Airflow website address

http://airflow.apache.org/

System environment:

CentOS release 6.5 (Final)

python 2.7.13

pip 9.0.1

Problems emerge

Install airflow under the root user in the way of quick start on the official website

export AIRFLOW_HOME=~/airflow
pip install airflow
airflow initdb

All the above commands can be executed normally when airflow is started

/usr/local/python-2.7.13/bin/airflow webserver

Report the following error

[2017-06-30 09:24:01,609] {__init__.py:57} INFO - Using executor SequentialExecutor
  ____________       _____________
 ____    |__( )_________  __/__  /________      __
____  /| |_  /__  ___/_  /_ __  /_  __ \_ | /|//
___  ___ | /_ /  _  __/ _ // /_/ /_ |/ |/ /
 _/_/  |_/_/  /_/    /_/    /_/  \____/____/|__/

/usr/local/python/lib/python2.7/site-packages/flask/exthook.py:71: ExtDeprecationWarning: Importing flask.ext.cache is deprecated, use flask_cache instead.
  .format(x=modname), ExtDeprecationWarning
[2017-06-30 09:24:02,045] [29107] {models.py:167} INFO - Filling up the DagBag from /root/airflow/dags
Running the Gunicorn Server with:
Workers: 4 sync
Host: 0.0.0.0:8080
Timeout: 120
Logfiles: - -
=================================================================
Traceback (most recent call last):
  File "/usr/local/python/bin/airflow", line 28, in <module>
    args.func(args)
  File "/usr/local/python/lib/python2.7/site-packages/airflow/bin/cli.py", line 791, in webserver
    gunicorn_master_proc = subprocess.Popen(run_args)
  File "/usr/local/python/lib/python2.7/subprocess.py", line 390, in __init__
    errread, errwrite)
  File "/usr/local/python/lib/python2.7/subprocess.py", line 1024, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

Solutions

Configure /usr/local/python-2.7.13/bin/ to environment variables

export PATH=$PATH:/usr/local/python-2.7.13/bin/

Start ariflow again, the problem is solved.