Remove cache_vulnerability_history feature flag

The `gitlab-org` and `gitlab-com` groups have been using the cache for
the vulnerability history endpoint consumed by the group security
dashboard for over 3 months and things have been going well. Time to
take off the training wheels.

ee/app/services/security/store_reports_service.rb

@@ -27,9 +27,9 @@ module Security
     # Silently swallow errors if there are any problems caching vulnerabilities
     def cache_vulnerabilities
       project = @pipeline.project
-      if Feature.enabled?(:cache_vulnerability_history, project.group)
-        Gitlab::Vulnerabilities::HistoryCache.new(project.group, project.id).fetch(Gitlab::Vulnerabilities::History::HISTORY_RANGE, force: true)
-      end
+
+      Gitlab::Vulnerabilities::HistoryCache.new(project.group, project.id)
+        .fetch(Gitlab::Vulnerabilities::History::HISTORY_RANGE, force: true)
     rescue => err
       error("Failed to cache vulnerabilities for pipeline #{@pipeline.id}: #{err}")
     end

ee/changelogs/unreleased/33899-remove-history-cache-ff.yml

+---
+title: Cache vulnerability findings history endpoint for security dashboards
+merge_request: 21349
+author:
+type: added

ee/lib/gitlab/vulnerabilities/history.rb

@@ -15,7 +15,7 @@ module Gitlab
       end
 
       def findings_counter
-        return cached_vulnerability_history if use_vulnerability_cache?
+        return cached_vulnerability_history unless dynamic_filters_included?
 
         findings = vulnerability_findings.count_by_day_and_severity(HISTORY_RANGE)
         ::Vulnerabilities::HistorySerializer.new.represent(findings)
@@ -48,10 +48,6 @@ module Gitlab
         history
       end
 
-      def use_vulnerability_cache?
-        Feature.enabled?(:cache_vulnerability_history, group) && !dynamic_filters_included?
-      end
-
       def dynamic_filters_included?
         dynamic_filters = [:report_type, :confidence, :severity]
         filters.keys.any? { |key| dynamic_filters.include?(key.to_sym) }

ee/spec/lib/gitlab/vulnerabilities/history_spec.rb

@@ -16,67 +16,42 @@ describe Gitlab::Vulnerabilities::History do
   describe '#findings_counter', :use_clean_rails_memory_store_caching do
     subject(:counter) { described_class.new(group, filters).findings_counter }
 
-    context 'feature disabled' do
-      before do
-        stub_feature_flags(cache_vulnerability_history: false)
-      end
+    context 'filters are passed' do
+      let(:filters) { { report_type: :sast } }
 
       it 'does not call Gitlab::Vulnerabilities::HistoryCache' do
         expect(Gitlab::Vulnerabilities::HistoryCache).not_to receive(:new)
 
         counter
       end
-
-      it 'returns the proper format for the history' do
-        Timecop.freeze do
-          expect(counter[:total]).to eq({ Date.today => 3 })
-          expect(counter[:high]).to eq({ Date.today => 2 })
-        end
-      end
     end
 
-    context 'feature enabled' do
-      before do
-        stub_feature_flags(cache_vulnerability_history: true)
-      end
-
-      context 'filters are passed' do
-        let(:filters) { { report_type: :sast } }
-
-        it 'does not call Gitlab::Vulnerabilities::HistoryCache' do
-          expect(Gitlab::Vulnerabilities::HistoryCache).not_to receive(:new)
-
-          counter
-        end
-      end
+    it 'calls Gitlab::Vulnerabilities::HistoryCache' do
+      expect(Gitlab::Vulnerabilities::HistoryCache).to receive(:new).twice.and_call_original
 
-      it 'calls Gitlab::Vulnerabilities::HistoryCache' do
-        expect(Gitlab::Vulnerabilities::HistoryCache).to receive(:new).twice.and_call_original
+      counter
+    end
 
-        counter
+    it 'returns the proper format for the history' do
+      Timecop.freeze do
+        expect(counter[:total]).to eq({ Date.today => 3 })
+        expect(counter[:high]).to eq({ Date.today => 2 })
       end
+    end
 
-      it 'returns the proper format for the history' do
-        Timecop.freeze do
-          expect(counter[:total]).to eq({ Date.today => 3 })
-          expect(counter[:high]).to eq({ Date.today => 2 })
+    context 'multiple projects with vulnerabilities' do
+      before do
+        Timecop.freeze(Date.today - 1) do
+          create_vulnerabilities(1, project1, { severity: :high })
         end
-      end
-
-      context 'multiple projects with vulnerabilities' do
-        before do
-          Timecop.freeze(Date.today - 1) do
-            create_vulnerabilities(1, project1, { severity: :high })
-          end
-          Timecop.freeze(Date.today - 4) do
-            create_vulnerabilities(1, project2, { severity: :high })
-          end
+        Timecop.freeze(Date.today - 4) do
+          create_vulnerabilities(1, project2, { severity: :high })
         end
+      end
 
-        it 'sorts by date for each key' do
-          Timecop.freeze do
-            expect(counter[:high].keys).to eq([(Date.today - 4), (Date.today - 1), Date.today])
-          end
+      it 'sorts by date for each key' do
+        Timecop.freeze do
+          expect(counter[:high].keys).to eq([(Date.today - 4), (Date.today - 1), Date.today])
         end
       end
     end

ee/spec/services/security/store_reports_service_spec.rb

@@ -62,28 +62,10 @@ describe Security::StoreReportsService do
         expect { subject }.not_to raise_error
       end
 
-      context 'feature disabled' do
-        before do
-          stub_feature_flags(cache_vulnerability_history: false)
-        end
-
-        it 'does not cache vulnerability history' do
-          expect_any_instance_of(Gitlab::Vulnerabilities::HistoryCache).not_to receive(:fetch)
-
-          subject
-        end
-      end
+      it 'caches vulnerability history' do
+        expect_any_instance_of(Gitlab::Vulnerabilities::HistoryCache).to receive(:fetch)
 
-      context 'feature enabled' do
-        before do
-          stub_feature_flags(cache_vulnerability_history: true)
-        end
-
-        it 'caches vulnerability history' do
-          expect_any_instance_of(Gitlab::Vulnerabilities::HistoryCache).to receive(:fetch)
-
-          subject
-        end
+        subject
       end
     end
   end