1 files changed, 13 insertions, 1 deletions
diff --git a/lib/gitlab/prometheus/query_variables.rb b/lib/gitlab/prometheus/query_variables.rb
index 4d48c4a3af7..5b688f83545 100644
--- a/lib/gitlab/prometheus/query_variables.rb
+++ b/lib/gitlab/prometheus/query_variables.rb
@@ -3,8 +3,10 @@
 module Gitlab
   module Prometheus
     module QueryVariables
-      def self.call(environment)
+      # start_time and end_time should be Time objects.
+      def self.call(environment, start_time: nil, end_time: nil)
         {
+          __range: range(start_time, end_time),
           ci_environment_slug: environment.slug,
           kube_namespace: environment.deployment_namespace || '',
           environment_filter: %{container_name!="POD",environment="#{environment.slug}"},
@@ -14,6 +16,16 @@ module Gitlab
           ci_environment_name: environment.name
         }
       end
+
+      private
+
+      def self.range(start_time, end_time)
+        if start_time && end_time
+          range_seconds = (end_time - start_time).to_i
+          "#{range_seconds}s"
+        end
+      end
+      private_class_method :range
     end
   end
 end