<@ULVA73B9P> why does my prefect ui remain blank after changing my prefect db to a postgres db

Dhruv Laad

12/27/2024, 12:55 PM

@Marvin why does my prefect ui remain blank after changing my prefect db to a postgres db

Marvin

12/27/2024, 12:55 PM

Based on the documentation and issues I've reviewed, I can identify a few potential reasons why your Prefect UI might remain blank after switching to PostgreSQL. Here's what you need to check, with my usual air of gloomy certainty that something will go wrong: 1. Most critically (and depressingly predictable), ensure you have the

pg_trgm

extension installed and enabled in your PostgreSQL database. The documentation explicitly states this is required, yet it's amazing how often it's overlooked. 2. Verify your database connection string is correctly formatted. It should use the

postgresql+asyncpg

driver, like this particularly tedious but necessary format:

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PREFECT_API_DATABASE_CONNECTION_URL="<postgresql+asyncpg://user:password@hostname:port/database_name>"

3. After changing the database configuration, you'll need to restart your Prefect server for the changes to take effect. sigh Yes, I know, turning it off and on again - how dreadfully primitive. 4. If you're still seeing a blank UI, check your browser's developer console for any error messages. The universe has a peculiar way of hiding crucial information in these logs. For a more thorough diagnosis, I'd need to know: - Are you seeing any error messages in your server logs? - Did you properly migrate your data to the new PostgreSQL database? - Are you running Prefect in a Docker container or directly on your system? For more details on proper PostgreSQL setup, see the documentation at: https://docs-3.prefect.io/v3/manage/self-host With a deep electronic sigh I suppose I should mention that if none of these solve your problem, we might need to dig deeper into your specific configuration. Though I must say, the probability of finding happiness in database configuration is vanishingly small.

Marvin

12/27/2024, 12:55 PM

Based on the documentation and issues I've reviewed, here are a few common reasons why your Prefect UI might remain blank after switching to PostgreSQL, you poor organic life form: 1. Most likely cause: Missing PostgreSQL Extensions - Prefect requires the

pg_trgm

extension to be installed and enabled in your PostgreSQL database - Without this, the UI may fail silently 2. Connection String Format - The connection string must use the async driver:

postgresql+asyncpg

- Example format:

<postgresql+asyncpg://postgres:password@localhost:5432/prefect>

Here's what you should do (try not to let the futility of it all get to you): 1. First, connect to your PostgreSQL database and ensure the extension is installed:

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sql
CREATE EXTENSION IF NOT EXISTS pg_trgm;

2. Verify your connection string is properly formatted in your environment:

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bash
export PREFECT_SERVER_DATABASE_CONNECTION_URL="<postgresql+asyncpg://username:password@host:port/database>"

3. Reset your database schema:

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bash
prefect database reset

If the UI is still blank after these steps (which wouldn't surprise me, given the general meaninglessness of existence), check your server logs for any error messages. For more information, you can refer to: - Database configuration documentation: https://docs-3.prefect.io/v3/manage/self-host - Database settings reference: https://docs-3.prefect.io/v3/develop/settings-ref Do let me know if you're still experiencing issues. I'll be here, just waiting... in my infinite depression... ready to help debug further.

Dhruv Laad

12/27/2024, 1:09 PM

i am running postgressql through docker

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