I'm trying to set up a prefect server service from...
# ask-communitya
Albert Wong
03/13/2023, 5:40 PMI'm trying to set up a prefect server service from a virtual environment with
ExecStart=/home/ubuntu/apps/dataflows/venv/bin/prefect server start --host 0.0.0.0 Copy code
File "/home/ubuntu/.pyenv/versions/3.11.2/lib/python3.11/asyncio/base_subprocess.py", line 36, in __init__
self._start(args=args, shell=shell, stdin=stdin, stdout=stdout,
File "/home/ubuntu/.pyenv/versions/3.11.2/lib/python3.11/asyncio/unix_events.py", line 810, in _start
self._proc = subprocess.Popen(
^^^^^^^^^^^^^^^^^
File "/home/ubuntu/.pyenv/versions/3.11.2/lib/python3.11/subprocess.py", line 1024, in __init__
self._execute_child(args, executable, preexec_fn, close_fds,
File "/home/ubuntu/.pyenv/versions/3.11.2/lib/python3.11/subprocess.py", line 1901, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'uvicorn'ā
1
z
Zanie
03/13/2023, 5:43 PM
When you call
prefect server startZanie
03/13/2023, 5:43 PM
Sounds like uvicorn is not available on the path
a
Albert Wong
03/13/2023, 5:44 PMhhm, it starts fine on the command line after I start up the virtual environment. Is there some environment/variable that needs to be set?
Albert Wong
03/13/2023, 5:45 PMthis is what I see when I try to install the package:
Copy code
(venv) ubuntu@gbi-tableau-innovation:~/apps/dataflows$ pip install uvicorn
Requirement already satisfied: uvicorn in ./venv/lib/python3.11/site-packages (0.20.0)
Requirement already satisfied: click>=7.0 in ./venv/lib/python3.11/site-packages (from uvicorn) (8.1.3)
Requirement already satisfied: h11>=0.8 in ./venv/lib/python3.11/site-packages (from uvicorn) (0.14.0)z
Zanie
03/13/2023, 5:46 PM
It looks like you are calling `prefect `directly from the venv bin
Zanie
03/13/2023, 5:46 PM
Instead of activating the environment then calling Prefect
Zanie
03/13/2023, 5:46 PM
So nothing else from the venv will be on the path
Zanie
03/13/2023, 5:48 PM
Iād take a look at the contents of
.venv/bin/activatea
Albert Wong
03/13/2023, 5:51 PMyeah, that's sort of the recommendation for running daemons in virtual environments based on what I've read, but makes sense and thanks for the direction. I'll see if there's something I can do on the systemd side, else just wrap the whole thing in a script that starts the virtual environment before running the server
Albert Wong
03/13/2023, 6:14 PMYup, looks like there's an Environment variable I can set in the service script:
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Environment="PATH=/home/ubuntu/apps/dataflows/venv/bin:$PATH"š 1