Extend Cluster Applications to allow installation of Prometheus

39 files changed, 805 insertions, 327 deletions

diff --git a/app/assets/javascripts/clusters/clusters_bundle.js b/app/assets/javascripts/clusters/clusters_bundle.js
index 2cfd6179a25..637d0dbde23 100644
--- a/app/assets/javascripts/clusters/clusters_bundle.js
+++ b/app/assets/javascripts/clusters/clusters_bundle.js
@@ -30,6 +30,7 @@ export default class Clusters {
       installHelmPath,
       installIngressPath,
       installRunnerPath,
+      installPrometheusPath,
       clusterStatus,
       clusterStatusReason,
       helpPath,
@@ -44,6 +45,7 @@ export default class Clusters {
       installHelmEndpoint: installHelmPath,
       installIngressEndpoint: installIngressPath,
       installRunnerEndpoint: installRunnerPath,
+      installPrometheusEndpoint: installPrometheusPath,
     });
 
     this.toggle = this.toggle.bind(this);
diff --git a/app/assets/javascripts/clusters/components/applications.vue b/app/assets/javascripts/clusters/components/applications.vue
index e5ae439d26e..cd58b88db69 100644
--- a/app/assets/javascripts/clusters/components/applications.vue
+++ b/app/assets/javascripts/clusters/components/applications.vue
@@ -67,6 +67,16 @@ export default {
         and send the results back to GitLab.`,
       ));
     },
+    prometheusDescription() {
+      return sprintf(
+        _.escape(s__('ClusterIntegration|Prometheus is an open-source monitoring system with %{gitlabIntegrationLink} to monitor deployed applications.')), {
+          gitlabIntegrationLink: `<a href="https://docs.gitlab.com/ce/user/project/integrations/prometheus.html", target="_blank" rel="noopener noreferrer">
+            ${_.escape(s__('ClusterIntegration|Gitlab Integration'))}
+          </a>`,
+        },
+        false,
+      );
+    },
   },
 };
 </script>
@@ -106,6 +116,16 @@ export default {
          :request-status="applications.ingress.requestStatus"
          :request-reason="applications.ingress.requestReason"
        />
+       <application-row
+         id="prometheus"
+         :title="applications.prometheus.title"
+         title-link="https://prometheus.io/docs/introduction/overview/"
+         :description="prometheusDescription"
+         :status="applications.prometheus.status"
+         :status-reason="applications.prometheus.statusReason"
+         :request-status="applications.prometheus.requestStatus"
+         :request-reason="applications.prometheus.requestReason"
+       />
         <!-- NOTE: Don't forget to update `clusters.scss` min-height for this block and uncomment `application_spec` tests -->
         <!-- Add GitLab Runner row, all other plumbing is complete -->
       </div>
diff --git a/app/assets/javascripts/clusters/services/clusters_service.js b/app/assets/javascripts/clusters/services/clusters_service.js
index 755c2981c2e..13468578f4f 100644
--- a/app/assets/javascripts/clusters/services/clusters_service.js
+++ b/app/assets/javascripts/clusters/services/clusters_service.js
@@ -7,6 +7,7 @@ export default class ClusterService {
       helm: this.options.installHelmEndpoint,
       ingress: this.options.installIngressEndpoint,
       runner: this.options.installRunnerEndpoint,
+      prometheus: this.options.installPrometheusEndpoint,
     };
   }
 
diff --git a/app/assets/javascripts/clusters/stores/clusters_store.js b/app/assets/javascripts/clusters/stores/clusters_store.js
index e731cdc3042..bd4a1fb37f9 100644
--- a/app/assets/javascripts/clusters/stores/clusters_store.js
+++ b/app/assets/javascripts/clusters/stores/clusters_store.js
@@ -28,6 +28,13 @@ export default class ClusterStore {
           requestStatus: null,
           requestReason: null,
         },
+        prometheus: {
+          title: s__('ClusterIntegration|Prometheus'),
+          status: null,
+          statusReason: null,
+          requestStatus: null,
+          requestReason: null,
+        },
       },
     };
   }
diff --git a/app/assets/stylesheets/pages/clusters.scss b/app/assets/stylesheets/pages/clusters.scss
index 88d44131d5b..7b8ee026357 100644
--- a/app/assets/stylesheets/pages/clusters.scss
+++ b/app/assets/stylesheets/pages/clusters.scss
@@ -6,7 +6,7 @@
 
 .cluster-applications-table {
   // Wait for the Vue to kick-in and render the applications block
-  min-height: 302px;
+  min-height: 400px;
 }
 
 .clusters-dropdown-menu {
diff --git a/app/models/clusters/applications/helm.rb b/app/models/clusters/applications/helm.rb
index c7949d11ef8..193bb48e54d 100644
--- a/app/models/clusters/applications/helm.rb
+++ b/app/models/clusters/applications/helm.rb
@@ -3,32 +3,19 @@ module Clusters
     class Helm < ActiveRecord::Base
       self.table_name = 'clusters_applications_helm'
 
+      include ::Clusters::Concerns::ApplicationCore
       include ::Clusters::Concerns::ApplicationStatus
 
-      belongs_to :cluster, class_name: 'Clusters::Cluster', foreign_key: :cluster_id
-
       default_value_for :version, Gitlab::Kubernetes::Helm::HELM_VERSION
 
-      validates :cluster, presence: true
-
-      after_initialize :set_initial_status
-
-      def self.application_name
-        self.to_s.demodulize.underscore
-      end
-
       def set_initial_status
         return unless not_installable?
 
         self.status = 'installable' if cluster&.platform_kubernetes_active?
       end
 
-      def name
-        self.class.application_name
-      end
-
       def install_command
-        Gitlab::Kubernetes::Helm::InstallCommand.new(name, true)
+        Gitlab::Kubernetes::Helm::InstallCommand.new(name, install_helm: true)
       end
     end
   end
diff --git a/app/models/clusters/applications/ingress.rb b/app/models/clusters/applications/ingress.rb
index 44bd979741e..9024f1df1cd 100644
--- a/app/models/clusters/applications/ingress.rb
+++ b/app/models/clusters/applications/ingress.rb
@@ -3,41 +3,22 @@ module Clusters
     class Ingress < ActiveRecord::Base
       self.table_name = 'clusters_applications_ingress'
 
+      include ::Clusters::Concerns::ApplicationCore
       include ::Clusters::Concerns::ApplicationStatus
 
-      belongs_to :cluster, class_name: 'Clusters::Cluster', foreign_key: :cluster_id
-
-      validates :cluster, presence: true
-
       default_value_for :ingress_type, :nginx
       default_value_for :version, :nginx
 
-      after_initialize :set_initial_status
-
       enum ingress_type: {
         nginx: 1
       }
 
-      def self.application_name
-        self.to_s.demodulize.underscore
-      end
-
-      def set_initial_status
-        return unless not_installable?
-
-        self.status = 'installable' if cluster&.application_helm_installed?
-      end
-
-      def name
-        self.class.application_name
-      end
-
       def chart
         'stable/nginx-ingress'
       end
 
       def install_command
-        Gitlab::Kubernetes::Helm::InstallCommand.new(name, false, chart)
+        Gitlab::Kubernetes::Helm::InstallCommand.new(name, chart: chart)
       end
     end
   end
diff --git a/app/models/clusters/applications/prometheus.rb b/app/models/clusters/applications/prometheus.rb
new file mode 100644
index 00000000000..9b0787ee6ca
--- /dev/null
+++ b/app/models/clusters/applications/prometheus.rb
@@ -0,0 +1,26 @@
+module Clusters
+  module Applications
+    class Prometheus < ActiveRecord::Base
+      VERSION = "2.0.0".freeze
+
+      self.table_name = 'clusters_applications_prometheus'
+
+      include ::Clusters::Concerns::ApplicationCore
+      include ::Clusters::Concerns::ApplicationStatus
+
+      default_value_for :version, VERSION
+
+      def chart
+        'stable/prometheus'
+      end
+
+      def chart_values_file
+        "#{Rails.root}/vendor/#{name}/values.yaml"
+      end
+
+      def install_command
+        Gitlab::Kubernetes::Helm::InstallCommand.new(name, chart: chart, chart_values_file: chart_values_file)
+      end
+    end
+  end
+end
diff --git a/app/models/clusters/cluster.rb b/app/models/clusters/cluster.rb
index 55419189282..5ecbd4cbceb 100644
--- a/app/models/clusters/cluster.rb
+++ b/app/models/clusters/cluster.rb
@@ -6,7 +6,8 @@ module Clusters
 
