summaryrefslogtreecommitdiff
path: root/src/Propellor/Property/Conductor.hs
AgeCommit message (Collapse)Author
2018-04-23semigroup monoid change fallout; drop ghc 7 supportJoey Hess
Fix build with ghc 8.4, which broke due to the Semigroup Monoid change. See https://prime.haskell.org/wiki/Libraries/Proposals/SemigroupMonoid Dropped support for building propellor with ghc 7 (as in debian oldstable), to avoid needing to depend on the semigroups transitional package, but also because it's just too old to be worth supporting. If we indeed drop ghc 7 support entirely, some code to support "jessie" can be removed; concurrent-output can be de-embedded, and the Singletons code can be simplified. This commit was sponsored by Jack Hill on Patreon.
2017-03-11don't propagate DNS info from DiskImage chrootsJoey Hess
* DiskImage building properties used to propagate DNS info out from the chroot used to build the disk image to the Host. That is no longer done, since that chroot only exists as a side effect of the disk image creation and servers will not be running in it. * The IsInfo types class's propagateInfo function changed to use a PropagateInfo data type. (API change) This is particularly important when using hostChroot, since the host could well have DNS settings then. This commit was sponsored by Ole-Morten Duesund on Patreon.
2016-03-27improve haddocks and move code around to make them more clearJoey Hess
2016-03-27ported DiskImageJoey Hess
Unfortunately, DiskImage needs to add properties to the Chroot it's presented with, and the metatypes are not included in the Chroot, so it can't guarantee that the properties it's adding match the OS in the Chroot. I partially worked around this by making the properties that DiskImage adds check the OS, so they don't assume Debian. It would be nicer to parameterize the Chroot type with the metatypes of the inner OS. I worked for several hours on a patch along those lines, but it doesn't quite compile. Failed at the final hurdle :/ The patch is below for later.. --- src/Propellor/Property/Chroot.hs 2016-03-27 16:06:44.285464820 -0400 +++ /home/joey/Chroot.hs 2016-03-27 15:32:29.073416143 -0400 @@ -1,9 +1,9 @@ -{-# LANGUAGE FlexibleContexts, GADTs, DeriveDataTypeable #-} +{-# LANGUAGE FlexibleContexts, GADTs, DeriveDataTypeable, MultiParamTypeClasses, TypeSynonymInstances, FlexibleInstances, DataKinds #-} module Propellor.Property.Chroot ( debootstrapped, bootstrapped, - provisioned, + --provisioned, Chroot(..), ChrootBootstrapper(..), Debootstrapped(..), @@ -11,7 +11,7 @@ noServices, inChroot, -- * Internal use - provisioned', + --provisioned', propagateChrootInfo, propellChroot, chain, @@ -20,6 +20,7 @@ import Propellor.Base import Propellor.Container +import Propellor.Types.MetaTypes import Propellor.Types.CmdLine import Propellor.Types.Chroot import Propellor.Types.Info @@ -38,27 +39,29 @@ -- | Specification of a chroot. Normally you'll use `debootstrapped` or -- `bootstrapped` to construct a Chroot value. -data Chroot where - Chroot :: ChrootBootstrapper b => FilePath -> b -> Host -> Chroot - -instance IsContainer Chroot where - containerProperties (Chroot _ _ h) = containerProperties h - containerInfo (Chroot _ _ h) = containerInfo h - setContainerProperties (Chroot loc b h) ps = Chroot loc b (setContainerProperties h ps) +-- +-- The inner and outer type variables are the metatypes of the inside of +-- the chroot and the system it runs in. +data Chroot inner outer where + Chroot :: ChrootBootstrapper b inner outer => FilePath -> b -> Host -> (inner, outer) -> Chroot inner outer + +instance IsContainer (Chroot inner outer) where + containerProperties (Chroot _ _ h _) = containerProperties h + containerInfo (Chroot _ _ h _) = containerInfo h -chrootSystem :: Chroot -> Maybe System +chrootSystem :: Chroot inner outer -> Maybe System chrootSystem = fromInfoVal . fromInfo . containerInfo -instance Show Chroot where - show c@(Chroot loc _ _) = "Chroot " ++ loc ++ " " ++ show (chrootSystem c) +instance Show (Chroot inner outer) where + show c@(Chroot loc _ _ _) = "Chroot " ++ loc ++ " " ++ show (chrootSystem c) -- | Class of things that can do initial bootstrapping of an operating -- System in a chroot. -class ChrootBootstrapper b where +class ChrootBootstrapper b inner outer where -- | Do initial bootstrapping of an operating system in a chroot. -- If the operating System is not supported, return -- Left error message. - buildchroot :: b -> Maybe System -> FilePath -> Either String (Property Linux) + buildchroot :: b -> Maybe System -> FilePath -> Either String (Property outer) -- | Use this to bootstrap a chroot by extracting a tarball. -- @@ -68,9 +71,8 @@ -- detect automatically. data ChrootTarball = ChrootTarball FilePath -instance ChrootBootstrapper ChrootTarball where - buildchroot (ChrootTarball tb) _ loc = Right $ - tightenTargets $ extractTarball loc tb +instance ChrootBootstrapper ChrootTarball UnixLike UnixLike where + buildchroot (ChrootTarball tb) _ loc = Right $ extractTarball loc tb extractTarball :: FilePath -> FilePath -> Property UnixLike extractTarball target src = check (unpopulated target) $ @@ -88,7 +90,7 @@ -- | Use this to bootstrap a chroot with debootstrap. data Debootstrapped = Debootstrapped Debootstrap.DebootstrapConfig -instance ChrootBootstrapper Debootstrapped where +instance ChrootBootstrapper Debootstrapped DebianLike Linux where buildchroot (Debootstrapped cf) system loc = case system of (Just s@(System (Debian _) _)) -> Right $ debootstrap s (Just s@(System (Buntish _) _)) -> Right $ debootstrap s @@ -107,13 +109,22 @@ -- > & osDebian Unstable "amd64" -- > & Apt.installed ["ghc", "haskell-platform"] -- > & ... -debootstrapped :: Debootstrap.DebootstrapConfig -> FilePath -> Chroot +-- debootstrapped :: Debootstrap.DebootstrapConfig -> FilePath -> Chroot DebianLike +debootstrapped + :: (SingI inner, SingI outer, ChrootBootstrapper Debootstrapped (MetaTypes inner) (MetaTypes outer)) + => Debootstrap.DebootstrapConfig + -> FilePath + -> Chroot (MetaTypes inner) (MetaTypes outer) debootstrapped conf = bootstrapped (Debootstrapped conf) -- | Defines a Chroot at the given location, bootstrapped with the -- specified ChrootBootstrapper. -bootstrapped :: ChrootBootstrapper b => b -> FilePath -> Chroot -bootstrapped bootstrapper location = Chroot location bootstrapper h +bootstrapped + :: (SingI inner, SingI outer, ChrootBootstrapper b (MetaTypes inner) (MetaTypes outer)) + => b + -> FilePath + -> Chroot (MetaTypes inner) (MetaTypes outer) +bootstrapped bootstrapper location = Chroot location bootstrapper h (sing, sing) where h = Host location [] mempty @@ -123,45 +134,79 @@ -- Reverting this property removes the chroot. Anything mounted inside it -- is first unmounted. Note that it does not ensure that any processes -- that might be running inside the chroot are stopped. -provisioned :: Chroot -> RevertableProperty (HasInfo + Linux) Linux +-- provisioned :: SingI outer => Chroot inner outer -> RevertableProperty (HasInfo + MetaTypes outer) Linux +provisioned + :: + ( SingI outer + , SingI metatypes + , Combines (Property (MetaTypes outer)) (Property (MetaTypes