Add buffer support

tonic-interop/Cargo.toml

@@ -25,6 +25,8 @@ hyper = { git = "https://github.com/hyperium/hyper" }
 console = "0.7"
 structopt = "0.2"
 pretty_env_logger = "0.3"
+tracing-fmt = "0.0.1-alpha.1"
+tracing = "0.1"
 
 [build-dependencies]
 tonic-build = { path = "../tonic-build" }

tonic-interop/src/bin/client.rs

@@ -14,7 +14,8 @@ struct Opts {
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
-    pretty_env_logger::init();
+    let sub = tracing_fmt::FmtSubscriber::builder().finish();
+    tracing::subscriber::set_global_default(sub).unwrap();
 
     let matches = Opts::from_args();