Run forever supports not exit progam

[vicanso]

What is the problem your feature solves, or the need it fulfills?

I use pingora as a lib for my reverse proxy , but run_forever function will call std::process::exit(0);. I expect close the http server only, but not exit the program,.

Describe the solution you'd like

Support parameter to set not exit the program for run_forever function.

[vicanso]

I want to use pingora as a reverse proxy module, I don't want to restart the program by way to load the new configuration. So I just need to close server1 and run server2, which as follows:

1. Server1 is running
2. Server2 trying to receive socks
3. Server1sending socks and close all runtimes
4. Server2 run all services

Is it feasible?

[eaufavor]

That should be possible. That is how internally we do the graceful restart. But the code is coupled with signal handling for now. Maybe someone can refactor that code to decouple them.

[futurist]

Also want run_forever return a anyhow::Result<()> instead of block_on(self.main_loop()), which will be panic when tokio::spawn, with below error:

Cannot start a runtime from within a runtime. This happens because a function (like `block_on`) attempted to block the current thread while the thread is being used to drive asynchronous tasks.