How to use Boto3 to get the status of a migration operation?

Boto3 is the AWS SDK for Python that provides APIs for interacting with AWS services. You can use it to monitor the status of AWS Glue catalog migration operations, which move metadata from external catalogs to AWS Glue Data Catalog.

Problem Statement

Use boto3 library in Python to get the status of a migration operation in AWS Glue Data Catalog.

Approach

Step 1 ? Import boto3 and botocore exceptions to handle errors.

Step 2 ? Define the catalog_id parameter (optional). If not provided, it checks the logged-in user's account.

Step 3 ? Create an AWS session using boto3. Ensure region_name is configured in your default profile.

Step 4 ? Create an AWS client for Glue service.

Step 5 ? Call get_catalog_import_status() with the catalog_id parameter.

Step 6 ? Handle exceptions appropriately.

Example

The following code demonstrates how to check migration status using boto3 ?

import boto3
from botocore.exceptions import ClientError

def status_of_migration(catalog_id=None):
    session = boto3.session.Session()
    glue_client = session.client('glue')
    try:
        response = glue_client.get_catalog_import_status(CatalogId=catalog_id)
        return response
    except ClientError as e:
        raise Exception("boto3 client error in status_of_migration: " + str(e))
    except Exception as e:
        raise Exception("Unexpected error in status_of_migration: " + str(e))

print(status_of_migration())

Output

{'ImportStatus': {'ImportCompleted': True, 'ImportTime':
datetime.datetime(2017, 11, 17, 1, 32, 44, tzinfo=tzlocal()),
'ImportedBy': 'StatusSetByDefault'}, 'ResponseMetadata': {'RequestId':
'7c33d6f9-??????-3b202961e3e7', 'HTTPStatusCode': 200, 'HTTPHeaders':
{'date': 'Sun, 21 Feb 2021 05:40:06 GMT', 'content-type':
'application/x-amz-json-1.1', 'content-length': '102', 'connection':
'keep-alive', 'x-amzn-requestid': '7c33d6f9-???.????-3b202961e3e7'},
'RetryAttempts': 0}}

Understanding the Response

The response contains an ImportStatus object with the following key fields:

• ImportCompleted ? Boolean indicating if migration is complete
• ImportTime ? Timestamp when the import operation finished
• ImportedBy ? User or service that initiated the migration

Key Points

• The catalog_id parameter is optional and defaults to the current AWS account
• This method returns details of ongoing or the most recent migration operation
• Proper exception handling is essential for production applications
• AWS credentials and region must be properly configured

Conclusion

Using boto3's get_catalog_import_status() method provides a straightforward way to monitor AWS Glue catalog migration operations. The response includes completion status, timing information, and metadata about the import process.