diff --git a/modules/services/grafana/default.nix b/modules/services/grafana/default.nix
index 488d0fa..3f5ffd8 100644
--- a/modules/services/grafana/default.nix
+++ b/modules/services/grafana/default.nix
@@ -28,6 +28,28 @@ in {
         http_port = 2342;
         http_addr = "0.0.0.0";
       };
+
+      provision = {
+        enable = true;
+        datasources = {
+          # This assumes prometheus, loki, and grafana are all running on the
+          # same host.
+          settings.datasources = [
+            {
+              name = "Prometheus";
+              type = "prometheus";
+              access = "proxy";
+              url = "http://127.0.0.1:${toString config.services.prometheus.port}";
+            }
+            {
+              name = "Loki";
+              type = "loki";
+              access = "proxy";
+              url = "http://127.0.0.1:${toString config.services.loki.configuration.server.http_listen_port}";
+            }
+          ];
+        };
+      };
     };
 
     services.nginx = {