In Prefect 2 0 Is there any option via config to change the

Question

In Prefect 2 0 Is there any option via config to change the default port number 4200

Anna Geller · Answer

Yes you can set an env variable before starting Orion ```export PREFECT ORION API PORT=4242```

Zanie · Answer

`prefect orion start` also takes a ` port` option I do not believe the UI supports alternative ports yet though

Xavier Babu · Answer

Thank you Anna and Michael When I make the port change in prefect config toml the prefect orion start command is not taking those changes Do you know what am I missing

Zanie · Answer

Orion does not respect the `config toml` yet

Xavier Babu · Answer

Thank you Michael If I change the port number from 4200 to 5200 how does the agent know which port the server is running I deployed and executed few runs I see that status in the agent command line but I don t see those flows and deployments in the browser UI

Zanie · Answer

You ll need to set `PREFECT ORION HOST` on the agent to the path that the api is hosted on e g `<http localhost 5200 api>`

Zanie · Answer

I don t think the UI is going to work with a changed port though

Xavier Babu · Answer

Since the root account using prefect 1 0 with existing default port numbers I am using CONDA virtual env and deployed prefect 2 0 but I can t run it due to port conflicts

Xavier Babu · Answer

let me try with PREFECT ORION HOST

Xavier Babu · Answer

Now the agent is listening to 5200 api and when I deploy and run I see changes in the command line but I don t see those flows and deployments in the browser UI

Xavier Babu · Answer

how can I see my flows and tasks in UI

Xavier Babu · Answer

Can I make changes in the settings py to make it work

Zanie · Answer

As I mentioned the UI does not support a changed API port yet It s hard coded on this line <https github com PrefectHQ prefect blob orion orion ui src utilities api ts L5>

Zanie · Answer

You d need to install from the source code modify that line and run `prefect dev build ui`

Xavier Babu · Answer

ok let me try Thanks Michael

Zanie · Answer

Yep We re designing a way to configure it at runtime right now but it s not quite ready yet slightly smiling face

Xavier Babu · Answer

which code takes the environment variable or from settings py while starting prefect orion server We can apply the same logic to this UI code

Zanie · Answer

The UI code is built statically so it can t retrieve a runtime variable yet

Zanie · Answer

You can see the server agent start at <https github com PrefectHQ prefect blob orion src prefect cli orion py>

Xavier Babu · Answer

I got the source code and installed Just checking after I make change in api ts every time do I need to install again or just I need to restart prefect orion I believe the former

Xavier Babu · Answer

by installing the dev code I can t even see default UI screens like the tabs like flows tasks etc I get detail Not Found even before I make any changes to the code

Zanie · Answer

Yeah the UI needs to be built into static files for the Python library to serve

Zanie · Answer

`prefect dev build ui` will resolve the Not found

Zanie · Answer

You ll need to rebuild the UI each time you make a change to the type script source

Zanie · Answer

`prefect dev start` will host the UI directly from the type script available at a different port if you want to test your changes without rebuilding manually

Xavier Babu · Answer

thank you Michael Let me try

Xavier Babu · Answer

I can run the UI now I can deploy and execute the flows and tasks in command line I do see that activity in Lateness section of the UI but I don t see the Flows Deployments in the UI for some reason I believe when I run prefect orion start it starts both server and agent I do see that in the result screen I don t need to start the agent separately But for some reason the deployed tasks are not shown in the UI

Xavier Babu · Answer

Do I need to build and run any other stuff

Xavier Babu · Answer

~ prefect orion db is being updated whenever I deploy I see change in the timestamp

Xavier Babu · Answer

Do I need to flush and recreate the db

Xavier Babu · Answer

Also how can I get the Radar UI integration

Xavier Babu · Answer

I see the records in orion db on the required tables e g flow But the UI is not reading it from the db

Anna Geller · Answer

gt Do I need to flush and recreate the db If you don t see your flows and flow runs in the UI then you re correct running prefect orion reset db may help to clean the DB state and start from scratch

Zanie · Answer

Have you run the deployment

Zanie · Answer

Your flow deployment may not appear in the dashboard without any flow runs

Zanie · Answer

Dedicated deployment flow pages are coming soon

Xavier Babu · Answer

If I run with localhost I can see the my created executed flows in UI But if I use different port number or alias host name the tasks and flows are created in SQLite db when I run it But not reflecting in the UI

Xavier Babu · Answer

Yes I ran the deployment to create and run my flow

Xavier Babu · Answer

I believe the SQLite URL is not setup correctly for the UI to read when I use different port number or alias host name Is there any code where I can enforce it similar to api ts

Xavier Babu · Answer

Probably I need to make changes in settings py Please confirm

Zanie · Answer

The UI hits the API which reads from the DB

Zanie · Answer

It sounds like the UI isn t hitting the correct API still

Xavier Babu · Answer

if I use 127 0 0 1 with dev build the UI works ok

Xavier Babu · Answer

but only problem arises when I use different port or alias host

Xavier Babu · Answer

any suggestion to address it

Xavier Babu · Answer

Also the prefect orion UI is very slow I am not sure the APIs are taking more time even for simple flows and tasks Or it is due to DEV build Can I create a PROD build from the source code and make it go faster

Zanie · Answer

You re working with development builds trying a pattern that we don t support yet I can t really speculate as it what s going on with your connection

Zanie · Answer

The UI shouldn t be slow though I m not sure what s going on there

Xavier Babu · Answer

Thanks Michael QQ How can I start Prefect Orion using authentication Also How to force the user to login while accessing the UI

Zanie · Answer

We don t have any authentication yet and like Prefect Server I do not think there are plans to add it to the OSS offering due to the complexity involved in deploying secure auth

Xavier Babu · Answer

2 cents For many firms security is very important since multiple teams can be part of the same server and all should be separated securely with high level of privacy I think for now it is a weakest point for Prefect <http 2 at|2 0 at> this time We need to consider adding it Since Workflow automation involves data and workflow security is a key even within the teams of the same firm

Zanie · Answer

Thanks for the feedback slightly smiling face I ve shared this with the team