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.
-- <>
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 $
                `File.mode` combineModes (readModes ++ executeModes)