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-rw-r--r--pingora-load-balancing/src/health_check.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/pingora-load-balancing/src/health_check.rs b/pingora-load-balancing/src/health_check.rs
index b02776d..ac63579 100644
--- a/pingora-load-balancing/src/health_check.rs
+++ b/pingora-load-balancing/src/health_check.rs
@@ -24,6 +24,8 @@ use pingora_http::{RequestHeader, ResponseHeader};
use std::sync::Arc;
use std::time::Duration;
+/// [HealthObserve] is an interface for observing health changes of backends,
+/// this is what's used for our health observation callback.
#[async_trait]
pub trait HealthObserve {
/// Observes the health of a [Backend], can be used for monitoring purposes.