Re:Application Container Security Guide [pdf]
by paulddraper on Monday November 20, 2017 @10:26PM
(#15745280)
It is the purpose of AppArmor. But in normal land, we just expect documented MySQL options to work.
It really was insane for MySQL package maintainers to make AppArmor the default experience. It ought to have been a separate package, where people that wanted AppArmor could have AppArmor.
I'd be happy to know it was working as indented, and a short google would lead you to the answer. In fact, Digital Ocean's documentation is the first result and it's right there in the steps.