CloudWatch Logs 시작

def hello_cloudwatch_logs() -> None:
    """
    Verifies connectivity to CloudWatch Logs by calling DescribeLogGroups
    and displaying the first page of log groups with name, ARN, and
    creation time.
    """
    logs_client = boto3.client("logs")

    try:
        response = logs_client.describe_log_groups()
        log_groups = response.get("logGroups", list())

        if not log_groups:
            print("No log groups found in this Region for your account.")
        else:
            print(f"Found {len(log_groups)} log group(s):\n")
            for lg in log_groups:
                name = lg.get("logGroupName", "N/A")
                arn = lg.get("arn", "N/A")
                creation_ms = lg.get("creationTime", 0)
                creation_dt = datetime.fromtimestamp(
                    creation_ms / 1000, tz=timezone.utc
                )
                print(f"  Name: {name}")
                print(f"  ARN:  {arn}")
                print(f"  Created: {creation_dt.strftime('%Y-%m-%d %H:%M:%S UTC')}")
                print()

    except ClientError as error:
        logger.error(
            "Failed to describe log groups: %s",
            error.response["Error"]["Message"],
        )
        raise