G. Geijteman created AIRFLOW-2873:
-------------------------------------
Summary: Improvements to Quick Start flow
Key: AIRFLOW-2873
URL: https://issues.apache.org/jira/browse/AIRFLOW-2873
Project: Apache Airflow
Issue Type: Improvement
Components: configuration
Affects Versions: Airflow 1.9.0
Reporter: G. Geijteman
Thank you for developing Airflow!
Having ran through the Quick Start, i've come across two issues that I would
like to highlight:
{code:java}
bash-3.2$ cd ~/project/airflow/
bash-3.2$ export AIRFLOW_HOME=~/project/airflow
bash-3.2$ python3 -m venv $AIRFLOW_HOME/venv
bash-3.2$ source venv/bin/activate
(venv) bash-3.2$ pip install --upgrade pip
(venv) bash-3.2$ uname -a Darwin mac.local 17.7.0 Darwin Kernel Version 17.7.0:
Thu Jun 21 22:53:14 PDT 2018; root:xnu-4570.71.2~1/RELEASE_X86_64 x86_64
(venv) bash-3.2$ python -V
Python 3.6.5
(venv) bash-3.2$ pip -V
pip 18.0 from ~/project/airflow/venv/lib/python3.6/site-packages/pip (python
3.6)
(venv) bash-3.2$ pip install apache-airflow[redis,postgres] -U {code}
Results in:
{code:java}
During handling of the above exception, another exception occurred:Traceback
(most recent call last):
File "~/project/airflow/venv/lib/python3.6/site-packages/airflow/models.py",
line 639, in set_extra
fernet = get_fernet()
File "~/project/airflow/venv/lib/python3.6/site-packages/airflow/models.py",
line 103, in get_fernet
raise AirflowException('Failed to import Fernet, it may not be installed')
airflow.exceptions.AirflowException: Failed to import Fernet, it may not be
installed
[2018-08-08 10:49:01,121]{models.py:643}ERROR - Failed to load fernet while
encrypting value, using non-encrypted value.
Traceback (most recent call last):
File "~/project/airflow/venv/lib/python3.6/site-packages/airflow/models.py",
line 101, in get_fernet
from cryptography.fernet import Fernet
ModuleNotFoundError: No module named 'cryptography'{code}
This is solved by:
{code:java}
(venv) bash-3.2$ pip install cryptography{code}
*Proposed fix:*
_Include the `cryptography` package_
Having fixed that, the following issue occurs when trying to:
{code:java}
(venv) bash-3.2$ airflow initdb{code}
Exempt:
{code:java}
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "~/project/airflow/venv/lib/python3.6/site-packages/airflow/models.py",
line 639, in set_extra
fernet = get_fernet()
File "~/project/airflow/venv/lib/python3.6/site-packages/airflow/models.py",
line 107, in get_fernet
raise AirflowException("Could not create Fernet object: {}".format(ve))
airflow.exceptions.AirflowException: Could not create Fernet object: Incorrect
padding
[2018-08-08 10:50:50,697]
{models.py:643}
ERROR - Failed to load fernet while encrypting value, using non-encrypted value.
Traceback (most recent call last):
File "~/project/airflow/venv/lib/python3.6/site-packages/airflow/models.py",
line 105, in get_fernet
return Fernet(configuration.get('core', 'FERNET_KEY').encode('utf-8'))
File
"~/project/airflow/venv/lib/python3.6/site-packages/cryptography/fernet.py",
line 34, in _init_
key = base64.urlsafe_b64decode(key)
File
"/usr/local/Cellar/python/3.6.5_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/base64.py",
line 133, in urlsafe_b64decode
return b64decode(s)
File
"/usr/local/Cellar/python/3.6.5_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/base64.py",
line 87, in b64decode
return binascii.a2b_base64(s)
binascii.Error: Incorrect padding{code}
Which after some googling leads to the conclusion that the
~/project/airflow/airflow.cfg fernet_key field is not set to the correct value.
*Feature request:*
_Have the setup automatically generate a valid fernet key for the user._
The fact that this page exists: [https://bcb.github.io/airflow/fernet-key]
suggests this could easily be a part of the package.
I understand that this project is in incubator phase, but I would say having a
quick start that is not working as-is will discourage users from trying out
this project. Thank you for considering.
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