{-# LANGUAGE LambdaCase, CPP #-}
module Puppet.Daemon (initDaemon, logDebug, logInfo, logWarning, logError) where
import Puppet.Parser
import Puppet.Utils
import Puppet.Preferences
import Puppet.Stats
import Puppet.Interpreter.Types
import Puppet.Parser.Types
import Puppet.Manifests
import Puppet.Interpreter
import Puppet.Interpreter.IO
import Puppet.Plugins
import Puppet.PP
import Hiera.Server
import Erb.Compute
import Data.FileCache
import qualified System.Log.Logger as LOG
import qualified Data.Text as T
import qualified Data.Text.IO as T
import qualified Data.Vector as V
import qualified Data.HashMap.Strict as HM
import Debug.Trace
import Control.Lens
import qualified Data.Either.Strict as S
import Data.Tuple.Strict
import Control.Exception
import Foreign.Ruby.Safe
loggerName :: String
loggerName = "Puppet.Daemon"
logDebug :: T.Text -> IO ()
logDebug = LOG.debugM loggerName . T.unpack
logInfo :: T.Text -> IO ()
logInfo = LOG.infoM loggerName . T.unpack
logWarning :: T.Text -> IO ()
logWarning = LOG.warningM loggerName . T.unpack
logError :: T.Text -> IO ()
logError = LOG.errorM loggerName . T.unpack
{-| This is a high level function, that will initialize the parsing and
interpretation infrastructure from the 'Prefs' structure, and will return a
function that will take a node name, 'Facts' and return either an error or the
'FinalCatalog', along with the dependency graph and catalog of exported resources. It also return a few IO
functions that can be used in order to query the daemon for statistics,
following the format in "Puppet.Stats".
It will internaly initialize a thread for the LUA interpreter, and a thread for the Ruby one.
It should cache the AST of every .pp file, and could use a bit of memory. As a comparison, it
fits in 60 MB with the author's manifests, but really breathes when given 300 MB
of heap space. In this configuration, even if it spawns a ruby process for every
template evaluation, it is way faster than the puppet stack.
It can optionnaly talk with PuppetDB, by setting an URL in the 'Prefs' data
structure. The recommended way to set it to http://localhost:8080 and set a SSH
tunnel :
> ssh -L 8080:localhost:8080 puppet.host
Known bugs :
* It might be buggy when top level statements that are not class\/define\/nodes
are altered, or when files loaded with require are changed.
* The catalog is not computed exactly the same way Puppet does. Take a look at
"Puppet.Interpreter.Catalog" for a list of differences.
* Parsing incompatibilities are listed in "Puppet.DSL.Parser".
* There might be race conditions because file status are checked before they
are opened. This means the program might end with an exception when the file
is nonexistent. This will need fixing.
-}
initDaemon :: Preferences IO -> IO DaemonMethods
initDaemon prefs = do
logDebug "initDaemon"
traceEventIO "initDaemon"
templateStats <- newStats
parserStats <- newStats
catalogStats <- newStats
pfilecache <- newFileCache
let getStatements = parseFunction prefs pfilecache parserStats
intr <- startRubyInterpreter
getTemplate <- initTemplateDaemon intr prefs templateStats
hquery <- case prefs ^. hieraPath of
Just p -> startHiera p >>= \case
Left _ -> return dummyHiera
Right x -> return x
Nothing -> return dummyHiera
luacontainer <- initLuaMaster (T.pack (prefs ^. modulesPath))
let myprefs = prefs & prefExtFuncs %~ HM.union luacontainer
return (DaemonMethods (gCatalog myprefs getStatements getTemplate catalogStats hquery) parserStats catalogStats templateStats)
gCatalog :: Preferences IO
-> ( TopLevelType -> T.Text -> IO (S.Either PrettyError Statement) )
-> (Either T.Text T.Text -> T.Text -> Container ScopeInformation -> IO (S.Either PrettyError T.Text))
-> MStats
-> HieraQueryFunc IO
-> T.Text
-> Facts
-> IO (S.Either PrettyError (FinalCatalog, EdgeMap, FinalCatalog, [Resource]))
gCatalog prefs getStatements getTemplate stats hquery ndename facts = do
logDebug ("Received query for node " <> ndename)
traceEventIO ("START gCatalog " <> T.unpack ndename)
(stmts :!: warnings) <- measure stats ndename $
getCatalog interpretMonad
getStatements
getTemplate
(prefs ^. prefPDB)
ndename
facts
(prefs ^. natTypes)
(prefs ^. prefExtFuncs)
hquery
defaultImpureMethods
(prefs ^. ignoredmodules)
mapM_ (\(p :!: m) -> LOG.logM loggerName p (displayS (renderCompact (ttext ndename <> ":" <+> m)) "")) warnings
traceEventIO ("STOP gCatalog " <> T.unpack ndename)
return stmts
parseFunction :: Preferences IO -> FileCache (V.Vector Statement) -> MStats -> TopLevelType -> T.Text -> IO (S.Either PrettyError Statement)
parseFunction prefs filecache stats topleveltype toplevelname =
case compileFileList prefs topleveltype toplevelname of
S.Left rr -> return (S.Left rr)
S.Right fname -> do
let sfname = T.unpack fname
handleFailure :: SomeException -> IO (S.Either String (V.Vector Statement))
handleFailure e = return (S.Left (show e))
x <- measure stats fname (query filecache sfname (parseFile sfname `catch` handleFailure))
case x of
S.Right stmts -> filterStatements topleveltype toplevelname stmts
S.Left rr -> return (S.Left (PrettyError (red (text rr))))
-- TODO this is wrong, see
-- http://docs.puppetlabs.com/puppet/3/reference/lang_namespaces.html#behavior
compileFileList :: Preferences IO -> TopLevelType -> T.Text -> S.Either PrettyError T.Text
compileFileList prefs TopNode _ = S.Right (T.pack (prefs ^. manifestPath) <> "/site.pp")
compileFileList prefs _ name = moduleInfo
where
moduleInfo | length nameparts == 1 = S.Right (mpath <> "/" <> name <> "/manifests/init.pp")
| null nameparts = S.Left "no name parts, error in compilefilelist"
| otherwise = S.Right (mpath <> "/" <> head nameparts <> "/manifests/" <> T.intercalate "/" (tail nameparts) <> ".pp")
mpath = T.pack (prefs ^. modulesPath)
nameparts = T.splitOn "::" name
parseFile :: FilePath -> IO (S.Either String (V.Vector Statement))
parseFile fname = do
traceEventIO ("START parsing " ++ fname)
cnt <- T.readFile fname
o <- case runPParser puppetParser fname cnt of
Right r -> traceEventIO ("Stopped parsing " ++ fname) >> return (S.Right r)
Left rr -> traceEventIO ("Stopped parsing " ++ fname ++ " (failure: " ++ show rr ++ ")") >> return (S.Left (show rr))
traceEventIO ("STOP parsing " ++ fname)
return o