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yum install libxml2-devel
yum install libxslt-devel
yum install libffi-devel

# airflow needs a home, ~/airflow is the default,
# but you can lay foundation somewhere else if you prefer
# (optional)
export AIRFLOW_HOME=~/airflow

# install from pypi using pip
pip2 install numpy
pip2 install cython
pip2 install pandas
pip2 install airflow
pip2 install airflow[hive]
pip2 install airflow[mysql]
pip2 install airflow[celery]
pip2 install airflow[rabbitmq]
pip2 install airflow[crypto]
pip2 install airflow[password]
pip2 install celery
pip2 install flower

# initialize the database
airflow initdb

create database airflow default charset utf8;

>>>> sqlalchemy.exc.ProgrammingError: (_mysql_exceptions.ProgrammingError)

>>>> (1064, "You have an error in your SQL syntax; check the manual that

>>>> corresponds to your MySQL server version for the right syntax to use

>> near

>>>> '(6) NULL' at line 1") [SQL: u'ALTER TABLE dag MODIFY last_scheduler_run

>>>> DATETIME(6) NULL']

airflow/migrations/versions/4addfa1236f1_add_fractional_seconds_to_mysql_tables.py

airflow worker -D

airflow scheduler -D

# start the web server, default port is 8080
airflow webserver -p 8080 -D

airflow flower

$ cd ~/airflow
$ ls airflow.cfg  airflow.db  airflow-webserver.pid  unittests.cfg

$vim airflow.cfg

# Set to true to turn on authentication:
# http://pythonhosted.org/airflow/installation.html#web-authentication
#authenticate = False
authenticate = True
auth_backend = airflow.contrib.auth.backends.password_auth

import airflow

from airflow import models, settings
from airflow.contrib.auth.backends.password_auth import PasswordUser
user = PasswordUser(models.User())
user.username = 'your  usrename'
user.email = 'username@email.com'
user.password = 'your password'
session = settings.Session()
session.add(user)
session.commit()
session.close()
exit()