3 files changed, 41 insertions, 0 deletions
diff --git a/src/api/admin/api_server.rs b/src/api/admin/api_server.rs
index 2896d058..2d325fb1 100644
--- a/src/api/admin/api_server.rs
+++ b/src/api/admin/api_server.rs
@@ -15,6 +15,7 @@ use opentelemetry_prometheus::PrometheusExporter;
 use prometheus::{Encoder, TextEncoder};
 
 use garage_model::garage::Garage;
+use garage_rpc::system::ClusterHealthStatus;
 use garage_util::error::Error as GarageError;
 
 use crate::generic_server::*;
@@ -76,6 +77,31 @@ impl AdminApiServer {
 			.body(Body::empty())?)
 	}
 
+	fn handle_health(&self) -> Result<Response<Body>, Error> {
+		let health = self.garage.system.health();
+
+		let (status, status_str) = match health.status {
+			ClusterHealthStatus::Healthy => (StatusCode::OK, "Garage is fully operational"),
+			ClusterHealthStatus::Degraded => (
+				StatusCode::OK,
+				"Garage is operational but some storage nodes are unavailable",
+			),
+			ClusterHealthStatus::Unavailable => (
+				StatusCode::SERVICE_UNAVAILABLE,
+				"Quorum is not available for some/all partitions, reads and writes will fail",
+			),
+		};
+		let status_str = format!(
+			"{}\nConsult the full health check API endpoint at /v0/health for more details\n",
+			status_str
+		);
+
+		Ok(Response::builder()
+			.status(status)
+			.header(http::header::CONTENT_TYPE, "text/plain")
+			.body(Body::from(status_str))?)
+	}
+
 	fn handle_metrics(&self) -> Result<Response<Body>, Error> {
 		#[cfg(feature = "metrics")]
 		{
@@ -124,6 +150,7 @@ impl ApiHandler for AdminApiServer {
 	) -> Result<Response<Body>, Error> {
 		let expected_auth_header =
 			match endpoint.authorization_type() {
+				Authorization::None => None,
 				Authorization::MetricsToken => self.metrics_token.as_ref(),
 				Authorization::AdminToken => match &self.admin_token {
 					None => return Err(Error::forbidden(
@@ -147,8 +174,10 @@ impl ApiHandler for AdminApiServer {
 
 		match endpoint {
 			Endpoint::Options => self.handle_options(&req),
+			Endpoint::Health => self.handle_health(),
 			Endpoint::Metrics => self.handle_metrics(),
 			Endpoint::GetClusterStatus => handle_get_cluster_status(&self.garage).await,
+			Endpoint::GetClusterHealth => handle_get_cluster_health(&self.garage).await,
 			Endpoint::ConnectClusterNodes => handle_connect_cluster_nodes(&self.garage, req).await,
 			// Layout
 			Endpoint::GetClusterLayout => handle_get_cluster_layout(&self.garage).await,
diff --git a/src/api/admin/cluster.rs b/src/api/admin/cluster.rs
index 706db727..182a4f6f 100644
--- a/src/api/admin/cluster.rs
+++ b/src/api/admin/cluster.rs
@@ -43,6 +43,11 @@ pub async fn handle_get_cluster_status(garage: &Arc<Garage>) -> Result<Response<
 	Ok(json_ok_response(&res)?)
 }
 
+pub async fn handle_get_cluster_health(garage: &Arc<Garage>) -> Result<Response<Body>, Error> {
+	let health = garage.system.health();
+	Ok(json_ok_response(&health)?)
+}
+
 pub async fn handle_connect_cluster_nodes(
 	garage: &Arc<Garage>,
 	req: Request<Body>,
diff --git a/src/api/admin/router.rs b/src/api/admin/router.rs
index 3eee8b67..3fa07b3c 100644
--- a/src/api/admin/router.rs
+++ b/src/api/admin/router.rs
@@ -6,6 +6,7 @@ use crate::admin::error::*;
 use crate::router_macros::*;
 
 pub enum Authorization {
+	None,
 	MetricsToken,
 	AdminToken,
 }
@@ -16,8 +17,10 @@ router_match! {@func
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub enum Endpoint {
 	Options,
+	Health,
 	Metrics,
 	GetClusterStatus,
+	GetClusterHealth,
 	ConnectClusterNodes,
 	// Layout
 	GetClusterLayout,
@@ -88,8 +91,10 @@ impl Endpoint {
 
 		let res = router_match!(@gen_path_parser (req.method(), path, query) [
 			OPTIONS _ => Options,
+			GET "/health" => Health,
 			GET "/metrics" => Metrics,
 			GET "/v0/status" => GetClusterStatus,
+			GET "/v0/health" => GetClusterHealth,
 			POST "/v0/connect" => ConnectClusterNodes,
 			// Layout endpoints
 			GET "/v0/layout" => GetClusterLayout,
@@ -130,6 +135,7 @@ impl Endpoint {
 	/// Get the kind of authorization which is required to perform the operation.
 	pub fn authorization_type(&self) -> Authorization {
 		match self {
+			Self::Health => Authorization::None,
 			Self::Metrics => Authorization::MetricsToken,
 			_ => Authorization::AdminToken,
 		}
@@ -137,6 +143,7 @@ impl Endpoint {
 }
 
 generateQueryParameters! {
+	"format" => format,
 	"id" => id,
 	"search" => search,
 	"globalAlias" => global_alias,