1 files changed, 28 insertions, 0 deletions
diff --git a/lib/gitlab/usage/metrics/instrumentations/prometheus_metric.rb b/lib/gitlab/usage/metrics/instrumentations/prometheus_metric.rb
new file mode 100644
index 00000000000..ab1298b63c3
--- /dev/null
+++ b/lib/gitlab/usage/metrics/instrumentations/prometheus_metric.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Usage
+    module Metrics
+      module Instrumentations
+        class PrometheusMetric < GenericMetric
+          # Usage example
+          #
+          # class GitalyApdexMetric < PrometheusMetric
+          #   value do
+          #     result = client.query('avg_over_time(gitlab_usage_ping:gitaly_apdex:ratio_avg_over_time_5m[1w])').first
+          #
+          #     break FALLBACK unless result
+          #
+          #     result['value'].last.to_f
+          #   end
+          # end
+          def value
+            with_prometheus_client(verify: false, fallback: FALLBACK) do |client|
+              super(client)
+            end
+          end
+        end
+      end
+    end
+  end
+end