Download init.db

# Buat file gabungan
wget -O initdb.sql https://raw.githubusercontent.com/apache/guacamole-client/1.6.0/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/schema/001-create-schema.sql
wget -O - https://raw.githubusercontent.com/apache/guacamole-client/1.6.0/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/schema/002-create-admin-user.sql >> initdb.sql

Kemudian lanjutkan

sudo docker cp initdb.sql big-bear-guacamole-mysql-1:/initdb.sql
sudo docker exec -it big-bear-guacamole-mysql-1 bash

Lalu dalam MySQL container

mysql -u root -p
CREATE DATABASE IF NOT EXISTS guacamole_db;
USE guacamole_db;
SOURCE /initdb.sql;
EXIT;

Kalau tidak ada error, lanjutkan 

sudo docker restart big-bear-guacamole-app-1 big-bear-guacamole-mysql-1 big-bear-guacamole-guacd-1

Lalu buka browser http://<ip-server>:8090/guacamole

Login pakai

Username: guacadmin
Password: guacadmin