Extend clusters_controller for group type clusters

- Add pages javascripts to intialize clusters for group pages

- Move specs asserting gcp specific validations from controller into
UpdateService spec

- Also teach Clusters::ApplicationController about groups

app/assets/javascripts/pages/groups/clusters/destroy/index.js

+import ClustersBundle from '~/clusters/clusters_bundle';
+
+document.addEventListener('DOMContentLoaded', () => {
+  new ClustersBundle(); // eslint-disable-line no-new
+});

app/assets/javascripts/pages/groups/clusters/index/index.js

+import ClustersIndex from '~/clusters/clusters_index';
+
+document.addEventListener('DOMContentLoaded', () => {
+  new ClustersIndex(); // eslint-disable-line no-new
+});

app/assets/javascripts/pages/groups/clusters/show/index.js

+import ClustersBundle from '~/clusters/clusters_bundle';
+
+document.addEventListener('DOMContentLoaded', () => {
+  new ClustersBundle(); // eslint-disable-line no-new
+});

app/assets/javascripts/pages/groups/clusters/update/index.js

+import ClustersBundle from '~/clusters/clusters_bundle';
+
+document.addEventListener('DOMContentLoaded', () => {
+  new ClustersBundle(); // eslint-disable-line no-new
+});

app/assets/javascripts/pages/groups/index.js

+import initDismissableCallout from '~/dismissable_callout';
+import initGkeDropdowns from '~/projects/gke_cluster_dropdowns';
+
+document.addEventListener('DOMContentLoaded', () => {
+  const { page } = document.body.dataset;
+  const newClusterViews = [
+    'groups:clusters:new',
+    'groups:clusters:create_gcp',
+    'groups:clusters:create_user',
+  ];
+
+  if (newClusterViews.indexOf(page) > -1) {
+    initDismissableCallout('.gcp-signup-offer');
+    initGkeDropdowns();
+  }
+});

app/controllers/groups/clusters/applications_controller.rb

+# frozen_string_literal: true
+
+class Groups::Clusters::ApplicationsController < Clusters::ApplicationsController
+  include ControllerWithCrossProjectAccessCheck
+
+  prepend_before_action :group
+  requires_cross_project_access
+
+  private
+
+  def clusterable
+    @clusterable ||= ClusterablePresenter.fabricate(group, current_user: current_user)
+  end
+
+  def group
+    @group ||= find_routable!(Group, params[:group_id] || params[:id])
+  end
+end

app/controllers/groups/clusters_controller.rb

+# frozen_string_literal: true
+
+class Groups::ClustersController < Clusters::ClustersController
+  include ControllerWithCrossProjectAccessCheck
+
+  prepend_before_action :group
+  requires_cross_project_access
+
+  layout 'group'
+
+  private
+
+  def clusterable
+    @clusterable ||= ClusterablePresenter.fabricate(group, current_user: current_user)
+  end
+
+  def group
+    @group ||= find_routable!(Group, params[:group_id] || params[:id])
+  end
+end

app/helpers/clusters_helper.rb

@@ -6,6 +6,14 @@ module ClustersHelper
     false
   end
 
+  def clusterable
+    @project || @group
+  end
+
+  def can_create_cluster?
+    can?(current_user, :create_cluster, clusterable)
+  end
+
   def render_gcp_signup_offer
     return if Gitlab::CurrentSettings.current_application_settings.hide_third_party_offers?
     return unless show_gcp_signup_offer?

app/presenters/clusters/cluster_presenter.rb

@@ -15,6 +15,8 @@ module Clusters
     def show_path
       if cluster.project_type?
         project_cluster_path(project, cluster)
+      elsif cluster.group_type?
+        group_cluster_path(group, cluster)
       else
         raise NotImplementedError
       end

app/presenters/group_clusterable_presenter.rb

+# frozen_string_literal: true
+
+class GroupClusterablePresenter < ClusterablePresenter
+  def cluster_status_cluster_path(cluster, params = {})
+    cluster_status_group_cluster_path(clusterable, cluster, params)
+  end
+
+  def install_applications_cluster_path(cluster, application)
+    install_applications_group_cluster_path(clusterable, cluster, application)
+  end
+
+  def cluster_path(cluster, params = {})
+    group_cluster_path(clusterable, cluster, params)
+  end
+end

app/services/clusters/create_service.rb

@@ -36,6 +36,8 @@ module Clusters
       case clusterable
       when ::Project
         { cluster_type: :project_type, projects: [clusterable] }
+      when ::Group
+        { cluster_type: :group_type, groups: [clusterable] }
       end
     end
 

changelogs/unreleased/34758-group-cluster-controller.yml

+---
+title: Add ability to create group level clusters and install gitlab managed applications
+merge_request: 22450
+author:
+type: added

config/routes/group.rb

@@ -53,6 +53,8 @@ constraints(::Constraints::GroupUrlConstrainer.new) do
 
     resource :avatar, only: [:destroy]
 
