How to install HandlerSocket in Percona in Docker?

Question

MySQL

There is a docker container FROM percona:5.7
In addition to the elementary tuning of my.cnf, nothing else is done.
I would like to install the HandlerSocket plugin inside.
Trying to run

RUN service mysql start && mysql -u root -e "install plugin handlersocket soname 'handlersocket.so'"

But I'm getting

ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

Most likely it is necessary to act somehow differently, but something I can not think of anything.
Who has already encountered, tell me how to do it?

Answer 1

In my.conf . . .

[mysqld]

# ...

plugin_maturity=beta
plugin-load=handlersocket.so

#handlersocket_address=0.0.0.0
#handlersocket_port=9998
#handlersocket_port_wr=9999

# ...