I've been working on something similar in a load balancer I've been writing in Rust. It's still a work in progress. Basically the parent executes the new binar

I've been working on something similar in a load balancer I've been writing in Rust. It's still a work in progress. Basically the parent executes the new binary after it receives a USR1 signal. Once the child is healthy it kills the parent via SIGTERM. The listener socket file descriptor is passed over an environment variable. https://github.com/monroeclinton/- https://github.com/monroeclinton/- (this is the proper url, it's called dash)