{ config, lib, pkgs, ... }: with lib; let cfg = config.services.riak; in { ###### interface options = { services.riak = { enable = mkEnableOption "riak"; package = mkOption { type = types.package; example = literalExample "pkgs.riak2"; description = '' Riak package to use. ''; }; nodeName = mkOption { type = types.string; default = "riak@127.0.0.1"; description = '' Name of the Erlang node. ''; }; distributedCookie = mkOption { type = types.string; default = "riak"; description = '' Cookie for distributed node communication. All nodes in the same cluster should use the same cookie or they will not be able to communicate. ''; }; dataDir = mkOption { type = types.path; default = "/var/db/riak"; description = '' Data directory for Riak. ''; }; logDir = mkOption { type = types.path; default = "/var/log/riak"; description = '' Log directory for Riak. ''; }; extraConfig = mkOption { type = types.lines; default = ""; description = '' Additional text to be appended to riak.conf. ''; }; }; }; ###### implementation config = mkIf cfg.enable { environment.systemPackages = [ cfg.package ]; environment.etc."riak/riak.conf".text = '' nodename = ${cfg.nodeName} distributed_cookie = ${cfg.distributedCookie} platform_log_dir = ${cfg.logDir} platform_etc_dir = /etc/riak platform_data_dir = ${cfg.dataDir} ${cfg.extraConfig} ''; users.extraUsers.riak = { name = "riak"; uid = config.ids.uids.riak; group = "riak"; description = "Riak server user"; }; users.extraGroups.riak.gid = config.ids.gids.riak; systemd.services.riak = { description = "Riak Server"; wantedBy = [ "multi-user.target" ]; after = [ "network.target" ]; path = [ pkgs.utillinux # for `logger` pkgs.bash ]; environment.RIAK_DATA_DIR = "${cfg.dataDir}"; environment.RIAK_LOG_DIR = "${cfg.logDir}"; environment.RIAK_ETC_DIR = "/etc/riak"; preStart = '' if ! test -e ${cfg.logDir}; then mkdir -m 0755 -p ${cfg.logDir} chown -R riak ${cfg.logDir} fi if ! test -e ${cfg.dataDir}; then mkdir -m 0700 -p ${cfg.dataDir} chown -R riak ${cfg.dataDir} fi ''; serviceConfig = { ExecStart = "${cfg.package}/bin/riak console"; ExecStop = "${cfg.package}/bin/riak stop"; StandardInput = "tty"; User = "riak"; Group = "riak"; PermissionsStartOnly = true; # Give Riak a decent amount of time to clean up. TimeoutStopSec = 120; LimitNOFILE = 65536; }; unitConfig.RequiresMountsFor = [ "${cfg.dataDir}" "${cfg.logDir}" "/etc/riak" ]; }; }; }