ClusterCache: Increase timeout for informer List+Watch calls from 10s…

… to 11m

controllers/clustercache/cluster_accessor_client.go

@@ -213,15 +213,29 @@ func createUncachedClient(scheme *runtime.Scheme, config *rest.Config, httpClien
 
 // createCachedClient creates a cached client for the given cluster, based on the rest.Config.
 func createCachedClient(ctx context.Context, clusterAccessorConfig *clusterAccessorConfig, config *rest.Config, httpClient *http.Client, mapper meta.RESTMapper) (client.Client, *stoppableCache, error) {
+	// This config will only be used for List and Watch calls of informers
+	// because we don't want these requests to time out after the regular timeout
+	// of Options.Client.Timeout (default 10s).
+	// Lists of informers have no timeouts set.
+	// Watches of informers are timing out per default after [5m, 2*5m].
+	// https://github.com/kubernetes/client-go/blob/v0.32.0/tools/cache/reflector.go#L53-L55
+	// We are setting 11m to set a timeout for List calls without influencing Watch calls.
+	configWithHigherTimeout := rest.CopyConfig(config)
+	configWithHigherTimeout.Timeout = 11 * time.Minute
+	httpClientWithHigherTimeout, err := rest.HTTPClientFor(configWithHigherTimeout)
+	if err != nil {
+		return nil, nil, errors.Wrapf(err, "error creating cache: error creating HTTP client")
+	}
+
 	// Create the cache for the cluster.
 	cacheOptions := cache.Options{
-		HTTPClient: httpClient,
+		HTTPClient: httpClientWithHigherTimeout,
 		Scheme:     clusterAccessorConfig.Scheme,
 		Mapper:     mapper,
 		SyncPeriod: clusterAccessorConfig.Cache.SyncPeriod,
 		ByObject:   clusterAccessorConfig.Cache.ByObject,
 	}
-	remoteCache, err := cache.New(config, cacheOptions)
+	remoteCache, err := cache.New(configWithHigherTimeout, cacheOptions)
 	if err != nil {
 		return nil, nil, errors.Wrapf(err, "error creating cache")
 	}