     APPLICATIONS = {
       Applications::Helm.application_name => Applications::Helm,
-      Applications::Ingress.application_name => Applications::Ingress
+      Applications::Ingress.application_name => Applications::Ingress,
+      Applications::Prometheus.application_name => Applications::Prometheus
     }.freeze
 
     belongs_to :user
@@ -21,6 +22,7 @@ module Clusters
 
     has_one :application_helm, class_name: 'Clusters::Applications::Helm'
     has_one :application_ingress, class_name: 'Clusters::Applications::Ingress'
+    has_one :application_prometheus, class_name: 'Clusters::Applications::Prometheus'
 
     accepts_nested_attributes_for :provider_gcp, update_only: true
     accepts_nested_attributes_for :platform_kubernetes, update_only: true
@@ -62,7 +64,8 @@ module Clusters
     def applications
       [
         application_helm || build_application_helm,
-        application_ingress || build_application_ingress
+        application_ingress || build_application_ingress,
+        application_prometheus || build_application_prometheus
       ]
     end
 
diff --git a/app/models/clusters/concerns/application_core.rb b/app/models/clusters/concerns/application_core.rb
new file mode 100644
index 00000000000..a98fa85a5ff
--- /dev/null
+++ b/app/models/clusters/concerns/application_core.rb
@@ -0,0 +1,29 @@
+module Clusters
+  module Concerns
+    module ApplicationCore
+      extend ActiveSupport::Concern
+
+      included do
+        belongs_to :cluster, class_name: 'Clusters::Cluster', foreign_key: :cluster_id
+
+        validates :cluster, presence: true
+
+        after_initialize :set_initial_status
+
+        def set_initial_status
+          return unless not_installable?
+
+          self.status = 'installable' if cluster&.application_helm_installed?
+        end
+
+        def self.application_name
+          self.to_s.demodulize.underscore
+        end
+
+        def name
+          self.class.application_name
+        end
+      end
+    end
+  end
+end
diff --git a/app/services/clusters/applications/base_helm_service.rb b/app/services/clusters/applications/base_helm_service.rb
index 9a4ce31cb39..cba1b920f7c 100644
--- a/app/services/clusters/applications/base_helm_service.rb
+++ b/app/services/clusters/applications/base_helm_service.rb
@@ -18,7 +18,7 @@ module Clusters
       end
 
       def helm_api
-        @helm_api ||= Gitlab::Kubernetes::Helm.new(kubeclient)
+        @helm_api ||= Gitlab::Kubernetes::Helm::Api.new(kubeclient)
       end
 
       def install_command
diff --git a/app/views/projects/clusters/show.html.haml b/app/views/projects/clusters/show.html.haml
index fe6dacf1f0d..0115c64c076 100644
--- a/app/views/projects/clusters/show.html.haml
+++ b/app/views/projects/clusters/show.html.haml
@@ -9,6 +9,7 @@
 .edit-cluster-form.js-edit-cluster-form{ data: { status_path: status_path,
   install_helm_path: install_applications_namespace_project_cluster_path(@cluster.project.namespace, @cluster.project, @cluster, :helm),
   install_ingress_path: install_applications_namespace_project_cluster_path(@cluster.project.namespace, @cluster.project, @cluster, :ingress),
+  install_prometheus_path: install_applications_namespace_project_cluster_path(@cluster.project.namespace, @cluster.project, @cluster, :prometheus),
   toggle_status: @cluster.enabled? ? 'true': 'false',
   cluster_status: @cluster.status_name,
   cluster_status_reason: @cluster.status_reason,
diff --git a/changelogs/unreleased/41053-extend-cluster-applications-to-allow-install-to-prometheus.yml b/changelogs/unreleased/41053-extend-cluster-applications-to-allow-install-to-prometheus.yml
new file mode 100644
index 00000000000..ffb79d7d79f
--- /dev/null
+++ b/changelogs/unreleased/41053-extend-cluster-applications-to-allow-install-to-prometheus.yml
@@ -0,0 +1,5 @@
+---
+title: Add Prometheus to available Cluster applications
+merge_request: 15895
+author:
+type: added
diff --git a/db/migrate/20171212203433_create_clusters_applications_prometheus.rb b/db/migrate/20171212203433_create_clusters_applications_prometheus.rb
new file mode 100644
index 00000000000..dc2531d2691
--- /dev/null
+++ b/db/migrate/20171212203433_create_clusters_applications_prometheus.rb
@@ -0,0 +1,18 @@
+class CreateClustersApplicationsPrometheus < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def change
+    create_table :clusters_applications_prometheus do |t|
+      t.references :cluster, null: false, unique: true, foreign_key: { on_delete: :cascade }
+
+      t.integer :status, null: false
+      t.string :version, null: false
+
+      t.text :status_reason
+
+      t.timestamps_with_timezone null: false
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 81b594cd0c1..aa5db5da4f0 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -568,6 +568,15 @@ ActiveRecord::Schema.define(version: 20171220191323) do
     t.text "status_reason"
   end
 
