Add ExclusiveLease to ClearShareRunnerMinutesWorker

app/views/shared/_shared_runners_minutes_limit.html.haml

@@ -6,7 +6,7 @@
     can?(current_user, :create_pipeline, project)
   .shared-runner-quota-message.alert.alert-warning.hidden-xs
     = namespace.name
-    has exceeded their build minutes quota. Pipelines will not run anymore on shared runners.
+    has exceeded its build minutes quota. Pipelines will not run anymore on shared runners.
 
     .pull-right
       = link_to "Don't show again this month", '#', class: 'hide-shared-runner-limit-message-one-month alert-link'

app/workers/clear_shared_runner_minutes_worker.rb

 class ClearSharedRunnerMinutesWorker
+  LEASE_TIMEOUT = 3600
+
   include Sidekiq::Worker
   include CronjobQueue
 
   def perform
+    return unless try_obtain_lease
+
     ProjectMetrics.update_all(
       shared_runners_minutes: 0,
       shared_runners_minutes_last_reset: Time.now)
@@ -11,4 +15,11 @@ class ClearSharedRunnerMinutesWorker
       shared_runners_minutes: 0,
       shared_runners_minutes_last_reset: Time.now)
   end
+
+  private
+
+  def try_obtain_lease
+    Gitlab::ExclusiveLease.new('gitlab_clear_shared_runner_minutes_worker',
+      timeout: LEASE_TIMEOUT).try_obtain
+  end
 end

lib/api/entities.rb

@@ -113,7 +113,6 @@ module API
       expose :request_access_enabled
       expose :only_allow_merge_if_all_discussions_are_resolved
       expose :approvals_before_merge
-      expose :shared_runners_minutes_limit
     end
 
     class Member < UserBasic