Noël BARDELOT created AIRFLOW-6260:
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Summary: Drive _cmd config options by env var
Key: AIRFLOW-6260
URL: https://issues.apache.org/jira/browse/AIRFLOW-6260
Project: Apache Airflow
Issue Type: Improvement
Components: configuration
Affects Versions: 1.10.6
Reporter: Noël BARDELOT
Assignee: Noël BARDELOT
Add the ability to provide `_CMD` environment variables the same way you can
use `_cmd` options in the configuration. Those `_CMD` environment variable
would have priority against the `_cmd` options the same way the usual
environment variables have priority against the configuration options.
The goal is to allow Kubernetes users to provide such commands via configmap,
and reference them in the configuration using environment variables. The
referenced script would itself consume secrets in order to construct the
connection.
For exemple a script provided as a configmap and referenced by
`AIRFLOW__CORE__SQL_ALCHEMY_CONN_CMD` would compute the Alchemy connection
using the database user and password provided as secrets:
#!/bin/bash
echo -n "postgresql+psycopg2://`cat
/var/run/secrets/postgresql/postgresql-user`:`cat
/var/run/secrets/postgresql/postgresql-password`@$POSTGRESQL_SERVICE_HOST:$POSTGRESQL_SERVICE_PORT/airflow"
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