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[proxy] Handle some unix signals.

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On the surface, this doesn't add much, but there are some benefits:

* We can do graceful shutdowns and thus record more code coverage data.

* We now have a foundation for the more interesting behaviors, e.g. "stop
  accepting new connections after SIGTERM but keep serving the existing ones".

* We give the otel machinery a chance to flush trace events before
  finally shutting down.
This commit is contained in:
Dmitry Ivanov
2023-02-17 13:16:30 +03:00
parent 6f9af0aa8c
commit 956b6f17ca
9 changed files with 79 additions and 65 deletions
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workspace_hack/Cargo.toml
+1 -1
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@@ -45,7 +45,7 @@ scopeguard = { version = "1" }
serde = { version = "1", features = ["alloc", "derive"] }
serde_json = { version = "1", features = ["raw_value"] }
socket2 = { version = "0.4", default-features = false, features = ["all"] }
tokio = { version = "1", features = ["fs", "io-std", "io-util", "macros", "net", "process", "rt-multi-thread", "sync", "time"] }
tokio = { version = "1", features = ["fs", "io-std", "io-util", "macros", "net", "process", "rt-multi-thread", "signal", "sync", "time"] }
tokio-util = { version = "0.7", features = ["codec", "io"] }
tonic = { version = "0.8", features = ["tls-roots"] }
tower = { version = "0.4", features = ["balance", "buffer", "limit", "retry", "timeout", "util"] }