Roll back an IAM policy version using an Amazon SDK - Amazon Identity and Access Management
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Roll back an IAM policy version using an Amazon SDK

The following code example shows how to:

  • Get the list of policy versions in order by date.

  • Find the default policy version.

  • Make the previous policy version the default.

  • Delete the old default version.

SDK for Python (Boto3)

There's more on GitHub. Find the complete example and learn how to set up and run in the Amazon Code Examples Repository.

def rollback_policy_version(policy_arn): """ Rolls back to the previous default policy, if it exists. 1. Gets the list of policy versions in order by date. 2. Finds the default. 3. Makes the previous policy the default. 4. Deletes the old default version. :param policy_arn: The ARN of the policy to roll back. :return: The default version of the policy after the rollback. """ try: policy_versions = sorted( iam.Policy(policy_arn).versions.all(), key=operator.attrgetter("create_date"), )"Got %s versions for %s.", len(policy_versions), policy_arn) except ClientError: logger.exception("Couldn't get versions for %s.", policy_arn) raise default_version = None rollback_version = None try: while default_version is None: ver = policy_versions.pop() if ver.is_default_version: default_version = ver rollback_version = policy_versions.pop() rollback_version.set_as_default()"Set %s as the default version.", rollback_version.version_id) default_version.delete()"Deleted original default version %s.", default_version.version_id) except IndexError: if default_version is None: logger.warning("No default version found for %s.", policy_arn) elif rollback_version is None: logger.warning( "Default version %s found for %s, but no previous version exists, so " "nothing to roll back to.", default_version.version_id, policy_arn, ) except ClientError: logger.exception("Couldn't roll back version for %s.", policy_arn) raise else: return rollback_version

For a complete list of Amazon SDK developer guides and code examples, see Using IAM with an Amazon SDK. This topic also includes information about getting started and details about previous SDK versions.