Add installed scope to cluster applications

app/models/clusters/applications/helm.rb

@@ -8,6 +8,8 @@ module Clusters
 
       default_value_for :version, Gitlab::Kubernetes::Helm::HELM_VERSION
 
+      scope :installed, -> { where(status: ::Clusters::Applications::Helm.state_machines[:status].states[:installed].value) }
+
       def set_initial_status
         return unless not_installable?
 

app/models/clusters/applications/ingress.rb

@@ -11,6 +11,8 @@ module Clusters
       default_value_for :ingress_type, :nginx
       default_value_for :version, :nginx
 
+      scope :installed, -> { where(status: ::Clusters::Applications::Ingress.state_machines[:status].states[:installed].value) }
+
       enum ingress_type: {
         nginx: 1
       }

app/models/clusters/applications/prometheus.rb

@@ -13,6 +13,8 @@ module Clusters
 
       default_value_for :version, VERSION
 
+      scope :installed, -> { where(status: ::Clusters::Applications::Prometheus.state_machines[:status].states[:installed].value) }
+
       state_machine :status do
         after_transition any => [:installed] do |application|
           application.cluster.projects.each do |project|

app/models/clusters/applications/runner.rb

@@ -14,6 +14,8 @@ module Clusters
 
       default_value_for :version, VERSION
 
+      scope :installed, -> { where(status: ::Clusters::Applications::Runner.state_machines[:status].states[:installed].value) }
+
       def chart
         "#{name}/gitlab-runner"
       end

spec/models/clusters/applications/helm_spec.rb

@@ -3,6 +3,18 @@ require 'rails_helper'
 describe Clusters::Applications::Helm do
   include_examples 'cluster application core specs', :clusters_applications_helm
 
+  describe '.installed' do
+    subject { described_class.installed }
+
+    let!(:cluster) { create(:clusters_applications_helm, :installed) }
+
+    before do
+      create(:clusters_applications_helm, :errored)
+    end
+
+    it { is_expected.to contain_exactly(cluster) }
+  end
+
   describe '#install_command' do
     let(:helm) { create(:clusters_applications_helm) }
 

spec/models/clusters/applications/ingress_spec.rb

@@ -11,6 +11,18 @@ describe Clusters::Applications::Ingress do
     allow(ClusterWaitForIngressIpAddressWorker).to receive(:perform_async)
   end
 
+  describe '.installed' do
+    subject { described_class.installed }
+
+    let!(:cluster) { create(:clusters_applications_ingress, :installed) }
+
+    before do
+      create(:clusters_applications_ingress, :errored)
+    end
+
+    it { is_expected.to contain_exactly(cluster) }
+  end
+
   describe '#make_installed!' do
     before do
       application.make_installed!

spec/models/clusters/applications/prometheus_spec.rb

@@ -4,6 +4,18 @@ describe Clusters::Applications::Prometheus do
   include_examples 'cluster application core specs', :clusters_applications_prometheus
   include_examples 'cluster application status specs', :cluster_application_prometheus
 
+  describe '.installed' do
+    subject { described_class.installed }
+
+    let!(:cluster) { create(:clusters_applications_prometheus, :installed) }
+
+    before do
+      create(:clusters_applications_prometheus, :errored)
+    end
+
+    it { is_expected.to contain_exactly(cluster) }
+  end
+
   describe 'transition to installed' do
     let(:project) { create(:project) }
     let(:cluster) { create(:cluster, projects: [project]) }

spec/models/clusters/applications/runner_spec.rb

@@ -8,6 +8,18 @@ describe Clusters::Applications::Runner do
 
   it { is_expected.to belong_to(:runner) }
 
+  describe '.installed' do
+    subject { described_class.installed }
+
+    let!(:cluster) { create(:clusters_applications_runner, :installed) }
+
+    before do
+      create(:clusters_applications_runner, :errored)
+    end
+
+    it { is_expected.to contain_exactly(cluster) }
+  end
+
   describe '#install_command' do
     let(:kubeclient) { double('kubernetes client') }
     let(:gitlab_runner) { create(:clusters_applications_runner, runner: ci_runner) }