Can't run Flask app with gunicorn like service

Question

I'm trying to make a service with run my Flask app with Gunicorn. Service file look like this:

[Unit]
Description=metrofind
After=network.target

[Service]
User=ubuntu
Group=ubuntu
Restart=on-failure
WorkingDirectory=/home/ubuntu/geoMetroFinding/
ExecStart=/home/ubuntu/geoMetroFinding/flaskenv/bin/gunicorn -c /home/ubuntu/geoMetroFinding/gunicorn.conf -b 0.0.0.0:5000 main_flask:app

[Install]
WantedBy=multi-user.target

in the log-error file it writes:

ImportError: No module named 'pandas'

or

ImportError: No module named 'main_flask'

but in virtual env, all necessary packages were installed.

And when I run locally from directory "geoMetroFinding" in console this command:

  gunicorn -c gunicorn.conf -b 0.0.0.0:5000 main_flask:app

App is running

What is wrong?

Answer 1

You have to set the environment in the service file.

An example of the [Service] section would be like this:

[Service]
User=ubuntu
Group=ubuntu
Restart=on-failure
WorkingDirectory=/home/ubuntu/geoMetroFinding/
Environment="PATH=/home/ubuntu/geoMetroFinding/flaskenv/bin"
ExecStart=/home/ubuntu/geoMetroFinding/flaskenv/bin/gunicorn -c /home/ubuntu/geoMetroFinding/gunicorn.conf -b 0.0.0.0:5000 main_flask:app

So you need to add the Environment to your PATH in order to make this work.

Take a look at this great tutorial for more info.