Make KubernetesService readonly

We are deprecating this service in favor of instance wide clusters.
Therefore we removed some code that is not anymore needed for a
readonly cluster and also we added some flags to allow for this
deprecation. These flags are to be removed in the next release when
we finally completelly remove KubernetesService.

.rubocop_todo.yml

@@ -799,7 +799,6 @@ Style/SelfAssignment:
   Exclude:
     - 'app/models/concerns/bulk_member_access_load.rb'
     - 'app/serializers/base_serializer.rb'
-    - 'spec/features/projects/clusters/interchangeability_spec.rb'
     - 'spec/support/import_export/configuration_helper.rb'
 
 # Offense count: 50

app/assets/stylesheets/pages/settings.scss

@@ -340,6 +340,11 @@
 
 .deprecated-service {
   cursor: default;
+
+  a {
+    font-weight: $gl-font-weight-bold;
+    color: $white-light;
+  }
 }
 
 .personal-access-tokens-never-expires-label {

app/helpers/services_helper.rb

@@ -39,7 +39,7 @@ module ServicesHelper
   end
 
   def disable_fields_service?(service)
-    !current_controller?("admin/services") && service.deprecated?
+    service.is_a?(KubernetesService) || (!current_controller?("admin/services") && service.deprecated?)
   end
 
   extend self

app/models/project_services/deployment_service.rb

-# frozen_string_literal: true
-
-# Base class for deployment services
-#
-# These services integrate with a deployment solution like Kubernetes/OpenShift,
-# Mesosphere, etc, to provide additional features to environments.
-class DeploymentService < Service
-  default_value_for :category, 'deployment'
-
-  def self.supported_events
-    %w()
-  end
-
-  def predefined_variables(project:)
-    []
-  end
-
-  # Environments may have a number of terminals. Should return an array of
-  # hashes describing them, e.g.:
-  #
-  #     [{
-  #       :selectors    => {"a" => "b", "foo" => "bar"},
-  #       :url          => "wss://external.example.com/exec",
-  #       :headers      => {"Authorization" => "Token xxx"},
-  #       :subprotocols => ["foo"],
-  #       :ca_pem       => "----BEGIN CERTIFICATE...", # optional
-  #       :created_at   => Time.now.utc
-  #     }]
-  #
-  # Selectors should be a set of values that uniquely identify a particular
-  # terminal
-  def terminals(environment)
-    raise NotImplementedError
-  end
-
-  def can_test?
-    false
-  end
-end

app/models/project_services/kubernetes_service.rb

@@ -5,10 +5,12 @@
 # We'll move this class to Clusters::Platforms::Kubernetes, which contains exactly the same logic.
 # After we've migrated data, we'll remove KubernetesService. This would happen in a few months.
 # If you're modyfiyng this class, please note that you should update the same change in Clusters::Platforms::Kubernetes.
-class KubernetesService < DeploymentService
+class KubernetesService < Service
   include Gitlab::Kubernetes
   include ReactiveCaching
 
+  default_value_for :category, 'deployment'
+
   self.reactive_cache_key = ->(service) { [service.class.model_name.singular, service.project_id] }
 
   # Namespace defaults to the project path, but can be overridden in case that
@@ -32,7 +34,10 @@ class KubernetesService < DeploymentService
 
   before_validation :enforce_namespace_to_lower_case
 
-  validate :deprecation_validation, unless: :template?
+  attr_accessor :skip_deprecation_validation
+
+  validate :deprecation_validation, unless: :skip_deprecation_validation
+
   validates :namespace,
     allow_blank: true,
     length: 1..63,
@@ -44,6 +49,14 @@ class KubernetesService < DeploymentService
 
   after_save :clear_reactive_cache!
 
