praefect: Stop gRPC servers on exit

Next to a bunch of other things, the Praefect server's `run()` function
also has the task to create the gRPC servers. These servers are never
stopped though, which as a result means that we leak listeners set up
for this server in our tests.

Fix this by calling `Stop()` on these servers.

1 files changed, 2 insertions, 0 deletions

diff --git a/cmd/praefect/main.go b/cmd/praefect/main.go
index 743578b1b..44a0981f0 100644
--- a/cmd/praefect/main.go
+++ b/cmd/praefect/main.go
@@ -402,6 +402,8 @@ func run(cfgs []starter.Config, conf config.Config) error {
 		if err != nil {
 			return fmt.Errorf("create gRPC server: %w", err)
 		}
+		defer srv.Stop()
+
 		b.RegisterStarter(starter.New(cfg, srv))
 	}