util: log kernel version on start

It is useful to have the kernel version logged while starting binaries.
Some functionality depends on the version of the kernel, debugging
issues related to this will be easier.

Signed-off-by: Niels de Vos <ndevos@redhat.com>

cmd/cephcsi.go

@@ -111,6 +111,9 @@ func main() {
 		fmt.Println("Go Version:", runtime.Version())
 		fmt.Println("Compiler:", runtime.Compiler)
 		fmt.Printf("Platform: %s/%s\n", runtime.GOOS, runtime.GOARCH)
+		if kv, err := util.KernelVersion(); err == nil {
+			fmt.Println("Kernel:", kv)
+		}
 		os.Exit(0)
 	}