Hi here, how can I run same subflow multiple times parallely?

I feel like this is a Noob question but I can't find an answer. Is there a way to make prefect server restart automatically after reboots? The documentation mentions using supervisord for agents on this, but there don't seem to be any equivalent instructions for server. The closest I found was another thread on here that seems to use

prefect server config

to generate a docker compose file, and I'm partway down the path of trying to set that up to auto-start (still working through https://github.com/flavienbwk/prefect-docker-compose, which was linked in it), but so far it's not working and it seems like there should be a simpler answer here. Docker has restart policies already (https://docs.docker.com/config/containers/start-containers-automatically/), is there not some flag I can pass to

prefect server start

to use them?

Hi Folks, what is the current approach to “force interrupt” a flow and its tasks when cancelling? The reason I ask is currently when one sets the state of the flow as “Cancelled” - prefect will try to cancel the running tasks gracefully (i.e. wait for the task to complete before cancelling).

Can lists be passed as parameters through the UI to your flow? It seems like when I do this, they get converted to a string, which I am not sure if this is the intended behavior. However, when i set a Parameter value to a list (e.g.

Parameter('abc', default=[1, 2, 3])

) in my python code it's fine.

i keep getting RuntimeError: Failed to reach API at http://127.0.0.1:4200 when i run my prefect flow. In my profiles.toml, i have set the PREFECT_API_URL. but i still keep getting the same error. I am currently using prefect==3.0.8

Hello, team Prefect! I wonder if there is a way to use SSO in Prefect Server? And to be more precise I’m interested in Okta as SSO provider. Or this feature is only available in Prefect Cloud Enterprise? Thank you

@Marvin I am using Prefect 3 locally using docker to run the server, and then for each flow, we deplpoy to docker (local). It was working before but now it's not after rebooting my machine. I think it's due to the DOCKER_HOST env variable (whcih is not set currently). I am on MacOS and Docker Desktop is running. Flow deploy co

ctos_monitoring_list_flow.deploy(
            name=config["name"],
            work_pool_name="local-docker-work-pool",
            work_queue_name="ctos-monitoring-list-queue",
            image=DockerImage(
                name="prefecthq/prefect", tag="3-latest", dockerfile="Dockerfile.worker"
            ),
            parameters=config["params"],
            cron=config["schedule"],
            job_variables={"networks": ["dmp_default", "dmp-etl-prefect_default"]},
            push=False,
            build=True,
        )

Error when trying to deploy:

The above exception was the direct cause of the following exception:

...
  File "/Users/cdrum/Development/alternatives/dmp-etl-prefect/dmp-etl-venv/lib/python3.13/site-packages/prefect/utilities/dockerutils.py", line 166, in build_image
    with docker_client() as client:
         ~~~~~~~~~~~~~^^
  File "/opt/homebrew/Cellar/python@3.13/3.13.0_1/Frameworks/Python.framework/Versions/3.13/lib/python3.13/contextlib.py", line 141, in __enter__
    return next(self.gen)
  File "/Users/cdrum/Development/alternatives/dmp-etl-prefect/dmp-etl-venv/lib/python3.13/site-packages/prefect/utilities/dockerutils.py", line 115, in docker_client
    raise RuntimeError(
        "This error is often thrown because Docker is not running. Please ensure Docker is running."
    ) from exc
RuntimeError: This error is often thrown because Docker is not running. Please ensure Docker is running.

can anyone help me shed some light on this warning and what might be wrong?

13:22:08.805 | WARNING | prefect.events.clients - Unable to connect to '<wss://workflows.arte.adobe.net/api/events/in>'. Please check your network settings to ensure websocket connections to the API are allowed. Otherwise event data (including task run data) may be lost. Reason: server rejected WebSocket connection: HTTP 403. Set PREFECT_DEBUG_MODE=1 to see the full error.
13:22:08.805 | ERROR   | GlobalEventLoopThread | prefect._internal.concurrency - Service 'EventsWorker' failed with 11 pending items.

full output in thread

Hi all, I'm having an issue authenticating to Prefect through

prefect cloud login

. If I do browser authentication it goes through the process, says successful and then aborts in terminal without asking me to select workspace. I also tried

prefect cloud login -k <key> -w <handle>/<workspace>

which just returns

"Unable to authenticate with Prefect Cloud. Your key is not in our expected format."

This is happening on one of my EC2 servers. Locally it is fine, I can authenticate with web browser authentication and it asks me to select workspace. Version is 2.10.21. What could be the issue? @Marvin

Hi, do we still have SequentialTaskRunner in any form in Prefect 3.0.0? I couldn't find it, and not specifying task runner shows concurrent behaviour.