- add: gRPC health check for gRPC services

database-service/src/main.rs

@@ -26,7 +26,6 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     let addr = env::var("LISTEN_ADDR").unwrap_or_else(|_| "0.0.0.0".to_string());
     let port = env::var("DATABASE_SERVICE_PORT").unwrap_or_else(|_| "50052".to_string());
-    let health_port = env::var("HEALTH_CHECK_PORT").unwrap_or_else(|_| "8080".to_string());
 
     let database_url = std::env::var("DATABASE_URL").expect("DATABASE_URL must be set");
     let redis_url =
@@ -37,12 +36,11 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let service_address =
         env::var("DATABASE_SERVICE_ADDR").unwrap_or_else(|_| "127.0.0.1".to_string());
     let service_port = port.clone();
-    let health_check_url = format!("http://{}:{}/health", service_address, health_port);
 
     // Register service with Consul
     let service_id = consul_registration::get_or_generate_service_id(env!("CARGO_PKG_NAME"));
     let version = env!("CARGO_PKG_VERSION").to_string();
-    let tags = vec![version];
+    let tags = vec![version, "grpc".to_string()];
     let meta = HashMap::new();
     consul_registration::register_service(
         &consul_url,
@@ -52,9 +50,10 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         service_port.parse().unwrap_or(50052),
         tags,
         meta,
-        &health_check_url,
+        None,
+        None,
     )
-    .await?;
+        .await?;
 
     consul_registration::start_health_check(addr.as_str()).await?;
 
@@ -70,10 +69,14 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let db = Arc::new(Database::new(pool, redis_cache));
     let my_service = MyDatabaseService { db };
 
+    let (mut health_reporter, health_service) = tonic_health::server::health_reporter();
+    health_reporter.set_serving::<UserServiceServer<MyDatabaseService>>().await;
+
     // Pass `shared_cache` into services as needed
     info!("Database Service running on {}", address);
     tokio::spawn(
         Server::builder()
+            .add_service(health_service)
             .add_service(UserServiceServer::new(my_service.clone()))
             .add_service(CharacterDbServiceServer::new(my_service))
             .serve(address),