+  def self.supported_events
+    %w()
+  end
+
+  def can_test?
+    false
+  end
+
   def initialize_properties
     self.properties = {} if properties.nil?
   end
@@ -56,11 +69,6 @@ class KubernetesService < DeploymentService
     'Kubernetes / OpenShift integration'
   end
 
-  def help
-    'To enable terminal access to Kubernetes environments, label your ' \
-    'deployments with `app=$CI_ENVIRONMENT_SLUG`'
-  end
-
   def self.to_param
     'kubernetes'
   end
@@ -153,14 +161,25 @@ class KubernetesService < DeploymentService
   end
 
   def deprecated?
-    !active
+    true
+  end
+
+  def editable?
+    false
   end
 
   def deprecation_message
-    content = _("Kubernetes service integration has been deprecated. %{deprecated_message_content} your Kubernetes clusters using the new <a href=\"%{url}\"/>Kubernetes Clusters</a> page") % {
-      deprecated_message_content: deprecated_message_content,
-      url: Gitlab::Routing.url_helpers.project_clusters_path(project)
-    }
+    content = if project
+                _("Kubernetes service integration has been deprecated. %{deprecated_message_content} your Kubernetes clusters using the new <a href=\"%{url}\"/>Kubernetes Clusters</a> page") % {
+                  deprecated_message_content: deprecated_message_content,
+                  url: Gitlab::Routing.url_helpers.project_clusters_path(project)
+                }
+              else
+                _("The instance-level Kubernetes service integration is deprecated. Your data has been migrated to an <a href=\"%{url}\"/>instance-level cluster</a>.") % {
+                  url: Gitlab::Routing.url_helpers.admin_clusters_path
+                }
+              end
+
     content.html_safe
   end
 
@@ -243,10 +262,6 @@ class KubernetesService < DeploymentService
   end
 
   def deprecated_message_content
-    if active?
-      _("Your Kubernetes cluster information on this page is still editable, but you are advised to disable and reconfigure")
-    else
-      _("Fields on this page are now uneditable, you can configure")
-    end
+    _("Fields on this page are now uneditable, you can configure")
   end
 end

app/models/project_services/mock_deployment_service.rb

 # frozen_string_literal: true
 
-class MockDeploymentService < DeploymentService
+class MockDeploymentService < Service
+  default_value_for :category, 'deployment'
+
   def title
     'Mock deployment'
   end
@@ -17,4 +19,16 @@ class MockDeploymentService < DeploymentService
   def terminals(environment)
     []
   end
+
+  def self.supported_events
+    %w()
+  end
+
+  def predefined_variables(project:)
+    []
+  end
+
+  def can_test?
+    false
+  end
 end

app/views/admin/services/_deprecated_message.html.haml

+.flash-container.flash-container-page
+  .flash-alert.deprecated-service
+    %span= @service.deprecation_message

app/views/admin/services/_form.html.haml

@@ -6,5 +6,6 @@
 = form_for :service, url: admin_application_settings_service_path, method: :put, html: { class: 'fieldset-form' } do |form|
   = render 'shared/service_settings', form: form, subject: @service
 
-  .footer-block.row-content-block
-    = form.submit 'Save', class: 'btn btn-success'
+  - unless @service.is_a?(KubernetesService)
+    .footer-block.row-content-block
+      = form.submit 'Save', class: 'btn btn-success'

app/views/admin/services/edit.html.haml

 - add_to_breadcrumbs "Service Templates", admin_application_settings_services_path
 - breadcrumb_title @service.title
 - page_title @service.title, "Service Templates"
+
+= render 'deprecated_message' if @service.deprecation_message
+
 = render 'form'

changelogs/unreleased/readonly_k8s_integration.yml

+---
+title: Make Kubernetes service templates readonly
+merge_request: 29044
+author:
+type: removed

locale/gitlab.pot

@@ -9999,6 +9999,9 @@ msgstr ""
 msgid "The import will time out after %{timeout}. For repositories that take longer, use a clone/push combination."
 msgstr ""
 
+msgid "The instance-level Kubernetes service integration is deprecated. Your data has been migrated to an <a href=\"%{url}\"/>instance-level cluster</a>."
+msgstr ""
+
 msgid "The invitation could not be accepted."
 msgstr ""
 
@@ -11943,9 +11946,6 @@ msgstr ""
 msgid "Your Groups"
 msgstr ""
 
-msgid "Your Kubernetes cluster information on this page is still editable, but you are advised to disable and reconfigure"
-msgstr ""
-
 msgid "Your Primary Email will be used for avatar detection."
 msgstr ""
 

spec/controllers/projects/branches_controller_spec.rb

@@ -123,7 +123,11 @@ describe Projects::BranchesController do
           expect(response).to redirect_to project_tree_path(project, branch)
         end
 
