Added Support for Crossplane as gitlab managed apps

Rubocop run

prettified run

Fixed test cases

app/assets/javascripts/clusters/clusters_bundle.js

@@ -8,7 +8,7 @@ import Flash from '../flash';
 import Poll from '../lib/utils/poll';
 import initSettingsPanels from '../settings_panels';
 import eventHub from './event_hub';
-import { APPLICATION_STATUS, INGRESS, INGRESS_DOMAIN_SUFFIX } from './constants';
+import { APPLICATION_STATUS, INGRESS, INGRESS_DOMAIN_SUFFIX, CROSSPLANE } from './constants';
 import ClustersService from './services/clusters_service';
 import ClustersStore from './stores/clusters_store';
 import Applications from './components/applications.vue';
@@ -39,6 +39,7 @@ export default class Clusters {
       installKnativePath,
       updateKnativePath,
       installElasticStackPath,
+      installCrossplanePath,
       installPrometheusPath,
       managePrometheusPath,
       clusterEnvironmentsPath,
@@ -83,6 +84,7 @@ export default class Clusters {
       installHelmEndpoint: installHelmPath,
       installIngressEndpoint: installIngressPath,
       installCertManagerEndpoint: installCertManagerPath,
+      installCrossplaneEndpoint: installCrossplanePath,
       installRunnerEndpoint: installRunnerPath,
       installPrometheusEndpoint: installPrometheusPath,
       installJupyterEndpoint: installJupyterPath,
@@ -227,6 +229,7 @@ export default class Clusters {
     eventHub.$on('saveKnativeDomain', data => this.saveKnativeDomain(data));
     eventHub.$on('setKnativeHostname', data => this.setKnativeHostname(data));
     eventHub.$on('uninstallApplication', data => this.uninstallApplication(data));
+    eventHub.$on('setCrossplaneProviderStack', data => this.setCrossplaneProviderStack(data));
     // Add event listener to all the banner close buttons
     this.addBannerCloseHandler(this.unreachableContainer, 'unreachable');
     this.addBannerCloseHandler(this.authenticationFailureContainer, 'authentication_failure');
@@ -238,6 +241,7 @@ export default class Clusters {
     eventHub.$off('updateApplication', this.updateApplication);
     eventHub.$off('saveKnativeDomain');
     eventHub.$off('setKnativeHostname');
+    eventHub.$off('setCrossplaneProviderStack');
     eventHub.$off('uninstallApplication');
   }
 
@@ -404,18 +408,33 @@ export default class Clusters {
   }
 
   installApplication({ id: appId, params }) {
-    this.store.updateAppProperty(appId, 'requestReason', null);
-    this.store.updateAppProperty(appId, 'statusReason', null);
+    return Clusters.validateInstallation(appId, params)
+      .then(() => {
+        this.store.updateAppProperty(appId, 'requestReason', null);
+        this.store.updateAppProperty(appId, 'statusReason', null);
+        this.store.installApplication(appId);
+
+        // eslint-disable-next-line promise/no-nesting
+        this.service.installApplication(appId, params).catch(() => {
+          this.store.notifyInstallFailure(appId);
+          this.store.updateAppProperty(
+            appId,
+            'requestReason',
+            s__('ClusterIntegration|Request to begin installing failed'),
+          );
+        });
+      })
+      .catch(error => this.store.updateAppProperty(appId, 'validationError', error));
+  }
 
-    this.store.installApplication(appId);
+  static validateInstallation(appId, params) {
+    return new Promise((resolve, reject) => {
+      if (appId === CROSSPLANE && !params.stack) {
+        reject(s__('ClusterIntegration|Select a stack to install Crossplane.'));
+        return;
+      }
 
-    return this.service.installApplication(appId, params).catch(() => {
-      this.store.notifyInstallFailure(appId);
-      this.store.updateAppProperty(
-        appId,
-        'requestReason',
-        s__('ClusterIntegration|Request to begin installing failed'),
-      );
+      resolve();
     });
   }
 
@@ -463,6 +482,12 @@ export default class Clusters {
     this.store.updateAppProperty(appId, 'hostname', data.hostname);
   }
 
+  setCrossplaneProviderStack(data) {
+    const appId = data.id;
+    this.store.updateAppProperty(appId, 'stack', data.stack.code);
+    this.store.updateAppProperty(appId, 'validationError', null);
+  }
+
   destroy() {
     this.destroyed = true;
 

