Add env to disable control plane check for searcher.

quickwit/quickwit-serve/src/lib.rs

@@ -138,6 +138,8 @@ const READINESS_REPORTING_INTERVAL: Duration = if cfg!(any(test, feature = "test
 const METASTORE_CLIENT_MAX_CONCURRENCY_ENV_KEY: &str = "QW_METASTORE_CLIENT_MAX_CONCURRENCY";
 const DEFAULT_METASTORE_CLIENT_MAX_CONCURRENCY: usize = 6;
 const DISABLE_DELETE_TASK_SERVICE_ENV_KEY: &str = "QW_DISABLE_DELETE_TASK_SERVICE";
+const DISABLE_CONTROL_PLANE_CHECK_FOR_SEARCHER_ENV_KEY: &str =
+    "QW_DISABLE_CONTROL_PLANE_CHECK_FOR_SEARCHER";
 
 pub type EnvFilterReloadFn = Arc<dyn Fn(&str) -> anyhow::Result<()> + Send + Sync>;
 
@@ -338,7 +340,12 @@ async fn start_control_plane_if_needed(
             balance_channel_for_service(cluster, QuickwitService::ControlPlane).await;
 
         // If the node is a metastore, we skip this check in order to avoid a deadlock.
-        if !node_config.is_service_enabled(QuickwitService::Metastore) {
+        // If the node is a searcher and the control plane check is disabled for searcher, we skip
+        // this check.
+        if !(node_config.is_service_enabled(QuickwitService::Metastore)
+            || (node_config.is_service_enabled(QuickwitService::Searcher)
+                && get_bool_from_env(DISABLE_CONTROL_PLANE_CHECK_FOR_SEARCHER_ENV_KEY, false)))
+        {
             info!("connecting to control plane");
 
             if !balance_channel