Instance level kubernetes clusters admin

Instance level clusters were already mostly supported, this change adds
admin area controllers for cluster CRUD

2 files changed, 679 insertions, 0 deletions

diff --git a/spec/controllers/admin/clusters/applications_controller_spec.rb b/spec/controllers/admin/clusters/applications_controller_spec.rb
new file mode 100644
index 00000000000..cf202d88acc
--- /dev/null
+++ b/spec/controllers/admin/clusters/applications_controller_spec.rb
@@ -0,0 +1,139 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Admin::Clusters::ApplicationsController do
+  include AccessMatchersForController
+
+  def current_application
+    Clusters::Cluster::APPLICATIONS[application]
+  end
+
+  shared_examples 'a secure endpoint' do
+    it { expect { subject }.to be_allowed_for(:admin) }
+    it { expect { subject }.to be_denied_for(:user) }
+    it { expect { subject }.to be_denied_for(:external) }
+  end
+
+  let(:cluster) { create(:cluster, :instance, :provided_by_gcp) }
+
+  describe 'POST create' do
+    subject do
+      post :create, params: params
+    end
+
+    let(:application) { 'helm' }
+    let(:params) { { application: application, id: cluster.id } }
+
+    describe 'functionality' do
+      let(:admin) { create(:admin) }
+
+      before do
+        sign_in(admin)
+      end
+
+      it 'schedule an application installation' do
+        expect(ClusterInstallAppWorker).to receive(:perform_async).with(application, anything).once
+
+        expect { subject }.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 { subject }.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
+          is_expected.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
+          is_expected.to have_http_status(:bad_request)
+        end
+      end
+    end
+
+    describe 'security' do
+      before do
+        allow(ClusterInstallAppWorker).to receive(:perform_async)
+      end
+
+      it_behaves_like 'a secure endpoint'
+    end
+  end
+
+  describe 'PATCH update' do
+    subject do
+      patch :update, params: params
+    end
+
+    let!(:application) { create(:clusters_applications_cert_managers, :installed, cluster: cluster) }
+    let(:application_name) { application.name }
+    let(:params) { { application: application_name, id: cluster.id, email: "new-email@example.com" } }
+
+    describe 'functionality' do
+      let(:admin) { create(:admin) }
+
+      before do
+        sign_in(admin)
+      end
+
+      context "when cluster and app exists" do
+        it "schedules an application update" do
+          expect(ClusterPatchAppWorker).to receive(:perform_async).with(application.name, anything).once
+
+          is_expected.to have_http_status(:no_content)
+
+          expect(cluster.application_cert_manager).to be_scheduled
+        end
+      end
+
+      context 'when cluster do not exists' do
+        before do
+          cluster.destroy!
+        end
+
+        it { is_expected.to have_http_status(:not_found) }
+      end
+
+      context 'when application is unknown' do
+        let(:application_name) { 'unkwnown-app' }
+
+        it { is_expected.to have_http_status(:not_found) }
+      end
+
+      context 'when application is already scheduled' do
+        before do
+          application.make_scheduled!
+        end
+
+        it { is_expected.to have_http_status(:bad_request) }
+      end
+    end
+
+    describe 'security' do
+      before do
+        allow(ClusterPatchAppWorker).to receive(:perform_async)
+      end
+
+      it_behaves_like 'a secure endpoint'
+    end
+  end
+end
diff --git a/spec/controllers/admin/clusters_controller_spec.rb b/spec/controllers/admin/clusters_controller_spec.rb
new file mode 100644
index 00000000000..c59fc93ae09
--- /dev/null
+++ b/spec/controllers/admin/clusters_controller_spec.rb
@@ -0,0 +1,540 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Admin::ClustersController do
+  include AccessMatchersForController
+  include GoogleApi::CloudPlatformHelpers
+
+  let(:admin) { create(:admin) }
+
+  before do
+    sign_in(admin)
+  end
+
+  describe 'GET index' do
+    def go(params = {})
+      get :index, params: params
+    end
+
+    context 'when feature flag is not enabled' do
+      before do
+        stub_feature_flags(instance_clusters: false)
+      end
+
+      it 'renders 404' do
+        go
+
+        expect(response).to have_gitlab_http_status(404)
+      end
+    end
+
+    context 'when feature flag is enabled' do
+      before do
+        stub_feature_flags(instance_clusters: true)
+      end
+
+      describe 'functionality' do
+        context 'when instance has one or more clusters' do
+          let!(:enabled_cluster) do
+            create(:cluster, :provided_by_gcp, :instance)
+          end
+
+          let!(:disabled_cluster) do
+            create(:cluster, :disabled, :provided_by_gcp, :production_environment, :instance)
+          end
+
+          it 'lists available clusters' do
+            go
+
+            expect(response).to have_gitlab_http_status(:ok)
+            expect(response).to render_template(:index)
