Official Docker MariaDB Image of Synapsis
FROM syis/mariadb:latest
# An initialization script creates the needed
# databases by reading the environments named:
# - MARIADB_x_NAME
# - MARIADB_x_USER
# - MARIADB_x_PASSWORD
# (where x is an incremental integer)
# The script cycle over the numbers (by starting from 1),
# until it NOT find a variable named MARIADB_i_NAME
ENV MARIADB_ROOT_PASSWORD='secret'
ENV MARIADB_1_NAME='db_name'
ENV MARIADB_1_USER='db_user'
ENV MARIADB_1_PASSWORD='db_password'
ENV MARIADB_2_NAME='db_2_name'
ENV MARIADB_2_USER='db_2_user'
ENV MARIADB_2_PASSWORD='db_2_password'