1 files changed, 179 insertions, 0 deletions
diff --git a/src/api/admin/special.rs b/src/api/admin/special.rs
new file mode 100644
index 00000000..0ecf82bc
--- /dev/null
+++ b/src/api/admin/special.rs
@@ -0,0 +1,179 @@
+use std::sync::Arc;
+
+use http::header::{
+	ACCESS_CONTROL_ALLOW_HEADERS, ACCESS_CONTROL_ALLOW_METHODS, ACCESS_CONTROL_ALLOW_ORIGIN, ALLOW,
+};
+use hyper::{Response, StatusCode};
+
+#[cfg(feature = "metrics")]
+use prometheus::{Encoder, TextEncoder};
+
+use garage_model::garage::Garage;
+use garage_rpc::system::ClusterHealthStatus;
+
+use garage_api_common::helpers::*;
+
+use crate::api::{CheckDomainRequest, HealthRequest, MetricsRequest, OptionsRequest};
+use crate::api_server::ResBody;
+use crate::error::*;
+use crate::{Admin, RequestHandler};
+
+impl RequestHandler for OptionsRequest {
+	type Response = Response<ResBody>;
+
+	async fn handle(
+		self,
+		_garage: &Arc<Garage>,
+		_admin: &Admin,
+	) -> Result<Response<ResBody>, Error> {
+		Ok(Response::builder()
+			.status(StatusCode::OK)
+			.header(ALLOW, "OPTIONS,GET,POST")
+			.header(ACCESS_CONTROL_ALLOW_METHODS, "OPTIONS,GET,POST")
+			.header(ACCESS_CONTROL_ALLOW_HEADERS, "authorization,content-type")
+			.header(ACCESS_CONTROL_ALLOW_ORIGIN, "*")
+			.body(empty_body())?)
+	}
+}
+
+impl RequestHandler for MetricsRequest {
+	type Response = Response<ResBody>;
+
+	async fn handle(
+		self,
+		_garage: &Arc<Garage>,
+		admin: &Admin,
+	) -> Result<Response<ResBody>, Error> {
+		#[cfg(feature = "metrics")]
+		{
+			use opentelemetry::trace::Tracer;
+
+			let mut buffer = vec![];
+			let encoder = TextEncoder::new();
+
+			let tracer = opentelemetry::global::tracer("garage");
+			let metric_families = tracer.in_span("admin/gather_metrics", |_| {
+				admin.exporter.registry().gather()
+			});
+
+			encoder
+				.encode(&metric_families, &mut buffer)
+				.ok_or_internal_error("Could not serialize metrics")?;
+
+			Ok(Response::builder()
+				.status(StatusCode::OK)
+				.header(http::header::CONTENT_TYPE, encoder.format_type())
+				.body(bytes_body(buffer.into()))?)
+		}
+		#[cfg(not(feature = "metrics"))]
+		Err(Error::bad_request(
+			"Garage was built without the metrics feature".to_string(),
+		))
+	}
+}
+
+impl RequestHandler for HealthRequest {
+	type Response = Response<ResBody>;
+
+	async fn handle(
+		self,
+		garage: &Arc<Garage>,
+		_admin: &Admin,
+	) -> Result<Response<ResBody>, Error> {
+		let health = 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 /v2/GetClusterHealth for more details\n",
+			status_str
+		);
+
+		Ok(Response::builder()
+			.status(status)
+			.header(http::header::CONTENT_TYPE, "text/plain")
+			.body(string_body(status_str))?)
+	}
+}
+
+impl RequestHandler for CheckDomainRequest {
+	type Response = Response<ResBody>;
+
+	async fn handle(
+		self,
+		garage: &Arc<Garage>,
+		_admin: &Admin,
+	) -> Result<Response<ResBody>, Error> {
+		if check_domain(garage, &self.domain).await? {
+			Ok(Response::builder()
+				.status(StatusCode::OK)
+				.body(string_body(format!(
+					"Domain '{}' is managed by Garage",
+					self.domain
+				)))?)
+		} else {
+			Err(Error::bad_request(format!(
+				"Domain '{}' is not managed by Garage",
+				self.domain
+			)))
+		}
+	}
+}
+
+async fn check_domain(garage: &Arc<Garage>, domain: &str) -> Result<bool, Error> {
+	// Resolve bucket from domain name, inferring if the website must be activated for the
+	// domain to be valid.
+	let (bucket_name, must_check_website) = if let Some(bname) = garage
+		.config
+		.s3_api
+		.root_domain
+		.as_ref()
+		.and_then(|rd| host_to_bucket(domain, rd))
+	{
+		(bname.to_string(), false)
+	} else if let Some(bname) = garage
+		.config
+		.s3_web
+		.as_ref()
+		.and_then(|sw| host_to_bucket(domain, sw.root_domain.as_str()))
+	{
+		(bname.to_string(), true)
+	} else {
+		(domain.to_string(), true)
+	};
+
+	let bucket_id = match garage
+		.bucket_helper()
+		.resolve_global_bucket_name(&bucket_name)
+		.await?
+	{
+		Some(bucket_id) => bucket_id,
+		None => return Ok(false),
+	};
+
+	if !must_check_website {
+		return Ok(true);
+	}
+
+	let bucket = garage
+		.bucket_helper()
+		.get_existing_bucket(bucket_id)
+		.await?;
+
+	let bucket_state = bucket.state.as_option().unwrap();
+	let bucket_website_config = bucket_state.website_config.get();
+
+	match bucket_website_config {
+		Some(_v) => Ok(true),
+		None => Ok(false),
+	}
+}