+    concerns :clusterable
+
     resources :group_members, only: [:index, :create, :update, :destroy], concerns: :access_requestable do
       post :resend_invite, on: :member
       delete :leave, on: :collection

spec/controllers/groups/clusters/applications_controller_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Groups::Clusters::ApplicationsController do
+  include AccessMatchersForController
+
+  def current_application
+    Clusters::Cluster::APPLICATIONS[application]
+  end
+
+  describe 'POST create' do
+    let(:cluster) { create(:cluster, :group, :provided_by_gcp) }
+    let(:group) { cluster.group }
+    let(:application) { 'helm' }
+    let(:params) { { application: application, id: cluster.id } }
+
+    describe 'functionality' do
+      let(:user) { create(:user) }
+
+      before do
+        group.add_maintainer(user)
+        sign_in(user)
+      end
+
+      it 'schedule an application installation' do
+        expect(ClusterInstallAppWorker).to receive(:perform_async).with(application, anything).once
+
+        expect { go }.to change { current_application.count }
+        expect(response).to have_http_status(:no_content)
+        expect(cluster.application_helm).to be_scheduled
+      end
+
+      context 'when cluster do not exists' do
+        before do
+          cluster.destroy!
+        end
+
+        it 'return 404' do
+          expect { go }.not_to change { current_application.count }
+          expect(response).to have_http_status(:not_found)
+        end
+      end
+
+      context 'when application is unknown' do
+        let(:application) { 'unkwnown-app' }
+
+        it 'return 404' do
+          go
+
+          expect(response).to have_http_status(:not_found)
+        end
+      end
+
+      context 'when application is already installing' do
+        before do
+          create(:clusters_applications_helm, :installing, cluster: cluster)
+        end
+
+        it 'returns 400' do
+          go
+
+          expect(response).to have_http_status(:bad_request)
+        end
+      end
+    end
+
+    describe 'security' do
+      before do
+        allow(ClusterInstallAppWorker).to receive(:perform_async)
+      end
+
+      it { expect { go }.to be_allowed_for(:admin) }
+      it { expect { go }.to be_allowed_for(:owner).of(group) }
+      it { expect { go }.to be_allowed_for(:maintainer).of(group) }
+      it { expect { go }.to be_denied_for(:developer).of(group) }
+      it { expect { go }.to be_denied_for(:reporter).of(group) }
+      it { expect { go }.to be_denied_for(:guest).of(group) }
+      it { expect { go }.to be_denied_for(:user) }
+      it { expect { go }.to be_denied_for(:external) }
+    end
+
+    def go
+      post :create, params.merge(group_id: group)
+    end
+  end
+end

spec/controllers/projects/clusters_controller_spec.rb

@@ -396,20 +396,6 @@ describe Projects::ClustersController do
   end
 
   describe 'PUT update' do
-    let(:cluster) { create(:cluster, :provided_by_gcp, projects: [project]) }
-
-    let(:params) do
-      {
-        cluster: {
-          enabled: false,
-          name: 'my-new-cluster-name',
-          platform_kubernetes_attributes: {
-            namespace: 'my-namespace'
-          }
-        }
-      }
-    end
-
     def go(format: :html)
       put :update, params.merge(namespace_id: project.namespace.to_param,
                                 project_id: project.to_param,
@@ -423,37 +409,6 @@ describe Projects::ClustersController do
       stub_kubeclient_get_namespace('https://kubernetes.example.com', namespace: 'my-namespace')
     end
 
