module Ganeti.HTools.Rapi
(
- getNodes
- , getInstances
+ loadData
) 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
+import Text.JSON (JSObject, JSValue)
import Text.Printf (printf)
-import Ganeti.HTools.Utils ()
+import Ganeti.HTools.Utils
+import Ganeti.HTools.Loader
+import Ganeti.HTools.Types
+import qualified Ganeti.HTools.Node as Node
+import qualified Ganeti.HTools.Instance as Instance
--- Some constants
-
--- | The fixed drbd overhead per disk (only used with 1.2's sdx_size)
-drbdOverhead = 128
-
-{-- Our cheap monad-like stuff.
-
-Thi is needed since Either e a is already a monad instance somewhere
-in the standard libraries (Control.Monad.Error) and we don't need that
-entire thing.
-
--}
-combine :: (Either String a) -> (a -> Either String b) -> (Either String b)
-combine (Left s) _ = Left s
-combine (Right s) f = f s
-
-ensureList :: [Either String a] -> Either String [a]
-ensureList lst =
- foldr (\elem accu ->
- case (elem, accu) of
- (Left x, _) -> Left x
- (_, Left x) -> Left x -- should never happen
- (Right e, Right a) -> Right (e:a)
- )
- (Right []) lst
-
-listHead :: Either String [a] -> Either String a
-listHead lst =
- case lst of
- Left x -> Left x
- Right (x:_) -> Right x
- Right [] -> Left "List empty"
-
-loadJSArray :: String -> Either String [JSObject JSValue]
-loadJSArray s = resultToEither $ decodeStrict s
-
-fromObj :: JSON a => String -> JSObject JSValue -> Either String a
-fromObj k o =
- case lookup k (fromJSObject o) of
- Nothing -> Left $ printf "key '%s' not found" k
- Just val -> resultToEither $ readJSON val
-
-getStringElement :: String -> JSObject JSValue -> Either String String
-getStringElement = fromObj
-
-getIntElement :: String -> JSObject JSValue -> Either String Int
-getIntElement = fromObj
-
-getListElement :: String -> JSObject JSValue
- -> Either String [JSValue]
-getListElement = fromObj
-
-readString :: JSValue -> Either String String
-readString v =
- case v of
- JSString s -> Right $ fromJSString s
- _ -> Left "Wrong JSON type"
-
-concatElems :: Either String String
- -> Either String String
- -> Either String String
-concatElems = apply2 (\x y -> x ++ "|" ++ y)
-
-apply1 :: (a -> b) -> Either String a -> Either String b
-apply1 fn a =
- case a of
- Left x -> Left x
- Right y -> Right $ fn y
-
-apply2 :: (a -> b -> c)
- -> Either String a
- -> Either String b
- -> Either String c
-apply2 fn a b =
- case (a, b) of
- (Right x, Right y) -> Right $ fn x y
- (Left x, _) -> Left x
- (_, Left y) -> Left y
-
-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))
-tryRapi :: String -> String -> IO (Either String String)
-tryRapi url1 url2 =
- do
- body1 <- getUrl url1
- (case body1 of
- Left _ -> getUrl url2
- Right _ -> return body1)
-
-getInstances :: String -> IO (Either String String)
-getInstances master =
- let
- url2 = printf "https://%s:5080/2/instances?bulk=1" master
- url1 = printf "http://%s:5080/instances?bulk=1" master
- in do
- body <- tryRapi url1 url2
- let inst = body `combine` loadJSArray `combine` (parseList parseInstance)
- return inst
-
-getNodes :: String -> IO (Either String String)
-getNodes master =
- let
- url2 = printf "https://%s:5080/2/nodes?bulk=1" master
- url1 = printf "http://%s:5080/nodes?bulk=1" master
- in do
- body <- tryRapi url1 url2
- let inst = body `combine` loadJSArray `combine` (parseList parseNode)
- return inst
-
-parseList :: (JSObject JSValue -> Either String String)
- -> [JSObject JSValue]
- ->Either String String
-parseList fn idata =
- let ml = ensureList $ map fn idata
- in ml `combine` (Right . unlines)
-
-parseInstance :: JSObject JSValue -> Either String String
-parseInstance a =
- let name = getStringElement "name" a
- disk = case getIntElement "disk_usage" a of
- Left _ -> let log_sz = apply2 (+)
- (getIntElement "sda_size" a)
- (getIntElement "sdb_size" a)
- in apply2 (+) log_sz (Right $ drbdOverhead * 2)
- Right x -> Right x
- bep = fromObj "beparams" a
- pnode = getStringElement "pnode" a
- snode = (listHead $ getListElement "snodes" a) `combine` readString
- mem = case bep of
- Left _ -> getIntElement "admin_ram" a
- Right o -> getIntElement "memory" o
- running = getStringElement "status" a
- in
- concatElems name $
- concatElems (show `apply1` mem) $
- concatElems (show `apply1` disk) $
- concatElems running $
- concatElems pnode snode
-
-parseNode :: JSObject JSValue -> Either String String
-parseNode a =
- let name = getStringElement "name" a
- mtotal = getIntElement "mtotal" a
- mnode = getIntElement "mnode" a
- mfree = getIntElement "mfree" a
- dtotal = getIntElement "dtotal" a
- dfree = getIntElement "dfree" a
- in concatElems name $
- concatElems (show `apply1` mtotal) $
- concatElems (show `apply1` mnode) $
- concatElems (show `apply1` mfree) $
- concatElems (show `apply1` dtotal) (show `apply1` dfree)
+-- | Append the default port if not passed in
+formatHost :: String -> String
+formatHost master =
+ if elem ':' master then master
+ else "https://" ++ master ++ ":5080"
+
+getInstances :: NameAssoc
+ -> String
+ -> Result [(String, Instance.Instance)]
+getInstances ktn body = do
+ arr <- loadJSArray body
+ ilist <- mapM (parseInstance ktn) arr
+ return ilist
+
+getNodes :: String -> Result [(String, Node.Node)]
+getNodes body = do
+ arr <- loadJSArray body
+ nlist <- mapM parseNode arr
+ return nlist
+
+parseInstance :: [(String, Int)]
+ -> JSObject 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
+ snode <- (if null snodes then return Node.noSecondary
+ else readEitherString (head snodes) >>= lookupNode ktn name)
+ running <- fromObj "status" a
+ let inst = Instance.create mem disk running pnode snode
+ return (name, inst)
+
+parseNode :: JSObject JSValue -> Result (String, Node.Node)
+parseNode a = do
+ name <- fromObj "name" a
+ offline <- fromObj "offline" a
+ node <- (case offline of
+ True -> return $ Node.create 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 mtotal mnode mfree
+ dtotal dfree (offline || drained))
+ return (name, node)
+
+loadData :: String -- ^ Cluster/URL to use as source
+ -> IO (Result (NameAssoc, Node.AssocList,
+ NameAssoc, Instance.AssocList))
+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
+ return $ do -- Result monad
+ node_data <- node_body >>= getNodes
+ let (node_names, node_idx) = assignIndices Node.setIdx node_data
+ inst_data <- inst_body >>= getInstances node_names
+ let (inst_names, inst_idx) = assignIndices Instance.setIdx inst_data
+ return (node_names, node_idx, inst_names, inst_idx)
projects / ganeti-local / blobdiff