How to create populated MySQL Docker Image on build time

Question

I would like to create a MySQL Docker image with data already populated.

I want to create 3 layers like this:

        |---------------------|--------         


        

Answer 1

Building on MegaWubs's answer, I found this Dockerfile to be sufficient.

FROM mysql:5.6
RUN sed -i 's|/var/lib/mysql|/var/lib/mysql2|g' /etc/mysql/my.cnf