app/assets/javascripts/clusters/components/crossplane_provider_stack.vue

+<script>
+import { GlDropdown, GlDropdownItem } from '@gitlab/ui';
+import Icon from '~/vue_shared/components/icon.vue';
+import { s__ } from '../../locale';
+
+export default {
+  name: 'CrossplaneProviderStack',
+  components: {
+    GlDropdown,
+    GlDropdownItem,
+    Icon,
+  },
+  props: {
+    stacks: {
+      type: Array,
+      required: false,
+      default: () => [
+        {
+          name: s__('Google Cloud Platform'),
+          code: 'gcp',
+        },
+        {
+          name: s__('Amazon Web Services'),
+          code: 'aws',
+        },
+        {
+          name: s__('Microsoft Azure'),
+          code: 'azure',
+        },
+        {
+          name: s__('Rook'),
+          code: 'rook',
+        },
+      ],
+    },
+    crossplane: {
+      type: Object,
+      required: true,
+    },
+  },
+  computed: {
+    dropdownText() {
+      const result = this.stacks.reduce((map, obj) => {
+        // eslint-disable-next-line no-param-reassign
+        map[obj.code] = obj.name;
+        return map;
+      }, {});
+      const { stack } = this.crossplane;
+      if (stack !== '') {
+        return result[stack];
+      }
+      return s__('Select Stack');
+    },
+    validationError() {
+      return this.crossplane.validationError;
+    },
+  },
+  methods: {
+    selectStack(stack) {
+      this.$emit('set', stack);
+    },
+  },
+};
+</script>
+
+<template>
+  <div>
+    <label>
+      {{ s__('ClusterIntegration|Enabled stack') }}
+    </label>
+    <gl-dropdown
+      :disabled="crossplane.installed"
+      :text="dropdownText"
+      toggle-class="dropdown-menu-toggle gl-field-error-outline"
+      class="w-100"
+      :class="{ 'gl-show-field-errors': validationError }"
+    >
+      <gl-dropdown-item v-for="stack in stacks" :key="stack.code" @click="selectStack(stack)">
+        <span class="ml-1">{{ stack.name }}</span>
+      </gl-dropdown-item>
+    </gl-dropdown>
+    <span v-if="validationError" class="gl-field-error">{{ validationError }}</span>
+    <p class="form-text text-muted">
+      {{ s__(`You must select a stack for configuring your cloud provider. Learn more about`) }}
+      <a
+        href="https://crossplane.io/docs/master/stacks-guide.html"
+        target="_blank"
+        rel="noopener noreferrer"
+        >{{ __('Crossplane') }}</a
+      >
+    </p>
+  </div>
+</template>

app/assets/javascripts/clusters/constants.js

@@ -50,6 +50,7 @@ export const JUPYTER = 'jupyter';
 export const KNATIVE = 'knative';
 export const RUNNER = 'runner';
 export const CERT_MANAGER = 'cert_manager';
+export const CROSSPLANE = 'crossplane';
 export const PROMETHEUS = 'prometheus';
 export const ELASTIC_STACK = 'elastic_stack';
 

app/assets/javascripts/clusters/services/clusters_service.js

@@ -7,6 +7,7 @@ export default class ClusterService {
       helm: this.options.installHelmEndpoint,
       ingress: this.options.installIngressEndpoint,
       cert_manager: this.options.installCertManagerEndpoint,
+      crossplane: this.options.installCrossplaneEndpoint,
       runner: this.options.installRunnerEndpoint,
       prometheus: this.options.installPrometheusEndpoint,
       jupyter: this.options.installJupyterEndpoint,

app/assets/javascripts/clusters/stores/clusters_store.js

@@ -6,6 +6,7 @@ import {
   KNATIVE,
   CERT_MANAGER,
   ELASTIC_STACK,
+  CROSSPLANE,
   RUNNER,
   APPLICATION_INSTALLED_STATUSES,
   APPLICATION_STATUS,
@@ -26,6 +27,7 @@ const applicationInitialState = {
   uninstallable: false,
   uninstallFailed: false,
   uninstallSuccessful: false,
+  validationError: null,
 };
 
 export default class ClusterStore {
@@ -58,6 +60,11 @@ export default class ClusterStore {
           title: s__('ClusterIntegration|Cert-Manager'),
           email: null,
         },
+        crossplane: {
+          ...applicationInitialState,
+          title: s__('ClusterIntegration|Crossplane'),
+          stack: null,
+        },
         runner: {
           ...applicationInitialState,
           title: s__('ClusterIntegration|GitLab Runner'),
@@ -203,6 +210,9 @@ export default class ClusterStore {
       } else if (appId === CERT_MANAGER) {
         this.state.applications.cert_manager.email =
           this.state.applications.cert_manager.email || serverAppEntry.email;
+      } else if (appId === CROSSPLANE) {
+        this.state.applications.crossplane.stack =
+          this.state.applications.crossplane.stack || serverAppEntry.stack;
       } else if (appId === JUPYTER) {
         this.state.applications.jupyter.hostname = this.updateHostnameIfUnset(
           this.state.applications.jupyter.hostname,

app/controllers/clusters/applications_controller.rb

@@ -47,7 +47,7 @@ class Clusters::ApplicationsController < Clusters::BaseController
   end
 
   def cluster_application_params
-    params.permit(:application, :hostname, :kibana_hostname, :email)
+    params.permit(:application, :hostname, :kibana_hostname, :email, :stack)
   end
 
