Schedule update for prometheus after alert creation

app/services/prometheus/create_default_alerts_service.rb

@@ -33,6 +33,7 @@ module Prometheus
       return ServiceResponse.error(message: 'Invalid environment') unless environment
 
       create_alerts
+      schedule_prometheus_update
 
       ServiceResponse.success
     end
@@ -51,6 +52,13 @@ module Prometheus
       end
     end
 
+    def schedule_prometheus_update
+      project.all_clusters.with_application_prometheus.each do |cluster|
+        application = cluster.application_prometheus
+        ::Clusters::Applications::ScheduleUpdateService.new(application, project).execute
+      end
+    end
+
     def metrics_by_identifier
       strong_memoize(:metrics_by_identifier) do
         metric_identifiers = DEFAULT_ALERTS.map { |alert| alert[:identifier] }

spec/factories/clusters/clusters.rb

@@ -86,6 +86,10 @@ FactoryBot.define do
       application_helm factory: %i(clusters_applications_helm installed)
     end
 
+    trait :with_installed_prometheus do
+      application_prometheus factory: %i(clusters_applications_prometheus installed)
+    end
+
     trait :with_all_applications do
       application_helm factory: %i(clusters_applications_helm installed)
       application_ingress factory: %i(clusters_applications_ingress installed)

spec/services/prometheus/create_default_alerts_service_spec.rb

@@ -45,6 +45,27 @@ describe Prometheus::CreateDefaultAlertsService do
            .by(expected_alerts.size)
         end
 
+        it 'does not schedule an update to prometheus' do
+          expect(::Clusters::Applications::ScheduleUpdateService).not_to receive(:new)
+          execute
+        end
+
+        context 'cluster with prometheus exists' do
+          let!(:cluster) do
+            cluster = create(:cluster, :with_installed_prometheus)
+            cluster.projects << project
+            cluster
+          end
+
+          it 'schedules an update to prometheus' do
+            expect_next_instance_of(::Clusters::Applications::ScheduleUpdateService) do |instance|
+              expect(instance).to receive(:execute)
+            end
+
+            execute
+          end
+        end
+
         context 'multiple environments' do
           let!(:production) { create(:environment, project: project, name: 'production') }