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```

Michael Adkins · 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

Michael Adkins · 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

Michael Adkins · 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>`

Michael Adkins · 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

Michael Adkins · 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>

Michael Adkins · 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

Michael Adkins · 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

Michael Adkins · Answer

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

Michael Adkins · 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

Michael Adkins · Answer

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

Michael Adkins · Answer

`prefect dev build ui` will resolve the Not found

Michael Adkins · Answer

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

Michael Adkins · 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

Michael Adkins · Answer

Have you run the deployment

Michael Adkins · Answer

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

Michael Adkins · 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

Michael Adkins · Answer

The UI hits the API which reads from the DB

Michael Adkins · 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

Michael Adkins · 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

Michael Adkins · 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

Michael Adkins · 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

Michael Adkins · Answer

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