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