Merge branch '42643-persist-external-ip-of-ingress-controller-gke' into 'master'

app/assets/javascripts/clusters/clusters_bundle.js

@@ -37,10 +37,11 @@ export default class Clusters {
       clusterStatusReason,
       helpPath,
       ingressHelpPath,
+      ingressDnsHelpPath,
     } = document.querySelector('.js-edit-cluster-form').dataset;
 
     this.store = new ClustersStore();
-    this.store.setHelpPaths(helpPath, ingressHelpPath);
+    this.store.setHelpPaths(helpPath, ingressHelpPath, ingressDnsHelpPath);
     this.store.setManagePrometheusPath(managePrometheusPath);
     this.store.updateStatus(clusterStatus);
     this.store.updateStatusReason(clusterStatusReason);
@@ -98,6 +99,7 @@ export default class Clusters {
             helpPath: this.state.helpPath,
             ingressHelpPath: this.state.ingressHelpPath,
             managePrometheusPath: this.state.managePrometheusPath,
+            ingressDnsHelpPath: this.state.ingressDnsHelpPath,
           },
         });
       },

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

@@ -36,10 +36,6 @@
         type: String,
         required: false,
       },
-      description: {
-        type: String,
-        required: true,
-      },
       status: {
         type: String,
         required: false,
@@ -148,7 +144,7 @@
         class="table-section section-wrap"
         role="gridcell"
       >
-        <div v-html="description"></div>
+        <slot name="description"></slot>
       </div>
       <div
         class="table-section table-button-footer section-align-top"

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

@@ -2,10 +2,16 @@
   import _ from 'underscore';
   import { s__, sprintf } from '../../locale';
   import applicationRow from './application_row.vue';
+  import clipboardButton from '../../vue_shared/components/clipboard_button.vue';
+  import {
+    APPLICATION_INSTALLED,
+    INGRESS,
+  } from '../constants';
 
   export default {
     components: {
       applicationRow,
+      clipboardButton,
     },
     props: {
       applications: {
@@ -23,6 +29,11 @@
         required: false,
         default: '',
       },
+      ingressDnsHelpPath: {
+        type: String,
+        required: false,
+        default: '',
+      },
       managePrometheusPath: {
         type: String,
         required: false,
@@ -43,19 +54,16 @@
           false,
         );
       },
-      helmTillerDescription() {
-        return _.escape(s__(
-          `ClusterIntegration|Helm streamlines installing and managing Kubernetes applications.
-          Tiller runs inside of your Kubernetes Cluster, and manages
-          releases of your charts.`,
-        ));
+      ingressId() {
+        return INGRESS;
+      },
+      ingressInstalled() {
+        return this.applications.ingress.status === APPLICATION_INSTALLED;
+      },
+      ingressExternalIp() {
+        return this.applications.ingress.externalIp;
       },
       ingressDescription() {
-        const descriptionParagraph = _.escape(s__(
-          `ClusterIntegration|Ingress gives you a way to route requests to services based on the
-          request host or path, centralizing a number of services into a single entrypoint.`,
-        ));
-
         const extraCostParagraph = sprintf(
           _.escape(s__(
             `ClusterIntegration|%{boldNotice} This will add some extra resources
@@ -84,9 +92,6 @@
 