+  create_table "clusters_applications_prometheus", force: :cascade do |t|
+    t.integer "cluster_id", null: false
+    t.integer "status", null: false
+    t.string "version", null: false
+    t.text "status_reason"
+    t.datetime_with_timezone "created_at", null: false
+    t.datetime_with_timezone "updated_at", null: false
+  end
+
   create_table "container_repositories", force: :cascade do |t|
     t.integer "project_id", null: false
     t.string "name", null: false
diff --git a/lib/gitlab/kubernetes/helm.rb b/lib/gitlab/kubernetes/helm.rb
index 407cdefc04d..0f0588b8b23 100644
--- a/lib/gitlab/kubernetes/helm.rb
+++ b/lib/gitlab/kubernetes/helm.rb
@@ -1,96 +1,8 @@
 module Gitlab
   module Kubernetes
-    class Helm
+    module Helm
       HELM_VERSION = '2.7.0'.freeze
       NAMESPACE = 'gitlab-managed-apps'.freeze
-      INSTALL_DEPS = <<-EOS.freeze
-        set -eo pipefail
-        apk add -U ca-certificates openssl >/dev/null
-        wget -q -O - https://kubernetes-helm.storage.googleapis.com/helm-v${HELM_VERSION}-linux-amd64.tar.gz | tar zxC /tmp >/dev/null
-        mv /tmp/linux-amd64/helm /usr/bin/
-      EOS
-
-      InstallCommand = Struct.new(:name, :install_helm, :chart) do
-        def pod_name
-          "install-#{name}"
-        end
-      end
-
-      def initialize(kubeclient)
-        @kubeclient = kubeclient
-        @namespace = Gitlab::Kubernetes::Namespace.new(NAMESPACE, kubeclient)
-      end
-
-      def install(command)
-        @namespace.ensure_exists!
-        @kubeclient.create_pod(pod_resource(command))
-      end
-
-      ##
-      # Returns Pod phase
-      #
-      # https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle/#pod-phase
-      #
-      # values: "Pending", "Running", "Succeeded", "Failed", "Unknown"
-      #
-      def installation_status(pod_name)
-        @kubeclient.get_pod(pod_name, @namespace.name).status.phase
-      end
-
-      def installation_log(pod_name)
-        @kubeclient.get_pod_log(pod_name, @namespace.name).body
-      end
-
-      def delete_installation_pod!(pod_name)
-        @kubeclient.delete_pod(pod_name, @namespace.name)
-      end
-
-      private
-
-      def pod_resource(command)
-        labels = { 'gitlab.org/action': 'install', 'gitlab.org/application': command.name }
-        metadata = { name: command.pod_name, namespace: @namespace.name, labels: labels }
-        container = {
-          name: 'helm',
-          image: 'alpine:3.6',
-          env: generate_pod_env(command),
-          command: %w(/bin/sh),
-          args: %w(-c $(COMMAND_SCRIPT))
-        }
-        spec = { containers: [container], restartPolicy: 'Never' }
-
-        ::Kubeclient::Resource.new(metadata: metadata, spec: spec)
-      end
-
-      def generate_pod_env(command)
-        {
-          HELM_VERSION: HELM_VERSION,
-          TILLER_NAMESPACE: @namespace.name,
-          COMMAND_SCRIPT: generate_script(command)
-        }.map { |key, value| { name: key, value: value } }
-      end
-
-      def generate_script(command)
-        [
-            INSTALL_DEPS,
-            helm_init_command(command),
-            helm_install_command(command)
-        ].join("\n")
-      end
-
-      def helm_init_command(command)
-        if command.install_helm
-          'helm init >/dev/null'
-        else
-          'helm init --client-only >/dev/null'
-        end
-      end
-
-      def helm_install_command(command)
-        return if command.chart.nil?
-
-        "helm install #{command.chart} --name #{command.name} --namespace #{@namespace.name} >/dev/null"
-      end
     end
   end
 end
diff --git a/lib/gitlab/kubernetes/helm/api.rb b/lib/gitlab/kubernetes/helm/api.rb
new file mode 100644
index 00000000000..ebd7dc1b100
--- /dev/null
+++ b/lib/gitlab/kubernetes/helm/api.rb
@@ -0,0 +1,42 @@
+module Gitlab
+  module Kubernetes
+    module Helm
+      class Api
+        def initialize(kubeclient)
+          @kubeclient = kubeclient
+          @namespace = Gitlab::Kubernetes::Namespace.new(Gitlab::Kubernetes::Helm::NAMESPACE, kubeclient)
+        end
+
+        def install(command)
+          @namespace.ensure_exists!
+          @kubeclient.create_pod(pod_resource(command))
+        end
+
+        ##
+        # Returns Pod phase
+        #
+        # https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle/#pod-phase
+        #
+        # values: "Pending", "Running", "Succeeded", "Failed", "Unknown"
+        #
+        def installation_status(pod_name)
+          @kubeclient.get_pod(pod_name, @namespace.name).status.phase
+        end
+
+        def installation_log(pod_name)
+          @kubeclient.get_pod_log(pod_name, @namespace.name).body
+        end
+
+        def delete_installation_pod!(pod_name)
+          @kubeclient.delete_pod(pod_name, @namespace.name)
+        end
+
+        private
+
+        def pod_resource(command)
+          Pod.new(command, @namespace.name, @kubeclient).generate
+        end
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/kubernetes/helm/install_command.rb b/lib/gitlab/kubernetes/helm/install_command.rb
new file mode 100644
index 00000000000..8d8c441a4b1
--- /dev/null
+++ b/lib/gitlab/kubernetes/helm/install_command.rb
@@ -0,0 +1,53 @@
+module Gitlab
+  module Kubernetes
+    module Helm
+      class InstallCommand
+        attr_reader :name, :install_helm, :chart, :chart_values_file
+
+        def initialize(name, install_helm: false, chart: false, chart_values_file: false)
+          @name = name
+          @install_helm = install_helm
+          @chart = chart
+          @chart_values_file = chart_values_file
+        end
+
+        def pod_name
+          "install-#{name}"
+        end
+
+        def generate_script(namespace_name)
+          [
+            install_dps_command,
+            init_command,
+            complete_command(namespace_name)
+          ].join("\n")
+        end
+
+        private
+
+        def init_command
+          if install_helm
+            'helm init >/dev/null'
+          else
+            'helm init --client-only >/dev/null'
+          end
+        end
+
+        def complete_command(namespace_name)
+          return unless chart
+
+          "helm install #{chart} --name #{name} --namespace #{namespace_name} >/dev/null"
+        end
+
+        def install_dps_command
+          <<~HEREDOC
+            set -eo pipefail
+            apk add -U ca-certificates openssl >/dev/null
+            wget -q -O - https://kubernetes-helm.storage.googleapis.com/helm-v#{Gitlab::Kubernetes::Helm::HELM_VERSION}-linux-amd64.tar.gz | tar zxC /tmp >/dev/null
+            mv /tmp/linux-amd64/helm /usr/bin/
+          HEREDOC
+        end
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/kubernetes/helm/pod.rb b/lib/gitlab/kubernetes/helm/pod.rb
new file mode 100644
index 00000000000..233f6bf6227
--- /dev/null
+++ b/lib/gitlab/kubernetes/helm/pod.rb
@@ -0,0 +1,69 @@
+module Gitlab
+  module Kubernetes
+    module Helm
+      class Pod
+        def initialize(command, namespace_name, kubeclient)
+          @command = command
+          @namespace_name = namespace_name
+          @kubeclient = kubeclient
+        end
+
+        def generate
+          spec = { containers: [container_specification], restartPolicy: 'Never' }
+          if command.chart_values_file
+            generate_config_map
+            spec['volumes'] = volumes_specification
+          end
+          ::Kubeclient::Resource.new(metadata: metadata, spec: spec)
+        end
+
+        private
+
+        attr_reader :command, :namespace_name, :kubeclient
+
+        def container_specification
+          container = {
+            name: 'helm',
+            image: 'alpine:3.6',
+            env: generate_pod_env(command),
+            command: %w(/bin/sh),
+            args: %w(-c $(COMMAND_SCRIPT))
+          }
+          container[:volumeMounts] = volume_mounts_specification if command.chart_values_file
+          container
+        end
+
+        def labels
+          { 'gitlab.org/action': 'install', 'gitlab.org/application': command.name }
+        end
+
+        def metadata
+          { name: command.pod_name, namespace: namespace_name, labels: labels }
+        end
+
+        def volume_mounts_specification
+          [{ name: 'config-volume', mountPath: '/etc/config' }]
+        end
+
+        def volumes_specification
+          [{ name: 'config-volume', configMap: { name: 'values-config' } }]
+        end
+
+        def generate_pod_env(command)
+          {
+            HELM_VERSION: Gitlab::Kubernetes::Helm::HELM_VERSION,
+            TILLER_NAMESPACE: namespace_name,
+            COMMAND_SCRIPT: command.generate_script(namespace_name)
+          }.map { |key, value| { name: key, value: value } }
+        end
+
+        def generate_config_map
+          resource = ::Kubeclient::Resource.new
+          resource.metadata = { name: 'values-config', namespace: namespace_name }
+          resource.data = YAML.load_file(command.chart_values_file)
+          kubeclient.create_config_map(resource)
+        end
+      end
+    end
+  end
+end
diff --git a/spec/controllers/projects/clusters/applications_controller_spec.rb b/spec/controllers/projects/clusters/applications_controller_spec.rb
index 8b460646059..99fdff5f846 100644
--- a/spec/controllers/projects/clusters/applications_controller_spec.rb
+++ b/spec/controllers/projects/clusters/applications_controller_spec.rb
@@ -52,7 +52,7 @@ describe Projects::Clusters::ApplicationsController do
 
