This works

19 files changed, 235 insertions, 162 deletions

diff --git a/app/controllers/projects/clusters_controller.rb b/app/controllers/projects/clusters_controller.rb
index 0679d8c69f0..c07d955f148 100644
--- a/app/controllers/projects/clusters_controller.rb
+++ b/app/controllers/projects/clusters_controller.rb
@@ -27,11 +27,17 @@ class Projects::ClustersController < Projects::ApplicationController
   end
 
   def new
-    @cluster = project.build_cluster
+    @cluster = Clusters::Cluster.new(
+      platform_type: :kubernetes,
+      provider_type: :gcp).tap do |cluster|
+      cluster.build_provider_gcp
+      cluster.build_platform_kubernetes
+      cluster.projects << project
+    end
   end
 
   def create
-    @cluster = Ci::CreateService
+    @cluster = Clusters::CreateService
       .new(project, current_user, create_params)
       .execute(token_in_session)
 
@@ -58,7 +64,7 @@ class Projects::ClustersController < Projects::ApplicationController
   end
 
   def update
-    Ci::UpdateClusterService
+    Clusters::UpdateService
       .new(project, current_user, update_params)
       .execute(cluster)
 
@@ -89,16 +95,16 @@ class Projects::ClustersController < Projects::ApplicationController
   def create_params
     params.require(:cluster).permit(
       :enabled,
+      :name,
       :platform_type,
       :provider_type,
-      kubernetes_platform: [
+      platform_kubernetes_attributes: [
         :namespace
       ],
-      gcp_provider: [
-        :project_id,
-        :cluster_zone,
-        :cluster_name,
-        :cluster_size,
+      provider_gcp_attributes: [
+        :gcp_project_id,
+        :zone,
+        :num_nodes,
         :machine_type
       ])
   end
@@ -106,7 +112,7 @@ class Projects::ClustersController < Projects::ApplicationController
   def update_params
     params.require(:cluster).permit(
       :enabled,
-      kubernetes_platform: [
+      platform_kubernetes_attributes: [
         :namespace
       ])
   end
diff --git a/app/models/clusters/cluster.rb b/app/models/clusters/cluster.rb
index d7b13ac88f2..f1eedad8795 100644
--- a/app/models/clusters/cluster.rb
+++ b/app/models/clusters/cluster.rb
@@ -2,49 +2,46 @@ module Clusters
   class Cluster < ActiveRecord::Base
     include Presentable
 
+    self.table_name = 'clusters'
+
     belongs_to :user
-    belongs_to :service
 
-    enum :platform_type {
+    enum platform_type: {
       kubernetes: 1
     }
 
-    enum :provider_type {
+    enum provider_type: {
       user: 0,
       gcp: 1
     }
 
-    has_many :cluster_projects
-    has_many :projects, through: :cluster_projects
+    has_many :cluster_projects, class_name: 'Clusters::Project'
+    has_many :projects, through: :cluster_projects, class_name: '::Project'
 
-    has_one :gcp_provider
-    has_one :kubernetes_platform
+    has_one :provider_gcp, class_name: 'Clusters::Providers::Gcp'
+    has_one :platform_kubernetes, class_name: 'Clusters::Platforms::Kubernetes'
 
-    accepts_nested_attributes_for :gcp_provider
-    accepts_nested_attributes_for :kubernetes_platform
+    accepts_nested_attributes_for :provider_gcp
+    accepts_nested_attributes_for :platform_kubernetes
 
-    validates :kubernetes_platform, presence: true, if: :kubernetes?
-    validates :gcp_provider, presence: true, if: :gcp?
+    validates :name, cluster_name: true
     validate :restrict_modification, on: :update
 
     delegate :status, to: :provider, allow_nil: true
     delegate :status_reason, to: :provider, allow_nil: true
-
-    def restrict_modification
-      if provider&.on_creation?
-        errors.add(:base, "cannot modify during creation")
-        return false
-      end
-
-      true
-    end
+    delegate :status_name, to: :provider, allow_nil: true
+    delegate :on_creation?, to: :provider, allow_nil: true
 
     def provider
-      return gcp_provider if gcp?
+      return provider_gcp if gcp?
     end
 