+            expect(assigns(:clusters)).to match_array([enabled_cluster, disabled_cluster])
+          end
+
+          context 'when page is specified' do
+            let(:last_page) { Clusters::Cluster.instance_type.page.total_pages }
+
+            before do
+              allow(Clusters::Cluster).to receive(:paginates_per).and_return(1)
+              create_list(:cluster, 2, :provided_by_gcp, :production_environment, :instance)
+            end
+
+            it 'redirects to the page' do
+              go(page: last_page)
+
+              expect(response).to have_gitlab_http_status(:ok)
+              expect(assigns(:clusters).current_page).to eq(last_page)
+            end
+          end
+        end
+
+        context 'when instance does not have a cluster' do
+          it 'returns an empty state page' do
+            go
+
+            expect(response).to have_gitlab_http_status(:ok)
+            expect(response).to render_template(:index, partial: :empty_state)
+            expect(assigns(:clusters)).to eq([])
+          end
+        end
+      end
+    end
+
+    describe 'security' do
+      let(:cluster) { create(:cluster, :provided_by_gcp, :instance) }
+
+      it { expect { go }.to be_allowed_for(:admin) }
+      it { expect { go }.to be_denied_for(:user) }
+      it { expect { go }.to be_denied_for(:external) }
+    end
+  end
+
+  describe 'GET new' do
+    def go
+      get :new
+    end
+
+    describe 'functionality for new cluster' do
+      context 'when omniauth has been configured' do
+        let(:key) { 'secret-key' }
+        let(:session_key_for_redirect_uri) do
+          GoogleApi::CloudPlatform::Client.session_key_for_redirect_uri(key)
+        end
+
+        before do
+          allow(SecureRandom).to receive(:hex).and_return(key)
+        end
+
+        it 'has authorize_url' do
+          go
+
+          expect(assigns(:authorize_url)).to include(key)
+          expect(session[session_key_for_redirect_uri]).to eq(new_admin_cluster_path)
+        end
+      end
+
+      context 'when omniauth has not configured' do
+        before do
+          stub_omniauth_setting(providers: [])
+        end
+
+        it 'does not have authorize_url' do
+          go
+
+          expect(assigns(:authorize_url)).to be_nil
+        end
+      end
+
+      context 'when access token is valid' do
+        before do
+          stub_google_api_validate_token
+        end
+
+        it 'has new object' do
+          go
+
+          expect(assigns(:gcp_cluster)).to be_an_instance_of(Clusters::ClusterPresenter)
+        end
+      end
+
+      context 'when access token is expired' do
+        before do
+          stub_google_api_expired_token
+        end
+
+        it { expect(@valid_gcp_token).to be_falsey }
+      end
+
+      context 'when access token is not stored in session' do
+        it { expect(@valid_gcp_token).to be_falsey }
+      end
+    end
+
+    describe 'functionality for existing cluster' do
+      it 'has new object' do
+        go
+
+        expect(assigns(:user_cluster)).to be_an_instance_of(Clusters::ClusterPresenter)
+      end
+    end
+
+    describe 'security' do
+      it { expect { go }.to be_allowed_for(:admin) }
+      it { expect { go }.to be_denied_for(:user) }
+      it { expect { go }.to be_denied_for(:external) }
+    end
+  end
+
+  describe 'POST create for new cluster' do
+    let(:legacy_abac_param) { 'true' }
+    let(:params) do
+      {
+        cluster: {
+          name: 'new-cluster',
+          provider_gcp_attributes: {
+            gcp_project_id: 'gcp-project-12345',
+            legacy_abac: legacy_abac_param
+          }
+        }
+      }
+    end
+
+    def go
+      post :create_gcp, params: params
+    end
+
+    describe 'functionality' do
+      context 'when access token is valid' do
+        before do
+          stub_google_api_validate_token
+        end
+
+        it 'creates a new cluster' do
+          expect(ClusterProvisionWorker).to receive(:perform_async)
+          expect { go }.to change { Clusters::Cluster.count }
+            .and change { Clusters::Providers::Gcp.count }
+
+          cluster = Clusters::Cluster.instance_type.first
+
+          expect(response).to redirect_to(admin_cluster_path(cluster))
+          expect(cluster).to be_gcp
+          expect(cluster).to be_kubernetes
+          expect(cluster.provider_gcp).to be_legacy_abac
+        end
+
+        context 'when legacy_abac param is false' do
+          let(:legacy_abac_param) { 'false' }
+
+          it 'creates a new cluster with legacy_abac_disabled' do
+            expect(ClusterProvisionWorker).to receive(:perform_async)
+            expect { go }.to change { Clusters::Cluster.count }
+              .and change { Clusters::Providers::Gcp.count }
+            expect(Clusters::Cluster.instance_type.first.provider_gcp).not_to be_legacy_abac
+          end
+        end
+      end
+
+      context 'when access token is expired' do
+        before do
+          stub_google_api_expired_token
+        end
+
+        it { expect(@valid_gcp_token).to be_falsey }
+      end
+
+      context 'when access token is not stored in session' do
