gcloud compute url-maps set-default-service

NAME
gcloud compute url-maps set-default-service - change the default service or default bucket of a URL map
SYNOPSIS
gcloud compute url-maps set-default-service URL_MAP (--default-backend-bucket=DEFAULT_BACKEND_BUCKET     | --default-service=DEFAULT_SERVICE) [--global     | --region=REGION] [GCLOUD_WIDE_FLAG …]
DESCRIPTION
gcloud compute url-maps set-default-service is used to change the default service or default bucket of a URL map. The default service or default bucket is used for any requests for which there is no mapping in the URL map.
POSITIONAL ARGUMENTS
URL_MAP
Name of the URL map to operate on.
REQUIRED FLAGS
Exactly one of these must be specified:
--default-backend-bucket=DEFAULT_BACKEND_BUCKET
A backend bucket that will be used for requests for which this URL map has no mappings.
--default-service=DEFAULT_SERVICE
A backend service that will be used for requests for which this URL map has no mappings.
OPTIONAL FLAGS
At most one of these can be specified:
--global
If set, the URL map is global.
--region=REGION
Region of the URL map to operate on. If not specified, you might be prompted to select a region (interactive mode only).

To avoid prompting when this flag is omitted, you can set the compute/region property: 

gcloud config set compute/region REGION

A list of regions can be fetched by running: 

gcloud compute regions list

To unset the property, run: 

gcloud config unset compute/region

Alternatively, the region can be stored in the environment variable CLOUDSDK_COMPUTE_REGION.

GCLOUD WIDE FLAGS
These flags are available to all commands: --access-token-file, --account, --billing-project, --configuration, --flags-file, --flatten, --format, --help, --impersonate-service-account, --log-http, --project, --quiet, --trace-token, --user-output-enabled, --verbosity.

Run $ gcloud help for details.

NOTES
These variants are also available: 
gcloud alpha compute url-maps set-default-service
 
gcloud beta compute url-maps set-default-service