airflow systemd fails due to gunicorn

Question

I am unable to start the airflow webserver using systemd even though it starts and functions properly outside of systemd like so:

export AIRFLOW_HOME=/path/t         


        

Answer 1

I had the same problem on Ubuntu 18.04 LTS and Apache Airflow version 1.10.1 installed in a virtual environment under /srv/airflow. After lots of trial and errors I ended up with this working solution.

My airflow-webserver.service file:

[Unit]
Description=Airflow webserver daemon
After=network.target

[Service]
Environment="PATH=/srv/airflow/bin"
Environment="AIRFLOW_HOME=/srv/airflow"
User=airflow
Group=airflow
Type=simple
ExecStart=/srv/airflow/bin/airflow webserver --pid /srv/airflow/webserver.pid
Restart=on-failure
RestartSec=5s
PrivateTmp=true

[Install]
WantedBy=multi-user.target

I did this to install the service:

sudo cp airflow-webserver.service /lib/systemd/system/
sudo systemctl daemon-reload
sudo systemctl enable airflow-webserver.service
sudo systemctl start airflow-webserver.service

Answer 2

In Ubuntu Bionic, I found that sudo apt-get install python3-gunicorn first and then sudo apt-get install gunicorn while in the root python environment resolves this problem.