Allow administrators to change plan limits via the UI

`Admin Area > CI/CD > Continuous Integration and Deployment` now
has a section to inspect and edit the each CI/CD plan limit.

Changelog: added

app/controllers/admin/plan_limits_controller.rb

@@ -38,6 +38,13 @@ class Admin::PlanLimitsController < Admin::ApplicationController
       pypi_max_file_size
       terraform_module_max_file_size
       generic_packages_max_file_size
+      ci_pipeline_size
+      ci_active_jobs
+      ci_project_subscriptions
+      ci_pipeline_schedules
+      ci_needs_size_limit
+      ci_registered_group_runners
+      ci_registered_project_runners
     ])
   end
 end

app/views/admin/application_settings/ci_cd.html.haml

@@ -20,8 +20,7 @@
       = expanded_by_default? ? _('Collapse') : _('Expand')
     %p
       = _('Customize CI/CD settings, including Auto DevOps, shared runners, and job artifacts.')
-  .settings-content
-    = render 'ci_cd'
+  = render 'ci_cd'
 
 = render_if_exists 'admin/application_settings/required_instance_ci_setting', expanded: expanded_by_default?
 

locale/gitlab.pot

@@ -2606,6 +2606,9 @@ msgstr ""
 msgid "AdminSettings|Auto DevOps domain"
 msgstr ""
 
+msgid "AdminSettings|CI/CD limits"
+msgstr ""
+
 msgid "AdminSettings|Configure Let's Encrypt"
 msgstr ""
 
@@ -2645,6 +2648,24 @@ msgstr ""
 msgid "AdminSettings|Maximum duration of a session for Git operations when 2FA is enabled."
 msgstr ""
 
+msgid "AdminSettings|Maximum number of DAG dependencies that a job can have"
+msgstr ""
+
+msgid "AdminSettings|Maximum number of jobs in a single pipeline"
+msgstr ""
+
+msgid "AdminSettings|Maximum number of pipeline schedules"
+msgstr ""
+
+msgid "AdminSettings|Maximum number of pipeline subscriptions to and from a project"
+msgstr ""
+
+msgid "AdminSettings|Maximum number of runners registered per group"
+msgstr ""
+
+msgid "AdminSettings|Maximum number of runners registered per project"
+msgstr ""
+
 msgid "AdminSettings|New CI/CD variables in projects and groups default to protected."
 msgstr ""
 
@@ -2660,6 +2681,9 @@ msgstr ""
 msgid "AdminSettings|Required pipeline configuration"
 msgstr ""
 
+msgid "AdminSettings|Save %{name} limits"
+msgstr ""
+
 msgid "AdminSettings|Select a CI/CD template"
 msgstr ""
 
@@ -2675,6 +2699,9 @@ msgstr ""
 msgid "AdminSettings|Set a CI/CD template as the required pipeline configuration for all projects in the instance. Project CI/CD configuration merges into the required pipeline configuration when the pipeline runs. %{link_start}What is a required pipeline configuration?%{link_end}"
 msgstr ""
 
+msgid "AdminSettings|Set limit to 0 to disable it."
+msgstr ""
+
 msgid "AdminSettings|Set the initial name and protections for the default branch of new repositories created in the instance."
 msgstr ""
 
@@ -2696,6 +2723,9 @@ msgstr ""
 msgid "AdminSettings|The template for the required pipeline configuration can be one of the GitLab-provided templates, or a custom template added to an instance template repository. %{link_start}How do I create an instance template repository?%{link_end}"
 msgstr ""
 
+msgid "AdminSettings|Total number of jobs in currently active pipelines"
+msgstr ""
+
 msgid "AdminStatistics|Active Users"
 msgstr ""
 

spec/features/admin/admin_settings_spec.rb

@@ -311,7 +311,9 @@ RSpec.describe 'Admin updates settings' do
     end
 
     context 'CI/CD page' do
-      it 'change CI/CD settings' do
+      let_it_be(:default_plan) { create(:default_plan) }
+
+      it 'changes CI/CD settings' do
         visit ci_cd_admin_application_settings_path
 
         page.within('.as-ci-cd') do
@@ -329,6 +331,31 @@ RSpec.describe 'Admin updates settings' do
         expect(page).to have_content "Application settings saved successfully"
       end
 