-        shared_examples 'same behavior between KubernetesService and Platform::Kubernetes' do
+        context 'when user configured kubernetes from CI/CD > Clusters' do
+          before do
+            create(:cluster, :provided_by_gcp, projects: [project])
+          end
+
           it 'redirects to autodeploy setup page' do
             result = { status: :success, branch: double(name: branch) }
 
@@ -143,22 +147,6 @@ describe Projects::BranchesController do
           end
         end
 
-        context 'when user configured kubernetes from Integration > Kubernetes' do
-          before do
-            project.services << build(:kubernetes_service)
-          end
-
-          it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-        end
-
-        context 'when user configured kubernetes from CI/CD > Clusters' do
-          before do
-            create(:cluster, :provided_by_gcp, projects: [project])
-          end
-
-          it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-        end
-
         it 'redirects to autodeploy setup page' do
           result = { status: :success, branch: double(name: branch) }
 

spec/controllers/projects/services_controller_spec.rb

@@ -141,20 +141,6 @@ describe Projects::ServicesController do
       end
     end
 
-    context 'with a deprecated service' do
-      let(:service) { create(:kubernetes_service, project: project) }
-
-      before do
-        put :update,
-          params: { namespace_id: project.namespace, project_id: project, id: service.to_param, service: { namespace: 'updated_namespace' } }
-      end
-
-      it 'does not update the service' do
-        service.reload
-        expect(service.namespace).not_to eq('updated_namespace')
-      end
-    end
-
     context 'when activating JIRA service from a template' do
       let(:template_service) { create(:jira_service, project: project, template: true) }
 
@@ -168,20 +154,10 @@ describe Projects::ServicesController do
 
   describe "GET #edit" do
     before do
-      get :edit, params: { namespace_id: project.namespace, project_id: project, id: service_id }
+      get :edit, params: { namespace_id: project.namespace, project_id: project, id: 'jira' }
     end
 
     context 'with approved services' do
-      let(:service_id) { 'jira' }
-
-      it 'renders edit page' do
-        expect(response).to be_success
-      end
-    end
-
-    context 'with a deprecated service' do
-      let(:service_id) { 'kubernetes' }
-
       it 'renders edit page' do
         expect(response).to be_success
       end

spec/factories/services.rb

@@ -24,6 +24,8 @@ FactoryBot.define do
       api_url: 'https://kubernetes.example.com',
       token: 'a' * 40
     })
+
+    skip_deprecation_validation true
   end
 
   factory :mock_deployment_service do

spec/features/projects/clusters/interchangeability_spec.rb

-require 'spec_helper'
-
-describe 'Interchangeability between KubernetesService and Platform::Kubernetes' do
-  EXCEPT_METHODS = %i[test title description help fields initialize_properties namespace namespace= api_url api_url= deprecated? deprecation_message].freeze
-  EXCEPT_METHODS_GREP_V = %w[_touched? _changed? _was].freeze
-
-  it 'Clusters::Platform::Kubernetes covers core interfaces in KubernetesService' do
-    expected_interfaces = KubernetesService.instance_methods(false)
-    expected_interfaces = expected_interfaces - EXCEPT_METHODS
-    EXCEPT_METHODS_GREP_V.each do |g|
-      expected_interfaces = expected_interfaces.grep_v(/#{Regexp.escape(g)}\z/)
-    end
-
-    expect(expected_interfaces - Clusters::Platforms::Kubernetes.instance_methods).to be_empty
-  end
-end

spec/features/projects/environments/environment_spec.rb

@@ -155,7 +155,10 @@ describe 'Environment' do
           end
 
           context 'with terminal' do
-            shared_examples 'same behavior between KubernetesService and Platform::Kubernetes' do
+            context 'when user configured kubernetes from CI/CD > Clusters' do
+              let!(:cluster) { create(:cluster, :project, :provided_by_gcp) }
+              let(:project) { cluster.project }
+
               context 'for project maintainer' do
                 let(:role) { :maintainer }
 
