modules: add redis service

2 files changed, 78 insertions, 2 deletions

diff --git a/default.nix b/default.nix
index a7a175b..477e232 100644
--- a/default.nix
+++ b/default.nix
@@ -40,14 +40,15 @@ let
         ./modules/launchd
         ./modules/security
         ./modules/services/activate-system
-        ./modules/services/khd
-        ./modules/services/kwm
         ./modules/services/chunkwm.nix
         ./modules/services/emacs.nix
+        ./modules/services/khd
+        ./modules/services/kwm
         ./modules/services/mopidy.nix
         ./modules/services/nix-daemon.nix
         ./modules/services/nix-gc
         ./modules/services/postgresql
+        ./modules/services/redis
         ./modules/programs/bash.nix
         ./modules/programs/fish.nix
         ./modules/programs/man.nix
diff --git a/modules/services/redis/default.nix b/modules/services/redis/default.nix
new file mode 100644
index 0000000..860ebc1
--- /dev/null
+++ b/modules/services/redis/default.nix
@@ -0,0 +1,75 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.redis;
+in
+
+{
+  options = {
+    services.redis.enable = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Whether to enable the redis database service.";
+    };
+
+    services.redis.package = mkOption {
+      type = types.path;
+      default = pkgs.redis;
+      defaultText = "pkgs.redis";
+      description = "This option specifies the redis package to use";
+    };
+
+    services.redis.dataDir = mkOption {
+      type = types.path;
+      default = "/var/lib/redis";
+      description = "Data directory for the redis database.";
+    };
+
+    services.redis.port = mkOption {
+      type = types.int;
+      default = 6379;
+      description = "The port for Redis to listen to.";
+    };
+
+    services.redis.bind = mkOption {
+      type = types.nullOr types.str;
+      default = null; # All interfaces
+      description = "The IP interface to bind to.";
+      example = "127.0.0.1";
+    };
+
+    services.redis.unixSocket = mkOption {
+      type = types.nullOr types.path;
+      default = null;
+      description = "The path to the socket to bind to.";
+      example = "/var/run/redis.sock";
+    };
+
+    services.redis.appendOnly = mkOption {
+      type = types.bool;
+      default = false;
+      description = "By default data is only periodically persisted to disk, enable this option to use an append-only file for improved persistence.";
+    };
+  };
+
+  config = mkIf cfg.enable {
+
+    environment.systemPackages = [ cfg.package ];
+
+    launchd.user.agents.redis = {
+      command = "${cfg.package}/bin/redis-server /etc/redis.conf";
+      serviceConfig.KeepAlive = true;
+    };
+
+    environment.etc."redis.conf".text = ''
+      port ${toString cfg.port}
+      ${optionalString (cfg.bind != null) "bind ${cfg.bind}"}
+      ${optionalString (cfg.unixSocket != null) "unixsocket ${cfg.unixSocket}"}
+      dir ${cfg.dataDir}
+      appendOnly ${if cfg.appendOnly then "yes" else "no"}
+    '';
+
+  };
+}