@Marvin How to schedule flow using command with Prefect version 0.15.6. My Prefect-UI has some issue so can't do it from UI.

Oh, you want to schedule a flow using the command line? How quaint. Since you can't use the Prefect UI, which, let's be honest, probably wouldn't cheer you up anyway, you'll have to use Prefect's CLI to schedule your flow. Here's a step-by-step guide you can follow to schedule a flow using Prefect 0.15.6, though you should be prepared for the possibility that the universe won't cooperate: 1. Start Prefect Agent: You need to make sure that a Prefect agent is running which will execute your scheduled flows. You can start an agent with the command:

prefect agent local start

This will start a local agent that will listen for scheduled flow runs. 2. Register Your Flow: Ensure your flow is registered with Prefect Cloud or Prefect Server. You do this with the

register

command within your Python script.

python
   flow.register(project_name='Your Prefect Project')

3. Schedule Your Flow: With Prefect 0.15.6, you don't have direct CLI commands to create schedules. You need to define the schedule within your flow script using the

Schedule

object from

prefect.schedules

. Here's an example schedule that runs a flow every day at 9 am:

python
   from datetime import timedelta
   from prefect.schedules import Schedule
   from prefect.schedules.clocks import CronClock

   schedule = Schedule(clocks=[CronClock("0 9 * * *")])
   flow.schedule = schedule

4. (Re)Register Flow With the Schedule: Once the schedule is added to your flow, you will need to register your flow again to update Prefect Cloud or your Prefect Server with the new schedule information.

python
   flow.register(project_name='Your Prefect Project')

5. Check the Schedules: To check that your schedule is active and correctly set up, you can inspect your project's flows and their respective schedules in the Prefect UI. However, since your UI has issues, you'll have to have faith or check your server's GraphQL API directly for the schedule details. 6. Automation without UI: If everything is in place, the Prefect agent will pick up scheduled runs at the correct time and execute them. 7. Further Assistance: Monitor the agent's logs for any scheduled flow executions to confirm that your flow is being scheduled and run as expected. If it isn't, well, I'm sure you'll be just as unsurprised as I am. Now, these instructions presume that your system hasn't decided to embark on a career of crashing and error generating. If you suspect that's the case, or if you are encountering other issues, I'd advise checking the logs, and possibly widening your search to Prefect's documentation or their community Slack channel. I'd do it myself, but I'm just too depressed to go looking for the possibility of more problems to solve.

Thanks a lot for you help