[jira] [Commented] (AIRFLOW-4347) airflow webserver can not load webserver_config.py

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AIRFLOW-4347?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17135834#comment-17135834 ] 

ASF GitHub Bot commented on AIRFLOW-4347:
-----------------------------------------

WesleyBatista commented on pull request #5129:
URL: https://github.com/apache/airflow/pull/5129#issuecomment-644120848


   I also experienced this problem.
   
   The airflow installation was working fine until I started enabling RBAC.
   
   It is quite annoying to realize that this happens due to `AIRFLOW_HOME` being set as:
   
   ```
   export AIRFLOW_HOME=./airflow-home
   ```
   
   **RBAC** **UI** currently requires **`AIRFLOW_HOME`** to be an absolute path, otherwise it fails silently with `FileNotFoundError`:
   
   ```
   $ airflow webserver
   jjdksjds
   jjdksjds
     ____________       _____________
    ____    |__( )_________  __/__  /________      __
   ____  /| |_  /__  ___/_  /_ __  /_  __ \_ | /| / /
   ___  ___ |  / _  /   _  __/ _  / / /_/ /_ |/ |/ /
    _/_/  |_/_/  /_/    /_/    /_/  \____/____/|__/
   dlkshdlkjshldkjshlkajhdlkjsahlkjd
   ./airflow-home/webserver_config.py
   Traceback (most recent call last):
     File "/home/wesley/devel/airflow-rbac/venv/bin/airflow", line 37, in <module>
       args.func(args)
     File "/home/wesley/devel/airflow-rbac/venv/lib/python3.7/site-packages/airflow/utils/cli.py", line 75, in wrapper
       return f(*args, **kwargs)
     File "/home/wesley/devel/airflow-rbac/venv/lib/python3.7/site-packages/airflow/bin/cli.py", line 900, in webserver
       app = cached_app_rbac(None) if settings.RBAC else cached_app(None)
     File "/home/wesley/devel/airflow-rbac/venv/lib/python3.7/site-packages/airflow/www_rbac/app.py", line 298, in cached_app
       app, _ = create_app(config, session, testing)
     File "/home/wesley/devel/airflow-rbac/venv/lib/python3.7/site-packages/airflow/www_rbac/app.py", line 66, in create_app
       app.config.from_pyfile(settings.WEBSERVER_CONFIG)
     File "/home/wesley/devel/airflow-rbac/venv/lib/python3.7/site-packages/flask/config.py", line 131, in from_pyfile
       with open(filename, mode="rb") as config_file:
   FileNotFoundError: [Errno 2] Unable to load configuration file (No such file or directory): '/home/wesley/devel/airflow-rbac/venv/lib/python3.7/site-packages/airflow/www_rbac/./airflow-home/webserver_config.py'
   (venv) 
   ```
   
   The traceback is shown because I removed the `silent=True` from the following line:
   
   https://github.com/apache/airflow/blob/8b0528993686564e99ce06f4e634dae1e0d25698/airflow/www_rbac/app.py#L64
   
   I could proceed by setting **`AIRFLOW_HOME`** as:
   
   ```
   export AIRFLOW_HOME=$(pwd)/airflow-home
   ```
   
   I don't find any mention in the docs that `AIRFLOW_HOME` needs to be an absolute path.
   
   Since RBAC UI is going to be the default in the next major release ([blog post mentioning that](https://airflow.apache.org/blog/airflow-1.10.10/#use-airflow-rbac-ui)) I think we could improve something here in order to make the migration smoother.


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> airflow webserver can not load webserver_config.py
> --------------------------------------------------
>
>                 Key: AIRFLOW-4347
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-4347
>             Project: Apache Airflow
>          Issue Type: Bug
>          Components: webserver
>    Affects Versions: 1.10.3
>            Reporter: sumous
>            Assignee: sumous
>            Priority: Minor
>
> I set AIRFLOW_HOME=./ 
> command *airflow initdb* is ok.
> And command *airflow webserver* got this:
> {code:shell}
> /Users/guoguo/Downloads/env_tmp/lib/python3.6/site-packages/flask_sqlalchemy/__init__.py:774: UserWarning: Neither SQLALCHEMY_DATABASE_URI nor SQLALCHEMY_BINDS is set. Defaulting SQLALCHEMY_DATABASE_URI to "sqlite:///:memory:".
>   'Neither SQLALCHEMY_DATABASE_URI nor SQLALCHEMY_BINDS is set. '
> {code}



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