   def cluster_application_destroy_params

app/controllers/clusters/clusters_controller.rb

@@ -17,6 +17,7 @@ class Clusters::ClustersController < Clusters::BaseController
   end
   before_action only: [:show] do
     push_frontend_feature_flag(:enable_cluster_application_elastic_stack)
+    push_frontend_feature_flag(:enable_cluster_application_crossplane)
   end
 
   helper_method :token_in_session

app/models/clusters/applications/crossplane.rb

+# frozen_string_literal: true
+
+module Clusters
+  module Applications
+    class Crossplane < ApplicationRecord
+      VERSION = '0.4.1'
+
+      self.table_name = 'clusters_applications_crossplane'
+
+      include ::Clusters::Concerns::ApplicationCore
+      include ::Clusters::Concerns::ApplicationStatus
+      include ::Clusters::Concerns::ApplicationVersion
+      include ::Clusters::Concerns::ApplicationData
+
+      default_value_for :version, VERSION
+
+      default_value_for :stack do |crossplane|
+        ''
+      end
+
+      validates :stack, presence: true
+
+      def chart
+        'crossplane/crossplane'
+      end
+
+      def repository
+        'https://charts.crossplane.io/alpha'
+      end
+
+      def install_command
+        Gitlab::Kubernetes::Helm::InstallCommand.new(
+          name: 'crossplane',
+          repository: repository,
+          version: VERSION,
+          rbac: cluster.platform_kubernetes_rbac?,
+          chart: chart,
+          files: files
+        )
+      end
+
+      def values
+        crossplane_values.to_yaml
+      end
+
+      private
+
+      def crossplane_values
+        {
+          "clusterStacks" => {
+             self.stack => {
+               "deploy" => true,
+                  "version" => "alpha"
+            }
+          }
+        }
+      end
+    end
+  end
+end

app/models/clusters/cluster.rb

@@ -14,6 +14,7 @@ module Clusters
       Applications::Helm.application_name => Applications::Helm,
       Applications::Ingress.application_name => Applications::Ingress,
       Applications::CertManager.application_name => Applications::CertManager,
+      Applications::Crossplane.application_name => Applications::Crossplane,
       Applications::Prometheus.application_name => Applications::Prometheus,
       Applications::Runner.application_name => Applications::Runner,
       Applications::Jupyter.application_name => Applications::Jupyter,
@@ -47,6 +48,7 @@ module Clusters
     has_one_cluster_application :helm
     has_one_cluster_application :ingress
     has_one_cluster_application :cert_manager
+    has_one_cluster_application :crossplane
     has_one_cluster_application :prometheus
     has_one_cluster_application :runner
     has_one_cluster_application :jupyter

app/serializers/cluster_application_entity.rb

@@ -10,6 +10,7 @@ class ClusterApplicationEntity < Grape::Entity
   expose :hostname, if: -> (e, _) { e.respond_to?(:hostname) }
   expose :kibana_hostname, if: -> (e, _) { e.respond_to?(:kibana_hostname) }
   expose :email, if: -> (e, _) { e.respond_to?(:email) }
+  expose :stack, if: -> (e, _) { e.respond_to?(:stack) }
   expose :update_available?, as: :update_available, if: -> (e, _) { e.respond_to?(:update_available?) }
   expose :can_uninstall?, as: :can_uninstall
 end

app/services/clusters/applications/base_service.rb

@@ -27,6 +27,10 @@ module Clusters
             application.email = params[:email]
           end
 
+          if application.has_attribute?(:stack)
+            application.stack = params[:stack]
+          end
+
           if application.respond_to?(:oauth_application)
             application.oauth_application = create_oauth_application(application, request)
           end
@@ -64,7 +68,7 @@ module Clusters
       end
 
       def invalid_application?
-        unknown_application? || (application_name == Applications::ElasticStack.application_name && !Feature.enabled?(:enable_cluster_application_elastic_stack))
+        unknown_application? || (application_name == Applications::ElasticStack.application_name && !Feature.enabled?(:enable_cluster_application_elastic_stack)) || (application_name == Applications::Crossplane.application_name && !Feature.enabled?(:enable_cluster_application_crossplane))
       end
 
       def unknown_application?

app/views/clusters/clusters/show.html.haml

@@ -12,6 +12,7 @@
   install_helm_path: clusterable.install_applications_cluster_path(@cluster, :helm),
   install_ingress_path: clusterable.install_applications_cluster_path(@cluster, :ingress),
   install_cert_manager_path: clusterable.install_applications_cluster_path(@cluster, :cert_manager),
+  install_crossplane_path: clusterable.install_applications_cluster_path(@cluster, :crossplane),
   install_prometheus_path: clusterable.install_applications_cluster_path(@cluster, :prometheus),
   install_runner_path: clusterable.install_applications_cluster_path(@cluster, :runner),
   install_jupyter_path: clusterable.install_applications_cluster_path(@cluster, :jupyter),

