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|
{ config, lib, pkgs, ... }:
with lib;
let
cfgs = config.services;
cfg = cfgs.dnschain;
dataDir = "/var/lib/dnschain";
username = "dnschain";
configFile = pkgs.writeText "dnschain.conf" ''
[log]
level = info
[dns]
host = ${cfg.dns.address}
port = ${toString cfg.dns.port}
oldDNSMethod = NO_OLD_DNS
externalIP = ${cfg.dns.externalAddress}
[http]
host = ${cfg.api.hostname}
port = ${toString cfg.api.port}
tlsPort = ${toString cfg.api.tlsPort}
${cfg.extraConfig}
'';
in
{
###### interface
options = {
services.dnschain = {
enable = mkEnableOption ''
DNSChain, a blockchain based DNS + HTTP server.
To resolve .bit domains set <literal>services.namecoind.enable = true;</literal>
and an RPC username/password.
'';
dns.address = mkOption {
type = types.str;
default = "127.0.0.1";
description = ''
The IP address the DNSChain resolver will bind to.
Leave this unchanged if you do not wish to directly expose the resolver.
'';
};
dns.externalAddress = mkOption {
type = types.str;
default = cfg.dns.address;
description = ''
The IP address used by clients to reach the resolver and the value of
the <literal>namecoin.dns</literal> record. Set this in case the bind address
is not the actual IP address (e.g. the machine is behind a NAT).
'';
};
dns.port = mkOption {
type = types.int;
default = 5333;
description = ''
The port the DNSChain resolver will bind to.
'';
};
api.hostname = mkOption {
type = types.str;
default = "0.0.0.0";
description = ''
The hostname (or IP address) the DNSChain API server will bind to.
'';
};
api.port = mkOption {
type = types.int;
default = 8080;
description = ''
The port the DNSChain API server (HTTP) will bind to.
'';
};
api.tlsPort = mkOption {
type = types.int;
default = 4433;
description = ''
The port the DNSChain API server (HTTPS) will bind to.
'';
};
extraConfig = mkOption {
type = types.lines;
default = "";
example = ''
[log]
level = debug
'';
description = ''
Additional options that will be appended to the configuration file.
'';
};
};
services.dnsmasq.resolveDNSChainQueries = mkOption {
type = types.bool;
default = false;
description = ''
Resolve <literal>.bit</literal> top-level domains using DNSChain and namecoin.
'';
};
services.pdns-recursor.resolveDNSChainQueries = mkOption {
type = types.bool;
default = false;
description = ''
Resolve <literal>.bit</literal> top-level domains using DNSChain and namecoin.
'';
};
};
###### implementation
config = mkIf cfg.enable {
services.dnsmasq.servers = optionals cfgs.dnsmasq.resolveDNSChainQueries
[ "/.bit/127.0.0.1#${toString cfg.dns.port}"
"/.dns/127.0.0.1#${toString cfg.dns.port}"
];
services.pdns-recursor = mkIf cfgs.pdns-recursor.resolveDNSChainQueries {
forwardZonesRecurse =
{ bit = "127.0.0.1:${toString cfg.dns.port}";
dns = "127.0.0.1:${toString cfg.dns.port}";
};
luaConfig =''
addNTA("bit", "namecoin doesn't support DNSSEC")
addNTA("dns", "namecoin doesn't support DNSSEC")
'';
};
users.users.${username} = {
description = "DNSChain daemon user";
home = dataDir;
createHome = true;
uid = config.ids.uids.dnschain;
extraGroups = optional cfgs.namecoind.enable "namecoin";
};
systemd.services.dnschain = {
description = "DNSChain daemon";
after = optional cfgs.namecoind.enable "namecoind.target";
wantedBy = [ "multi-user.target" ];
serviceConfig = {
User = "dnschain";
Restart = "on-failure";
ExecStart = "${pkgs.nodePackages.dnschain}/bin/dnschain";
};
preStart = ''
# Link configuration file into dnschain home directory
configPath=${dataDir}/.dnschain/dnschain.conf
mkdir -p ${dataDir}/.dnschain
if [ "$(realpath $configPath)" != "${configFile}" ]; then
rm -f $configPath
ln -s ${configFile} $configPath
fi
'';
};
};
meta.maintainers = with lib.maintainers; [ rnhmjoj ];
}
|