1 files changed, 24 insertions, 0 deletions
diff --git a/app/controllers/projects/prometheus_controller.rb b/app/controllers/projects/prometheus_controller.rb
new file mode 100644
index 00000000000..507468d7102
--- /dev/null
+++ b/app/controllers/projects/prometheus_controller.rb
@@ -0,0 +1,24 @@
+class Projects::PrometheusController < Projects::ApplicationController
+  before_action :authorize_read_project!
+  before_action :require_prometheus_metrics!
+
+  def active_metrics
+    respond_to do |format|
+      format.json do
+        matched_metrics = project.prometheus_service.matched_metrics || {}
+
+        if matched_metrics.any?
+          render json: matched_metrics
+        else
+          head :no_content
+        end
+      end
+    end
+  end
+
+  private
+
+  def require_prometheus_metrics!
+    render_404 unless project.prometheus_service.present?
+  end
+end