pyrox.dev
1{
2 config,
3 lib,
4 pkgs,
5 ...
6}:
7let
8 cfg = config.services.rethinkdb;
9 rethinkdb = cfg.package;
10in
11
12{
13
14 ###### interface
15
16 options = {
17
18 services.rethinkdb = {
19
20 enable = lib.mkEnableOption "RethinkDB server";
21
22 #package = lib.mkOption {
23 # default = pkgs.rethinkdb;
24 # description = "Which RethinkDB derivation to use.";
25 #};
26
27 user = lib.mkOption {
28 default = "rethinkdb";
29 description = "User account under which RethinkDB runs.";
30 };
31
32 group = lib.mkOption {
33 default = "rethinkdb";
34 description = "Group which rethinkdb user belongs to.";
35 };
36
37 dbpath = lib.mkOption {
38 default = "/var/db/rethinkdb";
39 description = "Location where RethinkDB stores its data, 1 data directory per instance.";
40 };
41
42 pidpath = lib.mkOption {
43 default = "/run/rethinkdb";
44 description = "Location where each instance's pid file is located.";
45 };
46
47 #cfgpath = lib.mkOption {
48 # default = "/etc/rethinkdb/instances.d";
49 # description = "Location where RethinkDB stores it config files, 1 config file per instance.";
50 #};
51
52 # TODO: currently not used by our implementation.
53 #instances = lib.mkOption {
54 # type = lib.types.attrsOf lib.types.str;
55 # default = {};
56 # description = "List of named RethinkDB instances in our cluster.";
57 #};
58
59 };
60
61 };
62
63 ###### implementation
64 config = lib.mkIf config.services.rethinkdb.enable {
65
66 environment.systemPackages = [ rethinkdb ];
67
68 systemd.services.rethinkdb = {
69 description = "RethinkDB server";
70
71 wantedBy = [ "multi-user.target" ];
72 after = [ "network.target" ];
73
74 serviceConfig = {
75 # TODO: abstract away 'default', which is a per-instance directory name
76 # allowing end user of this nix module to provide multiple instances,
77 # and associated directory per instance
78 ExecStart = "${rethinkdb}/bin/rethinkdb -d ${cfg.dbpath}/default";
79 ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
80 User = cfg.user;
81 Group = cfg.group;
82 PIDFile = "${cfg.pidpath}/default.pid";
83 PermissionsStartOnly = true;
84 };
85
86 preStart = ''
87 if ! test -e ${cfg.dbpath}; then
88 install -d -m0755 -o ${cfg.user} -g ${cfg.group} ${cfg.dbpath}
89 install -d -m0755 -o ${cfg.user} -g ${cfg.group} ${cfg.dbpath}/default
90 chown -R ${cfg.user}:${cfg.group} ${cfg.dbpath}
91 fi
92 if ! test -e "${cfg.pidpath}/default.pid"; then
93 install -D -o ${cfg.user} -g ${cfg.group} /dev/null "${cfg.pidpath}/default.pid"
94 fi
95 '';
96 };
97
98 users.users.rethinkdb = lib.mkIf (cfg.user == "rethinkdb") {
99 name = "rethinkdb";
100 description = "RethinkDB server user";
101 isSystemUser = true;
102 };
103
104 users.groups = lib.optionalAttrs (cfg.group == "rethinkdb") (
105 lib.singleton {
106 name = "rethinkdb";
107 }
108 );
109
110 };
111
112}