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# Configuration for the Name Service Switch (/etc/nsswitch.conf).
{ config, lib, pkgs, ... }:
with lib;
let
inherit (config.services.avahi) nssmdns;
inherit (config.services.samba) nsswins;
ldap = config.users.ldap.enable;
in
{
options = {
# NSS modules. Hacky!
system.nssModules = mkOption {
type = types.listOf types.path;
internal = true;
default = [];
description = ''
Search path for NSS (Name Service Switch) modules. This allows
several DNS resolution methods to be specified via
<filename>/etc/nsswitch.conf</filename>.
'';
apply = list:
{
inherit list;
path = makeLibraryPath list;
};
};
};
config = {
# Name Service Switch configuration file. Required by the C
# library. !!! Factor out the mdns stuff. The avahi module
# should define an option used by this module.
environment.etc."nsswitch.conf".text =
''
passwd: files ${optionalString ldap "ldap"}
group: files ${optionalString ldap "ldap"}
shadow: files ${optionalString ldap "ldap"}
hosts: files ${optionalString nssmdns "mdns_minimal [NOTFOUND=return]"} dns ${optionalString nssmdns "mdns"} ${optionalString nsswins "wins"} myhostname mymachines
networks: files dns
ethers: files
services: files
protocols: files
'';
# Systemd provides nss-myhostname to ensure that our hostname
# always resolves to a valid IP address. It returns all locally
# configured IP addresses, or ::1 and 127.0.0.2 as
# fallbacks. Systemd also provides nss-mymachines to return IP
# addresses of local containers.
system.nssModules = [ config.systemd.package ];
};
}
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