Merge pull request 'Report available disk space in `garage stats`' (#487) from report-disk-usage into main

Reviewed-on: https://git.deuxfleurs.fr/Deuxfleurs/garage/pulls/487

1 files changed, 44 insertions, 0 deletions

diff --git a/src/rpc/system_metrics.rs b/src/rpc/system_metrics.rs
index d96b67e4..83f5fa97 100644
--- a/src/rpc/system_metrics.rs
+++ b/src/rpc/system_metrics.rs
@@ -1,14 +1,31 @@
+use std::sync::atomic::{AtomicU64, Ordering};
+use std::sync::Arc;
+
 use opentelemetry::{global, metrics::*, KeyValue};
 
 /// TableMetrics reference all counter used for metrics
 pub struct SystemMetrics {
 	pub(crate) _garage_build_info: ValueObserver<u64>,
 	pub(crate) _replication_factor: ValueObserver<u64>,
+	pub(crate) _disk_avail: ValueObserver<u64>,
+	pub(crate) _disk_total: ValueObserver<u64>,
+	pub(crate) values: Arc<SystemMetricsValues>,
+}
+
+#[derive(Default)]
+pub struct SystemMetricsValues {
+	pub(crate) data_disk_total: AtomicU64,
+	pub(crate) data_disk_avail: AtomicU64,
+	pub(crate) meta_disk_total: AtomicU64,
+	pub(crate) meta_disk_avail: AtomicU64,
 }
 
 impl SystemMetrics {
 	pub fn new(replication_factor: usize) -> Self {
 		let meter = global::meter("garage_system");
+		let values = Arc::new(SystemMetricsValues::default());
+		let values1 = values.clone();
+		let values2 = values.clone();
 		Self {
 			_garage_build_info: meter
 				.u64_value_observer("garage_build_info", move |observer| {
@@ -28,6 +45,33 @@ impl SystemMetrics {
 				})
 				.with_description("Garage replication factor setting")
 				.init(),
+			_disk_avail: meter
+				.u64_value_observer("garage_local_disk_avail", move |observer| {
+					match values1.data_disk_avail.load(Ordering::Relaxed) {
+						0 => (),
+						x => observer.observe(x, &[KeyValue::new("volume", "data")]),
+					};
+					match values1.meta_disk_avail.load(Ordering::Relaxed) {
+						0 => (),
+						x => observer.observe(x, &[KeyValue::new("volume", "metadata")]),
+					};
+				})
+				.with_description("Garage available disk space on each node")
+				.init(),
+			_disk_total: meter
+				.u64_value_observer("garage_local_disk_total", move |observer| {
+					match values2.data_disk_total.load(Ordering::Relaxed) {
+						0 => (),
+						x => observer.observe(x, &[KeyValue::new("volume", "data")]),
+					};
+					match values2.meta_disk_total.load(Ordering::Relaxed) {
+						0 => (),
+						x => observer.observe(x, &[KeyValue::new("volume", "metadata")]),
+					};
+				})
+				.with_description("Garage total disk space on each node")
+				.init(),
+			values,
 		}
 	}
 }