-}
+{-
+
+Copyright (C) 2009, 2010 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
(
- getNodes
- , getInstances
+ loadData
+ , parseData
) where
import Network.Curl
import Network.Curl.Types ()
-import Network.Curl.Code
-import Data.Either ()
-import Data.Maybe
-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 Ganeti.HTools.Loader
+import Ganeti.HTools.Types
+import qualified Ganeti.HTools.Group as Group
+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
+ if ':' `elem` master then master
else "https://" ++ master ++ ":5080"
-getInstances :: String -> IO (Result String)
-getInstances master = do
- let url2 = printf "%s/2/instances?bulk=1" (formatHost master)
- body <- getUrl url2
- return $ (do x <- body
- arr <- loadJSArray x
- ilist <- mapM parseInstance arr
- return $ unlines ilist)
-
-getNodes :: String -> IO (Result String)
-getNodes master = do
- let url2 = printf "%s/2/nodes?bulk=1" (formatHost master)
- body <- getUrl url2
- return $ (do x <- body
- arr <- loadJSArray x
- nlist <- mapM parseNode arr
- return $ unlines nlist)
-
-parseInstance :: JSObject JSValue -> Result String
-parseInstance a =
- let name = getStringElement "name" a
- disk = getIntElement "disk_usage" a
- mem = getObjectElement "beparams" a >>= getIntElement "memory"
- pnode = getStringElement "pnode" a
- snode = (liftM head $ getListElement "snodes" a) >>= readEitherString
- running = getStringElement "status" a
- in
- name |+ (show `liftM` mem) |+
- (show `liftM` disk) |+
- running |+ pnode |+ snode
-
-boolToYN :: (Monad m) => Bool -> m String
-boolToYN True = return "Y"
-boolToYN _ = return "N"
-
-parseNode :: JSObject JSValue -> Result String
-parseNode a =
- let name = getStringElement "name" a
- offline = getBoolElement "offline" a
- drained = getBoolElement "drained" a
- mtotal = getIntElement "mtotal" a
- mnode = getIntElement "mnode" a
- mfree = getIntElement "mfree" a
- dtotal = getIntElement "dtotal" a
- dfree = getIntElement "dfree" a
- in name |+
- (case offline of
- Ok True -> Ok "0|0|0|0|0|Y"
- _ ->
- (show `liftM` mtotal) |+ (show `liftM` mnode) |+
- (show `liftM` mfree) |+ (show `liftM` dtotal) |+
- (show `liftM` dfree) |+
- ((liftM2 (||) offline drained) >>= boolToYN)
- )
+-- | Parse a instance list in JSON format.
+getInstances :: NameAssoc
+ -> String
+ -> Result [(String, Instance.Instance)]
+getInstances ktn body =
+ loadJSArray "Parsing instance data" body >>=
+ mapM (parseInstance ktn . fromJSObject)
+
+-- | Parse a node list in JSON format.
+getNodes :: NameAssoc -> String -> Result [(String, Node.Node)]
+getNodes ktg body = loadJSArray "Parsing node data" body >>=
+ mapM (parseNode ktg . fromJSObject)
+
+-- | Parse a group list in JSON format.
+getGroups :: String -> Result [(String, Group.Group)]
+getGroups body = loadJSArray "Parsing group data" body >>=
+ mapM (parseGroup . fromJSObject)
+
+-- | Construct an instance from a JSON object.
+parseInstance :: NameAssoc
+ -> [(String, JSValue)]
+ -> Result (String, Instance.Instance)
+parseInstance ktn a = do
+ 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 <- extract "status" a
+ tags <- extract "tags" a
+ let inst = Instance.create name mem disk vcpus running tags pnode snode
+ return (name, inst)
+
+-- | Construct a node from a JSON object.
+parseNode :: NameAssoc -> [(String, JSValue)] -> Result (String, Node.Node)
+parseNode ktg a = do
+ name <- tryFromObj "Parsing new node" a "name"
+ let extract s = tryFromObj ("Node '" ++ name ++ "'") a s
+ offline <- extract "offline"
+ drained <- extract "drained"
+ guuid <- extract "group.uuid" >>= lookupGroup ktg name
+ node <- (if offline || drained
+ then return $ Node.create name 0 0 0 0 0 0 True guuid
+ 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 guuid)
+ return (name, node)
+
+-- | Construct a group from a JSON object.
+parseGroup :: [(String, JSValue)] -> Result (String, Group.Group)
+parseGroup a = do
+ name <- tryFromObj "Parsing new group" a "name"
+ let extract s = tryFromObj ("Group '" ++ name ++ "'") a s
+ uuid <- extract "uuid"
+ apol <- extract "alloc_policy"
+ return (uuid, Group.create name uuid apol)
+
+-- | Loads the raw cluster data from an URL.
+readData :: String -- ^ Cluster or URL to use as source
+ -> IO (Result String, Result String, Result String, Result String)
+readData master = do
+ let url = formatHost master
+ group_body <- getUrl $ printf "%s/2/groups?bulk=1" url
+ 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 (group_body, node_body, inst_body, tags_body)
+
+-- | Builds the cluster data from the raw Rapi content
+parseData :: (Result String, Result String, Result String, Result String)
+ -> Result ClusterData
+parseData (group_body, node_body, inst_body, tags_body) = do
+ group_data <- group_body >>= getGroups
+ let (group_names, group_idx) = assignIndices group_data
+ node_data <- node_body >>= getNodes group_names
+ let (node_names, node_idx) = assignIndices node_data
+ inst_data <- inst_body >>= getInstances node_names
+ let (_, inst_idx) = assignIndices inst_data
+ tags_data <- tags_body >>= (fromJResult "Parsing tags data" . decodeStrict)
+ return (ClusterData group_idx node_idx inst_idx tags_data)
+
+-- | Top level function for data loading
+loadData :: String -- ^ Cluster or URL to use as source
+ -> IO (Result ClusterData)
+loadData master = readData master >>= return . parseData
projects / ganeti-local / blobdiff