hosts/mermet/redis.nix

   1 { pkgs, lib, config, ... }:
   2 let
   3   inherit (config.users) users;
   4 in
   5 {
   6 fileSystems."/var/lib/redis" = {
   7   device = "rpool/var/redis";
   8   fsType = "zfs";
   9 };
  10
  11 services.redis = {
  12   enable = true;
  13   unixSocket = "/run/redis/redis.socket";
  14   databases = 16;
  15   syslog = true;
  16   bind = "127.0.0.1 ::1";
  17   settings = {
  18     unixsocketperm = "660";
  19     maxclients = 1024;
  20     maxmemory = "500mb";
  21     maxmemory-policy = "volatile-ttl";
  22   };
  23 };
  24
  25 users.users.redis.group = "redis";
  26 users.groups."redis" = {};
  27
  28 systemd.services.redis.serviceConfig = {
  29   RuntimeDirectoryMode = "0750";
  30   Group = users.redis.group;
  31 };
  32
  33 # As suggested by redis in its logs
  34 boot.kernel.sysctl."vm.overcommit_memory" = 1;
  35 system.activationScripts.redis = ''
  36   echo never >/sys/kernel/mm/transparent_hugepage/enabled
  37 '';
  38 }