Docker networks do not have consistent name

Question

Depending on the host where I'm running Docker-compose, I get different network naming. For instance:

This is my docker-compose file:

./my-project-folder/docker-compose.yml

version: '3'

services:

  search:
    build: docker/server
    container_name: server
    ports:
      - 9200:9200

I have a project called my-project-folder and the network is called:

my-project-folder_default

But sometimes I get this network name:

myprojectfolder_default

Is there a way to have consistent network names?

Can you share your docker compose?

juanlumn
– juanlumn

2018-07-17 14:23:58 +00:00
Commented Jul 17, 2018 at 14:23 — juanlumn
– juanlumn, Commented Jul 17, 2018 at 14:23
Added docker compose file @juanlumn

Antirreni91
– Antirreni91

2018-07-18 08:50:19 +00:00
Commented Jul 18, 2018 at 8:50 — Antirreni91
– Antirreni91, Commented Jul 18, 2018 at 8:50

David Maze · Accepted Answer · 2018-07-18 10:42:51Z

1

docker-compose -p or the COMPOSE_PROJECT_NAME environment variable will manually set that prefix, rather than letting Compose decide for itself based on the directory name. This would still let you have multiple copies of the stack running on the same system if you needed to (forcing container_name and the network name would cause multiple deployments to conflict).

answered Jul 18, 2018 at 10:42

David Maze

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juanlumn · Accepted Answer · 2018-07-18 09:40:38Z

Have you tried defining an entry under networks?

version: '3'

services:

  search:
    build: docker/server
    container_name: server
    ports:
      - 9200:9200
    networks:
      - your-network-name

networks:
  your-network-name: ...

There is some interesting information in the Compose File Reference V3 Documentation

According to the previous doc:

version: '3.5'

services:
  search:
    build: docker/server
    container_name: server
    ports:
      - 9200:9200
    networks:
      - your-network-name

networks:
  your-network-name:
   name: your-global-net

Please note that you will need at least Docker Engine 17.06.0 for this to work and you need to use the latest version of docker-compose yml.

To check that you can simply type:

docker version

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