Hi again, I want to run my first flow linked to my local API and I am trying to run

client.create_project()

to create a project. But each time I get the following error :

requests.exceptions.HTTPError: 400 Client Error: Bad Request for url: <http://xxx.xxx.xxx.xxx:4200/graphq>

My code :

client = Client(api_server="<http://xxx.xxx.xxx.xxx:4200/graphql>")
client.create_project(project_name="weather")

I don't understand what port / URL I should put in

Client()

. Thank you for your help.

Hi @flavienbwk - how did you end up setting up Prefect Server? I know you mentioned that you intended to make some changes to a custom

docker-compose.yaml

Yes : so I've copied the Prefect docker-compose.yml without making any modification to it. I've just created a .env aside replicating the env variables from the compose file. You can see it here : https://github.com/flavienbwk/prefect-docker-compose/tree/main/server It's working well! I've managed to make it run for agents too. So now I want to create my first flow but I don't understand what parameter I should give to my flow to register it to my Prefect API (which is in a specific IP, not

localhost

).

Got it. In the case you'll need to provide that specific IP to the

api_server

, pointing it at the

:4200/graphql

endpoint. Another option is to set this in your local machine's

~/.prefect/config.toml

like this:

[server]
endpoint="<http://your_ip:4200/graphql>"

Yeah !! Unfortunately that's exactly what I pass to Client() :

Client(api_server="<http://192.168.254.1:4200/graphql>")

Getting :

requests.exceptions.HTTPError: 400 Client Error: Bad Request for url: <http://192.168.254.1:4200/graphql>

😞

Can you confirm that that endpoint is available from your browser? You can just paste the address and you should see something like

GET query is missing

When going to

<http://192.168.254.1:4200/graphql>

in my browser, I get the whole GraphQL interface

Ah ok perfect! That means it's running there. Are you running that code above from within any sort of container that might not have access to that endpoint?

I run my scrip from a container yes. However, it seems to have access as it returns the response immediately. When I change the endpoint to an inexistant IP, it just times out. Moreover, I use the same container architecture for my agents. And I've tried entering my container, curling the URL, and it returns

GET query missing.

Got it. Can you try running

prefect backend server

and then re-running your script?

I am getting another error now :

prefect.utilities.exceptions.ClientError: [{'message': 'Uniqueness violation.'

, I guess it worked ! 😄

Perfect!

OK thank you!

Did you set the

endpoint

in

~/.prefect/config.toml

as I mentioned above?

Yes, adding the

PREFECT_SERVER_ENDPOINT

env variable didn't have effect. Is it the way of doing ? By changing the env variables ? I'll investigate more if it is the case. What I don't understand is why I'm allowed to specify api_server=my_ip for Client(), but not for Flow()

Internally

flow.register

is creating an instance of

Client()

- I'm not sure the environment variable has an effect in that case

I confirm. I was forced to create the

config.toml

in order for my script to use a custom API endpoint. Is it intentional ?

Yes, that's correct - not all configuration options are read in from environment variables, particularly those meant for custom Server deployments.

Thank you for all your quick answers!