Docker Compose - adding identifier to network name

Question

I trying to create network in docker-compose.vs.debug.yml file:

networks:   myNetwork:     driver: bridge 

But docker adding some identifier:

docker network ls ->

NETWORK ID          NAME                                         DRIVER              SCOPE  0e1fec1a9a30        dockercompose1163770330_myNetwork            bridge              local 

If there any option to name it like this:

NETWORK ID          NAME                                         DRIVER              SCOPE 0e1fec1a9a30        myNetwork                                    bridge              local 

I need it to connect automatically two containers on separate projects.

Answer 1

Per https://docs.docker.com/compose/networking/:

Networks can also be given a custom name (since version 3.5):

version: "3.5" networks:   frontend:     name: custom_frontend     driver: custom-driver-1 

So you could choose to simply name your network myNetwork like this:

networks:   myNetwork:     name: myNetwork     driver: bridge 

Alternatively, if you want your container to join an existing network (I know you say you want docker-compose to create the network for you, but for people reading this question this might be helpful), https://docs.docker.com/compose/networking/ states:

If you want your containers to join a pre-existing network, use the external option:

networks:   default:     external:       name: my-pre-existing-network 

Answer 2

If you have docker-compose create the network, it will determine the name itself. Normally, it looks at the name of the directory where docker-compose.yml is located, and uses that as a prefix. Based on the name you have shown, it appears that this docker-compose.yml file is in a directory named dockercompose1163770330. It combines this with the myNetwork name you specified, and creates a network named dockercompose1163770330_myNetwork.

If you want to control the exact name of the network, you have two options.

1. Use a network created outside of docker-compose (an "external" network).

networks:   default:     external:       name: myNetwork 

This implies something else has created the network already. If you don't have such a network already, creating it is easy.

docker network create myNetwork 

2. (If possible) determine how visual-studio names it paths, and change that path to something static. Whether this is possible, or how, I have no idea. But if you can control dockercompose1163770330 and make it something different that you prefer, then you can predict the network name created from it.