Connect from docker container to host service (mysqld)

gistfile1.txt

# docker-compose.yml - creates a new network bridge
# listed in `docker network ls`. 
# Note the name, i.e: `br-f60327d77bc2`
services:
  tomcat:
    image: tomcat:7.0
    networks:
      - dockernet

networks:
  dockernet:
    driver: bridge
    ipam:
      config:
        - subnet: 192.168.0.0/24
          gateway: 192.168.0.1

# Add iptables firewall rule to allow connection to MySQL running on host system:
# Note: MySQL must listen on all interfaces: 0.0.0.0:3306!
# Use other iptables rule to limit external traffic to MySQL

-A INPUT -p tcp -m state --state NEW -m tcp -i br-f60327d77bc2 --dport 3306 -j ACCEPT