dkalamar opened a new issue, #34015:
URL: https://github.com/apache/airflow/issues/34015
### Apache Airflow version
2.7.0
### What happened
Certain configuration variables fail to evaluate from when `_CMD` pattern is
applied when specified in `Airflow.cfg`. These include:
```
[celery]
broker_url
result_backend
flower_basic_auth
[core]
fernet_key
```
Instead the `_CMD` is listed as its own configuration variable and the
evaluated variable takes its value from `default`.
### What you think should happen instead
Except from Airflow Configuration values:
Section | Key | Value | Source
-- | -- | -- | --
core | fernet_key | < hidden > | default
core | fernet_key_cmd | /usr/bin/env bash -c "echo -n ${FERNET_KEY}" |
airflow.cfg
database | sql_alchemy_conn | < hidden > | cmd
We would expect `fernet_key_cmd` to be evaluated the same way as
`sql_alchemy_conn_cmd`. Instead, `fernet_key` takes its default value.
### How to reproduce
Airflow.cfg excerpt:
```
[core]
fernet_key_cmd = /usr/bin/env bash -c "echo -n ${FERNET_KEY}"
[database]
sql_alchemy_conn_cmd = /usr/bin/env bash -c "echo -n
postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${POSTGRES_HOST}:${POSTGRES_PORT}/${POSTGRES_DB}"
```
### Operating System
ubuntu22.04
### Versions of Apache Airflow Providers
Package Name | Version | Description
-- | -- | --
apache-airflow-providers-amazon | 8.5.1 | Amazon integration (includingÂ
Amazon Web Services (AWS)).<br>
apache-airflow-providers-celery | 3.3.2 | Celery<br>
apache-airflow-providers-common-sql | 1.7.0 | Common SQL Provider<br>
apache-airflow-providers-ftp | 3.5.0 | File Transfer Protocol (FTP)<br>
apache-airflow-providers-http | 4.5.0 | Hypertext Transfer Protocol
(HTTP)<br>
apache-airflow-providers-imap | 3.3.0 | Internet Message Access Protocol
(IMAP)<br>
apache-airflow-providers-pagerduty | 3.3.0 | Pagerduty<br>
apache-airflow-providers-postgres | 5.6.0 | PostgreSQL<br>
apache-airflow-providers-redis | 3.3.1 | Redis<br>
apache-airflow-providers-slack | 7.3.2 | Slack<br>
apache-airflow-providers-snowflake | 4.4.2 | Snowflake<br>
apache-airflow-providers-sqlite | 3.4.3 | SQLite<br>
apache-airflow-providers-ssh | 3.7.1 | Secure Shell (SSH)<br>
### Deployment
Docker-Compose
### Deployment details
_No response_
### Anything else
_No response_
### Are you willing to submit PR?
- [ ] Yes I am willing to submit a PR!
### Code of Conduct
- [X] I agree to follow this project's [Code of
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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