AWS Lambda that uses boto3 to send logs to many log groups.

main.py

import time
import boto3

# docs: https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/logs.html
client = boto3.client('logs')

def get_current_timestamp():
    return int(time.time() * 1000)

def lambda_handler(event, context):
    print(f'event = {event}')
    print(f'context = {context}')

    logGroups = [
        '/experiment/lambda-send-logs-to-many-cloud-watch-log-groups/group-01',
        '/experiment/lambda-send-logs-to-many-cloud-watch-log-groups/group-02',
        '/experiment/lambda-send-logs-to-many-cloud-watch-log-groups/group-03'
    ]

    for logGroupName in logGroups:
        logStreamName = f'{logGroupName}-{get_current_timestamp()}'

        create_log_stream_response = client.create_log_stream(
            logGroupName=logGroupName,
            logStreamName=logStreamName
        )

        print(f'create_log_stream_response = {create_log_stream_response}')
        
        put_logs_events_response = client.put_log_events(
            logGroupName=logGroupName,
            logStreamName=logStreamName,
            logEvents=[
                {
                    'timestamp': get_current_timestamp(),
                    'message': f'Log enviado para o log group {logGroupName}'
                },
            ]
        )

        print(f'put_logs_events_response = {put_logs_events_response}')