1 files changed, 163 insertions, 0 deletions
diff --git a/nixpkgs/nixos/modules/system/boot/systemd/journald-remote.nix b/nixpkgs/nixos/modules/system/boot/systemd/journald-remote.nix
new file mode 100644
index 000000000000..57a0a133e1c6
--- /dev/null
+++ b/nixpkgs/nixos/modules/system/boot/systemd/journald-remote.nix
@@ -0,0 +1,163 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.journald.remote;
+  format = pkgs.formats.systemd;
+
+  cliArgs = lib.cli.toGNUCommandLineShell { } {
+    inherit (cfg) output;
+    # "-3" specifies the file descriptor from the .socket unit.
+    "listen-${cfg.listen}" = "-3";
+  };
+in
+{
+  meta.maintainers = [ lib.maintainers.raitobezarius ];
+  options.services.journald.remote = {
+    enable = lib.mkEnableOption "receiving systemd journals from the network";
+
+    listen = lib.mkOption {
+      default = "https";
+      type = lib.types.enum [ "https" "http" ];
+      description = lib.mdDoc ''
+        Which protocol to listen to.
+      '';
+    };
+
+    output = lib.mkOption {
+      default = "/var/log/journal/remote/";
+      type = lib.types.str;
+      description = lib.mdDoc ''
+        The location of the output journal.
+
+        In case the output file is not specified, journal files will be created
+        underneath the selected directory. Files will be called
+        {file}`remote-hostname.journal`, where the `hostname` part is the
+        escaped hostname of the source endpoint of the connection, or the
+        numerical address if the hostname cannot be determined.
+      '';
+    };
+
+    port = lib.mkOption {
+      default = 19532;
+      type = lib.types.port;
+      description = ''
+        The port to listen to.
+
+        Note that this option is used only if
+        {option}`services.journald.upload.listen` is configured to be either
+        "https" or "http".
+      '';
+    };
+
+    settings = lib.mkOption {
+      default = { };
+
+      description = lib.mdDoc ''
+        Configuration in the journal-remote configuration file. See
+        {manpage}`journal-remote.conf(5)` for available options.
+      '';
+
+      type = lib.types.submodule {
+        freeformType = format.type;
+
+        options.Remote = {
+          Seal = lib.mkOption {
+            default = false;
+            example = true;
+            type = lib.types.bool;
+            description = ''
+              Periodically sign the data in the journal using Forward Secure
+              Sealing.
+            '';
+          };
+
+          SplitMode = lib.mkOption {
+            default = "host";
+            example = "none";
+            type = lib.types.enum [ "host" "none" ];
+            description = lib.mdDoc ''
+              With "host", a separate output file is used, based on the
+              hostname of the other endpoint of a connection. With "none", only
+              one output journal file is used.
+            '';
+          };
+
+          ServerKeyFile = lib.mkOption {
+            default = "/etc/ssl/private/journal-remote.pem";
+            type = lib.types.str;
+            description = lib.mdDoc ''
+              A path to a SSL secret key file in PEM format.
+
+              Note that due to security reasons, `systemd-journal-remote` will
+              refuse files from the world-readable `/nix/store`. This file
+              should be readable by the "" user.
+
+              This option can be used with `listen = "https"`. If the path
+              refers to an `AF_UNIX` stream socket in the file system a
+              connection is made to it and the key read from it.
+            '';
+          };
+
+          ServerCertificateFile = lib.mkOption {
+            default = "/etc/ssl/certs/journal-remote.pem";
+            type = lib.types.str;
+            description = lib.mdDoc ''
+              A path to a SSL certificate file in PEM format.
+
+              This option can be used with `listen = "https"`. If the path
+              refers to an `AF_UNIX` stream socket in the file system a
+              connection is made to it and the certificate read from it.
+            '';
+          };
+
+          TrustedCertificateFile = lib.mkOption {
+            default = "/etc/ssl/ca/trusted.pem";
+            type = lib.types.str;
+            description = lib.mdDoc ''
+              A path to a SSL CA certificate file in PEM format, or `all`.
+
+              If `all` is set, then client certificate checking will be
+              disabled.
+
+              This option can be used with `listen = "https"`. If the path
+              refers to an `AF_UNIX` stream socket in the file system a
+              connection is made to it and the certificate read from it.
+            '';
+          };
+        };
+      };
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.additionalUpstreamSystemUnits = [
+      "systemd-journal-remote.service"
+      "systemd-journal-remote.socket"
+    ];
+
+    systemd.services.systemd-journal-remote.serviceConfig.ExecStart = [
+      # Clear the default command line
+      ""
+      "${pkgs.systemd}/lib/systemd/systemd-journal-remote ${cliArgs}"
+    ];
+
+    systemd.sockets.systemd-journal-remote = {
+      wantedBy = [ "sockets.target" ];
+      listenStreams = [
+        # Clear the default port
+        ""
+        (toString cfg.port)
+      ];
+    };
+
+    # User and group used by systemd-journal-remote.service
+    users.groups.systemd-journal-remote = { };
+    users.users.systemd-journal-remote = {
+      isSystemUser = true;
+      group = "systemd-journal-remote";
+    };
+
+    environment.etc."systemd/journal-remote.conf".source =
+      format.generate "journal-remote.conf" cfg.settings;
+  };
+}