         return `
           <p>
-            ${descriptionParagraph}
-          </p>
-          <p>
             ${extraCostParagraph}
           </p>
           <p class="settings-message append-bottom-0">
@@ -136,33 +141,121 @@
           id="helm"
           :title="applications.helm.title"
           title-link="https://docs.helm.sh/"
-          :description="helmTillerDescription"
           :status="applications.helm.status"
           :status-reason="applications.helm.statusReason"
           :request-status="applications.helm.requestStatus"
           :request-reason="applications.helm.requestReason"
-        />
+        >
+          <div slot="description">
+            {{ s__(`ClusterIntegration|Helm streamlines installing
+              and managing Kubernetes applications.
+              Tiller runs inside of your Kubernetes Cluster,
+              and manages releases of your charts.`) }}
+          </div>
+        </application-row>
         <application-row
-          id="ingress"
+          :id="ingressId"
           :title="applications.ingress.title"
           title-link="https://kubernetes.io/docs/concepts/services-networking/ingress/"
-          :description="ingressDescription"
           :status="applications.ingress.status"
           :status-reason="applications.ingress.statusReason"
           :request-status="applications.ingress.requestStatus"
           :request-reason="applications.ingress.requestReason"
-        />
+        >
+          <div slot="description">
+            <p>
+              {{ s__(`ClusterIntegration|Ingress gives you a way to route
+                requests to services based on the request host or path,
+                centralizing a number of services into a single entrypoint.`) }}
+            </p>
+
+            <template v-if="ingressInstalled">
+              <div class="form-group">
+                <label for="ingress-ip-address">
+                  {{ s__('ClusterIntegration|Ingress IP Address') }}
+                </label>
+                <div
+                  v-if="ingressExternalIp"
+                  class="input-group"
+                >
+                  <input
+                    type="text"
+                    id="ingress-ip-address"
+                    class="form-control js-ip-address"
+                    :value="ingressExternalIp"
+                    readonly
+                  />
+                  <span class="input-group-btn">
+                    <clipboard-button
+                      :text="ingressExternalIp"
+                      :title="s__('ClusterIntegration|Copy Ingress IP Address to clipboard')"
+                      css-class="btn btn-default js-clipboard-btn"
+                    />
+                  </span>
+                </div>
+                <input
+                  v-else
+                  type="text"
+                  class="form-control js-ip-address"
+                  readonly
+                  value="?"
+                />
+              </div>
+
+              <p
+                v-if="!ingressExternalIp"
+                class="settings-message js-no-ip-message"
+              >
+                {{ s__(`ClusterIntegration|The IP address is in
+                the process of being assigned. Please check your Kubernetes
+                cluster or Quotas on GKE if it takes a long time.`) }}
+
+                <a
+                  :href="ingressHelpPath"
+                  target="_blank"
+                  rel="noopener noreferrer"
+                >
+                  {{ __('More information') }}
+                </a>
+              </p>
+
+              <p>
+                {{ s__(`ClusterIntegration|Point a wildcard DNS to this
+                generated IP address in order to access
+                your application after it has been deployed.`) }}
+                <a
+                  :href="ingressDnsHelpPath"
+                  target="_blank"
+                  rel="noopener noreferrer"
+                >
+                  {{ __('More information') }}
+                </a>
+              </p>
+
+            </template>
+            <div
+              v-else
+              v-html="ingressDescription"
+            >
+            </div>
+          </div>
+        </application-row>
         <application-row
           id="prometheus"
           :title="applications.prometheus.title"
           title-link="https://prometheus.io/docs/introduction/overview/"
           :manage-link="managePrometheusPath"
-          :description="prometheusDescription"
           :status="applications.prometheus.status"
           :status-reason="applications.prometheus.statusReason"
           :request-status="applications.prometheus.requestStatus"
           :request-reason="applications.prometheus.requestReason"
-        />
+        >
+          <div
+            slot="description"
+            v-html="prometheusDescription"
+          >
+          </div>
+        </application-row>
         <!--
           NOTE: Don't forget to update `clusters.scss`
           min-height for this block and uncomment `application_spec` tests

app/assets/javascripts/clusters/constants.js

@@ -10,3 +10,4 @@ export const APPLICATION_ERROR = 'errored';
 export const REQUEST_LOADING = 'request-loading';
 export const REQUEST_SUCCESS = 'request-success';
 export const REQUEST_FAILURE = 'request-failure';
+export const INGRESS = 'ingress';

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

 import { s__ } from '../../locale';
+import { INGRESS } from '../constants';
 
 export default class ClusterStore {
   constructor() {
@@ -21,6 +22,7 @@ export default class ClusterStore {
           statusReason: null,
           requestStatus: null,
           requestReason: null,
+          externalIp: null,
         },
         runner: {
           title: s__('ClusterIntegration|GitLab Runner'),
@@ -40,9 +42,10 @@ export default class ClusterStore {
     };
   }
 
