56373744b4
resolvconf prefers a locally running BIND resolver over the forwarders; we just have to tell it whether we have one or not. We use 'config.services.bind.enable' to make that decision, assuming that people are not going to configure a local BIND that won't respond to queries on 127.0.0.1. If we run into such a (weird) case, then we'll need to introduce another variable for that purpose which can be set independently from 'config.services.bind.enable'.
79 lines
2.1 KiB
Nix
79 lines
2.1 KiB
Nix
# /etc files related to networking, such as /etc/services.
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{config, pkgs, ...}:
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with pkgs.lib;
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let
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cfg = config.networking;
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options = {
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networking.extraHosts = pkgs.lib.mkOption {
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default = "";
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example = "192.168.0.1 lanlocalhost";
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description = ''
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Additional entries to be appended to <filename>/etc/hosts</filename>.
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'';
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};
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};
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localhostWithDomain = optionalString (cfg.domain != "")
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"localhost.${cfg.domain}";
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hostnameWithDomain = optionalString
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(cfg.domain != "" && cfg.hostName != "")
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"${cfg.hostName}.${cfg.domain}";
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in
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{
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require = [options];
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environment.etc =
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[ { # /etc/services: TCP/UDP port assignments.
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source = pkgs.iana_etc + "/etc/services";
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target = "services";
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}
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{ # /etc/protocols: IP protocol numbers.
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source = pkgs.iana_etc + "/etc/protocols";
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target = "protocols";
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}
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{ # /etc/rpc: RPC program numbers.
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source = pkgs.glibc + "/etc/rpc";
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target = "rpc";
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}
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{ # /etc/hosts: Hostname-to-IP mappings.
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source = pkgs.writeText "hosts"
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''
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${optionalString (cfg.hostName != "")
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"127.0.0.1 ${hostnameWithDomain} ${cfg.hostName}"}
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127.0.0.1 localhost ${localhostWithDomain}
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${cfg.extraHosts}
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'';
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target = "hosts";
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}
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{ # /etc/resolvconf.conf: Configuration for openresolv.
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source = pkgs.writeText "resolvconf.conf" (
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''
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# This is the default, but we must set it here to prevent
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# a collision with an apparently unrelated environment
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# variable with the same name exported by dhcpcd.
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interface_order='lo lo[0-9]*'
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'' + optionalString config.services.nscd.enable ''
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# Invalidate the nscd cache whenever resolv.conf is
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# regenerated.
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libc_restart='${pkgs.upstart}/sbin/start invalidate-nscd'
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'' + optionalString config.services.bind.enable ''
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# This hosts runs a full-blown DNS resolver.
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name_servers='127.0.0.1'
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'' );
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target = "resolvconf.conf";
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}
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];
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}
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