feat(colmena/cobalt): configure soju & acme

4 files changed, 188 insertions, 0 deletions

diff --git a/colmena/cobalt/configuration.nix b/colmena/cobalt/configuration.nix
index e115859..1542def 100644
--- a/colmena/cobalt/configuration.nix
+++ b/colmena/cobalt/configuration.nix
@@ -23,6 +23,9 @@ in
   imports =
     [ # Include the results of the hardware scan.
       ./hardware-configuration.nix
+
+      ./services/acme.nix
+      ./services/soju.nix
     ];
 
   boot.supportedFilesystems = [ "zfs" ];
diff --git a/colmena/cobalt/overlays/soju.nix b/colmena/cobalt/overlays/soju.nix
new file mode 100644
index 0000000..95f333e
--- /dev/null
+++ b/colmena/cobalt/overlays/soju.nix
@@ -0,0 +1,132 @@
+# Not an overlay, module replacement
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.soju;
+  stateDir = "/var/lib/soju";
+  listenCfg = concatMapStringsSep "\n" (l: "listen ${l}") cfg.listen;
+  tlsCfg = optionalString (cfg.tlsCertificate != null)
+    "tls ${cfg.tlsCertificate} ${cfg.tlsCertificateKey}";
+  logCfg = optionalString cfg.enableMessageLogging
+    "log fs ${stateDir}/logs";
+
+  configFile = pkgs.writeText "soju.conf" ''
+    ${listenCfg}
+    hostname ${cfg.hostName}
+    ${tlsCfg}
+    db sqlite3 ${stateDir}/soju.db
+    ${logCfg}
+    http-origin ${concatStringsSep " " cfg.httpOrigins}
+    accept-proxy-ip ${concatStringsSep " " cfg.acceptProxyIP}
+
+    ${cfg.extraConfig}
+  '';
+in
+{
+  ###### interface
+
+  options.services.soju = {
+    enable = mkEnableOption (lib.mdDoc "soju");
+
+    listen = mkOption {
+      type = types.listOf types.str;
+      default = [ ":6697" ];
+      description = lib.mdDoc ''
+        Where soju should listen for incoming connections. See the
+        `listen` directive in
+        {manpage}`soju(1)`.
+      '';
+    };
+
+    hostName = mkOption {
+      type = types.str;
+      default = config.networking.hostName;
+      defaultText = literalExpression "config.networking.hostName";
+      description = lib.mdDoc "Server hostname.";
+    };
+
+    tlsCertificate = mkOption {
+      type = types.nullOr types.path;
+      default = null;
+      example = "/var/host.cert";
+      description = lib.mdDoc "Path to server TLS certificate.";
+    };
+
+    tlsCertificateKey = mkOption {
+      type = types.nullOr types.path;
+      default = null;
+      example = "/var/host.key";
+      description = lib.mdDoc "Path to server TLS certificate key.";
+    };
+
+    enableMessageLogging = mkOption {
+      type = types.bool;
+      default = true;
+      description = lib.mdDoc "Whether to enable message logging.";
+    };
+
+    httpOrigins = mkOption {
+      type = types.listOf types.str;
+      default = [];
+      description = lib.mdDoc ''
+        List of allowed HTTP origins for WebSocket listeners. The parameters are
+        interpreted as shell patterns, see
+        {manpage}`glob(7)`.
+      '';
+    };
+
+    acceptProxyIP = mkOption {
+      type = types.listOf types.str;
+      default = [];
+      description = lib.mdDoc ''
+        Allow the specified IPs to act as a proxy. Proxys have the ability to
+        overwrite the remote and local connection addresses (via the X-Forwarded-\*
+        HTTP header fields). The special name "localhost" accepts the loopback
+        addresses 127.0.0.0/8 and ::1/128. By default, all IPs are rejected.
+      '';
+    };
+
+    extraConfig = mkOption {
+      type = types.lines;
+      default = "";
+      description = lib.mdDoc "Lines added verbatim to the configuration file.";
+    };
+
+    extraGroups = mkOption {
+      type = types.listOf types.str;
+      default = [];
+      description = lib.mdDoc "Extra groups for the dynamic user.";
+    };
+  };
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+    assertions = [
+      {
+        assertion = (cfg.tlsCertificate != null) == (cfg.tlsCertificateKey != null);
+        message = ''
+          services.soju.tlsCertificate and services.soju.tlsCertificateKey
+          must both be specified to enable TLS.
+        '';
+      }
+    ];
+
+    systemd.services.soju = {
+      description = "soju IRC bouncer";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network-online.target" ];
+      serviceConfig = {
+        DynamicUser = true;
+        SupplementaryGroups = cfg.extraGroups;
+        Restart = "always";
+        ExecStart = "${pkgs.soju}/bin/soju -config ${configFile}";
+        StateDirectory = "soju";
+      };
+    };
+  };
+
+  meta.maintainers = with maintainers; [ malvo ];
+}
diff --git a/colmena/cobalt/services/acme.nix b/colmena/cobalt/services/acme.nix
new file mode 100644
index 0000000..b41ae1c
--- /dev/null
+++ b/colmena/cobalt/services/acme.nix
@@ -0,0 +1,26 @@
+let
+  poorObfuscation = y: x: "${x}@${y}";
+in
+{
+  security.acme = {
+    acceptTerms = true;
+    defaults.email = poorObfuscation "sefidel.com" "postmaster";
+    certs = {
+      "sefidel.com" = {
+        domain = "*.sefidel.com";
+        dnsProvider = "hetzner";
+        dnsPropagationCheck = true;
+        credentialsFile = "/persist/secrets/hetzner.key";
+      };
+    };
+  };
+
+  environment.persistence."/persist".directories = [
+    "/var/lib/acme"
+  ];
+
+  deployment.keys."hetzner.key" = {
+    keyCommand = [ "pass" "show" "server/hetzner-dns" ];
+    destDir = "/persist/secrets";
+  };
+}
diff --git a/colmena/cobalt/services/soju.nix b/colmena/cobalt/services/soju.nix
new file mode 100644
index 0000000..3e1e3fe
--- /dev/null
+++ b/colmena/cobalt/services/soju.nix
@@ -0,0 +1,27 @@
+{
+  services.soju = {
+    enable = true;
+    extraGroups = [ "acme" ];
+    hostName = "bouncer.sefidel.com";
+    listen = [
+      # ":6697"
+      "ircs://bouncer.sefidel.com:6697"
+    ];
+    tlsCertificate = "/var/lib/acme/sefidel.com/cert.pem";
+    tlsCertificateKey = "/var/lib/acme/sefidel.com/key.pem";
+  };
+
+  networking.firewall.allowedTCPPorts = [ 6697 ];
+
+  environment.persistence."/persist".directories = [
+    "/var/lib/private/soju"
+  ];
+
+  # TODO: remove this once merged
+  disabledModules = [ "services/networking/soju.nix" ];
+
+  imports = [
+    ./acme.nix
+    ../overlays/soju.nix
+  ];
+}