-  setHelpPaths(helpPath, ingressHelpPath) {
+  setHelpPaths(helpPath, ingressHelpPath, ingressDnsHelpPath) {
     this.state.helpPath = helpPath;
     this.state.ingressHelpPath = ingressHelpPath;
+    this.state.ingressDnsHelpPath = ingressDnsHelpPath;
   }
 
   setManagePrometheusPath(managePrometheusPath) {
@@ -64,6 +67,7 @@ export default class ClusterStore {
   updateStateFromServer(serverState = {}) {
     this.state.status = serverState.status;
     this.state.statusReason = serverState.status_reason;
+
     serverState.applications.forEach((serverAppEntry) => {
       const {
         name: appId,
@@ -76,6 +80,10 @@ export default class ClusterStore {
         status,
         statusReason,
       };
+
+      if (appId === INGRESS) {
+        this.state.applications.ingress.externalIp = serverAppEntry.external_ip;
+      }
     });
   }
 }

app/assets/javascripts/vue_shared/components/clipboard_button.vue

@@ -28,6 +28,11 @@
         required: false,
         default: false,
       },
+      cssClass: {
+        type: String,
+        required: false,
+        default: 'btn btn-default btn-transparent btn-clipboard',
+      },
     },
   };
 </script>
@@ -35,7 +40,7 @@
 <template>
   <button
     type="button"
-    class="btn btn-transparent btn-clipboard"
+    :class="cssClass"
     :title="title"
     :data-clipboard-text="text"
     v-tooltip

app/controllers/projects/clusters_controller.rb

@@ -4,6 +4,7 @@ class Projects::ClustersController < Projects::ApplicationController
   before_action :authorize_create_cluster!, only: [:new]
   before_action :authorize_update_cluster!, only: [:update]
   before_action :authorize_admin_cluster!, only: [:destroy]
+  before_action :update_applications_status, only: [:status]
 
   STATUS_POLLING_INTERVAL = 10_000
 
@@ -114,4 +115,8 @@ class Projects::ClustersController < Projects::ApplicationController
   def authorize_admin_cluster!
     access_denied! unless can?(current_user, :admin_cluster, cluster)
   end
+
+  def update_applications_status
+    @cluster.applications.each(&:schedule_status_update)
+  end
 end

app/models/clusters/applications/ingress.rb

@@ -5,6 +5,7 @@ module Clusters
 
       include ::Clusters::Concerns::ApplicationCore
       include ::Clusters::Concerns::ApplicationStatus
+      include AfterCommitQueue
 
       default_value_for :ingress_type, :nginx
       default_value_for :version, :nginx
@@ -13,6 +14,17 @@ module Clusters
         nginx: 1
       }
 
+      FETCH_IP_ADDRESS_DELAY = 30.seconds
+
+      state_machine :status do
+        before_transition any => [:installed] do |application|
+          application.run_after_commit do
+            ClusterWaitForIngressIpAddressWorker.perform_in(
+              FETCH_IP_ADDRESS_DELAY, application.name, application.id)
+          end
+        end
+      end
+
       def chart
         'stable/nginx-ingress'
       end
@@ -24,6 +36,13 @@ module Clusters
       def install_command
         Gitlab::Kubernetes::Helm::InstallCommand.new(name, chart: chart, chart_values_file: chart_values_file)
       end
+
+      def schedule_status_update
+        return unless installed?
+        return if external_ip
+
+        ClusterWaitForIngressIpAddressWorker.perform_async(name, id)
+      end
     end
   end
 end

app/models/clusters/concerns/application_core.rb

@@ -23,6 +23,11 @@ module Clusters
         def name
           self.class.application_name
         end
+
+        def schedule_status_update
+          # Override if you need extra data synchronized
+          # from K8s after installation
+        end
       end
     end
   end

app/serializers/cluster_application_entity.rb

@@ -2,4 +2,5 @@ class ClusterApplicationEntity < Grape::Entity
   expose :name
   expose :status_name, as: :status
   expose :status_reason
+  expose :external_ip, if: -> (e, _) { e.respond_to?(:external_ip) }
 end

app/services/clusters/applications/check_ingress_ip_address_service.rb

+module Clusters
+  module Applications
+    class CheckIngressIpAddressService < BaseHelmService
+      include Gitlab::Utils::StrongMemoize
+
+      Error = Class.new(StandardError)
+
+      LEASE_TIMEOUT = 15.seconds.to_i
+
+      def execute
+        return if app.external_ip
+        return unless try_obtain_lease
+
+        app.update!(external_ip: ingress_ip) if ingress_ip
+      end
+
+      private
+
+      def try_obtain_lease
+        Gitlab::ExclusiveLease
+          .new("check_ingress_ip_address_service:#{app.id}", timeout: LEASE_TIMEOUT)
+          .try_obtain
+      end
+
+      def ingress_ip
+        service.status.loadBalancer.ingress&.first&.ip
+      end
+
+      def service
+        strong_memoize(:ingress_service) do
+          kubeclient.get_service('ingress-nginx-ingress-controller', Gitlab::Kubernetes::Helm::NAMESPACE)
+        end
+      end
+    end
+  end
+end

