$ go get github.com/Scalingo/go-graceful-restart-example
$ go-graceful-restart-example
2014/12/14 20:26:42 [Server - 4301] Listen on [::]:12345
[...]
$ cd $GOPATH/src/github.com/Scalingo/go-graceful-restart-example/client
$ go run pong.go
# The server pid is included in its log, in the example: 4301
$ kill -HUP <server pid>
Let 10 seconds for the current requests to finish.
$ kill -TERM <server pid>