module Propellor.Property.HostingProvider.Linode where

import Propellor.Base
import qualified Propellor.Property.Grub as Grub
import qualified Propellor.Property.File as File

-- | Configures grub to use the serial console as set up by Linode.
-- Useful when running a distribution supplied kernel.
-- <https://www.linode.com/docs/tools-reference/custom-kernels-distros/run-a-distribution-supplied-kernel-with-kvm>
serialGrub :: Property (HasInfo + DebianLike)
serialGrub :: Property (HasInfo + DebianLike)
serialGrub = [Char]
"/etc/default/grub" [Char] -> [[Char]] -> Property UnixLike
`File.containsLines`
	[ [Char]
"GRUB_CMDLINE_LINUX=\"console=ttyS0,19200n8\""
	, [Char]
"GRUB_DISABLE_LINUX_UUID=true"
	, [Char]
"GRUB_SERIAL_COMMAND=\"serial --speed=19200 --unit=0 --word=8 --parity=no --stop=1\""
	, [Char]
"GRUB_TERMINAL=serial"
	]
	Property UnixLike
-> Property DebianLike
-> CombinedType (Property UnixLike) (Property DebianLike)
forall x y. Combines x y => x -> y -> CombinedType x y
`onChange` Property DebianLike
Grub.mkConfig
	Property DebianLike
-> Property
     (Sing '[ 'WithInfo, 'Targeting 'OSDebian, 'Targeting 'OSBuntish])
-> CombinedType
     (Property DebianLike)
     (Property
        (Sing '[ 'WithInfo, 'Targeting 'OSDebian, 'Targeting 'OSBuntish]))
forall x y. Combines x y => x -> y -> CombinedType x y
`requires` GrubTarget -> Property (HasInfo + DebianLike)
Grub.installed GrubTarget
Grub.PC
	Property
  (Sing '[ 'WithInfo, 'Targeting 'OSDebian, 'Targeting 'OSBuntish])
-> [Char]
-> Property
     (Sing '[ 'WithInfo, 'Targeting 'OSDebian, 'Targeting 'OSBuntish])
forall p. IsProp p => p -> [Char] -> p
`describe` [Char]
"GRUB configured for Linode serial console"

-- | Linode's pv-grub-x86_64 (only used for its older XEN instances)
-- does not support booting recent Debian kernels compressed
-- with xz. This sets up pv-grub chaining to enable it.
chainPVGrub :: Grub.TimeoutSecs -> Property (HasInfo + DebianLike)
chainPVGrub :: TimeoutSecs -> Property (HasInfo + DebianLike)
chainPVGrub = [Char] -> [Char] -> TimeoutSecs -> Property (HasInfo + DebianLike)
Grub.chainPVGrub [Char]
"hd0" [Char]
"xen/xvda"

-- | Linode disables mlocate's cron job's execute permissions,
-- presumably to avoid disk IO. This ensures it's executable.
mlocateEnabled :: Property DebianLike
mlocateEnabled :: Property DebianLike
mlocateEnabled = Property UnixLike -> Property DebianLike
forall (p :: * -> *) (untightened :: [MetaType])
       (tightened :: [MetaType]).
(TightenTargets p, TightenTargetsAllowed untightened tightened,
 SingI tightened) =>
p (MetaTypes untightened) -> p (MetaTypes tightened)
tightenTargets (Property UnixLike -> Property DebianLike)
-> Property UnixLike -> Property DebianLike
forall a b. (a -> b) -> a -> b
$
	[Char]
"/etc/cron.daily/mlocate"
		[Char] -> FileMode -> Property UnixLike
`File.mode` [FileMode] -> FileMode
combineModes ([FileMode]
readModes [FileMode] -> [FileMode] -> [FileMode]
forall a. [a] -> [a] -> [a]
++ [FileMode]
executeModes)