boot2docker - Connect to a Service running inside a docker container from outside

Question

I have a service running in a docker container (local machine). I can see the service URL in the Ambari service config.

Now I want to connect to that service using my local development environment.

I found I can connect to that within the container but when I use that URL outside in my local I get connection refused.

Cause: org.apache.http.conn.HttpHostConnectException: Connect to
xx.xx.xx.com:12008 [xx.xx.xx.com/195.169.98.101] failed: Connection refused

How to connect to a service running inside a container from outside?
In my case code execute in my local machine.

Answer 1

If your container has mapped its port on the VM 12008 port, you would need to make sure you have port forwarded 12008 in your VirtualBox connection settings, as I mention in "How to connect mysql workbench to running mysql inside docker?"

VBoxManage controlvm "boot2docker-vm" --natpf1 "tcp-port12008 ,tcp,,12008,,12008"
VBoxManage controlvm "boot2docker-vm" --natpf1 "udp-port12008 ,udp,,12008,,12008"