     def platform
-      return kubernetes_platform if kubernetes?
+      return platform_kubernetes if kubernetes?
+    end
+
+    def project
+      first_project
     end
 
     def first_project
@@ -52,5 +49,16 @@ module Clusters
 
       @first_project = projects.first
     end
+
+    private
+
+    def restrict_modification
+      if provider&.on_creation?
+        errors.add(:base, "cannot modify during creation")
+        return false
+      end
+
+      true
+    end
   end
 end
diff --git a/app/models/clusters/cluster_project.rb b/app/models/clusters/cluster_project.rb
deleted file mode 100644
index 7b139c2bb08..00000000000
--- a/app/models/clusters/cluster_project.rb
+++ /dev/null
@@ -1,6 +0,0 @@
-module Clusters
-  class ClusterProject < ActiveRecord::Base
-    belongs_to :cluster
-    belongs_to :project
-  end
-end
diff --git a/app/models/clusters/platforms/kubernetes.rb b/app/models/clusters/platforms/kubernetes.rb
index aed6f733487..d9f8927f7cc 100644
--- a/app/models/clusters/platforms/kubernetes.rb
+++ b/app/models/clusters/platforms/kubernetes.rb
@@ -4,11 +4,13 @@ module Clusters
       include Gitlab::Kubernetes
       include ReactiveCaching
 
+      self.table_name = 'cluster_platforms_kubernetes'
+
       TEMPLATE_PLACEHOLDER = 'Kubernetes namespace'.freeze
 
-      self.reactive_cache_key = ->(service) { [service.class.model_name.singular, service.project_id] }
+      self.reactive_cache_key = ->(kubernetes) { [kubernetes.class.model_name.singular, kubernetes.cluster_id] }
 
-      belongs_to :cluster
+      belongs_to :cluster, inverse_of: :platform_kubernetes, class_name: 'Clusters::Cluster'
 
       attr_encrypted :password,
         mode: :per_attribute_iv,
@@ -28,8 +30,8 @@ module Clusters
           message: Gitlab::Regex.kubernetes_namespace_regex_message
         }
 
-      validates :api_url, url: true, presence: true
-      validates :token, presence: true
+      validates :api_url, url: true, presence: true, on: :update
+      validates :token, presence: true, on: :update
 
       after_save :clear_reactive_cache!
       
@@ -53,9 +55,9 @@ module Clusters
           { key: 'KUBECONFIG', value: config, public: false, file: true }
         ]
 
-        if ca_pem.present?
-          variables << { key: 'KUBE_CA_PEM', value: ca_pem, public: true }
-          variables << { key: 'KUBE_CA_PEM_FILE', value: ca_pem, public: true, file: true }
+        if ca_cert.present?
+          variables << { key: 'KUBE_CA_PEM', value: ca_cert, public: true }
+          variables << { key: 'KUBE_CA_PEM_FILE', value: ca_cert, public: true, file: true }
         end
 
         variables
@@ -76,7 +78,7 @@ module Clusters
       # Caches resources in the namespace so other calls don't need to block on
       # network access
       def calculate_reactive_cache
-        return unless active? && project && !project.pending_delete?
+        return unless active? && cluster.project && !cluster.project.pending_delete?
 
         # We may want to cache extra things in the future
         { pods: read_pods }
@@ -87,15 +89,16 @@ module Clusters
           url: api_url,
           namespace: actual_namespace,
           token: token,
-          ca_pem: ca_pem)
+          ca_pem: ca_cert)
       end
 
       def namespace_placeholder
         default_namespace || TEMPLATE_PLACEHOLDER
       end
 
-      def default_namespace
-        "#{cluster.first_project.path}-#{cluster.first_project.id}" if cluster.first_project
+      def default_namespace(project = nil)
+        project ||= cluster&.project
+        "#{project.path}-#{project.id}" if project
       end
 
       def read_secrets
@@ -120,9 +123,9 @@ module Clusters
       def kubeclient_ssl_options
         opts = { verify_ssl: OpenSSL::SSL::VERIFY_PEER }
 
