nixos/server/configuration.nix

{ config, lib, pkgs, ... }:
{
  imports = [ ../common.nix ./hardware-configuration.nix ];
  boot.kernelParams = [ "memmap=0x4000%0xbfb76000-4" "memmap=0x4000%0xbfb7a000-4" ];
  users = {
    groups.vmail.gid = 1819;
    users = {
      nginx.extraGroups = [ "acme" ];
      root.openssh.authorizedKeys.keys = [ "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIB+wc+3rahpNa+OMS9gaWgMQIxXIKHy4Beku5LBDt+Ow" ];
      vmail = {
        uid = 1819;
        group = "vmail";
        isSystemUser = true;
      };
    };
  };
  networking = {
    hostName = "nixos-server";
    firewall = {
      allowedTCPPorts = [ 25 443 587 993 ];
      allowedUDPPorts = [ 443 ];
    };
    networkmanager.ensureProfiles.profiles.home-wifi = {
      wifi.ssid = "bogale_2.4";
      wifi-security.psk = "$BOGALE_2_4_PSK";
      ipv4 = {
        method = "manual";
        gateway = "10.1.0.1";
        addresses = "10.1.0.2/16";
      };
      ipv6 = {
        method = "manual";
        gateway = "fc01::1";
        addresses = "fc01::2/64";
      };
    };
  };
  security.acme = {
    acceptTerms = true;
    defaults.email = "letsencrypt@bogaledev.ru";
    certs."bogaledev.ru" = {
      validMinDays = 3;
      dnsProvider = "cloudflare";
      extraDomainNames = [ "*.bogaledev.ru" ];
      credentialFiles = { "CF_DNS_API_TOKEN_FILE" = "/secrets/cf-token"; };
      reloadServices = [ "nginx.service" "dovecot.service" "postfix.service" ];
    };
  };
  systemd = {
    tmpfiles.rules = [
      "d /var/spool/postfix 0755 postfix postfix -"
      "d /var/spool/postfix/private 0755 postfix postfix -"
    ];
    timers.network-watchdog = {
      wantedBy = [ "timers.target" ];
      timerConfig = {
        OnBootSec = 5;
        AccuracySec = 1;
        OnUnitActiveSec = 5;
        Unit = "network-watchdog.service";
      };
    };
    services.network-watchdog = {
      path = [ pkgs.iputils ];
      serviceConfig = {
        Type = "oneshot";
        LogLevelMax = "notice";
      };
      script = ''
        if [ ! -e /run/network.failures ] || ping -c 1 -W 3 1.1.1.1 &> /dev/null; then
          failures=0
        else
          failures=$(($(cat /run/network.failures)+1))
          if [ $failures -ge 3 ]; then
            systemctl restart NetworkManager.service
            failures=0
          fi
        fi
        echo $failures > /run/network.failures
        if [ $failures -ge 0 ]; then
          echo "<5>failures = $failures"
        fi
      '';
    };
  };
  services = let
    saslSocket = "/var/spool/postfix/private/auth";
    sslCertDir = config.security.acme.certs."bogaledev.ru".directory;
  in {
    openssh = {
      enable = true;
      settings.PasswordAuthentication = false;
    };
    postgresql.enable = true;
    phpfpm.pools.main = {
      user = "nginx";
      group = "nginx";
      settings = {
        "pm" = "ondemand";
        "pm.max_children" = 8;
        "listen.owner" = "nginx";
        "listen.group" = "nginx";
      };
    };
    vaultwarden = {
      enable = true;
      dbBackend = "postgresql";
      configurePostgres = true;
      package = pkgs.vaultwarden-postgresql;
      environmentFile = "/secrets/vaultwarden.env";
      config = {
        SIGNUPS_ALLOWED = false;
        TRASH_AUTO_DELETE_DAYS = 90;
        PASSWORD_HINTS_ALLOWED = false;
        EMERGENCY_ACCESS_ALLOWED = false;
        DOMAIN = "https://bogaledev.ru/vw";
      };
    };
    nginx.virtualHosts."bogaledev.ru" = {
      quic = true;
      default = true;
      forceSSL = true;
      root = "/srv/http";
      useACMEHost = "bogaledev.ru";
      extraConfig = ''add_header Alt-Svc 'h3=":443"; ma=86400' always;'';
      locations = {
        "/".index = "index.php index.html";
        "~ \\.php$".extraConfig = ''
          fastcgi_pass unix:${config.services.phpfpm.pools.main.socket};
        '';
        "/vw" = {
          proxyPass = "http://127.0.0.1:8000";
          proxyWebsockets = true;
          extraConfig = ''
            allow fc00::/64;
            allow fc01::/64;
            allow 10.0.0.0/24;
            allow 10.1.0.0/24;
            deny all;
          '';
        };
      };
    };
    rspamd = {
      enable = true;
      postfix.enable = true;
    };
    dovecot2 = {
      enable = true;
      settings = {
        ssl = "required";
        mail_gid = "vmail";
        mail_uid = "vmail";
        protocols.imap = true;
        mail_driver = "maildir";
        auth_mechanisms = [ "plain" ];
        dovecot_storage_version = "2.4.5";
        mail_path = "/var/spool/mail/vmail";
        ssl_server_key_file = "${sslCertDir}/key.pem";
        ssl_server_cert_file = "${sslCertDir}/fullchain.pem";
        dovecot_config_version = config.services.dovecot2.package.version;
        "passdb passwd-file".passwd_file_path = "/secrets/dovecot-passwd";
        "service auth"."unix_listener ${saslSocket}" = {
          mode = "0660";
          user = "postfix";
          group = "postfix";
        };
      };
    };
    postfix = {
      enable = true;
      enableSubmission = true;
      virtualMapType = "regexp";
      virtual = "/.*@bogaledev.ru/ mail@bogaledev.ru";
      mapFiles = {
        smtp_passwd = "/secrets/smtp_passwd";
        mailbox = pkgs.writeText "mailbox" "mail@bogaledev.ru /";
      };
      settings.main = {
        smtpd_sasl_type = "dovecot";
        smtpd_sasl_path = saslSocket;
        smtp_sasl_auth_enable = "yes";
        smtpd_sasl_auth_enable = "yes";
        virtual_uid_maps = "static:1819";
        virtual_gid_maps = "static:1819";
        smtp_tls_security_level = "encrypt";
        smtpd_tls_security_level = "encrypt";
        relayhost = [ "smtp.resend.com:2587" ];
        virtual_mailbox_domains = "bogaledev.ru";
        virtual_mailbox_base = "/var/spool/mail/vmail";
        smtp_sasl_tls_security_options = "noanonymous";
        virtual_mailbox_maps = "hash:/etc/postfix/mailbox";
        smtp_sasl_password_maps = "hash:/etc/postfix/smtp_passwd";
        smtpd_tls_chain_files = [
          "${sslCertDir}/key.pem"
          "${sslCertDir}/fullchain.pem"
        ];
      };
    };
  };
}