-    context 'when cluster is provided by GCP' do
-      it "updates and redirects back to show page" do
-        go
-
-        cluster.reload
-        expect(response).to redirect_to(project_cluster_path(project, cluster))
-        expect(flash[:notice]).to eq('Kubernetes cluster was successfully updated.')
-        expect(cluster.enabled).to be_falsey
-      end
-
-      it "does not change cluster name" do
-        go
-
-        cluster.reload
-        expect(cluster.name).to eq('test-cluster')
-      end
-
-      context 'when cluster is being created' do
-        let(:cluster) { create(:cluster, :providing_by_gcp, projects: [project]) }
-
-        it "rejects changes" do
-          go
-
-          expect(response).to have_gitlab_http_status(:ok)
-          expect(response).to render_template(:show)
-          expect(cluster.enabled).to be_truthy
-        end
-      end
-    end
-
-    context 'when cluster is provided by user' do
     let(:cluster) { create(:cluster, :provided_by_user, projects: [project]) }
 
     let(:params) do
@@ -525,7 +480,6 @@ describe Projects::ClustersController do
         end
       end
     end
-    end
 
     describe 'security' do
       set(:cluster) { create(:cluster, :provided_by_gcp, projects: [project]) }

spec/presenters/clusters/cluster_presenter_spec.rb

@@ -82,5 +82,12 @@ describe Clusters::ClusterPresenter do
 
       it { is_expected.to eq(project_cluster_path(project, cluster)) }
     end
+
+    context 'group_type cluster' do
+      let(:group) { cluster.group }
+      let(:cluster) { create(:cluster, :provided_by_gcp, :group) }
+
+      it { is_expected.to eq(group_cluster_path(group, cluster)) }
+    end
   end
 end

spec/presenters/group_clusterable_presenter_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe GroupClusterablePresenter do
+  include Gitlab::Routing.url_helpers
+
+  let(:presenter) { described_class.new(group) }
+  let(:cluster) { create(:cluster, :provided_by_gcp, :group) }
+  let(:group) { cluster.group }
+
+  describe '#can_create_cluster?' do
+    let(:user) { create(:user) }
+
+    subject { presenter.can_create_cluster? }
+
+    before do
+      allow(presenter).to receive(:current_user).and_return(user)
+    end
+
+    context 'when user can create' do
+      before do
+        group.add_maintainer(user)
+      end
+
+      it { is_expected.to be_truthy }
+    end
+
+    context 'when user cannot create' do
+      it { is_expected.to be_falsey }
+    end
+  end
+
+  describe '#index_path' do
+    subject { presenter.index_path }
+
+    it { is_expected.to eq(group_clusters_path(group)) }
+  end
+
+  describe '#new_path' do
+    subject { presenter.new_path }
+
+    it { is_expected.to eq(new_group_cluster_path(group)) }
+  end
+
+  describe '#create_user_clusters_path' do
+    subject { presenter.create_user_clusters_path }
+
+    it { is_expected.to eq(create_user_group_clusters_path(group)) }
+  end
+
+  describe '#create_gcp_clusters_path' do
+    subject { presenter.create_gcp_clusters_path }
+
+    it { is_expected.to eq(create_gcp_group_clusters_path(group)) }
+  end
+
+  describe '#cluster_status_cluster_path' do
+    subject { presenter.cluster_status_cluster_path(cluster) }
+
+    it { is_expected.to eq(cluster_status_group_cluster_path(group, cluster)) }
+  end
+
+  describe '#install_applications_cluster_path' do
+    let(:application) { :helm }
+
+    subject { presenter.install_applications_cluster_path(cluster, application) }
+
+    it { is_expected.to eq(install_applications_group_cluster_path(group, cluster, application)) }
+  end
+
+  describe '#cluster_path' do
+    subject { presenter.cluster_path(cluster) }
+
+    it { is_expected.to eq(group_cluster_path(group, cluster)) }
+  end
+end

spec/services/clusters/update_service_spec.rb

@@ -62,5 +62,32 @@ describe Clusters::UpdateService do
         expect(cluster.errors[:"platform_kubernetes.namespace"]).to be_present
       end
     end
+
+    context 'when cluster is provided by GCP' do
+      let(:cluster) { create(:cluster, :project, :provided_by_gcp) }
+
+      let(:params) do
+        {
+          name: 'my-new-name'
+        }
+      end
+
+      it "does not change cluster name" do
+        is_expected.to eq(false)
+
+        cluster.reload
+        expect(cluster.name).to eq('test-cluster')
+      end
+
+      context 'when cluster is being created' do
+        let(:cluster) { create(:cluster, :providing_by_gcp) }
+
+        it "rejects changes" do
+          is_expected.to eq(false)
+
+          expect(cluster.errors.full_messages).to include('cannot modify during creation')
+        end
+      end
+    end
   end
 end