90 lines
3.0 KiB
Nix
90 lines
3.0 KiB
Nix
{ config, pkgs, lib, user, host, ... }:
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lib.mkIf (host == "NxACE")
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{
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sops.secrets = {
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"nx2site/namecheap.pw" = { };
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};
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systemd = {
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timers."namecheap-dynamic-dns" = {
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wantedBy = [ "timers.target" ];
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timerConfig = {
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OnBootSec = "2m";
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OnUnitActiveSec = "10m";
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Unit = "namecheap-dynamic-dns.service";
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};
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};
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services."namecheap-dynamic-dns" =
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let
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u = let
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domain = "nx2.site";
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passord-file-path = config.sops.secrets."nx2site/namecheap.pw".path;
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log-file-path = "/var/log/update_namecheap.log";
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count-file-path = "/var/log/update_namecheap-count.txt";
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in
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pkgs.writers.writePython3Bin "update_namecheap" {
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libraries = with pkgs.python311Packages; [
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requests
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];
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flakeIgnore = [ "E501" "E305" "E701" "E704" "E302" "E114" "F841" ];
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} ''
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import requests
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import argparse
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import socket
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from datetime import datetime
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def get_public_ip(): return requests.get('https://ipinfo.io/ip').text.strip()
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def get_dns_ip(): return socket.gethostbyname_ex('${domain}')[2][0]
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def main(force_update):
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my_ip = get_public_ip()
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dns_ip = get_dns_ip()
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with open("${count-file-path}", "r") as f:
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content = f.read()
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if content == "": count = 0
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else: count = int(content)
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count += 1
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with open("${count-file-path}", "w") as f:
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f.write(str(count))
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if not (force_update or my_ip != dns_ip):
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print(f"Host IP and DNS response are both {my_ip} --> No Action")
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exit(0)
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else:
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with open("${passord-file-path}", 'r') as pw_file: pw = pw_file.read().strip()
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# Perform DNS updates
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resp_base = requests.get(f"https://dynamicdns.park-your-domain.com/update?host=@&domain=${domain}&password={pw}&ip={my_ip}")
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resp_subd = requests.get(f"https://dynamicdns.park-your-domain.com/update?host=*&domain=${domain}&password={pw}&ip={my_ip}")
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# Reset the count file
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with open("${count-file-path}", 'w') as f: f.write('0')
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now_str = datetime.now().strftime('%Y/%m/%d-%R')
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log_entry = f"At {now_str} - from {dns_ip} to {my_ip} - {count} times - Response {resp_base.status_code}{' - (forced)' if force_update else ' '}\n"
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print(log_entry, end="")
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with open("${log-file-path}", 'a') as log_file: log_file.write(log_entry)
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if __name__ == "__main__":
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parser = argparse.ArgumentParser()
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parser.add_argument('-f', '--force', action='store_true', help='Force update')
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args = parser.parse_args()
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main(args.force)
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'';
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in
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{
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script = ''
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set -eu
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${u}/bin/update_namecheap
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'';
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serviceConfig = {
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Type = "oneshot";
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# User = "nx2";
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};
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};
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};
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}
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