       context 'when application is already installing' do
         before do
-          create(:cluster_applications_helm, :installing, cluster: cluster)
+          create(:clusters_applications_helm, :installing, cluster: cluster)
         end
 
         it 'returns 400' do
diff --git a/spec/factories/clusters/applications/helm.rb b/spec/factories/clusters/applications/helm.rb
index d82fa8e34aa..775fbb3d27b 100644
--- a/spec/factories/clusters/applications/helm.rb
+++ b/spec/factories/clusters/applications/helm.rb
@@ -1,5 +1,5 @@
 FactoryBot.define do
-  factory :cluster_applications_helm, class: Clusters::Applications::Helm do
+  factory :clusters_applications_helm, class: Clusters::Applications::Helm do
     cluster factory: %i(cluster provided_by_gcp)
 
     trait :not_installable do
@@ -31,5 +31,8 @@ FactoryBot.define do
       installing
       updated_at ClusterWaitForAppInstallationWorker::TIMEOUT.ago
     end
+
+    factory :clusters_applications_ingress, class: Clusters::Applications::Ingress
+    factory :clusters_applications_prometheus, class: Clusters::Applications::Prometheus
   end
 end
diff --git a/spec/factories/clusters/applications/ingress.rb b/spec/factories/clusters/applications/ingress.rb
deleted file mode 100644
index 85f54a9d744..00000000000
--- a/spec/factories/clusters/applications/ingress.rb
+++ /dev/null
@@ -1,35 +0,0 @@
-FactoryBot.define do
-  factory :cluster_applications_ingress, class: Clusters::Applications::Ingress do
-    cluster factory: %i(cluster provided_by_gcp)
-
-    trait :not_installable do
-      status(-2)
-    end
-
-    trait :installable do
-      status 0
-    end
-
-    trait :scheduled do
-      status 1
-    end
-
-    trait :installing do
-      status 2
-    end
-
-    trait :installed do
-      status 3
-    end
-
-    trait :errored do
-      status(-1)
-      status_reason 'something went wrong'
-    end
-
-    trait :timeouted do
-      installing
-      updated_at ClusterWaitForAppInstallationWorker::TIMEOUT.ago
-    end
-  end
-end
diff --git a/spec/features/projects/clusters/applications_spec.rb b/spec/features/projects/clusters/applications_spec.rb
index b34cd061ec6..9c4abec115f 100644
--- a/spec/features/projects/clusters/applications_spec.rb
+++ b/spec/features/projects/clusters/applications_spec.rb
@@ -73,7 +73,7 @@ feature 'Clusters Applications', :js do
           before do
             allow(ClusterInstallAppWorker).to receive(:perform_async).and_return(nil)
 
-            create(:cluster_applications_helm, :installed, cluster: cluster)
+            create(:clusters_applications_helm, :installed, cluster: cluster)
 
             page.within('.js-cluster-application-row-ingress') do
               page.find(:css, '.js-cluster-application-install-button').click
diff --git a/spec/javascripts/clusters/components/applications_spec.js b/spec/javascripts/clusters/components/applications_spec.js
index 7460da031c4..1a8affad4e3 100644
--- a/spec/javascripts/clusters/components/applications_spec.js
+++ b/spec/javascripts/clusters/components/applications_spec.js
@@ -21,6 +21,7 @@ describe('Applications', () => {
           helm: { title: 'Helm Tiller' },
           ingress: { title: 'Ingress' },
           runner: { title: 'GitLab Runner' },
+          prometheus: { title: 'Prometheus' },
         },
       });
     });
@@ -33,6 +34,10 @@ describe('Applications', () => {
       expect(vm.$el.querySelector('.js-cluster-application-row-ingress')).toBeDefined();
     });
 
+    it('renders a row for Prometheus', () => {
+      expect(vm.$el.querySelector('.js-cluster-application-row-prometheus')).toBeDefined();
+    });
+
     /* * /
     it('renders a row for GitLab Runner', () => {
       expect(vm.$el.querySelector('.js-cluster-application-row-runner')).toBeDefined();
diff --git a/spec/javascripts/clusters/services/mock_data.js b/spec/javascripts/clusters/services/mock_data.js
index af6b6a73819..253b3c45243 100644
--- a/spec/javascripts/clusters/services/mock_data.js
+++ b/spec/javascripts/clusters/services/mock_data.js
@@ -22,6 +22,11 @@ const CLUSTERS_MOCK_DATA = {
           name: 'runner',
           status: APPLICATION_INSTALLING,
           status_reason: null,
+        },
+        {
+          name: 'prometheus',
+          status: APPLICATION_ERROR,
+          status_reason: 'Cannot connect',
         }],
       },
     },
@@ -30,6 +35,7 @@ const CLUSTERS_MOCK_DATA = {
     '/gitlab-org/gitlab-shell/clusters/1/applications/helm': { },
     '/gitlab-org/gitlab-shell/clusters/1/applications/ingress': { },
     '/gitlab-org/gitlab-shell/clusters/1/applications/runner': { },
+    '/gitlab-org/gitlab-shell/clusters/1/applications/prometheus': { },
   },
 };
 
diff --git a/spec/javascripts/clusters/stores/clusters_store_spec.js b/spec/javascripts/clusters/stores/clusters_store_spec.js
index cb8b3d38e2e..ec2889355e6 100644
--- a/spec/javascripts/clusters/stores/clusters_store_spec.js
+++ b/spec/javascripts/clusters/stores/clusters_store_spec.js
@@ -82,6 +82,13 @@ describe('Clusters Store', () => {
             requestStatus: null,
             requestReason: null,
           },
+          prometheus: {
+            title: 'Prometheus',
+            status: mockResponseData.applications[3].status,
+            statusReason: mockResponseData.applications[3].status_reason,
+            requestStatus: null,
+            requestReason: null,
+          },
         },
       });
     });
diff --git a/spec/lib/gitlab/kubernetes/helm_spec.rb b/spec/lib/gitlab/kubernetes/helm/api_spec.rb
index 15f99b0401f..69112fe90b1 100644
--- a/spec/lib/gitlab/kubernetes/helm_spec.rb
+++ b/spec/lib/gitlab/kubernetes/helm/api_spec.rb
@@ -1,22 +1,23 @@
 require 'spec_helper'
 
-describe Gitlab::Kubernetes::Helm do
+describe Gitlab::Kubernetes::Helm::Api do
   let(:client) { double('kubernetes client') }
   let(:helm) { described_class.new(client) }
-  let(:namespace) { Gitlab::Kubernetes::Namespace.new(described_class::NAMESPACE, client) }
+  let(:gitlab_namespace) { Gitlab::Kubernetes::Helm::NAMESPACE }
+  let(:namespace) { Gitlab::Kubernetes::Namespace.new(gitlab_namespace, client) }
   let(:install_helm) { true }
   let(:chart) { 'stable/a_chart' }
   let(:application_name) { 'app_name' }
-  let(:command) { Gitlab::Kubernetes::Helm::InstallCommand.new(application_name, install_helm, chart) }
+  let(:command) { Gitlab::Kubernetes::Helm::InstallCommand.new(application_name, install_helm: install_helm, chart: chart) }
   subject { helm }
 
   before do
-    allow(Gitlab::Kubernetes::Namespace).to receive(:new).with(described_class::NAMESPACE, client).and_return(namespace)
+    allow(Gitlab::Kubernetes::Namespace).to receive(:new).with(gitlab_namespace, client).and_return(namespace)
   end
 
   describe '#initialize' do
     it 'creates a namespace object' do
-      expect(Gitlab::Kubernetes::Namespace).to receive(:new).with(described_class::NAMESPACE, client)
+      expect(Gitlab::Kubernetes::Namespace).to receive(:new).with(gitlab_namespace, client)
 
