nixpkgs/nixos/modules/services/databases/opentsdb.nix

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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.opentsdb;
configFile = pkgs.writeText "opentsdb.conf" cfg.config;
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in {
###### interface
options = {
services.opentsdb = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to run OpenTSDB.
'';
};
package = mkOption {
type = types.package;
default = pkgs.opentsdb;
defaultText = "pkgs.opentsdb";
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example = literalExample "pkgs.opentsdb";
description = ''
OpenTSDB package to use.
'';
};
user = mkOption {
type = types.string;
default = "opentsdb";
description = ''
User account under which OpenTSDB runs.
'';
};
group = mkOption {
type = types.string;
default = "opentsdb";
description = ''
Group account under which OpenTSDB runs.
'';
};
port = mkOption {
type = types.int;
default = 4242;
description = ''
Which port OpenTSDB listens on.
'';
};
config = mkOption {
type = types.lines;
default = ''
tsd.core.auto_create_metrics = true
tsd.http.request.enable_chunked = true
'';
description = ''
The contents of OpenTSDB's configuration file
'';
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};
};
};
###### implementation
config = mkIf config.services.opentsdb.enable {
systemd.services.opentsdb = {
description = "OpenTSDB Server";
wantedBy = [ "multi-user.target" ];
requires = [ "hbase.service" ];
environment.JAVA_HOME = "${pkgs.jre}";
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path = [ pkgs.gnuplot ];
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preStart =
''
COMPRESSION=NONE HBASE_HOME=${config.services.hbase.package} ${cfg.package}/share/opentsdb/tools/create_table.sh
'';
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serviceConfig = {
PermissionsStartOnly = true;
User = cfg.user;
Group = cfg.group;
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ExecStart = "${cfg.package}/bin/tsdb tsd --staticroot=${cfg.package}/share/opentsdb/static --cachedir=/tmp/opentsdb --port=${toString cfg.port} --config=${configFile}";
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};
};
users.extraUsers.opentsdb = {
description = "OpenTSDB Server user";
group = "opentsdb";
uid = config.ids.uids.opentsdb;
};
users.extraGroups.opentsdb.gid = config.ids.gids.opentsdb;
};
}