Traffic simulator tool for Mariadb?
There are no 100% real workload replication tools for MySQL (at least 100% free)

All you could do is only simulate:


using HammerDB
a very interesting tool from Percona, Percona playback and related article
you can also look for Apache JMeter
you can sometimes enable the general log on MySQL server, and use it to prepare tests with JMeter (after manual preparation)


With Playback - You can not replay collisions as it was on real server
With JMeter (and similar). You would need to define queries by yourself.

Depending from what you want to demonstrate it could be easy or hard to prepare a proper simulation.

Sometimes for proper problem simulation all you need is mysqlslap. Run 3-4 instances with different queries and you can simulate locks, deadlocks etc.