Disable the file download scheduler when tracking DB is not available

app/workers/geo_file_download_dispatch_worker.rb

@@ -22,6 +22,7 @@ class GeoFileDownloadDispatchWorker
   #    files, excluding ones in progress.
   # 5. Quit when we have scheduled all downloads or exceeded an hour.
   def perform
+    return unless Gitlab::Geo.configured?
     return unless Gitlab::Geo.secondary?
 
     @start_time = Time.now

spec/workers/geo_file_download_dispatch_worker_spec.rb

@@ -13,6 +13,16 @@ describe GeoFileDownloadDispatchWorker do
   subject { described_class.new }
 
   describe '#perform' do
+    it 'does not schedule anything when tracking DB is not available' do
+      create(:lfs_object, :with_file)
+
+      allow(Rails.configuration).to receive(:respond_to?).with(:geo_database) { false }
+
+      expect(GeoFileDownloadWorker).not_to receive(:perform_async)
+
+      subject.perform
+    end
+
     it 'does not schedule anything when node is disabled' do
       create(:lfs_object, :with_file)