-        if ca_pem.present?
+        if ca_cert.present?
           opts[:cert_store] = OpenSSL::X509::Store.new
-          opts[:cert_store].add_cert(OpenSSL::X509::Certificate.new(ca_pem))
+          opts[:cert_store].add_cert(OpenSSL::X509::Certificate.new(ca_cert))
         end
 
         opts
@@ -131,7 +134,11 @@ module Clusters
       private
 
       def build_kubeclient!(api_path: 'api', api_version: 'v1')
-        raise "Incomplete settings" unless api_url && actual_namespace && token
+        raise "Incomplete settings" unless api_url && actual_namespace
+
+        unless (username && password) || token
+          raise "Either username/password or token is required to access API"
+        end
 
         ::Kubeclient::Client.new(
           join_api_url(api_path),
@@ -143,7 +150,7 @@ module Clusters
       end
 
       def kubeclient_auth_options
-        return { username: username, password: password } if username
+        return { username: username, password: password } if username && password
         return { bearer_token: token } if token
       end
 
@@ -159,7 +166,7 @@ module Clusters
       def terminal_auth
         {
           token: token,
-          ca_pem: ca_pem,
+          ca_pem: ca_cert,
           max_session_time: current_application_settings.terminal_max_session_time
         }
       end
diff --git a/app/models/clusters/project.rb b/app/models/clusters/project.rb
new file mode 100644
index 00000000000..69088100420
--- /dev/null
+++ b/app/models/clusters/project.rb
@@ -0,0 +1,8 @@
+module Clusters
+  class Project < ActiveRecord::Base
+    self.table_name = 'cluster_projects'
+
+    belongs_to :cluster, inverse_of: :projects, class_name: 'Clusters::Cluster'
+    belongs_to :project, inverse_of: :project, class_name: 'Project'
+  end
+end
diff --git a/app/models/clusters/providers/gcp.rb b/app/models/clusters/providers/gcp.rb
index 5d4618cfe87..e4f109d2794 100644
--- a/app/models/clusters/providers/gcp.rb
+++ b/app/models/clusters/providers/gcp.rb
@@ -1,10 +1,12 @@
 module Clusters
   module Providers
     class Gcp < ActiveRecord::Base
-      belongs_to :cluster
+      self.table_name = 'cluster_providers_gcp'
 
-      default_value_for :cluster_zone, 'us-central1-a'
-      default_value_for :cluster_size, 3
+      belongs_to :cluster, inverse_of: :provider_gcp, class_name: 'Clusters::Cluster'
+
+      default_value_for :zone, 'us-central1-a'
+      default_value_for :num_nodes, 3
       default_value_for :machine_type, 'n1-standard-4'
 
       attr_encrypted :access_token,
@@ -12,23 +14,16 @@ module Clusters
         key: Gitlab::Application.secrets.db_key_base,
         algorithm: 'aes-256-cbc'
 
-      validates :project_id,
+      validates :gcp_project_id,
         length: 1..63,
         format: {
           with: Gitlab::Regex.kubernetes_namespace_regex,
           message: Gitlab::Regex.kubernetes_namespace_regex_message
         }
 
-      validates :cluster_name,
-        length: 1..63,
-        format: {
-          with: Gitlab::Regex.kubernetes_namespace_regex,
-          message: Gitlab::Regex.kubernetes_namespace_regex_message
-        }
-
-      validates :cluster_zone, presence: true
+      validates :zone, presence: true
 
-      validates :cluster_size,
+      validates :num_nodes,
         presence: true,
         numericality: {
           only_integer: true,
@@ -54,9 +49,13 @@ module Clusters
         end
 
         before_transition any => [:errored, :created] do |provider|
-          provider.token = nil
+          provider.access_token = nil
           provider.operation_id = nil
-          provider.save!
+        end
+
+        before_transition any => [:creating] do |provider, transition|
+          operation_id = transition.args.first
+          provider.operation_id = operation_id if operation_id
         end
 
         before_transition any => [:errored] do |provider, transition|
diff --git a/app/models/project.rb b/app/models/project.rb
index bc263b63881..70c75edcda3 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -178,8 +178,8 @@ class Project < ActiveRecord::Base
   has_one :project_feature, inverse_of: :project
   has_one :statistics, class_name: 'ProjectStatistics'
 