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

@@ -15,6 +15,7 @@
   cluster_status_reason: @cluster.status_reason,
   help_path: help_page_path('user/project/clusters/index.md', anchor: 'installing-applications'),
   ingress_help_path: help_page_path('user/project/clusters/index.md', anchor: 'getting-the-external-ip-address'),
+  ingress_dns_help_path: help_page_path('topics/autodevops/quick_start_guide.md', anchor: 'point-dns-at-cluster-ip'),
   manage_prometheus_path: edit_project_service_path(@cluster.project, 'prometheus') } }
 
   .js-cluster-application-notice

app/workers/all_queues.yml

@@ -24,6 +24,7 @@
 - gcp_cluster:cluster_wait_for_app_installation
 - gcp_cluster:wait_for_cluster_creation
 - gcp_cluster:check_gcp_project_billing
+- gcp_cluster:cluster_wait_for_ingress_ip_address
 
 - github_import_advance_stage
 - github_importer:github_import_import_diff_note

app/workers/cluster_wait_for_ingress_ip_address_worker.rb

+class ClusterWaitForIngressIpAddressWorker
+  include ApplicationWorker
+  include ClusterQueue
+  include ClusterApplications
+
+  def perform(app_name, app_id)
+    find_application(app_name, app_id) do |app|
+      Clusters::Applications::CheckIngressIpAddressService.new(app).execute
+    end
+  end
+end

changelogs/unreleased/42643-persist-external-ip-of-ingress-controller-gke.yml

+---
+title: Display ingress IP address in the Kubernetes page
+merge_request: 17052
+author:
+type: added

db/migrate/20180212030105_add_external_ip_to_clusters_applications_ingress.rb

+class AddExternalIpToClustersApplicationsIngress < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def change
+    add_column :clusters_applications_ingress, :external_ip, :string
+  end
+end

db/schema.rb

@@ -570,6 +570,7 @@ ActiveRecord::Schema.define(version: 20180301084653) do
     t.string "version", null: false
     t.string "cluster_ip"
     t.text "status_reason"
+    t.string "external_ip"
   end
 
   create_table "clusters_applications_prometheus", force: :cascade do |t|

spec/controllers/projects/clusters_controller_spec.rb

@@ -91,6 +91,12 @@ describe Projects::ClustersController do
         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

spec/features/projects/clusters/applications_spec.rb

@@ -22,7 +22,7 @@ feature 'Clusters Applications', :js do
       scenario 'user is unable to install applications' do
         page.within('.js-cluster-application-row-helm') do
           expect(page.find(:css, '.js-cluster-application-install-button')['disabled']).to eq('true')
-          expect(page.find(:css, '.js-cluster-application-install-button').text).to eq('Install')
+          expect(page).to have_css('.js-cluster-application-install-button', exact_text: 'Install')
         end
       end
     end
@@ -33,13 +33,13 @@ feature 'Clusters Applications', :js do
       scenario 'user can install applications' do
         page.within('.js-cluster-application-row-helm') do
           expect(page.find(:css, '.js-cluster-application-install-button')['disabled']).to be_nil
-          expect(page.find(:css, '.js-cluster-application-install-button')).to have_content('Install')
+          expect(page).to have_css('.js-cluster-application-install-button', exact_text: 'Install')
         end
       end
 
       context 'when user installs Helm' do
         before do
-          allow(ClusterInstallAppWorker).to receive(:perform_async).and_return(nil)
+          allow(ClusterInstallAppWorker).to receive(:perform_async)
 
           page.within('.js-cluster-application-row-helm') do
             page.find(:css, '.js-cluster-application-install-button').click
@@ -50,18 +50,18 @@ feature 'Clusters Applications', :js do
           page.within('.js-cluster-application-row-helm') do
             # FE sends request and gets the response, then the buttons is "Install"
             expect(page.find(:css, '.js-cluster-application-install-button')['disabled']).to eq('true')
-            expect(page.find(:css, '.js-cluster-application-install-button')).to have_content('Install')
+            expect(page).to have_css('.js-cluster-application-install-button', exact_text: 'Install')
 
             Clusters::Cluster.last.application_helm.make_installing!
 
