Skip configure rake task if container registry is misconfigured

lib/tasks/gitlab/container_registry.rake

@@ -2,10 +2,15 @@ namespace :gitlab do
   namespace :container_registry do
     desc "GitLab | Container Registry | Configure"
     task configure: :gitlab_environment do
+      configure
+    end
+
+    def configure
       registry_config = Gitlab.config.registry
 
       unless registry_config.enabled && registry_config.api_url.presence
-        raise 'Registry is not enabled or registry api url is not present.'
+        puts "Registry is not enabled or registry api url is not present.".color(:yellow)
+        return
       end
 
       warn_user_is_not_gitlab

spec/tasks/gitlab/container_registry_rake_spec.rb

@@ -16,10 +16,21 @@ describe 'gitlab:container_registry namespace rake tasks' do
       stub_container_registry_config(enabled: true, api_url: api_url)
     end
 
+    subject { run_rake_task('gitlab:container_registry:configure') }
+
     shared_examples 'invalid config' do
       it 'does not update the application settings' do
-        expect { run_rake_task('gitlab:container_registry:configure') }
-          .to raise_error(/Registry is not enabled or registry api url is not present./)
+        expect(application_settings).not_to receive(:update!)
+
+        subject
+      end
+
+      it 'does not raise an error' do
+        expect { subject }.not_to raise_error
+      end
+
+      it 'prints a warning message' do
+        expect { subject }.to output(/Registry is not enabled or registry api url is not present./).to_stdout
       end
     end