@Marvin When using AWS ECS with Prefect, do the logs automatically go to AWS Cloudwatch? And is there a way to configure directory that logs will go to?

For Prefect 2.x, if you are using AWS ECS, the Prefect container can be configured to send its output to AWS CloudWatch logs. To achieve this, you need an execution role with the permissions:

logs:CreateLogStream

,

logs:CreateLogGroup

, and

logs:PutLogEvents

. You can find more details and available options in the AWS documentation here. This feature is not enabled by default unless you explicitly set

stream_output

. For additional options, you can pass configuration details using

cloudwatch_logs_options

. For Prefect 3.x, in terms of logging configuration, Prefect provides settings to customize the logging level and individual loggers. By default, logs are directed to the console, but you can override this by specifying environment variables or Prefect Profile settings. You can also configure out-of-box logging by providing your own

logging.yml

file in your

PREFECT_HOME

directory, which by default is

~/.prefect

. - For Prefect 2.x documentation: AWS ECS with Prefect - For Prefect 3.x documentation: Logging Configuration in Prefect These settings and configurations ensure your logs are appropriately managed, whether directed to AWS CloudWatch or customized to a specific directory or logging format.

@Marvin By default, do the prefect logs go into the 'prefect' logs group in AWS cloudwatch? How to override this directory?

By default, when AWS ECS logging is configured, the logs typically go to a specific CloudWatch log group. However, the default log group name isn't explicitly mentioned, so it is likely set during your ECS task definition or adjusted based on your configurations. To override or configure the logs directory (log group name) in AWS CloudWatch for Prefect, follow these steps: 1. Modify ECS Task Definition: When defining your ECS task, specify the

awslogs-group

configuration. This is how you determine the name of the CloudWatch log group. For Prefect 2.x, the relevant parameters you would configure in your task definition are as follows:

python
cloudwatch_logs_options: Dict[str, str] = Field(
    default_factory=dict,
    description=(
        "When `configure_cloudwatch_logs` is enabled, this setting may be used to "
        "pass additional options to the CloudWatch logs configuration or override "
        "the default options. See the AWS documentation for available options. "
        "<https://docs.aws.amazon.com/AmazonECS/latest/developerguide/using_awslogs.html#create_awslogs_logdriver_options.>"
    )
)

For Prefect 3.x, you can customize logging using environment variables or Prefect Profile settings. For example: - To change the logging level:

PREFECT_LOGGING_LEVEL="DEBUG"

- To specify a different log group: Override the

awslogs-group

option in your ECS task definition. For more detailed instructions: - Prefect 2.x ECS Integration - Prefect 3.x Logging Configuration These resources will help you configure the logging group that fits your needs.