-
--- Balancing functions
-
--- Loading functions
-
-{- | Convert newline and delimiter-separated text.
-
-This function converts a text in tabular format as generated by
-@gnt-instance list@ and @gnt-node list@ to a list of objects using a
-supplied conversion function.
-
--}
-loadTabular :: (Monad m) => String -> ([String] -> m (String, a))
- -> (a -> Int -> a) -> m ([(String, Int)], [(Int, a)])
-loadTabular text_data convert_fn set_fn = do
- let lines_data = lines text_data
- rows = map (sepSplit '|') lines_data
- kerows <- mapM convert_fn rows
- let idxrows = map (\ (idx, (k, v)) -> ((k, idx), (idx, set_fn v idx)))
- (zip [0..] kerows)
- return $ unzip idxrows
-
--- | For each instance, add its index to its primary and secondary nodes
-fixNodes :: [(Int, Node.Node)]
- -> [(Int, Instance.Instance)]
- -> [(Int, Node.Node)]
-fixNodes nl il =
- foldl' (\accu (idx, inst) ->
- let
- assocEqual = (\ (i, _) (j, _) -> i == j)
- pdx = Instance.pnode inst
- sdx = Instance.snode inst
- pold = fromJust $ lookup pdx accu
- sold = fromJust $ lookup sdx accu
- pnew = Node.setPri pold idx
- snew = Node.setSec sold idx
- ac1 = deleteBy assocEqual (pdx, pold) accu
- ac2 = deleteBy assocEqual (sdx, sold) ac1
- ac3 = (pdx, pnew):(sdx, snew):ac2
- in ac3) nl il
-
--- | Compute the longest common suffix of a NameList list that
--- | starts with a dot
-longestDomain :: NameList -> String
-longestDomain [] = ""
-longestDomain ((_,x):xs) =
- let
- onlyStrings = snd $ unzip xs
- in
- foldr (\ suffix accu -> if all (isSuffixOf suffix) onlyStrings
- then suffix
- else accu)
- "" $ filter (isPrefixOf ".") (tails x)
-
--- | Remove tails from the (Int, String) lists
-stripSuffix :: String -> NameList -> NameList
-stripSuffix suffix lst =
- let sflen = length suffix in
- map (\ (key, name) -> (key, take ((length name) - sflen) name)) lst
-
--- | Lookups a node into an assoc list
-lookupNode :: (Monad m) => String -> String -> [(String, Int)] -> m Int
-lookupNode node inst ktn =
- case lookup node ktn of
- Nothing -> fail $ "Unknown node " ++ node ++ " for instance " ++ inst
- Just idx -> return idx
-
-loadNode :: (Monad m) => [String] -> m (String, Node.Node)
-loadNode (name:tm:nm:fm:td:fd:fo:[]) = do
- let new_node =
- if any (== "?") [tm,nm,fm,td,fd] || fo == "Y" then
- Node.create 0 0 0 0 0 True
- else
- Node.create (read tm) (read nm) (read fm)
- (read td) (read fd) False
- return (name, new_node)
-loadNode s = fail $ "Invalid/incomplete node data: '" ++ (show s) ++ "'"
-
-loadInst :: (Monad m) =>
- [(String, Int)] -> [String] -> m (String, Instance.Instance)
-loadInst ktn (name:mem:dsk:status:pnode:snode:[]) = do
- pidx <- lookupNode pnode name ktn
- sidx <- lookupNode snode name ktn
- when (sidx == pidx) $ fail $ "Instance " ++ name ++
- " has same primary and secondary node - " ++ pnode
- let newinst = Instance.create (read mem) (read dsk) status pidx sidx
- return (name, newinst)
-loadInst _ s = fail $ "Invalid/incomplete instance data: '" ++ (show s) ++ "'"
-
-{-| Initializer function that loads the data from a node and list file
- and massages it into the correct format. -}
-loadData :: String -- ^ Node data in text format
- -> String -- ^ Instance data in text format
- -> Result (Container.Container Node.Node,
- Container.Container Instance.Instance,
- String, NameList, NameList)
-loadData ndata idata = do
- {- node file: name t_mem n_mem f_mem t_disk f_disk -}
- (ktn, nl) <- loadTabular ndata loadNode Node.setIdx
- {- instance file: name mem disk status pnode snode -}
- (kti, il) <- loadTabular idata (loadInst ktn) Instance.setIdx
- let
- nl2 = fixNodes nl il
- il3 = Container.fromAssocList il
- nl3 = Container.fromAssocList
- (map (\ (k, v) -> (k, Node.buildPeers v il3 (length nl2))) nl2)
- xtn = swapPairs ktn
- xti = swapPairs kti
- common_suffix = longestDomain (xti ++ xtn)
- stn = stripSuffix common_suffix xtn
- sti = stripSuffix common_suffix xti
- return (nl3, il3, common_suffix, stn, sti)
-
--- | Compute the amount of memory used by primary instances on a node.
-nodeImem :: Node.Node -> InstanceList -> Int
-nodeImem node il =
- let rfind = flip Container.find $ il
- in sum . map Instance.mem .
- map rfind $ Node.plist node
-
--- | Compute the amount of disk used by instances on a node (either primary
--- or secondary).
-nodeIdsk :: Node.Node -> InstanceList -> Int
-nodeIdsk node il =
- let rfind = flip Container.find $ il
- in sum . map Instance.dsk .
- map rfind $ (Node.plist node) ++ (Node.slist node)
-
-
--- | Check cluster data for consistency
-checkData :: NodeList -> InstanceList -> NameList -> NameList
- -> ([String], NodeList)
-checkData nl il ktn _ =
- Container.mapAccum
- (\ msgs node ->
- let nname = fromJust $ lookup (Node.idx node) ktn
- nilst = map (flip Container.find $ il) (Node.plist node)
- dilst = filter (not . Instance.running) nilst
- adj_mem = sum . map Instance.mem $ dilst
- delta_mem = (truncate $ Node.t_mem node)
- - (Node.n_mem node)
- - (Node.f_mem node)
- - (nodeImem node il)
- + adj_mem
- delta_dsk = (truncate $ Node.t_dsk node)
- - (Node.f_dsk node)
- - (nodeIdsk node il)
- newn = Node.setFmem (Node.setXmem node delta_mem)
- (Node.f_mem node - adj_mem)
- umsg1 = if delta_mem > 512 || delta_dsk > 1024
- then [printf "node %s is missing %d MB ram \
- \and %d GB disk"
- nname delta_mem (delta_dsk `div` 1024)]
- else []
- in (msgs ++ umsg1, newn)
- ) [] nl
projects / ganeti-local / blobdiff