-  has_many :cluster_projects, class_name: 'Clusters::ClusterProject'
-  has_one :cluster, through: :cluster_projects
+  has_one :cluster_project, class_name: 'Clusters::Project'
+  has_one :cluster, through: :cluster_project, class_name: 'Clusters::Cluster'
 
   # Container repositories need to remove data from the container registry,
   # which is not managed by the DB. Hence we're still using dependent: :destroy
diff --git a/app/policies/gcp/cluster_policy.rb b/app/policies/clusters/cluster_policy.rb
index e77173ea6e1..1f7c13072b9 100644
--- a/app/policies/gcp/cluster_policy.rb
+++ b/app/policies/clusters/cluster_policy.rb
@@ -1,8 +1,8 @@
-module Gcp
+module Clusters
   class ClusterPolicy < BasePolicy
     alias_method :cluster, :subject
 
-    delegate { @subject.project }
+    delegate { cluster.project }
 
     rule { can?(:master_access) }.policy do
       enable :update_cluster
diff --git a/app/presenters/gcp/cluster_presenter.rb b/app/presenters/clusters/cluster_presenter.rb
index f7908f92a37..01cb59d0d44 100644
--- a/app/presenters/gcp/cluster_presenter.rb
+++ b/app/presenters/clusters/cluster_presenter.rb
@@ -1,9 +1,9 @@
-module Gcp
+module Clusters
   class ClusterPresenter < Gitlab::View::Presenter::Delegated
     presents :cluster
 
     def gke_cluster_url
-      "https://console.cloud.google.com/kubernetes/clusters/details/#{gcp_cluster_zone}/#{gcp_cluster_name}"
+      "https://console.cloud.google.com/kubernetes/clusters/details/#{provider.zone}/#{name}" if gcp?
     end
   end
 end
diff --git a/app/services/clusters/create_service.rb b/app/services/clusters/create_service.rb
index 5429bc21256..3f458e25c14 100644
--- a/app/services/clusters/create_service.rb
+++ b/app/services/clusters/create_service.rb
@@ -1,14 +1,39 @@
 module Clusters
   class CreateService < BaseService
-    def execute(access_token)
-      params['gcp_machine_type'] ||= GoogleApi::CloudPlatform::Client::DEFAULT_MACHINE_TYPE
+    attr_reader :access_token
 
-      cluster_params =
-        params.merge(user: current_user)
+    def execute(access_token)
+      @access_token = access_token
 
-      project.create_cluster(cluster_params).tap do |cluster|
+      create_cluster.tap do |cluster|
         ClusterProvisionWorker.perform_async(cluster.id) if cluster.persisted?
       end
     end
+
+    private
+
+    def create_cluster
+      cluster = nil
+
+      ActiveRecord::Base.transaction do
+        cluster = Clusters::Cluster.create!(cluster_params)
+        cluster.projects << project
+      end
+
+      cluster
+    rescue ActiveRecord::RecordInvalid => e
+      e.record
+    end
+
+    def cluster_params
+      return @cluster_params if defined?(@cluster_params)
+
+      params[:provider_gcp_attributes][:machine_type] ||=
+        GoogleApi::CloudPlatform::Client::DEFAULT_MACHINE_TYPE
+
+      params[:provider_gcp_attributes][:access_token] ||= access_token
+
+      @cluster_params = params.merge(user: current_user)
+    end
   end
 end
diff --git a/app/services/clusters/gcp/fetch_operation_service.rb b/app/services/clusters/gcp/fetch_operation_service.rb
index 013225efac4..a4cd3ca5c11 100644
--- a/app/services/clusters/gcp/fetch_operation_service.rb
+++ b/app/services/clusters/gcp/fetch_operation_service.rb
@@ -3,13 +3,13 @@ module Clusters
     class FetchOperationService
       def execute(provider)
         operation = provider.api_client.projects_zones_operations(
-          provider.project_id,
-          provider.cluster_zone,
+          provider.gcp_project_id,
+          provider.zone,
           provider.operation_id)
 