outer)) + , (HasInfo + outer) ~ MetaTypes metatypes + , CombinedType (Property (MetaTypes outer)) (Property (MetaTypes outer)) ~ Property outer + , IncludesInfo (MetaTypes metatypes) ~ 'True) + => Chroot inner outer -> RevertableProperty (HasInfo + outer) Linux provisioned c = provisioned' (propagateChrootInfo c) c False provisioned' - :: (Property Linux -> Property (HasInfo + Linux)) - -> Chroot + :: + ( Combines (Property (MetaTypes outer)) (Property (MetaTypes outer)) + , CombinedType (Property (MetaTypes outer)) (Property (MetaTypes outer)) ~ Property outer + , SingI outer + ) + => (Property outer -> Property (HasInfo + outer)) + -> Chroot inner outer -> Bool - -> RevertableProperty (HasInfo + Linux) Linux -provisioned' propigator c@(Chroot loc bootstrapper _) systemdonly = - (propigator $ setup `describe` chrootDesc c "exists") + -> RevertableProperty (HasInfo + outer) Linux +provisioned' propigator c systemdonly = + (propigator $ setup c systemdonly `describe` chrootDesc c "exists") <!> - (teardown `describe` chrootDesc c "removed") - where - setup :: Property Linux - setup = propellChroot c (inChrootProcess (not systemdonly) c) systemdonly - `requires` built - - built = case buildchroot bootstrapper (chrootSystem c) loc of - Right p -> p - Left e -> cantbuild e - - cantbuild e = property (chrootDesc c "built") (error e) - - teardown :: Property Linux - teardown = check (not <$> unpopulated loc) $ - property ("removed " ++ loc) $ - makeChange (removeChroot loc) - -propagateChrootInfo :: Chroot -> Property Linux -> Property (HasInfo + Linux) -propagateChrootInfo c@(Chroot location _ _) p = propagateContainer location c $ - p `addInfoProperty` chrootInfo c + (teardown c `describe` chrootDesc c "removed") -chrootInfo :: Chroot -> Info -chrootInfo (Chroot loc _ h) = mempty `addInfo` +-- chroot removal code is currently linux specific.. +teardown :: Chroot inner outer -> Property Linux +teardown (Chroot loc _ _ _) = check (not <$> unpopulated loc) $ + property ("removed " ++ loc) $ + makeChange (removeChroot loc) + +setup + :: + ( SingI outer + , Combines (Property (MetaTypes outer)) (Property (MetaTypes outer)) + ) + => Chroot inner outer + -> Bool + -> CombinedType (Property (MetaTypes outer)) (Property (MetaTypes outer)) +setup c systemdonly = propellChroot c (inChrootProcess (not systemdonly) c) systemdonly + `requires` built c + +built :: (SingI outer, ChrootBootstrapper b inner outer) => Chroot inner outer -> Property (MetaTypes outer) +built c@(Chroot loc bootstrapper _ _) = + case buildchroot bootstrapper (chrootSystem c) loc of + Right p -> error "FOO" -- p + Left e -> error "FOO" -- cantbuild c e + +cantbuild :: Chroot inner outer -> String -> Property UnixLike +cantbuild c e = property (chrootDesc c "built") (error e) + +propagateChrootInfo + :: + ( SingI metatypes + , (HasInfo + outer) ~ MetaTypes metatypes + , IncludesInfo (MetaTypes metatypes) ~ 'True + ) + => Chroot inner outer + -> Property outer + -> Property (MetaTypes metatypes) +propagateChrootInfo c@(Chroot location _ _ _) p = + propagateContainer location c $ + p `addInfoProperty` chrootInfo c + +chrootInfo :: Chroot inner outer -> Info +chrootInfo (Chroot loc _ h _) = mempty `addInfo` mempty { _chroots = M.singleton loc h } -- | Propellor is run inside the chroot to provision it. -propellChroot :: Chroot -> ([String] -> IO (CreateProcess, IO ())) -> Bool -> Property UnixLike -propellChroot c@(Chroot loc _ _) mkproc systemdonly = property (chrootDesc c "provisioned") $ do +propellChroot :: SingI outer => Chroot inner outer -> ([String] -> IO (CreateProcess, IO ())) -> Bool -> Property (MetaTypes outer) +propellChroot c@(Chroot loc _ _ _) mkproc systemdonly = property (chrootDesc c "provisioned") $ do let d = localdir </> shimdir c let me = localdir </> "propellor" shim <- liftIO $ ifM (doesDirectoryExist d) @@ -199,8 +244,8 @@ liftIO cleanup return r -toChain :: HostName -> Chroot -> Bool -> IO CmdLine -toChain parenthost (Chroot loc _ _) systemdonly = do +toChain :: HostName -> Chroot inner outer -> Bool -> IO CmdLine +toChain parenthost (Chroot loc _ _ _) systemdonly = do onconsole <- isConsole <$> getMessageHandle return $ ChrootChain parenthost loc systemdonly onconsole @@ -224,8 +269,8 @@ putStrLn $ "\n" ++ show r chain _ _ = errorMessage "bad chain command" -inChrootProcess :: Bool -> Chroot -> [String] -> IO (CreateProcess, IO ()) -inChrootProcess keepprocmounted (Chroot loc _ _) cmd = do +inChrootProcess :: Bool -> Chroot inner outer -> [String] -> IO (CreateProcess, IO ()) +inChrootProcess keepprocmounted (Chroot loc _ _ _) cmd = do mountproc return (proc "chroot" (loc:cmd), cleanup) where @@ -244,26 +289,24 @@ provisioningLock :: FilePath -> FilePath provisioningLock containerloc = "chroot" </> mungeloc containerloc ++ ".lock" -shimdir :: Chroot -> FilePath -shimdir (Chroot loc _ _) = "chroot" </> mungeloc loc ++ ".shim" +shimdir :: Chroot inner outer -> FilePath +shimdir (Chroot loc _ _ _) = "chroot" </> mungeloc loc ++ ".shim" mungeloc :: FilePath -> String mungeloc = replace "/" "_" -chrootDesc :: Chroot -> String -> String -chrootDesc (Chroot loc _ _) desc = "chroot " ++ loc ++ " " ++ desc +chrootDesc :: Chroot inner outer -> String -> String +chrootDesc (Chroot loc _ _ _) desc = "chroot " ++ loc ++ " " ++ desc
2016-03-26ported dockerJoey Hess
Also, implemented modifyHostProps to add properties to an existing host. Using it bypasses some type safety. Its use in docker is safe though. But, in Conductor, the use of it was not really safe, because it was used with a DebianLike property. Fixed that by making Ssh.installed target all unix's, although it will fail on non-DebianLike ones.
2016-03-26ported propagateContainerJoey Hess
Renamed several utility functions along the way.
2016-03-26finished porting conductorJoey Hess
2016-03-26more portingJoey Hess
Conductor WIP
2015-10-27Explicit Info/NoInfo for RevertableProperty (API change)Joey Hess
RevertableProperty used to be assumed to contain info, but this is now made explicit, with RevertableProperty HasInfo or RevertableProperty NoInfo. Transition guide: - If you define a RevertableProperty, expect some type check failures like: "Expecting one more argument to ‘RevertableProperty’". - Change it to "RevertableProperty NoInfo" - The compiler will then tell you if it needs "HasInfo" instead. - If you have code that uses the RevertableProperty constructor that fails to type check, use the more powerful <!> operator
2015-10-21fix build warningsJoey Hess
2015-10-21Added Ssh properties to remove authorized_keys and known_hosts lines.Joey Hess
And use when reverting conductor property. Note that I didn't convert existing ssh properties to RevertablePropery because the API change was too annoying to work through.
2015-10-21Rewrote Propellor.Property.ControlHeir one more time, renaming it to ↵Joey Hess
Propellor.Property.Conductor. Wow, really.. So, this gets back to having properties that are added to hosts to say what they conduct. I think that conducts webservers `before` conducts dnsserver is an important thing to be able to express. Untested except for eyeballing the resulting Host data.