             # FE starts polling and update the buttons to "Installing"
             expect(page.find(:css, '.js-cluster-application-install-button')['disabled']).to eq('true')
-            expect(page.find(:css, '.js-cluster-application-install-button')).to have_content('Installing')
+            expect(page).to have_css('.js-cluster-application-install-button', exact_text: 'Installing')
 
             Clusters::Cluster.last.application_helm.make_installed!
 
             expect(page.find(:css, '.js-cluster-application-install-button')['disabled']).to eq('true')
-            expect(page.find(:css, '.js-cluster-application-install-button')).to have_content('Installed')
+            expect(page).to have_css('.js-cluster-application-install-button', exact_text: 'Installed')
           end
 
           expect(page).to have_content('Helm Tiller was successfully installed on your Kubernetes cluster')
@@ -71,11 +71,14 @@ feature 'Clusters Applications', :js do
       context 'when user installs Ingress' do
         context 'when user installs application: Ingress' do
           before do
-            allow(ClusterInstallAppWorker).to receive(:perform_async).and_return(nil)
+            allow(ClusterInstallAppWorker).to receive(:perform_async)
+            allow(ClusterWaitForIngressIpAddressWorker).to receive(:perform_in)
+            allow(ClusterWaitForIngressIpAddressWorker).to receive(:perform_async)
 
             create(:clusters_applications_helm, :installed, cluster: cluster)
 
             page.within('.js-cluster-application-row-ingress') do
+              expect(page).to have_css('.js-cluster-application-install-button:not([disabled])')
               page.find(:css, '.js-cluster-application-install-button').click
             end
           end
@@ -83,19 +86,28 @@ feature 'Clusters Applications', :js do
           it 'he sees status transition' do
             page.within('.js-cluster-application-row-ingress') do
               # FE sends request and gets the response, then the buttons is "Install"
-              expect(page.find(:css, '.js-cluster-application-install-button')['disabled']).to eq('true')
-              expect(page.find(:css, '.js-cluster-application-install-button')).to have_content('Install')
+              expect(page).to have_css('.js-cluster-application-install-button[disabled]')
+              expect(page).to have_css('.js-cluster-application-install-button', exact_text: 'Install')
 
               Clusters::Cluster.last.application_ingress.make_installing!
 
               # FE starts polling and update the buttons to "Installing"
-              expect(page.find(:css, '.js-cluster-application-install-button')['disabled']).to eq('true')
-              expect(page.find(:css, '.js-cluster-application-install-button')).to have_content('Installing')
+              expect(page).to have_css('.js-cluster-application-install-button', exact_text: 'Installing')
+              expect(page).to have_css('.js-cluster-application-install-button[disabled]')
 
+              # The application becomes installed but we keep waiting for external IP address
               Clusters::Cluster.last.application_ingress.make_installed!
 
-              expect(page.find(:css, '.js-cluster-application-install-button')['disabled']).to eq('true')
-              expect(page.find(:css, '.js-cluster-application-install-button')).to have_content('Installed')
+              expect(page).to have_css('.js-cluster-application-install-button', exact_text: 'Installed')
+              expect(page).to have_css('.js-cluster-application-install-button[disabled]')
+              expect(page).to have_selector('.js-no-ip-message')
+              expect(page.find('.js-ip-address').value).to eq('?')
+
+              # We receive the external IP address and display
+              Clusters::Cluster.last.application_ingress.update!(external_ip: '192.168.1.100')
+
+              expect(page).not_to have_selector('.js-no-ip-message')
+              expect(page.find('.js-ip-address').value).to eq('192.168.1.100')
             end
 
             expect(page).to have_content('Ingress was successfully installed on your Kubernetes cluster')

spec/fixtures/api/schemas/cluster_status.json

@@ -30,7 +30,8 @@
             ]
           }
         },
-        "status_reason": { "type": ["string", "null"] }
+        "status_reason": { "type": ["string", "null"] },
+        "external_ip": { "type": ["string", "null"] }
       },
       "required" : [ "name", "status" ]
     }

