Hello, I would like to have some help about Docker Swarm and Overlay networks.
I currently have two servers that connect to each other via their public IPs:
- A: Hosting databases (Postgres) and my program manager, launched via a Docker Compose and replicas of my program, via Docker Swarm
- B: Hosting only replicas of my program via Docker Swarm
To enable Server B to connect to Server A’s database, I thought of using an Overlay network, which I created before launching the Swarm & Compose containers.
When I start deploying replicas on Server A, they are indeed created on Server B as well, along with the overlay network.
On server A, the replicas manage to connect to the database via the container name, but the replicas can’t connect to it.
I looked via a docker network inspect "name of my network" on both servers, and I can see the name of the containers hosted by the server on which this command is run, but not that of the other machine.
Here’s a diagram of my problem:
Thanks for your help!