journalbeat service: init at 5.1.2

Journalbeat is a log shipper from systemd/journald to
Logstash/Elasticsearch. I added a package as well as a NixOS service
module for it.

1 files changed, 76 insertions, 0 deletions

diff --git a/nixos/modules/services/logging/journalbeat.nix b/nixos/modules/services/logging/journalbeat.nix
new file mode 100644
index 000000000000..8186a3b02c37
--- /dev/null
+++ b/nixos/modules/services/logging/journalbeat.nix
@@ -0,0 +1,76 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.journalbeat;
+
+  journalbeatYml = pkgs.writeText "journalbeat.yml" ''
+    name: ${cfg.name}
+    tags: ${builtins.toJSON cfg.tags}
+
+    journalbeat.cursor_state_file: ${cfg.stateDir}/cursor-state
+
+    ${cfg.extraConfig}
+  '';
+
+in
+{
+  options = {
+
+    services.journalbeat = {
+
+      enable = mkEnableOption "journalbeat";
+
+      name = mkOption {
+        type = types.str;
+        default = "journalbeat";
+        description = "Name of the beat";
+      };
+
+      tags = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        description = "Tags to place on the shipped log messages";
+      };
+
+      stateDir = mkOption {
+        type = types.str;
+        default = "/var/lib/journalbeat";
+        description = "The state directory. Journalbeat's own logs and other data are stored here.";
+      };
+
+      extraConfig = mkOption {
+        type = types.lines;
+        default = ''
+          journalbeat:
+            seek_position: cursor
+            cursor_seek_fallback: tail
+            write_cursor_state: true
+            cursor_flush_period: 5s
+            clean_field_names: true
+            convert_to_numbers: false
+            move_metadata_to_field: journal
+            default_type: journal
+        '';
+        description = "Any other configuration options you want to add";
+      };
+
+    };
+  };
+
+  config = mkIf cfg.enable {
+
+    systemd.services.journalbeat = with pkgs; {
+      description = "Journalbeat log shipper";
+      wantedBy = [ "multi-user.target" ];
+      preStart = ''
+        mkdir -p ${cfg.stateDir}/data
+        mkdir -p ${cfg.stateDir}/logs
+      '';
+      serviceConfig = {
+        ExecStart = "${pkgs.journalbeat}/bin/journalbeat -c ${journalbeatYml} -path.data ${cfg.stateDir}/data -path.logs ${cfg.stateDir}/logs";
+      };
+    };
+  };
+}