SageMaker Pipelines

import os
import json
import uuid
import boto3
import logging
from typing import Dict, List, Any
import fiddler as fdl

# Configure logging
logger = logging.getLogger()
logger.setLevel(logging.INFO)

# Load environment variables, customize to model and use case
url = os.getenv('FIDDLER_URL')
token = os.getenv('FIDDLER_TOKEN')
model_uuid = os.getenv('FIDDLER_MODEL_UUID')
model_columns = os.getenv('MODEL_COLUMNS')
model_output_column = os.getenv('MODEL_OUTPUT')
timestamp_column = os.getenv('MODEL_TIMESTAMP')

# Initialize AWS clients
s3_client = boto3.client('s3')

# Initialize Fiddler connection and Fiddler Model to receive events
fdl.init(url=url, token=token)
fiddler_model = fdl.Model.get(id_=model_uuid)

def get_all_columns():
    # The types of columns needed when publishing depend on use case. Typically,
    # you would expect to pass at least your model inputs and output(s) and often
    # metadata such as IDs, dates, data segments, etc.
    return model_columns.split(',') + [timestamp_column] + [model_output_column]

def process_jsonl_content(event_data: str) -> Dict[str, Any]:
    input_data = event_data['captureData']['endpointInput']['data']
    input_values = input_data.split(',')  # Split the CSV string into a list
    
    # Extract the model prediction from 'captureData/endpointOutput/data'
    model_prediction = event_data['captureData']['endpointOutput']['data']

    # Optionally, you can set your own timestamp value on the inference occurrence time,
    # or let Fiddler default it to the time of publish.
    timestamp_value = event_data['eventMetadata']['inferenceTime']
  
    # Combine inputs and any metadata values with the output into a single row
    all_values = input_values + [timestamp_value] + [model_prediction]

    # Create dictionary using zip to pair column names with their values
    return dict(zip(get_all_columns(), all_values))

def parse_sagemaker_log(log_file_path: str) -> List[Dict[str, Any]]:
    try:
        # Collect all events in a List, 1 per JSON-line in the file
        event_rows = []
        with open(log_file_path, 'r') as file:
            for line in file:
                event = json.loads(line.strip())
                row = process_jsonl_content(event)
                event_rows.append(row)
        
        return {
            'status': 'success',
            'record_count': len(event_rows),
            'data': event_rows
        }   
        
    except json.JSONDecodeError as e:
        logger.error(f'Error parsing JSONL content: {str(e)}')
        raise

def publish_to_fiddler(inferences: List[Dict[str, Any]], model: fdl.Model):
    # There are multiple options for publishing data to Fiddler, check
    # the online documentation for batch, streaming, and REST API options.
    # The below publish call will use a streaming approach managed by 
    # the Fiddler Python client internally based on the volume of inferences.

    event_ids = model.publish(
        source=inferences,
        environment=fdl.EnvType.PRODUCTION
    )

    return event_ids 

def lambda_handler(event: Dict[str, Any], context: Any) -> Dict[str, Any]:
    # Process each record in the event, streaming to Fiddler in batches
    for record in event['Records']:
        # Extract bucket and key information
        bucket = record['s3']['bucket']['name']
        key = record['s3']['object']['key']

        logger.info(f'Processing new file: {key} from bucket: {bucket}')

        # Persist log file to a temporary location 
        tmp_key = key.replace('/', '')
        download_path = f'/tmp/{uuid.uuid4()}{tmp_key}'
        s3_client.download_file(bucket, key, download_path)

        # Retrieve the inference event(s) from the log file
        results = parse_sagemaker_log(download_path)

        # Check if the log file was processed successfully
        if results['status'] != 'success':
            logger.error(f'Error processing log file: {key}')
            return {
                'statusCode': 500,
                'body': {'message': 'Error processing log file', 'results': results},
            }

        # Push the inference events to Fiddler
        event_ids = publish_to_fiddler(results["data"], fiddler_model)
        logger.info(f'Published events to Fiddler with ID(s): {event_ids}')

    return {
        'statusCode': 200,
        'body': {'message': 'Successfully processed events', 'results': results},
    }