sudo lsof -Pni :3306
	COMMAND  PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
mysqld  1646 mysql   19u  IPv4  20618      0t0  TCP 127.0.0.1:3306 (LISTEN)


/etc/mysql/mariadb.conf.d/99-openstack.conf
[mysqld]
bind-address = 10.0.0.11

default-storage-engine = innodb
innodb_file_per_table
max_connections = 4096
collation-server = utf8_general_ci
character-set-server = utf8

/etc/mysql/mariadb.conf.d/50-server.cnf
[server]

# this is only for the mysqld standalone daemon
[mysqld]

#
# * Basic Settings
#
user            = mysql
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
port            = 3306
basedir         = /usr
datadir         = /var/lib/mysql
tmpdir          = /tmp
lc-messages-dir = /usr/share/mysql
skip-external-locking

# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address            = 10.0.0.11

#
# * Fine Tuning
#
key_buffer_size         = 16M
max_allowed_packet      = 16M
thread_stack            = 192K
....

mysql -u keystone -p works

mysql -u keystone -p -h 10.0.0.11 does not work