A. SetUp https://medium.com/international-school-of-ai-data-science/setting-up-apache-airflow-in-ubuntu-324cfcee1427

1. set up virtualenv
2. in the activated virtualenv, install airflow via "pip3 install apache-airflow[gcp,sentry,statsd]"
3. install sklearn if needed via "pip3 install pyspark"
4. Set AIRFLOW_HOME environment variable to the current working directory via ' export AIRFLOW_HOME="$(pwd)" ' DB: sqlite:////home/samuel/airflow/airflow.db
5. navigate to airflow_learning/airflow. Then run the command "airflow db init". This creates the logs folder, a config file(airflow.cfg) and airflow.db
6. If running for the first time, create a user. airflow users create --username admin --password root --firstname your_first_name --lastname your_last_name --role Admin --email your_email@domain.com
7. verify username via "airflow users list"
8. start airflow scheduler -- "airflow scheduler"
9. open a new terminal, activate the virtualenv, navigate to airflow folder and start the webserver "airflow webserver"
10. navigate to "localhost:8080"