46 lines
1.5 KiB
Nix
46 lines
1.5 KiB
Nix
{ config, pkgs, lib, ... }:
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let
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cfg = config.services.domeneshop-dyndns;
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in {
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options.services.domeneshop-dyndns = {
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enable = lib.mkEnableOption "Domeneshop DynDNS";
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domain = lib.mkOption {
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type = lib.types.str;
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description = "Domain name to configure";
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};
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netrcFile = lib.mkOption {
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type = lib.types.path;
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description = "Path to the file that contains `machine api.domeneshop.no login <DDNS_TOKEN> password <DDNS_SECRET>` from https://domene.shop/admin?view=api";
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};
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startAt = lib.mkOption {
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type = lib.types.str;
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default = "*:0/10"; # Every 10 minutes
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description = "Systemd onCalendar expression for when to run the timer";
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};
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};
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config = lib.mkIf cfg.enable {
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systemd.services.domeneshop-dyndns = {
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serviceConfig.LoadCredential = "netrc:${cfg.netrcFile}";
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startAt = cfg.startAt;
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script = ''
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DNSNAME="${cfg.domain}"
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NEW_IP="$(${lib.getExe pkgs.curl} --silent https://ipinfo.io/ip)"
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OLD_IP="$(${lib.getExe pkgs.getent} hosts "$DNSNAME" | ${lib.getExe pkgs.gawk} '{ print $1 }')"
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if [[ "$NEW_IP" != "$OLD_IP" ]]; then
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echo "Old IP ($OLD_IP) does not match new IP ($NEW_IP), updating..."
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${lib.getExe pkgs.curl} --silent --netrc-file "$CREDENTIALS_DIRECTORY/netrc" "https://api.domeneshop.no/v0/dyndns/update?hostname=$DNSNAME&myip=$NEW_IP"
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else
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echo "Old IP ($OLD_IP) matches new IP ($NEW_IP), exiting..."
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fi
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'';
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};
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};
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}
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