Configure a regional Cloud Load Balancing backend service in Application Design Center
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The Regional Cloud Load Balancing (Backend) component helps you manage load
balancer traffic distribution settings, including the protocol used to connect
to backends, session settings, health checks, and timeouts. These settings
provide fine-grained control over how your load balancer behaves. You can
configure the following backends:
Serverless NEG: A list of serverless Cloud Run or
Cloud Run functions applications as backends.
Managed Instance Group (MIG): A list of Compute Engine instance groups as
backends.
This document describes the connections and parameters you can configure when
using App Design Center to create a regional
Cloud Load Balancing backend service. The configuration parameters are based on
theterraform-google-regional-lb-httpTerraform module.
Component connections
The following table includes the components that you can connect to a regional
Cloud Load Balancing backend, and the resulting updates to your application and
its generated Terraform code.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[],[],null,["# Configure a regional Cloud Load Balancing backend service in Application Design Center\n\n| **Preview**\n|\n|\n| This product is subject to the \"Pre-GA Offerings Terms\" in the General Service Terms section\n| of the [Service Specific Terms](/terms/service-terms#1).\n|\n| Pre-GA products are available \"as is\" and might have limited support.\n|\n| For more information, see the\n| [launch stage descriptions](/products#product-launch-stages).\n\nThe Regional Cloud Load Balancing (Backend) component helps you manage load\nbalancer traffic distribution settings, including the protocol used to connect\nto backends, session settings, health checks, and timeouts. These settings\nprovide fine-grained control over how your load balancer behaves. You can\nconfigure the following backends:\n\n- Serverless NEG: A list of serverless Cloud Run or\n Cloud Run functions applications as backends.\n\n- Managed Instance Group (MIG): A list of Compute Engine instance groups as\n backends.\n\nFor more information, see [Backend services overview](/load-balancing/docs/backend-service).\n\nThis document describes the connections and parameters you can configure when\nusing App Design Center to create a regional\nCloud Load Balancing backend service. The configuration parameters are based on\nthe [terraform-google-regional-lb-http](https://github.com/GoogleCloudPlatform/terraform-google-regional-lb-http/tree/main/modules/backend) Terraform module.\n\nComponent connections\n---------------------\n\nThe following table includes the components that you can connect to a regional\nCloud Load Balancing backend, and the resulting updates to your application and\nits generated Terraform code.\n\nRequired configuration parameters\n---------------------------------\n\nIf your template includes a regional Cloud Load Balancing backend component,\nyou must configure the following parameters before you deploy.\n\nOptional configuration parameters\n---------------------------------\n\nThe following parameters are optional. To display advanced parameters, in the\n**Configuration** area, select **Show advanced fields**.\n\nWhat's next\n-----------\n\nYou must connect your backend component to a frontend component. To configure\nthe frontend component, see [Configure a regional Cloud Load Balancing frontend in Application Design Center](/application-design-center/docs/configure-load-balancing-regional-frontend)."]]
