airflow startup failed due to gunicorn

Question

Traceback (most recent call last):
  File "./python_runtime/bin/airflow", line 15, in <module>
    args.func(args)
  File "/home/admin/airflow/python_runtime/lib/python2.7/site-packages/airflow/bin/cli.py", line 423, in webserver
    'gunicorn', run_args
  File "/home/admin/airflow/python_runtime/lib/python2.7/os.py", line 346, in execvp
    _execvpe(file, args)
  File "/home/admin/airflow/python_runtime/lib/python2.7/os.py", line 385, in _execvpe
    func(fullname, *argrest)
OSError: [Errno 2] No such file or directory

I find out that this error was cause by no gunicorn avaiable,so I print all paths in os.py:

/home/admin/airflow/python_runtime/bin/gunicorn
/home/admin/python2.7.2/bin/gunicorn
/home/admin/tools/local/bin/gunicorn
/home/admin/tools/bin/gunicorn
/home/admin/tools/opsdb/gunicorn
/home/admin/odps_tools/dship/gunicorn
/home/admin/php/bin/gunicorn
/home/admin/cmake/bin/gunicorn
/home/admin/jdk1.6.0_24/bin/gunicorn
/home/admin/tools/bin/gunicorn
/usr/kerberos/bin/gunicorn
/usr/local/sbin/gunicorn
/usr/sbin/gunicorn
/sbin/gunicorn
/usr/local/bin/gunicorn
/bin/gunicorn
/usr/bin/gunicorn
/usr/X11R6/bin/gunicorn

while gunicorn exist in this path

/home/admin/airflow/python_runtime/bin/gunicorn

something wrong with my env?

Answer 1

Airflow seems to expect gunicorn in PATH. For my ubuntu instance this fixed it:

$ export PATH=$PATH:~/.local/bin $ airflow webserver