changelogs/unreleased/18797-support-for-crossplane-as-a-managed-app.yml

+---
+title: Support for Crossplane as a managed app
+merge_request: 18797
+author: Mahendra Bagul
+type: added

db/migrate/20191017191341_create_clusters_applications_crossplane.rb

+# frozen_string_literal: true
+
+class CreateClustersApplicationsCrossplane < ActiveRecord::Migration[5.2]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def change
+    create_table :clusters_applications_crossplane do |t|
+      t.timestamps_with_timezone null: false
+      t.references :cluster, null: false, index: false, foreign_key: { on_delete: :cascade }
+      t.integer :status, null: false
+      t.string :version, null: false, limit: 255
+      t.string :stack, null: false, limit: 255
+      t.text :status_reason
+      t.index :cluster_id, unique: true
+    end
+  end
+end

db/schema.rb

@@ -1078,6 +1078,17 @@ ActiveRecord::Schema.define(version: 2019_11_14_173624) do
     t.index ["cluster_id"], name: "index_clusters_applications_cert_managers_on_cluster_id", unique: true
   end
 
+  create_table "clusters_applications_crossplane", id: :serial, force: :cascade do |t|
+    t.datetime_with_timezone "created_at", null: false
+    t.datetime_with_timezone "updated_at", null: false
+    t.bigint "cluster_id", null: false
+    t.integer "status", null: false
+    t.string "version", limit: 255, null: false
+    t.string "stack", limit: 255, null: false
+    t.text "status_reason"
+    t.index ["cluster_id"], name: "index_clusters_applications_crossplane_on_cluster_id", unique: true
+  end
+
   create_table "clusters_applications_elastic_stacks", force: :cascade do |t|
     t.datetime_with_timezone "created_at", null: false
     t.datetime_with_timezone "updated_at", null: false
@@ -4222,6 +4233,7 @@ ActiveRecord::Schema.define(version: 2019_11_14_173624) do
   add_foreign_key "clusters", "projects", column: "management_project_id", name: "fk_f05c5e5a42", on_delete: :nullify
   add_foreign_key "clusters", "users", on_delete: :nullify
   add_foreign_key "clusters_applications_cert_managers", "clusters", on_delete: :cascade
+  add_foreign_key "clusters_applications_crossplane", "clusters", on_delete: :cascade
   add_foreign_key "clusters_applications_elastic_stacks", "clusters", on_delete: :cascade
   add_foreign_key "clusters_applications_helm", "clusters", on_delete: :cascade
   add_foreign_key "clusters_applications_ingress", "clusters", on_delete: :cascade

lib/gitlab/usage_data.rb

@@ -73,6 +73,7 @@ module Gitlab
             clusters_applications_helm: count(::Clusters::Applications::Helm.available),
             clusters_applications_ingress: count(::Clusters::Applications::Ingress.available),
             clusters_applications_cert_managers: count(::Clusters::Applications::CertManager.available),
+            clusters_applications_crossplane: count(::Clusters::Applications::Crossplane.available),
             clusters_applications_prometheus: count(::Clusters::Applications::Prometheus.available),
             clusters_applications_runner: count(::Clusters::Applications::Runner.available),
             clusters_applications_knative: count(::Clusters::Applications::Knative.available),

locale/gitlab.pot

@@ -1495,6 +1495,9 @@ msgstr ""
 msgid "Amazon EKS integration allows you to provision EKS clusters from GitLab."
 msgstr ""
 
+msgid "Amazon Web Services"
+msgstr ""
+
 msgid "Amazon authentication is not %{link_start}correctly configured%{link_end}. Ask your GitLab administrator if you want to use this service."
 msgstr ""
 
@@ -3646,6 +3649,12 @@ msgstr ""
 msgid "ClusterIntegration|Creating Kubernetes cluster"
 msgstr ""
 
+msgid "ClusterIntegration|Crossplane"
+msgstr ""
+
+msgid "ClusterIntegration|Crossplane enables declarative provisioning of managed services from your cloud of choice using %{kubectl} or %{gitlabIntegrationLink}. Crossplane runs inside your Kubernetes cluster and supports secure connectivity and secrets management between app containers and the cloud services they depend on."
+msgstr ""
+
 msgid "ClusterIntegration|Did you know?"
 msgstr ""
 
@@ -3661,6 +3670,9 @@ msgstr ""
 msgid "ClusterIntegration|Enable this setting if using role-based access control (RBAC)."
 msgstr ""
 
+msgid "ClusterIntegration|Enabled stack"
+msgstr ""
+
 msgid "ClusterIntegration|Enter the details for your Amazon EKS Kubernetes cluster"
 msgstr ""
 
@@ -3709,6 +3721,9 @@ msgstr ""
 msgid "ClusterIntegration|GitLab-managed cluster"
 msgstr ""
 
+msgid "ClusterIntegration|Gitlab Integration"
+msgstr ""
+
 msgid "ClusterIntegration|Google Cloud Platform project"
 msgstr ""
 
