Hey everyone! I'm currently working with two different Docker Compose files: one for a language model service and another for a service that interacts with it using API calls. My goal is to get them to communicate, but right now they're running as separate instances. I've read that I can connect them using the networking feature in Docker, but I'm a bit unsure about the steps to achieve this.
From what I gather, I'll need to create a separate Docker network and then connect both containers to this shared network instead of keeping their individual networks. Can someone guide me through how to do this properly? What attributes do I need for the network, and do I set this up in the command shell? Also, what happens to the old networks they were using? Each Compose file has some other small images linked as well, so I'm a little confused. In brief, I want to enable communication between these two Docker Compose setups. How do I go about setting up this network?
2 Answers
You're on the right track! You'll indeed use the command line to create the Docker network. Just run `docker network create ` as mentioned. Then, to connect your containers to this network, you will need to update your Compose files with a top-level network block that references the network you created.
As for your question about networks, if both Compose files are on the same computer, a bridge network is usually sufficient. An overlay network is more for scenarios where you're running across multiple Docker hosts.
To create a Docker network, you'll want to use the command `docker network create `. After that, in each Docker Compose file, you can specify the network by adding a section like this:
```yaml
networks:
:
external: true
```
That way your containers can communicate over that shared network! Just make sure to replace `` with whatever you want to call the network.
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