nixpkgs/nixos/modules/services/databases/monetdb.nix
Eelco Dolstra 29027fd1e1 Rewrite ‘with pkgs.lib’ -> ‘with lib’
Using pkgs.lib on the spine of module evaluation is problematic
because the pkgs argument depends on the result of module
evaluation. To prevent an infinite recursion, pkgs and some of the
modules are evaluated twice, which is inefficient. Using ‘with lib’
prevents this problem.
2014-04-14 16:26:48 +02:00

89 lines
2.0 KiB
Nix

{ config, lib, pkgs, ... }:
let
cfg = config.services.monetdb;
monetdbUser = "monetdb";
in
with lib;
{
###### interface
options = {
services.monetdb = {
enable = mkOption {
type = types.bool;
default = false;
description = "Whether to enable MonetDB database server.";
};
package = mkOption {
type = types.path;
description = "MonetDB package to use.";
};
dbfarmDir = mkOption {
type = types.path;
default = "/var/lib/monetdb";
description = ''
Specifies location of Monetdb dbfarm (keeps database and auxiliary files).
'';
};
port = mkOption {
default = "50000";
example = "50000";
description = "Port to listen on.";
};
};
};
###### implementation
config = mkIf cfg.enable {
users.extraUsers.monetdb =
{ name = monetdbUser;
uid = config.ids.uids.monetdb;
description = "monetdb user";
home = cfg.dbfarmDir;
};
users.extraGroups.monetdb.gid = config.ids.gids.monetdb;
environment.systemPackages = [ cfg.package ];
systemd.services.monetdb =
{ description = "MonetDB Server";
wantedBy = [ "multi-user.target" ];
after = [ "network.target" ];
path = [ cfg.package ];
preStart =
''
# Initialise the database.
if ! test -e ${cfg.dbfarmDir}/.merovingian_properties; then
mkdir -m 0700 -p ${cfg.dbfarmDir}
chown -R ${monetdbUser} ${cfg.dbfarmDir}
${cfg.package}/bin/monetdbd create ${cfg.dbfarmDir}
${cfg.package}/bin/monetdbd set port=${cfg.port} ${cfg.dbfarmDir}
fi
'';
serviceConfig.ExecStart = "${cfg.package}/bin/monetdbd start -n ${cfg.dbfarmDir}";
serviceConfig.ExecStop = "${cfg.package}/bin/monetdbd stop ${cfg.dbfarmDir}";
unitConfig.RequiresMountsFor = "${cfg.dbfarmDir}";
};
};
}