1 files changed, 29 insertions, 0 deletions
diff --git a/db/post_migrate/20220505022001_add_index_to_deployments_on_created_at_cluster_id_and_project_id.rb b/db/post_migrate/20220505022001_add_index_to_deployments_on_created_at_cluster_id_and_project_id.rb
new file mode 100644
index 00000000000..c78c3a86cf3
--- /dev/null
+++ b/db/post_migrate/20220505022001_add_index_to_deployments_on_created_at_cluster_id_and_project_id.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+class AddIndexToDeploymentsOnCreatedAtClusterIdAndProjectId < Gitlab::Database::Migration[2.0]
+  disable_ddl_transaction!
+
+  # This temporary index was created to support the script that will be run as part o this
+  # Change Request: https://gitlab.com/gitlab-com/gl-infra/production/-/issues/6981
+  #
+  # Issue to remove the temporary index: https://gitlab.com/gitlab-org/gitlab/-/issues/361389
+  INDEX_NAME = 'tp_index_created_at_cluster_id_project_id_on_deployments'
+
+  # The change request will only run for deployments newer than this date. This is what we'll
+  # be considering as "Active certificate based cluster Kubernetes Deployments". Namespaces with
+  # deployments older than this will have to be migrated to the agent and won't have their
+  # certificate based clusters life extended.
+  DEPLOYMENTS_START_DATE = '2022-04-03 00:00:00'
+
+  def up
+    add_concurrent_index(
+      :deployments,
+      [:created_at, :cluster_id, :project_id],
+      name: INDEX_NAME,
+      where: "cluster_id is not null and created_at > '#{DEPLOYMENTS_START_DATE}'")
+  end
+
+  def down
+    remove_concurrent_index_by_name(:deployments, INDEX_NAME)
+  end
+end