Hi everyone - For context, we're running Prefect w...
# ask-community
t
Hi everyone - For context, we're running Prefect with an AWS ECS-based push workpool and finding some gaps in logs/tags to be able to easily debug issues when things go wrong. I'm curious to know if there is a way to accomplish any of the following: 1. Expose PREFECT__FLOW_RUN_NAME alongside the PREFECT__FLOW_RUN_ID environment variable in an AWS ECS push-based work pool? Our logs contain the flow run name but the ECS task has the flow run id and there isn't a way to search by run id in the Prefect Cloud dashboard 2. Similarly, log the flow run id in the logger for prefect flows (i.e. from
21:44:01.401 | INFO | Flow run 'shrewd-turkey' - Downloading flow code from storage at '.'
to
21:44:01.401 | INFO | Flow run 'shrewd-turkey' (06876ca3-9c3d-7520-8000-09cbe7a46f8c) - Downloading flow code from storage at '.'
or equivalent 3. Manage the tags for a flow run for the AWS ECS Task using prefect specific values (i.e. can we manually add the values we're interested in) Any one of these things would make our debugging workflows much easier 🙂 Does anyone have any ideas on how we could expose this info?
@Marvin is there anything you're aware of that would allow me to address the concerns I mentioned in the parent message?
m
✅ thought for 2.9 seconds
✅ thought for 2.9 seconds
I apologize, but I don't have access to any previous messages or "parent message" you're referring to - each interaction with me starts fresh. Could you please share the concerns you'd like me to address? That way, I can provide specific and relevant assistance. Once you share your concerns, I can use my research tools and knowledge of Prefect to help find appropriate solutions.
I notice this appears to be a follow-up question, but I don't have access to the previous messages or context you're referring to. I can't see any "parent message" or the concerns you mentioned earlier. Could you please: 1. Describe the concerns you're dealing with 2. Provide any relevant context about your Prefect setup or use case This will help me give you a much more specific and helpful response!
t
@Marvin for context, we're running Prefect with an AWS ECS-based push workpool and finding some gaps in logs/tags to be able to easily debug issues when things go wrong. I'm curious to know if there is a way to accomplish any of the following: 1. Expose PREFECT__FLOW_RUN_NAME alongside the PREFECT__FLOW_RUN_ID environment variable in an AWS ECS push-based work pool? Our logs contain the flow run name but the ECS task has the flow run id and there isn't a way to search by run id in the Prefect Cloud dashboard 2. Similarly, log the flow run id in the logger for prefect flows (i.e. from
21:44:01.401 | INFO | Flow run 'shrewd-turkey' - Downloading flow code from storage at '.'
to
21:44:01.401 | INFO | Flow run 'shrewd-turkey' (06876ca3-9c3d-7520-8000-09cbe7a46f8c) - Downloading flow code from storage at '.'
or equivalent 3. Manage the tags for a flow run for the AWS ECS Task using prefect specific values (i.e. can we manually add the values we're interested in) Any one of these things would make our debugging workflows much easier 🙂 Do you have any ideas on how we could expose this info?
m
✅ thought for 64.0 seconds
Let me address each of your points and provide some potential solutions: 1. Exposing PREFECT__FLOW_RUN_NAME in ECS Tasks: You can modify your ECS work pool configuration to include additional environment variables. Here's how you can expose both the flow run ID and name:
Copy code
python
from prefect.infrastructure.container import Container

container = Container(
    env={
        "PREFECT__FLOW_RUN_ID": "${flow_run.id}",
        "PREFECT__FLOW_RUN_NAME": "${flow_run.name}"
    }
)
2. Including Flow Run ID in Logs: You can create a custom logger configuration that includes the flow run ID. Here's an example:
Copy code
python
from prefect import flow
import logging
from prefect.runtime import flow_run

@flow
def your_flow():
    logger = logging.getLogger("prefect")
    flow_id = flow_run.id
    flow_name = flow_run.name
    
    # Create a custom log format that includes both name and ID
    <http://logger.info|logger.info>(f"Flow run '{flow_name}' ({flow_id}) - Starting execution")
    # Your flow logic here
3. Managing Tags for ECS Tasks: You can access and manipulate tags within your flow, and pass them to your ECS tasks:
Copy code
python
from prefect import flow
from prefect.runtime import flow_run

