How can different containers in docker-machines on different physical hosts talk?

[djian]

Hi There,

I checked most of the examples about Docker Swarm are building in the same physical machine running VirtualBox. So containers in different Docker-Machines can talk to each other no problem. My questions is if the containers are sitting in different Docker-Machines on different physical machines, it means that the Docker-Machines cannot talk to each other simply via the same VirtualBox bridge. So how we can make this work?

I think the whole purpose of Swarm is to let containers from different physical host can talk to each other.

Regards,

Dennis

[funkytaco]

Docker acquired SocketPlane.io to add “overlay networks”, which (I think) are available since Docker 1.9.

This guy shows an example of this, but maybe you should poke around the docs

Overlay networking in Docker

I am following the tutorial https://github.com/docker/dceu_tutorials/blob/master/6-networking.md to get a better understanding of Overlay Networking and Container Networking in general. It is great, really, but I have a questions which isn’t clear to me yet. When I make a container network like so: docker network create -d overlay --subnet=10.10.10.0/24 RED and start a container like so: DOCKERHOST1 $ docker run -itd --name container1 --net RED ubuntu DOCKEHOST2 $ docker run -itd --name …

[dvohra]

Use Flannel with etcd with Docker machine. Flannel sets up networking between Docker containers.

coreos/flannel