[ mariadb v10.11.3 impossible to change innodb_log_file_buffering value to OFF ]

Hello
I have a container mariadb in version 10.11.3.
When I launch this container on a single server (but with docker swarm) the innodb_log_file_buffering value is set to OFF.
When I launch the same container on a clustering servers the innodb_log_file_buffering value is set to ON.
I dunno why.

I try to pass a mariadb.cnf file in the container via volume but same things. always set to ON.

Could you help me please ?

Micka