add panopticon

Signed-off-by: gwg313 <gwg313@pm.me>

hosts/panopticon/promtail.nix

@@ -0,0 +1,28 @@
+{ config, ... }:
+{
+  services.promtail = {
+    enable = true;
+    configuration = {
+      server.http_listen_port = 9080;
+      positions = {
+        filename = "/var/lib/promtail/positions.yaml";
+      };
+      clients = [
+        {
+          url = "http://localhost:3100/loki/api/v1/push";
+        }
+      ];
+      scrape_configs = [
+        {
+          job_name = "journal";
+          journal = {
+            labels = {
+              job = "systemd-journal";
+              host = config.networking.hostName;
+            };
+          };
+        }
+      ];
+    };
+  };
+}