Get a list of docker networks by their subnet (needed when diagnosing / fixing a similar problem to this).

for id in $(docker network ls --format "{{ .ID }}"); do
    docker network inspect $id --format '{{ json . }}' \
    | jq -c '[.Name,.Driver,.IPAM.Config.[].Subnet]'
done

This should give you a list of the network name, driver, and subnet, like so:

["bridge","bridge","172.17.0.0/16"]
["hanami-cli_default","bridge","172.24.0.0/16"]
...

You might also encounter several jq: error lines. These occur when the network you’re iterating over doesn’t have any IPAM entries, usually because they’re either the host network or a null network. When I run the command above, I get two such lines.

If you get more, simply remove ,.IPAM.Config.[].Subnet from the jq call and you can see which networks are returning an error, like so:

["bridge","bridge"]
["hanami-cli_default","bridge"]
["host","host"]
["none","null"]