This isn't a full-fledged project. I'm just trying to get inter-container communication working in a Docker-in-Docker swarm running on Vagrant.

The goal is to get the db_slave service to be able to access the db_master on port 3306. (This works in Docker for Mac, but I can't get it working in Vagrant.)

I'm creating a repo so I might get some help with my problem.

https://forums.docker.com/t/docker-swarm-docker-in-docker-container-communication/34425/2

Prerequisites

• Vagrant
• VirtualBox (Vagrant can install VirtualBox if it's not already on your system.)

Working with Vagrant

From the clone directory, issue:

vagrant up

To SSH into the machine:

vagrant ssh

Working with the Cluster/Stack

For the following commands, be sure that you're in an SSH session in the Vagrant VM (see above), then change to the shared vagrant directory:

cd /vagrant/swarm

start up local swarm cluster

# change the interface to try another; omit the option to use the default.
swarmbin/start_swarm.sh --advertise-addr=eth0 

visualize swarm

• http://192.168.56.111:8081/

deploy stack

swarmbin/deploy.sh

test - watch slave's logs

This shows whether communication is failing, or not.

docker service logs --follow db_slave

undeploy stack

swarmbin/undeploy.sh

kill swarm

swarmbin/kill_swarm.sh