-}
+{-
+
+Copyright (C) 2009 Google Inc.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA.
+
+-}
+
module Ganeti.HTools.Rapi
(
loadData
import Network.Curl.Code
import Data.List
import Control.Monad
-import Text.JSON (JSObject, JSValue)
+import Text.JSON (JSObject, JSValue, fromJSObject, decodeStrict)
+import Text.JSON.Types (JSValue(..))
import Text.Printf (printf)
import Ganeti.HTools.Utils
import qualified Ganeti.HTools.Node as Node
import qualified Ganeti.HTools.Instance as Instance
--- | Read an URL via curl and return the body if successful
+-- | Read an URL via curl and return the body if successful.
getUrl :: (Monad m) => String -> IO (m String)
getUrl url = do
(code, body) <- curlGetString url [CurlSSLVerifyPeer False,
- CurlSSLVerifyHost 0]
+ CurlSSLVerifyHost 0,
+ CurlTimeout (fromIntegral queryTimeout),
+ CurlConnectTimeout
+ (fromIntegral connTimeout)]
return (case code of
CurlOK -> return body
_ -> fail $ printf "Curl error for '%s', error %s"
url (show code))
--- | Append the default port if not passed in
+-- | Append the default port if not passed in.
formatHost :: String -> String
formatHost master =
if elem ':' master then master
else "https://" ++ master ++ ":5080"
+-- | Parse a instance list in JSON format.
getInstances :: NameAssoc
-> String
-> Result [(String, Instance.Instance)]
-getInstances ktn body = do
- arr <- loadJSArray body
- ilist <- mapM (parseInstance ktn) arr
- return ilist
+getInstances ktn body =
+ loadJSArray body >>= mapM (parseInstance ktn . fromJSObject)
+-- | Parse a node list in JSON format.
getNodes :: String -> Result [(String, Node.Node)]
-getNodes body = do
- arr <- loadJSArray body
- nlist <- mapM parseNode arr
- return nlist
+getNodes body = loadJSArray body >>= mapM (parseNode . fromJSObject)
+-- | Construct an instance from a JSON object.
parseInstance :: [(String, Ndx)]
- -> JSObject JSValue
+ -> [(String, JSValue)]
-> Result (String, Instance.Instance)
parseInstance ktn a = do
- name <- fromObj "name" a
- disk <- fromObj "disk_usage" a
- mem <- fromObj "beparams" a >>= fromObj "memory"
- pnode <- fromObj "pnode" a >>= lookupNode ktn name
- snodes <- fromObj "snodes" a
+ name <- tryFromObj "Parsing new instance" a "name"
+ let owner_name = "Instance '" ++ name ++ "'"
+ let extract s x = tryFromObj owner_name x s
+ disk <- extract "disk_usage" a
+ beparams <- liftM fromJSObject (extract "beparams" a)
+ omem <- extract "oper_ram" a
+ mem <- (case omem of
+ JSRational _ _ -> annotateResult owner_name (fromJVal omem)
+ _ -> extract "memory" beparams)
+ vcpus <- extract "vcpus" beparams
+ pnode <- extract "pnode" a >>= lookupNode ktn name
+ snodes <- extract "snodes" a
snode <- (if null snodes then return Node.noSecondary
else readEitherString (head snodes) >>= lookupNode ktn name)
- running <- fromObj "status" a
- let inst = Instance.create name mem disk running pnode snode
+ running <- extract "status" a
+ tags <- extract "tags" a
+ let inst = Instance.create name mem disk vcpus running tags pnode snode
return (name, inst)
-parseNode :: JSObject JSValue -> Result (String, Node.Node)
+-- | Construct a node from a JSON object.
+parseNode :: [(String, JSValue)] -> Result (String, Node.Node)
parseNode a = do
- name <- fromObj "name" a
- offline <- fromObj "offline" a
- node <- (case offline of
- True -> return $ Node.create name 0 0 0 0 0 True
- _ -> do
- drained <- fromObj "drained" a
- mtotal <- fromObj "mtotal" a
- mnode <- fromObj "mnode" a
- mfree <- fromObj "mfree" a
- dtotal <- fromObj "dtotal" a
- dfree <- fromObj "dfree" a
- return $ Node.create name mtotal mnode mfree
- dtotal dfree (offline || drained))
- return (name, node)
+ name <- tryFromObj "Parsing new node" a "name"
+ let extract s = tryFromObj ("Node '" ++ name ++ "'") a s
+ offline <- extract "offline"
+ drained <- extract "drained"
+ node <- (if offline || drained
+ then return $ Node.create name 0 0 0 0 0 0 True
+ else do
+ mtotal <- extract "mtotal"
+ mnode <- extract "mnode"
+ mfree <- extract "mfree"
+ dtotal <- extract "dtotal"
+ dfree <- extract "dfree"
+ ctotal <- extract "ctotal"
+ return $ Node.create name mtotal mnode mfree
+ dtotal dfree ctotal False)
+ return (name, node)
+-- | Builds the cluster data from an URL.
loadData :: String -- ^ Cluster or URL to use as source
- -> IO (Result (Node.AssocList, Instance.AssocList))
+ -> IO (Result (Node.AssocList, Instance.AssocList, [String]))
loadData master = do -- IO monad
let url = formatHost master
node_body <- getUrl $ printf "%s/2/nodes?bulk=1" url
inst_body <- getUrl $ printf "%s/2/instances?bulk=1" url
+ tags_body <- getUrl $ printf "%s/2/tags" url
return $ do -- Result monad
node_data <- node_body >>= getNodes
let (node_names, node_idx) = assignIndices node_data
inst_data <- inst_body >>= getInstances node_names
let (_, inst_idx) = assignIndices inst_data
- return (node_idx, inst_idx)
+ tags_data <- tags_body >>= (fromJResult . decodeStrict)
+ return (node_idx, inst_idx, tags_data)