====== Airflow ======

Dependencis:
<code bash>
yum install gcc python python-devel MariaDB MariaDB-devel gcc-c++ cyrus-sasl-devel
pip install airflow
pip install airflow[devel,devel_hadoop,jdbc,hdfs,mysql]
</code>

http://pythonhosted.org/airflow/start.html
<code bash>
export AIRFLOW_HOME=~/airflow

# install from pypi using pip
pip install airflow

# initialize the database
airflow initdb

# start the web server, default port is 8080
airflow webserver -p 8080
</code>