3
0
Fork 0
forked from mirrors/nixpkgs
nixpkgs/nixos/modules/services/network-filesystems/drbd.nix
Eelco Dolstra 29027fd1e1 Rewrite ‘with pkgs.lib’ -> ‘with lib’
Using pkgs.lib on the spine of module evaluation is problematic
because the pkgs argument depends on the result of module
evaluation. To prevent an infinite recursion, pkgs and some of the
modules are evaluated twice, which is inefficient. Using ‘with lib’
prevents this problem.
2014-04-14 16:26:48 +02:00

78 lines
1.5 KiB
Nix

# Support for DRBD, the Distributed Replicated Block Device.
{ config, lib, pkgs, ... }:
with lib;
let cfg = config.services.drbd; in
{
###### interface
options = {
services.drbd.enable = mkOption {
default = false;
type = types.bool;
description = ''
Whether to enable support for DRBD, the Distributed Replicated
Block Device.
'';
};
services.drbd.config = mkOption {
default = "";
type = types.string;
description = ''
Contents of the <filename>drbd.conf</filename> configuration file.
'';
};
};
###### implementation
config = mkIf cfg.enable {
environment.systemPackages = [ pkgs.drbd ];
services.udev.packages = [ pkgs.drbd ];
boot.kernelModules = [ "drbd" ];
boot.extraModprobeConfig =
''
options drbd usermode_helper=/run/current-system/sw/sbin/drbdadm
'';
environment.etc = singleton
{ source = pkgs.writeText "drbd.conf" cfg.config;
target = "drbd.conf";
};
jobs.drbd_up =
{ name = "drbd-up";
startOn = "stopped udevtrigger or ip-up";
task = true;
script =
''
${pkgs.drbd}/sbin/drbdadm up all
'';
};
jobs.drbd_down =
{ name = "drbd-down";
startOn = "starting shutdown";
task = true;
script =
''
${pkgs.drbd}/sbin/drbdadm down all
'';
};
};
}