gcloud alpha compute backend-buckets set-iam-policy

NAME
gcloud alpha compute backend-buckets set-iam-policy - set the IAM policy binding for a Compute Engine backend bucket
SYNOPSIS
gcloud alpha compute backend-buckets set-iam-policy BACKEND_BUCKET POLICY_FILE [--global     | --region=REGION] [GCLOUD_WIDE_FLAG …]
DESCRIPTION
(ALPHA) Sets the IAM policy for the given backend bucket as defined in a JSON or YAML file.
EXAMPLES
The following command will read an IAM policy defined in a JSON file 'policy.json' and set it for the backend bucket my-backend-bucket: 
gcloud alpha compute backend-buckets set-iam-policy my-backend-bucket policy.json --region=REGION
 
gcloud alpha compute backend-buckets set-iam-policy my-backend-bucket policy.json --global
 
gcloud alpha compute backend-buckets set-iam-policy my-backend-bucket policy.json

See https://cloud.google.com/iam/docs/managing-policies for details of the policy file format and contents.

POSITIONAL ARGUMENTS
BACKEND_BUCKET
ID of the backend bucket or fully qualified identifier for the backend bucket. 
To set the backend_bucket attribute:
+ provide the argument backend_bucket on the command line.
POLICY_FILE
Path to a local JSON or YAML formatted file containing a valid policy.

The output of the get-iam-policy command is a valid file, as is any JSON or YAML file conforming to the structure of a Policy.

FLAGS
At most one of these can be specified:
--global
If set, the backend bucket is global.
--region=REGION
Region of the backend bucket to setIamPolicy. Overrides the default compute/region property value for this command invocation.
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.

API REFERENCE
This command uses the compute/alpha API. The full documentation for this API can be found at: https://cloud.google.com/compute/
NOTES
This command is currently in alpha and might change without notice. If this command fails with API permission errors despite specifying the correct project, you might be trying to access an API with an invitation-only early access allowlist. These variants are also available: 
gcloud compute backend-buckets set-iam-policy
 
gcloud beta compute backend-buckets set-iam-policy