Since I use containers in a weird way (for home networking), I need some weird glue to make network egress work for containers and other clients alike. Most container networking assumes you either want to limit access between containers or control access to the internet. I need those things a bit, but what I really need is the ability to direct default-route-bound traffic to the uplink of my choosing, whether that be Wireguard, OpenVPN, or just a plain old physical NIC.
I've been using cmd/init on a pure Docker system for a while and it works
pretty well in that scenario, but I'm going to try and make this work on a
Kubernetes system, which requires a bit more thought to do correctly.