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

cmd/kube-controller-manager/app/options/podgccontroller.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"
+)
+
+// PodGCControllerOptions holds the PodGCController options.
+type PodGCControllerOptions struct {
+	TerminatedPodGCThreshold int32
+}
+
+// AddFlags adds flags related to PodGCController for controller manager to the specified FlagSet.
+func (o *PodGCControllerOptions) AddFlags(fs *pflag.FlagSet) {
+	if o == nil {
+		return
+	}
+
+	fs.Int32Var(&o.TerminatedPodGCThreshold, "terminated-pod-gc-threshold", o.TerminatedPodGCThreshold, "Number of terminated pods that can exist before the terminated pod garbage collector starts deleting terminated pods. If <= 0, the terminated pod garbage collector is disabled.")
+}
+
+// ApplyTo fills up PodGCController config with options.
+func (o *PodGCControllerOptions) ApplyTo(cfg *componentconfig.PodGCControllerConfiguration) error {
+	if o == nil {
+		return nil
+	}
+
+	cfg.TerminatedPodGCThreshold = o.TerminatedPodGCThreshold
+
+	return nil
+}
+
+// Validate checks validation of PodGCControllerOptions.
+func (o *PodGCControllerOptions) Validate() []error {
+	if o == nil {
+		return nil
+	}
+
+	errs := []error{}
+	return errs
+}