         yield(operation) if block_given?
       rescue Google::Apis::ServerError, Google::Apis::ClientError, Google::Apis::AuthorizationError => e
-        return provider.make_errored!("Failed to request to CloudPlatform; #{e.message}")
+        provider.make_errored!("Failed to request to CloudPlatform; #{e.message}")
       end
     end
   end
diff --git a/app/services/clusters/gcp/finalize_creation_service.rb b/app/services/clusters/gcp/finalize_creation_service.rb
index b536285b368..9f257bd0e9a 100644
--- a/app/services/clusters/gcp/finalize_creation_service.rb
+++ b/app/services/clusters/gcp/finalize_creation_service.rb
@@ -7,15 +7,14 @@ module Clusters
         @provider = provider
 
         configure_provider
-        configure_kubernetes_platform
-        request_kuberenetes_platform_token
+        configure_kubernetes
 
         ActiveRecord::Base.transaction do
-          kubernetes_platform.update!
+          kubernetes.save!
           provider.make_created!
         end
       rescue Google::Apis::ServerError, Google::Apis::ClientError, Google::Apis::AuthorizationError => e
-        return cluster.make_errored!("Failed to request to CloudPlatform; #{e.message}")
+        cluster.make_errored!("Failed to request to CloudPlatform; #{e.message}")
       rescue ActiveRecord::RecordInvalid => e
         cluster.make_errored!("Failed to configure GKE Cluster: #{e.message}")
       end
@@ -26,23 +25,20 @@ module Clusters
         provider.endpoint = gke_cluster.endpoint
       end
 
-      def configure_kubernetes_platform
-        kubernetes_platform = cluster.kubernetes_platform
-        kubernetes_platform.api_url = 'https://' + endpoint
-        kubernetes_platform.ca_cert = Base64.decode64(gke_cluster.master_auth.cluster_ca_certificate)
-        kubernetes_platform.username = gke_cluster.master_auth.username
-        kubernetes_platform.password = gke_cluster.master_auth.password
+      def configure_kubernetes
+        kubernetes.api_url = 'https://' + gke_cluster.endpoint
+        kubernetes.ca_cert = Base64.decode64(gke_cluster.master_auth.cluster_ca_certificate)
+        kubernetes.username = gke_cluster.master_auth.username
+        kubernetes.password = gke_cluster.master_auth.password
+        kubernetes.token = request_kuberenetes_token
       end
 
-      def request_kuberenetes_platform_token
-        kubernetes_platform.read_secrets.each do |secret|
+      def request_kuberenetes_token
+        kubernetes.read_secrets.each do |secret|
           name = secret.dig('metadata', 'name')
           if /default-token/ =~ name
             token_base64 = secret.dig('data', 'token')
-            if token_base64
-              kubernetes_platform.token = Base64.decode64(token_base64)
-              break
-            end
+            return Base64.decode64(token_base64) if token_base64
           end
         end
       end
@@ -50,16 +46,16 @@ module Clusters
       def gke_cluster
         @gke_cluster ||= provider.api_client.projects_zones_clusters_get(
           provider.gcp_project_id,
-          provider.gcp_cluster_zone,
-          provider.gcp_cluster_name)
+          provider.zone,
+          cluster.name)
       end
 
       def cluster
-        provider.cluster
+        @cluster ||= provider.cluster
       end
 
-      def kubernetes_platform
-        cluster.kubernetes_platform
+      def kubernetes
+        @kubernetes ||= cluster.platform_kubernetes
       end
     end
   end
diff --git a/app/services/clusters/gcp/provision_service.rb b/app/services/clusters/gcp/provision_service.rb
index 269705000ac..8ec81e22203 100644
--- a/app/services/clusters/gcp/provision_service.rb
+++ b/app/services/clusters/gcp/provision_service.rb
@@ -6,43 +6,41 @@ module Clusters
       def execute(provider)
         @provider = provider
 
-        unless operation.status == 'RUNNING' || operation.status == 'PENDING'
-          return provider.make_errored!("Operation status is unexpected; #{operation.status_message}")
+        get_operation_id do |operation_id|
+          if provider.make_creating(operation_id)
+            WaitForClusterCreationWorker.perform_in(
+              Clusters::Gcp::VerifyProvisionStatusService::INITIAL_INTERVAL,
+              provider.id)
+          else
+            provider.make_errored!("Failed to update provider record; #{provider.errors}")
+          end
         end
+      end
 
