1 files changed, 55 insertions, 0 deletions
diff --git a/src/rpc/metrics.rs b/src/rpc/metrics.rs
new file mode 100644
index 00000000..c900518c
--- /dev/null
+++ b/src/rpc/metrics.rs
@@ -0,0 +1,55 @@
+use std::sync::Arc;
+
+use opentelemetry::{global, metrics::*};
+use tokio::sync::Semaphore;
+
+/// TableMetrics reference all counter used for metrics
+pub struct RpcMetrics {
+	pub(crate) _rpc_available_permits: ValueObserver<u64>,
+
+	pub(crate) rpc_counter: Counter<u64>,
+	pub(crate) rpc_timeout_counter: Counter<u64>,
+	pub(crate) rpc_netapp_error_counter: Counter<u64>,
+	pub(crate) rpc_garage_error_counter: Counter<u64>,
+
+	pub(crate) rpc_duration: ValueRecorder<f64>,
+	pub(crate) rpc_queueing_time: ValueRecorder<f64>,
+}
+impl RpcMetrics {
+	pub fn new(sem: Arc<Semaphore>) -> Self {
+		let meter = global::meter("garage_rpc");
+		RpcMetrics {
+			_rpc_available_permits: meter
+				.u64_value_observer("rpc.available_permits", move |observer| {
+					observer.observe(sem.available_permits() as u64, &[])
+				})
+				.with_description("Number of available RPC permits")
+				.init(),
+
+			rpc_counter: meter
+				.u64_counter("rpc.request_counter")
+				.with_description("Number of RPC requests emitted")
+				.init(),
+			rpc_timeout_counter: meter
+				.u64_counter("rpc.timeout_counter")
+				.with_description("Number of RPC timeouts")
+				.init(),
+			rpc_netapp_error_counter: meter
+				.u64_counter("rpc.netapp_error_counter")
+				.with_description("Number of communication errors (errors in the Netapp library)")
+				.init(),
+			rpc_garage_error_counter: meter
+				.u64_counter("rpc.garage_error_counter")
+				.with_description("Number of RPC errors (errors happening when handling the RPC)")
+				.init(),
+			rpc_duration: meter
+				.f64_value_recorder("rpc.duration")
+				.with_description("Duration of RPCs")
+				.init(),
+			rpc_queueing_time: meter
+				.f64_value_recorder("rpc.queueing_time")
+				.with_description("Time RPC requests were queued for before being sent")
+				.init(),
+		}
+	}
+}