Use bulk_insert instead of AR create

db/post_migrate/20171124104327_migrate_kubernetes_service_to_new_clusters_architectures.rb

@@ -94,24 +94,57 @@ class MigrateKubernetesServiceToNewClustersArchitectures < ActiveRecord::Migrati
 
   def up
     MigrateKubernetesServiceToNewClustersArchitectures::Service
-      .unmanaged_kubernetes_service.find_each(batch_size: 1) do |kubernetes_service|
-      MigrateKubernetesServiceToNewClustersArchitectures::Cluster.create(
+      .unmanaged_kubernetes_service.each_batch(of: 100) do |kubernetes_services|
+
+      rows_for_clusters = kubernetes_services.map do |kubernetes_service|
+        {
           enabled: kubernetes_service.active,
           user_id: nil, # KubernetesService doesn't have
           name: DEFAULT_KUBERNETES_SERVICE_CLUSTER_NAME,
           provider_type: MigrateKubernetesServiceToNewClustersArchitectures::Cluster.provider_types[:user],
           platform_type: MigrateKubernetesServiceToNewClustersArchitectures::Cluster.platform_types[:kubernetes],
-        projects: [kubernetes_service.project.becomes(MigrateKubernetesServiceToNewClustersArchitectures::Project)],
           environment_scope: find_dedicated_environement_scope(kubernetes_service.project),
-        platform_kubernetes_attributes: {
+          created_at: Gitlab::Database.sanitize_timestamp(kubernetes_service.created_at),
+          updated_at: Gitlab::Database.sanitize_timestamp(kubernetes_service.updated_at)
+        }
+      end
+
+      inserted_cluster_ids = Gitlab::Database.bulk_insert('clusters', rows_for_clusters, return_ids: true)
+
+      rows_for_cluster_platforms_kubernetes = kubernetes_services.each_with_index.map do |kubernetes_service, i|
+
+        # Create PlatformsKubernetes instance for generating an encrypted token
+        platforms_kubernetes =
+          MigrateKubernetesServiceToNewClustersArchitectures::PlatformsKubernetes
+          .new(token: kubernetes_service.token)
+
+        {
+          cluster_id: inserted_cluster_ids[i],
           api_url: kubernetes_service.api_url,
           ca_cert: kubernetes_service.ca_pem,
           namespace: kubernetes_service.namespace,
           username: nil, # KubernetesService doesn't have
           encrypted_password: nil, # KubernetesService doesn't have
           encrypted_password_iv: nil, # KubernetesService doesn't have
-          token: kubernetes_service.token # encrypted_token and encrypted_token_iv
-        } )
+          encrypted_token: platforms_kubernetes.encrypted_token, # encrypted_token and encrypted_token_iv
+          encrypted_token_iv: platforms_kubernetes.encrypted_token_iv, # encrypted_token and encrypted_token_iv
+          created_at: Gitlab::Database.sanitize_timestamp(kubernetes_service.created_at),
+          updated_at: Gitlab::Database.sanitize_timestamp(kubernetes_service.updated_at)
+        }
+      end
+
+      Gitlab::Database.bulk_insert('cluster_platforms_kubernetes', rows_for_cluster_platforms_kubernetes)
+
+      rows_for_cluster_projects = kubernetes_services.each_with_index.map do |kubernetes_service, i|
+        {
+          cluster_id: inserted_cluster_ids[i],
+          project_id: kubernetes_service.project_id,
+          created_at: Gitlab::Database.sanitize_timestamp(kubernetes_service.created_at),
+          updated_at: Gitlab::Database.sanitize_timestamp(kubernetes_service.updated_at)
+        }
+      end
+
+      Gitlab::Database.bulk_insert('cluster_projects', rows_for_cluster_projects)
     end
 
     MigrateKubernetesServiceToNewClustersArchitectures::Service.kubernetes_service_without_template.update_all(active: false)