-        provider.operation_id = operation_id
+      private
 
-        unless provider.operation_id
-          return provider.make_errored!('Can not find operation_id from self_link')
-        end
+      def get_operation_id
+        operation = provider.api_client.projects_zones_clusters_create(
+          provider.gcp_project_id,
+          provider.zone,
+          provider.cluster.name,
+          provider.num_nodes,
+          machine_type: provider.machine_type)
 
-        if provider.make_creating
-          WaitForClusterCreationWorker.perform_in(
-            WaitForClusterCreationWorker::INITIAL_INTERVAL, provider.id)
-        else
-          return provider.make_errored!("Failed to update provider record; #{provider.errors}")
+        unless operation.status == 'PENDING' || operation.status == 'RUNNING'
+          return provider.make_errored!("Operation status is unexpected; #{operation.status_message}")
         end
-      rescue Google::Apis::ServerError, Google::Apis::ClientError, Google::Apis::AuthorizationError => e
-        return provider.make_errored!("Failed to request to CloudPlatform; #{e.message}")
-      end
 
-      private
+        operation_id = provider.api_client.parse_operation_id(operation.self_link)
 
-      def operation_id
-        api_client.parse_operation_id(operation.self_link)
-      end
+        unless operation_id
+          return provider.make_errored!('Can not find operation_id from self_link')
+        end
 
-      def operation
-        @operation ||= api_client.projects_zones_providers_create(
-          provider.project_id,
-          provider.provider_zone,
-          provider.provider_name,
-          provider.provider_size,
-          machine_type: provider.machine_type)
-      end
+        yield(operation_id)
 
-      def api_client
-        provider.api_client
+      rescue Google::Apis::ServerError, Google::Apis::ClientError, Google::Apis::AuthorizationError => e
+        provider.make_errored!("Failed to request to CloudPlatform; #{e.message}")
       end
     end
   end
diff --git a/app/services/clusters/gcp/verify_provision_status_service.rb b/app/services/clusters/gcp/verify_provision_status_service.rb
index 466ea986516..bc33756f27c 100644
--- a/app/services/clusters/gcp/verify_provision_status_service.rb
+++ b/app/services/clusters/gcp/verify_provision_status_service.rb
@@ -12,7 +12,7 @@ module Clusters
 
         request_operation do |operation|
           case operation.status
-          when 'RUNNING'
+          when 'PENDING', 'RUNNING'
             continue_creation(operation)
           when 'DONE'
             finalize_creation
@@ -25,11 +25,15 @@ module Clusters
       private
 
       def continue_creation(operation)
-        if TIMEOUT < Time.now.utc - operation.start_time.to_time.utc
-          return provider.make_errored!("Cluster creation time exceeds timeout; #{TIMEOUT}")
+        if elapsed_time_from_creation(operation) < TIMEOUT
+          WaitForClusterCreationWorker.perform_in(EAGER_INTERVAL, provider.cluster_id)
+        else
+          provider.make_errored!("Cluster creation time exceeds timeout; #{TIMEOUT}")
         end
+      end
 
-        WaitForClusterCreationWorker.perform_in(EAGER_INTERVAL, provider.cluster_id)
+      def elapsed_time_from_creation(operation)
+        Time.now.utc - operation.start_time.to_time.utc
       end
 
