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From "jack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AIRFLOW-2873) Improvements to Quick Start flow
Date Tue, 16 Oct 2018 13:45:00 GMT

    [ https://issues.apache.org/jira/browse/AIRFLOW-2873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16651717#comment-16651717
] 

jack commented on AIRFLOW-2873:
-------------------------------

[~ggeijteman] I believe this is needed for the example DAGs

> 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: 1.9.0
>            Reporter: G. Geijteman
>            Priority: Major
>
> Thank you for developing Airflow!
> Having ran through the [Quick Start|https://airflow.incubator.apache.org/start.html],
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 in the setup / package requirements_
>  
> 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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