Numbus/modules/backup/services/applications/traefik.nix

{ config, pkgs, lib, ... }:

with lib;

let
  # Container config
  name = "traefik";
  # Version tagging
  traefikVersion = "v3.6.8";
  # Helper
  helper = import ../service-helper.nix { inherit config pkgs lib; };
  cfg = config.numbus-server.services.traefik;
in

helper.mkPodmanService {
  inherit name;
  description = "Traefik reverse proxy, one to rule them all";
  defaultPort = "7780";
  pod = "false";
  startDelay = 10;
  dataDirEnabled = false;
  middlewares = [
    "secureHeaders"
  ];
  dependencies = [
    "sops-install-secrets.service"
    "network-online.target"
  ];
  dirPermissions = [
    "100999:100 ${cfg.configDir}"
    "100999:100 ${cfg.configDir}/certs"
  ];

# Compose file good
  composeText = ''
    services:
      traefik:
        image: docker.io/library/traefik:${traefikVersion}
        container_name: traefik
        hostname: traefik
        user: '1000:1000'
        network_mode: pasta
        ports:
          - "${cfg.port}:8080/tcp"
          - "443:443/tcp"
        volumes:
          - ${config.sops.templates."traefik/config".path}:/etc/traefik/traefik.yaml:ro
          - ${cfg.configDir}/certs:/var/traefik/certs
          - /etc/traefik/rules:/etc/traefik/rules:ro
        environment:
          - CF_DNS_API_TOKEN=${config.sops.placeholder."traefik/cloudflare_api_token"}
        cap_add:
          - NET_BIND_SERVICE
        security_opt:
          - no-new-privileges:true
        restart: unless-stopped
  '';

  extraConfig = {
    sops.secrets."traefik/cloudflare_api_token" = {
      sopsFile = /etc/nixos/secrets/podman/traefik.yaml;
      gid = "100";
      uid = "1000";
      mode = "0400";
    };

    sops.templates."traefik/config"= { 
      gid = "100";
      uid = "100999";
      mode = "0400";
      content = ''
        global:
          checkNewVersion: false
          sendAnonymousUsage: false
        log:
          level: ${cfg.logLevel}
        accesslog: {}
        api:
          dashboard: true
          insecure: false
        entryPoints:
          web:
            address: :80
            http:
              redirections:
                entryPoint:
                  to: websecure
                  scheme: https
          websecure:
            address: :443
            forwardedHeaders:
              trustedIPs:
                - "127.0.0.1/32"
                - "10.0.0.0/8"
                - "192.168.0.0/16"
                - "172.16.0.0/12"
        certificatesResolvers:
          cloudflare:
            acme:
              email: ${config.numbus-server.mail.adminAddress}
              storage: /var/traefik/certs/cloudflare-acme.json
              caServer: "https://acme-v02.api.letsencrypt.org/directory"
              dnsChallenge:
                provider: cloudflare
                resolvers:
                  - "1.1.1.1:53"
                  - "9.9.9.9:53"
        serversTransport:
          insecureSkipVerify: true
        providers:
          file:
            directory: "/etc/traefik/rules"
            watch: true
      '';
      path = "/etc/traefik/traefik.yaml";
    };

    sops.templates."traefik/rules/secureHeaders" = {
      gid = "100";
      uid = "100999";
      mode = "0400";
      content = ''
        http:
          middlewares:
            secureHeaders:
              headers:
                FrameDeny: true
                AccessControlAllowMethods: 'GET,OPTIONS,PUT'
                AccessControlAllowOriginList:
                  - origin-list-or-null
                AccessControlMaxAge: 100
                AddVaryHeader: true
                BrowserXssFilter: true
                ContentTypeNosniff: true
                ForceSTSHeader: true
                STSIncludeSubdomains: true
                STSPreload: true
                ContentSecurityPolicy: default-src 'self' 'unsafe-inline'
                CustomFrameOptionsValue: SAMEORIGIN
                ReferrerPolicy: same-origin
                PermissionsPolicy: vibrate 'self'
                STSSeconds: 315360000
      '';
      path = "/etc/traefik/rules/secureHeaders.yaml";
    };

    sops.templates."traefik/rules/secureTLS" = {
      gid = "100";
      uid = "100999";
      mode = "0400";
      content = ''
        tls:
          options:
            secureTLS:
              minVersion: VersionTLS12
              sniStrict: true
              curvePreferences:
                - CurveP521
                - CurveP384
              cipherSuites:
                - TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
                - TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
                - TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
      '';
      path = "/etc/traefik/rules/secureTLS.yaml";
    };
  };

  extraOptions = {
    enable.default = true;
    logLevel = mkOption {
      type = types.enum [ "TRACE" "DEBUG" "INFO" "WARN" "ERROR" "FATAL" ];
      default = "ERROR";
      example = "ERROR";
      description = "The level of detail Traefik should print in the logs.";
    };
  };
}