@@ -4030,6 +4045,9 @@ msgstr ""
 msgid "ClusterIntegration|Select a region to choose a VPC"
 msgstr ""
 
+msgid "ClusterIntegration|Select a stack to install Crossplane."
+msgstr ""
+
 msgid "ClusterIntegration|Select machine type"
 msgstr ""
 
@@ -4982,6 +5000,9 @@ msgstr ""
 msgid "Cron syntax"
 msgstr ""
 
+msgid "Crossplane"
+msgstr ""
+
 msgid "Current Branch"
 msgstr ""
 
@@ -8442,6 +8463,9 @@ msgstr ""
 msgid "Golden Tanuki"
 msgstr ""
 
+msgid "Google Cloud Platform"
+msgstr ""
+
 msgid "Google Code import"
 msgstr ""
 
@@ -10885,6 +10909,9 @@ msgstr ""
 msgid "Metrics|e.g. req/sec"
 msgstr ""
 
+msgid "Microsoft Azure"
+msgstr ""
+
 msgid "Migrated %{success_count}/%{total_count} files."
 msgstr ""
 
@@ -14669,6 +14696,9 @@ msgstr ""
 msgid "Rollback"
 msgstr ""
 
+msgid "Rook"
+msgstr ""
+
 msgid "Run CI/CD pipelines for external repositories"
 msgstr ""
 
@@ -15243,6 +15273,9 @@ msgstr ""
 msgid "Select Page"
 msgstr ""
 
+msgid "Select Stack"
+msgstr ""
+
 msgid "Select a file from the left sidebar to begin editing. Afterwards, you'll be able to commit your changes."
 msgstr ""
 
@@ -19854,6 +19887,9 @@ msgstr ""
 msgid "You must provide your current password in order to change it."
 msgstr ""
 
+msgid "You must select a stack for configuring your cloud provider. Learn more about"
+msgstr ""
+
 msgid "You need a different license to enable FileLocks feature"
 msgstr ""
 

spec/factories/clusters/applications/helm.rb

@@ -83,6 +83,11 @@ FactoryBot.define do
       cluster factory: %i(cluster with_installed_helm provided_by_gcp)
     end
 
+    factory :clusters_applications_crossplane, class: Clusters::Applications::Crossplane do
+      stack { 'gcp' }
+      cluster factory: %i(cluster with_installed_helm provided_by_gcp)
+    end
+
     factory :clusters_applications_prometheus, class: Clusters::Applications::Prometheus do
       cluster factory: %i(cluster with_installed_helm provided_by_gcp)
     end

spec/fixtures/api/schemas/cluster_status.json

@@ -37,6 +37,7 @@
         "hostname": { "type": ["string", "null"] },
         "kibana_hostname": { "type": ["string", "null"] },
         "email": { "type": ["string", "null"] },
+        "stack": { "type": ["string", "null"] },
         "update_available": { "type": ["boolean", "null"] },
         "can_uninstall": { "type": "boolean" }
       },

spec/frontend/clusters/clusters_bundle_spec.js

@@ -286,16 +286,21 @@ describe('Clusters', () => {
   });
 
   describe('installApplication', () => {
-    it.each(APPLICATIONS)('tries to install %s', applicationId => {
-      jest.spyOn(cluster.service, 'installApplication').mockResolvedValueOnce();
+    it.each(APPLICATIONS)('tries to install %s', (applicationId, done) => {
+      jest.spyOn(cluster.service, 'installApplication').mockResolvedValue();
 
       cluster.store.state.applications[applicationId].status = INSTALLABLE;
 
-      cluster.installApplication({ id: applicationId });
-
-      expect(cluster.store.state.applications[applicationId].status).toEqual(INSTALLING);
-      expect(cluster.store.state.applications[applicationId].requestReason).toEqual(null);
-      expect(cluster.service.installApplication).toHaveBeenCalledWith(applicationId, undefined);
+      // eslint-disable-next-line promise/valid-params
+      cluster
+        .installApplication({ id: applicationId })
+        .then(() => {
+          expect(cluster.store.state.applications[applicationId].status).toEqual(INSTALLING);
+          expect(cluster.store.state.applications[applicationId].requestReason).toEqual(null);
+          expect(cluster.service.installApplication).toHaveBeenCalledWith(applicationId, undefined);
+          done();
+        })
+        .catch();
     });
 
     it('sets error request status when the request fails', () => {

spec/frontend/clusters/components/applications_spec.js

@@ -6,6 +6,7 @@ import { APPLICATIONS_MOCK_STATE } from '../services/mock_data';
 import eventHub from '~/clusters/event_hub';
 import { shallowMount } from '@vue/test-utils';
 import KnativeDomainEditor from '~/clusters/components/knative_domain_editor.vue';
+import CrossplaneProviderStack from '~/clusters/components/crossplane_provider_stack.vue';
 
 describe('Applications', () => {
   let vm;
@@ -16,6 +17,7 @@ describe('Applications', () => {
 
     gon.features = gon.features || {};
     gon.features.enableClusterApplicationElasticStack = true;
+    gon.features.enableClusterApplicationCrossplane = true;
   });
 
   afterEach(() => {
@@ -42,6 +44,10 @@ describe('Applications', () => {
       expect(vm.$el.querySelector('.js-cluster-application-row-cert_manager')).not.toBeNull();
     });
 
