Hey I m trying to create a remote deployment using the follo Prefect Community #ask-community

Hey, I'm trying to create a remote deployment usin...

Luke Dolan

06/28/2023, 10:11 AM

Hey, I'm trying to create a remote deployment using the following

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import os
from prefect.deployments import Deployment
from prefect.filesystems import LocalFileSystem

os.environ['PREFECT_API_URL'] = f'http://<remote_host>:4200/api'
local_file_system_block = LocalFileSystem.load('local-system')
deployment = Deployment.build_from_flow(...)
deployment.apply

However find that it doesn't seem to utilise the environ variable and instead hits the ephemeral-prefect host rather than the <remote_host> is this expected? setting this by

prefect config set PREFECT_API_URL=http://<remote_host>:4200/api

works however

Nico Neumann

06/28/2023, 10:18 AM

Can you try to set the ENV variable before importing any prefect code? I think prefect does not really support changing ENV variables during runtime/after prefect imports

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import os
os.environ['PREFECT_API_URL'] = f'http://<remote_host>:4200/api'

from prefect.deployments import Deployment
from prefect.filesystems import LocalFileSystem

...

Luke Dolan

06/28/2023, 10:33 AM

Indeed worked, do you know if there is a way to reload in the case that I don't want to do a late import? Otherwise can fall back to importing in my function

❌ 1

Luke Dolan

07/05/2023, 9:16 PM

Interesting from the docs

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The SettingsContext is set when the prefect module is imported. This context is referred to as the "root" settings context for clarity. Generally, this is the only settings context that will be used. When this context is entered, we will instantiate a Settings object, loading settings from environment variables and defaults, then we will load the active profile and use it to override settings.

So the settings are loaded on import

Luke Dolan

07/05/2023, 9:16 PM

Same docs mention

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Another SettingsContext may be entered at any time to change the settings being used by the code within the context. Generally, users should not use this. Settings management should be left to Prefect application internals.

Luke Dolan

07/05/2023, 9:35 PM

For those following along I got around this with

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with prefect.settings.temporary_settings(updates={prefect.settings.PREFECT_API_URL: '<http://xxx.xxx.com:4200/api'}>):
    local_file_system_block = LocalFileSystem.load('local-system')
    deployment = Deployment.build_from_flow(...)
    deployment.apply

And this was the docs from the API that made it clear

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>>> from prefect.settings import PREFECT_API_URL
        >>>
        >>> with temporary_settings(updates={PREFECT_API_URL: "foo"}):
        >>>    assert PREFECT_API_URL.value() == "foo"

🙏 1

Nico Neumann

07/05/2023, 11:39 PM

Oh that’s a nice find, thanks for sharing!

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