       subject
     end
@@ -41,7 +42,7 @@ describe Gitlab::Kubernetes::Helm do
     let(:pod) { Kubeclient::Resource.new(status: { phase: phase }) } # partial representation
 
     it 'fetches POD phase from kubernetes cluster' do
-      expect(client).to receive(:get_pod).with(command.pod_name, described_class::NAMESPACE).once.and_return(pod)
+      expect(client).to receive(:get_pod).with(command.pod_name, gitlab_namespace).once.and_return(pod)
 
       expect(subject.installation_status(command.pod_name)).to eq(phase)
     end
@@ -52,7 +53,7 @@ describe Gitlab::Kubernetes::Helm do
     let(:response) { RestClient::Response.new(log) }
 
     it 'fetches POD phase from kubernetes cluster' do
-      expect(client).to receive(:get_pod_log).with(command.pod_name, described_class::NAMESPACE).once.and_return(response)
+      expect(client).to receive(:get_pod_log).with(command.pod_name, gitlab_namespace).once.and_return(response)
 
       expect(subject.installation_log(command.pod_name)).to eq(log)
     end
@@ -60,41 +61,9 @@ describe Gitlab::Kubernetes::Helm do
 
   describe '#delete_installation_pod!' do
     it 'deletes the POD from kubernetes cluster' do
-      expect(client).to receive(:delete_pod).with(command.pod_name, described_class::NAMESPACE).once
+      expect(client).to receive(:delete_pod).with(command.pod_name, gitlab_namespace).once
 
       subject.delete_installation_pod!(command.pod_name)
     end
   end
-
-  describe '#helm_init_command' do
-    subject { helm.send(:helm_init_command, command) }
-
-    context 'when command.install_helm is true' do
-      let(:install_helm) { true }
-
-      it { is_expected.to eq('helm init >/dev/null') }
-    end
-
-    context 'when command.install_helm is false' do
-      let(:install_helm) { false }
-
-      it { is_expected.to eq('helm init --client-only >/dev/null') }
-    end
-  end
-
-  describe '#helm_install_command' do
-    subject { helm.send(:helm_install_command, command) }
-
-    context 'when command.chart is nil' do
-      let(:chart) { nil }
-
-      it { is_expected.to be_nil }
-    end
-
-    context 'when command.chart is set' do
-      let(:chart) { 'stable/a_chart' }
-
-      it { is_expected.to eq("helm install #{chart} --name #{application_name} --namespace #{namespace.name} >/dev/null")}
-    end
-  end
 end
diff --git a/spec/lib/gitlab/kubernetes/helm/install_command_spec.rb b/spec/lib/gitlab/kubernetes/helm/install_command_spec.rb
new file mode 100644
index 00000000000..4afe48e72ad
--- /dev/null
+++ b/spec/lib/gitlab/kubernetes/helm/install_command_spec.rb
@@ -0,0 +1,111 @@
+require 'rails_helper'
+
+describe Gitlab::Kubernetes::Helm::InstallCommand do
+  let(:prometheus) { create(:clusters_applications_prometheus) }
+
+  describe "#initialize" do
+    context "With all the params" do
+      subject { described_class.new(prometheus.name, install_helm: true, chart: prometheus.chart, chart_values_file: prometheus.chart_values_file) }
+
+      it 'should assign all parameters' do
+        expect(subject.name).to eq(prometheus.name)
+        expect(subject.install_helm).to be_truthy
+        expect(subject.chart).to eq(prometheus.chart)
+        expect(subject.chart_values_file).to eq("#{Rails.root}/vendor/prometheus/values.yaml")
+      end
+    end
+
+    context 'when install_helm is not set' do
+      subject { described_class.new(prometheus.name, chart: prometheus.chart, chart_values_file: true) }
+
+      it 'should set install_helm as false' do
+        expect(subject.install_helm).to be_falsy
+      end
+    end
+
+    context 'when chart is not set' do
+      subject { described_class.new(prometheus.name, install_helm: true) }
+
+      it 'should set chart as nil' do
+        expect(subject.chart).to be_falsy
+      end
+    end
+
+    context 'when chart_values_file is not set' do
+      subject { described_class.new(prometheus.name, install_helm: true, chart: prometheus.chart) }
+
+      it 'should set chart_values_file as nil' do
+        expect(subject.chart_values_file).to be_falsy
+      end
+    end
+  end
+
+  describe "#generate_script" do
+    let(:install_command) { described_class.new(prometheus.name, install_helm: install_helm) }
+    let(:client) { double('kubernetes client') }
+    let(:namespace) { Gitlab::Kubernetes::Namespace.new(Gitlab::Kubernetes::Helm::NAMESPACE, client) }
+    subject { install_command.send(:generate_script, namespace.name) }
+
+    context 'when install helm is true' do
+      let(:install_helm) { true }
+      let(:command) do
+        <<~MSG
+        set -eo pipefail
+        apk add -U ca-certificates openssl >/dev/null
+        wget -q -O - https://kubernetes-helm.storage.googleapis.com/helm-v2.7.0-linux-amd64.tar.gz | tar zxC /tmp >/dev/null
+        mv /tmp/linux-amd64/helm /usr/bin/
+
+        helm init >/dev/null
+        MSG
+      end
+
+      it 'should return appropriate command' do
+        is_expected.to eq(command)
+      end
+    end
+
+    context 'when install helm is false' do
+      let(:install_helm) { false }
+      let(:command) do
+        <<~MSG
+        set -eo pipefail
+        apk add -U ca-certificates openssl >/dev/null
+        wget -q -O - https://kubernetes-helm.storage.googleapis.com/helm-v2.7.0-linux-amd64.tar.gz | tar zxC /tmp >/dev/null
+        mv /tmp/linux-amd64/helm /usr/bin/
+
+        helm init --client-only >/dev/null
+        MSG
+      end
+
+      it 'should return appropriate command' do
+        is_expected.to eq(command)
+      end
+    end
+
+    context 'when chart is present' do
+      let(:install_command) { described_class.new(prometheus.name, chart: prometheus.chart) }
+      let(:command) do
+        <<~MSG.chomp
+        set -eo pipefail
+        apk add -U ca-certificates openssl >/dev/null
+        wget -q -O - https://kubernetes-helm.storage.googleapis.com/helm-v2.7.0-linux-amd64.tar.gz | tar zxC /tmp >/dev/null
+        mv /tmp/linux-amd64/helm /usr/bin/
+
+        helm init --client-only >/dev/null
+        helm install #{prometheus.chart} --name #{prometheus.name} --namespace #{namespace.name} >/dev/null
+        MSG
+      end
+
+      it 'should return appropriate command' do
+        is_expected.to eq(command)
+      end
+    end
+  end
+
+  describe "#pod_name" do
+    let(:install_command) { described_class.new(prometheus.name, install_helm: true, chart: prometheus.chart, chart_values_file: true) }
+    subject { install_command.send(:pod_name) }
+
+    it { is_expected.to eq('install-prometheus') }
+  end
+end
diff --git a/spec/lib/gitlab/kubernetes/helm/pod_spec.rb b/spec/lib/gitlab/kubernetes/helm/pod_spec.rb
new file mode 100644
index 00000000000..906b10b96d4
--- /dev/null
+++ b/spec/lib/gitlab/kubernetes/helm/pod_spec.rb
@@ -0,0 +1,86 @@
+require 'rails_helper'
+
+describe Gitlab::Kubernetes::Helm::Pod do
+  describe '#generate' do
+    let(:cluster) { create(:cluster) }
+    let(:app) {  create(:clusters_applications_prometheus, cluster: cluster) }
+    let(:command) {  app.install_command }
+    let(:client) { double('kubernetes client') }
+    let(:namespace) { Gitlab::Kubernetes::Namespace.new(Gitlab::Kubernetes::Helm::NAMESPACE, client) }
+    subject { described_class.new(command, namespace.name, client) }
+
+    before do
+      allow(client).to receive(:create_config_map).and_return(nil)
+    end
+
+    shared_examples 'helm pod' do
+      it 'should generate a Kubeclient::Resource' do
+        expect(subject.generate).to be_a_kind_of(Kubeclient::Resource)
+      end
+
+      it 'should generate the appropriate metadata' do
+        metadata = subject.generate.metadata
+        expect(metadata.name).to eq("install-#{app.name}")
+        expect(metadata.namespace).to eq('gitlab-managed-apps')
+        expect(metadata.labels['gitlab.org/action']).to eq('install')
+        expect(metadata.labels['gitlab.org/application']).to eq(app.name)
+      end
+
+      it 'should generate a container spec' do
+        spec = subject.generate.spec
+        expect(spec.containers.count).to eq(1)
+      end
+
+      it 'should generate the appropriate specifications for the container' do
+        container = subject.generate.spec.containers.first
+        expect(container.name).to eq('helm')
+        expect(container.image).to eq('alpine:3.6')
+        expect(container.env.count).to eq(3)
+        expect(container.env.map(&:name)).to match_array([:HELM_VERSION, :TILLER_NAMESPACE, :COMMAND_SCRIPT])
+        expect(container.command).to match_array(["/bin/sh"])
+        expect(container.args).to match_array(["-c", "$(COMMAND_SCRIPT)"])
+      end
+
+      it 'should include a never restart policy' do
+        spec = subject.generate.spec
+        expect(spec.restartPolicy).to eq('Never')
+      end
+    end
+
+    context 'with a configuration file' do
+      it_behaves_like 'helm pod'
+
+      it 'should include volumes for the container' do
+        container = subject.generate.spec.containers.first
+        expect(container.volumeMounts.first['name']).to eq('config-volume')
+        expect(container.volumeMounts.first['mountPath']).to eq('/etc/config')
+      end
+
+      it 'should include a volume inside the specification' do
+        spec = subject.generate.spec
+        expect(spec.volumes.first['name']).to eq('config-volume')
+      end
+
+      it 'should mount configMap specification in the volume' do
+        spec = subject.generate.spec
+        expect(spec.volumes.first.configMap['name']).to eq('values-config')
+      end
+    end
+
+    context 'without a configuration file' do
+      let(:app) { create(:clusters_applications_ingress, cluster: cluster) }
+
+      it_behaves_like 'helm pod'
+
+      it 'should not include volumeMounts inside the container' do
+        container = subject.generate.spec.containers.first
+        expect(container.volumeMounts).to be_nil
+      end
+
+      it 'should not a volume inside the specification' do
+        spec = subject.generate.spec
+        expect(spec.volumes).to be_nil
+      end
+    end
+  end
+end
diff --git a/spec/models/clusters/applications/helm_spec.rb b/spec/models/clusters/applications/helm_spec.rb
index f8855079842..eb57abaf6ef 100644
--- a/spec/models/clusters/applications/helm_spec.rb
+++ b/spec/models/clusters/applications/helm_spec.rb
@@ -40,13 +40,13 @@ describe Clusters::Applications::Helm do
 
