NAME
    gcloud alpha spanner instances set-iam-policy - set the IAM policy for a
        Cloud Spanner instance

SYNOPSIS
    gcloud alpha spanner instances set-iam-policy [INSTANCE] POLICY_FILE
        [GCLOUD_WIDE_FLAG ...]

DESCRIPTION
    (ALPHA) Set the IAM policy for a Cloud Spanner instance given a instance ID
    and a file encoded in JSON or YAML that contains the IAM policy.

EXAMPLES
    The following command reads an IAM policy defined in a JSON file
    policy.json and sets it for a spanner instance with the ID
    example-instance:

        $ gcloud alpha spanner instances set-iam-policy example-instance \
            policy.json

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

POSITIONAL ARGUMENTS
     Instance resource - The Spanner instance to set the IAM policy for. This
     represents a Cloud resource. (NOTE) Some attributes are not given
     arguments in this group but can be set in other ways.

     To set the project attribute:
      ◆ provide the argument instance on the command line with a fully
        specified name;
      ◆ set the property spanner/instance with a fully specified name;
      ◆ provide the argument --project on the command line;
      ◆ set the property core/project.

     [INSTANCE]
        ID of the instance or fully qualified identifier for the instance.

        To set the instance attribute:
        ◆ provide the argument instance on the command line;
        ◆ set the property spanner/instance.

     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
        (https://cloud.google.com/iam/reference/rest/v1/Policy).

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 spanner/v1 API. The full documentation for this API
    can be found at: https://cloud.google.com/spanner/

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 spanner instances set-iam-policy

        $ gcloud beta spanner instances set-iam-policy

