Consider using smaller container networks to avoid exhausting the networks pool

[spantaleev]

Ref: https://straz.to/2021-09-08-docker-address-pools/

This is a nice post. It's a bit intrusive for the playbook to be changing the default address pool.

Although.. I guess that if the playbook is managing your Docker installation (which is optional and some may decide to turn it off), it may as well do some reconfiguration as it sees fit.

Then the question is.. how do we do this nicely? It seems like the ansible-role-docker role we're currently using has some docker_daemon_options variable, which influences /etc/docker/daemon.json.

So.. we may be able to set some options.

I suppose networks that had already been created will not be affected.. they'd need to be recreated to become small.

Or worse yet.. the new Docker pool definition (with the tiny networks) may be in conflict with the existing large ones.. and we'd need to force-delete them first and recreate them.

There are many things to figure out, but.. it seems like it's a possibility we should research.