@@ -191,19 +194,6 @@ describe 'Environment' do
                 end
               end
             end
-
-            context 'when user configured kubernetes from Integration > Kubernetes' do
-              let(:project) { create(:kubernetes_project, :test_repo) }
-
-              it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-            end
-
-            context 'when user configured kubernetes from CI/CD > Clusters' do
-              let!(:cluster) { create(:cluster, :project, :provided_by_gcp) }
-              let(:project) { cluster.project }
-
-              it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-            end
           end
 
           context 'when environment is available' do

spec/features/projects/environments/environments_spec.rb

@@ -248,7 +248,10 @@ describe 'Environments page', :js do
         end
 
         context 'when kubernetes terminal is available' do
-          shared_examples 'same behavior between KubernetesService and Platform::Kubernetes' do
+          context 'when user configured kubernetes from CI/CD > Clusters' do
+            let(:cluster) { create(:cluster, :provided_by_gcp, projects: [create(:project, :repository)]) }
+            let(:project) { cluster.project }
+
             context 'for project maintainer' do
               let(:role) { :maintainer }
 
@@ -265,19 +268,6 @@ describe 'Environments page', :js do
               end
             end
           end
-
-          context 'when user configured kubernetes from Integration > Kubernetes' do
-            let(:project) { create(:kubernetes_project, :test_repo) }
-
-            it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-          end
-
-          context 'when user configured kubernetes from CI/CD > Clusters' do
-            let(:cluster) { create(:cluster, :provided_by_gcp, projects: [create(:project, :repository)]) }
-            let(:project) { cluster.project }
-
-            it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-          end
         end
       end
 

spec/lib/gitlab/ci/build/policy/kubernetes_spec.rb

@@ -4,24 +4,14 @@ describe Gitlab::Ci::Build::Policy::Kubernetes do
   let(:pipeline) { create(:ci_pipeline, project: project) }
 
   context 'when kubernetes service is active' do
-    shared_examples 'same behavior between KubernetesService and Platform::Kubernetes' do
-      it 'is satisfied by a kubernetes pipeline' do
-        expect(described_class.new('active'))
-          .to be_satisfied_by(pipeline)
-      end
-    end
-
-    context 'when user configured kubernetes from Integration > Kubernetes' do
-      let(:project) { create(:kubernetes_project) }
-
-      it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-    end
-
     context 'when user configured kubernetes from CI/CD > Clusters' do
       let!(:cluster) { create(:cluster, :project, :provided_by_gcp) }
       let(:project) { cluster.project }
 
-      it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
+      it 'is satisfied by a kubernetes pipeline' do
+        expect(described_class.new('active'))
+          .to be_satisfied_by(pipeline)
+      end
     end
   end
 

spec/models/ci/pipeline_spec.rb

@@ -962,7 +962,11 @@ describe Ci::Pipeline, :mailer do
         end
 
         context 'when kubernetes is active' do
-          shared_examples 'same behavior between KubernetesService and Platform::Kubernetes' do
+          context 'when user configured kubernetes from CI/CD > Clusters' do
+            let!(:cluster) { create(:cluster, :project, :provided_by_gcp) }
+            let(:project) { cluster.project }
+            let(:pipeline) { build(:ci_pipeline, project: project, config: config) }
+
             it 'returns seeds for kubernetes dependent job' do
               seeds = pipeline.stage_seeds
 
@@ -971,21 +975,6 @@ describe Ci::Pipeline, :mailer do
               expect(seeds.dig(1, 0, :name)).to eq 'production'
             end
           end
-
-          context 'when user configured kubernetes from Integration > Kubernetes' do
-            let(:project) { create(:kubernetes_project) }
-            let(:pipeline) { build(:ci_pipeline, project: project, config: config) }
-
-            it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-          end
-
-          context 'when user configured kubernetes from CI/CD > Clusters' do
-            let!(:cluster) { create(:cluster, :project, :provided_by_gcp) }
-            let(:project) { cluster.project }
-            let(:pipeline) { build(:ci_pipeline, project: project, config: config) }
-
-            it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-          end
         end
 
         context 'when kubernetes is not active' do
@@ -1679,23 +1668,13 @@ describe Ci::Pipeline, :mailer do
 
   describe '#has_kubernetes_active?' do
     context 'when kubernetes is active' do
-      shared_examples 'same behavior between KubernetesService and Platform::Kubernetes' do
-        it 'returns true' do
-          expect(pipeline).to have_kubernetes_active
-        end
-      end
-
-      context 'when user configured kubernetes from Integration > Kubernetes' do
-        let(:project) { create(:kubernetes_project) }
-
-        it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-      end
-
       context 'when user configured kubernetes from CI/CD > Clusters' do
         let!(:cluster) { create(:cluster, :project, :provided_by_gcp) }
         let(:project) { cluster.project }
 
