Michael Backes created AIRFLOW-1970:
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Summary: Database cannot be initialized if an invalid fernet key
is provided
Key: AIRFLOW-1970
URL: https://issues.apache.org/jira/browse/AIRFLOW-1970
Project: Apache Airflow
Issue Type: Bug
Components: configuration
Affects Versions: 1.9.0
Environment: Python 2.7.12
PostgreSQL 9.6.3
Reporter: Michael Backes
If I use an invalid fernet key in my config file, I'm not able to run "airflow
initdb" successfully.
For example if I have the following in my config:
{panel:title=airflow.cfg}
...
# Secret key to save connection passwords in the db
fernet_key = xxx
...
{panel}
I will get the following error when running "airflow initdb":
[2018-01-05 16:43:00,525] {__init__.py:45} INFO - Using executor LocalExecutor
DB: postgresql+psycopg2://airflow_user:[email protected]:5432/airflow
[2018-01-05 16:43:00,624] {db.py:312} INFO - Creating tables
INFO [alembic.runtime.migration] Context impl PostgresqlImpl.
INFO [alembic.runtime.migration] Will assume transactional DDL.
Traceback (most recent call last):
File "/usr/local/bin/airflow", line 27, in <module>
args.func(args)
File "/usr/local/lib/python2.7/site-packages/airflow/bin/cli.py", line 897,
in initdb
db_utils.initdb()
File "/usr/local/lib/python2.7/site-packages/airflow/utils/db.py", line 114,
in initdb
schema='airflow_ci'))
File "<string>", line 4, in __init__
File "/usr/local/lib64/python2.7/site-packages/sqlalchemy/orm/state.py", line
414, in _initialize_instance
manager.dispatch.init_failure(self, args, kwargs)
File
"/usr/local/lib64/python2.7/site-packages/sqlalchemy/util/langhelpers.py", line
66, in __exit__
compat.reraise(exc_type, exc_value, exc_tb)
File "/usr/local/lib64/python2.7/site-packages/sqlalchemy/orm/state.py", line
411, in _initialize_instance
return manager.original_init(*mixed[1:], **kwargs)
File "/usr/local/lib/python2.7/site-packages/airflow/models.py", line 578, in
__init__
self.extra = extra
File "<string>", line 1, in __set__
File "/usr/local/lib/python2.7/site-packages/airflow/models.py", line 639, in
set_extra
fernet = get_fernet()
File "/usr/local/lib/python2.7/site-packages/airflow/models.py", line 105, in
get_fernet
return Fernet(configuration.get('core', 'FERNET_KEY').encode('utf-8'))
File "/usr/local/lib64/python2.7/site-packages/cryptography/fernet.py", line
34, in __init__
key = base64.urlsafe_b64decode(key)
File "/usr/lib64/python2.7/base64.py", line 119, in urlsafe_b64decode
return b64decode(s.translate(_urlsafe_decode_translation))
File "/usr/lib64/python2.7/base64.py", line 78, in b64decode
raise TypeError(msg)
TypeError: Incorrect padding
{panel}
I also got an error when I try to add extras to a connection, if fernet_key is
empty in the config file. The error message was "Incorrect padding". Once I
provided a valid key generated with the instructions given
[here|http://airflow.readthedocs.io/en/latest/configuration.html?highlight=fernet#connections]
and restarted all of the airflow services it worked without any issues.
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