Add old usage_ping routes for backwards compatibility

config/routes/project.rb

@@ -547,6 +547,12 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
         end
       end
 
+      # TODO: Deprecated. This should be removed in 14.2.
+      scope :usage_ping, controller: :service_ping do
+        post :web_ide_clientside_preview # rubocop:todo Cop/PutProjectRoutesUnderScope
+        post :web_ide_pipelines_count # rubocop:todo Cop/PutProjectRoutesUnderScope
+      end
+
       scope :service_ping, controller: :service_ping do
         post :web_ide_clientside_preview # rubocop:todo Cop/PutProjectRoutesUnderScope
         post :web_ide_pipelines_count # rubocop:todo Cop/PutProjectRoutesUnderScope

spec/routing/project_routing_spec.rb

@@ -771,6 +771,16 @@ RSpec.describe 'project routing' do
   end
 
   describe Projects::ServicePingController, 'routing' do
+    describe 'deprecated routing' do
+      it 'routes to service_ping#web_ide_clientside_preview' do
+        expect(post('/gitlab/gitlabhq/usage_ping/web_ide_clientside_preview')).to route_to('projects/service_ping#web_ide_clientside_preview', namespace_id: 'gitlab', project_id: 'gitlabhq')
+      end
+
+      it 'routes to service_ping#web_ide_pipelines_count' do
+        expect(post('/gitlab/gitlabhq/usage_ping/web_ide_pipelines_count')).to route_to('projects/service_ping#web_ide_pipelines_count', namespace_id: 'gitlab', project_id: 'gitlabhq')
+      end
+    end
+
     it 'routes to service_ping#web_ide_clientside_preview' do
       expect(post('/gitlab/gitlabhq/service_ping/web_ide_clientside_preview')).to route_to('projects/service_ping#web_ide_clientside_preview', namespace_id: 'gitlab', project_id: 'gitlabhq')
     end