+    it('renders a row for Crossplane', () => {
+      expect(vm.$el.querySelector('.js-cluster-application-row-crossplane')).not.toBeNull();
+    });
+
     it('renders a row for Prometheus', () => {
       expect(vm.$el.querySelector('.js-cluster-application-row-prometheus')).not.toBeNull();
     });
@@ -83,6 +89,10 @@ describe('Applications', () => {
       expect(vm.$el.querySelector('.js-cluster-application-row-cert_manager')).not.toBeNull();
     });
 
+    it('renders a row for Crossplane', () => {
+      expect(vm.$el.querySelector('.js-cluster-application-row-crossplane')).not.toBeNull();
+    });
+
     it('renders a row for Prometheus', () => {
       expect(vm.$el.querySelector('.js-cluster-application-row-prometheus')).not.toBeNull();
     });
@@ -124,6 +134,10 @@ describe('Applications', () => {
       expect(vm.$el.querySelector('.js-cluster-application-row-cert_manager')).not.toBeNull();
     });
 
+    it('renders a row for Crossplane', () => {
+      expect(vm.$el.querySelector('.js-cluster-application-row-crossplane')).not.toBeNull();
+    });
+
     it('renders a row for Prometheus', () => {
       expect(vm.$el.querySelector('.js-cluster-application-row-prometheus')).not.toBeNull();
     });
@@ -179,6 +193,7 @@ describe('Applications', () => {
               },
               helm: { title: 'Helm Tiller' },
               cert_manager: { title: 'Cert-Manager' },
+              crossplane: { title: 'Crossplane', stack: '' },
               runner: { title: 'GitLab Runner' },
               prometheus: { title: 'Prometheus' },
               jupyter: { title: 'JupyterHub', hostname: '' },
@@ -390,6 +405,32 @@ describe('Applications', () => {
     });
   });
 
+  describe('Crossplane application', () => {
+    const propsData = {
+      applications: {
+        ...APPLICATIONS_MOCK_STATE,
+        crossplane: {
+          title: 'Crossplane',
+          stack: {
+            code: '',
+          },
+        },
+      },
+    };
+
+    let wrapper;
+    beforeEach(() => {
+      wrapper = shallowMount(Applications, { propsData });
+    });
+    afterEach(() => {
+      wrapper.destroy();
+    });
+    it('renders the correct Component', () => {
+      const crossplane = wrapper.find(CrossplaneProviderStack);
+      expect(crossplane.exists()).toBe(true);
+    });
+  });
+
   describe('Elastic Stack application', () => {
     describe('with ingress installed with ip & elastic stack installable', () => {
       it('renders hostname active input', () => {

spec/frontend/clusters/services/crossplane_provider_stack_spec.js

+import { shallowMount } from '@vue/test-utils';
+import { GlDropdownItem } from '@gitlab/ui';
+import CrossplaneProviderStack from '~/clusters/components/crossplane_provider_stack.vue';
+
+describe('CrossplaneProviderStack component', () => {
+  let wrapper;
+
+  const defaultProps = {
+    stacks: [
+      {
+        name: 'Google Cloud Platform',
+        code: 'gcp',
+      },
+      {
+        name: 'Amazon Web Services',
+        code: 'aws',
+      },
+    ],
+  };
+
+  function createComponent(props = {}) {
+    const propsData = {
+      ...defaultProps,
+      ...props,
+    };
+
+    wrapper = shallowMount(CrossplaneProviderStack, {
+      propsData,
+    });
+  }
+
+  beforeEach(() => {
+    const crossplane = {
+      title: 'crossplane',
+      stack: '',
+    };
+    createComponent({ crossplane });
+  });
+
+  const findDropdownElements = () => wrapper.findAll(GlDropdownItem);
+  const findFirstDropdownElement = () => findDropdownElements().at(0);
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('renders all of the available stacks in the dropdown', () => {
+    const dropdownElements = findDropdownElements();
+
+    expect(dropdownElements.length).toBe(defaultProps.stacks.length);
+
+    defaultProps.stacks.forEach((stack, index) =>
+      expect(dropdownElements.at(index).text()).toEqual(stack.name),
+    );
+  });
+
+  it('displays the correct label for the first dropdown item if a stack is selected', () => {
+    const crossplane = {
+      title: 'crossplane',
+      stack: 'gcp',
+    };
+    createComponent({ crossplane });
+    expect(wrapper.vm.dropdownText).toBe('Google Cloud Platform');
+  });
+
+  it('emits the "set" event with the selected stack value', () => {
+    const crossplane = {
+      title: 'crossplane',
+      stack: 'gcp',
+    };
+    createComponent({ crossplane });
+    findFirstDropdownElement().vm.$emit('click');
+    expect(wrapper.emitted().set[0][0].code).toEqual('gcp');
+  });
+  it('it renders the correct dropdown text when no stack is selected', () => {
+    expect(wrapper.vm.dropdownText).toBe('Select Stack');
+  });
+});

