Can't connect to DB -- host not allowed

[goosechaser]

Hi. There's a closed ticket that talk about a similar issue but the resolution does not help.

I've created a db instance but can't connect to it:

+ for script in '$(ls -d /var/lib/dokku/plugins/*/commands)'
+ /var/lib/dokku/plugins/git/commands mariadb:info foo
+ case "$1" in
+ for script in '$(ls -d /var/lib/dokku/plugins/*/commands)'
+ /var/lib/dokku/plugins/mariadb/commands mariadb:info foo

       Host: 172.17.42.1
       Port: 49156
       User: 'root'
       Password: 'tvgBftypUwCJPQPW'
       Database: 'db'

+ for script in '$(ls -d /var/lib/dokku/plugins/*/commands)'
+ /var/lib/dokku/plugins/mysql/commands mariadb:info foo
+ for script in '$(ls -d /var/lib/dokku/plugins/*/commands)'
+ /var/lib/dokku/plugins/nginx-vhosts/commands mariadb:info foo
+ case "$1" in
+ for script in '$(ls -d /var/lib/dokku/plugins/*/commands)'
+ /var/lib/dokku/plugins/mysql/commands mariadb:create foo
+ for script in '$(ls -d /var/lib/dokku/plugins/*/commands)'
+ /var/lib/dokku/plugins/nginx-vhosts/commands mariadb:create foo
+ case "$1" in
root@test:/home/dokku# mysql -u root -p -H 172.17.42.1 -P 49156
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
root@test:/home/dokku#

Running the same command from within the container:

root@1cf73d9743a5:/# mysql -u root -p -H 172.17.42.1 -P 49156
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
root@1cf73d9743a5:/# ps aux | grep mysql
root        18  0.0  0.2  18000  1268 ?        S    20:39   0:00 /bin/bash /usr/bin/mysqld_safe
mysql      646  0.1 19.3 888024 97056 ?        Sl   20:39   0:00 /usr/sbin/mysqld --basedir=/usr --datadir=/opt/mysql --plugin-dir=/usr/lib/mysql/plugin --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/run/mysqld/mysqld.sock --port=3306
root       647  0.0  0.1   4308   544 ?        S    20:39   0:00 logger -t mysqld -p daemon.error
root      1933  0.0  0.1   6516   620 ?        S+   20:52   0:00 grep mysql
root@1cf73d9743a5:/# telnet 172.17.42.1 49156
Trying 172.17.42.1...
Connected to 172.17.42.1.
Escape character is '^]'.
FHost '172.17.42.1' is not allowed to connect to this MariaDB server
Connection closed by foreign host.

So what gives? mysql is running, ip/port are accessible but no permission to connect.

Thanks.