    module Propellor.Property.HostingProvider.Linode where

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

    -- | 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 = "/etc/default/grub" `File.containsLines`
    	[ "GRUB_CMDLINE_LINUX=\"console=ttyS0,19200n8\""
    	, "GRUB_DISABLE_LINUX_UUID=true"
    	, "GRUB_SERIAL_COMMAND=\"serial --speed=19200 --unit=0 --word=8 --parity=no --stop=1\""
    	, "GRUB_TERMINAL=serial"
    	]
    	`onChange` Grub.mkConfig
    	`requires` Grub.installed Grub.PC
    	`describe` "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 = Grub.chainPVGrub "hd0" "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 = tightenTargets $
    	"/etc/cron.daily/mlocate"
    		`File.mode` combineModes (readModes ++ executeModes)