I m running prefect server on a EC2 machine using ` expose` Prefect Community #prefect-server

I'm running prefect server on a EC2 machine using ...

Jeff Kehler

05/11/2022, 3:09 AM

I'm running prefect server on a EC2 machine using

--expose

and connecting to the UI using the server IP address on port

. All that works fine, however I noticed that the url in Slack notifications are using

<http://localhost:4200>

. How can I configure this part?

Jeff Kehler

05/11/2022, 3:10 AM

What is also confusing about this is that the docker output for prefect server shows

Visit <http://localhost:8080> to get started

. So why does the Slack url differ in port?

Jeff Kehler

05/11/2022, 4:02 AM

I saw this code in https://github.com/PrefectHQ/server/blob/1acf3a83134b892aef828440bc9ef46e487b7b5c/src/prefect_server/api/cloud_hooks.py#L255

Copy code

message_link = (
        f"{server_config.api.url}/{event.tenant.slug}/flow-run/{event.flow_run.id}"
    )

I guess my question is why is it using the API url instead of the UI url? Since the link should be to the web UI not to the API.

Kevin Kho

05/11/2022, 4:46 AM

4200 is where the API lives, not necessarily Slack messages. You connect to the UI externally, but the UI makes requests to the configured. So this shouldn’t be pointing to the UI, it should be pointing to the API. This should be configured where the flow is running.

Jeff Kehler

05/11/2022, 5:42 AM

Maybe I need to give a bit more context with a screenshot. I've configured a Slack Cloud Hook on a Flow to trigger on a Failed state. And this is what the Slack notification looks like. So the issue I'm encountering is that the

Link

doesn't actually link to the Web UI. Since the Web UI is hosted on port 8080. Port 4200 is for the API. Also the link should not be

localhost

but rather the server IP.

Jeff Kehler

05/11/2022, 5:43 AM

But the link there is clearly intended to be a UI link not an API link.

Anna Geller

05/11/2022, 2:09 PM

are you just getting started with Prefect? you may start with Prefect 2.0 prefect2 directly rather than with Prefect Server

Jeff Kehler

05/12/2022, 3:23 AM

I think I would prefer to stay with 1.0 branch for now at least until 2.0 is out of beta phase. So I guess my question still stands. Is this the intended behavior of the Slack cloud hook to pass an API url rather than a UI url? Or is this a bug?

Anna Geller

05/12/2022, 9:31 AM

I see what you mean: it should be port 8080 in the URL rather than 4200? if so, yes likely a bug. If you'd like to contribute a fix, it's in Server repo under Cloud Hooks. Well-spotted and you're right it should be 8080 to point to the UI

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