Added prometheus section in ops page

Manual configuration section in integrations page
is now available in the operations page. This is
behind a feature flag settings_operations_prometheus_service

app/controllers/projects/settings/operations_controller.rb

@@ -8,6 +8,7 @@ module Projects
       helper_method :error_tracking_setting
 
       def show
+        render locals: { prometheus_service: prometheus_service }
       end
 
       def update
@@ -28,6 +29,10 @@ module Projects
 
       private
 
+      def prometheus_service
+        project.find_or_initialize_service(::PrometheusService.to_param)
+      end
+
       def render_update_response(result)
         respond_to do |format|
           format.html do

app/views/projects/settings/operations/_configuration_banner.html.haml

+%b
+  = s_('PrometheusService|Auto configuration')
+
+- if service.manual_configuration?
+  .info-well.p-2.mt-2
+    = s_('PrometheusService|To enable the installation of Prometheus on your clusters, deactivate the manual configuration below')
+- else
+  .container-fluid
+    .row
+      - if service.prometheus_available?
+        .col-sm-2
+          .svg-container
+            = image_tag 'illustrations/monitoring/getting_started.svg'
+        .col-sm-10
+          %p.text-success.prepend-top-default
+            = s_('PrometheusService|Prometheus is being automatically managed on your clusters')
+          = link_to s_('PrometheusService|Manage clusters'), project_clusters_path(project), class: 'btn'
+      - else
+        .col-sm-2
+          = image_tag 'illustrations/monitoring/loading.svg'
+        .col-sm-10
+          %p.prepend-top-default
+            = s_('PrometheusService|Automatically deploy and configure Prometheus on your clusters to monitor your project’s environments')
+          = link_to s_('PrometheusService|Install Prometheus on clusters'), project_clusters_path(project), class: 'btn btn-success'

app/views/projects/settings/operations/_prometheus.html.haml

+%section.settings.no-animate.js-prometheus-settings
+  .settings-header
+    %h4
+      = _('Prometheus')
+    %button.btn.js-settings-toggle{ type: 'button' }
+      = _('Expand')
+    %p
+      = _('Link Prometheus monitoring to GitLab.')
+      = link_to _('More information'), help_page_path('user/project/integrations/prometheus'), target: '_blank', rel: 'noopener noreferrer'
+  .settings-content
+    - if @project
+      = render 'projects/settings/operations/configuration_banner', project: @project, service: service
+
+    %b.append-bottom-default
+      = s_('PrometheusService|Manual configuration')
+
+    - unless service.editable?
+      .info-well
+        = s_('PrometheusService|To enable manual configuration, uninstall Prometheus from your clusters')

app/views/projects/settings/operations/show.html.haml

@@ -4,6 +4,7 @@
 
 = render 'projects/settings/operations/incidents'
 = render 'projects/settings/operations/error_tracking'
+= render 'projects/settings/operations/prometheus', service: prometheus_service if Feature.enabled?(:settings_operations_prometheus_service)
 = render 'projects/settings/operations/external_dashboard'
 = render 'projects/settings/operations/grafana_integration'
 = render_if_exists 'projects/settings/operations/tracing'

ee/spec/views/projects/settings/operations/show.html.haml_spec.rb

@@ -26,7 +26,7 @@ describe 'projects/settings/operations/show' do
       end
 
       it 'links to project.tracing_external_url' do
-        render
+        render template: "projects/settings/operations/show", locals: { prometheus_service: project.find_or_initialize_service('prometheus') }
 
         expect(rendered).to have_link('Tracing', href: tracing_url)
       end
@@ -40,7 +40,7 @@ describe 'projects/settings/operations/show' do
         end
 
         it 'sanitizes external_url' do
-          render
+          render template: "projects/settings/operations/show", locals: { prometheus_service: project.find_or_initialize_service('prometheus') }
 
           expect(tracing_setting.external_url).to eq(malicious_tracing_url)
           expect(rendered).to have_link('Tracing', href: cleaned_url)
@@ -59,7 +59,7 @@ describe 'projects/settings/operations/show' do
       end
 
       it 'links to Tracing page' do
-        render
+        render template: "projects/settings/operations/show", locals: { prometheus_service: project.find_or_initialize_service('prometheus') }
 
         expect(rendered).to have_link('Tracing', href: project_tracing_path(project))
       end

locale/gitlab.pot

@@ -11576,6 +11576,9 @@ msgstr[1] ""
 msgid "Line changes"
 msgstr ""
 
+msgid "Link Prometheus monitoring to GitLab."
+msgstr ""
+
 msgid "Link copied"
 msgstr ""
 
@@ -15374,6 +15377,9 @@ msgstr ""
 msgid "ProjectsNew|Want to house several dependent projects under the same namespace? %{link_start}Create a group.%{link_end}"
 msgstr ""
 
+msgid "Prometheus"
+msgstr ""
+
 msgid "PrometheusAlerts|%{count} alerts applied"
 msgstr ""
 

spec/views/projects/settings/operations/show.html.haml_spec.rb

@@ -26,7 +26,7 @@ describe 'projects/settings/operations/show' do
 
     context 'Settings page ' do
       it 'renders the Operations Settings page' do
-        render
+        render template: "projects/settings/operations/show", locals: { prometheus_service: project.find_or_initialize_service('prometheus') }
 
         expect(rendered).to have_content _('Error Tracking')
         expect(rendered).to have_content _('To link Sentry to GitLab, enter your Sentry URL and Auth Token')