@flow
def your_flow():
    # Access current tags
    current_tags = flow_run.tags
    
    # You can also set environment variables in your ECS task definition
    # that include these tags using the Container infrastructure
    container = Container(
        env={
            "FLOW_TAGS": ",".join(flow_run.tags),
            "FLOW_RUN_ID": flow_run.id,
            "FLOW_RUN_NAME": flow_run.name
        }
    )
For your ECS work pool configuration, you can include these values in your task definition. Here's a suggestion for your work pool configuration:
Copy code
python
from prefect.infrastructure import Container
from prefect.worker.ecs import ECSWorker

container_config = {
    "env": {
        "PREFECT__FLOW_RUN_ID": "${flow_run.id}",
        "PREFECT__FLOW_RUN_NAME": "${flow_run.name}",
        "PREFECT__FLOW_TAGS": "${flow_run.tags}"
    },
    "tags": {
        "prefect.flow-name": "${flow_run.name}",
        "prefect.flow-id": "${flow_run.id}"
    }
}
Additional Suggestions: 1. You can use the flow run ID to create a direct link to the flow run in Prefect Cloud using the format:
<https://app.prefect.cloud/account/workspace/flow-runs/flow-run/{flow_run_id}>
2. Consider adding these identifiers as ECS task tags, which will make them searchable in the AWS Console 3. You might want to add custom logging handlers that automatically include this information in all log messages Would you like me to elaborate on any of these solutions or provide more specific examples for your use case? Also, if you're interested in a particular aspect (like the ECS task definition specifics or logging configuration), I can dive deeper into that area.
t
@Marvin How would I add these identifiers as ECS task tags?
m
✅ thought for 30.6 seconds
For AWS ECS push work pools, you can add tags to your tasks by configuring them in the work pool's base job template. Here's how to do it: 1. First, get your current work pool configuration:
Copy code
bash
prefect work-pool preview "your-pool-name" > ecs-pool-config.json
2. Modify the JSON configuration to include tags. Here's an example configuration that includes both static and dynamic tags:
Copy code
json
{
    "job_configuration": {
        "tags": {
            "prefect:flow-name": "${flow_run.name}",
            "prefect:flow-id": "${flow_run.id}",
            "prefect:deployment-id": "${deployment.id}",
            "prefect:flow-tags": "${flow_run.tags}",
            "environment": "production"  // static tag example
        }
    }
}
3. Update your work pool with the new configuration:
Copy code
bash
prefect work-pool create "your-pool-name" --type ecs:push --base-job-template ecs-pool-config.json --overwrite
A few important notes about ECS task tagging: 1. AWS has some restrictions on tags: - Maximum of 50 tags per resource - Tag keys and values are case-sensitive - Maximum key length is 128 Unicode characters - Maximum value length is 256 Unicode characters - Allowed characters: letters, numbers, spaces, and these special characters: + - = . _ : / @ 2. Best practices for tags: - Use a consistent prefix (like
prefect:
) to easily identify Prefect-related tags - Consider which tags will be most useful for filtering in the AWS Console - Remember that tags can impact cost allocation and monitoring Here's a more complete example of a work pool configuration that includes both tags and the environment variables we discussed earlier:
Copy code
json
{
    "job_configuration": {
        "tags": {
            "prefect:flow-name": "${flow_run.name}",
            "prefect:flow-id": "${flow_run.id}",
            "prefect:deployment-id": "${deployment.id}",
            "prefect:environment": "production"
        },
        "env": {
            "PREFECT__FLOW_RUN_ID": "${flow_run.id}",
            "PREFECT__FLOW_RUN_NAME": "${flow_run.name}",
            "PREFECT__DEPLOYMENT_ID": "${deployment.id}"
        },
        // ... rest of your ECS configuration ...
    }
}
Would you like me to: 1. Provide more details about specific tag configurations? 2. Show how to verify the tags are being applied correctly? 3. Explain how to query/filter ECS tasks using these tags in AWS?