modules/redis.nix


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{
  config,
  lib,
  ...
}:
let
  cfg = config.nixfiles.modules.redis;
in
{
  options.nixfiles.modules.redis.enable = lib.mkEnableOption "Redis";

  config = lib.mkIf cfg.enable {
    ark.directories = [ "/var/lib/redis-default" ];

    services = {
      redis = {
        servers.default = {
          enable = true;
          bind = "127.0.0.1";
          port = 6379;
        };
        vmOverCommit = true;
      };

      prometheus.exporters = {
        redis = {
          enable = true;
          listenAddress = "127.0.0.1";
          port = 9121;
          extraFlags = with config.services.redis.servers.default; [
            "--redis.addr=redis://${bind}:${toString port}"
            "--redis.user=${user}"
          ];
        };
      };
    };

    systemd.services.alloy.reloadTriggers = [ config.environment.etc."alloy/redis.alloy".source ];

    environment.etc."alloy/redis.alloy".text = with config.services.prometheus.exporters.redis; ''
      prometheus.scrape "redis" {
        targets = [
          {
            __address__ = "${listenAddress}:${toString port}",
            instance    = "${config.networking.hostName}",
          },
        ]
        forward_to = [prometheus.relabel.default.receiver]
      }
    '';
  };
}