spec/frontend/clusters/services/mock_data.js

@@ -52,9 +52,15 @@ const CLUSTERS_MOCK_DATA = {
             email: 'test@example.com',
             can_uninstall: false,
           },
+          {
+            name: 'crossplane',
+            status: APPLICATION_STATUS.ERROR,
+            status_reason: 'Cannot connect',
+            can_uninstall: false,
+          },
           {
             name: 'elastic_stack',
-            status: APPLICATION_STATUS.INSTALLING,
+            status: APPLICATION_STATUS.ERROR,
             status_reason: 'Cannot connect',
             can_uninstall: false,
           },
@@ -104,6 +110,12 @@ const CLUSTERS_MOCK_DATA = {
             status_reason: 'Cannot connect',
             email: 'test@example.com',
           },
+          {
+            name: 'crossplane',
+            status: APPLICATION_STATUS.ERROR,
+            status_reason: 'Cannot connect',
+            stack: 'gcp',
+          },
           {
             name: 'elastic_stack',
             status: APPLICATION_STATUS.ERROR,
@@ -116,6 +128,7 @@ const CLUSTERS_MOCK_DATA = {
   POST: {
     '/gitlab-org/gitlab-shell/clusters/1/applications/helm': {},
     '/gitlab-org/gitlab-shell/clusters/1/applications/ingress': {},
+    '/gitlab-org/gitlab-shell/clusters/1/applications/crossplane': {},
     '/gitlab-org/gitlab-shell/clusters/1/applications/cert_manager': {},
     '/gitlab-org/gitlab-shell/clusters/1/applications/runner': {},
     '/gitlab-org/gitlab-shell/clusters/1/applications/prometheus': {},
@@ -138,6 +151,7 @@ const DEFAULT_APPLICATION_STATE = {
 const APPLICATIONS_MOCK_STATE = {
   helm: { title: 'Helm Tiller', status: 'installable' },
   ingress: { title: 'Ingress', status: 'installable' },
+  crossplane: { title: 'Crossplane', status: 'installable', stack: '' },
   cert_manager: { title: 'Cert-Manager', status: 'installable' },
   runner: { title: 'GitLab Runner' },
   prometheus: { title: 'Prometheus' },

spec/frontend/clusters/stores/clusters_store_spec.js

@@ -71,6 +71,7 @@ describe('Clusters Store', () => {
             uninstallable: false,
             uninstallSuccessful: false,
             uninstallFailed: false,
+            validationError: null,
           },
           ingress: {
             title: 'Ingress',
@@ -84,6 +85,7 @@ describe('Clusters Store', () => {
             uninstallable: false,
             uninstallSuccessful: false,
             uninstallFailed: false,
+            validationError: null,
           },
           runner: {
             title: 'GitLab Runner',
@@ -100,6 +102,7 @@ describe('Clusters Store', () => {
             uninstallable: false,
             uninstallSuccessful: false,
             uninstallFailed: false,
+            validationError: null,
           },
           prometheus: {
             title: 'Prometheus',
@@ -111,6 +114,7 @@ describe('Clusters Store', () => {
             uninstallable: false,
             uninstallSuccessful: false,
             uninstallFailed: false,
+            validationError: null,
           },
           jupyter: {
             title: 'JupyterHub',
@@ -123,6 +127,7 @@ describe('Clusters Store', () => {
             uninstallable: false,
             uninstallSuccessful: false,
             uninstallFailed: false,
+            validationError: null,
           },
           knative: {
             title: 'Knative',
@@ -140,6 +145,7 @@ describe('Clusters Store', () => {
             uninstallFailed: false,
             updateSuccessful: false,
             updateFailed: false,
+            validationError: null,
           },
           cert_manager: {
             title: 'Cert-Manager',
@@ -152,11 +158,12 @@ describe('Clusters Store', () => {
             uninstallable: false,
             uninstallSuccessful: false,
             uninstallFailed: false,
+            validationError: null,
           },
           elastic_stack: {
             title: 'Elastic Stack',
-            status: mockResponseData.applications[7].status,
-            installFailed: false,
+            status: APPLICATION_STATUS.INSTALLABLE,
+            installFailed: true,
             statusReason: mockResponseData.applications[7].status_reason,
             requestReason: null,
             kibana_hostname: '',
@@ -164,6 +171,19 @@ describe('Clusters Store', () => {
             uninstallable: false,
             uninstallSuccessful: false,
             uninstallFailed: false,
+            validationError: null,
+          },
+          crossplane: {
+            title: 'Crossplane',
+            status: APPLICATION_STATUS.INSTALLABLE,
+            installFailed: true,
+            statusReason: mockResponseData.applications[8].status_reason,
+            requestReason: null,
+            installed: false,
+            uninstallable: false,
+            uninstallSuccessful: false,
+            uninstallFailed: false,
+            validationError: null,
           },
         },
         environments: [],

