Deprecate Setttings > Integrations > Prometheus

Prometheus is moved from Settings > Integrations to
Settings > Operations. In old location there should be deprecation
warrings added, and update action should be disabled for
PrometheusService objects.

app/controllers/projects/services_controller.rb

@@ -8,6 +8,8 @@ class Projects::ServicesController < Projects::ApplicationController
   before_action :ensure_service_enabled
   before_action :service
   before_action :web_hook_logs, only: [:edit, :update]
+  before_action :set_deprecation_notice_for_prometheus_service, only: [:edit, :update]
+  before_action :redirect_deprecated_prometheus_service, only: [:update]
 
   respond_to :html
 
@@ -93,4 +95,16 @@ class Projects::ServicesController < Projects::ApplicationController
       .as_json(only: @service.json_fields)
       .merge(errors: @service.errors.as_json)
   end
+
+  def redirect_deprecated_prometheus_service
+    redirect_to edit_project_service_path(project, @service) if @service.is_a?(::PrometheusService) && Feature.enabled?(:settings_operations_prometheus_service, project)
+  end
+
+  def set_deprecation_notice_for_prometheus_service
+    return if !@service.is_a?(::PrometheusService) || !Feature.enabled?(:settings_operations_prometheus_service, project)
+
+    operations_link_start = "<a href=\"#{project_settings_operations_path(project)}\">"
+    message = s_('PrometheusService|You can now manage your Prometheus settings on the %{operations_link_start}Operations%{operations_link_end} page. Fields on this page has been deprecated.') % { operations_link_start: operations_link_start, operations_link_end: "</a>" }
+    flash.now[:alert] = message.html_safe
+  end
 end

ee/spec/features/projects/services/prometheus_custom_metrics_spec.rb

@@ -25,17 +25,11 @@ describe 'Prometheus custom metrics', :js do
 
     stub_request(:get, prometheus_query_with_time_url('avg(metric)', Time.now.utc))
 
-    fill_in_prometheus_integration
+    create(:prometheus_service, project: project, api_url: 'http://prometheus.example.com', manual_configuration: '1', active: true)
 
     click_link('Prometheus')
   end
 
-  def fill_in_prometheus_integration
-    check('Active')
-    fill_in('API URL', with: 'https://prometheus.example.com')
-    click_button('Save changes')
-  end
-
   it 'Deletes a custom metric' do
     wait_for_requests
 

ee/spec/features/projects/services/prometheus_external_alerts_spec.rb

@@ -20,15 +20,11 @@ describe 'Prometheus external alerts', :js do
 
   context 'with manual configuration' do
     before do
-      check('Active')
-      fill_in('API URL', with: 'http://prometheus.example.com')
-      click_button('Save changes')
-
-      visit_edit_service
+      create(:prometheus_service, project: project, api_url: 'http://prometheus.example.com', manual_configuration: '1', active: true)
     end
 
     it 'shows the Alerts section' do
-      wait_for_requests
+      visit_edit_service
 
       expect(alerts_section).to have_content('Alerts')
       expect(alerts_section).to have_content('Receive alerts from manually configured Prometheus servers.')

locale/gitlab.pot

@@ -15235,6 +15235,9 @@ msgstr ""
 msgid "PrometheusService|Waiting for your first deployment to an environment to find common metrics"
 msgstr ""
 
+msgid "PrometheusService|You can now manage your Prometheus settings on the %{operations_link_start}Operations%{operations_link_end} page. Fields on this page has been deprecated."
+msgstr ""
+
 msgid "Promote"
 msgstr ""
 

spec/controllers/projects/services_controller_spec.rb

@@ -191,11 +191,48 @@ describe Projects::ServicesController do
         end
       end
     end
+
+    context 'Prometheus service' do
+      let!(:service) { create(:prometheus_service, project: project) }
+      let(:service_params) { { manual_configuration: '1', api_url: 'http://example.com' } }
+
+      context 'feature flag :settings_operations_prometheus_service is enabled' do
+        before do
+          stub_feature_flags(settings_operations_prometheus_service: true)
+        end
+
+        it 'redirects user back to edit page with alert' do
+          put :update, params: project_params.merge(service: service_params)
+
+          expect(response).to redirect_to(edit_project_service_path(project, service))
+          expected_alert = "You can now manage your Prometheus settings on the <a href=\"#{project_settings_operations_path(project)}\">Operations</a> page. Fields on this page has been deprecated."
+
+          expect(response).to set_flash.now[:alert].to(expected_alert)
+        end
+
+        it 'does not modify service' do
+          expect { put :update, params: project_params.merge(service: service_params) }.not_to change { project.prometheus_service.reload.attributes }
+        end
+      end
+
+      context 'feature flag :settings_operations_prometheus_service is disabled' do
+        before do
+          stub_feature_flags(settings_operations_prometheus_service: false)
+        end
+
+        it 'modifies service' do
+          expect { put :update, params: project_params.merge(service: service_params) }.to change { project.prometheus_service.reload.attributes }
+        end
+      end
+    end
   end
 
   describe 'GET #edit' do
+    context 'Jira service' do
+      let(:service_param) { 'jira' }
+
       before do
-      get :edit, params: project_params(id: 'jira')
+        get :edit, params: project_params(id: service_param)
       end
 
       context 'with approved services' do
@@ -205,6 +242,34 @@ describe Projects::ServicesController do
       end
     end
 
+    context 'Prometheus service' do
+      let(:service_param) { 'prometheus' }
+
+      context 'feature flag :settings_operations_prometheus_service is enabled' do
+        before do
+          stub_feature_flags(settings_operations_prometheus_service: true)
+          get :edit, params: project_params(id: service_param)
+        end
+
+        it 'renders deprecation warning notice' do
+          expected_alert = "You can now manage your Prometheus settings on the <a href=\"#{project_settings_operations_path(project)}\">Operations</a> page. Fields on this page has been deprecated."
+          expect(response).to set_flash.now[:alert].to(expected_alert)
+        end
+      end
+
+      context 'feature flag :settings_operations_prometheus_service is disabled' do
+        before do
+          stub_feature_flags(settings_operations_prometheus_service: false)
+          get :edit, params: project_params(id: service_param)
+        end
+
+        it 'does not render deprecation warning notice' do
+          expect(response).not_to set_flash.now[:alert]
+        end
+      end
+    end
+  end
+
   private
 
   def project_params(opts = {})

spec/features/projects/services/user_activates_prometheus_spec.rb

@@ -15,11 +15,12 @@ describe 'User activates Prometheus' do
     click_link('Prometheus')
   end
 
-  it 'activates service' do
+  it 'does not activate service and informs about deprecation' do
     check('Active')
     fill_in('API URL', with: 'http://prometheus.example.com')
     click_button('Save changes')
 
-    expect(page).to have_content('Prometheus activated.')
+    expect(page).not_to have_content('Prometheus activated.')
+    expect(page).to have_content('Fields on this page has been deprecated.')
   end
 end