Geo - Reset the verification checksum after deployment refs are created

app/services/update_deployment_service.rb

@@ -51,3 +51,5 @@ class UpdateDeploymentService
     environment_options[:action] || 'start'
   end
 end
+
+UpdateDeploymentService.prepend(EE::UpdateDeploymentService)

ee/app/services/ee/update_deployment_service.rb

+# frozen_string_literal: true
+
+module EE
+  module UpdateDeploymentService
+    extend ::Gitlab::Utils::Override
+
+    override :execute
+    def execute
+      super.tap do |deployment|
+        deployment.project.repository.log_geo_updated_event
+      end
+    end
+  end
+end

ee/changelogs/unreleased/9227-geo-primary-checksums-are-not-recalculated-after-deployment-refs-are-created.yml

+---
+title: Geo - Reset the verification checksum after deployment refs are created
+merge_request: 10160
+author:
+type: fixed

ee/spec/services/ee/update_deployment_service_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe UpdateDeploymentService do
+  include ::EE::GeoHelpers
+
+  let(:primary) { create(:geo_node, :primary) }
+  let(:project) { create(:project, :repository) }
+  let(:repository_state) { create(:repository_state, :repository_verified, project: project) }
+  let!(:deployment) { create(:deployment, :success, project: project) }
+
+  before do
+    stub_current_geo_node(primary)
+  end
+
+  subject { described_class.new(deployment) }
+
+  describe '#execute' do
+    it 'triggers a Geo event about the new deployment ref' do
+      expect_next_instance_of(Geo::RepositoryUpdatedService) do |service|
+        expect(service).to receive(:execute)
+      end
+
+      subject.execute
+    end
+
+    it 'resets the repository verification checksum' do
+      expect { subject.execute }.to change { repository_state.reload.repository_verification_checksum }.to(nil)
+    end
+
+    it 'returns the deployment' do
+      expect(subject.execute).to eq(deployment)
+    end
+  end
+end