110 lines
2.7 KiB
Nix
110 lines
2.7 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services;
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dnschainConf = pkgs.writeText "dnschain.conf" ''
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[log]
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level=info
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[dns]
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host = 127.0.0.1
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port = 5333
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oldDNSMethod = NO_OLD_DNS
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# TODO: check what that address is acutally used for
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externalIP = 127.0.0.1
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[http]
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host = 127.0.0.1
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port=8088
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tlsPort=4443
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'';
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in
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{
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###### interface
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options = {
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services.dnschain = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to run dnschain. That implies running
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namecoind as well, so make sure to configure
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it appropriately.
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'';
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};
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};
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services.dnsmasq = {
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resolveDnschainQueries = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Resolve <literal>.bit</literal> top-level domains
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with dnschain and namecoind.
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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 cfg.dnschain.enable {
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services.namecoind.enable = true;
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services.dnsmasq.servers = optionals cfg.dnsmasq.resolveDnschainQueries [ "/.bit/127.0.0.1#5333" ];
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users.extraUsers = singleton
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{ name = "dnschain";
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uid = config.ids.uids.dnschain;
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extraGroups = [ "namecoin" ];
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description = "Dnschain daemon user";
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home = "/var/lib/dnschain";
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createHome = true;
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};
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systemd.services.dnschain = {
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description = "Dnschain Daemon";
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after = [ "namecoind.target" ];
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wantedBy = [ "multi-user.target" ];
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path = [ pkgs.openssl ];
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preStart = ''
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# Link configuration file into dnschain HOME directory
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if [ "$(${pkgs.coreutils}/bin/realpath /var/lib/dnschain/.dnschain.conf)" != "${dnschainConf}" ]; then
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rm -rf /var/lib/dnschain/.dnschain.conf
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ln -s ${dnschainConf} /var/lib/dnschain/.dnschain.conf
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fi
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# Create empty namecoin.conf so that dnschain is not
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# searching for /etc/namecoin/namecoin.conf
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if [ ! -e /var/lib/dnschain/.namecoin/namecoin.conf ]; then
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mkdir -p /var/lib/dnschain/.namecoin
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touch /var/lib/dnschain/.namecoin/namecoin.conf
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fi
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'';
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serviceConfig = {
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Type = "simple";
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User = "dnschain";
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EnvironmentFile = config.services.namecoind.userFile;
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ExecStart = "${pkgs.dnschain}/bin/dnschain --rpcuser=\${USER} --rpcpassword=\${PASSWORD} --rpcport=8336";
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ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
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ExecStop = "${pkgs.coreutils}/bin/kill -KILL $MAINPID";
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};
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};
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};
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}
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