   describe '#install_command' do
     it 'has all the needed information' do
-      expect(subject.install_command).to have_attributes(name: subject.name, install_helm: true, chart: nil)
+      expect(subject.install_command).to have_attributes(name: subject.name, install_helm: true)
     end
   end
 
   describe 'status state machine' do
     describe '#make_installing' do
-      subject { create(:cluster_applications_helm, :scheduled) }
+      subject { create(:clusters_applications_helm, :scheduled) }
 
       it 'is installing' do
         subject.make_installing!
@@ -56,7 +56,7 @@ describe Clusters::Applications::Helm do
     end
 
     describe '#make_installed' do
-      subject { create(:cluster_applications_helm, :installing) }
+      subject { create(:clusters_applications_helm, :installing) }
 
       it 'is installed' do
         subject.make_installed
@@ -66,7 +66,7 @@ describe Clusters::Applications::Helm do
     end
 
     describe '#make_errored' do
-      subject { create(:cluster_applications_helm, :installing) }
+      subject { create(:clusters_applications_helm, :installing) }
       let(:reason) { 'some errors' }
 
       it 'is errored' do
@@ -78,7 +78,7 @@ describe Clusters::Applications::Helm do
     end
 
     describe '#make_scheduled' do
-      subject { create(:cluster_applications_helm, :installable) }
+      subject { create(:clusters_applications_helm, :installable) }
 
       it 'is scheduled' do
         subject.make_scheduled
@@ -87,7 +87,7 @@ describe Clusters::Applications::Helm do
       end
 
       describe 'when was errored' do
-        subject { create(:cluster_applications_helm, :errored) }
+        subject { create(:clusters_applications_helm, :errored) }
 
         it 'clears #status_reason' do
           expect(subject.status_reason).not_to be_nil
diff --git a/spec/models/clusters/applications/ingress_spec.rb b/spec/models/clusters/applications/ingress_spec.rb
index b83472e1944..619c088b0bf 100644
--- a/spec/models/clusters/applications/ingress_spec.rb
+++ b/spec/models/clusters/applications/ingress_spec.rb
@@ -4,105 +4,5 @@ describe Clusters::Applications::Ingress do
   it { is_expected.to belong_to(:cluster) }
   it { is_expected.to validate_presence_of(:cluster) }
 