-        it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
+        it 'returns true' do
+          expect(pipeline).to have_kubernetes_active
+        end
       end
     end
 

spec/models/environment_spec.rb

@@ -515,29 +515,19 @@ describe Environment do
 
     context 'when the environment is available' do
       context 'with a deployment service' do
-        shared_examples 'same behavior between KubernetesService and Platform::Kubernetes' do
-          context 'and a deployment' do
+        context 'when user configured kubernetes from CI/CD > Clusters' do
+          let!(:cluster) { create(:cluster, :project, :provided_by_gcp) }
+          let(:project) { cluster.project }
+
+          context 'with deployment' do
             let!(:deployment) { create(:deployment, :success, environment: environment) }
             it { is_expected.to be_truthy }
           end
 
-          context 'but no deployments' do
+          context 'without deployments' do
             it { is_expected.to be_falsy }
           end
         end
-
-        context 'when user configured kubernetes from Integration > Kubernetes' do
-          let(:project) { create(:kubernetes_project) }
-
-          it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-        end
-
-        context 'when user configured kubernetes from CI/CD > Clusters' do
-          let!(:cluster) { create(:cluster, :project, :provided_by_gcp) }
-          let(:project) { cluster.project }
-
-          it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-        end
       end
 
       context 'without a deployment service' do
@@ -546,8 +536,6 @@ describe Environment do
     end
 
     context 'when the environment is unavailable' do
-      let(:project) { create(:kubernetes_project) }
-
       before do
         environment.stop
       end
@@ -590,7 +578,10 @@ describe Environment do
         allow(environment).to receive(:has_terminals?).and_return(true)
       end
 
-      shared_examples 'same behavior between KubernetesService and Platform::Kubernetes' do
+      context 'when user configured kubernetes from CI/CD > Clusters' do
+        let!(:cluster) { create(:cluster, :project, :provided_by_gcp) }
+        let(:project) { cluster.project }
+
         it 'returns the terminals from the deployment service' do
           expect(environment.deployment_platform)
             .to receive(:terminals).with(environment)
@@ -599,19 +590,6 @@ describe Environment do
           is_expected.to eq(:fake_terminals)
         end
       end
-
-      context 'when user configured kubernetes from Integration > Kubernetes' do
-        let(:project) { create(:kubernetes_project) }
-
-        it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-      end
-
-      context 'when user configured kubernetes from CI/CD > Clusters' do
-        let!(:cluster) { create(:cluster, :project, :provided_by_gcp) }
-        let(:project) { cluster.project }
-
-        it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-      end
     end
 
     context 'when the environment does not have terminals' do

spec/models/project_services/kubernetes_service_spec.rb

@@ -17,6 +17,7 @@ describe KubernetesService, :use_clean_rails_memory_store_caching do
     context 'when service is active' do
       before do
         subject.active = true
+        subject.skip_deprecation_validation = true
       end
 
       it { is_expected.not_to validate_presence_of(:namespace) }
@@ -67,6 +68,7 @@ describe KubernetesService, :use_clean_rails_memory_store_caching do
 
       before do
         kubernetes_service.update_attribute(:active, false)
+        kubernetes_service.skip_deprecation_validation = false
         kubernetes_service.properties['namespace'] = "foo"
       end
 
@@ -80,19 +82,11 @@ describe KubernetesService, :use_clean_rails_memory_store_caching do
       end
     end
 
