mysql-db      | 2019-08-01T09:37:02.135128786Z MySQL init process in progress...
mysql-db      | 2019-08-01T09:37:03.149603593Z MySQL init process in progress...
mysql-db      | 2019-08-01T09:37:21.345066347Z MySQL init process in progress...
mysql-db      | 2019-08-01T09:37:22.347455022Z MySQL init process failed.
Solution / fix
Do not define MYSQL_PWD environment variable in your docker configuration during the init process.
Entrypoint
Maybe a fix/trick could be done in the entrypoint to break the MYSQL_PWD variable value before init process and redefine it just before starting mysqld.
Thx. Bye
This method of specifying your MySQL password must be considered extremely insecure and should not be used. Some versions of ps include an option to display the environment of running processes. On some systems, if you set MYSQL_PWD, your password is exposed to any other user who runs ps. Even on systems without such a version of ps, it is unwise to assume that there are no other methods by which users can examine process environments.
- https://dev.mysql.com/doc/refman/8.0/en/password-security-user.html
We are not going to adjust the entrypoint script to block a bad env var since that would open the gates for possibly doing the same for all env vars used by mysql and mysqld.