Extend Cluster Applications to install GitLab Runner to Kubernetes cluster

6 files changed, 109 insertions, 13 deletions

diff --git a/app/models/clusters/applications/helm.rb b/app/models/clusters/applications/helm.rb
index 193bb48e54d..58de3448577 100644
--- a/app/models/clusters/applications/helm.rb
+++ b/app/models/clusters/applications/helm.rb
@@ -15,7 +15,7 @@ module Clusters
       end
 
       def install_command
-        Gitlab::Kubernetes::Helm::InstallCommand.new(name, install_helm: true)
+        Gitlab::Kubernetes::Helm::InitCommand.new(name)
       end
     end
   end
diff --git a/app/models/clusters/applications/ingress.rb b/app/models/clusters/applications/ingress.rb
index 9f583342c19..27fc3b85465 100644
--- a/app/models/clusters/applications/ingress.rb
+++ b/app/models/clusters/applications/ingress.rb
@@ -5,6 +5,7 @@ module Clusters
 
       include ::Clusters::Concerns::ApplicationCore
       include ::Clusters::Concerns::ApplicationStatus
+      include ::Clusters::Concerns::ApplicationData
       include AfterCommitQueue
 
       default_value_for :ingress_type, :nginx
@@ -29,12 +30,12 @@ module Clusters
         'stable/nginx-ingress'
       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)
+        Gitlab::Kubernetes::Helm::InstallCommand.new(
+          name,
+          chart: chart,
+          values: values
+        )
       end
 
       def schedule_status_update
diff --git a/app/models/clusters/applications/prometheus.rb b/app/models/clusters/applications/prometheus.rb
index aa22e9d5d58..89ebd63e605 100644
--- a/app/models/clusters/applications/prometheus.rb
+++ b/app/models/clusters/applications/prometheus.rb
@@ -7,6 +7,7 @@ module Clusters
 
       include ::Clusters::Concerns::ApplicationCore
       include ::Clusters::Concerns::ApplicationStatus
+      include ::Clusters::Concerns::ApplicationData
 
       default_value_for :version, VERSION
 
@@ -30,12 +31,12 @@ module Clusters
         80
       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)
+        Gitlab::Kubernetes::Helm::InstallCommand.new(
+          name,
+          chart: chart,
+          values: values
+        )
       end
 
       def proxy_client
diff --git a/app/models/clusters/applications/runner.rb b/app/models/clusters/applications/runner.rb
new file mode 100644
index 00000000000..7adf1663c35
--- /dev/null
+++ b/app/models/clusters/applications/runner.rb
@@ -0,0 +1,68 @@
+module Clusters
+  module Applications
+    class Runner < ActiveRecord::Base
+      VERSION = '0.1.13'.freeze
+
+      self.table_name = 'clusters_applications_runners'
+
+      include ::Clusters::Concerns::ApplicationCore
+      include ::Clusters::Concerns::ApplicationStatus
+      include ::Clusters::Concerns::ApplicationData
+
+      belongs_to :runner, class_name: 'Ci::Runner', foreign_key: :runner_id
+      delegate :project, to: :cluster
+
+      default_value_for :version, VERSION
+
+      def chart
+        "#{name}/gitlab-runner"
+      end
+
+      def repository
+        'https://charts.gitlab.io'
+      end
+
+      def values
+        content_values.to_yaml
+      end
+
+      def install_command
+        Gitlab::Kubernetes::Helm::InstallCommand.new(
+          name,
+          chart: chart,
+          values: values,
+          repository: repository
+        )
+      end
+
+      private
+
+      def ensure_runner
+        runner || create_and_assign_runner
+      end
+
+      def create_and_assign_runner
+        transaction do
+          project.runners.create!(name: 'kubernetes-cluster', tag_list: %w(kubernetes cluster)).tap do |runner|
+            update!(runner_id: runner.id)
+          end
+        end
+      end
+
+      def gitlab_url
+        Gitlab::Routing.url_helpers.root_url(only_path: false)
+      end
+
+      def specification
+        {
+          "gitlabUrl" => gitlab_url,
+          "runnerToken" => ensure_runner.token
+        }
+      end
+
+      def content_values
+        specification.merge(YAML.load_file(chart_values_file))
+      end
+    end
+  end
+end
diff --git a/app/models/clusters/cluster.rb b/app/models/clusters/cluster.rb
index 8678f70f78c..1c0046107d7 100644
--- a/app/models/clusters/cluster.rb
+++ b/app/models/clusters/cluster.rb
@@ -7,7 +7,8 @@ module Clusters
     APPLICATIONS = {
       Applications::Helm.application_name => Applications::Helm,
       Applications::Ingress.application_name => Applications::Ingress,
-      Applications::Prometheus.application_name => Applications::Prometheus
+      Applications::Prometheus.application_name => Applications::Prometheus,
+      Applications::Runner.application_name => Applications::Runner
     }.freeze
 
     belongs_to :user
@@ -23,6 +24,7 @@ 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'
+    has_one :application_runner, class_name: 'Clusters::Applications::Runner'
 
     accepts_nested_attributes_for :provider_gcp, update_only: true
     accepts_nested_attributes_for :platform_kubernetes, update_only: true
@@ -68,7 +70,8 @@ module Clusters
       [
         application_helm || build_application_helm,
         application_ingress || build_application_ingress,
-        application_prometheus || build_application_prometheus
+        application_prometheus || build_application_prometheus,
+        application_runner || build_application_runner
       ]
     end
 
diff --git a/app/models/clusters/concerns/application_data.rb b/app/models/clusters/concerns/application_data.rb
new file mode 100644
index 00000000000..96ac757e99e
--- /dev/null
+++ b/app/models/clusters/concerns/application_data.rb
@@ -0,0 +1,23 @@
+module Clusters
+  module Concerns
+    module ApplicationData
+      extend ActiveSupport::Concern
+
+      included do
+        def repository
+          nil
+        end
+
+        def values
+          File.read(chart_values_file)
+        end
+
+        private
+
+        def chart_values_file
+          "#{Rails.root}/vendor/#{name}/values.yaml"
+        end
+      end
+    end
+  end
+end