spec/lib/gitlab/usage_data_spec.rb

@@ -44,6 +44,7 @@ describe Gitlab::UsageData do
       create(:clusters_applications_ingress, :installed, cluster: gcp_cluster)
       create(:clusters_applications_cert_manager, :installed, cluster: gcp_cluster)
       create(:clusters_applications_prometheus, :installed, cluster: gcp_cluster)
+      create(:clusters_applications_crossplane, :installed, cluster: gcp_cluster)
       create(:clusters_applications_runner, :installed, cluster: gcp_cluster)
       create(:clusters_applications_knative, :installed, cluster: gcp_cluster)
       create(:clusters_applications_elastic_stack, :installed, cluster: gcp_cluster)
@@ -140,6 +141,7 @@ describe Gitlab::UsageData do
         clusters_applications_ingress
         clusters_applications_cert_managers
         clusters_applications_prometheus
+        clusters_applications_crossplane
         clusters_applications_runner
         clusters_applications_knative
         clusters_applications_elastic_stack
@@ -222,6 +224,7 @@ describe Gitlab::UsageData do
       expect(count_data[:clusters_applications_helm]).to eq(1)
       expect(count_data[:clusters_applications_ingress]).to eq(1)
       expect(count_data[:clusters_applications_cert_managers]).to eq(1)
+      expect(count_data[:clusters_applications_crossplane]).to eq(1)
       expect(count_data[:clusters_applications_prometheus]).to eq(1)
       expect(count_data[:clusters_applications_runner]).to eq(1)
       expect(count_data[:clusters_applications_knative]).to eq(1)

spec/models/clusters/applications/crossplane_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Clusters::Applications::Crossplane do
+  let(:crossplane) { create(:clusters_applications_crossplane) }
+
+  include_examples 'cluster application core specs', :clusters_applications_crossplane
+  include_examples 'cluster application status specs', :clusters_applications_crossplane
+  include_examples 'cluster application version specs', :clusters_applications_crossplane
+  include_examples 'cluster application initial status specs'
+
+  describe 'validations' do
+    it { is_expected.to validate_presence_of(:stack) }
+  end
+
+  describe '#can_uninstall?' do
+    subject { crossplane.can_uninstall? }
+
+    it { is_expected.to be_truthy }
+  end
+
+  describe '#install_command' do
+    let(:stack) { 'gcp' }
+
+    subject { crossplane.install_command }
+
+    it { is_expected.to be_an_instance_of(Gitlab::Kubernetes::Helm::InstallCommand) }
+
+    it 'is initialized with crossplane arguments' do
+      expect(subject.name).to eq('crossplane')
+      expect(subject.chart).to eq('crossplane/crossplane')
+      expect(subject.repository).to eq('https://charts.crossplane.io/alpha')
+      expect(subject.version).to eq('0.4.1')
+      expect(subject).to be_rbac
+    end
+
+    context 'application failed to install previously' do
+      let(:crossplane) { create(:clusters_applications_crossplane, :errored, version: '0.0.1') }
+
+      it 'is initialized with the locked version' do
+        expect(subject.version).to eq('0.4.1')
+      end
+    end
+  end
+
+  describe '#files' do
+    let(:application) { crossplane }
+    let(:values) { subject[:'values.yaml'] }
+
+    subject { application.files }
+
+    it 'includes crossplane specific keys in the values.yaml file' do
+      expect(values).to include('clusterStacks')
+    end
+  end
+end

spec/models/clusters/cluster_spec.rb

@@ -515,6 +515,7 @@ describe Clusters::Cluster, :use_clean_rails_memory_store_caching do
       let!(:helm) { create(:clusters_applications_helm, cluster: cluster) }
       let!(:ingress) { create(:clusters_applications_ingress, cluster: cluster) }
       let!(:cert_manager) { create(:clusters_applications_cert_manager, cluster: cluster) }
+      let!(:crossplane) { create(:clusters_applications_crossplane, cluster: cluster) }
       let!(:prometheus) { create(:clusters_applications_prometheus, cluster: cluster) }
       let!(:runner) { create(:clusters_applications_runner, cluster: cluster) }
       let!(:jupyter) { create(:clusters_applications_jupyter, cluster: cluster) }
@@ -522,7 +523,7 @@ describe Clusters::Cluster, :use_clean_rails_memory_store_caching do
       let!(:elastic_stack) { create(:clusters_applications_elastic_stack, cluster: cluster) }
 
       it 'returns a list of created applications' do
-        is_expected.to contain_exactly(helm, ingress, cert_manager, prometheus, runner, jupyter, knative, elastic_stack)
+        is_expected.to contain_exactly(helm, ingress, cert_manager, crossplane, prometheus, runner, jupyter, knative, elastic_stack)
       end
     end
   end