This mysql config is made to run within the official mysql container.

my-custom.cnf

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#
# 	_dockerfile/mysql/conf.d/my.cnf
#	Last update: 2017-01-05_10h05
#
# 	This mysql config is made to run within the official mysql container.
# 	https://hub.docker.com/_/mysql/
#
# Inspired by:
#	https://www.percona.com/blog/2016/10/12/mysql-5-7-performance-tuning-immediately-after-installation/
#	https://github.com/kamipo/etcfiles/blob/master/etc/my.cnf
#	https://gist.github.com/pascalandy/9be333d68101dcfc84854279b5629a9d
#
# Code versionning:
#	https://gist.github.com/pascalandy/3ffb1b443fd143382a7cd2d4dae9a144
#
# nano /root/deploy-setup/_dockerfile/mysql/conf.d/my.cnf
# --mount type=bind,src=/root/deploy-setup/_dockerfile/mysql/conf.d,dst=/etc/mysql/conf.d \
#
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[mysqld]
# other variables here
innodb_buffer_pool_size = 512M # (adjust value here, 50%-70% of total RAM)
innodb_log_file_size = 256M
innodb_flush_log_at_trx_commit = 1 # may change to 2 or 0
innodb_flush_method = O_DIRECT

innodb_autoinc_lock_mode=2

innodb_io_capacity_max=4000
innodb_io_capacity=2000

Here is another config that may help - https://gist.github.com/pascalandy/e829c7db01a329d83bbe64b72cd642f2

As I am not a DBA or a mysql expert, please let me know if we can improve something on this config.
The container will run within a public cloud like DigitalOcean or Vultr with SSD drives.

Cheers!
twitter.com/_pascalandy