import Network.Curl.Code
import Data.Either ()
import Data.Maybe
+import Data.List
import Control.Monad
-import Text.JSON
+import Text.JSON (JSObject, JSValue)
import Text.Printf (printf)
import Ganeti.HTools.Utils
-
--- Some constants
-
--- | The fixed drbd overhead per disk (only used with 1.2's sdx_size)
-drbdOverhead = 128
-
-getUrl :: String -> IO (Either String String)
+-- | 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]
return (case code of
- CurlOK -> Right body
- _ -> Left $ printf "Curl error for '%s', error %s"
+ CurlOK -> return body
+ _ -> fail $ printf "Curl error for '%s', error %s"
url (show code))
-getInstances :: String -> IO (Either String String)
+-- | Append the default port if not passed in
+formatHost :: String -> String
+formatHost master =
+ if elem ':' master then master
+ else "https://" ++ master ++ ":5080"
+
+getInstances :: String -> IO (Result String)
getInstances master = do
- let url2 = printf "https://%s:5080/2/instances?bulk=1" master
+ let url2 = printf "%s/2/instances?bulk=1" (formatHost master)
body <- getUrl url2
- let inst = body `combineEithers`
- loadJSArray `combineEithers`
- (parseEitherList parseInstance)
- return inst
+ return $ (do x <- body
+ arr <- loadJSArray x
+ ilist <- mapM parseInstance arr
+ return $ unlines ilist)
-getNodes :: String -> IO (Either String String)
+getNodes :: String -> IO (Result String)
getNodes master = do
- let url2 = printf "https://%s:5080/2/nodes?bulk=1" master
+ let url2 = printf "%s/2/nodes?bulk=1" (formatHost master)
body <- getUrl url2
- let inst = body `combineEithers`
- loadJSArray `combineEithers`
- (parseEitherList parseNode)
- return inst
+ return $ (do x <- body
+ arr <- loadJSArray x
+ nlist <- mapM parseNode arr
+ return $ unlines nlist)
-parseInstance :: JSObject JSValue -> Either String String
+parseInstance :: JSObject JSValue -> Result String
parseInstance a =
let name = getStringElement "name" a
- disk = case getIntElement "disk_usage" a of
- Left _ -> let log_sz = applyEither2 (+)
- (getIntElement "sda_size" a)
- (getIntElement "sdb_size" a)
- in applyEither2 (+) log_sz
- (Right $ drbdOverhead * 2)
- Right x -> Right x
- bep = fromObj "beparams" a
+ disk = getIntElement "disk_usage" a
+ mem = getObjectElement "beparams" a >>= getIntElement "memory"
pnode = getStringElement "pnode" a
- snode = (eitherListHead $ getListElement "snodes" a)
- `combineEithers` readEitherString
- mem = case bep of
- Left _ -> getIntElement "admin_ram" a
- Right o -> getIntElement "memory" o
+ snode = (liftM head $ getListElement "snodes" a) >>= readEitherString
running = getStringElement "status" a
in
- concatEitherElems name $
- concatEitherElems (show `applyEither1` mem) $
- concatEitherElems (show `applyEither1` disk) $
- concatEitherElems running $
- concatEitherElems pnode snode
+ name |+ (show `liftM` mem) |+
+ (show `liftM` disk) |+
+ running |+ pnode |+ snode
-boolToYN :: Bool -> Either String String
-boolToYN True = Right "Y"
-boolToYN _ = Right "N"
+boolToYN :: (Monad m) => Bool -> m String
+boolToYN True = return "Y"
+boolToYN _ = return "N"
-parseNode :: JSObject JSValue -> Either String String
+parseNode :: JSObject JSValue -> Result String
parseNode a =
let name = getStringElement "name" a
offline = getBoolElement "offline" a
mfree = getIntElement "mfree" a
dtotal = getIntElement "dtotal" a
dfree = getIntElement "dfree" a
- in concatEitherElems name $
+ in name |+
(case offline of
- Right True -> Right "0|0|0|0|0|Y"
+ Ok True -> Ok "0|0|0|0|0|Y"
_ ->
- concatEitherElems (show `applyEither1` mtotal) $
- concatEitherElems (show `applyEither1` mnode) $
- concatEitherElems (show `applyEither1` mfree) $
- concatEitherElems (show `applyEither1` dtotal) $
- concatEitherElems (show `applyEither1` dfree)
- ((applyEither2 (||) offline drained) `combineEithers` boolToYN)
+ (show `liftM` mtotal) |+ (show `liftM` mnode) |+
+ (show `liftM` mfree) |+ (show `liftM` dtotal) |+
+ (show `liftM` dfree) |+
+ ((liftM2 (||) offline drained) >>= boolToYN)
)