+        it { expect(@valid_gcp_token).to be_falsey }
+      end
+    end
+
+    describe 'security' do
+      before do
+        allow_any_instance_of(described_class)
+          .to receive(:token_in_session).and_return('token')
+        allow_any_instance_of(described_class)
+          .to receive(:expires_at_in_session).and_return(1.hour.since.to_i.to_s)
+        allow_any_instance_of(GoogleApi::CloudPlatform::Client)
+          .to receive(:projects_zones_clusters_create) do
+          OpenStruct.new(
+            self_link: 'projects/gcp-project-12345/zones/us-central1-a/operations/ope-123',
+            status: 'RUNNING'
+          )
+        end
+
+        allow(WaitForClusterCreationWorker).to receive(:perform_in).and_return(nil)
+      end
+
+      it { expect { go }.to be_allowed_for(:admin) }
+      it { expect { go }.to be_denied_for(:user) }
+      it { expect { go }.to be_denied_for(:external) }
+    end
+  end
+
+  describe 'POST create for existing cluster' do
+    let(:params) do
+      {
+        cluster: {
+          name: 'new-cluster',
+          platform_kubernetes_attributes: {
+            api_url: 'http://my-url',
+            token: 'test'
+          }
+        }
+      }
+    end
+
+    def go
+      post :create_user, params: params
+    end
+
+    describe 'functionality' do
+      context 'when creates a cluster' do
+        it 'creates a new cluster' do
+          expect(ClusterProvisionWorker).to receive(:perform_async)
+
+          expect { go }.to change { Clusters::Cluster.count }
+            .and change { Clusters::Platforms::Kubernetes.count }
+
+          cluster = Clusters::Cluster.instance_type.first
+
+          expect(response).to redirect_to(admin_cluster_path(cluster))
+          expect(cluster).to be_user
+          expect(cluster).to be_kubernetes
+        end
+      end
+
+      context 'when creates a RBAC-enabled cluster' do
+        let(:params) do
+          {
+            cluster: {
+              name: 'new-cluster',
+              platform_kubernetes_attributes: {
+                api_url: 'http://my-url',
+                token: 'test',
+                authorization_type: 'rbac'
+              }
+            }
+          }
+        end
+
+        it 'creates a new cluster' do
+          expect(ClusterProvisionWorker).to receive(:perform_async)
+
+          expect { go }.to change { Clusters::Cluster.count }
+            .and change { Clusters::Platforms::Kubernetes.count }
+
+          cluster = Clusters::Cluster.instance_type.first
+
+          expect(response).to redirect_to(admin_cluster_path(cluster))
+          expect(cluster).to be_user
+          expect(cluster).to be_kubernetes
+          expect(cluster).to be_platform_kubernetes_rbac
+        end
+      end
+    end
+
+    describe 'security' do
+      it { expect { go }.to be_allowed_for(:admin) }
+      it { expect { go }.to be_denied_for(:user) }
+      it { expect { go }.to be_denied_for(:external) }
+    end
+  end
+
+  describe 'GET cluster_status' do
+    let(:cluster) { create(:cluster, :providing_by_gcp, :instance) }
+
+    def go
+      get :cluster_status,
+        params: {
+          id: cluster
+        },
+        format: :json
+    end
+
+    describe 'functionality' do
+      it 'responds with matching schema' do
+        go
+
+        expect(response).to have_gitlab_http_status(:ok)
+        expect(response).to match_response_schema('cluster_status')
+      end
+
+      it 'invokes schedule_status_update on each application' do
+        expect_any_instance_of(Clusters::Applications::Ingress).to receive(:schedule_status_update)
+
+        go
+      end
+    end
+
+    describe 'security' do
+      it { expect { go }.to be_allowed_for(:admin) }
+      it { expect { go }.to be_denied_for(:user) }
+      it { expect { go }.to be_denied_for(:external) }
+    end
+  end
+
+  describe 'GET show' do
+    let(:cluster) { create(:cluster, :provided_by_gcp, :instance) }
+
+    def go
+      get :show,
+        params: {
+          id: cluster
+        }
+    end
+
+    describe 'functionality' do
+      it 'renders view' do
+        go
+
+        expect(response).to have_gitlab_http_status(:ok)
+        expect(assigns(:cluster)).to eq(cluster)
+      end
+    end
+
+    describe 'security' do
+      it { expect { go }.to be_allowed_for(:admin) }
+      it { expect { go }.to be_denied_for(:user) }
+      it { expect { go }.to be_denied_for(:external) }
+    end
+  end
+
+  describe 'PUT update' do
+    def go(format: :html)
+      put :update, params: params.merge(
+        id: cluster,
+        format: format
+      )
+    end
+
+    let(:cluster) { create(:cluster, :provided_by_user, :instance) }
+    let(:domain) { 'test-domain.com' }
+
+    let(:params) do
+      {
+        cluster: {
+          enabled: false,
+          name: 'my-new-cluster-name',
+          base_domain: domain
+        }
+      }
+    end
+
+    it 'updates and redirects back to show page' do
+      go
+
+      cluster.reload
+      expect(response).to redirect_to(admin_cluster_path(cluster))
+      expect(flash[:notice]).to eq('Kubernetes cluster was successfully updated.')