-  describe '#name' do
-    it 'is .application_name' do
-      expect(subject.name).to eq(described_class.application_name)
-    end
-
-    it 'is recorded in Clusters::Cluster::APPLICATIONS' do
-      expect(Clusters::Cluster::APPLICATIONS[subject.name]).to eq(described_class)
-    end
-  end
-
-  describe '#status' do
-    let(:cluster) { create(:cluster, :provided_by_gcp) }
-
-    subject { described_class.new(cluster: cluster) }
-
-    it 'defaults to :not_installable' do
-      expect(subject.status_name).to be(:not_installable)
-    end
-
-    context 'when application helm is scheduled' do
-      before do
-        create(:cluster_applications_helm, :scheduled, cluster: cluster)
-      end
-
-      it 'defaults to :not_installable' do
-        expect(subject.status_name).to be(:not_installable)
-      end
-    end
-
-    context 'when application helm is installed' do
-      before do
-        create(:cluster_applications_helm, :installed, cluster: cluster)
-      end
-
-      it 'defaults to :installable' do
-        expect(subject.status_name).to be(:installable)
-      end
-    end
-  end
-
-  describe '#install_command' do
-    it 'has all the needed information' do
-      expect(subject.install_command).to have_attributes(name: subject.name, install_helm: false, chart: subject.chart)
-    end
-  end
-
-  describe 'status state machine' do
-    describe '#make_installing' do
-      subject { create(:cluster_applications_ingress, :scheduled) }
-
-      it 'is installing' do
-        subject.make_installing!
-
-        expect(subject).to be_installing
-      end
-    end
-
-    describe '#make_installed' do
-      subject { create(:cluster_applications_ingress, :installing) }
-
-      it 'is installed' do
-        subject.make_installed
-
-        expect(subject).to be_installed
-      end
-    end
-
-    describe '#make_errored' do
-      subject { create(:cluster_applications_ingress, :installing) }
-      let(:reason) { 'some errors' }
-
-      it 'is errored' do
-        subject.make_errored(reason)
-
-        expect(subject).to be_errored
-        expect(subject.status_reason).to eq(reason)
-      end
-    end
-
-    describe '#make_scheduled' do
-      subject { create(:cluster_applications_ingress, :installable) }
-
-      it 'is scheduled' do
-        subject.make_scheduled
-
-        expect(subject).to be_scheduled
-      end
-
-      describe 'when was errored' do
-        subject { create(:cluster_applications_ingress, :errored) }
-
-        it 'clears #status_reason' do
-          expect(subject.status_reason).not_to be_nil
-
-          subject.make_scheduled!
-
-          expect(subject.status_reason).to be_nil
-        end
-      end
-    end
-  end
+  include_examples 'cluster application specs', described_class
 end
diff --git a/spec/models/clusters/applications/prometheus_spec.rb b/spec/models/clusters/applications/prometheus_spec.rb
new file mode 100644
index 00000000000..696099f7cf7
--- /dev/null
+++ b/spec/models/clusters/applications/prometheus_spec.rb
@@ -0,0 +1,16 @@
+require 'rails_helper'
+
+describe Clusters::Applications::Prometheus do
+  it { is_expected.to belong_to(:cluster) }
+  it { is_expected.to validate_presence_of(:cluster) }
+
+  include_examples 'cluster application specs', described_class
+
+  describe "#chart_values_file" do
+    subject { create(:clusters_applications_prometheus).chart_values_file }
+
+    it 'should return chart values file path' do
+      expect(subject).to eq("#{Rails.root}/vendor/prometheus/values.yaml")
+    end
+  end
+end
diff --git a/spec/models/clusters/cluster_spec.rb b/spec/models/clusters/cluster_spec.rb
index 2683d21ddbe..799d7ced116 100644
--- a/spec/models/clusters/cluster_spec.rb
+++ b/spec/models/clusters/cluster_spec.rb
@@ -5,6 +5,9 @@ describe Clusters::Cluster do
   it { is_expected.to have_many(:projects) }
   it { is_expected.to have_one(:provider_gcp) }
   it { is_expected.to have_one(:platform_kubernetes) }
+  it { is_expected.to have_one(:application_helm) }
+  it { is_expected.to have_one(:application_ingress) }
+  it { is_expected.to have_one(:application_prometheus) }
   it { is_expected.to delegate_method(:status).to(:provider) }
   it { is_expected.to delegate_method(:status_reason).to(:provider) }
   it { is_expected.to delegate_method(:status_name).to(:provider) }
@@ -190,11 +193,12 @@ describe Clusters::Cluster do
     end
 
     context 'when applications are created' do
-      let!(:helm) { create(:cluster_applications_helm, cluster: cluster) }
-      let!(:ingress) { create(:cluster_applications_ingress, cluster: cluster) }
+      let!(:helm) { create(:clusters_applications_helm, cluster: cluster) }
+      let!(:ingress) { create(:clusters_applications_ingress, cluster: cluster) }
+      let!(:prometheus) { create(:clusters_applications_prometheus, cluster: cluster) }
 
       it 'returns a list of created applications' do
-        is_expected.to contain_exactly(helm, ingress)
+        is_expected.to contain_exactly(helm, ingress, prometheus)
       end
     end
   end
diff --git a/spec/serializers/cluster_application_entity_spec.rb b/spec/serializers/cluster_application_entity_spec.rb
index 87c7b2ad36e..b5a55b4ef6e 100644
--- a/spec/serializers/cluster_application_entity_spec.rb
+++ b/spec/serializers/cluster_application_entity_spec.rb
@@ -2,7 +2,7 @@ require 'spec_helper'
 
 describe ClusterApplicationEntity do
   describe '#as_json' do
-    let(:application) { build(:cluster_applications_helm) }
+    let(:application) { build(:clusters_applications_helm) }
     subject { described_class.new(application).as_json }
 
     it 'has name' do
@@ -18,7 +18,7 @@ describe ClusterApplicationEntity do
     end
 
     context 'when application is errored' do
-      let(:application) { build(:cluster_applications_helm, :errored) }
+      let(:application) { build(:clusters_applications_helm, :errored) }
 
       it 'has corresponded data' do
         expect(subject[:status]).to eq(:errored)
diff --git a/spec/services/clusters/applications/check_installation_progress_service_spec.rb b/spec/services/clusters/applications/check_installation_progress_service_spec.rb
index 75fc05d36e9..6894c1797b0 100644
--- a/spec/services/clusters/applications/check_installation_progress_service_spec.rb
+++ b/spec/services/clusters/applications/check_installation_progress_service_spec.rb
@@ -3,7 +3,7 @@ require 'spec_helper'
 describe Clusters::Applications::CheckInstallationProgressService do
   RESCHEDULE_PHASES = Gitlab::Kubernetes::Pod::PHASES - [Gitlab::Kubernetes::Pod::SUCCEEDED, Gitlab::Kubernetes::Pod::FAILED].freeze
 
-  let(:application) { create(:cluster_applications_helm, :installing) }
+  let(:application) { create(:clusters_applications_helm, :installing) }
   let(:service) { described_class.new(application) }
   let(:phase) { Gitlab::Kubernetes::Pod::UNKNOWN }
   let(:errors) { nil }
@@ -33,7 +33,7 @@ describe Clusters::Applications::CheckInstallationProgressService do
       end
 
       context 'when timeouted' do
-        let(:application) { create(:cluster_applications_helm, :timeouted) }
+        let(:application) { create(:clusters_applications_helm, :timeouted) }
 
         it_behaves_like 'a terminated installation'
 
diff --git a/spec/services/clusters/applications/install_service_spec.rb b/spec/services/clusters/applications/install_service_spec.rb
index 054a49ffedf..ad175226e92 100644
--- a/spec/services/clusters/applications/install_service_spec.rb
+++ b/spec/services/clusters/applications/install_service_spec.rb
@@ -2,17 +2,19 @@ require 'spec_helper'
 
 describe Clusters::Applications::InstallService do
   describe '#execute' do
-    let(:application) { create(:cluster_applications_helm, :scheduled) }
+    let(:application) { create(:clusters_applications_helm, :scheduled) }
+    let!(:install_command) { application.install_command }
     let(:service) { described_class.new(application) }
-    let(:helm_client) { instance_double(Gitlab::Kubernetes::Helm) }
+    let(:helm_client) { instance_double(Gitlab::Kubernetes::Helm::Api) }
 
     before do
+      allow(service).to receive(:install_command).and_return(install_command)
       allow(service).to receive(:helm_api).and_return(helm_client)
     end
 
     context 'when there are no errors' do
       before do
-        expect(helm_client).to receive(:install).with(application.install_command)
+        expect(helm_client).to receive(:install).with(install_command)
         allow(ClusterWaitForAppInstallationWorker).to receive(:perform_in).and_return(nil)
       end
 
