNode :: JSObject JSValue -> Result (String, Node.Node) |
70 | 040afc35 | Iustin Pop | parseNode a = do |
71 | 040afc35 | Iustin Pop | name <- fromObj "name" a |
72 | 040afc35 | Iustin Pop | offline <- fromObj "offline" a |
73 | 040afc35 | Iustin Pop | node <- (case offline of |
74 | 2727257a | Iustin Pop | True -> return $ Node.create name 0 0 0 0 0 True |
75 | 040afc35 | Iustin Pop | _ -> do |
76 | 040afc35 | Iustin Pop | drained <- fromObj "drained" a |
77 | 040afc35 | Iustin Pop | mtotal <- fromObj "mtotal" a |
78 | 040afc35 | Iustin Pop | mnode <- fromObj "mnode" a |
79 | 040afc35 | Iustin Pop | mfree <- fromObj "mfree" a |
80 | 040afc35 | Iustin Pop | dtotal <- fromObj "dtotal" a |
81 | 040afc35 | Iustin Pop | dfree <- fromObj "dfree" a |
82 | 2727257a | Iustin Pop | return $ Node.create name mtotal mnode mfree |
83 | 040afc35 | Iustin Pop | dtotal dfree (offline || drained)) |
84 | 040afc35 | Iustin Pop | return (name, node) |
85 | 00b15752 | Iustin Pop | |
86 | a8946537 | Iustin Pop | loadData :: String -- ^ Cluster or URL to use as source |
87 | e3a684c5 | Iustin Pop | -> IO (Result (Node.AssocList, Instance.AssocList)) |
88 | 040afc35 | Iustin Pop | loadData master = do -- IO monad |
89 | 040afc35 | Iustin Pop | let url = formatHost master |
90 | 040afc35 | Iustin Pop | node_body <- getUrl $ printf "%s/2/nodes?bulk=1" url |
91 | 040afc35 | Iustin Pop | inst_body <- getUrl $ printf "%s/2/instances?bulk=1" url |
92 | 040afc35 | Iustin Pop | return $ do -- Result monad |
93 | 040afc35 | Iustin Pop | node_data <- node_body >>= getNodes |
94 | 497e30a1 | Iustin Pop | let (node_names, node_idx) = assignIndices node_data |
95 | 040afc35 | Iustin Pop | inst_data <- inst_body >>= getInstances node_names |
96 | e3a684c5 | Iustin Pop | let (_, inst_idx) = assignIndices inst_data |
97 | e3a684c5 | Iustin Pop | return (node_idx, inst_idx) |