+      expect(cluster.enabled).to be_falsey
+      expect(cluster.name).to eq('my-new-cluster-name')
+      expect(cluster.domain).to eq('test-domain.com')
+    end
+
+    context 'when domain is invalid' do
+      let(:domain) { 'http://not-a-valid-domain' }
+
+      it 'does not update cluster attributes' do
+        go
+
+        cluster.reload
+        expect(response).to render_template(:show)
+        expect(cluster.name).not_to eq('my-new-cluster-name')
+        expect(cluster.domain).not_to eq('test-domain.com')
+      end
+    end
+
+    context 'when format is json' do
+      context 'when changing parameters' do
+        context 'when valid parameters are used' do
+          let(:params) do
+            {
+              cluster: {
+                enabled: false,
+                name: 'my-new-cluster-name',
+                domain: domain
+              }
+            }
+          end
+
+          it 'updates and redirects back to show page' do
+            go(format: :json)
+
+            cluster.reload
+            expect(response).to have_http_status(:no_content)
+            expect(cluster.enabled).to be_falsey
+            expect(cluster.name).to eq('my-new-cluster-name')
+          end
+        end
+
+        context 'when invalid parameters are used' do
+          let(:params) do
+            {
+              cluster: {
+                enabled: false,
+                name: ''
+              }
+            }
+          end
+
+          it 'rejects changes' do
+            go(format: :json)
+
+            expect(response).to have_http_status(:bad_request)
+          end
+        end
+      end
+    end
+
+    describe 'security' do
+      set(:cluster) { create(:cluster, :provided_by_gcp, :instance) }
+
+      it { expect { go }.to be_allowed_for(:admin) }
+      it { expect { go }.to be_denied_for(:user) }
+      it { expect { go }.to be_denied_for(:external) }
+    end
+  end
+
+  describe 'DELETE destroy' do
+    let!(:cluster) { create(:cluster, :provided_by_gcp, :production_environment, :instance) }
+
+    def go
+      delete :destroy,
+        params: {
+          id: cluster
+        }
+    end
+
+    describe 'functionality' do
+      context 'when cluster is provided by GCP' do
+        context 'when cluster is created' do
+          it 'destroys and redirects back to clusters list' do
+            expect { go }
+              .to change { Clusters::Cluster.count }.by(-1)
+              .and change { Clusters::Platforms::Kubernetes.count }.by(-1)
+              .and change { Clusters::Providers::Gcp.count }.by(-1)
+
+            expect(response).to redirect_to(admin_clusters_path)
+            expect(flash[:notice]).to eq('Kubernetes cluster integration was successfully removed.')
+          end
+        end
+
+        context 'when cluster is being created' do
+          let!(:cluster) { create(:cluster, :providing_by_gcp, :production_environment, :instance) }
+
+          it 'destroys and redirects back to clusters list' do
+            expect { go }
+              .to change { Clusters::Cluster.count }.by(-1)
+              .and change { Clusters::Providers::Gcp.count }.by(-1)
+
+            expect(response).to redirect_to(admin_clusters_path)
+            expect(flash[:notice]).to eq('Kubernetes cluster integration was successfully removed.')
+          end
+        end
+      end
+
+      context 'when cluster is provided by user' do
+        let!(:cluster) { create(:cluster, :provided_by_user, :production_environment, :instance) }
+
+        it 'destroys and redirects back to clusters list' do
+          expect { go }
+            .to change { Clusters::Cluster.count }.by(-1)
+            .and change { Clusters::Platforms::Kubernetes.count }.by(-1)
+            .and change { Clusters::Providers::Gcp.count }.by(0)
+
+          expect(response).to redirect_to(admin_clusters_path)
+          expect(flash[:notice]).to eq('Kubernetes cluster integration was successfully removed.')
+        end
+      end
+    end
+
+    describe 'security' do
+      set(:cluster) { create(:cluster, :provided_by_gcp, :production_environment, :instance) }
+
+      it { expect { go }.to be_allowed_for(:admin) }
+      it { expect { go }.to be_denied_for(:user) }
+      it { expect { go }.to be_denied_for(:external) }
+    end
+  end
+end