pyrox.dev
1{ config, lib, pkgs, ... }:
2
3with lib;
4
5let
6 cfg = config.services.rethinkdb;
7 rethinkdb = cfg.package;
8in
9
10{
11
12 ###### interface
13
14 options = {
15
16 services.rethinkdb = {
17
18 enable = mkOption {
19 default = false;
20 description = "Whether to enable the RethinkDB server.";
21 };
22
23 #package = mkOption {
24 # default = pkgs.rethinkdb;
25 # description = "Which RethinkDB derivation to use.";
26 #};
27
28 user = mkOption {
29 default = "rethinkdb";
30 description = "User account under which RethinkDB runs.";
31 };
32
33 group = mkOption {
34 default = "rethinkdb";
35 description = "Group which rethinkdb user belongs to.";
36 };
37
38 dbpath = mkOption {
39 default = "/var/db/rethinkdb";
40 description = "Location where RethinkDB stores its data, 1 data directory per instance.";
41 };
42
43 pidpath = mkOption {
44 default = "/var/run/rethinkdb";
45 description = "Location where each instance's pid file is located.";
46 };
47
48 #cfgpath = mkOption {
49 # default = "/etc/rethinkdb/instances.d";
50 # description = "Location where RethinkDB stores it config files, 1 config file per instance.";
51 #};
52
53 # TODO: currently not used by our implementation.
54 #instances = mkOption {
55 # type = types.attrsOf types.str;
56 # default = {};
57 # description = "List of named RethinkDB instances in our cluster.";
58 #};
59
60 };
61
62 };
63
64 ###### implementation
65 config = mkIf config.services.rethinkdb.enable {
66
67 environment.systemPackages = [ rethinkdb ];
68
69 systemd.services.rethinkdb = {
70 description = "RethinkDB server";
71
72 wantedBy = [ "multi-user.target" ];
73 after = [ "network.target" ];
74
75 serviceConfig = {
76 # TODO: abstract away 'default', which is a per-instance directory name
77 # allowing end user of this nix module to provide multiple instances,
78 # and associated directory per instance
79 ExecStart = "${rethinkdb}/bin/rethinkdb -d ${cfg.dbpath}/default";
80 ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
81 User = cfg.user;
82 Group = cfg.group;
83 PIDFile = "${cfg.pidpath}/default.pid";
84 PermissionsStartOnly = true;
85 };
86
87 preStart = ''
88 if ! test -e ${cfg.dbpath}; then
89 install -d -m0755 -o ${cfg.user} -g ${cfg.group} ${cfg.dbpath}
90 install -d -m0755 -o ${cfg.user} -g ${cfg.group} ${cfg.dbpath}/default
91 chown -R ${cfg.user}:${cfg.group} ${cfg.dbpath}
92 fi
93 if ! test -e "${cfg.pidpath}/default.pid"; then
94 install -D -o ${cfg.user} -g ${cfg.group} /dev/null "${cfg.pidpath}/default.pid"
95 fi
96 '';
97 };
98
99 users.extraUsers.rethinkdb = mkIf (cfg.user == "rethinkdb")
100 { name = "rethinkdb";
101 description = "RethinkDB server user";
102 };
103
104 users.extraGroups = optionalAttrs (cfg.group == "rethinkdb") (singleton
105 { name = "rethinkdb";
106 });
107
108 };
109
110}