{-# LANGUAGE PackageImports #-} module Propellor.Attr where import Propellor.Types import Propellor.Types.Attr import "mtl" Control.Monad.Reader import qualified Data.Set as S import qualified Data.Map as M import Data.Maybe import Control.Applicative pureAttrProperty :: Desc -> SetAttr -> Property pureAttrProperty desc = Property ("has " ++ desc) (return NoChange) hostname :: HostName -> Property hostname name = pureAttrProperty ("hostname " ++ name) $ \d -> d { _hostname = name } getHostName :: Propellor HostName getHostName = asks _hostname os :: System -> Property os system = pureAttrProperty ("Operating " ++ show system) $ \d -> d { _os = Just system } getOS :: Propellor (Maybe System) getOS = asks _os -- | Indidate that a host has an A record in the DNS. -- -- TODO check at run time if the host really has this address. -- (Can't change the host's address, but as a sanity check.) ipv4 :: String -> Property ipv4 = addDNS . Address . IPv4 -- | Indidate that a host has an AAAA record in the DNS. ipv6 :: String -> Property ipv6 = addDNS . Address . IPv6 -- | Indicates another name for the host in the DNS. alias :: Domain -> Property alias = addDNS . CNAME . AbsDomain addDNS :: Record -> Property addDNS r = pureAttrProperty (rdesc r) $ \d -> d { _dns = S.insert r (_dns d) } where rdesc (CNAME d) = unwords ["alias", ddesc d] rdesc (Address (IPv4 addr)) = unwords ["ipv4", addr] rdesc (Address (IPv6 addr)) = unwords ["ipv6", addr] rdesc (MX n d) = unwords ["MX", show n, ddesc d] rdesc (NS d) = unwords ["NS", ddesc d] rdesc (TXT s) = unwords ["TXT", s] rdesc (SRV x y z d) = unwords ["SRV", show x, show y, show z, ddesc d] ddesc (AbsDomain domain) = domain ddesc (RelDomain domain) = domain ddesc RootDomain = "@" -- | Adds a DNS NamedConf stanza. -- -- Note that adding a Master stanza for a domain always overrides an -- existing Secondary stanza, while a Secondary stanza is only added -- when there is no existing Master stanza. addNamedConf :: NamedConf -> SetAttr addNamedConf conf d = d { _namedconf = new } where m = _namedconf d domain = confDomain conf new = case (confDnsServerType conf, confDnsServerType <$> M.lookup domain m) of (Secondary, Just Master) -> m _ -> M.insert domain conf m getNamedConf :: Propellor (M.Map Domain NamedConf) getNamedConf = asks _namedconf sshPubKey :: String -> Property sshPubKey k = pureAttrProperty ("ssh pubkey known") $ \d -> d { _sshPubKey = Just k } getSshPubKey :: Propellor (Maybe String) getSshPubKey = asks _sshPubKey hostAttr :: Host -> Attr hostAttr (Host hn _ mkattrs) = mkattrs (newAttr hn) hostProperties :: Host -> [Property] hostProperties (Host _ ps _) = ps hostMap :: [Host] -> M.Map HostName Host hostMap l = M.fromList $ zip (map _hostName l) l hostAttrMap :: [Host] -> M.Map HostName Attr hostAttrMap l = M.fromList $ zip (map _hostName l) (map hostAttr l) findHost :: [Host] -> HostName -> Maybe Host findHost l hn = M.lookup hn (hostMap l) getAddresses :: Attr -> [IPAddr] getAddresses = mapMaybe getIPAddr . S.toList . _dns hostAddresses :: HostName -> [Host] -> [IPAddr] hostAddresses hn hosts = case hostAttr <$> findHost hosts hn of Nothing -> [] Just attr -> mapMaybe getIPAddr $ S.toList $ _dns attr -- | Lifts an action into a different host. -- -- For example, `fromHost hosts "otherhost" getSshPubKey` fromHost :: [Host] -> HostName -> Propellor a -> Propellor (Maybe a) fromHost l hn getter = case findHost l hn of Nothing -> return Nothing Just h -> liftIO $ Just <$> runReaderT (runWithAttr getter) (hostAttr h)