nixpkgs/nixos/modules/services/databases/memcached.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

99 lines
2.1 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.memcached;
memcached = pkgs.memcached;
in
{
###### interface
options = {
services.memcached = {
enable = mkOption {
default = false;
description = "
Whether to enable Memcached.
";
};
user = mkOption {
default = "memcached";
description = "The user to run Memcached as";
};
listen = mkOption {
default = "127.0.0.1";
description = "The IP address to bind to";
};
port = mkOption {
default = 11211;
description = "The port to bind to";
};
socket = mkOption {
default = "";
description = "Unix socket path to listen on. Setting this will disable network support";
example = "/var/run/memcached";
};
maxMemory = mkOption {
default = 64;
description = "The maximum amount of memory to use for storage, in megabytes.";
};
maxConnections = mkOption {
default = 1024;
description = "The maximum number of simultaneous connections";
};
extraOptions = mkOption {
default = [];
description = "A list of extra options that will be added as a suffix when running memcached";
};
};
};
###### implementation
config = mkIf config.services.memcached.enable {
users.extraUsers.memcached =
{ name = cfg.user;
uid = config.ids.uids.memcached;
description = "Memcached server user";
};
environment.systemPackages = [ memcached ];
systemd.services.memcached =
{ description = "Memcached server";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
serviceConfig = {
ExecStart =
let
networking = if cfg.socket != ""
then "-s ${cfg.socket}"
else "-l ${cfg.listen} -p ${toString cfg.port}";
in "${memcached}/bin/memcached ${networking} -m ${toString cfg.maxMemory} -c ${toString cfg.maxConnections} ${concatStringsSep " " cfg.extraOptions}";
User = cfg.user;
};
};
};
}