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I'm struggling with Docker Compose (version 2 or 3). I'm trying to add multiple subnets, so various services can reach each other, but get assigned IPv4 addresses from different subnets.

This is my current configuration:

networks: custom: driver: "bridge" ipam: driver: default config: - subnet: 10.10.10.0/16 gateway: 10.10.10.1 - subnet: 100.100.100.0/16 gateway: 100.100.100.1

But I get the error:

Creating network "docker-setup-test_custom" with driver "bridge" ERROR: Pool overlaps with other one on this address space
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6
  • You can't have a subnet that overlaps another subnet. Commented May 3, 2019 at 11:59
  • But they don't overlap? Commented May 3, 2019 at 12:23
  • 2
    It can't overlap any other Docker network, including ones previously created. Commented May 3, 2019 at 12:49
  • 3
    Ah, found some old networks in docker network list. Thank you. Commented May 3, 2019 at 12:53
  • Now I'm getting a new error: ERROR: bridge driver doesn't support multiple subnets. Commented May 3, 2019 at 12:53

1 Answer 1

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You can specify the network config as specified in the documentation:

https://docs.docker.com/compose/networking/#specify-custom-networks

Otherwhise I believe all containers in the same docker compose can communicate without network config.

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