-    context 'with a non-deprecated service' do
-      let(:kubernetes_service) { create(:kubernetes_service) }
-
-      it 'updates attributes' do
-        kubernetes_service.properties['namespace'] = 'foo'
-        expect(kubernetes_service.save).to be_truthy
-      end
-    end
-
     context 'with an active and deprecated service' do
       let(:kubernetes_service) { create(:kubernetes_service) }
 
       before do
+        kubernetes_service.skip_deprecation_validation = false
         kubernetes_service.active = false
         kubernetes_service.properties['namespace'] = 'foo'
         kubernetes_service.save
@@ -110,19 +104,6 @@ describe KubernetesService, :use_clean_rails_memory_store_caching do
         expect(kubernetes_service.properties['namespace']).to eq("foo")
       end
     end
-
-    context 'with a template service' do
-      let(:kubernetes_service) { create(:kubernetes_service, template: true, active: false) }
-
-      before do
-        kubernetes_service.properties['namespace'] = 'foo'
-      end
-
-      it 'updates attributes' do
-        expect(kubernetes_service.save).to be_truthy
-        expect(kubernetes_service.properties['namespace']).to eq('foo')
-      end
-    end
   end
 
   describe '#initialize_properties' do
@@ -393,17 +374,8 @@ describe KubernetesService, :use_clean_rails_memory_store_caching do
   describe "#deprecated?" do
     let(:kubernetes_service) { create(:kubernetes_service) }
 
-    context 'with an active kubernetes service' do
-      it 'returns false' do
-        expect(kubernetes_service.deprecated?).to be_falsy
-      end
-    end
-
-    context 'with a inactive kubernetes service' do
-      it 'returns true' do
-        kubernetes_service.update_attribute(:active, false)
-        expect(kubernetes_service.deprecated?).to be_truthy
-      end
+    it 'returns true' do
+      expect(kubernetes_service.deprecated?).to be_truthy
     end
   end
 
@@ -414,12 +386,6 @@ describe KubernetesService, :use_clean_rails_memory_store_caching do
       expect(kubernetes_service.deprecation_message).to match(/Kubernetes service integration has been deprecated/)
     end
 
-    context 'if the services is active' do
-      it 'returns a message' do
-        expect(kubernetes_service.deprecation_message).to match(/Your Kubernetes cluster information on this page is still editable/)
-      end
-    end
-
     context 'if the service is not active' do
       it 'returns a message' do
         kubernetes_service.update_attribute(:active, false)

spec/models/project_spec.rb

@@ -2652,7 +2652,10 @@ describe Project do
     end
 
     context 'when project has a deployment service' do
-      shared_examples 'same behavior between KubernetesService and Platform::Kubernetes' do
+      context 'when user configured kubernetes from CI/CD > Clusters and KubernetesNamespace migration has not been executed' do
+        let!(:cluster) { create(:cluster, :project, :provided_by_gcp) }
+        let(:project) { cluster.project }
+
         it 'returns variables from this service' do
           expect(project.deployment_variables).to include(
             { key: 'KUBE_TOKEN', value: project.deployment_platform.token, public: false, masked: true }
@@ -2660,19 +2663,6 @@ describe Project do
         end
       end
 
-      context 'when user configured kubernetes from Integration > Kubernetes' do
-        let(:project) { create(:kubernetes_project) }
-
-        it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-      end
-
-      context 'when user configured kubernetes from CI/CD > Clusters and KubernetesNamespace migration has not been executed' do
-        let!(:cluster) { create(:cluster, :project, :provided_by_gcp) }
-        let(:project) { cluster.project }
-
-        it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-      end
-
       context 'when user configured kubernetes from CI/CD > Clusters and KubernetesNamespace migration has been executed' do
         let!(:kubernetes_namespace) { create(:cluster_kubernetes_namespace, :with_token) }
         let!(:cluster) { kubernetes_namespace.cluster }

spec/models/service_spec.rb

@@ -82,7 +82,7 @@ describe Service do
       context 'when template is invalid' do
         it 'sets service template to inactive when template is invalid' do
           project = create(:project)
-          template = KubernetesService.new(template: true, active: true)
+          template = build(:prometheus_service, template: true, active: true, properties: {})
           template.save(validate: false)
 
           service = described_class.build_from_template(project.id, template)
@@ -309,10 +309,10 @@ describe Service do
   end
 
   describe '.find_by_template' do
-    let!(:kubernetes_service) { create(:kubernetes_service, template: true) }
+    let!(:service) { create(:service, template: true) }
 