+      it 'changes CI/CD limits', :aggregate_failures do
+        visit ci_cd_admin_application_settings_path
+
+        page.within('.as-ci-cd') do
+          fill_in 'plan_limits_ci_pipeline_size', with: 10
+          fill_in 'plan_limits_ci_active_jobs', with: 20
+          fill_in 'plan_limits_ci_project_subscriptions', with: 30
+          fill_in 'plan_limits_ci_pipeline_schedules', with: 40
+          fill_in 'plan_limits_ci_needs_size_limit', with: 50
+          fill_in 'plan_limits_ci_registered_group_runners', with: 60
+          fill_in 'plan_limits_ci_registered_project_runners', with: 70
+          click_button 'Save Default limits'
+        end
+
+        limits = default_plan.reload.limits
+        expect(limits.ci_pipeline_size).to eq(10)
+        expect(limits.ci_active_jobs).to eq(20)
+        expect(limits.ci_project_subscriptions).to eq(30)
+        expect(limits.ci_pipeline_schedules).to eq(40)
+        expect(limits.ci_needs_size_limit).to eq(50)
+        expect(limits.ci_registered_group_runners).to eq(60)
+        expect(limits.ci_registered_project_runners).to eq(70)
+        expect(page).to have_content 'Application limits saved successfully'
+      end
+
       context 'Runner Registration' do
         context 'when feature is enabled' do
           before do

spec/views/admin/application_settings/_ci_cd.html.haml_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'admin/application_settings/_ci_cd' do
+  let_it_be(:admin) { create(:admin) }
+  let_it_be(:application_setting) { build(:application_setting) }
+
+  let_it_be(:limits_attributes) do
+    {
+      ci_pipeline_size: 10,
+      ci_active_jobs: 20,
+      ci_project_subscriptions: 30,
+      ci_pipeline_schedules: 40,
+      ci_needs_size_limit: 50,
+      ci_registered_group_runners: 60,
+      ci_registered_project_runners: 70
+    }
+  end
+
+  let_it_be(:default_plan_limits) { create(:plan_limits, :default_plan, **limits_attributes) }
+
+  let(:page) { Capybara::Node::Simple.new(rendered) }
+
+  before do
+    assign(:application_setting, application_setting)
+    allow(view).to receive(:current_user) { admin }
+    allow(view).to receive(:expanded) { true }
+  end
+
+  subject { render partial: 'admin/application_settings/ci_cd' }
+
+  context 'limits' do
+    before do
+      assign(:plans, [default_plan_limits.plan])
+    end
+
+    it 'has fields for CI/CD limits', :aggregate_failures do
+      subject
+
+      expect(rendered).to have_field('Maximum number of jobs in a single pipeline', type: 'number')
+      expect(page.find_field('Maximum number of jobs in a single pipeline').value).to eq('10')
+
+      expect(rendered).to have_field('Total number of jobs in currently active pipelines', type: 'number')
+      expect(page.find_field('Total number of jobs in currently active pipelines').value).to eq('20')
+
+      expect(rendered).to have_field('Maximum number of pipeline subscriptions to and from a project', type: 'number')
+      expect(page.find_field('Maximum number of pipeline subscriptions to and from a project').value).to eq('30')
+
+      expect(rendered).to have_field('Maximum number of pipeline schedules', type: 'number')
+      expect(page.find_field('Maximum number of pipeline schedules').value).to eq('40')
+
+      expect(rendered).to have_field('Maximum number of DAG dependencies that a job can have', type: 'number')
+      expect(page.find_field('Maximum number of DAG dependencies that a job can have').value).to eq('50')
+
+      expect(rendered).to have_field('Maximum number of runners registered per group', type: 'number')
+      expect(page.find_field('Maximum number of runners registered per group').value).to eq('60')
+
+      expect(rendered).to have_field('Maximum number of runners registered per project', type: 'number')
+      expect(page.find_field('Maximum number of runners registered per project').value).to eq('70')
+    end
+
+    it 'does not display the plan name when there is only one plan' do
+      subject
+
+      expect(page).not_to have_selector('a[data-action="plan0"]')
+    end
+  end
+
+  context 'with multiple plans' do
+    let_it_be(:plan) { create(:plan, name: 'Ultimate') }
+    let_it_be(:ultimate_plan_limits) { create(:plan_limits, plan: plan, **limits_attributes) }
+
+    before do
+      assign(:plans, [default_plan_limits.plan, ultimate_plan_limits.plan])
+    end
+
+    it 'displays the plan name when there is more than one plan' do
+      subject
+
+      expect(page).to have_content('Default')
+      expect(page).to have_content('Ultimate')
+      expect(page).to have_selector('a[data-action="plan0"]')
+      expect(page).to have_selector('a[data-action="plan1"]')
+    end
+  end
+end