aca8225e3b
event is emitted by dhclient and by the network-interfaces job in case of statically configured interfaces. Invalidating the cache is necessary to get rid of negative queries. svn path=/nixos/trunk/; revision=31779
72 lines
1.3 KiB
Nix
72 lines
1.3 KiB
Nix
{pkgs, config, ...}:
|
||
|
||
with pkgs.lib;
|
||
|
||
let
|
||
|
||
nssModulesPath = config.system.nssModules.path;
|
||
|
||
inherit (pkgs.lib) singleton;
|
||
|
||
in
|
||
|
||
{
|
||
|
||
###### interface
|
||
|
||
options = {
|
||
|
||
services.nscd = {
|
||
|
||
enable = mkOption {
|
||
default = true;
|
||
description = "
|
||
Whether to enable the Name Service Cache Daemon.
|
||
";
|
||
};
|
||
|
||
};
|
||
|
||
};
|
||
|
||
###### implementation
|
||
|
||
config = mkIf config.services.nscd.enable {
|
||
|
||
users.extraUsers = singleton
|
||
{ name = "nscd";
|
||
uid = config.ids.uids.nscd;
|
||
description = "Name service cache daemon user";
|
||
};
|
||
|
||
jobs.nscd =
|
||
{ description = "Name Service Cache Daemon";
|
||
|
||
startOn = "startup";
|
||
|
||
environment = { LD_LIBRARY_PATH = nssModulesPath; };
|
||
|
||
preStart =
|
||
''
|
||
mkdir -m 0755 -p /var/run/nscd
|
||
mkdir -m 0755 -p /var/db/nscd
|
||
'';
|
||
|
||
path = [ pkgs.glibc ];
|
||
|
||
exec = "nscd -f ${./nscd.conf} -d 2> /dev/null";
|
||
};
|
||
|
||
# Flush nscd's ‘hosts’ database when the network comes up to get
|
||
# rid of any negative entries.
|
||
jobs.invalidate_nscd =
|
||
{ name = "invalidate-nscd";
|
||
description = "Invalidate NSCD cache";
|
||
startOn = "ip-up";
|
||
task = true;
|
||
exec = "${pkgs.glibc}/sbin/nscd --invalidate hosts";
|
||
};
|
||
|
||
};
|
||
}
|