@@ -33,7 +35,7 @@ describe Clusters::Applications::InstallService do
     context 'when k8s cluster communication fails' do
       before do
         error = KubeException.new(500, 'system failure', nil)
-        expect(helm_client).to receive(:install).with(application.install_command).and_raise(error)
+        expect(helm_client).to receive(:install).with(install_command).and_raise(error)
       end
 
       it 'make the application errored' do
@@ -45,7 +47,7 @@ describe Clusters::Applications::InstallService do
     end
 
     context 'when application cannot be persisted' do
-      let(:application) { build(:cluster_applications_helm, :scheduled) }
+      let(:application) { build(:clusters_applications_helm, :scheduled) }
 
       it 'make the application errored' do
         expect(application).to receive(:make_installing!).once.and_raise(ActiveRecord::RecordInvalid)
diff --git a/spec/services/clusters/applications/schedule_installation_service_spec.rb b/spec/services/clusters/applications/schedule_installation_service_spec.rb
index 047a6e44dab..473dbcbb692 100644
--- a/spec/services/clusters/applications/schedule_installation_service_spec.rb
+++ b/spec/services/clusters/applications/schedule_installation_service_spec.rb
@@ -34,7 +34,7 @@ describe Clusters::Applications::ScheduleInstallationService do
     end
 
     context 'when installation is already in progress' do
-      let(:application) { create(:cluster_applications_helm, :installing) }
+      let(:application) { create(:clusters_applications_helm, :installing) }
       let(:cluster) { application.cluster }
 
       it_behaves_like 'a failing service'
diff --git a/spec/support/cluster_application_spec.rb b/spec/support/cluster_application_spec.rb
new file mode 100644
index 00000000000..ab77910a050
--- /dev/null
+++ b/spec/support/cluster_application_spec.rb
@@ -0,0 +1,105 @@
+shared_examples 'cluster application specs' do
+  let(:factory_name) { described_class.to_s.downcase.gsub("::", "_") }
+
+  describe '#name' do
+    it 'is .application_name' do
+      expect(subject.name).to eq(described_class.application_name)
+    end
+
+    it 'is recorded in Clusters::Cluster::APPLICATIONS' do
+      expect(Clusters::Cluster::APPLICATIONS[subject.name]).to eq(described_class)
+    end
+  end
+
+  describe '#status' do
+    let(:cluster) { create(:cluster, :provided_by_gcp) }
+
+    subject { described_class.new(cluster: cluster) }
+
+    it 'defaults to :not_installable' do
+      expect(subject.status_name).to be(:not_installable)
+    end
+
+    context 'when application helm is scheduled' do
+      before do
+        create(factory_name, :scheduled, cluster: cluster)
+      end
+
+      it 'defaults to :not_installable' do
+        expect(subject.status_name).to be(:not_installable)
+      end
+    end
+
+    context 'when application helm is installed' do
+      before do
+        create(:clusters_applications_helm, :installed, cluster: cluster)
+      end
+
+      it 'defaults to :installable' do
+        expect(subject.status_name).to be(:installable)
+      end
+    end
+  end
+
+  describe '#install_command' do
+    it 'has all the needed information' do
+      expect(subject.install_command).to have_attributes(name: subject.name, install_helm: false)
+    end
+  end
+
+  describe 'status state machine' do
+    describe '#make_installing' do
+      subject { create(factory_name, :scheduled) }
+
+      it 'is installing' do
+        subject.make_installing!
+
+        expect(subject).to be_installing
+      end
+    end
+
+    describe '#make_installed' do
+      subject { create(factory_name, :installing) }
+
+      it 'is installed' do
+        subject.make_installed
+
+        expect(subject).to be_installed
+      end
+    end
+
+    describe '#make_errored' do
+      subject { create(factory_name, :installing) }
+      let(:reason) { 'some errors' }
+
+      it 'is errored' do
+        subject.make_errored(reason)
+
+        expect(subject).to be_errored
+        expect(subject.status_reason).to eq(reason)
+      end
+    end
+
+    describe '#make_scheduled' do
+      subject { create(factory_name, :installable) }
+
+      it 'is scheduled' do
+        subject.make_scheduled
+
+        expect(subject).to be_scheduled
+      end
+
+      describe 'when was errored' do
+        subject { create(factory_name, :errored) }
+
+        it 'clears #status_reason' do
+          expect(subject.status_reason).not_to be_nil
+
+          subject.make_scheduled!
+
+          expect(subject.status_reason).to be_nil
+        end
+      end
+    end
+  end
+end
diff --git a/vendor/prometheus/values.yaml b/vendor/prometheus/values.yaml
new file mode 100644
index 00000000000..dd9496deb4d
--- /dev/null
+++ b/vendor/prometheus/values.yaml
@@ -0,0 +1,134 @@
+alertmanager: |
+  enabled: false
+
+kubeStateMetrics: |
+  enabled: 'false'
+
+nodeExporter: |
+  enabled: 'false'
+
+pushgateway: |
+  enabled: 'false'
+
+serverFiles: |
+  alerts: ''
+  rules: ''
+
+  prometheus.yml: |-
+    rule_files: |
+      - /etc/config/rules
+      - /etc/config/alerts
+    scrape_configs: |
+      - job_name: prometheus
+        static_configs: |
+          - targets:
+            - localhost:9090
+
+      - job_name: 'kubernetes-apiservers'
+        kubernetes_sd_configs: |
+          - role: endpoints
+        scheme: https
+
+        tls_config:
+          ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
+          insecure_skip_verify: true
+        bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
+        relabel_configs:
+          - source_labels: [__meta_kubernetes_namespace, __meta_kubernetes_service_name, __meta_kubernetes_endpoint_port_name]
+            action: keep
+            regex: default;kubernetes;https
+      - job_name: 'kubernetes-nodes'
+        scheme: https
+        tls_config:
+          ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
+          insecure_skip_verify: true
+        bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
+        kubernetes_sd_configs:
+          - role: node
+        relabel_configs:
+          - action: labelmap
+            regex: __meta_kubernetes_node_label_(.+)
+          - target_label: __address__
+            replacement: kubernetes.default.svc:443
+          - source_labels: [__meta_kubernetes_node_name]
+            regex: (.+)
+            target_label: __metrics_path__
+            replacement: /api/v1/nodes/${1}/proxy/metrics
+ 
+      - job_name: 'kubernetes-service-endpoints'
+        kubernetes_sd_configs:
+          - role: endpoints
+        relabel_configs: |
+          - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scrape]
+            action: keep
+            regex: 'true'
+          - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scheme]
+            action: replace
+            target_label: __scheme__
+            regex: (https?)
+          - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_path]
+            action: replace
+            target_label: __metrics_path__
+            regex: (.+)
+          - source_labels: [__address__, __meta_kubernetes_service_annotation_prometheus_io_port]
+            action: replace
+            target_label: __address__
+            regex: (.+)(?::\d+);(\d+)
+            replacement: $1:$2
+          - action: labelmap
+            regex: __meta_kubernetes_service_label_(.+)
+          - source_labels: [__meta_kubernetes_namespace]
+            action: replace
+            target_label: kubernetes_namespace
+          - source_labels: [__meta_kubernetes_service_name]
+            action: replace
+            target_label: kubernetes_name
+      - job_name: 'prometheus-pushgateway'
+        honor_labels: true
+        kubernetes_sd_configs: |
+          - role: service
+        relabel_configs: |
+          - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_probe]
+            action: keep
+            regex: pushgateway
+      - job_name: 'kubernetes-services'
+        metrics_path: /probe
+        params: |
+          module: [http_2xx]
+        kubernetes_sd_configs: |
+          - role: service
+        relabel_configs: |
+          - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_probe]
+            action: keep
+            regex: 'true'
+          - source_labels: [__address__]
+            target_label: __param_target
+          - target_label: __address__
+            replacement: blackbox
+          - source_labels: [__param_target]
+            target_label: instance
+          - action: labelmap
+            regex: __meta_kubernetes_service_label_(.+)
+          - source_labels: [__meta_kubernetes_namespace]
+            target_label: kubernetes_namespace
+          - source_labels: [__meta_kubernetes_service_name]
+            target_label: kubernetes_name
+      - job_name: 'kubernetes-pods'
+        kubernetes_sd_configs:
+          - role: pod
+        relabel_configs:
+          - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scrape]
+            action: keep
+            regex: 'true'
+          - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_path]
+            action: replace
+            target_label: __metrics_path__
+            regex: (.+)
+          - action: labelmap
+            regex: __meta_kubernetes_pod_label_(.+)
+          - source_labels: [__meta_kubernetes_namespace]
+            action: replace
+            target_label: kubernetes_namespace
+          - source_labels: [__meta_kubernetes_pod_name]
+            action: replace
+            target_label: kubernetes_pod_name