move some option struct from controller manager to kube-controller manager

cmd/kube-controller-manager/app/options/replicationcontroller.go

@@ -0,0 +1,58 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package options
+
+import (
+	"github.com/spf13/pflag"
+
+	"k8s.io/kubernetes/pkg/apis/componentconfig"
+)
+
+// ReplicationControllerOptions holds the ReplicationController options.
+type ReplicationControllerOptions struct {
+	ConcurrentRCSyncs int32
+}
+
+// AddFlags adds flags related to ReplicationController for controller manager to the specified FlagSet.
+func (o *ReplicationControllerOptions) AddFlags(fs *pflag.FlagSet) {
+	if o == nil {
+		return
+	}
+
+	fs.Int32Var(&o.ConcurrentRCSyncs, "concurrent_rc_syncs", o.ConcurrentRCSyncs, "The number of replication controllers that are allowed to sync concurrently. Larger number = more responsive replica management, but more CPU (and network) load")
+}
+
+// ApplyTo fills up ReplicationController config with options.
+func (o *ReplicationControllerOptions) ApplyTo(cfg *componentconfig.ReplicationControllerConfiguration) error {
+	if o == nil {
+		return nil
+	}
+
+	cfg.ConcurrentRCSyncs = o.ConcurrentRCSyncs
+
+	return nil
+}
+
+// Validate checks validation of ReplicationControllerOptions.
+func (o *ReplicationControllerOptions) Validate() []error {
+	if o == nil {
+		return nil
+	}
+
+	errs := []error{}
+	return errs
+}