Triggering a Prefect workflow externally

Question

I currently have a Prefect workflow running locally on an EC2 instance. I can trigger my workflow on localhost:8080 through the UI. Is there a way to trigger a Prefect workflow externally (say AWS Lambda) via REST API or some other way?

I know that Airflow supports an experimental REST API.

Answer 1

Yes, Prefect exposes a full GraphQL API that you can use to perform all types of actions, including the scheduling / triggering of a workflow. This blog post goes into more detail, and here is some code for setting up an AWS Lambda function to trigger Prefect flow runs.

Answer 2

Yes through REST API you can trigger it using AWS Lambda, and can schedule AWS Lambda trigger using CloudWatch Events Rule, it supports both fixed rate or crown expression scheduler