       def finalize_creation
@@ -37,7 +41,7 @@ module Clusters
       end
 
       def request_operation(&blk)
-        Clusters::FetchGcpOperationService.new.execute(provider, &blk)
+        Clusters::Gcp::FetchOperationService.new.execute(provider, &blk)
       end
     end
   end
diff --git a/app/validators/cluster_name_validator.rb b/app/validators/cluster_name_validator.rb
new file mode 100644
index 00000000000..6c9850af30f
--- /dev/null
+++ b/app/validators/cluster_name_validator.rb
@@ -0,0 +1,24 @@
+# ClusterNameValidator
+#
+# Custom validator for ClusterName.
+class ClusterNameValidator < ActiveModel::EachValidator
+  def validate_each(record, attribute, value)
+    if record.user?
+      unless value.present?
+        record.errors.add(attribute, " has to be present")
+      end
+    elsif record.gcp?
+      if record.persisted? && record.name != value
+        record.errors.add(attribute, " can not be changed because it's synchronized with provider")
+      end
+
+      unless value.length >= 1 && value.length <= 63
+        record.errors.add(attribute, " is invalid syntax")
+      end
+
+      unless value =~ Gitlab::Regex.kubernetes_namespace_regex
+        record.errors.add(attribute, Gitlab::Regex.kubernetes_namespace_regex_message)
+      end
+    end
+  end
+end
diff --git a/app/views/projects/clusters/_form.html.haml b/app/views/projects/clusters/_form.html.haml
index 371cdb1e403..b3020513abf 100644
--- a/app/views/projects/clusters/_form.html.haml
+++ b/app/views/projects/clusters/_form.html.haml
@@ -4,34 +4,38 @@
       - link_to_help_page = link_to(s_('ClusterIntegration|help page'), help_page_path('user/project/clusters/index'), target: '_blank', rel: 'noopener noreferrer')
       = s_('ClusterIntegration|Read our %{link_to_help_page} on cluster integration.').html_safe % { link_to_help_page: link_to_help_page}
 
-      = form_for [@project.namespace.becomes(Namespace), @project, @cluster] do |field|
+      = form_for @cluster, url: namespace_project_clusters_path(@project.namespace, @project, @cluster), as: :cluster do |field|
+        = field.hidden_field :platform_type, :value => 'kubernetes'
+        = field.hidden_field :provider_type, :value => 'gcp'
         = form_errors(@cluster)
         .form-group
-          = field.label :gcp_cluster_name, s_('ClusterIntegration|Cluster name')
-          = field.text_field :gcp_cluster_name, class: 'form-control'
+          = field.label :name, s_('ClusterIntegration|Cluster name')
+          = field.text_field :name, class: 'form-control'
 
-        .form-group
-          = field.label :gcp_project_id, s_('ClusterIntegration|Google Cloud Platform project ID')
-          = link_to(s_('ClusterIntegration|See your projects'), 'https://console.cloud.google.com/home/dashboard', target: '_blank', rel: 'noopener noreferrer')
-          = field.text_field :gcp_project_id, class: 'form-control'
+        = field.fields_for :provider_gcp, @cluster.provider_gcp do |provider_gcp_field|
+          .form-group
+            = provider_gcp_field.label :gcp_project_id, s_('ClusterIntegration|Google Cloud Platform project ID')
+            = link_to(s_('ClusterIntegration|See your projects'), 'https://console.cloud.google.com/home/dashboard', target: '_blank', rel: 'noopener noreferrer')
+            = provider_gcp_field.text_field :gcp_project_id, class: 'form-control'
 
-        .form-group
-          = field.label :gcp_cluster_zone, s_('ClusterIntegration|Zone')
-          = link_to(s_('ClusterIntegration|See zones'), 'https://cloud.google.com/compute/docs/regions-zones/regions-zones', target: '_blank', rel: 'noopener noreferrer')
-          = field.text_field :gcp_cluster_zone, class: 'form-control', placeholder: 'us-central1-a'
+          .form-group
+            = provider_gcp_field.label :zone, s_('ClusterIntegration|Zone')
+            = link_to(s_('ClusterIntegration|See zones'), 'https://cloud.google.com/compute/docs/regions-zones/regions-zones', target: '_blank', rel: 'noopener noreferrer')
+            = provider_gcp_field.text_field :zone, class: 'form-control', placeholder: 'us-central1-a'
 
-        .form-group
-          = field.label :gcp_cluster_size, s_('ClusterIntegration|Number of nodes')
-          = field.text_field :gcp_cluster_size, class: 'form-control', placeholder: '3'
+          .form-group
+            = provider_gcp_field.label :num_nodes, s_('ClusterIntegration|Number of nodes')
+            = provider_gcp_field.text_field :num_nodes, class: 'form-control', placeholder: '3'
 
