Dynamic Docker network IP range

[Abbas-b-b]

Summary

The default ipv4 subnet (172.22.1.0/24) may already be used with other Docker networks.
It'll be more convenient to find an available address to prevent the following error.
ERROR: Pool overlaps with other one on this address space

Motivation

This will eliminate Pool overlaps error on docker compose up

Additional context

No response

[cl445]

One possible solution is to define the network range that Docker uses to dynamically create networks. This range should be outside the one used by Mailcow to avoid conflicts. This can be achieved by adding the following lines to Docker’s daemon.json:

{
...
    "default-address-pools": [
        {
            "base": "172.23.0.0/16",
            "size": 24
        }
    ]
...
}