118 lines
3.1 KiB
Nix
118 lines
3.1 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.memcached;
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memcached = pkgs.memcached;
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in
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{
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###### interface
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options = {
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services.memcached = {
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enable = mkEnableOption "Memcached";
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user = mkOption {
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type = types.str;
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default = "memcached";
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description = lib.mdDoc "The user to run Memcached as";
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};
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listen = mkOption {
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type = types.str;
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default = "127.0.0.1";
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description = lib.mdDoc "The IP address to bind to.";
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};
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port = mkOption {
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type = types.port;
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default = 11211;
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description = lib.mdDoc "The port to bind to.";
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};
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enableUnixSocket = mkEnableOption "unix socket at /run/memcached/memcached.sock";
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maxMemory = mkOption {
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type = types.ints.unsigned;
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default = 64;
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description = lib.mdDoc "The maximum amount of memory to use for storage, in megabytes.";
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};
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maxConnections = mkOption {
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type = types.ints.unsigned;
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default = 1024;
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description = lib.mdDoc "The maximum number of simultaneous connections.";
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};
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extraOptions = mkOption {
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type = types.listOf types.str;
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default = [];
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description = lib.mdDoc "A list of extra options that will be added as a suffix when running memcached.";
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};
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};
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};
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###### implementation
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config = mkIf config.services.memcached.enable {
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users.users = optionalAttrs (cfg.user == "memcached") {
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memcached.description = "Memcached server user";
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memcached.isSystemUser = true;
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memcached.group = "memcached";
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};
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users.groups = optionalAttrs (cfg.user == "memcached") { memcached = {}; };
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environment.systemPackages = [ memcached ];
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systemd.services.memcached = {
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description = "Memcached server";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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serviceConfig = {
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ExecStart =
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let
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networking = if cfg.enableUnixSocket
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then "-s /run/memcached/memcached.sock"
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else "-l ${cfg.listen} -p ${toString cfg.port}";
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in "${memcached}/bin/memcached ${networking} -m ${toString cfg.maxMemory} -c ${toString cfg.maxConnections} ${concatStringsSep " " cfg.extraOptions}";
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User = cfg.user;
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# Filesystem access
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ProtectSystem = "strict";
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ProtectHome = true;
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PrivateTmp = true;
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PrivateDevices = true;
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ProtectKernelTunables = true;
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ProtectKernelModules = true;
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ProtectControlGroups = true;
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RuntimeDirectory = "memcached";
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# Caps
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CapabilityBoundingSet = "";
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NoNewPrivileges = true;
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# Misc.
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LockPersonality = true;
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RestrictRealtime = true;
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PrivateMounts = true;
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MemoryDenyWriteExecute = true;
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};
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};
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};
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imports = [
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(mkRemovedOptionModule ["services" "memcached" "socket"] ''
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This option was replaced by a fixed unix socket path at /run/memcached/memcached.sock enabled using services.memcached.enableUnixSocket.
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'')
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];
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}
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