-        .form-group
-          = field.label :gcp_machine_type, s_('ClusterIntegration|Machine type')
-          = link_to(s_('ClusterIntegration|See machine types'), 'https://cloud.google.com/compute/docs/machine-types', target: '_blank', rel: 'noopener noreferrer')
-          = field.text_field :gcp_machine_type, class: 'form-control', placeholder: 'n1-standard-4'
+          .form-group
+            = provider_gcp_field.label :machine_type, s_('ClusterIntegration|Machine type')
+            = link_to(s_('ClusterIntegration|See machine types'), 'https://cloud.google.com/compute/docs/machine-types', target: '_blank', rel: 'noopener noreferrer')
+            = provider_gcp_field.text_field :machine_type, class: 'form-control', placeholder: 'n1-standard-4'
 
+        = field.fields_for :platform_kubernetes, @cluster.platform_kubernetes do |platform_kubernetes_field|
           .form-group
-          = field.label :project_namespace, s_('ClusterIntegration|Project namespace (optional, unique)')
-          = field.text_field :project_namespace, class: 'form-control', placeholder: @cluster.project_namespace_placeholder
+          = platform_kubernetes_field.label :namespace, s_('ClusterIntegration|Project namespace (optional, unique)')
+          = platform_kubernetes_field.text_field :namespace, class: 'form-control', placeholder: @cluster.platform_kubernetes.default_namespace(@project)
 
         .form-group
           = field.submit s_('ClusterIntegration|Create cluster'), class: 'btn btn-save'
diff --git a/app/views/projects/clusters/show.html.haml b/app/views/projects/clusters/show.html.haml
index ff76abc3553..49adae82454 100644
--- a/app/views/projects/clusters/show.html.haml
+++ b/app/views/projects/clusters/show.html.haml
@@ -33,7 +33,7 @@
         - else
           = s_('ClusterIntegration|Cluster integration is disabled for this project.')
 
-    = form_for [@project.namespace.becomes(Namespace), @project, @cluster] do |field|
+    = form_for @cluster, url: namespace_project_cluster_path(@project.namespace, @project, @cluster), as: :cluster do |field|
       = form_errors(@cluster)
       .form-group.append-bottom-20
         %label.append-bottom-10
@@ -62,9 +62,9 @@
         %label.append-bottom-10{ for: 'cluter-name' }
           = s_('ClusterIntegration|Cluster name')
         .input-group
-          %input.form-control.cluster-name{ value: @cluster.gcp_cluster_name, disabled: true }
+          %input.form-control.cluster-name{ value: @cluster.name, disabled: true }
           %span.input-group-addon.clipboard-addon
-            = clipboard_button(text: @cluster.gcp_cluster_name, title: s_('ClusterIntegration|Copy cluster name'))
+            = clipboard_button(text: @cluster.name, title: s_('ClusterIntegration|Copy cluster name'))
 
   %section.settings#js-cluster-advanced-settings
     .settings-header
diff --git a/app/workers/cluster_provision_worker.rb b/app/workers/cluster_provision_worker.rb
index 79f0d73c396..0929fffc444 100644
--- a/app/workers/cluster_provision_worker.rb
+++ b/app/workers/cluster_provision_worker.rb
@@ -4,7 +4,7 @@ class ClusterProvisionWorker
 
   def perform(cluster_id)
     Clusters::Cluster.find_by_id(cluster_id).try do |cluster|
-      cluster.gcp_provider.try do |provider|
+      cluster.provider_gcp.try do |provider|
         Clusters::Gcp::ProvisionService.new.execute(provider)
       end
     end
diff --git a/app/workers/wait_for_cluster_creation_worker.rb b/app/workers/wait_for_cluster_creation_worker.rb
index d8c42c6bd55..b2f04869636 100644
--- a/app/workers/wait_for_cluster_creation_worker.rb
+++ b/app/workers/wait_for_cluster_creation_worker.rb
@@ -4,7 +4,7 @@ class WaitForClusterCreationWorker
 
   def perform(cluster_id)
     Clusters::Cluster.find_by_id(cluster_id).try do |cluster|
-      cluster.gcp_provider.try do |provider|
+      cluster.provider_gcp.try do |provider|
         Clusters::Gcp::VerifyProvisionStatusService.new.execute(provider)
       end
     end