1 files changed, 40 insertions, 0 deletions
diff --git a/lib/gitlab/ci/build/prerequisite/kubernetes_namespace.rb b/lib/gitlab/ci/build/prerequisite/kubernetes_namespace.rb
new file mode 100644
index 00000000000..41135ae62bb
--- /dev/null
+++ b/lib/gitlab/ci/build/prerequisite/kubernetes_namespace.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Ci
+    module Build
+      module Prerequisite
+        class KubernetesNamespace < Base
+          def unmet?
+            deployment_cluster.present? && kubernetes_namespace.new_record?
+          end
+
+          def complete!
+            return unless unmet?
+
+            create_or_update_namespace
+          end
+
+          private
+
+          def deployment_cluster
+            build.deployment&.cluster
+          end
+
+          def kubernetes_namespace
+            strong_memoize(:kubernetes_namespace) do
+              deployment_cluster.find_or_initialize_kubernetes_namespace_for_project(build.project)
+            end
+          end
+
+          def create_or_update_namespace
+            Clusters::Gcp::Kubernetes::CreateOrUpdateNamespaceService.new(
+              cluster: deployment_cluster,
+              kubernetes_namespace: kubernetes_namespace
+            ).execute
+          end
+        end
+      end
+    end
+  end
+end