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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.rethinkdb;
rethinkdb = cfg.package;
in
{
###### interface
options = {
services.rethinkdb = {
enable = mkEnableOption "RethinkDB server";
#package = mkOption {
# default = pkgs.rethinkdb;
# description = "Which RethinkDB derivation to use.";
#};
user = mkOption {
default = "rethinkdb";
description = "User account under which RethinkDB runs.";
};
group = mkOption {
default = "rethinkdb";
description = "Group which rethinkdb user belongs to.";
};
dbpath = mkOption {
default = "/var/db/rethinkdb";
description = "Location where RethinkDB stores its data, 1 data directory per instance.";
};
pidpath = mkOption {
default = "/run/rethinkdb";
description = "Location where each instance's pid file is located.";
};
#cfgpath = mkOption {
# default = "/etc/rethinkdb/instances.d";
# description = "Location where RethinkDB stores it config files, 1 config file per instance.";
#};
# TODO: currently not used by our implementation.
#instances = mkOption {
# type = types.attrsOf types.str;
# default = {};
# description = "List of named RethinkDB instances in our cluster.";
#};
};
};
###### implementation
config = mkIf config.services.rethinkdb.enable {
environment.systemPackages = [ rethinkdb ];
systemd.services.rethinkdb = {
description = "RethinkDB server";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
serviceConfig = {
# TODO: abstract away 'default', which is a per-instance directory name
# allowing end user of this nix module to provide multiple instances,
# and associated directory per instance
ExecStart = "${rethinkdb}/bin/rethinkdb -d ${cfg.dbpath}/default";
ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
User = cfg.user;
Group = cfg.group;
PIDFile = "${cfg.pidpath}/default.pid";
PermissionsStartOnly = true;
};
preStart = ''
if ! test -e ${cfg.dbpath}; then
install -d -m0755 -o ${cfg.user} -g ${cfg.group} ${cfg.dbpath}
install -d -m0755 -o ${cfg.user} -g ${cfg.group} ${cfg.dbpath}/default
chown -R ${cfg.user}:${cfg.group} ${cfg.dbpath}
fi
if ! test -e "${cfg.pidpath}/default.pid"; then
install -D -o ${cfg.user} -g ${cfg.group} /dev/null "${cfg.pidpath}/default.pid"
fi
'';
};
users.users.rethinkdb = mkIf (cfg.user == "rethinkdb")
{ name = "rethinkdb";
description = "RethinkDB server user";
isSystemUser = true;
};
users.groups = optionalAttrs (cfg.group == "rethinkdb") (singleton
{ name = "rethinkdb";
});
};
}
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