fix(main): update dns_init startup logic and remove unused code in http.rs (#531)

- Refactored the DNS resolver initialization logic in `main.rs` for improved startup reliability and error handling.
- Removed unused code from `http.rs` to keep the codebase clean and maintainable.

rustfs/src/main.rs

@@ -136,6 +136,9 @@ async fn run(opt: config::Opt) -> Result<()> {
 
     set_global_addr(&opt.address).await;
 
+    // Wait for DNS initialization to complete before network-heavy operations
+    dns_init.await.map_err(Error::other)?;
+
     // For RPC
     let (endpoint_pools, setup_type) = EndpointServerPools::from_volumes(server_address.clone().as_str(), opt.volumes.clone())
         .await
@@ -230,9 +233,6 @@ async fn run(opt: config::Opt) -> Result<()> {
     // Initialize event notifier
     init_event_notifier().await;
 
-    // Wait for DNS initialization to complete before network-heavy operations
-    dns_init.await.map_err(Error::other)?;
-
     let buckets_list = store
         .list_bucket(&BucketOptions {
             no_metadata: true,

rustfs/src/server/http.rs

@@ -128,7 +128,6 @@ pub async fn start_http_server(
 ) -> Result<tokio::sync::broadcast::Sender<()>> {
     let server_addr = parse_and_resolve_address(opt.address.as_str()).map_err(Error::other)?;
     let server_port = server_addr.port();
-    let _server_address = server_addr.to_string();
 
     // The listening address and port are obtained from the parameters
     let listener = {