spec/javascripts/clusters/components/applications_spec.js

@@ -44,4 +44,71 @@ describe('Applications', () => {
     });
     /* */
   });
+
+  describe('Ingress application', () => {
+    describe('when installed', () => {
+      describe('with ip address', () => {
+        it('renders ip address with a clipboard button', () => {
+          vm = mountComponent(Applications, {
+            applications: {
+              ingress: {
+                title: 'Ingress',
+                status: 'installed',
+                externalIp: '0.0.0.0',
+              },
+              helm: { title: 'Helm Tiller' },
+              runner: { title: 'GitLab Runner' },
+              prometheus: { title: 'Prometheus' },
+            },
+          });
+
+          expect(
+            vm.$el.querySelector('.js-ip-address').value,
+          ).toEqual('0.0.0.0');
+
+          expect(
+            vm.$el.querySelector('.js-clipboard-btn').getAttribute('data-clipboard-text'),
+          ).toEqual('0.0.0.0');
+        });
+      });
+
+      describe('without ip address', () => {
+        it('renders an input text with a question mark and an alert text', () => {
+          vm = mountComponent(Applications, {
+            applications: {
+              ingress: {
+                title: 'Ingress',
+                status: 'installed',
+              },
+              helm: { title: 'Helm Tiller' },
+              runner: { title: 'GitLab Runner' },
+              prometheus: { title: 'Prometheus' },
+            },
+          });
+
+          expect(
+            vm.$el.querySelector('.js-ip-address').value,
+          ).toEqual('?');
+
+          expect(vm.$el.querySelector('.js-no-ip-message')).not.toBe(null);
+        });
+      });
+    });
+
+    describe('before installing', () => {
+      it('does not render the IP address', () => {
+        vm = mountComponent(Applications, {
+          applications: {
+            helm: { title: 'Helm Tiller' },
+            ingress: { title: 'Ingress' },
+            runner: { title: 'GitLab Runner' },
+            prometheus: { title: 'Prometheus' },
+          },
+        });
+
+        expect(vm.$el.textContent).not.toContain('Ingress IP Address');
+        expect(vm.$el.querySelector('.js-ip-address')).toBe(null);
+      });
+    });
+  });
 });

spec/javascripts/clusters/services/mock_data.js

@@ -18,6 +18,7 @@ const CLUSTERS_MOCK_DATA = {
           name: 'ingress',
           status: APPLICATION_ERROR,
           status_reason: 'Cannot connect',
+          external_ip: null,
         }, {
           name: 'runner',
           status: APPLICATION_INSTALLING,

spec/javascripts/clusters/stores/clusters_store_spec.js

@@ -75,6 +75,7 @@ describe('Clusters Store', () => {
             statusReason: mockResponseData.applications[1].status_reason,
             requestStatus: null,
             requestReason: null,
+            externalIp: null,
           },
           runner: {
             title: 'GitLab Runner',

spec/models/clusters/applications/ingress_spec.rb

@@ -4,5 +4,52 @@ describe Clusters::Applications::Ingress do
   it { is_expected.to belong_to(:cluster) }
   it { is_expected.to validate_presence_of(:cluster) }
 
+  before do
+    allow(ClusterWaitForIngressIpAddressWorker).to receive(:perform_in)
+    allow(ClusterWaitForIngressIpAddressWorker).to receive(:perform_async)
+  end
+
   include_examples 'cluster application specs', described_class
+
+  describe '#make_installed!' do
+    before do
+      application.make_installed!
+    end
+
+    let(:application) { create(:clusters_applications_ingress, :installing) }
+
+    it 'schedules a ClusterWaitForIngressIpAddressWorker' do
+      expect(ClusterWaitForIngressIpAddressWorker).to have_received(:perform_in)
+        .with(Clusters::Applications::Ingress::FETCH_IP_ADDRESS_DELAY, 'ingress', application.id)
+    end
+  end
+
+  describe '#schedule_status_update' do
+    let(:application) { create(:clusters_applications_ingress, :installed) }
+
+    before do
+      application.schedule_status_update
+    end
+
+    it 'schedules a ClusterWaitForIngressIpAddressWorker' do
+      expect(ClusterWaitForIngressIpAddressWorker).to have_received(:perform_async)
+        .with('ingress', application.id)
+    end
+
+    context 'when the application is not installed' do
+      let(:application) { create(:clusters_applications_ingress, :installing) }
+
+      it 'does not schedule a ClusterWaitForIngressIpAddressWorker' do
+        expect(ClusterWaitForIngressIpAddressWorker).not_to have_received(:perform_async)
+      end
+    end
+
+    context 'when there is already an external_ip' do
+      let(:application) { create(:clusters_applications_ingress, :installed, external_ip: '111.222.222.111') }
+
+      it 'does not schedule a ClusterWaitForIngressIpAddressWorker' do
+        expect(ClusterWaitForIngressIpAddressWorker).not_to have_received(:perform_in)
+      end
+    end
+  end
 end

