nix/container/Proxy.nix

# NOTE: To generate self-signed certs use: `openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout ./privkey.pem -out ./fullchain.pem`
# For dhparams: `openssl dhparam -out ./ssl-dhparam.pem 4096`
# Example for options-ssl-nginx.conf:
# ```
# ssl_session_cache shared:le_nginx_SSL:10m;
# ssl_session_timeout 1440m;
# ssl_protocols TLSv1.2 TLSv1.3;
# ssl_prefer_server_ciphers off;
# ssl_ciphers "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384";
# ```
# For certbot to generate new keys: `certbot certonly --manual --manual-public-ip-logging-ok --preferred-challenges dns-01 --server https://acme-v02.api.letsencrypt.org/directory -d "*.voronind.com" -d voronind.com`
{
	config,
	container,
	lib,
	pkgs,
	util,
	...
} @args: let
	cfg = config.container.module.proxy;
	virtualHosts = util.catSet (util.ls ./proxy/host) args;
in {
	options.container.module.proxy = {
		enable = lib.mkEnableOption "the proxy server.";
		address = lib.mkOption {
			default = "10.1.0.2";
			type    = lib.types.str;
		};
		port = lib.mkOption {
			default = 443;
			type    = lib.types.int;
		};
		storage = lib.mkOption {
			default = "${config.container.storage}/proxy";
			type    = lib.types.str;
		};
	};

	config = lib.mkIf cfg.enable {
		systemd.tmpfiles.rules = container.mkContainerDir cfg [
			"challenge"
			"letsencrypt"
		];

		containers.proxy = container.mkContainer cfg {
			bindMounts = {
				"/etc/letsencrypt" = {
					hostPath   = "${cfg.storage}/letsencrypt";
					isReadOnly = false;
				};
				"/var/www/.well-known" = {
					hostPath   = "${cfg.storage}/challenge";
					isReadOnly = false;
				};
			};

			config = { ... }: container.mkContainerConfig cfg {
				environment.systemPackages = with pkgs; [
					certbot
				];

				services.nginx = {
					inherit virtualHosts;
					enable = true;
					clientMaxBodySize        = "4096m";
					recommendedOptimisation  = true;
					recommendedProxySettings = true;
					appendConfig = util.trimTabs ''
						worker_processes 4;
					'';
					eventsConfig = util.trimTabs ''
						worker_connections 4096;
					'';
					appendHttpConfig = util.trimTabs ''
						proxy_max_temp_file_size 0;
						proxy_buffering off;

						server {
							listen 443 ssl default_server;
							server_name _;

							ssl_certificate /etc/letsencrypt/live/${config.container.domain}/fullchain.pem;
							ssl_certificate_key /etc/letsencrypt/live/${config.container.domain}/privkey.pem;
							include /etc/letsencrypt/conf/options-ssl-nginx.conf;
							ssl_dhparam /etc/letsencrypt/conf/ssl-dhparams.pem;

							return 403;
						}
					'';
				};
			};
		};
	};
}