<@ULVA73B9P>, how do I run a flow using a specific...
# ask-marvin
p
@Marvin, how do I run a flow using a specific prefect work-pool
m
To run a flow using a specific work pool in Prefect 3.x, you'll need to configure the flow to use the desired work pool. Work pools are a bridge between Prefect's orchestration layer and the infrastructure where flows are executed. They allow for dynamic infrastructure provisioning and configuration. Here's a general approach: 1. Define the Work Pool: Ensure that the work pool is defined and configured in your Prefect environment. Work pools can be pull, push, or managed, each optimized for different use cases. 2. Deploy the Flow with the Work Pool: Use
flow.deploy()
to specify the work pool. Here's a simplified example:
Copy code
python
   from prefect import flow

   @flow
   def my_flow():
       print("Running in a specific work pool")

   # Deploy the flow with a specific work pool
   my_flow.deploy(work_pool="my_specific_work_pool")
3. Serve the Flow: Alternatively, you can use
flow.serve()
if your use case fits within its capabilities for scheduling and orchestration. For more detailed information, you can explore Prefect's documentation on work pools. Remember, work pools are optional and designed for more complex infrastructure requirements. You can combine different approaches as needed.
p
@Marvin, how would you do this in prefect 2.x
m
In Prefect 2.x, running a flow using a specific work pool involves configuring the deployment with a worker that polls the work pool for scheduled flow runs. Here's a general approach: 1. Define the Work Pool: Ensure that the work pool is configured in your Prefect environment. Work pools in Prefect 2.x can be push or pull, with pull requiring a worker to actively poll for flow runs. 2. Configure the Deployment: Use
flow.deploy()
to configure the deployment, specifying the work pool and any necessary worker configurations. Here's a conceptual example:
Copy code
python
   from prefect import Flow

   def my_flow():
       print("Running in a specific work pool")

   with Flow("example") as flow:
       my_flow()

   # Deploy the flow with a specific work pool
   flow.deploy(
       work_pool="my_specific_work_pool",
       worker_config={
           # Define worker-specific configurations
           "python_dependencies": ["pandas", "numpy"],
           "docker_image": "my-custom-image"
       }
   )
3. Run the Worker: Ensure a worker is running to poll the specific work pool for flow runs. For more detailed guidance, you can refer to the Prefect 2.x documentation on work pools and Prefect deploy guide. It's important to note that deployments using
serve
cannot be used with work pools in Prefect 2.x.