Extend Cluster Applications to allow installation of Prometheus

12 files changed, 97 insertions, 40 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,