Overlay Networking for Multi-Host Container Networking

The Overlay Network driver in Docker provides the ability to network containers across multiple Docker hosts in a cluster.
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[AnselmoBattisti]

In my opinion, it's one of the best tutorial ever made! It's a very complex task resumed in a simple way! PERFECT!

[saivivek]

Thank you explained very well in short duration.

[stphnwallace]

Beautiful (lets get this up in non-prod asap) example...well done.

[praveenbkhandelwal]

Thank you for your excellent explanation.

[FuchsHorst]

Misses two important things: Security and performance. Is the overlay network encrypted by default? What's a real life performance one can get using overlay networks.

[vivekteega]

Thank you so much! Such a simple and clear explanation 👌🏽🙏🏽

[emanasa]

question- multi-container control in multiple hosts or single host, means single command all container everything. just like pod. how you can do here.

[nielshoogeveen]

Is the overlay network needed to let replicas communicate? I don't get that point. Is it used to let two different containers talk to each other (let's say a Flask API on one container on node 1 and a MongoDB database on a container on node2?) or just to let the replicas in a swarm talk to each other?

[jabteles]

How can a service in swarm access the host network? I need the service container to access an external database hosted in a VM in the same network as the host.

[TheHermitHacker]

Exactly what I was recently looking to do! Thanks guys!

[abdoulayemaiga]

Thanks you, But If both hosts are in the same network how you do that??

[fanco]

Hi. If I init swarm, and the second node cannot join to manager node, how can I make them connect? The two docker host can ping each eth0.

[TL-cdvq]

I have done the exact architecture with tis tutorial. I am verifying that hosts can ping each other, containers can ping each other and containers can ping the each hosts. But Hosts can not ping containers. What is the reason for that? I need to make an another configuration for that purpose?

[BrendonOHalloran]

So I have a question, could this applied a swarm in general? For example, I wanted to host an nginx server on the host, run home automation software on the second node and have the requests to the nginx server for the home automation software route from node 1 to 2 via an overlay network. Wold this work or is there a simpler way to do it?

[default_youtube_profile]

Can we access a host interface from with container on an overlay network?

[sivaramakrishna]

I followed the video but ping is not working. I tried both sides.

[taoli]

多主机之间的容器互通。其实，container 之间应该也走三层。就不需要overlay fabric 了。

[gasdia]

how easy when it works, how insane to debug when it doesn't

[rodrigocalderone]

I have followed your instructions, but I am not able to ping node1 to node2, or node2 to node1. I am using EC2 instances, and I have created an INBOUND traffic allowing ICMP traffic. I don't know what else I need to check for to get this working?