replace journald witrh loki+promtail

modules/nixos/promtail/default.nix

@@ -0,0 +1,43 @@
+{ config, constants, ... }:
+
+{
+  services.promtail = {
+    enable = true;
+    configuration = {
+      server = {
+        http_listen_port = 9080;
+        grpc_listen_port = 0;
+      };
+
+      clients = [
+        {
+          url = "http://${constants.hosts.sid.ip}:3100/loki/api/v1/push";
+        }
+      ];
+
+      scrape_configs = [
+        {
+          job_name = "journal";
+          journal = {
+            max_age = "12h";
+            path = "/var/log/journal";
+
+            labels = {
+              job = "systemd-journal";
+              host = config.networking.hostName;
+            };
+          };
+
+          relabel_configs = [
+            {
+              source_labels = [ "__journal__systemd_unit" ];
+              target_label = "unit";
+            }
+          ];
+        }
+      ];
+    };
+  };
+
+  users.users.promtail.extraGroups = [ "systemd-journal" ];
+}