spec/serializers/cluster_application_entity_spec.rb

@@ -26,5 +26,19 @@ describe ClusterApplicationEntity do
         expect(subject[:status_reason]).to eq(application.status_reason)
       end
     end
+
+    context 'for ingress application' do
+      let(:application) do
+        build(
+          :clusters_applications_ingress,
+          :installed,
+          external_ip: '111.222.111.222'
+        )
+      end
+
+      it 'includes external_ip' do
+        expect(subject[:external_ip]).to eq('111.222.111.222')
+      end
+    end
   end
 end

spec/services/clusters/applications/check_ingress_ip_address_service_spec.rb

+require 'spec_helper'
+
+describe Clusters::Applications::CheckIngressIpAddressService do
+  let(:application) { create(:clusters_applications_ingress, :installed) }
+  let(:service) { described_class.new(application) }
+  let(:kubeclient) { double(::Kubeclient::Client, get_service: kube_service) }
+  let(:ingress) { [{ ip: '111.222.111.222' }] }
+  let(:exclusive_lease) { instance_double(Gitlab::ExclusiveLease, try_obtain: true) }
+
+  let(:kube_service) do
+    ::Kubeclient::Resource.new(
+      {
+          status: {
+              loadBalancer: {
+                  ingress: ingress
+              }
+          }
+      }
+    )
+  end
+
+  subject { service.execute }
+
+  before do
+    allow(application.cluster).to receive(:kubeclient).and_return(kubeclient)
+    allow(Gitlab::ExclusiveLease)
+      .to receive(:new)
+      .with("check_ingress_ip_address_service:#{application.id}", timeout: 15.seconds.to_i)
+      .and_return(exclusive_lease)
+  end
+
+  describe '#execute' do
+    context 'when the ingress ip address is available' do
+      it 'updates the external_ip for the app' do
+        subject
+
+        expect(application.external_ip).to eq('111.222.111.222')
+      end
+    end
+
+    context 'when the ingress ip address is not available' do
+      let(:ingress) { nil }
+
+      it 'does not error' do
+        subject
+      end
+    end
+
+    context 'when the exclusive lease cannot be obtained' do
+      before do
+        allow(exclusive_lease)
+          .to receive(:try_obtain)
+          .and_return(false)
+      end
+
+      it 'does not call kubeclient' do
+        subject
+
+        expect(kubeclient).not_to have_received(:get_service)
+      end
+    end
+
+    context 'when there is already an external_ip' do
+      let(:application) { create(:clusters_applications_ingress, :installed, external_ip: '001.111.002.111') }
+
+      it 'does not call kubeclient' do
+        subject
+
+        expect(kubeclient).not_to have_received(:get_service)
+      end
+    end
+  end
+end

spec/workers/cluster_wait_for_ingress_ip_address_worker_spec.rb

+require 'spec_helper'
+
+describe ClusterWaitForIngressIpAddressWorker do
+  describe '#perform' do
+    let(:service) { instance_double(Clusters::Applications::CheckIngressIpAddressService, execute: true) }
+    let(:application) { instance_double(Clusters::Applications::Ingress) }
+    let(:worker) { described_class.new }
+
+    before do
+      allow(worker)
+        .to receive(:find_application)
+        .with('ingress', 117)
+        .and_yield(application)
+
+      allow(Clusters::Applications::CheckIngressIpAddressService)
+        .to receive(:new)
+        .with(application)
+        .and_return(service)
+
+      allow(described_class)
+        .to receive(:perform_in)
+    end
+
+    it 'finds the application and calls CheckIngressIpAddressService#execute' do
+      worker.perform('ingress', 117)
+
+      expect(service).to have_received(:execute)
+    end
+  end
+end