     it 'returns service template' do
-      expect(KubernetesService.find_by_template).to eq(kubernetes_service)
+      expect(described_class.find_by_template).to eq(service)
     end
   end
 

spec/requests/api/services_spec.rb

@@ -10,7 +10,10 @@ describe API::Services do
   end
 
   Service.available_services_names.each do |service|
-    describe "PUT /projects/:id/services/#{service.dasherize}" do
+    # TODO: Remove below `if: (service != "kubernetes")` in the next release
+    # KubernetesService was deprecated and it can't be updated. Right now it's
+    # only readable. It should be completely removed in the next iteration.
+    describe "PUT /projects/:id/services/#{service.dasherize}", if: (service != "kubernetes") do
       include_context service
 
       it "updates #{service} settings" do
@@ -59,7 +62,10 @@ describe API::Services do
       end
     end
 
-    describe "DELETE /projects/:id/services/#{service.dasherize}" do
+    # TODO: Remove below `if: (service != "kubernetes")` in the next release
+    # KubernetesService was deprecated and it can't be updated. Right now it's
+    # only readable. It should be completely removed in the next iteration.
+    describe "DELETE /projects/:id/services/#{service.dasherize}", if: (service != "kubernetes") do
       include_context service
 
       before do

spec/serializers/environment_entity_spec.rb

@@ -59,15 +59,5 @@ describe EnvironmentEntity do
         expect(subject[:cluster_type]).to eq('project_type')
       end
     end
-
-    context 'when deployment platform is a Kubernetes Service' do
-      before do
-        create(:kubernetes_service, project: project)
-      end
-
-      it 'does not include cluster_type' do
-        expect(subject).not_to include(:cluster_type)
-      end
-    end
   end
 end

spec/support/prometheus/additional_metrics_shared_examples.rb

@@ -44,7 +44,9 @@ RSpec.shared_examples 'additional metrics query' do
     end
 
     describe 'project has Kubernetes service' do
-      shared_examples 'same behavior between KubernetesService and Platform::Kubernetes' do
+      context 'when user configured kubernetes from CI/CD > Clusters' do
+        let!(:cluster) { create(:cluster, :project, :provided_by_gcp) }
+        let(:project) { cluster.project }
         let(:environment) { create(:environment, slug: 'environment-slug', project: project) }
         let(:kube_namespace) { project.deployment_platform.kubernetes_namespace_for(project) }
 
@@ -56,19 +58,6 @@ RSpec.shared_examples 'additional metrics query' do
           subject.query(*query_params)
         end
       end
-
-      context 'when user configured kubernetes from Integration > Kubernetes' do
-        let(:project) { create(:kubernetes_project) }
-
-        it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-      end
-
-      context 'when user configured kubernetes from CI/CD > Clusters' do
-        let!(:cluster) { create(:cluster, :project, :provided_by_gcp) }
-        let(:project) { cluster.project }
-
-        it_behaves_like 'same behavior between KubernetesService and Platform::Kubernetes'
-      end
     end
 
     describe 'project without Kubernetes service' do

spec/support/shared_contexts/services_shared_context.rb

@@ -37,8 +37,7 @@ Service.available_services_names.each do |service|
     def initialize_service(service)
       service_item = project.find_or_initialize_service(service)
       service_item.properties = service_attrs
-      service_item.active = true if service == "kubernetes"
-      service_item.save
+      service_item.save!
       service_item
     end
   end

spec/workers/reactive_caching_worker_spec.rb

@@ -6,16 +6,6 @@ describe ReactiveCachingWorker do
   let(:service) { project.deployment_platform }
 
   describe '#perform' do
-    context 'when user configured kubernetes from Integration > Kubernetes' do
-      let(:project) { create(:kubernetes_project) }
-
-      it 'calls #exclusively_update_reactive_cache!' do
-        expect_any_instance_of(KubernetesService).to receive(:exclusively_update_reactive_cache!)
-
-        described_class.new.perform("KubernetesService", service.id)
-      end
-    end
-
     context 'when user configured kubernetes from CI/CD > Clusters' do
       let!(:cluster) { create(:cluster, :project, :provided_by_gcp) }
       let(:project) { cluster.project }