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Long story short: Once we create a server and start it, we can't start it again. We can't close it and restart it, and we can't just start it without closing it. Unfortunately, if the server's config needs to change, we have a Problem here. This ultimately means that the retry logic for GetListeners can't actually retry successfully; if we fail on the first attempt, we necessarily fail on any later attempts also, and if we try to fix that, we get panics. But! We don't actually NEED to retry. We just need to ensure that we can open a :0 port, extract the actual port number, and use that in places where the port number mattered, without having to rebind it. The only actual place we needed to rebind things was opening gRPC servers, so we introduce a gRPC Listener that can be used instead of trying to bind to a specified port. In a bunch of other cases where we had similar logic to try to allocate and then use a port, we can switch to just using a provided listener. For instance, net/http has `Serve(net.Listener, handler)`, not just ListenAndServe(addr, handler). This should eliminate the weird CI failures from eaddrinuse. NOT fixed: server/cluster_test.go/TestClusterResize_AddNode isn't working right now. The new node isn't actually being added to the existing cluster. I attempted this but was outsmarted by it, and I think fixing the rest of this is worth it as a separate thing. |
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| handler.go | ||
| memnet.go | ||
| server.go | ||
| tls.go | ||