machines/mermet/redis.nix

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