With either environment variable or confd set for database connection minpool, the container ignores the parameter.

In docker-compose.yaml file,

Environment variable set as

or in confd yaml file,

The connection pool setting is always 50/50 regardless.

Verified that the other parameters are working in both scenarios.

Because there’s no way to override this setting, you are forced to overlay the opennms-datasources.xml file manually every time you make a change to that file.