replace journald witrh loki+promtail

modules/nixos/loki/default.nix

@@ -0,0 +1,62 @@
+{
+  services.loki = {
+    enable = true;
+    configuration = {
+      auth_enabled = false;
+      server.http_listen_port = 3100;
+
+      common = {
+        ring = {
+          instance_addr = "127.0.0.1";
+          kvstore.store = "inmemory";
+        };
+        replication_factor = 1;
+        path_prefix = "/var/lib/loki";
+      };
+
+      schema_config = {
+        configs = [
+          {
+            from = "2020-10-24";
+            store = "tsdb";
+            object_store = "filesystem";
+            schema = "v13";
+            index = {
+              prefix = "index_";
+              period = "24h";
+            };
+          }
+        ];
+      };
+
+      storage_config = {
+        filesystem = {
+          directory = "/var/lib/loki/chunks";
+        };
+      };
+    };
+  };
+
+  services.grafana = {
+    enable = true;
+    settings = {
+      server = {
+        http_addr = "0.0.0.0";
+        http_port = 3003;
+      };
+    };
+
+    provision = {
+      enable = true;
+      datasources.settings.datasources = [
+        {
+          name = "Loki";
+          type = "loki";
+          access = "proxy";
+          url = "http://127.0.0.1:3100";
+          isDefault = true;
+        }
+      ];
+    };
+  };
+}